diff --git a/.gitignore b/.gitignore
index 47657e0..49ed1a2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,4 +8,4 @@ Cargo.lock
 /target/
 /target_local/
 .md-*
-hidden
\ No newline at end of file
+hidden
diff --git a/contracts/revenue_pool/src/lib.rs b/contracts/revenue_pool/src/lib.rs
index 26f4e57..76564df 100644
--- a/contracts/revenue_pool/src/lib.rs
+++ b/contracts/revenue_pool/src/lib.rs
@@ -20,7 +20,8 @@ impl RevenuePool {
     /// * `usdc_token` – Stellar USDC (or wrapped USDC) token contract address.
     pub fn init(env: Env, admin: Address, usdc_token: Address) {
         admin.require_auth();
-        if env.storage().instance().has(&Symbol::new(&env, ADMIN_KEY)) {
+        let inst = env.storage().instance();
+        if inst.has(&Symbol::new(&env, ADMIN_KEY)) {
             panic!("revenue pool already initialized");
         }
         let inst = env.storage().instance();
@@ -36,7 +37,7 @@ impl RevenuePool {
         env.storage()
             .instance()
             .get(&Symbol::new(&env, ADMIN_KEY))
-            .unwrap_or_else(|| panic!("revenue pool not initialized"))
+            .expect("revenue pool not initialized")
     }
 
     /// Replace the current admin. Only the existing admin may call this.
@@ -156,7 +157,7 @@ impl RevenuePool {
             .storage()
             .instance()
             .get(&Symbol::new(&env, USDC_KEY))
-            .unwrap_or_else(|| panic!("revenue pool not initialized"));
+            .expect("revenue pool not initialized");
         let usdc = token::Client::new(&env, &usdc_address);
         usdc.balance(&env.current_contract_address())
     }
diff --git a/contracts/revenue_pool/src/test.rs b/contracts/revenue_pool/src/test.rs
index 05d6d51..a3d9429 100644
--- a/contracts/revenue_pool/src/test.rs
+++ b/contracts/revenue_pool/src/test.rs
@@ -185,6 +185,48 @@ fn distribute_negative_panics() {
     assert!(result.is_err());
 }
 
+#[test]
+fn receive_payment_from_non_vault() {
+    let env = Env::default();
+    env.mock_all_auths();
+    let admin = Address::generate(&env);
+    let (_, client) = create_pool(&env);
+    let (usdc, _, _) = create_usdc(&env, &admin);
+
+    client.init(&admin, &usdc);
+    client.receive_payment(&admin, &250, &false);
+
+    let events = env.events().all();
+    assert!(!events.is_empty());
+
+    client.init(&admin, &usdc);
+    client.set_admin(&attacker, &new_admin);
+}
+
+#[test]
+#[should_panic(expected = "revenue pool not initialized")]
+fn balance_before_init_panics() {
+    let env = Env::default();
+    let (_, client) = create_pool(&env);
+    client.balance();
+}
+
+#[test]
+fn distribute_negative_panics() {
+    let env = Env::default();
+    env.mock_all_auths();
+    let admin = Address::generate(&env);
+    let developer = Address::generate(&env);
+    let (_, client) = create_pool(&env);
+    let (usdc, _, _) = create_usdc(&env, &admin);
+
+    client.init(&admin, &usdc);
+    let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {
+        client.distribute(&admin, &developer, &-1);
+    }));
+    assert!(result.is_err());
+}
+
 #[test]
 fn receive_payment_from_non_vault() {
     let env = Env::default();
@@ -260,18 +302,43 @@ fn batch_distribute_success() {
     assert_eq!(client.balance(), 500);
 }
 
+/// Full lifecycle test: init, get_admin, balance, distribute, receive_payment, set_admin.
 #[test]
-#[should_panic(expected = "unauthorized: caller is not admin")]
-fn batch_distribute_unauthorized_panics() {
+fn full_lifecycle() {
     let env = Env::default();
     env.mock_all_auths();
     let admin = Address::generate(&env);
+    let new_admin = Address::generate(&env);
+    let developer = Address::generate(&env);
     let attacker = Address::generate(&env);
     let dev = Address::generate(&env);
     let (pool_addr, client) = create_pool(&env);
-    let (usdc_address, _, usdc_admin) = create_usdc(&env, &admin);
+    let (usdc_address, usdc_client, usdc_admin) = create_usdc(&env, &admin);
 
+    // Init
     client.init(&admin, &usdc_address);
+    assert_eq!(client.get_admin(), admin);
+
+    // Fund and check balance
+    fund_pool(&usdc_admin, &pool_addr, 1000);
+    assert_eq!(client.balance(), 1000);
+
+    // Distribute
+    client.distribute(&admin, &developer, &400);
+    assert_eq!(usdc_client.balance(&developer), 400);
+    assert_eq!(client.balance(), 600);
+
+    // Receive payment event
+    client.receive_payment(&admin, &100, &true);
+
+    // Set admin
+    client.set_admin(&admin, &new_admin);
+    assert_eq!(client.get_admin(), new_admin);
+
+    // New admin can distribute
+    client.distribute(&new_admin, &developer, &100);
+    assert_eq!(usdc_client.balance(&developer), 500);
+    assert_eq!(client.balance(), 500);
     fund_pool(&usdc_admin, &pool_addr, 500);
 
     let mut payments: Vec<(Address, i128)> = Vec::new(&env);
@@ -314,3 +381,76 @@ fn batch_distribute_insufficient_balance_panics() {
     payments.push_back((dev.clone(), 100_i128));
     client.batch_distribute(&admin, &payments);
 }
+
+#[test]
+fn batch_distribute_success() {
+    let env = Env::default();
+    env.mock_all_auths();
+    let admin = Address::generate(&env);
+    let dev1 = Address::generate(&env);
+    let dev2 = Address::generate(&env);
+    let (pool_addr, client) = create_pool(&env);
+    let (usdc_address, usdc_client, usdc_admin) = create_usdc(&env, &admin);
+
+    client.init(&admin, &usdc_address);
+    fund_pool(&usdc_admin, &pool_addr, 1_000);
+
+    let payments = soroban_sdk::vec![&env, (dev1.clone(), 300_i128), (dev2.clone(), 200_i128)];
+    client.batch_distribute(&admin, &payments);
+
+    assert_eq!(usdc_client.balance(&dev1), 300);
+    assert_eq!(usdc_client.balance(&dev2), 200);
+    assert_eq!(usdc_client.balance(&pool_addr), 500);
+}
+
+#[test]
+#[should_panic(expected = "unauthorized: caller is not admin")]
+fn batch_distribute_unauthorized_panics() {
+    let env = Env::default();
+    env.mock_all_auths();
+    let admin = Address::generate(&env);
+    let attacker = Address::generate(&env);
+    let dev = Address::generate(&env);
+    let (pool_addr, client) = create_pool(&env);
+    let (usdc_address, _, usdc_admin) = create_usdc(&env, &admin);
+
+    client.init(&admin, &usdc_address);
+    fund_pool(&usdc_admin, &pool_addr, 500);
+
+    let payments = soroban_sdk::vec![&env, (dev.clone(), 100_i128)];
+    client.batch_distribute(&attacker, &payments);
+}
+
+#[test]
+#[should_panic(expected = "amount must be positive")]
+fn batch_distribute_zero_amount_panics() {
+    let env = Env::default();
+    env.mock_all_auths();
+    let admin = Address::generate(&env);
+    let dev = Address::generate(&env);
+    let (pool_addr, client) = create_pool(&env);
+    let (usdc_address, _, usdc_admin) = create_usdc(&env, &admin);
+
+    client.init(&admin, &usdc_address);
+    fund_pool(&usdc_admin, &pool_addr, 500);
+
+    let payments = soroban_sdk::vec![&env, (dev.clone(), 0_i128)];
+    client.batch_distribute(&admin, &payments);
+}
+
+#[test]
+#[should_panic(expected = "insufficient USDC balance")]
+fn batch_distribute_insufficient_balance_panics() {
+    let env = Env::default();
+    env.mock_all_auths();
+    let admin = Address::generate(&env);
+    let dev = Address::generate(&env);
+    let (pool_addr, client) = create_pool(&env);
+    let (usdc_address, _, usdc_admin) = create_usdc(&env, &admin);
+
+    client.init(&admin, &usdc_address);
+    fund_pool(&usdc_admin, &pool_addr, 100);
+
+    let payments = soroban_sdk::vec![&env, (dev.clone(), 200_i128)];
+    client.batch_distribute(&admin, &payments);
+}
diff --git a/contracts/vault/src/test.rs b/contracts/vault/src/test.rs
index 9b6b9c1..e23e912 100644
--- a/contracts/vault/src/test.rs
+++ b/contracts/vault/src/test.rs
@@ -1114,6 +1114,8 @@ fn withdraw_reduces_balance() {
 #[test]
 fn withdraw_insufficient_balance_fails() {
     let env = Env::default();
+    env.mock_all_auths();
+
     let owner = Address::generate(&env);
     let contract_id = env.register(CalloraVault {}, ());
     let client = CalloraVaultClient::new(&env, &contract_id);
@@ -1195,6 +1197,67 @@ fn withdraw_to_reduces_balance() {
 #[test]
 fn withdraw_to_insufficient_balance_fails() {
     let env = Env::default();
+    let owner = Address::generate(&env);
+    let recipient = Address::generate(&env);
+    let contract_id = env.register(CalloraVault {}, ());
+    let client = CalloraVaultClient::new(&env, &contract_id);
+    let (usdc_token, _, usdc_admin) = create_usdc(&env, &owner);
+
+    env.mock_all_auths();
+    fund_vault(&usdc_admin, &contract_id, 100);
+    client.init(&owner, &usdc_token, &Some(100), &None, &None, &None);
+
+    let result = client.try_withdraw_to(&recipient, &500);
+    assert!(result.is_err(), "expected error for insufficient balance");
+}
+
+#[test]
+fn deposit_below_minimum_fails() {
+    let env = Env::default();
+    let owner = Address::generate(&env);
+    let depositor = Address::generate(&env);
+    let contract_id = env.register(CalloraVault {}, ());
+    let client = CalloraVaultClient::new(&env, &contract_id);
+    let (usdc_token, _, usdc_admin) = create_usdc(&env, &owner);
+
+    env.mock_all_auths();
+    fund_vault(&usdc_admin, &contract_id, 100);
+    client.init(&owner, &usdc_token, &Some(100), &Some(50), &None, &None);
+
+    fund_vault(&usdc_admin, &depositor, 30);
+    let usdc_client = token::Client::new(&env, &usdc_token);
+    usdc_client.approve(&depositor, &contract_id, &30, &1000);
+    let result = client.try_deposit(&depositor, &30);
+    assert!(result.is_err(), "expected error for deposit below minimum");
+}
+
+#[test]
+fn deposit_at_minimum_succeeds() {
+    let env = Env::default();
+    let owner = Address::generate(&env);
+    let depositor = Address::generate(&env);
+    let contract_id = env.register(CalloraVault {}, ());
+    let client = CalloraVaultClient::new(&env, &contract_id);
+    let (usdc_token, _, usdc_admin) = create_usdc(&env, &owner);
+
+    env.mock_all_auths();
+    fund_vault(&usdc_admin, &contract_id, 100);
+    client.init(&owner, &usdc_token, &Some(100), &Some(50), &None, &None);
+
+    fund_vault(&usdc_admin, &depositor, 50);
+    let usdc_client = token::Client::new(&env, &usdc_token);
+    usdc_client.approve(&depositor, &contract_id, &50, &1000);
+    let new_balance = client.deposit(&depositor, &50);
+    assert_eq!(new_balance, 150);
+}
+
+#[test]
+fn double_init_fails() {
+    let env = Env::default();
+    let owner = Address::generate(&env);
+    let contract_id = env.register(CalloraVault {}, ());
+    let client = CalloraVaultClient::new(&env, &contract_id);
+    let (usdc_token, _, usdc_admin) = create_usdc(&env, &owner);
 
     let owner = Address::generate(&env);
     let new_owner = Address::generate(&env);
diff --git a/coverage/cobertura.xml b/coverage/cobertura.xml
index 3a7a6b4..7642a09 100644
--- a/coverage/cobertura.xml
+++ b/coverage/cobertura.xml
@@ -1 +1,2 @@
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hits="5"/><line number="238" hits="2"/><line number="240" hits="2"/><line number="241" hits="6"/><line number="242" hits="3"/><line number="243" hits="1"/><line number="244" hits="3"/><line number="245" hits="4"/><line number="246" hits="3"/><line number="249" hits="1"/><line number="250" hits="4"/><line number="251" hits="3"/><line number="252" hits="2"/><line number="253" hits="2"/><line number="254" hits="2"/><line number="255" hits="1"/><line number="256" hits="1"/><line number="257" hits="1"/><line number="260" hits="3"/><line number="263" hits="1"/><line number="264" hits="3"/><line number="265" hits="3"/><line number="266" hits="3"/><line number="270" hits="1"/><line number="271" hits="2"/><line number="272" hits="2"/><line number="273" hits="3"/><line number="274" hits="3"/><line number="279" hits="2"/><line number="281" hits="1"/><line number="282" hits="2"/><line number="284" hits="1"/><line number="285" hits="2"/><line number="286" hits="1"/><line number="288" hits="2"/><line number="289" hits="2"/><line number="290" hits="1"/><line number="292" hits="1"/><line number="296" hits="2"/><line number="297" hits="3"/><line number="298" hits="1"/><line number="299" hits="1"/><line number="300" hits="4"/><line number="305" hits="2"/><line number="307" hits="1"/><line number="308" hits="2"/><line number="310" hits="1"/><line number="311" hits="2"/><line number="312" hits="1"/><line number="314" hits="2"/><line number="316" hits="1"/><line number="317" hits="1"/><line number="318" hits="1"/><line number="320" hits="1"/><line number="322" hits="2"/><line number="326" hits="1"/><line number="327" hits="1"/></lines></class><class name="test" filename="contracts/vault/src/test.rs" line-rate="1" branch-rate="0" complexity="0"><methods/><lines><line number="7" hits="1"/><line number="11" hits="1"/><line number="12" hits="1"/><line number="13" hits="11"/><line number="14" hits="1"/><line number="15" hits="2"/><line number="18" hits="1"/><line number="19" hits="1"/><line number="20" hits="1"/><line number="21" hits="1"/><line number="24" hits="9"/><line number="29" hits="3"/></lines></class></classes></package></packages></coverage>
\ No newline at end of file
+<?xml version="1.0"?><coverage lines-covered="247" lines-valid="247" line-rate="1" branches-covered="0" branches-valid="0" branch-rate="0" complexity="0" version="1.9" timestamp="1772107636"><sources><source>/home/jeffersonyouashi/Documents/DRIPS/Callora-Contracts</source></sources><packages><package name="contracts/vault/src" line-rate="1" branch-rate="0" complexity="0"><classes><class name="lib" filename="contracts/vault/src/lib.rs" line-rate="1" branch-rate="0" complexity="0"><methods/><lines><line number="50" hits="13"/><line number="59" hits="2"/><line number="60" hits="10"/><line number="61" hits="1"/><line number="63" hits="2"/><line number="64" hits="4"/><line number="65" hits="1"/><line number="66" hits="4"/><line number="67" hits="5"/><line number="68" hits="2"/><line number="71" hits="3"/><line number="72" hits="1"/><line number="73" hits="5"/><line number="74" hits="2"/><line number="77" hits="11"/><line number="82" hits="16"/><line number="83" hits="5"/><line number="84" 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diff --git a/coverage/tarpaulin-report.html b/coverage/tarpaulin-report.html
index 1b37319..dc56e2b 100644
--- a/coverage/tarpaulin-report.html
+++ b/coverage/tarpaulin-report.html
@@ -193,6 +193,8 @@
 <body>
     <div id="root"></div>
     <script>
+        var data = {"files":[{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","contracts","revenue_pool","src","lib.rs"],"content":"#![no_std]\n\nuse soroban_sdk::{contract, contractimpl, token, Address, Env, Symbol, Vec};\n\n/// Revenue settlement contract: receives USDC from vault deducts and distributes to developers.\n///\n/// Flow: vault deduct → vault transfers USDC to this contract → admin calls distribute(to, amount).\nconst ADMIN_KEY: \u0026str = \"admin\";\nconst USDC_KEY: \u0026str = \"usdc\";\n\n#[contract]\npub struct RevenuePool;\n\n#[contractimpl]\nimpl RevenuePool {\n    /// Initialize the revenue pool with an admin and the USDC token address.\n    ///\n    /// # Arguments\n    /// * `admin` – Address that may call `distribute`. Typically backend or multisig.\n    /// * `usdc_token` – Stellar USDC (or wrapped USDC) token contract address.\n    pub fn init(env: Env, admin: Address, usdc_token: Address) {\n        admin.require_auth();\n        let inst = env.storage().instance();\n        if inst.has(\u0026Symbol::new(\u0026env, ADMIN_KEY)) {\n            panic!(\"revenue pool already initialized\");\n        }\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026admin);\n        inst.set(\u0026Symbol::new(\u0026env, USDC_KEY), \u0026usdc_token);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"init\"), admin), usdc_token);\n    }\n\n    /// Return the current admin address.\n    pub fn get_admin(env: Env) -\u003e Address {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, ADMIN_KEY))\n            .expect(\"revenue pool not initialized\")\n    }\n\n    /// Replace the current admin. Only the existing admin may call this.\n    pub fn set_admin(env: Env, caller: Address, new_admin: Address) {\n        caller.require_auth();\n        let current = Self::get_admin(env.clone());\n        if caller != current {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026new_admin);\n    }\n\n    /// Placeholder: record that payment was received (e.g. from vault).\n    /// In practice, USDC is received when the vault (or any address) transfers tokens\n    /// to this contract's address; no separate \"receive\" call is required.\n    ///\n    /// This function can be used to emit an event for indexers when the backend\n    /// wants to log that a payment was credited from the vault.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be admin (or could be extended to allow vault to call).\n    /// * `amount` – Amount received (for event logging).\n    /// * `from_vault` – Optional; true if the source was the vault.\n    pub fn receive_payment(env: Env, caller: Address, amount: i128, from_vault: bool) {\n        caller.require_auth();\n        let _admin = Self::get_admin(env.clone());\n        env.events().publish(\n            (Symbol::new(\u0026env, \"receive_payment\"), caller),\n            (amount, from_vault),\n        );\n    }\n\n    /// Distribute USDC from this contract to a developer wallet.\n    ///\n    /// Only the admin may call. Transfers USDC from this contract to `to`.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be the current admin.\n    /// * `to` – Developer address to receive USDC.\n    /// * `amount` – Amount in token base units (e.g. USDC stroops).\n    pub fn distribute(env: Env, caller: Address, to: Address, amount: i128) {\n        caller.require_auth();\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        if amount \u003c= 0 {\n            panic!(\"amount must be positive\");\n        }\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"revenue pool not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        let contract_address = env.current_contract_address();\n        if usdc.balance(\u0026contract_address) \u003c amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        usdc.transfer(\u0026contract_address, \u0026to, \u0026amount);\n        env.events()\n            .publish((Symbol::new(\u0026env, \"distribute\"), to), amount);\n    }\n\n    /// Distribute USDC from this contract to multiple developer wallets in one transaction.\n    ///\n    /// Only the admin may call. Iterates through the vector of payments and atomically\n    /// transfers USDC to each developer. Fails if the total amount exceeds balance\n    /// or if any individual amount is not positive.\n    ///\n    /// # Arguments\n    /// * `caller` - Must be the current admin.\n    /// * `payments` - A vector of (Address, amount) tuples.\n    pub fn batch_distribute(env: Env, caller: Address, payments: Vec\u003c(Address, i128)\u003e) {\n        caller.require_auth();\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n\n        let mut total_amount: i128 = 0;\n        for payment in payments.iter() {\n            let (_, amount) = payment;\n            if amount \u003c= 0 {\n                panic!(\"amount must be positive\");\n            }\n            total_amount += amount;\n        }\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"revenue pool not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        let contract_address = env.current_contract_address();\n        if usdc.balance(\u0026contract_address) \u003c total_amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        for payment in payments.iter() {\n            let (to, amount) = payment;\n            usdc.transfer(\u0026contract_address, \u0026to, \u0026amount);\n            env.events()\n                .publish((Symbol::new(\u0026env, \"batch_distribute\"), to), amount);\n        }\n    }\n\n    /// Return this contract's USDC balance (for testing and dashboards).\n    pub fn balance(env: Env) -\u003e i128 {\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"revenue pool not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.balance(\u0026env.current_contract_address())\n    }\n}\n\n#[cfg(test)]\nmod test;\n","traces":[{"line":21,"address":[10910421,10910544,10909392],"length":1,"stats":{"Line":5}},{"line":22,"address":[10909427],"length":1,"stats":{"Line":8}},{"line":23,"address":[10909521],"length":1,"stats":{"Line":4}},{"line":24,"address":[10909649],"length":1,"stats":{"Line":9}},{"line":25,"address":[10910427],"length":1,"stats":{"Line":1}},{"line":27,"address":[10909801],"length":1,"stats":{"Line":4}},{"line":28,"address":[10909925],"length":1,"stats":{"Line":9}},{"line":30,"address":[10910057],"length":1,"stats":{"Line":4}},{"line":31,"address":[10910069],"length":1,"stats":{"Line":10}},{"line":35,"address":[10911789,10911408],"length":1,"stats":{"Line":1}},{"line":36,"address":[10911434],"length":1,"stats":{"Line":1}},{"line":38,"address":[10911631,10911544],"length":1,"stats":{"Line":2}},{"line":43,"address":[10911808,10912474,10912510],"length":1,"stats":{"Line":2}},{"line":44,"address":[10911843],"length":1,"stats":{"Line":1}},{"line":45,"address":[10911905],"length":1,"stats":{"Line":1}},{"line":46,"address":[10911934,10911996],"length":1,"stats":{"Line":2}},{"line":47,"address":[10912022,10912490],"length":1,"stats":{"Line":2}},{"line":49,"address":[10912015,10912054],"length":1,"stats":{"Line":2}},{"line":50,"address":[10912193],"length":1,"stats":{"Line":1}},{"line":64,"address":[10906579,10906617,10906032],"length":1,"stats":{"Line":1}},{"line":65,"address":[10906099],"length":1,"stats":{"Line":1}},{"line":66,"address":[10906177],"length":1,"stats":{"Line":1}},{"line":67,"address":[10906214,10906494],"length":1,"stats":{"Line":2}},{"line":68,"address":[10906264,10906355],"length":1,"stats":{"Line":3}},{"line":81,"address":[10905984,10904368,10905858],"length":1,"stats":{"Line":3}},{"line":82,"address":[10904408],"length":1,"stats":{"Line":3}},{"line":83,"address":[10904489],"length":1,"stats":{"Line":1}},{"line":84,"address":[10904521,10904583],"length":1,"stats":{"Line":2}},{"line":85,"address":[10905931,10904611],"length":1,"stats":{"Line":2}},{"line":87,"address":[10904589],"length":1,"stats":{"Line":1}},{"line":88,"address":[10905903,10904663],"length":1,"stats":{"Line":2}},{"line":94,"address":[10904771,10904867],"length":1,"stats":{"Line":2}},{"line":96,"address":[10905145],"length":1,"stats":{"Line":1}},{"line":98,"address":[10905177],"length":1,"stats":{"Line":1}},{"line":99,"address":[10905237,10905325],"length":1,"stats":{"Line":2}},{"line":100,"address":[10905873,10905382],"length":1,"stats":{"Line":2}},{"line":103,"address":[10905350],"length":1,"stats":{"Line":1}},{"line":104,"address":[10905657,10905426],"length":1,"stats":{"Line":2}},{"line":105,"address":[10905683,10905438],"length":1,"stats":{"Line":4}},{"line":117,"address":[10908873,10909176,10906640],"length":1,"stats":{"Line":3}},{"line":118,"address":[10906678],"length":1,"stats":{"Line":1}},{"line":119,"address":[10906750],"length":1,"stats":{"Line":1}},{"line":120,"address":[10906856,10906785],"length":1,"stats":{"Line":2}},{"line":121,"address":[10906909,10909155],"length":1,"stats":{"Line":2}},{"line":124,"address":[10906870],"length":1,"stats":{"Line":1}},{"line":125,"address":[10907053,10906902,10906957],"length":1,"stats":{"Line":3}},{"line":126,"address":[10907144],"length":1,"stats":{"Line":1}},{"line":127,"address":[10907186],"length":1,"stats":{"Line":1}},{"line":128,"address":[10908982,10909124],"length":1,"stats":{"Line":2}},{"line":130,"address":[10908941,10909020,10909054],"length":1,"stats":{"Line":2}},{"line":136,"address":[10907412,10907316],"length":1,"stats":{"Line":2}},{"line":138,"address":[10907690],"length":1,"stats":{"Line":1}},{"line":140,"address":[10907722],"length":1,"stats":{"Line":1}},{"line":141,"address":[10907870,10907782],"length":1,"stats":{"Line":2}},{"line":142,"address":[10908911,10907919],"length":1,"stats":{"Line":2}},{"line":145,"address":[10908868,10907912,10907967,10908063],"length":1,"stats":{"Line":4}},{"line":146,"address":[10908158],"length":1,"stats":{"Line":1}},{"line":147,"address":[10908246],"length":1,"stats":{"Line":1}},{"line":148,"address":[10908802,10908566],"length":1,"stats":{"Line":2}},{"line":149,"address":[10908578,10908834],"length":1,"stats":{"Line":2}},{"line":154,"address":[10910560,10911384],"length":1,"stats":{"Line":1}},{"line":158,"address":[10910701,10910788],"length":1,"stats":{"Line":2}},{"line":160,"address":[10911051],"length":1,"stats":{"Line":1}},{"line":161,"address":[10911080,10911140],"length":1,"stats":{"Line":2}}],"covered":64,"coverable":64},{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","contracts","revenue_pool","src","test.rs"],"content":"extern crate std;\n\nuse super::*;\nuse soroban_sdk::testutils::{Address as _, Events as _};\nuse soroban_sdk::token;\n\nfn create_usdc\u003c'a\u003e(\n    env: \u0026'a Env,\n    admin: \u0026Address,\n) -\u003e (Address, token::Client\u003c'a\u003e, token::StellarAssetClient\u003c'a\u003e) {\n    let contract_address = env.register_stellar_asset_contract_v2(admin.clone());\n    let address = contract_address.address();\n    let client = token::Client::new(env, \u0026address);\n    let admin_client = token::StellarAssetClient::new(env, \u0026address);\n    (address, client, admin_client)\n}\n\nfn create_pool(env: \u0026Env) -\u003e (Address, RevenuePoolClient\u003c'_\u003e) {\n    let address = env.register(RevenuePool, ());\n    let client = RevenuePoolClient::new(env, \u0026address);\n    (address, client)\n}\n\nfn fund_pool(usdc_admin_client: \u0026token::StellarAssetClient, pool_address: \u0026Address, amount: i128) {\n    usdc_admin_client.mint(pool_address, \u0026amount);\n}\n\n#[test]\nfn init_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_pool_addr, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    assert_eq!(client.get_admin(), admin);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\n#[should_panic(expected = \"revenue pool already initialized\")]\nfn init_double_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.init(\u0026admin, \u0026usdc);\n}\n\n#[test]\nfn distribute_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1_000);\n    client.distribute(\u0026admin, \u0026developer, \u0026400);\n\n    assert_eq!(usdc_client.balance(\u0026pool_addr), 600);\n    assert_eq!(usdc_client.balance(\u0026developer), 400);\n}\n\n#[test]\n#[should_panic(expected = \"amount must be positive\")]\nfn distribute_zero_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.distribute(\u0026admin, \u0026developer, \u00260);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient USDC balance\")]\nfn distribute_excess_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 100);\n    client.distribute(\u0026admin, \u0026developer, \u0026101);\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn distribute_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n    client.distribute(\u0026attacker, \u0026developer, \u0026100);\n}\n\n#[test]\nfn set_admin_transfers_control() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 300);\n    client.set_admin(\u0026admin, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    client.distribute(\u0026new_admin, \u0026developer, \u0026100);\n    assert_eq!(usdc_client.balance(\u0026developer), 100);\n}\n\n#[test]\nfn receive_payment_emits_event() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.receive_payment(\u0026admin, \u0026500, \u0026true);\n    let events = env.events().all();\n    assert!(!events.is_empty());\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn set_admin_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.set_admin(\u0026attacker, \u0026new_admin);\n}\n\n#[test]\n#[should_panic(expected = \"revenue pool not initialized\")]\nfn balance_before_init_panics() {\n    let env = Env::default();\n    let (_, client) = create_pool(\u0026env);\n    client.balance();\n}\n\n#[test]\nfn distribute_negative_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {\n        client.distribute(\u0026admin, \u0026developer, \u0026-1);\n    }));\n    assert!(result.is_err());\n}\n\n#[test]\nfn receive_payment_from_non_vault() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.receive_payment(\u0026admin, \u0026250, \u0026false);\n\n    let events = env.events().all();\n    assert!(!events.is_empty());\n}\n\n/// Full lifecycle test: init, get_admin, balance, distribute, receive_payment, set_admin.\n#[test]\nfn full_lifecycle() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    // Init\n    client.init(\u0026admin, \u0026usdc_address);\n    assert_eq!(client.get_admin(), admin);\n\n    // Fund and check balance\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1000);\n    assert_eq!(client.balance(), 1000);\n\n    // Distribute\n    client.distribute(\u0026admin, \u0026developer, \u0026400);\n    assert_eq!(usdc_client.balance(\u0026developer), 400);\n    assert_eq!(client.balance(), 600);\n\n    // Receive payment event\n    client.receive_payment(\u0026admin, \u0026100, \u0026true);\n\n    // Set admin\n    client.set_admin(\u0026admin, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    // New admin can distribute\n    client.distribute(\u0026new_admin, \u0026developer, \u0026100);\n    assert_eq!(usdc_client.balance(\u0026developer), 500);\n    assert_eq!(client.balance(), 500);\n}\n\n#[test]\nfn get_admin_before_init_fails() {\n    let env = Env::default();\n    let (_, client) = create_pool(\u0026env);\n    let result = client.try_get_admin();\n    assert!(result.is_err(), \"expected error when pool not initialized\");\n}\n\n#[test]\nfn balance_before_init_fails() {\n    let env = Env::default();\n    let (_, client) = create_pool(\u0026env);\n    let result = client.try_balance();\n    assert!(result.is_err(), \"expected error when pool not initialized\");\n}\n\n#[test]\nfn set_admin_unauthorized_fails() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let intruder = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    let result = client.try_set_admin(\u0026intruder, \u0026new_admin);\n    assert!(result.is_err(), \"expected error for unauthorized set_admin\");\n}\n\n#[test]\nfn batch_distribute_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev1 = Address::generate(\u0026env);\n    let dev2 = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1_000);\n\n    let payments = soroban_sdk::vec![\u0026env, (dev1.clone(), 300_i128), (dev2.clone(), 200_i128)];\n    client.batch_distribute(\u0026admin, \u0026payments);\n\n    assert_eq!(usdc_client.balance(\u0026dev1), 300);\n    assert_eq!(usdc_client.balance(\u0026dev2), 200);\n    assert_eq!(usdc_client.balance(\u0026pool_addr), 500);\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn batch_distribute_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n\n    let payments = soroban_sdk::vec![\u0026env, (dev.clone(), 100_i128)];\n    client.batch_distribute(\u0026attacker, \u0026payments);\n}\n\n#[test]\n#[should_panic(expected = \"amount must be positive\")]\nfn batch_distribute_zero_amount_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n\n    let payments = soroban_sdk::vec![\u0026env, (dev.clone(), 0_i128)];\n    client.batch_distribute(\u0026admin, \u0026payments);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient USDC balance\")]\nfn batch_distribute_insufficient_balance_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 100);\n\n    let payments = soroban_sdk::vec![\u0026env, (dev.clone(), 200_i128)];\n    client.batch_distribute(\u0026admin, \u0026payments);\n}\n","traces":[{"line":7,"address":[10947311,10947317,10946848],"length":1,"stats":{"Line":13}},{"line":11,"address":[10946910],"length":1,"stats":{"Line":13}},{"line":12,"address":[10946949],"length":1,"stats":{"Line":13}},{"line":13,"address":[10947014],"length":1,"stats":{"Line":2}},{"line":14,"address":[10947087],"length":1,"stats":{"Line":2}},{"line":15,"address":[10947155],"length":1,"stats":{"Line":2}},{"line":18,"address":[10946831,10946640,10946825],"length":1,"stats":{"Line":1}},{"line":19,"address":[10946679],"length":1,"stats":{"Line":1}},{"line":20,"address":[10946699],"length":1,"stats":{"Line":1}},{"line":21,"address":[10946744],"length":1,"stats":{"Line":1}},{"line":24,"address":[10969872],"length":1,"stats":{"Line":3}},{"line":25,"address":[10969895],"length":1,"stats":{"Line":5}}],"covered":12,"coverable":12},{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","contracts","vault","src","lib.rs"],"content":"#![no_std]\n\nuse soroban_sdk::{contract, contractimpl, contracttype, token, Address, Env, Symbol, Vec};\n\n/// Single item for batch deduct: amount and optional request id for idempotency/tracking.\n#[contracttype]\n#[derive(Clone)]\npub struct DeductItem {\n    pub amount: i128,\n    pub request_id: Option\u003cSymbol\u003e,\n}\n\n#[contracttype]\n#[derive(Clone)]\npub struct VaultMeta {\n    pub owner: Address,\n    pub balance: i128,\n    /// Minimum amount required per deposit; deposits below this panic.\n    pub min_deposit: i128,\n}\n\nconst META_KEY: \u0026str = \"meta\";\nconst USDC_KEY: \u0026str = \"usdc\";\nconst ADMIN_KEY: \u0026str = \"admin\";\nconst REVENUE_POOL_KEY: \u0026str = \"revenue_pool\";\nconst MAX_DEDUCT_KEY: \u0026str = \"max_deduct\";\n\n/// Default maximum single deduct amount when not set at init (no cap).\npub const DEFAULT_MAX_DEDUCT: i128 = i128::MAX;\n\n#[contracttype]\n#[derive(Clone, Debug, PartialEq)]\npub struct DistributeEvent {\n    pub to: Address,\n    pub amount: i128,\n}\n\n#[contract]\npub struct CalloraVault;\n\n#[contractimpl]\nimpl CalloraVault {\n    /// Initialize vault for an owner with optional initial balance and minimum deposit.\n    /// If initial_balance \u003e 0, the contract must already hold at least that much USDC (e.g. deployer transferred in first).\n    /// Emits an \"init\" event with the owner address and initial balance.\n    ///\n    /// # Arguments\n    /// * `revenue_pool` – Optional address to receive USDC on each deduct (e.g. settlement contract). If None, USDC stays in vault.\n    /// * `max_deduct` – Optional cap per single deduct; if None, uses DEFAULT_MAX_DEDUCT (no cap).\n    pub fn init(\n        env: Env,\n        owner: Address,\n        usdc_token: Address,\n        initial_balance: Option\u003ci128\u003e,\n        min_deposit: Option\u003ci128\u003e,\n        revenue_pool: Option\u003cAddress\u003e,\n        max_deduct: Option\u003ci128\u003e,\n    ) -\u003e VaultMeta {\n        owner.require_auth();\n        if env.storage().instance().has(\u0026Symbol::new(\u0026env, META_KEY)) {\n            panic!(\"vault already initialized\");\n        }\n        let balance = initial_balance.unwrap_or(0);\n        if balance \u003e 0 {\n            let usdc = token::Client::new(\u0026env, \u0026usdc_token);\n            let contract_balance = usdc.balance(\u0026env.current_contract_address());\n            if contract_balance \u003c balance {\n                panic!(\"insufficient USDC in contract for initial_balance\");\n            }\n        }\n        let min_deposit_val = min_deposit.unwrap_or(0);\n        let max_deduct_val = max_deduct.unwrap_or(DEFAULT_MAX_DEDUCT);\n        if max_deduct_val \u003c= 0 {\n            panic!(\"max_deduct must be positive\");\n        }\n        let meta = VaultMeta {\n            owner: owner.clone(),\n            balance,\n            min_deposit: min_deposit_val,\n        };\n        // Persist metadata under both the literal key and the constant for safety.\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n        inst.set(\u0026Symbol::new(\u0026env, META_KEY), \u0026meta);\n        inst.set(\u0026Symbol::new(\u0026env, USDC_KEY), \u0026usdc_token);\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026owner);\n        if let Some(pool) = revenue_pool {\n            inst.set(\u0026Symbol::new(\u0026env, REVENUE_POOL_KEY), \u0026pool);\n        }\n        inst.set(\u0026Symbol::new(\u0026env, MAX_DEDUCT_KEY), \u0026max_deduct_val);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"init\"), owner), balance);\n\n        meta\n    }\n\n    /// Return the current admin address.\n    pub fn get_admin(env: Env) -\u003e Address {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, ADMIN_KEY))\n            .unwrap_or_else(|| panic!(\"vault not initialized\"))\n    }\n\n    /// Replace the current admin. Only the existing admin may call this.\n    pub fn set_admin(env: Env, caller: Address, new_admin: Address) {\n        caller.require_auth();\n        let current_admin = Self::get_admin(env.clone());\n        if caller != current_admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026new_admin);\n    }\n\n    /// Return the maximum allowed amount for a single deduct (configurable at init).\n    pub fn get_max_deduct(env: Env) -\u003e i128 {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, MAX_DEDUCT_KEY))\n            .unwrap_or_else(|| panic!(\"vault not initialized\"))\n    }\n\n    /// Return the revenue pool address if set (receives USDC on deduct).\n    pub fn get_revenue_pool(env: Env) -\u003e Option\u003cAddress\u003e {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, REVENUE_POOL_KEY))\n            .unwrap_or(None)\n    }\n\n    /// Distribute accumulated USDC to a single developer address.\n    ///\n    /// # Access control\n    /// Only the admin (backend / multisig) may call this.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be the current admin address.\n    /// * `to`     – Developer wallet to receive the USDC.\n    /// * `amount` – Amount in USDC micro-units (must be \u003e 0 and ≤ vault balance).\n    ///\n    /// # Panics\n    /// * `\"unauthorized: caller is not admin\"` – caller is not the admin.\n    /// * `\"amount must be positive\"`           – amount is zero or negative.\n    /// * `\"insufficient USDC balance\"`         – vault holds less than amount.\n    ///\n    /// # Events\n    /// Emits topic `(\"distribute\", to)` with data `amount` on success.\n    pub fn distribute(env: Env, caller: Address, to: Address, amount: i128) {\n        // 1. Require on-chain signature from caller.\n        caller.require_auth();\n\n        // 2. Only the registered admin may distribute.\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n\n        // 3. Amount must be positive.\n        if amount \u003c= 0 {\n            panic!(\"amount must be positive\");\n        }\n\n        // 4. Load the USDC token address.\n        let usdc_opt: Option\u003cAddress\u003e = env.storage().instance().get(\u0026Symbol::new(\u0026env, USDC_KEY));\n        let usdc_address: Address = usdc_opt.unwrap_or_else(|| panic!(\"vault not initialized\"));\n\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        // 5. Check vault has enough USDC.\n        let vault_balance = usdc.balance(\u0026env.current_contract_address());\n        if vault_balance \u003c amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        // 6. Transfer USDC from vault to developer.\n        usdc.transfer(\u0026env.current_contract_address(), \u0026to, \u0026amount);\n\n        // 7. Emit distribute event.\n        env.events()\n            .publish((Symbol::new(\u0026env, \"distribute\"), to), amount);\n    }\n\n    /// Get vault metadata (owner and balance).\n    pub fn get_meta(env: Env) -\u003e VaultMeta {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, META_KEY))\n            .unwrap_or_else(|| panic!(\"vault not initialized\"))\n    }\n\n    /// Deposit: user transfers USDC to the contract; contract increases internal balance.\n    /// Caller must have authorized the transfer (token transfer_from). Supports multiple depositors.\n    /// Emits a \"deposit\" event with the depositor address and amount.\n    pub fn deposit(env: Env, from: Address, amount: i128) -\u003e i128 {\n        from.require_auth();\n\n        let mut meta = Self::get_meta(env.clone());\n        assert!(\n            amount \u003e= meta.min_deposit,\n            \"deposit below minimum: {} \u003c {}\",\n            amount,\n            meta.min_deposit\n        );\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer_from(\n            \u0026env.current_contract_address(),\n            \u0026from,\n            \u0026env.current_contract_address(),\n            \u0026amount,\n        );\n\n        meta.balance += amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"deposit\"), from), amount);\n\n        meta.balance\n    }\n\n    /// Deduct balance for an API call. Callable by authorized caller (e.g. backend).\n    /// Amount must not exceed max single deduct (see init / get_max_deduct).\n    /// If revenue pool is set, USDC is transferred to it; otherwise it remains in the vault.\n    /// Emits a \"deduct\" event with caller, optional request_id, amount, and new balance.\n    pub fn deduct(env: Env, caller: Address, amount: i128, request_id: Option\u003cSymbol\u003e) -\u003e i128 {\n        caller.require_auth();\n        let max_deduct = Self::get_max_deduct(env.clone());\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(amount \u003c= max_deduct, \"deduct amount exceeds max_deduct\");\n\n        let mut meta = Self::get_meta(env.clone());\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        let topics = match \u0026request_id {\n            Some(rid) =\u003e (Symbol::new(\u0026env, \"deduct\"), caller.clone(), rid.clone()),\n            None =\u003e (\n                Symbol::new(\u0026env, \"deduct\"),\n                caller.clone(),\n                Symbol::new(\u0026env, \"\"),\n            ),\n        };\n        env.events().publish(topics, (amount, meta.balance));\n        meta.balance\n    }\n\n    /// Batch deduct: multiple (amount, optional request_id) in one transaction.\n    /// Each amount must not exceed max_deduct. Reverts entire batch if any check fails.\n    /// If revenue pool is set, total deducted USDC is transferred to it once.\n    /// Emits one \"deduct\" event per item.\n    pub fn batch_deduct(env: Env, caller: Address, items: Vec\u003cDeductItem\u003e) -\u003e i128 {\n        caller.require_auth();\n        let max_deduct = Self::get_max_deduct(env.clone());\n        let mut meta = Self::get_meta(env.clone());\n        let n = items.len();\n        assert!(n \u003e 0, \"batch_deduct requires at least one item\");\n\n        let mut running = meta.balance;\n        for item in items.iter() {\n            assert!(item.amount \u003e 0, \"amount must be positive\");\n            let within_limit = item.amount \u003c= max_deduct;\n            assert!(within_limit, \"deduct amount exceeds max_deduct\");\n            assert!(running \u003e= item.amount, \"insufficient balance\");\n            running -= item.amount;\n        }\n\n        let mut balance = meta.balance;\n        for item in items.iter() {\n            balance -= item.amount;\n            let topics = match \u0026item.request_id {\n                Some(rid) =\u003e (Symbol::new(\u0026env, \"deduct\"), caller.clone(), rid.clone()),\n                None =\u003e (\n                    Symbol::new(\u0026env, \"deduct\"),\n                    caller.clone(),\n                    Symbol::new(\u0026env, \"\"),\n                ),\n            };\n            env.events().publish(topics, (item.amount, balance));\n        }\n\n        meta.balance = balance;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n        meta.balance\n    }\n\n    /// Withdraw from vault. Callable only by the vault owner; reduces balance and transfers USDC to owner.\n    pub fn withdraw(env: Env, amount: i128) -\u003e i128 {\n        let mut meta = Self::get_meta(env.clone());\n        meta.owner.require_auth();\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer(\u0026env.current_contract_address(), \u0026meta.owner, \u0026amount);\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events().publish(\n            (Symbol::new(\u0026env, \"withdraw\"), meta.owner.clone()),\n            (amount, meta.balance),\n        );\n        meta.balance\n    }\n\n    /// Withdraw from vault to a designated address. Owner-only; transfers USDC to `to`.\n    pub fn withdraw_to(env: Env, to: Address, amount: i128) -\u003e i128 {\n        let mut meta = Self::get_meta(env.clone());\n        meta.owner.require_auth();\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer(\u0026env.current_contract_address(), \u0026to, \u0026amount);\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events().publish(\n            (\n                Symbol::new(\u0026env, \"withdraw_to\"),\n                meta.owner.clone(),\n                to.clone(),\n            ),\n            (amount, meta.balance),\n        );\n        meta.balance\n    }\n\n    /// Return current balance.\n    pub fn balance(env: Env) -\u003e i128 {\n        Self::get_meta(env).balance\n    }\n}\n\n#[cfg(test)]\nmod 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crate std;\n\nuse super::*;\nuse soroban_sdk::testutils::{Address as _, Events as _};\nuse soroban_sdk::{token, IntoVal, Symbol};\n\nfn create_usdc\u003c'a\u003e(\n    env: \u0026'a Env,\n    admin: \u0026Address,\n) -\u003e (Address, token::Client\u003c'a\u003e, token::StellarAssetClient\u003c'a\u003e) {\n    let contract_address = env.register_stellar_asset_contract_v2(admin.clone());\n    let address = contract_address.address();\n    let client = token::Client::new(env, \u0026address);\n    let admin_client = token::StellarAssetClient::new(env, \u0026address);\n    (address, client, admin_client)\n}\n\nfn create_vault(env: \u0026Env) -\u003e (Address, CalloraVaultClient\u003c'_\u003e) {\n    let address = env.register(CalloraVault, ());\n    let client = CalloraVaultClient::new(env, \u0026address);\n    (address, client)\n}\n\nfn fund_vault(\n    usdc_admin_client: \u0026token::StellarAssetClient,\n    vault_address: \u0026Address,\n    amount: i128,\n) {\n    usdc_admin_client.mint(vault_address, \u0026amount);\n}\n\n#[test]\nfn vault_full_lifecycle() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    let meta = client.init(\u0026owner, \u0026usdc, \u0026Some(500), \u0026Some(10), \u0026None, \u0026None);\n    assert_eq!(meta.balance, 500);\n    assert_eq!(meta.owner, owner);\n    assert_eq!(client.balance(), 500);\n    assert_eq!(client.get_admin(), owner);\n\n    let depositor = Address::generate(\u0026env);\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    let after_deposit = client.deposit(\u0026depositor, \u0026200);\n    assert_eq!(after_deposit, 700);\n    assert_eq!(client.balance(), 700);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: Some(Symbol::new(\u0026env, \"r1\")),\n        },\n        DeductItem {\n            amount: 50,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 25,\n            request_id: Some(Symbol::new(\u0026env, \"r3\")),\n        },\n    ];\n    let after_batch = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(after_batch, 525);\n    assert_eq!(client.balance(), 525);\n\n    let after_deduct = client.deduct(\u0026caller, \u002625, \u0026Some(Symbol::new(\u0026env, \"r4\")));\n    assert_eq!(after_deduct, 500);\n\n    client.set_admin(\u0026owner, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    let after_withdraw = client.withdraw_to(\u0026recipient, \u0026100);\n    assert_eq!(after_withdraw, 400);\n    assert_eq!(client.balance(), 400);\n\n    let after_withdraw2 = client.withdraw(\u002650);\n    assert_eq!(after_withdraw2, 350);\n    assert_eq!(client.balance(), 350);\n\n    let final_meta = client.get_meta();\n    assert_eq!(final_meta.balance, 350);\n    assert_eq!(final_meta.owner, owner);\n    assert_eq!(final_meta.min_deposit, 10);\n}\n\n#[test]\nfn init_with_balance_emits_event() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n\n    let events = env.as_contract(\u0026contract_id, || {\n        CalloraVault::init(\n            env.clone(),\n            owner.clone(),\n            usdc_token.clone(),\n            Some(1000),\n            None,\n            None,\n            None,\n        );\n        env.events().all()\n    });\n\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    assert_eq!(client.balance(), 1000);\n\n    let last_event = events.last().expect(\"expected at least one event\");\n    assert_eq!(last_event.0, contract_id);\n\n    let topics = \u0026last_event.1;\n    assert_eq!(topics.len(), 2);\n    let topic0: Symbol = topics.get(0).unwrap().into_val(\u0026env);\n    let topic1: Address = topics.get(1).unwrap().into_val(\u0026env);\n    assert_eq!(topic0, Symbol::new(\u0026env, \"init\"));\n    assert_eq!(topic1, owner);\n\n    let data: i128 = last_event.2.into_val(\u0026env);\n    assert_eq!(data, 1000);\n}\n\n#[test]\nfn init_defaults_balance_to_zero() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\nfn get_meta_returns_owner_and_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n    let meta = client.get_meta();\n\n    assert_eq!(meta.owner, owner);\n    assert_eq!(meta.balance, 500);\n}\n\n#[test]\nfn get_meta_before_init_fails() {\n    let env = Env::default();\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n\n    let result = client.try_get_meta();\n    assert!(\n        result.is_err(),\n        \"expected error when vault is uninitialised\"\n    );\n}\n\n#[test]\nfn deposit_and_balance_match() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    let returned = client.deposit(\u0026depositor, \u0026200);\n\n    assert_eq!(\n        returned, 300,\n        \"deposit should return the new running balance\"\n    );\n    assert_eq!(client.balance(), 300);\n}\n\n#[test]\nfn deduct_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    client.deposit(\u0026depositor, \u0026200);\n    assert_eq!(client.balance(), 300);\n\n    let returned = client.deduct(\u0026caller, \u002650, \u0026None);\n    assert_eq!(returned, 250, \"deduct should return the remaining balance\");\n    assert_eq!(client.balance(), 250);\n}\n\n#[test]\nfn deduct_with_request_id() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let request_id = Symbol::new(\u0026env, \"req123\");\n    let remaining = client.deduct(\u0026caller, \u0026100, \u0026Some(request_id));\n    assert_eq!(remaining, 900);\n}\n\n#[test]\nfn deduct_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 10);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(10), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_deduct(\u0026caller, \u0026100, \u0026None);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn deduct_exact_balance_succeeds() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 75);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(75), \u0026None, \u0026None, \u0026None);\n    let remaining = client.deduct(\u0026caller, \u002675, \u0026None);\n\n    assert_eq!(remaining, 0);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\nfn deduct_event_contains_request_id() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let request_id = Symbol::new(\u0026env, \"api_call_42\");\n    client.deduct(\u0026caller, \u0026150, \u0026Some(request_id.clone()));\n\n    let events = env.events().all();\n    let ev = events.last().expect(\"expected deduct event\");\n\n    let topic0: Symbol = ev.1.get(0).unwrap().into_val(\u0026env);\n    let topic1: Address = ev.1.get(1).unwrap().into_val(\u0026env);\n    let topic2: Symbol = ev.1.get(2).unwrap().into_val(\u0026env);\n\n    assert_eq!(topic0, Symbol::new(\u0026env, \"deduct\"));\n    assert_eq!(topic1, caller);\n    assert_eq!(topic2, request_id);\n\n    let (emitted_amount, remaining): (i128, i128) = ev.2.into_val(\u0026env);\n    assert_eq!(emitted_amount, 150);\n    assert_eq!(remaining, 350);\n}\n\n#[test]\nfn deduct_event_no_request_id_uses_empty_symbol() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 300);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(300), \u0026None, \u0026None, \u0026None);\n    client.deduct(\u0026caller, \u0026100, \u0026None);\n\n    let events = env.events().all();\n    let ev = events.last().expect(\"expected deduct event\");\n\n    let topic0: Symbol = ev.1.get(0).unwrap().into_val(\u0026env);\n    let topic2: Symbol = ev.1.get(2).unwrap().into_val(\u0026env);\n\n    assert_eq!(topic0, Symbol::new(\u0026env, \"deduct\"));\n    assert_eq!(topic2, Symbol::new(\u0026env, \"\"));\n}\n\n#[test]\nfn batch_deduct_events_contain_request_ids() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let rid_a = Symbol::new(\u0026env, \"batch_a\");\n    let rid_b = Symbol::new(\u0026env, \"batch_b\");\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 200,\n            request_id: Some(rid_a.clone()),\n        },\n        DeductItem {\n            amount: 300,\n            request_id: Some(rid_b.clone()),\n        },\n    ];\n    client.batch_deduct(\u0026caller, \u0026items);\n\n    let all_events = env.events().all();\n    assert_eq!(all_events.len(), 2);\n\n    let ev_a = all_events.get(0).unwrap();\n    let ev_b = all_events.get(1).unwrap();\n\n    let req_a: Symbol = ev_a.1.get(2).unwrap().into_val(\u0026env);\n    let req_b: Symbol = ev_b.1.get(2).unwrap().into_val(\u0026env);\n    assert_eq!(req_a, rid_a);\n    assert_eq!(req_b, rid_b);\n\n    let (amt_a, _): (i128, i128) = ev_a.2.into_val(\u0026env);\n    let (amt_b, _): (i128, i128) = ev_b.2.into_val(\u0026env);\n    assert_eq!(amt_a, 200);\n    assert_eq!(amt_b, 300);\n}\n\n#[test]\nfn get_admin_returns_correct_address() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let admin = client.get_admin();\n    assert_eq!(admin, owner);\n}\n\n#[test]\nfn set_admin_updates_admin() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    client.set_admin(\u0026owner, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n}\n\n#[test]\nfn set_admin_unauthorized_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let intruder = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_set_admin(\u0026intruder, \u0026new_admin);\n    assert!(\n        result.is_err(),\n        \"expected error when non-admin tries to set admin\"\n    );\n}\n\n#[test]\nfn distribute_transfers_usdc_to_developer() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, usdc_client, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    client.distribute(\u0026admin, \u0026developer, \u0026300);\n\n    assert_eq!(usdc_client.balance(\u0026developer), 300);\n    assert_eq!(usdc_client.balance(\u0026vault_address), 700);\n}\n\n#[test]\nfn distribute_unauthorized_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let intruder = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026intruder, \u0026developer, \u0026300);\n    assert!(\n        result.is_err(),\n        \"expected error when non-admin tries to distribute\"\n    );\n}\n\n#[test]\nfn distribute_insufficient_usdc_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 100);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026admin, \u0026developer, \u0026500);\n    assert!(\n        result.is_err(),\n        \"expected error for insufficient USDC balance\"\n    );\n}\n\n#[test]\nfn distribute_zero_amount_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026admin, \u0026developer, \u00260);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn batch_deduct_multiple_items() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: Some(Symbol::new(\u0026env, \"req1\"))\n        },\n        DeductItem {\n            amount: 200,\n            request_id: None\n        },\n        DeductItem {\n            amount: 50,\n            request_id: Some(Symbol::new(\u0026env, \"req2\"))\n        }\n    ];\n\n    let remaining = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(remaining, 650);\n    assert_eq!(client.balance(), 650);\n}\n\n#[test]\nfn batch_deduct_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 50,\n            request_id: None\n        },\n        DeductItem {\n            amount: 80,\n            request_id: None\n        }\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for batch overdraw\");\n    assert_eq!(client.balance(), 100);\n}\n\n#[test]\nfn batch_deduct_empty_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items: soroban_sdk::Vec\u003cDeductItem\u003e = soroban_sdk::vec![\u0026env];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for empty batch\");\n}\n\n#[test]\nfn batch_deduct_zero_amount_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 0,\n            request_id: None\n        }\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn withdraw_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let remaining = client.withdraw(\u0026200);\n    assert_eq!(remaining, 300);\n    assert_eq!(client.balance(), 300);\n}\n\n#[test]\nfn withdraw_insufficient_balance_fails() {\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw(\u0026500);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn withdraw_zero_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw(\u00260);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn withdraw_to_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let remaining = client.withdraw_to(\u0026recipient, \u0026150);\n    assert_eq!(remaining, 350);\n    assert_eq!(client.balance(), 350);\n}\n\n#[test]\nfn withdraw_to_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw_to(\u0026recipient, \u0026500);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn deposit_below_minimum_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026Some(50), \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 30);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u002630, \u00261000);\n    let result = client.try_deposit(\u0026depositor, \u002630);\n    assert!(result.is_err(), \"expected error for deposit below minimum\");\n}\n\n#[test]\nfn deposit_at_minimum_succeeds() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026Some(50), \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 50);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u002650, \u00261000);\n    let new_balance = client.deposit(\u0026depositor, \u002650);\n    assert_eq!(new_balance, 150);\n}\n\n#[test]\nfn double_init_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026Some(200), \u0026None, \u0026None, \u0026None);\n    assert!(result.is_err(), \"expected error for double init\");\n}\n\n#[test]\nfn init_insufficient_usdc_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 50);\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    assert!(\n        result.is_err(),\n        \"expected error when initial_balance exceeds contract USDC\"\n    );\n}\n\n#[test]\nfn init_with_zero_max_deduct_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026Some(0));\n    assert!(result.is_err(), \"expected error for max_deduct \u003c= 0\");\n}\n\n#[test]\nfn init_with_revenue_pool_and_get_revenue_pool() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let revenue_pool = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\n        \u0026owner,\n        \u0026usdc_token,\n        \u0026None,\n        \u0026None,\n        \u0026Some(revenue_pool.clone()),\n        \u0026None,\n    );\n\n    let retrieved_pool = client.get_revenue_pool();\n    assert_eq!(retrieved_pool, Some(revenue_pool));\n}\n\n#[test]\nfn get_revenue_pool_returns_none_when_not_set() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026None);\n\n    let retrieved_pool = client.get_revenue_pool();\n    assert_eq!(retrieved_pool, None);\n}\n\n#[test]\nfn get_max_deduct_returns_configured_value() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026Some(5000));\n\n    let max_deduct = client.get_max_deduct();\n    assert_eq!(max_deduct, 5000);\n}\n\n/// Fuzz test: random deposit/deduct sequence asserting balance \u003e= 0 and matches expected.\n/// Run with: cargo test --package callora-vault fuzz_deposit_and_deduct -- --nocapture\n#[test]\nfn fuzz_deposit_and_deduct() {\n    use rand::Rng;\n\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    let initial_balance: i128 = 1_000;\n    fund_vault(\u0026usdc_admin, \u0026vault_address, initial_balance);\n    // Pre-fund owner for deposits in the loop\n    usdc_admin.mint(\u0026owner, \u0026250_000);\n    usdc_client.approve(\u0026owner, \u0026vault_address, \u0026250_000, \u002610_000);\n    vault.init(\n        \u0026owner,\n        \u0026usdc_address,\n        \u0026Some(initial_balance),\n        \u0026None,\n        \u0026None,\n        \u0026None,\n    );\n    let mut expected = initial_balance;\n    let mut rng = rand::thread_rng();\n\n    for _ in 0..500 {\n        if rng.gen_bool(0.5) {\n            let amount = rng.gen_range(1..=500);\n            vault.deposit(\u0026owner, \u0026amount);\n            expected += amount;\n        } else if expected \u003e 0 {\n            let amount = rng.gen_range(1..=expected.min(500));\n            vault.deduct(\u0026owner, \u0026amount, \u0026None);\n            expected -= amount;\n        }\n\n        let balance = vault.balance();\n        assert!(balance \u003e= 0, \"balance went negative: {}\", balance);\n        assert_eq!(\n            balance, expected,\n            \"balance mismatch: got {}, expected {}\",\n            balance, expected\n        );\n    }\n\n    assert_eq!(vault.balance(), expected);\n}\n\n#[test]\nfn deduct_returns_new_balance() {\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    fund_vault(\u0026usdc_admin, \u0026vault_address, 100);\n    vault.init(\u0026owner, \u0026usdc_address, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    let new_balance = vault.deduct(\u0026owner, \u002630, \u0026None);\n    assert_eq!(new_balance, 70);\n    assert_eq!(vault.balance(), 70);\n}\n\n/// Fuzz test (seeded): deterministic deposit/deduct sequence asserting balance \u003e= 0 and matches expected.\n#[test]\nfn fuzz_deposit_and_deduct_seeded() {\n    use rand::rngs::StdRng;\n    use rand::{Rng, SeedableRng};\n\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    // Pre-fund owner for deposits in the loop\n    usdc_admin.mint(\u0026owner, \u00265_000_000);\n    usdc_client.approve(\u0026owner, \u0026vault_address, \u00265_000_000, \u002610_000);\n    vault.init(\u0026owner, \u0026usdc_address, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n    let mut expected: i128 = 0;\n    let mut rng = StdRng::seed_from_u64(42);\n\n    for _ in 0..500 {\n        let action: u8 = rng.gen_range(0..2);\n\n        if action == 0 {\n            let amount: i128 = rng.gen_range(1..=10_000);\n            vault.deposit(\u0026owner, \u0026amount);\n            expected += amount;\n        } else if expected \u003e 0 {\n            let amount: i128 = rng.gen_range(1..=expected);\n            vault.deduct(\u0026owner, \u0026amount, \u0026None);\n            expected -= amount;\n        }\n\n        assert!(expected \u003e= 0, \"balance went negative\");\n        assert_eq!(vault.balance(), expected, \"balance mismatch at iteration\");\n    }\n}\n\n#[test]\nfn batch_deduct_all_succeed() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 60);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(60), \u0026None, \u0026None, \u0026None);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n    let new_balance = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(new_balance, 0);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient balance\")]\nfn batch_deduct_all_revert() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 25);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(25), \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 25);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n    client.batch_deduct(\u0026caller, \u0026items);\n}\n\n#[test]\nfn batch_deduct_revert_preserves_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 25);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(25), \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 25);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n\n    let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {\n        client.batch_deduct(\u0026caller, \u0026items);\n    }));\n\n    assert!(result.is_err());\n    assert_eq!(client.balance(), 25);\n}\n\n#[test]\nfn owner_unchanged_after_deposit_and_deduct() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    // Fund owner for the deposit call\n    usdc_admin.mint(\u0026owner, \u002650);\n    usdc_client.approve(\u0026owner, \u0026contract_id, \u002650, \u002610_000);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    client.deposit(\u0026owner, \u002650);\n    client.deduct(\u0026owner, \u002630, \u0026None);\n\n    assert_eq!(client.get_meta().owner, owner);\n}\n","traces":[{"line":7,"address":[11180149,11180143,11179680],"length":1,"stats":{"Line":1}},{"line":11,"address":[],"length":0,"stats":{"Line":1}},{"line":12,"address":[],"length":0,"stats":{"Line":1}},{"line":13,"address":[],"length":0,"stats":{"Line":15}},{"line":14,"address":[],"length":0,"stats":{"Line":1}},{"line":15,"address":[],"length":0,"stats":{"Line":10}},{"line":18,"address":[11180361,11180367,11180176],"length":1,"stats":{"Line":1}},{"line":19,"address":[11180215],"length":1,"stats":{"Line":1}},{"line":20,"address":[11180235],"length":1,"stats":{"Line":1}},{"line":21,"address":[11180280],"length":1,"stats":{"Line":1}},{"line":24,"address":[11179632],"length":1,"stats":{"Line":11}},{"line":29,"address":[11179655],"length":1,"stats":{"Line":1}}],"covered":12,"coverable":12}]};
+        var previousData = {"files":[{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","contracts","revenue_pool","src","lib.rs"],"content":"#![no_std]\n\nuse soroban_sdk::{contract, contractimpl, token, Address, Env, Symbol, Vec};\n\n/// Revenue settlement contract: receives USDC from vault deducts and distributes to developers.\n///\n/// Flow: vault deduct → vault transfers USDC to this contract → admin calls distribute(to, amount).\nconst ADMIN_KEY: \u0026str = \"admin\";\nconst USDC_KEY: \u0026str = \"usdc\";\n\n#[contract]\npub struct RevenuePool;\n\n#[contractimpl]\nimpl RevenuePool {\n    /// Initialize the revenue pool with an admin and the USDC token address.\n    ///\n    /// # Arguments\n    /// * `admin` – Address that may call `distribute`. Typically backend or multisig.\n    /// * `usdc_token` – Stellar USDC (or wrapped USDC) token contract address.\n    pub fn init(env: Env, admin: Address, usdc_token: Address) {\n        admin.require_auth();\n        let inst = env.storage().instance();\n        if inst.has(\u0026Symbol::new(\u0026env, ADMIN_KEY)) {\n            panic!(\"revenue pool already initialized\");\n        }\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026admin);\n        inst.set(\u0026Symbol::new(\u0026env, USDC_KEY), \u0026usdc_token);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"init\"), admin), usdc_token);\n    }\n\n    /// Return the current admin address.\n    pub fn get_admin(env: Env) -\u003e Address {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, ADMIN_KEY))\n            .expect(\"revenue pool not initialized\")\n    }\n\n    /// Replace the current admin. Only the existing admin may call this.\n    pub fn set_admin(env: Env, caller: Address, new_admin: Address) {\n        caller.require_auth();\n        let current = Self::get_admin(env.clone());\n        if caller != current {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026new_admin);\n    }\n\n    /// Placeholder: record that payment was received (e.g. from vault).\n    /// In practice, USDC is received when the vault (or any address) transfers tokens\n    /// to this contract's address; no separate \"receive\" call is required.\n    ///\n    /// This function can be used to emit an event for indexers when the backend\n    /// wants to log that a payment was credited from the vault.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be admin (or could be extended to allow vault to call).\n    /// * `amount` – Amount received (for event logging).\n    /// * `from_vault` – Optional; true if the source was the vault.\n    pub fn receive_payment(env: Env, caller: Address, amount: i128, from_vault: bool) {\n        caller.require_auth();\n        let _admin = Self::get_admin(env.clone());\n        env.events().publish(\n            (Symbol::new(\u0026env, \"receive_payment\"), caller),\n            (amount, from_vault),\n        );\n    }\n\n    /// Distribute USDC from this contract to a developer wallet.\n    ///\n    /// Only the admin may call. Transfers USDC from this contract to `to`.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be the current admin.\n    /// * `to` – Developer address to receive USDC.\n    /// * `amount` – Amount in token base units (e.g. USDC stroops).\n    pub fn distribute(env: Env, caller: Address, to: Address, amount: i128) {\n        caller.require_auth();\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        if amount \u003c= 0 {\n            panic!(\"amount must be positive\");\n        }\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"revenue pool not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        let contract_address = env.current_contract_address();\n        if usdc.balance(\u0026contract_address) \u003c amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        usdc.transfer(\u0026contract_address, \u0026to, \u0026amount);\n        env.events()\n            .publish((Symbol::new(\u0026env, \"distribute\"), to), amount);\n    }\n\n    /// Distribute USDC from this contract to multiple developer wallets in one transaction.\n    ///\n    /// Only the admin may call. Iterates through the vector of payments and atomically\n    /// transfers USDC to each developer. Fails if the total amount exceeds balance\n    /// or if any individual amount is not positive.\n    ///\n    /// # Arguments\n    /// * `caller` - Must be the current admin.\n    /// * `payments` - A vector of (Address, amount) tuples.\n    pub fn batch_distribute(env: Env, caller: Address, payments: Vec\u003c(Address, i128)\u003e) {\n        caller.require_auth();\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n\n        let mut total_amount: i128 = 0;\n        for payment in payments.iter() {\n            let (_, amount) = payment;\n            if amount \u003c= 0 {\n                panic!(\"amount must be positive\");\n            }\n            total_amount += amount;\n        }\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"revenue pool not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        let contract_address = env.current_contract_address();\n        if usdc.balance(\u0026contract_address) \u003c total_amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        for payment in payments.iter() {\n            let (to, amount) = payment;\n            usdc.transfer(\u0026contract_address, \u0026to, \u0026amount);\n            env.events()\n                .publish((Symbol::new(\u0026env, \"batch_distribute\"), to), amount);\n        }\n    }\n\n    /// Return this contract's USDC balance (for testing and dashboards).\n    pub fn balance(env: Env) -\u003e i128 {\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"revenue pool not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.balance(\u0026env.current_contract_address())\n    }\n}\n\n#[cfg(test)]\nmod test;\n","traces":[{"line":21,"address":[10909392,10910421,10910544],"length":1,"stats":{"Line":5}},{"line":22,"address":[10909427],"length":1,"stats":{"Line":4}},{"line":23,"address":[10909521],"length":1,"stats":{"Line":9}},{"line":24,"address":[10909649],"length":1,"stats":{"Line":3}},{"line":25,"address":[10910427],"length":1,"stats":{"Line":1}},{"line":27,"address":[10909801],"length":1,"stats":{"Line":9}},{"line":28,"address":[10909925],"length":1,"stats":{"Line":4}},{"line":30,"address":[10910057],"length":1,"stats":{"Line":9}},{"line":31,"address":[10910069],"length":1,"stats":{"Line":4}},{"line":35,"address":[10911408,10911789],"length":1,"stats":{"Line":1}},{"line":36,"address":[10911434],"length":1,"stats":{"Line":1}},{"line":38,"address":[10911544,10911631],"length":1,"stats":{"Line":2}},{"line":43,"address":[10911808,10912474,10912510],"length":1,"stats":{"Line":2}},{"line":44,"address":[10911843],"length":1,"stats":{"Line":1}},{"line":45,"address":[10911905],"length":1,"stats":{"Line":1}},{"line":46,"address":[10911996,10911934],"length":1,"stats":{"Line":2}},{"line":47,"address":[10912022,10912490],"length":1,"stats":{"Line":2}},{"line":49,"address":[10912054,10912015],"length":1,"stats":{"Line":2}},{"line":50,"address":[10912193],"length":1,"stats":{"Line":1}},{"line":64,"address":[10906032,10906579,10906617],"length":1,"stats":{"Line":1}},{"line":65,"address":[10906099],"length":1,"stats":{"Line":1}},{"line":66,"address":[10906177],"length":1,"stats":{"Line":1}},{"line":67,"address":[10906214,10906494],"length":1,"stats":{"Line":2}},{"line":68,"address":[10906355,10906264],"length":1,"stats":{"Line":2}},{"line":81,"address":[10905984,10904368,10905858],"length":1,"stats":{"Line":3}},{"line":82,"address":[10904408],"length":1,"stats":{"Line":1}},{"line":83,"address":[10904489],"length":1,"stats":{"Line":1}},{"line":84,"address":[10904583,10904521],"length":1,"stats":{"Line":3}},{"line":85,"address":[10905931,10904611],"length":1,"stats":{"Line":2}},{"line":87,"address":[10904589],"length":1,"stats":{"Line":2}},{"line":88,"address":[10904663,10905903],"length":1,"stats":{"Line":2}},{"line":94,"address":[10904867,10904771],"length":1,"stats":{"Line":3}},{"line":96,"address":[10905145],"length":1,"stats":{"Line":2}},{"line":98,"address":[10905177],"length":1,"stats":{"Line":1}},{"line":99,"address":[10905325,10905237],"length":1,"stats":{"Line":3}},{"line":100,"address":[10905382,10905873],"length":1,"stats":{"Line":2}},{"line":103,"address":[10905350],"length":1,"stats":{"Line":1}},{"line":104,"address":[10905657,10905426],"length":1,"stats":{"Line":2}},{"line":105,"address":[10905683,10905438],"length":1,"stats":{"Line":3}},{"line":117,"address":[10909176,10906640,10908873],"length":1,"stats":{"Line":4}},{"line":118,"address":[10906678],"length":1,"stats":{"Line":1}},{"line":119,"address":[10906750],"length":1,"stats":{"Line":1}},{"line":120,"address":[10906785,10906856],"length":1,"stats":{"Line":4}},{"line":121,"address":[10909155,10906909],"length":1,"stats":{"Line":2}},{"line":124,"address":[10906870],"length":1,"stats":{"Line":1}},{"line":125,"address":[10907053,10906902,10906957],"length":1,"stats":{"Line":5}},{"line":126,"address":[10907144],"length":1,"stats":{"Line":2}},{"line":127,"address":[10907186],"length":1,"stats":{"Line":2}},{"line":128,"address":[10909124,10908982],"length":1,"stats":{"Line":2}},{"line":130,"address":[10909054,10909020,10908941],"length":1,"stats":{"Line":2}},{"line":136,"address":[10907316,10907412],"length":1,"stats":{"Line":2}},{"line":138,"address":[10907690],"length":1,"stats":{"Line":1}},{"line":140,"address":[10907722],"length":1,"stats":{"Line":1}},{"line":141,"address":[10907782,10907870],"length":1,"stats":{"Line":3}},{"line":142,"address":[10908911,10907919],"length":1,"stats":{"Line":2}},{"line":145,"address":[10908868,10907912,10907967,10908063],"length":1,"stats":{"Line":4}},{"line":146,"address":[10908158],"length":1,"stats":{"Line":1}},{"line":147,"address":[10908246],"length":1,"stats":{"Line":1}},{"line":148,"address":[10908566,10908802],"length":1,"stats":{"Line":2}},{"line":149,"address":[10908578,10908834],"length":1,"stats":{"Line":2}},{"line":154,"address":[10911384,10910560],"length":1,"stats":{"Line":2}},{"line":158,"address":[10910701,10910788],"length":1,"stats":{"Line":3}},{"line":160,"address":[10911051],"length":1,"stats":{"Line":1}},{"line":161,"address":[10911140,10911080],"length":1,"stats":{"Line":2}}],"covered":64,"coverable":64},{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","contracts","revenue_pool","src","test.rs"],"content":"extern crate std;\n\nuse super::*;\nuse soroban_sdk::testutils::{Address as _, Events as _};\nuse soroban_sdk::token;\n\nfn create_usdc\u003c'a\u003e(\n    env: \u0026'a Env,\n    admin: \u0026Address,\n) -\u003e (Address, token::Client\u003c'a\u003e, token::StellarAssetClient\u003c'a\u003e) {\n    let contract_address = env.register_stellar_asset_contract_v2(admin.clone());\n    let address = contract_address.address();\n    let client = token::Client::new(env, \u0026address);\n    let admin_client = token::StellarAssetClient::new(env, \u0026address);\n    (address, client, admin_client)\n}\n\nfn create_pool(env: \u0026Env) -\u003e (Address, RevenuePoolClient\u003c'_\u003e) {\n    let address = env.register(RevenuePool, ());\n    let client = RevenuePoolClient::new(env, \u0026address);\n    (address, client)\n}\n\nfn fund_pool(usdc_admin_client: \u0026token::StellarAssetClient, pool_address: \u0026Address, amount: i128) {\n    usdc_admin_client.mint(pool_address, \u0026amount);\n}\n\n#[test]\nfn init_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_pool_addr, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    assert_eq!(client.get_admin(), admin);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\n#[should_panic(expected = \"revenue pool already initialized\")]\nfn init_double_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.init(\u0026admin, \u0026usdc);\n}\n\n#[test]\nfn distribute_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1_000);\n    client.distribute(\u0026admin, \u0026developer, \u0026400);\n\n    assert_eq!(usdc_client.balance(\u0026pool_addr), 600);\n    assert_eq!(usdc_client.balance(\u0026developer), 400);\n}\n\n#[test]\n#[should_panic(expected = \"amount must be positive\")]\nfn distribute_zero_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.distribute(\u0026admin, \u0026developer, \u00260);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient USDC balance\")]\nfn distribute_excess_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 100);\n    client.distribute(\u0026admin, \u0026developer, \u0026101);\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn distribute_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n    client.distribute(\u0026attacker, \u0026developer, \u0026100);\n}\n\n#[test]\nfn set_admin_transfers_control() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 300);\n    client.set_admin(\u0026admin, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    client.distribute(\u0026new_admin, \u0026developer, \u0026100);\n    assert_eq!(usdc_client.balance(\u0026developer), 100);\n}\n\n#[test]\nfn receive_payment_emits_event() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.receive_payment(\u0026admin, \u0026500, \u0026true);\n    let events = env.events().all();\n    assert!(!events.is_empty());\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn set_admin_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.set_admin(\u0026attacker, \u0026new_admin);\n}\n\n#[test]\n#[should_panic(expected = \"revenue pool not initialized\")]\nfn balance_before_init_panics() {\n    let env = Env::default();\n    let (_, client) = create_pool(\u0026env);\n    client.balance();\n}\n\n#[test]\nfn distribute_negative_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {\n        client.distribute(\u0026admin, \u0026developer, \u0026-1);\n    }));\n    assert!(result.is_err());\n}\n\n#[test]\nfn receive_payment_from_non_vault() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.receive_payment(\u0026admin, \u0026250, \u0026false);\n\n    let events = env.events().all();\n    assert!(!events.is_empty());\n}\n\n/// Full lifecycle test: init, get_admin, balance, distribute, receive_payment, set_admin.\n#[test]\nfn full_lifecycle() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    // Init\n    client.init(\u0026admin, \u0026usdc_address);\n    assert_eq!(client.get_admin(), admin);\n\n    // Fund and check balance\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1000);\n    assert_eq!(client.balance(), 1000);\n\n    // Distribute\n    client.distribute(\u0026admin, \u0026developer, \u0026400);\n    assert_eq!(usdc_client.balance(\u0026developer), 400);\n    assert_eq!(client.balance(), 600);\n\n    // Receive payment event\n    client.receive_payment(\u0026admin, \u0026100, \u0026true);\n\n    // Set admin\n    client.set_admin(\u0026admin, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    // New admin can distribute\n    client.distribute(\u0026new_admin, \u0026developer, \u0026100);\n    assert_eq!(usdc_client.balance(\u0026developer), 500);\n    assert_eq!(client.balance(), 500);\n}\n\n#[test]\nfn get_admin_before_init_fails() {\n    let env = Env::default();\n    let (_, client) = create_pool(\u0026env);\n    let result = client.try_get_admin();\n    assert!(result.is_err(), \"expected error when pool not initialized\");\n}\n\n#[test]\nfn balance_before_init_fails() {\n    let env = Env::default();\n    let (_, client) = create_pool(\u0026env);\n    let result = client.try_balance();\n    assert!(result.is_err(), \"expected error when pool not initialized\");\n}\n\n#[test]\nfn set_admin_unauthorized_fails() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let intruder = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    let result = client.try_set_admin(\u0026intruder, \u0026new_admin);\n    assert!(result.is_err(), \"expected error for unauthorized set_admin\");\n}\n\n#[test]\nfn batch_distribute_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev1 = Address::generate(\u0026env);\n    let dev2 = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1_000);\n\n    let payments = soroban_sdk::vec![\u0026env, (dev1.clone(), 300_i128), (dev2.clone(), 200_i128)];\n    client.batch_distribute(\u0026admin, \u0026payments);\n\n    assert_eq!(usdc_client.balance(\u0026dev1), 300);\n    assert_eq!(usdc_client.balance(\u0026dev2), 200);\n    assert_eq!(usdc_client.balance(\u0026pool_addr), 500);\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn batch_distribute_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n\n    let payments = soroban_sdk::vec![\u0026env, (dev.clone(), 100_i128)];\n    client.batch_distribute(\u0026attacker, \u0026payments);\n}\n\n#[test]\n#[should_panic(expected = \"amount must be positive\")]\nfn batch_distribute_zero_amount_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n\n    let payments = soroban_sdk::vec![\u0026env, (dev.clone(), 0_i128)];\n    client.batch_distribute(\u0026admin, \u0026payments);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient USDC balance\")]\nfn batch_distribute_insufficient_balance_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 100);\n\n    let payments = soroban_sdk::vec![\u0026env, (dev.clone(), 200_i128)];\n    client.batch_distribute(\u0026admin, \u0026payments);\n}\n","traces":[{"line":7,"address":[10947311,10947317,10946848],"length":1,"stats":{"Line":13}},{"line":11,"address":[10946910],"length":1,"stats":{"Line":13}},{"line":12,"address":[10946949],"length":1,"stats":{"Line":13}},{"line":13,"address":[10947014],"length":1,"stats":{"Line":13}},{"line":14,"address":[10947087],"length":1,"stats":{"Line":4}},{"line":15,"address":[10947155],"length":1,"stats":{"Line":2}},{"line":18,"address":[10946825,10946640,10946831],"length":1,"stats":{"Line":1}},{"line":19,"address":[10946679],"length":1,"stats":{"Line":1}},{"line":20,"address":[10946699],"length":1,"stats":{"Line":1}},{"line":21,"address":[10946744],"length":1,"stats":{"Line":16}},{"line":24,"address":[10969872],"length":1,"stats":{"Line":6}},{"line":25,"address":[10969895],"length":1,"stats":{"Line":2}}],"covered":12,"coverable":12},{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","contracts","vault","src","lib.rs"],"content":"#![no_std]\n\nuse soroban_sdk::{contract, contractimpl, contracttype, token, Address, Env, Symbol, Vec};\n\n/// Single item for batch deduct: amount and optional request id for idempotency/tracking.\n#[contracttype]\n#[derive(Clone)]\npub struct DeductItem {\n    pub amount: i128,\n    pub request_id: Option\u003cSymbol\u003e,\n}\n\n#[contracttype]\n#[derive(Clone)]\npub struct VaultMeta {\n    pub owner: Address,\n    pub balance: i128,\n    /// Minimum amount required per deposit; deposits below this panic.\n    pub min_deposit: i128,\n}\n\nconst META_KEY: \u0026str = \"meta\";\nconst USDC_KEY: \u0026str = \"usdc\";\nconst ADMIN_KEY: \u0026str = \"admin\";\nconst REVENUE_POOL_KEY: \u0026str = \"revenue_pool\";\nconst MAX_DEDUCT_KEY: \u0026str = \"max_deduct\";\n\n/// Default maximum single deduct amount when not set at init (no cap).\npub const DEFAULT_MAX_DEDUCT: i128 = i128::MAX;\n\n#[contracttype]\n#[derive(Clone, Debug, PartialEq)]\npub struct DistributeEvent {\n    pub to: Address,\n    pub amount: i128,\n}\n\n#[contract]\npub struct CalloraVault;\n\n#[contractimpl]\nimpl CalloraVault {\n    /// Initialize vault for an owner with optional initial balance and minimum deposit.\n    /// If initial_balance \u003e 0, the contract must already hold at least that much USDC (e.g. deployer transferred in first).\n    /// Emits an \"init\" event with the owner address and initial balance.\n    ///\n    /// # Arguments\n    /// * `revenue_pool` – Optional address to receive USDC on each deduct (e.g. settlement contract). If None, USDC stays in vault.\n    /// * `max_deduct` – Optional cap per single deduct; if None, uses DEFAULT_MAX_DEDUCT (no cap).\n    pub fn init(\n        env: Env,\n        owner: Address,\n        usdc_token: Address,\n        initial_balance: Option\u003ci128\u003e,\n        min_deposit: Option\u003ci128\u003e,\n        revenue_pool: Option\u003cAddress\u003e,\n        max_deduct: Option\u003ci128\u003e,\n    ) -\u003e VaultMeta {\n        owner.require_auth();\n        if env.storage().instance().has(\u0026Symbol::new(\u0026env, META_KEY)) {\n            panic!(\"vault already initialized\");\n        }\n        let balance = initial_balance.unwrap_or(0);\n        if balance \u003e 0 {\n            let usdc = token::Client::new(\u0026env, \u0026usdc_token);\n            let contract_balance = usdc.balance(\u0026env.current_contract_address());\n            if contract_balance \u003c balance {\n                panic!(\"insufficient USDC in contract for initial_balance\");\n            }\n        }\n        let min_deposit_val = min_deposit.unwrap_or(0);\n        let max_deduct_val = max_deduct.unwrap_or(DEFAULT_MAX_DEDUCT);\n        if max_deduct_val \u003c= 0 {\n            panic!(\"max_deduct must be positive\");\n        }\n        let meta = VaultMeta {\n            owner: owner.clone(),\n            balance,\n            min_deposit: min_deposit_val,\n        };\n        // Persist metadata under both the literal key and the constant for safety.\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n        inst.set(\u0026Symbol::new(\u0026env, META_KEY), \u0026meta);\n        inst.set(\u0026Symbol::new(\u0026env, USDC_KEY), \u0026usdc_token);\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026owner);\n        if let Some(pool) = revenue_pool {\n            inst.set(\u0026Symbol::new(\u0026env, REVENUE_POOL_KEY), \u0026pool);\n        }\n        inst.set(\u0026Symbol::new(\u0026env, MAX_DEDUCT_KEY), \u0026max_deduct_val);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"init\"), owner), balance);\n\n        meta\n    }\n\n    /// Return the current admin address.\n    pub fn get_admin(env: Env) -\u003e Address {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, ADMIN_KEY))\n            .unwrap_or_else(|| panic!(\"vault not initialized\"))\n    }\n\n    /// Replace the current admin. Only the existing admin may call this.\n    pub fn set_admin(env: Env, caller: Address, new_admin: Address) {\n        caller.require_auth();\n        let current_admin = Self::get_admin(env.clone());\n        if caller != current_admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026new_admin);\n    }\n\n    /// Return the maximum allowed amount for a single deduct (configurable at init).\n    pub fn get_max_deduct(env: Env) -\u003e i128 {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, MAX_DEDUCT_KEY))\n            .unwrap_or_else(|| panic!(\"vault not initialized\"))\n    }\n\n    /// Return the revenue pool address if set (receives USDC on deduct).\n    pub fn get_revenue_pool(env: Env) -\u003e Option\u003cAddress\u003e {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, REVENUE_POOL_KEY))\n            .unwrap_or(None)\n    }\n\n    /// Distribute accumulated USDC to a single developer address.\n    ///\n    /// # Access control\n    /// Only the admin (backend / multisig) may call this.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be the current admin address.\n    /// * `to`     – Developer wallet to receive the USDC.\n    /// * `amount` – Amount in USDC micro-units (must be \u003e 0 and ≤ vault balance).\n    ///\n    /// # Panics\n    /// * `\"unauthorized: caller is not admin\"` – caller is not the admin.\n    /// * `\"amount must be positive\"`           – amount is zero or negative.\n    /// * `\"insufficient USDC balance\"`         – vault holds less than amount.\n    ///\n    /// # Events\n    /// Emits topic `(\"distribute\", to)` with data `amount` on success.\n    pub fn distribute(env: Env, caller: Address, to: Address, amount: i128) {\n        // 1. Require on-chain signature from caller.\n        caller.require_auth();\n\n        // 2. Only the registered admin may distribute.\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n\n        // 3. Amount must be positive.\n        if amount \u003c= 0 {\n            panic!(\"amount must be positive\");\n        }\n\n        // 4. Load the USDC token address.\n        let usdc_opt: Option\u003cAddress\u003e = env.storage().instance().get(\u0026Symbol::new(\u0026env, USDC_KEY));\n        let usdc_address: Address = usdc_opt.unwrap_or_else(|| panic!(\"vault not initialized\"));\n\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        // 5. Check vault has enough USDC.\n        let vault_balance = usdc.balance(\u0026env.current_contract_address());\n        if vault_balance \u003c amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        // 6. Transfer USDC from vault to developer.\n        usdc.transfer(\u0026env.current_contract_address(), \u0026to, \u0026amount);\n\n        // 7. Emit distribute event.\n        env.events()\n            .publish((Symbol::new(\u0026env, \"distribute\"), to), amount);\n    }\n\n    /// Get vault metadata (owner and balance).\n    pub fn get_meta(env: Env) -\u003e VaultMeta {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, META_KEY))\n            .unwrap_or_else(|| panic!(\"vault not initialized\"))\n    }\n\n    /// Deposit: user transfers USDC to the contract; contract increases internal balance.\n    /// Caller must have authorized the transfer (token transfer_from). Supports multiple depositors.\n    /// Emits a \"deposit\" event with the depositor address and amount.\n    pub fn deposit(env: Env, from: Address, amount: i128) -\u003e i128 {\n        from.require_auth();\n\n        let mut meta = Self::get_meta(env.clone());\n        assert!(\n            amount \u003e= meta.min_deposit,\n            \"deposit below minimum: {} \u003c {}\",\n            amount,\n            meta.min_deposit\n        );\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer_from(\n            \u0026env.current_contract_address(),\n            \u0026from,\n            \u0026env.current_contract_address(),\n            \u0026amount,\n        );\n\n        meta.balance += amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"deposit\"), from), amount);\n\n        meta.balance\n    }\n\n    /// Deduct balance for an API call. Callable by authorized caller (e.g. backend).\n    /// Amount must not exceed max single deduct (see init / get_max_deduct).\n    /// If revenue pool is set, USDC is transferred to it; otherwise it remains in the vault.\n    /// Emits a \"deduct\" event with caller, optional request_id, amount, and new balance.\n    pub fn deduct(env: Env, caller: Address, amount: i128, request_id: Option\u003cSymbol\u003e) -\u003e i128 {\n        caller.require_auth();\n        let max_deduct = Self::get_max_deduct(env.clone());\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(amount \u003c= max_deduct, \"deduct amount exceeds max_deduct\");\n\n        let mut meta = Self::get_meta(env.clone());\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        let topics = match \u0026request_id {\n            Some(rid) =\u003e (Symbol::new(\u0026env, \"deduct\"), caller.clone(), rid.clone()),\n            None =\u003e (\n                Symbol::new(\u0026env, \"deduct\"),\n                caller.clone(),\n                Symbol::new(\u0026env, \"\"),\n            ),\n        };\n        env.events().publish(topics, (amount, meta.balance));\n        meta.balance\n    }\n\n    /// Batch deduct: multiple (amount, optional request_id) in one transaction.\n    /// Each amount must not exceed max_deduct. Reverts entire batch if any check fails.\n    /// If revenue pool is set, total deducted USDC is transferred to it once.\n    /// Emits one \"deduct\" event per item.\n    pub fn batch_deduct(env: Env, caller: Address, items: Vec\u003cDeductItem\u003e) -\u003e i128 {\n        caller.require_auth();\n        let max_deduct = Self::get_max_deduct(env.clone());\n        let mut meta = Self::get_meta(env.clone());\n        let n = items.len();\n        assert!(n \u003e 0, \"batch_deduct requires at least one item\");\n\n        let mut running = meta.balance;\n        for item in items.iter() {\n            assert!(item.amount \u003e 0, \"amount must be positive\");\n            let within_limit = item.amount \u003c= max_deduct;\n            assert!(within_limit, \"deduct amount exceeds max_deduct\");\n            assert!(running \u003e= item.amount, \"insufficient balance\");\n            running -= item.amount;\n        }\n\n        let mut balance = meta.balance;\n        for item in items.iter() {\n            balance -= item.amount;\n            let topics = match \u0026item.request_id {\n                Some(rid) =\u003e (Symbol::new(\u0026env, \"deduct\"), caller.clone(), rid.clone()),\n                None =\u003e (\n                    Symbol::new(\u0026env, \"deduct\"),\n                    caller.clone(),\n                    Symbol::new(\u0026env, \"\"),\n                ),\n            };\n            env.events().publish(topics, (item.amount, balance));\n        }\n\n        meta.balance = balance;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n        meta.balance\n    }\n\n    /// Withdraw from vault. Callable only by the vault owner; reduces balance and transfers USDC to owner.\n    pub fn withdraw(env: Env, amount: i128) -\u003e i128 {\n        let mut meta = Self::get_meta(env.clone());\n        meta.owner.require_auth();\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer(\u0026env.current_contract_address(), \u0026meta.owner, \u0026amount);\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events().publish(\n            (Symbol::new(\u0026env, \"withdraw\"), meta.owner.clone()),\n            (amount, meta.balance),\n        );\n        meta.balance\n    }\n\n    /// Withdraw from vault to a designated address. Owner-only; transfers USDC to `to`.\n    pub fn withdraw_to(env: Env, to: Address, amount: i128) -\u003e i128 {\n        let mut meta = Self::get_meta(env.clone());\n        meta.owner.require_auth();\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer(\u0026env.current_contract_address(), \u0026to, \u0026amount);\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events().publish(\n            (\n                Symbol::new(\u0026env, \"withdraw_to\"),\n                meta.owner.clone(),\n                to.clone(),\n            ),\n            (amount, meta.balance),\n        );\n        meta.balance\n    }\n\n    /// Return current balance.\n    pub fn balance(env: Env) -\u003e i128 {\n        Self::get_meta(env).balance\n    }\n}\n\n#[cfg(test)]\nmod 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crate std;\n\nuse super::*;\nuse soroban_sdk::testutils::{Address as _, Events as _};\nuse soroban_sdk::{token, IntoVal, Symbol};\n\nfn create_usdc\u003c'a\u003e(\n    env: \u0026'a Env,\n    admin: \u0026Address,\n) -\u003e (Address, token::Client\u003c'a\u003e, token::StellarAssetClient\u003c'a\u003e) {\n    let contract_address = env.register_stellar_asset_contract_v2(admin.clone());\n    let address = contract_address.address();\n    let client = token::Client::new(env, \u0026address);\n    let admin_client = token::StellarAssetClient::new(env, \u0026address);\n    (address, client, admin_client)\n}\n\nfn create_vault(env: \u0026Env) -\u003e (Address, CalloraVaultClient\u003c'_\u003e) {\n    let address = env.register(CalloraVault, ());\n    let client = CalloraVaultClient::new(env, \u0026address);\n    (address, client)\n}\n\nfn fund_vault(\n    usdc_admin_client: \u0026token::StellarAssetClient,\n    vault_address: \u0026Address,\n    amount: i128,\n) {\n    usdc_admin_client.mint(vault_address, \u0026amount);\n}\n\n#[test]\nfn vault_full_lifecycle() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    let meta = client.init(\u0026owner, \u0026usdc, \u0026Some(500), \u0026Some(10), \u0026None, \u0026None);\n    assert_eq!(meta.balance, 500);\n    assert_eq!(meta.owner, owner);\n    assert_eq!(client.balance(), 500);\n    assert_eq!(client.get_admin(), owner);\n\n    let depositor = Address::generate(\u0026env);\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    let after_deposit = client.deposit(\u0026depositor, \u0026200);\n    assert_eq!(after_deposit, 700);\n    assert_eq!(client.balance(), 700);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: Some(Symbol::new(\u0026env, \"r1\")),\n        },\n        DeductItem {\n            amount: 50,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 25,\n            request_id: Some(Symbol::new(\u0026env, \"r3\")),\n        },\n    ];\n    let after_batch = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(after_batch, 525);\n    assert_eq!(client.balance(), 525);\n\n    let after_deduct = client.deduct(\u0026caller, \u002625, \u0026Some(Symbol::new(\u0026env, \"r4\")));\n    assert_eq!(after_deduct, 500);\n\n    client.set_admin(\u0026owner, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    let after_withdraw = client.withdraw_to(\u0026recipient, \u0026100);\n    assert_eq!(after_withdraw, 400);\n    assert_eq!(client.balance(), 400);\n\n    let after_withdraw2 = client.withdraw(\u002650);\n    assert_eq!(after_withdraw2, 350);\n    assert_eq!(client.balance(), 350);\n\n    let final_meta = client.get_meta();\n    assert_eq!(final_meta.balance, 350);\n    assert_eq!(final_meta.owner, owner);\n    assert_eq!(final_meta.min_deposit, 10);\n}\n\n#[test]\nfn init_with_balance_emits_event() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n\n    let events = env.as_contract(\u0026contract_id, || {\n        CalloraVault::init(\n            env.clone(),\n            owner.clone(),\n            usdc_token.clone(),\n            Some(1000),\n            None,\n            None,\n            None,\n        );\n        env.events().all()\n    });\n\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    assert_eq!(client.balance(), 1000);\n\n    let last_event = events.last().expect(\"expected at least one event\");\n    assert_eq!(last_event.0, contract_id);\n\n    let topics = \u0026last_event.1;\n    assert_eq!(topics.len(), 2);\n    let topic0: Symbol = topics.get(0).unwrap().into_val(\u0026env);\n    let topic1: Address = topics.get(1).unwrap().into_val(\u0026env);\n    assert_eq!(topic0, Symbol::new(\u0026env, \"init\"));\n    assert_eq!(topic1, owner);\n\n    let data: i128 = last_event.2.into_val(\u0026env);\n    assert_eq!(data, 1000);\n}\n\n#[test]\nfn init_defaults_balance_to_zero() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\nfn get_meta_returns_owner_and_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n    let meta = client.get_meta();\n\n    assert_eq!(meta.owner, owner);\n    assert_eq!(meta.balance, 500);\n}\n\n#[test]\nfn get_meta_before_init_fails() {\n    let env = Env::default();\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n\n    let result = client.try_get_meta();\n    assert!(\n        result.is_err(),\n        \"expected error when vault is uninitialised\"\n    );\n}\n\n#[test]\nfn deposit_and_balance_match() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    let returned = client.deposit(\u0026depositor, \u0026200);\n\n    assert_eq!(\n        returned, 300,\n        \"deposit should return the new running balance\"\n    );\n    assert_eq!(client.balance(), 300);\n}\n\n#[test]\nfn deduct_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    client.deposit(\u0026depositor, \u0026200);\n    assert_eq!(client.balance(), 300);\n\n    let returned = client.deduct(\u0026caller, \u002650, \u0026None);\n    assert_eq!(returned, 250, \"deduct should return the remaining balance\");\n    assert_eq!(client.balance(), 250);\n}\n\n#[test]\nfn deduct_with_request_id() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let request_id = Symbol::new(\u0026env, \"req123\");\n    let remaining = client.deduct(\u0026caller, \u0026100, \u0026Some(request_id));\n    assert_eq!(remaining, 900);\n}\n\n#[test]\nfn deduct_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 10);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(10), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_deduct(\u0026caller, \u0026100, \u0026None);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn deduct_exact_balance_succeeds() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 75);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(75), \u0026None, \u0026None, \u0026None);\n    let remaining = client.deduct(\u0026caller, \u002675, \u0026None);\n\n    assert_eq!(remaining, 0);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\nfn deduct_event_contains_request_id() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let request_id = Symbol::new(\u0026env, \"api_call_42\");\n    client.deduct(\u0026caller, \u0026150, \u0026Some(request_id.clone()));\n\n    let events = env.events().all();\n    let ev = events.last().expect(\"expected deduct event\");\n\n    let topic0: Symbol = ev.1.get(0).unwrap().into_val(\u0026env);\n    let topic1: Address = ev.1.get(1).unwrap().into_val(\u0026env);\n    let topic2: Symbol = ev.1.get(2).unwrap().into_val(\u0026env);\n\n    assert_eq!(topic0, Symbol::new(\u0026env, \"deduct\"));\n    assert_eq!(topic1, caller);\n    assert_eq!(topic2, request_id);\n\n    let (emitted_amount, remaining): (i128, i128) = ev.2.into_val(\u0026env);\n    assert_eq!(emitted_amount, 150);\n    assert_eq!(remaining, 350);\n}\n\n#[test]\nfn deduct_event_no_request_id_uses_empty_symbol() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 300);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(300), \u0026None, \u0026None, \u0026None);\n    client.deduct(\u0026caller, \u0026100, \u0026None);\n\n    let events = env.events().all();\n    let ev = events.last().expect(\"expected deduct event\");\n\n    let topic0: Symbol = ev.1.get(0).unwrap().into_val(\u0026env);\n    let topic2: Symbol = ev.1.get(2).unwrap().into_val(\u0026env);\n\n    assert_eq!(topic0, Symbol::new(\u0026env, \"deduct\"));\n    assert_eq!(topic2, Symbol::new(\u0026env, \"\"));\n}\n\n#[test]\nfn batch_deduct_events_contain_request_ids() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let rid_a = Symbol::new(\u0026env, \"batch_a\");\n    let rid_b = Symbol::new(\u0026env, \"batch_b\");\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 200,\n            request_id: Some(rid_a.clone()),\n        },\n        DeductItem {\n            amount: 300,\n            request_id: Some(rid_b.clone()),\n        },\n    ];\n    client.batch_deduct(\u0026caller, \u0026items);\n\n    let all_events = env.events().all();\n    assert_eq!(all_events.len(), 2);\n\n    let ev_a = all_events.get(0).unwrap();\n    let ev_b = all_events.get(1).unwrap();\n\n    let req_a: Symbol = ev_a.1.get(2).unwrap().into_val(\u0026env);\n    let req_b: Symbol = ev_b.1.get(2).unwrap().into_val(\u0026env);\n    assert_eq!(req_a, rid_a);\n    assert_eq!(req_b, rid_b);\n\n    let (amt_a, _): (i128, i128) = ev_a.2.into_val(\u0026env);\n    let (amt_b, _): (i128, i128) = ev_b.2.into_val(\u0026env);\n    assert_eq!(amt_a, 200);\n    assert_eq!(amt_b, 300);\n}\n\n#[test]\nfn get_admin_returns_correct_address() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let admin = client.get_admin();\n    assert_eq!(admin, owner);\n}\n\n#[test]\nfn set_admin_updates_admin() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    client.set_admin(\u0026owner, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n}\n\n#[test]\nfn set_admin_unauthorized_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let intruder = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_set_admin(\u0026intruder, \u0026new_admin);\n    assert!(\n        result.is_err(),\n        \"expected error when non-admin tries to set admin\"\n    );\n}\n\n#[test]\nfn distribute_transfers_usdc_to_developer() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, usdc_client, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    client.distribute(\u0026admin, \u0026developer, \u0026300);\n\n    assert_eq!(usdc_client.balance(\u0026developer), 300);\n    assert_eq!(usdc_client.balance(\u0026vault_address), 700);\n}\n\n#[test]\nfn distribute_unauthorized_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let intruder = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026intruder, \u0026developer, \u0026300);\n    assert!(\n        result.is_err(),\n        \"expected error when non-admin tries to distribute\"\n    );\n}\n\n#[test]\nfn distribute_insufficient_usdc_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 100);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026admin, \u0026developer, \u0026500);\n    assert!(\n        result.is_err(),\n        \"expected error for insufficient USDC balance\"\n    );\n}\n\n#[test]\nfn distribute_zero_amount_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026admin, \u0026developer, \u00260);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn batch_deduct_multiple_items() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: Some(Symbol::new(\u0026env, \"req1\"))\n        },\n        DeductItem {\n            amount: 200,\n            request_id: None\n        },\n        DeductItem {\n            amount: 50,\n            request_id: Some(Symbol::new(\u0026env, \"req2\"))\n        }\n    ];\n\n    let remaining = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(remaining, 650);\n    assert_eq!(client.balance(), 650);\n}\n\n#[test]\nfn batch_deduct_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 50,\n            request_id: None\n        },\n        DeductItem {\n            amount: 80,\n            request_id: None\n        }\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for batch overdraw\");\n    assert_eq!(client.balance(), 100);\n}\n\n#[test]\nfn batch_deduct_empty_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items: soroban_sdk::Vec\u003cDeductItem\u003e = soroban_sdk::vec![\u0026env];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for empty batch\");\n}\n\n#[test]\nfn batch_deduct_zero_amount_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 0,\n            request_id: None\n        }\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn withdraw_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let remaining = client.withdraw(\u0026200);\n    assert_eq!(remaining, 300);\n    assert_eq!(client.balance(), 300);\n}\n\n#[test]\nfn withdraw_insufficient_balance_fails() {\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw(\u0026500);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn withdraw_zero_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw(\u00260);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn withdraw_to_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let remaining = client.withdraw_to(\u0026recipient, \u0026150);\n    assert_eq!(remaining, 350);\n    assert_eq!(client.balance(), 350);\n}\n\n#[test]\nfn withdraw_to_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw_to(\u0026recipient, \u0026500);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn deposit_below_minimum_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026Some(50), \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 30);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u002630, \u00261000);\n    let result = client.try_deposit(\u0026depositor, \u002630);\n    assert!(result.is_err(), \"expected error for deposit below minimum\");\n}\n\n#[test]\nfn deposit_at_minimum_succeeds() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026Some(50), \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 50);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u002650, \u00261000);\n    let new_balance = client.deposit(\u0026depositor, \u002650);\n    assert_eq!(new_balance, 150);\n}\n\n#[test]\nfn double_init_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026Some(200), \u0026None, \u0026None, \u0026None);\n    assert!(result.is_err(), \"expected error for double init\");\n}\n\n#[test]\nfn init_insufficient_usdc_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 50);\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    assert!(\n        result.is_err(),\n        \"expected error when initial_balance exceeds contract USDC\"\n    );\n}\n\n#[test]\nfn init_with_zero_max_deduct_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026Some(0));\n    assert!(result.is_err(), \"expected error for max_deduct \u003c= 0\");\n}\n\n#[test]\nfn init_with_revenue_pool_and_get_revenue_pool() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let revenue_pool = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\n        \u0026owner,\n        \u0026usdc_token,\n        \u0026None,\n        \u0026None,\n        \u0026Some(revenue_pool.clone()),\n        \u0026None,\n    );\n\n    let retrieved_pool = client.get_revenue_pool();\n    assert_eq!(retrieved_pool, Some(revenue_pool));\n}\n\n#[test]\nfn get_revenue_pool_returns_none_when_not_set() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026None);\n\n    let retrieved_pool = client.get_revenue_pool();\n    assert_eq!(retrieved_pool, None);\n}\n\n#[test]\nfn get_max_deduct_returns_configured_value() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026Some(5000));\n\n    let max_deduct = client.get_max_deduct();\n    assert_eq!(max_deduct, 5000);\n}\n\n/// Fuzz test: random deposit/deduct sequence asserting balance \u003e= 0 and matches expected.\n/// Run with: cargo test --package callora-vault fuzz_deposit_and_deduct -- --nocapture\n#[test]\nfn fuzz_deposit_and_deduct() {\n    use rand::Rng;\n\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    let initial_balance: i128 = 1_000;\n    fund_vault(\u0026usdc_admin, \u0026vault_address, initial_balance);\n    // Pre-fund owner for deposits in the loop\n    usdc_admin.mint(\u0026owner, \u0026250_000);\n    usdc_client.approve(\u0026owner, \u0026vault_address, \u0026250_000, \u002610_000);\n    vault.init(\n        \u0026owner,\n        \u0026usdc_address,\n        \u0026Some(initial_balance),\n        \u0026None,\n        \u0026None,\n        \u0026None,\n    );\n    let mut expected = initial_balance;\n    let mut rng = rand::thread_rng();\n\n    for _ in 0..500 {\n        if rng.gen_bool(0.5) {\n            let amount = rng.gen_range(1..=500);\n            vault.deposit(\u0026owner, \u0026amount);\n            expected += amount;\n        } else if expected \u003e 0 {\n            let amount = rng.gen_range(1..=expected.min(500));\n            vault.deduct(\u0026owner, \u0026amount, \u0026None);\n            expected -= amount;\n        }\n\n        let balance = vault.balance();\n        assert!(balance \u003e= 0, \"balance went negative: {}\", balance);\n        assert_eq!(\n            balance, expected,\n            \"balance mismatch: got {}, expected {}\",\n            balance, expected\n        );\n    }\n\n    assert_eq!(vault.balance(), expected);\n}\n\n#[test]\nfn deduct_returns_new_balance() {\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    fund_vault(\u0026usdc_admin, \u0026vault_address, 100);\n    vault.init(\u0026owner, \u0026usdc_address, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    let new_balance = vault.deduct(\u0026owner, \u002630, \u0026None);\n    assert_eq!(new_balance, 70);\n    assert_eq!(vault.balance(), 70);\n}\n\n/// Fuzz test (seeded): deterministic deposit/deduct sequence asserting balance \u003e= 0 and matches expected.\n#[test]\nfn fuzz_deposit_and_deduct_seeded() {\n    use rand::rngs::StdRng;\n    use rand::{Rng, SeedableRng};\n\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    // Pre-fund owner for deposits in the loop\n    usdc_admin.mint(\u0026owner, \u00265_000_000);\n    usdc_client.approve(\u0026owner, \u0026vault_address, \u00265_000_000, \u002610_000);\n    vault.init(\u0026owner, \u0026usdc_address, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n    let mut expected: i128 = 0;\n    let mut rng = StdRng::seed_from_u64(42);\n\n    for _ in 0..500 {\n        let action: u8 = rng.gen_range(0..2);\n\n        if action == 0 {\n            let amount: i128 = rng.gen_range(1..=10_000);\n            vault.deposit(\u0026owner, \u0026amount);\n            expected += amount;\n        } else if expected \u003e 0 {\n            let amount: i128 = rng.gen_range(1..=expected);\n            vault.deduct(\u0026owner, \u0026amount, \u0026None);\n            expected -= amount;\n        }\n\n        assert!(expected \u003e= 0, \"balance went negative\");\n        assert_eq!(vault.balance(), expected, \"balance mismatch at iteration\");\n    }\n}\n\n#[test]\nfn batch_deduct_all_succeed() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 60);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(60), \u0026None, \u0026None, \u0026None);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n    let new_balance = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(new_balance, 0);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient balance\")]\nfn batch_deduct_all_revert() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 25);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(25), \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 25);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n    client.batch_deduct(\u0026caller, \u0026items);\n}\n\n#[test]\nfn batch_deduct_revert_preserves_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 25);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(25), \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 25);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n\n    let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {\n        client.batch_deduct(\u0026caller, \u0026items);\n    }));\n\n    assert!(result.is_err());\n    assert_eq!(client.balance(), 25);\n}\n\n#[test]\nfn owner_unchanged_after_deposit_and_deduct() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    // Fund owner for the deposit call\n    usdc_admin.mint(\u0026owner, \u002650);\n    usdc_client.approve(\u0026owner, \u0026contract_id, \u002650, \u002610_000);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    client.deposit(\u0026owner, \u002650);\n    client.deduct(\u0026owner, \u002630, \u0026None);\n\n    assert_eq!(client.get_meta().owner, owner);\n}\n","traces":[{"line":7,"address":[11179664,11180127,11180133],"length":1,"stats":{"Line":1}},{"line":11,"address":[],"length":0,"stats":{"Line":12}},{"line":12,"address":[],"length":0,"stats":{"Line":3}},{"line":13,"address":[],"length":0,"stats":{"Line":3}},{"line":14,"address":[],"length":0,"stats":{"Line":6}},{"line":15,"address":[],"length":0,"stats":{"Line":1}},{"line":18,"address":[11180160,11180351,11180345],"length":1,"stats":{"Line":1}},{"line":19,"address":[11180199],"length":1,"stats":{"Line":1}},{"line":20,"address":[11180219],"length":1,"stats":{"Line":1}},{"line":21,"address":[11180264],"length":1,"stats":{"Line":1}},{"line":24,"address":[11179616],"length":1,"stats":{"Line":2}},{"line":29,"address":[11179639],"length":1,"stats":{"Line":12}}],"covered":12,"coverable":12}]};
         var data = {"files":[{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","contracts","revenue_pool","src","lib.rs"],"content":"#![no_std]\n\nuse soroban_sdk::{contract, contractimpl, token, Address, Env, Symbol, Vec};\n\n/// Revenue settlement contract: receives USDC from vault deducts and distributes to developers.\n///\n/// Flow: vault deduct → vault transfers USDC to this contract → admin calls distribute(to, amount).\nconst ADMIN_KEY: \u0026str = \"admin\";\nconst USDC_KEY: \u0026str = \"usdc\";\n\n#[contract]\npub struct RevenuePool;\n\n#[contractimpl]\nimpl RevenuePool {\n    /// Initialize the revenue pool with an admin and the USDC token address.\n    ///\n    /// # Arguments\n    /// * `admin` – Address that may call `distribute`. Typically backend or multisig.\n    /// * `usdc_token` – Stellar USDC (or wrapped USDC) token contract address.\n    pub fn init(env: Env, admin: Address, usdc_token: Address) {\n        admin.require_auth();\n        if env.storage().instance().has(\u0026Symbol::new(\u0026env, ADMIN_KEY)) {\n            panic!(\"revenue pool already initialized\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026admin);\n        inst.set(\u0026Symbol::new(\u0026env, USDC_KEY), \u0026usdc_token);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"init\"), admin), usdc_token);\n    }\n\n    /// Return the current admin address.\n    pub fn get_admin(env: Env) -\u003e Address {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, ADMIN_KEY))\n            .unwrap_or_else(|| panic!(\"revenue pool not initialized\"))\n    }\n\n    /// Replace the current admin. Only the existing admin may call this.\n    pub fn set_admin(env: Env, caller: Address, new_admin: Address) {\n        caller.require_auth();\n        let current = Self::get_admin(env.clone());\n        if caller != current {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026new_admin);\n    }\n\n    /// Placeholder: record that payment was received (e.g. from vault).\n    /// In practice, USDC is received when the vault (or any address) transfers tokens\n    /// to this contract's address; no separate \"receive\" call is required.\n    ///\n    /// This function can be used to emit an event for indexers when the backend\n    /// wants to log that a payment was credited from the vault.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be admin (or could be extended to allow vault to call).\n    /// * `amount` – Amount received (for event logging).\n    /// * `from_vault` – Optional; true if the source was the vault.\n    pub fn receive_payment(env: Env, caller: Address, amount: i128, from_vault: bool) {\n        caller.require_auth();\n        let _admin = Self::get_admin(env.clone());\n        env.events().publish(\n            (Symbol::new(\u0026env, \"receive_payment\"), caller),\n            (amount, from_vault),\n        );\n    }\n\n    /// Distribute USDC from this contract to a developer wallet.\n    ///\n    /// Only the admin may call. Transfers USDC from this contract to `to`.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be the current admin.\n    /// * `to` – Developer address to receive USDC.\n    /// * `amount` – Amount in token base units (e.g. USDC stroops).\n    pub fn distribute(env: Env, caller: Address, to: Address, amount: i128) {\n        caller.require_auth();\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        if amount \u003c= 0 {\n            panic!(\"amount must be positive\");\n        }\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"revenue pool not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        let contract_address = env.current_contract_address();\n        if usdc.balance(\u0026contract_address) \u003c amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        usdc.transfer(\u0026contract_address, \u0026to, \u0026amount);\n        env.events()\n            .publish((Symbol::new(\u0026env, \"distribute\"), to), amount);\n    }\n\n    /// Distribute USDC from this contract to multiple developer wallets in one transaction.\n    ///\n    /// Only the admin may call. Iterates through the vector of payments and atomically\n    /// transfers USDC to each developer. Fails if the total amount exceeds balance\n    /// or if any individual amount is not positive.\n    ///\n    /// # Arguments\n    /// * `caller` - Must be the current admin.\n    /// * `payments` - A vector of (Address, amount) tuples.\n    pub fn batch_distribute(env: Env, caller: Address, payments: Vec\u003c(Address, i128)\u003e) {\n        caller.require_auth();\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n\n        let mut total_amount: i128 = 0;\n        for payment in payments.iter() {\n            let (_, amount) = payment;\n            if amount \u003c= 0 {\n                panic!(\"amount must be positive\");\n            }\n            total_amount += amount;\n        }\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"revenue pool not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        let contract_address = env.current_contract_address();\n        if usdc.balance(\u0026contract_address) \u003c total_amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        for payment in payments.iter() {\n            let (to, amount) = payment;\n            usdc.transfer(\u0026contract_address, \u0026to, \u0026amount);\n            env.events()\n                .publish((Symbol::new(\u0026env, \"batch_distribute\"), to), amount);\n        }\n    }\n\n    /// Return this contract's USDC balance (for testing and dashboards).\n    pub fn balance(env: Env) -\u003e i128 {\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .unwrap_or_else(|| panic!(\"revenue pool not initialized\"));\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.balance(\u0026env.current_contract_address())\n    }\n}\n\n#[cfg(test)]\nmod test;\n","traces":[{"line":21,"address":[10907360,10908562,10908717],"length":1,"stats":{"Line":2}},{"line":22,"address":[10907395],"length":1,"stats":{"Line":8}},{"line":23,"address":[10907489,10908568],"length":1,"stats":{"Line":2}},{"line":24,"address":[10908600],"length":1,"stats":{"Line":1}},{"line":26,"address":[10907790],"length":1,"stats":{"Line":8}},{"line":27,"address":[10907936],"length":1,"stats":{"Line":2}},{"line":28,"address":[10908060],"length":1,"stats":{"Line":7}},{"line":30,"address":[10908195],"length":1,"stats":{"Line":6}},{"line":31,"address":[10908207],"length":1,"stats":{"Line":1}},{"line":35,"address":[10909568,10909937],"length":1,"stats":{"Line":1}},{"line":36,"address":[10909594],"length":1,"stats":{"Line":1}},{"line":38,"address":[10909791,10909704],"length":1,"stats":{"Line":2}},{"line":39,"address":[10967216,10967217],"length":1,"stats":{"Line":2}},{"line":43,"address":[10910634,10910670,10909968],"length":1,"stats":{"Line":2}},{"line":44,"address":[10910003],"length":1,"stats":{"Line":1}},{"line":45,"address":[10910065],"length":1,"stats":{"Line":1}},{"line":46,"address":[10910094,10910156],"length":1,"stats":{"Line":3}},{"line":47,"address":[10910182,10910650],"length":1,"stats":{"Line":2}},{"line":49,"address":[10910214,10910175],"length":1,"stats":{"Line":2}},{"line":50,"address":[10910353],"length":1,"stats":{"Line":2}},{"line":64,"address":[10904585,10904547,10904000],"length":1,"stats":{"Line":2}},{"line":65,"address":[10904067],"length":1,"stats":{"Line":2}},{"line":66,"address":[10904145],"length":1,"stats":{"Line":1}},{"line":67,"address":[10904182,10904462],"length":1,"stats":{"Line":2}},{"line":68,"address":[10904323,10904232],"length":1,"stats":{"Line":2}},{"line":81,"address":[10902336,10903826,10903952],"length":1,"stats":{"Line":4}},{"line":82,"address":[10902376],"length":1,"stats":{"Line":1}},{"line":83,"address":[10902457],"length":1,"stats":{"Line":4}},{"line":84,"address":[10902489,10902551],"length":1,"stats":{"Line":4}},{"line":85,"address":[10903899,10902579],"length":1,"stats":{"Line":2}},{"line":87,"address":[10902557],"length":1,"stats":{"Line":2}},{"line":88,"address":[10902631,10903871],"length":1,"stats":{"Line":3}},{"line":94,"address":[10902835,10902739],"length":1,"stats":{"Line":2}},{"line":96,"address":[10903113],"length":1,"stats":{"Line":1}},{"line":98,"address":[10903145],"length":1,"stats":{"Line":1}},{"line":99,"address":[10903293,10903205],"length":1,"stats":{"Line":3}},{"line":100,"address":[10903841,10903350],"length":1,"stats":{"Line":2}},{"line":103,"address":[10903318],"length":1,"stats":{"Line":1}},{"line":104,"address":[10903394,10903625],"length":1,"stats":{"Line":3}},{"line":105,"address":[10903651,10903406],"length":1,"stats":{"Line":2}},{"line":117,"address":[10906841,10907144,10904608],"length":1,"stats":{"Line":5}},{"line":118,"address":[10904646],"length":1,"stats":{"Line":1}},{"line":119,"address":[10904718],"length":1,"stats":{"Line":1}},{"line":120,"address":[10904753,10904824],"length":1,"stats":{"Line":2}},{"line":121,"address":[10904877,10907123],"length":1,"stats":{"Line":2}},{"line":124,"address":[10904838],"length":1,"stats":{"Line":1}},{"line":125,"address":[10905021,10904870,10904925],"length":1,"stats":{"Line":3}},{"line":126,"address":[10905112],"length":1,"stats":{"Line":1}},{"line":127,"address":[10905154],"length":1,"stats":{"Line":1}},{"line":128,"address":[10906950,10907092],"length":1,"stats":{"Line":2}},{"line":130,"address":[10906909,10907022,10906988],"length":1,"stats":{"Line":2}},{"line":136,"address":[10905380,10905284],"length":1,"stats":{"Line":2}},{"line":138,"address":[10905658],"length":1,"stats":{"Line":1}},{"line":140,"address":[10905690],"length":1,"stats":{"Line":1}},{"line":141,"address":[10905838,10905750],"length":1,"stats":{"Line":3}},{"line":142,"address":[10906879,10905887],"length":1,"stats":{"Line":2}},{"line":145,"address":[10905935,10906031,10906836,10905880],"length":1,"stats":{"Line":4}},{"line":146,"address":[10906126],"length":1,"stats":{"Line":1}},{"line":147,"address":[10906214],"length":1,"stats":{"Line":1}},{"line":148,"address":[10906534,10906770],"length":1,"stats":{"Line":2}},{"line":149,"address":[10906546,10906802],"length":1,"stats":{"Line":2}},{"line":154,"address":[10908736,10909548],"length":1,"stats":{"Line":1}},{"line":158,"address":[10908877,10908964],"length":1,"stats":{"Line":2}},{"line":159,"address":[10908831,10908908,10908971],"length":1,"stats":{"Line":5}},{"line":160,"address":[10909215],"length":1,"stats":{"Line":1}},{"line":161,"address":[10909244,10909304],"length":1,"stats":{"Line":2}}],"covered":66,"coverable":66},{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","contracts","revenue_pool","src","test.rs"],"content":"extern crate std;\n\nuse super::*;\nuse soroban_sdk::testutils::{Address as _, Events as _};\nuse soroban_sdk::token;\n\nfn create_usdc\u003c'a\u003e(\n    env: \u0026'a Env,\n    admin: \u0026Address,\n) -\u003e (Address, token::Client\u003c'a\u003e, token::StellarAssetClient\u003c'a\u003e) {\n    let contract_address = env.register_stellar_asset_contract_v2(admin.clone());\n    let address = contract_address.address();\n    let client = token::Client::new(env, \u0026address);\n    let admin_client = token::StellarAssetClient::new(env, \u0026address);\n    (address, client, admin_client)\n}\n\nfn create_pool(env: \u0026Env) -\u003e (Address, RevenuePoolClient\u003c'_\u003e) {\n    let address = env.register(RevenuePool, ());\n    let client = RevenuePoolClient::new(env, \u0026address);\n    (address, client)\n}\n\nfn fund_pool(usdc_admin_client: \u0026token::StellarAssetClient, pool_address: \u0026Address, amount: i128) {\n    usdc_admin_client.mint(pool_address, \u0026amount);\n}\n\n#[test]\nfn init_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_pool_addr, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    assert_eq!(client.get_admin(), admin);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\n#[should_panic(expected = \"revenue pool already initialized\")]\nfn init_double_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.init(\u0026admin, \u0026usdc);\n}\n\n#[test]\nfn distribute_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1_000);\n    client.distribute(\u0026admin, \u0026developer, \u0026400);\n\n    assert_eq!(usdc_client.balance(\u0026pool_addr), 600);\n    assert_eq!(usdc_client.balance(\u0026developer), 400);\n}\n\n#[test]\n#[should_panic(expected = \"amount must be positive\")]\nfn distribute_zero_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.distribute(\u0026admin, \u0026developer, \u00260);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient USDC balance\")]\nfn distribute_excess_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 100);\n    client.distribute(\u0026admin, \u0026developer, \u0026101);\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn distribute_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n    client.distribute(\u0026attacker, \u0026developer, \u0026100);\n}\n\n#[test]\nfn set_admin_transfers_control() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 300);\n    client.set_admin(\u0026admin, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    client.distribute(\u0026new_admin, \u0026developer, \u0026100);\n    assert_eq!(usdc_client.balance(\u0026developer), 100);\n}\n\n#[test]\nfn receive_payment_emits_event() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.receive_payment(\u0026admin, \u0026500, \u0026true);\n    let events = env.events().all();\n    assert!(!events.is_empty());\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn set_admin_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.set_admin(\u0026attacker, \u0026new_admin);\n}\n\n#[test]\n#[should_panic(expected = \"revenue pool not initialized\")]\nfn balance_before_init_panics() {\n    let env = Env::default();\n    let (_, client) = create_pool(\u0026env);\n    client.balance();\n}\n\n#[test]\nfn distribute_negative_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {\n        client.distribute(\u0026admin, \u0026developer, \u0026-1);\n    }));\n    assert!(result.is_err());\n}\n\n#[test]\nfn receive_payment_from_non_vault() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.receive_payment(\u0026admin, \u0026250, \u0026false);\n\n    let events = env.events().all();\n    assert!(!events.is_empty());\n}\n\n/// Full lifecycle test: init, get_admin, balance, distribute, receive_payment, set_admin.\n#[test]\nfn full_lifecycle() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    // Init\n    client.init(\u0026admin, \u0026usdc_address);\n    assert_eq!(client.get_admin(), admin);\n\n    // Fund and check balance\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1000);\n    assert_eq!(client.balance(), 1000);\n\n    // Distribute\n    client.distribute(\u0026admin, \u0026developer, \u0026400);\n    assert_eq!(usdc_client.balance(\u0026developer), 400);\n    assert_eq!(client.balance(), 600);\n\n    // Receive payment event\n    client.receive_payment(\u0026admin, \u0026100, \u0026true);\n\n    // Set admin\n    client.set_admin(\u0026admin, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    // New admin can distribute\n    client.distribute(\u0026new_admin, \u0026developer, \u0026100);\n    assert_eq!(usdc_client.balance(\u0026developer), 500);\n    assert_eq!(client.balance(), 500);\n}\n\n#[test]\nfn batch_distribute_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev1 = Address::generate(\u0026env);\n    let dev2 = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1000);\n\n    let mut payments: Vec\u003c(Address, i128)\u003e = Vec::new(\u0026env);\n    payments.push_back((dev1.clone(), 300_i128));\n    payments.push_back((dev2.clone(), 200_i128));\n    client.batch_distribute(\u0026admin, \u0026payments);\n\n    assert_eq!(usdc_client.balance(\u0026dev1), 300);\n    assert_eq!(usdc_client.balance(\u0026dev2), 200);\n    assert_eq!(client.balance(), 500);\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn batch_distribute_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n\n    let mut payments: Vec\u003c(Address, i128)\u003e = Vec::new(\u0026env);\n    payments.push_back((dev.clone(), 100_i128));\n    client.batch_distribute(\u0026attacker, \u0026payments);\n}\n\n#[test]\n#[should_panic(expected = \"amount must be positive\")]\nfn batch_distribute_zero_amount_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n\n    let mut payments: Vec\u003c(Address, i128)\u003e = Vec::new(\u0026env);\n    payments.push_back((dev.clone(), 0_i128));\n    client.batch_distribute(\u0026admin, \u0026payments);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient USDC balance\")]\nfn batch_distribute_insufficient_balance_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 50);\n\n    let mut payments: Vec\u003c(Address, i128)\u003e = Vec::new(\u0026env);\n    payments.push_back((dev.clone(), 100_i128));\n    client.batch_distribute(\u0026admin, \u0026payments);\n}\n","traces":[{"line":7,"address":[10943839,10943376,10943845],"length":1,"stats":{"Line":1}},{"line":11,"address":[10943438],"length":1,"stats":{"Line":15}},{"line":12,"address":[10943477],"length":1,"stats":{"Line":15}},{"line":13,"address":[10943542],"length":1,"stats":{"Line":5}},{"line":14,"address":[10943615],"length":1,"stats":{"Line":1}},{"line":15,"address":[10943683],"length":1,"stats":{"Line":6}},{"line":18,"address":[10943168,10943359,10943353],"length":1,"stats":{"Line":1}},{"line":19,"address":[10943207],"length":1,"stats":{"Line":1}},{"line":20,"address":[10943227],"length":1,"stats":{"Line":1}},{"line":21,"address":[10943272],"length":1,"stats":{"Line":1}},{"line":24,"address":[10964240],"length":1,"stats":{"Line":3}},{"line":25,"address":[10964263],"length":1,"stats":{"Line":1}}],"covered":12,"coverable":12},{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","contracts","vault","src","lib.rs"],"content":"#![no_std]\n\nuse soroban_sdk::{contract, contractimpl, contracttype, token, Address, Env, Symbol, Vec};\n\n/// Single item for batch deduct: amount and optional request id for idempotency/tracking.\n#[contracttype]\n#[derive(Clone)]\npub struct DeductItem {\n    pub amount: i128,\n    pub request_id: Option\u003cSymbol\u003e,\n}\n\n#[contracttype]\n#[derive(Clone)]\npub struct VaultMeta {\n    pub owner: Address,\n    pub balance: i128,\n    /// Minimum amount required per deposit; deposits below this panic.\n    pub min_deposit: i128,\n}\n\nconst META_KEY: \u0026str = \"meta\";\nconst USDC_KEY: \u0026str = \"usdc\";\nconst ADMIN_KEY: \u0026str = \"admin\";\nconst REVENUE_POOL_KEY: \u0026str = \"revenue_pool\";\nconst MAX_DEDUCT_KEY: \u0026str = \"max_deduct\";\n\n/// Default maximum single deduct amount when not set at init (no cap).\npub const DEFAULT_MAX_DEDUCT: i128 = i128::MAX;\n\n#[contracttype]\n#[derive(Clone, Debug, PartialEq)]\npub struct DistributeEvent {\n    pub to: Address,\n    pub amount: i128,\n}\n\n#[contract]\npub struct CalloraVault;\n\n#[contractimpl]\nimpl CalloraVault {\n    /// Initialize vault for an owner with optional initial balance and minimum deposit.\n    /// If initial_balance \u003e 0, the contract must already hold at least that much USDC (e.g. deployer transferred in first).\n    /// Emits an \"init\" event with the owner address and initial balance.\n    ///\n    /// # Arguments\n    /// * `revenue_pool` – Optional address to receive USDC on each deduct (e.g. settlement contract). If None, USDC stays in vault.\n    /// * `max_deduct` – Optional cap per single deduct; if None, uses DEFAULT_MAX_DEDUCT (no cap).\n    pub fn init(\n        env: Env,\n        owner: Address,\n        usdc_token: Address,\n        initial_balance: Option\u003ci128\u003e,\n        min_deposit: Option\u003ci128\u003e,\n        revenue_pool: Option\u003cAddress\u003e,\n        max_deduct: Option\u003ci128\u003e,\n    ) -\u003e VaultMeta {\n        owner.require_auth();\n        if env.storage().instance().has(\u0026Symbol::new(\u0026env, META_KEY)) {\n            panic!(\"vault already initialized\");\n        }\n        let balance = initial_balance.unwrap_or(0);\n        if balance \u003e 0 {\n            let usdc = token::Client::new(\u0026env, \u0026usdc_token);\n            let contract_balance = usdc.balance(\u0026env.current_contract_address());\n            if contract_balance \u003c balance {\n                panic!(\"insufficient USDC in contract for initial_balance\");\n            }\n        }\n        let min_deposit_val = min_deposit.unwrap_or(0);\n        let max_deduct_val = max_deduct.unwrap_or(DEFAULT_MAX_DEDUCT);\n        if max_deduct_val \u003c= 0 {\n            panic!(\"max_deduct must be positive\");\n        }\n        let meta = VaultMeta {\n            owner: owner.clone(),\n            balance,\n            min_deposit: min_deposit_val,\n        };\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n        inst.set(\u0026Symbol::new(\u0026env, META_KEY), \u0026meta);\n        inst.set(\u0026Symbol::new(\u0026env, USDC_KEY), \u0026usdc_token);\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026owner);\n        if let Some(pool) = revenue_pool {\n            inst.set(\u0026Symbol::new(\u0026env, REVENUE_POOL_KEY), \u0026pool);\n        }\n        inst.set(\u0026Symbol::new(\u0026env, MAX_DEDUCT_KEY), \u0026max_deduct_val);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"init\"), owner), balance);\n\n        meta\n    }\n\n    /// Return the current admin address.\n    pub fn get_admin(env: Env) -\u003e Address {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, ADMIN_KEY))\n            .expect(\"vault not initialized\")\n    }\n\n    /// Replace the current admin. Only the existing admin may call this.\n    pub fn set_admin(env: Env, caller: Address, new_admin: Address) {\n        caller.require_auth();\n        let current_admin = Self::get_admin(env.clone());\n        if caller != current_admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026new_admin);\n    }\n\n    /// Return the maximum allowed amount for a single deduct (configurable at init).\n    pub fn get_max_deduct(env: Env) -\u003e i128 {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, MAX_DEDUCT_KEY))\n            .expect(\"vault not initialized\")\n    }\n\n    /// Return the revenue pool address if set (receives USDC on deduct).\n    pub fn get_revenue_pool(env: Env) -\u003e Option\u003cAddress\u003e {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, REVENUE_POOL_KEY))\n            .unwrap_or(None)\n    }\n\n    /// Distribute accumulated USDC to a single developer address.\n    pub fn distribute(env: Env, caller: Address, to: Address, amount: i128) {\n        caller.require_auth();\n\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n\n        if amount \u003c= 0 {\n            panic!(\"amount must be positive\");\n        }\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        let vault_balance = usdc.balance(\u0026env.current_contract_address());\n        if vault_balance \u003c amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        usdc.transfer(\u0026env.current_contract_address(), \u0026to, \u0026amount);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"distribute\"), to), amount);\n    }\n\n    /// Get vault metadata (owner and balance).\n    pub fn get_meta(env: Env) -\u003e VaultMeta {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, META_KEY))\n            .expect(\"vault not initialized\")\n    }\n\n    /// Deposit: user transfers USDC to the contract; contract increases internal balance.\n    pub fn deposit(env: Env, from: Address, amount: i128) -\u003e i128 {\n        from.require_auth();\n\n        let mut meta = Self::get_meta(env.clone());\n        assert!(\n            amount \u003e= meta.min_deposit,\n            \"deposit below minimum: {} \u003c {}\",\n            amount,\n            meta.min_deposit\n        );\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer_from(\n            \u0026env.current_contract_address(),\n            \u0026from,\n            \u0026env.current_contract_address(),\n            \u0026amount,\n        );\n\n        meta.balance += amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"deposit\"), from), amount);\n\n        meta.balance\n    }\n\n    /// Deduct balance for an API call.\n    pub fn deduct(env: Env, caller: Address, amount: i128, request_id: Option\u003cSymbol\u003e) -\u003e i128 {\n        caller.require_auth();\n        let max_deduct = Self::get_max_deduct(env.clone());\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(amount \u003c= max_deduct, \"deduct amount exceeds max_deduct\");\n\n        let mut meta = Self::get_meta(env.clone());\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        let topics = match \u0026request_id {\n            Some(rid) =\u003e (Symbol::new(\u0026env, \"deduct\"), caller.clone(), rid.clone()),\n            None =\u003e (\n                Symbol::new(\u0026env, \"deduct\"),\n                caller.clone(),\n                Symbol::new(\u0026env, \"\"),\n            ),\n        };\n        env.events().publish(topics, (amount, meta.balance));\n        meta.balance\n    }\n\n    /// Batch deduct: multiple (amount, optional request_id) in one transaction.\n    pub fn batch_deduct(env: Env, caller: Address, items: Vec\u003cDeductItem\u003e) -\u003e i128 {\n        caller.require_auth();\n        let max_deduct = Self::get_max_deduct(env.clone());\n        let mut meta = Self::get_meta(env.clone());\n        let n = items.len();\n        assert!(n \u003e 0, \"batch_deduct requires at least one item\");\n\n        let mut running = meta.balance;\n        for item in items.iter() {\n            assert!(item.amount \u003e 0, \"amount must be positive\");\n            let within_limit = item.amount \u003c= max_deduct;\n            assert!(within_limit, \"deduct amount exceeds max_deduct\");\n            assert!(running \u003e= item.amount, \"insufficient balance\");\n            running -= item.amount;\n        }\n\n        let mut balance = meta.balance;\n        for item in items.iter() {\n            balance -= item.amount;\n            let topics = match \u0026item.request_id {\n                Some(rid) =\u003e (Symbol::new(\u0026env, \"deduct\"), caller.clone(), rid.clone()),\n                None =\u003e (\n                    Symbol::new(\u0026env, \"deduct\"),\n                    caller.clone(),\n                    Symbol::new(\u0026env, \"\"),\n                ),\n            };\n            env.events().publish(topics, (item.amount, balance));\n        }\n\n        meta.balance = balance;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n        meta.balance\n    }\n\n    /// Withdraw from vault. Callable only by the vault owner.\n    pub fn withdraw(env: Env, amount: i128) -\u003e i128 {\n        let mut meta = Self::get_meta(env.clone());\n        meta.owner.require_auth();\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer(\u0026env.current_contract_address(), \u0026meta.owner, \u0026amount);\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events().publish(\n            (Symbol::new(\u0026env, \"withdraw\"), meta.owner.clone()),\n            (amount, meta.balance),\n        );\n        meta.balance\n    }\n\n    /// Withdraw from vault to a designated address. Owner-only.\n    pub fn withdraw_to(env: Env, to: Address, amount: i128) -\u003e i128 {\n        let mut meta = Self::get_meta(env.clone());\n        meta.owner.require_auth();\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer(\u0026env.current_contract_address(), \u0026to, \u0026amount);\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events().publish(\n            (\n                Symbol::new(\u0026env, \"withdraw_to\"),\n                meta.owner.clone(),\n                to.clone(),\n            ),\n            (amount, meta.balance),\n        );\n        meta.balance\n    }\n\n    /// Return current balance.\n    pub fn balance(env: Env) -\u003e i128 {\n        Self::get_meta(env).balance\n    }\n}\n\n#[cfg(test)]\nmod 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crate std;\n\nuse super::*;\nuse soroban_sdk::testutils::{Address as _, Events as _};\nuse soroban_sdk::{token, IntoVal, Symbol};\n\nfn create_usdc\u003c'a\u003e(\n    env: \u0026'a Env,\n    admin: \u0026Address,\n) -\u003e (Address, token::Client\u003c'a\u003e, token::StellarAssetClient\u003c'a\u003e) {\n    let contract_address = env.register_stellar_asset_contract_v2(admin.clone());\n    let address = contract_address.address();\n    let client = token::Client::new(env, \u0026address);\n    let admin_client = token::StellarAssetClient::new(env, \u0026address);\n    (address, client, admin_client)\n}\n\nfn create_vault(env: \u0026Env) -\u003e (Address, CalloraVaultClient\u003c'_\u003e) {\n    let address = env.register(CalloraVault, ());\n    let client = CalloraVaultClient::new(env, \u0026address);\n    (address, client)\n}\n\nfn fund_vault(\n    usdc_admin_client: \u0026token::StellarAssetClient,\n    vault_address: \u0026Address,\n    amount: i128,\n) {\n    usdc_admin_client.mint(vault_address, \u0026amount);\n}\n\n#[test]\nfn vault_full_lifecycle() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    let meta = client.init(\u0026owner, \u0026usdc, \u0026Some(500), \u0026Some(10), \u0026None, \u0026None);\n    assert_eq!(meta.balance, 500);\n    assert_eq!(meta.owner, owner);\n    assert_eq!(client.balance(), 500);\n    assert_eq!(client.get_admin(), owner);\n\n    let depositor = Address::generate(\u0026env);\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    let after_deposit = client.deposit(\u0026depositor, \u0026200);\n    assert_eq!(after_deposit, 700);\n    assert_eq!(client.balance(), 700);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: Some(Symbol::new(\u0026env, \"r1\")),\n        },\n        DeductItem {\n            amount: 50,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 25,\n            request_id: Some(Symbol::new(\u0026env, \"r3\")),\n        },\n    ];\n    let after_batch = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(after_batch, 525);\n    assert_eq!(client.balance(), 525);\n\n    let after_deduct = client.deduct(\u0026caller, \u002625, \u0026Some(Symbol::new(\u0026env, \"r4\")));\n    assert_eq!(after_deduct, 500);\n\n    client.set_admin(\u0026owner, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    let after_withdraw = client.withdraw_to(\u0026recipient, \u0026100);\n    assert_eq!(after_withdraw, 400);\n    assert_eq!(client.balance(), 400);\n\n    let after_withdraw2 = client.withdraw(\u002650);\n    assert_eq!(after_withdraw2, 350);\n    assert_eq!(client.balance(), 350);\n\n    let final_meta = client.get_meta();\n    assert_eq!(final_meta.balance, 350);\n    assert_eq!(final_meta.owner, owner);\n    assert_eq!(final_meta.min_deposit, 10);\n}\n\n#[test]\nfn init_with_balance_emits_event() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n\n    let events = env.as_contract(\u0026contract_id, || {\n        CalloraVault::init(\n            env.clone(),\n            owner.clone(),\n            usdc_token.clone(),\n            Some(1000),\n            None,\n            None,\n            None,\n        );\n        env.events().all()\n    });\n\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    assert_eq!(client.balance(), 1000);\n\n    let last_event = events.last().expect(\"expected at least one event\");\n    assert_eq!(last_event.0, contract_id);\n\n    let topics = \u0026last_event.1;\n    assert_eq!(topics.len(), 2);\n    let topic0: Symbol = topics.get(0).unwrap().into_val(\u0026env);\n    let topic1: Address = topics.get(1).unwrap().into_val(\u0026env);\n    assert_eq!(topic0, Symbol::new(\u0026env, \"init\"));\n    assert_eq!(topic1, owner);\n\n    let data: i128 = last_event.2.into_val(\u0026env);\n    assert_eq!(data, 1000);\n}\n\n#[test]\nfn init_defaults_balance_to_zero() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\nfn get_meta_returns_owner_and_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n    let meta = client.get_meta();\n\n    assert_eq!(meta.owner, owner);\n    assert_eq!(meta.balance, 500);\n}\n\n#[test]\nfn get_meta_before_init_fails() {\n    let env = Env::default();\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n\n    let result = client.try_get_meta();\n    assert!(\n        result.is_err(),\n        \"expected error when vault is uninitialised\"\n    );\n}\n\n#[test]\nfn deposit_and_balance_match() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    let returned = client.deposit(\u0026depositor, \u0026200);\n\n    assert_eq!(\n        returned, 300,\n        \"deposit should return the new running balance\"\n    );\n    assert_eq!(client.balance(), 300);\n}\n\n#[test]\nfn deduct_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    client.deposit(\u0026depositor, \u0026200);\n    assert_eq!(client.balance(), 300);\n\n    let returned = client.deduct(\u0026caller, \u002650, \u0026None);\n    assert_eq!(returned, 250, \"deduct should return the remaining balance\");\n    assert_eq!(client.balance(), 250);\n}\n\n#[test]\nfn deduct_with_request_id() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let request_id = Symbol::new(\u0026env, \"req123\");\n    let remaining = client.deduct(\u0026caller, \u0026100, \u0026Some(request_id));\n    assert_eq!(remaining, 900);\n}\n\n#[test]\nfn deduct_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 10);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(10), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_deduct(\u0026caller, \u0026100, \u0026None);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn deduct_exact_balance_succeeds() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 75);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(75), \u0026None, \u0026None, \u0026None);\n    let remaining = client.deduct(\u0026caller, \u002675, \u0026None);\n\n    assert_eq!(remaining, 0);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\nfn deduct_event_contains_request_id() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let request_id = Symbol::new(\u0026env, \"api_call_42\");\n    client.deduct(\u0026caller, \u0026150, \u0026Some(request_id.clone()));\n\n    let events = env.events().all();\n    let ev = events.last().expect(\"expected deduct event\");\n\n    let topic0: Symbol = ev.1.get(0).unwrap().into_val(\u0026env);\n    let topic1: Address = ev.1.get(1).unwrap().into_val(\u0026env);\n    let topic2: Symbol = ev.1.get(2).unwrap().into_val(\u0026env);\n\n    assert_eq!(topic0, Symbol::new(\u0026env, \"deduct\"));\n    assert_eq!(topic1, caller);\n    assert_eq!(topic2, request_id);\n\n    let (emitted_amount, remaining): (i128, i128) = ev.2.into_val(\u0026env);\n    assert_eq!(emitted_amount, 150);\n    assert_eq!(remaining, 350);\n}\n\n#[test]\nfn deduct_event_no_request_id_uses_empty_symbol() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 300);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(300), \u0026None, \u0026None, \u0026None);\n    client.deduct(\u0026caller, \u0026100, \u0026None);\n\n    let events = env.events().all();\n    let ev = events.last().expect(\"expected deduct event\");\n\n    let topic0: Symbol = ev.1.get(0).unwrap().into_val(\u0026env);\n    let topic2: Symbol = ev.1.get(2).unwrap().into_val(\u0026env);\n\n    assert_eq!(topic0, Symbol::new(\u0026env, \"deduct\"));\n    assert_eq!(topic2, Symbol::new(\u0026env, \"\"));\n}\n\n#[test]\nfn batch_deduct_events_contain_request_ids() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let rid_a = Symbol::new(\u0026env, \"batch_a\");\n    let rid_b = Symbol::new(\u0026env, \"batch_b\");\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 200,\n            request_id: Some(rid_a.clone()),\n        },\n        DeductItem {\n            amount: 300,\n            request_id: Some(rid_b.clone()),\n        },\n    ];\n    client.batch_deduct(\u0026caller, \u0026items);\n\n    let all_events = env.events().all();\n    assert_eq!(all_events.len(), 2);\n\n    let ev_a = all_events.get(0).unwrap();\n    let ev_b = all_events.get(1).unwrap();\n\n    let req_a: Symbol = ev_a.1.get(2).unwrap().into_val(\u0026env);\n    let req_b: Symbol = ev_b.1.get(2).unwrap().into_val(\u0026env);\n    assert_eq!(req_a, rid_a);\n    assert_eq!(req_b, rid_b);\n\n    let (amt_a, _): (i128, i128) = ev_a.2.into_val(\u0026env);\n    let (amt_b, _): (i128, i128) = ev_b.2.into_val(\u0026env);\n    assert_eq!(amt_a, 200);\n    assert_eq!(amt_b, 300);\n}\n\n#[test]\nfn get_admin_returns_correct_address() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let admin = client.get_admin();\n    assert_eq!(admin, owner);\n}\n\n#[test]\nfn set_admin_updates_admin() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    client.set_admin(\u0026owner, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n}\n\n#[test]\nfn set_admin_unauthorized_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let intruder = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_set_admin(\u0026intruder, \u0026new_admin);\n    assert!(\n        result.is_err(),\n        \"expected error when non-admin tries to set admin\"\n    );\n}\n\n#[test]\nfn distribute_transfers_usdc_to_developer() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, usdc_client, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    client.distribute(\u0026admin, \u0026developer, \u0026300);\n\n    assert_eq!(usdc_client.balance(\u0026developer), 300);\n    assert_eq!(usdc_client.balance(\u0026vault_address), 700);\n}\n\n#[test]\nfn distribute_unauthorized_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let intruder = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026intruder, \u0026developer, \u0026300);\n    assert!(\n        result.is_err(),\n        \"expected error when non-admin tries to distribute\"\n    );\n}\n\n#[test]\nfn distribute_insufficient_usdc_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 100);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026admin, \u0026developer, \u0026500);\n    assert!(\n        result.is_err(),\n        \"expected error for insufficient USDC balance\"\n    );\n}\n\n#[test]\nfn distribute_zero_amount_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026admin, \u0026developer, \u00260);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn batch_deduct_multiple_items() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: Some(Symbol::new(\u0026env, \"req1\"))\n        },\n        DeductItem {\n            amount: 200,\n            request_id: None\n        },\n        DeductItem {\n            amount: 50,\n            request_id: Some(Symbol::new(\u0026env, \"req2\"))\n        }\n    ];\n\n    let remaining = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(remaining, 650);\n    assert_eq!(client.balance(), 650);\n}\n\n#[test]\nfn batch_deduct_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 50,\n            request_id: None\n        },\n        DeductItem {\n            amount: 80,\n            request_id: None\n        }\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for batch overdraw\");\n    assert_eq!(client.balance(), 100);\n}\n\n#[test]\nfn batch_deduct_empty_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items: soroban_sdk::Vec\u003cDeductItem\u003e = soroban_sdk::vec![\u0026env];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for empty batch\");\n}\n\n#[test]\nfn batch_deduct_zero_amount_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 0,\n            request_id: None\n        }\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn withdraw_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let remaining = client.withdraw(\u0026200);\n    assert_eq!(remaining, 300);\n    assert_eq!(client.balance(), 300);\n}\n\n#[test]\nfn withdraw_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw(\u0026500);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn withdraw_zero_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw(\u00260);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn withdraw_to_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let remaining = client.withdraw_to(\u0026recipient, \u0026150);\n    assert_eq!(remaining, 350);\n    assert_eq!(client.balance(), 350);\n}\n\n#[test]\nfn withdraw_to_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw_to(\u0026recipient, \u0026500);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn deposit_below_minimum_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026Some(50), \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 30);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u002630, \u00261000);\n    let result = client.try_deposit(\u0026depositor, \u002630);\n    assert!(result.is_err(), \"expected error for deposit below minimum\");\n}\n\n#[test]\nfn deposit_at_minimum_succeeds() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026Some(50), \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 50);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u002650, \u00261000);\n    let new_balance = client.deposit(\u0026depositor, \u002650);\n    assert_eq!(new_balance, 150);\n}\n\n#[test]\nfn double_init_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026Some(200), \u0026None, \u0026None, \u0026None);\n    assert!(result.is_err(), \"expected error for double init\");\n}\n\n#[test]\nfn init_insufficient_usdc_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 50);\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    assert!(\n        result.is_err(),\n        \"expected error when initial_balance exceeds contract USDC\"\n    );\n}\n\n#[test]\nfn init_with_zero_max_deduct_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026Some(0));\n    assert!(result.is_err(), \"expected error for max_deduct \u003c= 0\");\n}\n\n#[test]\nfn init_with_revenue_pool_and_get_revenue_pool() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let revenue_pool = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\n        \u0026owner,\n        \u0026usdc_token,\n        \u0026None,\n        \u0026None,\n        \u0026Some(revenue_pool.clone()),\n        \u0026None,\n    );\n\n    let retrieved_pool = client.get_revenue_pool();\n    assert_eq!(retrieved_pool, Some(revenue_pool));\n}\n\n#[test]\nfn get_revenue_pool_returns_none_when_not_set() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026None);\n\n    let retrieved_pool = client.get_revenue_pool();\n    assert_eq!(retrieved_pool, None);\n}\n\n#[test]\nfn get_max_deduct_returns_configured_value() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026Some(5000));\n\n    let max_deduct = client.get_max_deduct();\n    assert_eq!(max_deduct, 5000);\n}\n\n/// Fuzz test: random deposit/deduct sequence asserting balance \u003e= 0 and matches expected.\n#[test]\nfn fuzz_deposit_and_deduct() {\n    use rand::Rng;\n\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    let initial_balance: i128 = 1_000;\n    fund_vault(\u0026usdc_admin, \u0026vault_address, initial_balance);\n    usdc_admin.mint(\u0026owner, \u0026250_000);\n    usdc_client.approve(\u0026owner, \u0026vault_address, \u0026250_000, \u002610_000);\n    vault.init(\n        \u0026owner,\n        \u0026usdc_address,\n        \u0026Some(initial_balance),\n        \u0026None,\n        \u0026None,\n        \u0026None,\n    );\n    let mut expected = initial_balance;\n    let mut rng = rand::thread_rng();\n\n    for _ in 0..500 {\n        if rng.gen_bool(0.5) {\n            let amount = rng.gen_range(1..=500);\n            vault.deposit(\u0026owner, \u0026amount);\n            expected += amount;\n        } else if expected \u003e 0 {\n            let amount = rng.gen_range(1..=expected.min(500));\n            vault.deduct(\u0026owner, \u0026amount, \u0026None);\n            expected -= amount;\n        }\n\n        let balance = vault.balance();\n        assert!(balance \u003e= 0, \"balance went negative: {}\", balance);\n        assert_eq!(\n            balance, expected,\n            \"balance mismatch: got {}, expected {}\",\n            balance, expected\n        );\n    }\n\n    assert_eq!(vault.balance(), expected);\n}\n\n#[test]\nfn deduct_returns_new_balance() {\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    fund_vault(\u0026usdc_admin, \u0026vault_address, 100);\n    vault.init(\u0026owner, \u0026usdc_address, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    let new_balance = vault.deduct(\u0026owner, \u002630, \u0026None);\n    assert_eq!(new_balance, 70);\n    assert_eq!(vault.balance(), 70);\n}\n\n/// Fuzz test (seeded): deterministic deposit/deduct sequence asserting balance \u003e= 0 and matches expected.\n#[test]\nfn fuzz_deposit_and_deduct_seeded() {\n    use rand::rngs::StdRng;\n    use rand::{Rng, SeedableRng};\n\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    usdc_admin.mint(\u0026owner, \u00265_000_000);\n    usdc_client.approve(\u0026owner, \u0026vault_address, \u00265_000_000, \u002610_000);\n    vault.init(\u0026owner, \u0026usdc_address, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n    let mut expected: i128 = 0;\n    let mut rng = StdRng::seed_from_u64(42);\n\n    for _ in 0..500 {\n        let action: u8 = rng.gen_range(0..2);\n\n        if action == 0 {\n            let amount: i128 = rng.gen_range(1..=10_000);\n            vault.deposit(\u0026owner, \u0026amount);\n            expected += amount;\n        } else if expected \u003e 0 {\n            let amount: i128 = rng.gen_range(1..=expected);\n            vault.deduct(\u0026owner, \u0026amount, \u0026None);\n            expected -= amount;\n        }\n\n        assert!(expected \u003e= 0, \"balance went negative\");\n        assert_eq!(vault.balance(), expected, \"balance mismatch at iteration\");\n    }\n}\n\n#[test]\nfn batch_deduct_all_succeed() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 60);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(60), \u0026None, \u0026None, \u0026None);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n    let new_balance = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(new_balance, 0);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient balance\")]\nfn batch_deduct_all_revert() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 25);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(25), \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 25);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n    client.batch_deduct(\u0026caller, \u0026items);\n}\n\n#[test]\nfn batch_deduct_revert_preserves_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 25);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(25), \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 25);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n\n    let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {\n        client.batch_deduct(\u0026caller, \u0026items);\n    }));\n\n    assert!(result.is_err());\n    assert_eq!(client.balance(), 25);\n}\n\n#[test]\nfn owner_unchanged_after_deposit_and_deduct() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    usdc_admin.mint(\u0026owner, \u002650);\n    usdc_client.approve(\u0026owner, \u0026contract_id, \u002650, \u002610_000);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    client.deposit(\u0026owner, \u002650);\n    client.deduct(\u0026owner, \u002630, \u0026None);\n\n    assert_eq!(client.get_meta().owner, owner);\n}\n\n#[test]\nfn batch_deduct_exceeds_max_deduct_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026Some(50));\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: None,\n        },\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(\n        result.is_err(),\n        \"expected error for amount exceeding max_deduct\"\n    );\n}\n","traces":[{"line":7,"address":[11177040,11177509,11177503],"length":1,"stats":{"Line":1}},{"line":11,"address":[],"length":0,"stats":{"Line":1}},{"line":12,"address":[],"length":0,"stats":{"Line":1}},{"line":13,"address":[],"length":0,"stats":{"Line":11}},{"line":14,"address":[],"length":0,"stats":{"Line":1}},{"line":15,"address":[],"length":0,"stats":{"Line":2}},{"line":18,"address":[11177536,11177721,11177727],"length":1,"stats":{"Line":1}},{"line":19,"address":[11177575],"length":1,"stats":{"Line":1}},{"line":20,"address":[11177595],"length":1,"stats":{"Line":1}},{"line":21,"address":[11177640],"length":1,"stats":{"Line":1}},{"line":24,"address":[11176992],"length":1,"stats":{"Line":9}},{"line":29,"address":[11177015],"length":1,"stats":{"Line":3}}],"covered":12,"coverable":12}]};
         var previousData = {"files":[{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","contracts","revenue_pool","src","lib.rs"],"content":"#![no_std]\n\nuse soroban_sdk::{contract, contractimpl, token, Address, Env, Symbol, Vec};\n\n/// Revenue settlement contract: receives USDC from vault deducts and distributes to developers.\n///\n/// Flow: vault deduct → vault transfers USDC to this contract → admin calls distribute(to, amount).\nconst ADMIN_KEY: \u0026str = \"admin\";\nconst USDC_KEY: \u0026str = \"usdc\";\n\n#[contract]\npub struct RevenuePool;\n\n#[contractimpl]\nimpl RevenuePool {\n    /// Initialize the revenue pool with an admin and the USDC token address.\n    ///\n    /// # Arguments\n    /// * `admin` – Address that may call `distribute`. Typically backend or multisig.\n    /// * `usdc_token` – Stellar USDC (or wrapped USDC) token contract address.\n    pub fn init(env: Env, admin: Address, usdc_token: Address) {\n        admin.require_auth();\n        if env.storage().instance().has(\u0026Symbol::new(\u0026env, ADMIN_KEY)) {\n            panic!(\"revenue pool already initialized\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026admin);\n        inst.set(\u0026Symbol::new(\u0026env, USDC_KEY), \u0026usdc_token);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"init\"), admin), usdc_token);\n    }\n\n    /// Return the current admin address.\n    pub fn get_admin(env: Env) -\u003e Address {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, ADMIN_KEY))\n            .unwrap_or_else(|| panic!(\"revenue pool not initialized\"))\n    }\n\n    /// Replace the current admin. Only the existing admin may call this.\n    pub fn set_admin(env: Env, caller: Address, new_admin: Address) {\n        caller.require_auth();\n        let current = Self::get_admin(env.clone());\n        if caller != current {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026new_admin);\n    }\n\n    /// Placeholder: record that payment was received (e.g. from vault).\n    /// In practice, USDC is received when the vault (or any address) transfers tokens\n    /// to this contract's address; no separate \"receive\" call is required.\n    ///\n    /// This function can be used to emit an event for indexers when the backend\n    /// wants to log that a payment was credited from the vault.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be admin (or could be extended to allow vault to call).\n    /// * `amount` – Amount received (for event logging).\n    /// * `from_vault` – Optional; true if the source was the vault.\n    pub fn receive_payment(env: Env, caller: Address, amount: i128, from_vault: bool) {\n        caller.require_auth();\n        let _admin = Self::get_admin(env.clone());\n        env.events().publish(\n            (Symbol::new(\u0026env, \"receive_payment\"), caller),\n            (amount, from_vault),\n        );\n    }\n\n    /// Distribute USDC from this contract to a developer wallet.\n    ///\n    /// Only the admin may call. Transfers USDC from this contract to `to`.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be the current admin.\n    /// * `to` – Developer address to receive USDC.\n    /// * `amount` – Amount in token base units (e.g. USDC stroops).\n    pub fn distribute(env: Env, caller: Address, to: Address, amount: i128) {\n        caller.require_auth();\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        if amount \u003c= 0 {\n            panic!(\"amount must be positive\");\n        }\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"revenue pool not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        let contract_address = env.current_contract_address();\n        if usdc.balance(\u0026contract_address) \u003c amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        usdc.transfer(\u0026contract_address, \u0026to, \u0026amount);\n        env.events()\n            .publish((Symbol::new(\u0026env, \"distribute\"), to), amount);\n    }\n\n    /// Distribute USDC from this contract to multiple developer wallets in one transaction.\n    ///\n    /// Only the admin may call. Iterates through the vector of payments and atomically\n    /// transfers USDC to each developer. Fails if the total amount exceeds balance\n    /// or if any individual amount is not positive.\n    ///\n    /// # Arguments\n    /// * `caller` - Must be the current admin.\n    /// * `payments` - A vector of (Address, amount) tuples.\n    pub fn batch_distribute(env: Env, caller: Address, payments: Vec\u003c(Address, i128)\u003e) {\n        caller.require_auth();\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n\n        let mut total_amount: i128 = 0;\n        for payment in payments.iter() {\n            let (_, amount) = payment;\n            if amount \u003c= 0 {\n                panic!(\"amount must be positive\");\n            }\n            total_amount += amount;\n        }\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"revenue pool not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        let contract_address = env.current_contract_address();\n        if usdc.balance(\u0026contract_address) \u003c total_amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        for payment in payments.iter() {\n            let (to, amount) = payment;\n            usdc.transfer(\u0026contract_address, \u0026to, \u0026amount);\n            env.events()\n                .publish((Symbol::new(\u0026env, \"batch_distribute\"), to), amount);\n        }\n    }\n\n    /// Return this contract's USDC balance (for testing and dashboards).\n    pub fn balance(env: Env) -\u003e i128 {\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .unwrap_or_else(|| panic!(\"revenue pool not initialized\"));\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.balance(\u0026env.current_contract_address())\n    }\n}\n\n#[cfg(test)]\nmod test;\n","traces":[{"line":21,"address":[10908562,10908717,10907360],"length":1,"stats":{"Line":15}},{"line":22,"address":[10907395],"length":1,"stats":{"Line":1}},{"line":23,"address":[10908568,10907489],"length":1,"stats":{"Line":15}},{"line":24,"address":[10908600],"length":1,"stats":{"Line":1}},{"line":26,"address":[10907790],"length":1,"stats":{"Line":1}},{"line":27,"address":[10907936],"length":1,"stats":{"Line":13}},{"line":28,"address":[10908060],"length":1,"stats":{"Line":2}},{"line":30,"address":[10908195],"length":1,"stats":{"Line":13}},{"line":31,"address":[10908207],"length":1,"stats":{"Line":2}},{"line":35,"address":[10909937,10909568],"length":1,"stats":{"Line":2}},{"line":36,"address":[10909594],"length":1,"stats":{"Line":1}},{"line":38,"address":[10909704,10909791],"length":1,"stats":{"Line":3}},{"line":39,"address":[10967216,10967217],"length":1,"stats":{"Line":3}},{"line":43,"address":[10910634,10909968,10910670],"length":1,"stats":{"Line":2}},{"line":44,"address":[10910003],"length":1,"stats":{"Line":1}},{"line":45,"address":[10910065],"length":1,"stats":{"Line":1}},{"line":46,"address":[10910156,10910094],"length":1,"stats":{"Line":2}},{"line":47,"address":[10910650,10910182],"length":1,"stats":{"Line":2}},{"line":49,"address":[10910175,10910214],"length":1,"stats":{"Line":2}},{"line":50,"address":[10910353],"length":1,"stats":{"Line":1}},{"line":64,"address":[10904000,10904585,10904547],"length":1,"stats":{"Line":2}},{"line":65,"address":[10904067],"length":1,"stats":{"Line":1}},{"line":66,"address":[10904145],"length":1,"stats":{"Line":1}},{"line":67,"address":[10904182,10904462],"length":1,"stats":{"Line":2}},{"line":68,"address":[10904323,10904232],"length":1,"stats":{"Line":2}},{"line":81,"address":[10903826,10902336,10903952],"length":1,"stats":{"Line":2}},{"line":82,"address":[10902376],"length":1,"stats":{"Line":1}},{"line":83,"address":[10902457],"length":1,"stats":{"Line":1}},{"line":84,"address":[10902551,10902489],"length":1,"stats":{"Line":5}},{"line":85,"address":[10903899,10902579],"length":1,"stats":{"Line":2}},{"line":87,"address":[10902557],"length":1,"stats":{"Line":2}},{"line":88,"address":[10902631,10903871],"length":1,"stats":{"Line":4}},{"line":94,"address":[10902835,10902739],"length":1,"stats":{"Line":3}},{"line":96,"address":[10903113],"length":1,"stats":{"Line":1}},{"line":98,"address":[10903145],"length":1,"stats":{"Line":2}},{"line":99,"address":[10903205,10903293],"length":1,"stats":{"Line":3}},{"line":100,"address":[10903841,10903350],"length":1,"stats":{"Line":2}},{"line":103,"address":[10903318],"length":1,"stats":{"Line":1}},{"line":104,"address":[10903394,10903625],"length":1,"stats":{"Line":2}},{"line":105,"address":[10903651,10903406],"length":1,"stats":{"Line":3}},{"line":117,"address":[10904608,10907144,10906841],"length":1,"stats":{"Line":2}},{"line":118,"address":[10904646],"length":1,"stats":{"Line":1}},{"line":119,"address":[10904718],"length":1,"stats":{"Line":2}},{"line":120,"address":[10904824,10904753],"length":1,"stats":{"Line":3}},{"line":121,"address":[10907123,10904877],"length":1,"stats":{"Line":2}},{"line":124,"address":[10904838],"length":1,"stats":{"Line":1}},{"line":125,"address":[10905021,10904925,10904870],"length":1,"stats":{"Line":4}},{"line":126,"address":[10905112],"length":1,"stats":{"Line":1}},{"line":127,"address":[10905154],"length":1,"stats":{"Line":1}},{"line":128,"address":[10907092,10906950],"length":1,"stats":{"Line":2}},{"line":130,"address":[10906909,10906988,10907022],"length":1,"stats":{"Line":2}},{"line":136,"address":[10905380,10905284],"length":1,"stats":{"Line":4}},{"line":138,"address":[10905658],"length":1,"stats":{"Line":2}},{"line":140,"address":[10905690],"length":1,"stats":{"Line":2}},{"line":141,"address":[10905838,10905750],"length":1,"stats":{"Line":4}},{"line":142,"address":[10905887,10906879],"length":1,"stats":{"Line":2}},{"line":145,"address":[10906031,10905880,10905935,10906836],"length":1,"stats":{"Line":4}},{"line":146,"address":[10906126],"length":1,"stats":{"Line":1}},{"line":147,"address":[10906214],"length":1,"stats":{"Line":1}},{"line":148,"address":[10906534,10906770],"length":1,"stats":{"Line":2}},{"line":149,"address":[10906802,10906546],"length":1,"stats":{"Line":2}},{"line":154,"address":[10909548,10908736],"length":1,"stats":{"Line":1}},{"line":158,"address":[10908877,10908964],"length":1,"stats":{"Line":2}},{"line":159,"address":[10908908,10908831,10908971],"length":1,"stats":{"Line":5}},{"line":160,"address":[10909215],"length":1,"stats":{"Line":2}},{"line":161,"address":[10909244,10909304],"length":1,"stats":{"Line":2}}],"covered":66,"coverable":66},{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","contracts","revenue_pool","src","test.rs"],"content":"extern crate std;\n\nuse super::*;\nuse soroban_sdk::testutils::{Address as _, Events as _};\nuse soroban_sdk::token;\n\nfn create_usdc\u003c'a\u003e(\n    env: \u0026'a Env,\n    admin: \u0026Address,\n) -\u003e (Address, token::Client\u003c'a\u003e, token::StellarAssetClient\u003c'a\u003e) {\n    let contract_address = env.register_stellar_asset_contract_v2(admin.clone());\n    let address = contract_address.address();\n    let client = token::Client::new(env, \u0026address);\n    let admin_client = token::StellarAssetClient::new(env, \u0026address);\n    (address, client, admin_client)\n}\n\nfn create_pool(env: \u0026Env) -\u003e (Address, RevenuePoolClient\u003c'_\u003e) {\n    let address = env.register(RevenuePool, ());\n    let client = RevenuePoolClient::new(env, \u0026address);\n    (address, client)\n}\n\nfn fund_pool(usdc_admin_client: \u0026token::StellarAssetClient, pool_address: \u0026Address, amount: i128) {\n    usdc_admin_client.mint(pool_address, \u0026amount);\n}\n\n#[test]\nfn init_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_pool_addr, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    assert_eq!(client.get_admin(), admin);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\n#[should_panic(expected = \"revenue pool already initialized\")]\nfn init_double_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.init(\u0026admin, \u0026usdc);\n}\n\n#[test]\nfn distribute_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1_000);\n    client.distribute(\u0026admin, \u0026developer, \u0026400);\n\n    assert_eq!(usdc_client.balance(\u0026pool_addr), 600);\n    assert_eq!(usdc_client.balance(\u0026developer), 400);\n}\n\n#[test]\n#[should_panic(expected = \"amount must be positive\")]\nfn distribute_zero_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.distribute(\u0026admin, \u0026developer, \u00260);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient USDC balance\")]\nfn distribute_excess_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 100);\n    client.distribute(\u0026admin, \u0026developer, \u0026101);\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn distribute_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n    client.distribute(\u0026attacker, \u0026developer, \u0026100);\n}\n\n#[test]\nfn set_admin_transfers_control() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 300);\n    client.set_admin(\u0026admin, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    client.distribute(\u0026new_admin, \u0026developer, \u0026100);\n    assert_eq!(usdc_client.balance(\u0026developer), 100);\n}\n\n#[test]\nfn receive_payment_emits_event() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.receive_payment(\u0026admin, \u0026500, \u0026true);\n    let events = env.events().all();\n    assert!(!events.is_empty());\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn set_admin_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.set_admin(\u0026attacker, \u0026new_admin);\n}\n\n#[test]\n#[should_panic(expected = \"revenue pool not initialized\")]\nfn balance_before_init_panics() {\n    let env = Env::default();\n    let (_, client) = create_pool(\u0026env);\n    client.balance();\n}\n\n#[test]\nfn distribute_negative_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {\n        client.distribute(\u0026admin, \u0026developer, \u0026-1);\n    }));\n    assert!(result.is_err());\n}\n\n#[test]\nfn receive_payment_from_non_vault() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.receive_payment(\u0026admin, \u0026250, \u0026false);\n\n    let events = env.events().all();\n    assert!(!events.is_empty());\n}\n\n/// Full lifecycle test: init, get_admin, balance, distribute, receive_payment, set_admin.\n#[test]\nfn full_lifecycle() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    // Init\n    client.init(\u0026admin, \u0026usdc_address);\n    assert_eq!(client.get_admin(), admin);\n\n    // Fund and check balance\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1000);\n    assert_eq!(client.balance(), 1000);\n\n    // Distribute\n    client.distribute(\u0026admin, \u0026developer, \u0026400);\n    assert_eq!(usdc_client.balance(\u0026developer), 400);\n    assert_eq!(client.balance(), 600);\n\n    // Receive payment event\n    client.receive_payment(\u0026admin, \u0026100, \u0026true);\n\n    // Set admin\n    client.set_admin(\u0026admin, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    // New admin can distribute\n    client.distribute(\u0026new_admin, \u0026developer, \u0026100);\n    assert_eq!(usdc_client.balance(\u0026developer), 500);\n    assert_eq!(client.balance(), 500);\n}\n\n#[test]\nfn batch_distribute_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev1 = Address::generate(\u0026env);\n    let dev2 = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1000);\n\n    let mut payments: Vec\u003c(Address, i128)\u003e = Vec::new(\u0026env);\n    payments.push_back((dev1.clone(), 300_i128));\n    payments.push_back((dev2.clone(), 200_i128));\n    client.batch_distribute(\u0026admin, \u0026payments);\n\n    assert_eq!(usdc_client.balance(\u0026dev1), 300);\n    assert_eq!(usdc_client.balance(\u0026dev2), 200);\n    assert_eq!(client.balance(), 500);\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn batch_distribute_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n\n    let mut payments: Vec\u003c(Address, i128)\u003e = Vec::new(\u0026env);\n    payments.push_back((dev.clone(), 100_i128));\n    client.batch_distribute(\u0026attacker, \u0026payments);\n}\n\n#[test]\n#[should_panic(expected = \"amount must be positive\")]\nfn batch_distribute_zero_amount_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n\n    let mut payments: Vec\u003c(Address, i128)\u003e = Vec::new(\u0026env);\n    payments.push_back((dev.clone(), 0_i128));\n    client.batch_distribute(\u0026admin, \u0026payments);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient USDC balance\")]\nfn batch_distribute_insufficient_balance_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 50);\n\n    let mut payments: Vec\u003c(Address, i128)\u003e = Vec::new(\u0026env);\n    payments.push_back((dev.clone(), 100_i128));\n    client.batch_distribute(\u0026admin, \u0026payments);\n}\n","traces":[{"line":7,"address":[10943845,10943376,10943839],"length":1,"stats":{"Line":15}},{"line":11,"address":[10943438],"length":1,"stats":{"Line":15}},{"line":12,"address":[10943477],"length":1,"stats":{"Line":14}},{"line":13,"address":[10943542],"length":1,"stats":{"Line":1}},{"line":14,"address":[10943615],"length":1,"stats":{"Line":14}},{"line":15,"address":[10943683],"length":1,"stats":{"Line":1}},{"line":18,"address":[10943353,10943168,10943359],"length":1,"stats":{"Line":16}},{"line":19,"address":[10943207],"length":1,"stats":{"Line":16}},{"line":20,"address":[10943227],"length":1,"stats":{"Line":16}},{"line":21,"address":[10943272],"length":1,"stats":{"Line":15}},{"line":24,"address":[10964240],"length":1,"stats":{"Line":7}},{"line":25,"address":[10964263],"length":1,"stats":{"Line":1}}],"covered":12,"coverable":12},{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","contracts","vault","src","lib.rs"],"content":"#![no_std]\n\nuse soroban_sdk::{contract, contractimpl, contracttype, token, Address, Env, Symbol, Vec};\n\n/// Single item for batch deduct: amount and optional request id for idempotency/tracking.\n#[contracttype]\n#[derive(Clone)]\npub struct DeductItem {\n    pub amount: i128,\n    pub request_id: Option\u003cSymbol\u003e,\n}\n\n#[contracttype]\n#[derive(Clone)]\npub struct VaultMeta {\n    pub owner: Address,\n    pub balance: i128,\n    /// Minimum amount required per deposit; deposits below this panic.\n    pub min_deposit: i128,\n}\n\nconst META_KEY: \u0026str = \"meta\";\nconst USDC_KEY: \u0026str = \"usdc\";\nconst ADMIN_KEY: \u0026str = \"admin\";\nconst REVENUE_POOL_KEY: \u0026str = \"revenue_pool\";\nconst MAX_DEDUCT_KEY: \u0026str = \"max_deduct\";\n\n/// Default maximum single deduct amount when not set at init (no cap).\npub const DEFAULT_MAX_DEDUCT: i128 = i128::MAX;\n\n#[contracttype]\n#[derive(Clone, Debug, PartialEq)]\npub struct DistributeEvent {\n    pub to: Address,\n    pub amount: i128,\n}\n\n#[contract]\npub struct CalloraVault;\n\n#[contractimpl]\nimpl CalloraVault {\n    /// Initialize vault for an owner with optional initial balance and minimum deposit.\n    /// If initial_balance \u003e 0, the contract must already hold at least that much USDC (e.g. deployer transferred in first).\n    /// Emits an \"init\" event with the owner address and initial balance.\n    ///\n    /// # Arguments\n    /// * `revenue_pool` – Optional address to receive USDC on each deduct (e.g. settlement contract). If None, USDC stays in vault.\n    /// * `max_deduct` – Optional cap per single deduct; if None, uses DEFAULT_MAX_DEDUCT (no cap).\n    pub fn init(\n        env: Env,\n        owner: Address,\n        usdc_token: Address,\n        initial_balance: Option\u003ci128\u003e,\n        min_deposit: Option\u003ci128\u003e,\n        revenue_pool: Option\u003cAddress\u003e,\n        max_deduct: Option\u003ci128\u003e,\n    ) -\u003e VaultMeta {\n        owner.require_auth();\n        if env.storage().instance().has(\u0026Symbol::new(\u0026env, META_KEY)) {\n            panic!(\"vault already initialized\");\n        }\n        let balance = initial_balance.unwrap_or(0);\n        if balance \u003e 0 {\n            let usdc = token::Client::new(\u0026env, \u0026usdc_token);\n            let contract_balance = usdc.balance(\u0026env.current_contract_address());\n            if contract_balance \u003c balance {\n                panic!(\"insufficient USDC in contract for initial_balance\");\n            }\n        }\n        let min_deposit_val = min_deposit.unwrap_or(0);\n        let max_deduct_val = max_deduct.unwrap_or(DEFAULT_MAX_DEDUCT);\n        if max_deduct_val \u003c= 0 {\n            panic!(\"max_deduct must be positive\");\n        }\n        let meta = VaultMeta {\n            owner: owner.clone(),\n            balance,\n            min_deposit: min_deposit_val,\n        };\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n        inst.set(\u0026Symbol::new(\u0026env, META_KEY), \u0026meta);\n        inst.set(\u0026Symbol::new(\u0026env, USDC_KEY), \u0026usdc_token);\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026owner);\n        if let Some(pool) = revenue_pool {\n            inst.set(\u0026Symbol::new(\u0026env, REVENUE_POOL_KEY), \u0026pool);\n        }\n        inst.set(\u0026Symbol::new(\u0026env, MAX_DEDUCT_KEY), \u0026max_deduct_val);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"init\"), owner), balance);\n\n        meta\n    }\n\n    /// Return the current admin address.\n    pub fn get_admin(env: Env) -\u003e Address {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, ADMIN_KEY))\n            .expect(\"vault not initialized\")\n    }\n\n    /// Replace the current admin. Only the existing admin may call this.\n    pub fn set_admin(env: Env, caller: Address, new_admin: Address) {\n        caller.require_auth();\n        let current_admin = Self::get_admin(env.clone());\n        if caller != current_admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026new_admin);\n    }\n\n    /// Return the maximum allowed amount for a single deduct (configurable at init).\n    pub fn get_max_deduct(env: Env) -\u003e i128 {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, MAX_DEDUCT_KEY))\n            .expect(\"vault not initialized\")\n    }\n\n    /// Return the revenue pool address if set (receives USDC on deduct).\n    pub fn get_revenue_pool(env: Env) -\u003e Option\u003cAddress\u003e {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, REVENUE_POOL_KEY))\n            .unwrap_or(None)\n    }\n\n    /// Distribute accumulated USDC to a single developer address.\n    pub fn distribute(env: Env, caller: Address, to: Address, amount: i128) {\n        caller.require_auth();\n\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n\n        if amount \u003c= 0 {\n            panic!(\"amount must be positive\");\n        }\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        let vault_balance = usdc.balance(\u0026env.current_contract_address());\n        if vault_balance \u003c amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        usdc.transfer(\u0026env.current_contract_address(), \u0026to, \u0026amount);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"distribute\"), to), amount);\n    }\n\n    /// Get vault metadata (owner and balance).\n    pub fn get_meta(env: Env) -\u003e VaultMeta {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, META_KEY))\n            .expect(\"vault not initialized\")\n    }\n\n    /// Deposit: user transfers USDC to the contract; contract increases internal balance.\n    pub fn deposit(env: Env, from: Address, amount: i128) -\u003e i128 {\n        from.require_auth();\n\n        let mut meta = Self::get_meta(env.clone());\n        assert!(\n            amount \u003e= meta.min_deposit,\n            \"deposit below minimum: {} \u003c {}\",\n            amount,\n            meta.min_deposit\n        );\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer_from(\n            \u0026env.current_contract_address(),\n            \u0026from,\n            \u0026env.current_contract_address(),\n            \u0026amount,\n        );\n\n        meta.balance += amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"deposit\"), from), amount);\n\n        meta.balance\n    }\n\n    /// Deduct balance for an API call.\n    pub fn deduct(env: Env, caller: Address, amount: i128, request_id: Option\u003cSymbol\u003e) -\u003e i128 {\n        caller.require_auth();\n        let max_deduct = Self::get_max_deduct(env.clone());\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(amount \u003c= max_deduct, \"deduct amount exceeds max_deduct\");\n\n        let mut meta = Self::get_meta(env.clone());\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        let topics = match \u0026request_id {\n            Some(rid) =\u003e (Symbol::new(\u0026env, \"deduct\"), caller.clone(), rid.clone()),\n            None =\u003e (\n                Symbol::new(\u0026env, \"deduct\"),\n                caller.clone(),\n                Symbol::new(\u0026env, \"\"),\n            ),\n        };\n        env.events().publish(topics, (amount, meta.balance));\n        meta.balance\n    }\n\n    /// Batch deduct: multiple (amount, optional request_id) in one transaction.\n    pub fn batch_deduct(env: Env, caller: Address, items: Vec\u003cDeductItem\u003e) -\u003e i128 {\n        caller.require_auth();\n        let max_deduct = Self::get_max_deduct(env.clone());\n        let mut meta = Self::get_meta(env.clone());\n        let n = items.len();\n        assert!(n \u003e 0, \"batch_deduct requires at least one item\");\n\n        let mut running = meta.balance;\n        for item in items.iter() {\n            assert!(item.amount \u003e 0, \"amount must be positive\");\n            let within_limit = item.amount \u003c= max_deduct;\n            assert!(within_limit, \"deduct amount exceeds max_deduct\");\n            assert!(running \u003e= item.amount, \"insufficient balance\");\n            running -= item.amount;\n        }\n\n        let mut balance = meta.balance;\n        for item in items.iter() {\n            balance -= item.amount;\n            let topics = match \u0026item.request_id {\n                Some(rid) =\u003e (Symbol::new(\u0026env, \"deduct\"), caller.clone(), rid.clone()),\n                None =\u003e (\n                    Symbol::new(\u0026env, \"deduct\"),\n                    caller.clone(),\n                    Symbol::new(\u0026env, \"\"),\n                ),\n            };\n            env.events().publish(topics, (item.amount, balance));\n        }\n\n        meta.balance = balance;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n        meta.balance\n    }\n\n    /// Withdraw from vault. Callable only by the vault owner.\n    pub fn withdraw(env: Env, amount: i128) -\u003e i128 {\n        let mut meta = Self::get_meta(env.clone());\n        meta.owner.require_auth();\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer(\u0026env.current_contract_address(), \u0026meta.owner, \u0026amount);\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events().publish(\n            (Symbol::new(\u0026env, \"withdraw\"), meta.owner.clone()),\n            (amount, meta.balance),\n        );\n        meta.balance\n    }\n\n    /// Withdraw from vault to a designated address. Owner-only.\n    pub fn withdraw_to(env: Env, to: Address, amount: i128) -\u003e i128 {\n        let mut meta = Self::get_meta(env.clone());\n        meta.owner.require_auth();\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer(\u0026env.current_contract_address(), \u0026to, \u0026amount);\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events().publish(\n            (\n                Symbol::new(\u0026env, \"withdraw_to\"),\n                meta.owner.clone(),\n                to.clone(),\n            ),\n            (amount, meta.balance),\n        );\n        meta.balance\n    }\n\n    /// Return current balance.\n    pub fn balance(env: Env) -\u003e i128 {\n        Self::get_meta(env).balance\n    }\n}\n\n#[cfg(test)]\nmod 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crate std;\n\nuse super::*;\nuse soroban_sdk::testutils::{Address as _, Events as _};\nuse soroban_sdk::{token, IntoVal, Symbol};\n\nfn create_usdc\u003c'a\u003e(\n    env: \u0026'a Env,\n    admin: \u0026Address,\n) -\u003e (Address, token::Client\u003c'a\u003e, token::StellarAssetClient\u003c'a\u003e) {\n    let contract_address = env.register_stellar_asset_contract_v2(admin.clone());\n    let address = contract_address.address();\n    let client = token::Client::new(env, \u0026address);\n    let admin_client = token::StellarAssetClient::new(env, \u0026address);\n    (address, client, admin_client)\n}\n\nfn create_vault(env: \u0026Env) -\u003e (Address, CalloraVaultClient\u003c'_\u003e) {\n    let address = env.register(CalloraVault, ());\n    let client = CalloraVaultClient::new(env, \u0026address);\n    (address, client)\n}\n\nfn fund_vault(\n    usdc_admin_client: \u0026token::StellarAssetClient,\n    vault_address: \u0026Address,\n    amount: i128,\n) {\n    usdc_admin_client.mint(vault_address, \u0026amount);\n}\n\n#[test]\nfn vault_full_lifecycle() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    let meta = client.init(\u0026owner, \u0026usdc, \u0026Some(500), \u0026Some(10), \u0026None, \u0026None);\n    assert_eq!(meta.balance, 500);\n    assert_eq!(meta.owner, owner);\n    assert_eq!(client.balance(), 500);\n    assert_eq!(client.get_admin(), owner);\n\n    let depositor = Address::generate(\u0026env);\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    let after_deposit = client.deposit(\u0026depositor, \u0026200);\n    assert_eq!(after_deposit, 700);\n    assert_eq!(client.balance(), 700);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: Some(Symbol::new(\u0026env, \"r1\")),\n        },\n        DeductItem {\n            amount: 50,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 25,\n            request_id: Some(Symbol::new(\u0026env, \"r3\")),\n        },\n    ];\n    let after_batch = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(after_batch, 525);\n    assert_eq!(client.balance(), 525);\n\n    let after_deduct = client.deduct(\u0026caller, \u002625, \u0026Some(Symbol::new(\u0026env, \"r4\")));\n    assert_eq!(after_deduct, 500);\n\n    client.set_admin(\u0026owner, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    let after_withdraw = client.withdraw_to(\u0026recipient, \u0026100);\n    assert_eq!(after_withdraw, 400);\n    assert_eq!(client.balance(), 400);\n\n    let after_withdraw2 = client.withdraw(\u002650);\n    assert_eq!(after_withdraw2, 350);\n    assert_eq!(client.balance(), 350);\n\n    let final_meta = client.get_meta();\n    assert_eq!(final_meta.balance, 350);\n    assert_eq!(final_meta.owner, owner);\n    assert_eq!(final_meta.min_deposit, 10);\n}\n\n#[test]\nfn init_with_balance_emits_event() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n\n    let events = env.as_contract(\u0026contract_id, || {\n        CalloraVault::init(\n            env.clone(),\n            owner.clone(),\n            usdc_token.clone(),\n            Some(1000),\n            None,\n            None,\n            None,\n        );\n        env.events().all()\n    });\n\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    assert_eq!(client.balance(), 1000);\n\n    let last_event = events.last().expect(\"expected at least one event\");\n    assert_eq!(last_event.0, contract_id);\n\n    let topics = \u0026last_event.1;\n    assert_eq!(topics.len(), 2);\n    let topic0: Symbol = topics.get(0).unwrap().into_val(\u0026env);\n    let topic1: Address = topics.get(1).unwrap().into_val(\u0026env);\n    assert_eq!(topic0, Symbol::new(\u0026env, \"init\"));\n    assert_eq!(topic1, owner);\n\n    let data: i128 = last_event.2.into_val(\u0026env);\n    assert_eq!(data, 1000);\n}\n\n#[test]\nfn init_defaults_balance_to_zero() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\nfn get_meta_returns_owner_and_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n    let meta = client.get_meta();\n\n    assert_eq!(meta.owner, owner);\n    assert_eq!(meta.balance, 500);\n}\n\n#[test]\nfn get_meta_before_init_fails() {\n    let env = Env::default();\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n\n    let result = client.try_get_meta();\n    assert!(\n        result.is_err(),\n        \"expected error when vault is uninitialised\"\n    );\n}\n\n#[test]\nfn deposit_and_balance_match() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    let returned = client.deposit(\u0026depositor, \u0026200);\n\n    assert_eq!(\n        returned, 300,\n        \"deposit should return the new running balance\"\n    );\n    assert_eq!(client.balance(), 300);\n}\n\n#[test]\nfn deduct_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    client.deposit(\u0026depositor, \u0026200);\n    assert_eq!(client.balance(), 300);\n\n    let returned = client.deduct(\u0026caller, \u002650, \u0026None);\n    assert_eq!(returned, 250, \"deduct should return the remaining balance\");\n    assert_eq!(client.balance(), 250);\n}\n\n#[test]\nfn deduct_with_request_id() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let request_id = Symbol::new(\u0026env, \"req123\");\n    let remaining = client.deduct(\u0026caller, \u0026100, \u0026Some(request_id));\n    assert_eq!(remaining, 900);\n}\n\n#[test]\nfn deduct_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 10);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(10), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_deduct(\u0026caller, \u0026100, \u0026None);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn deduct_exact_balance_succeeds() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 75);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(75), \u0026None, \u0026None, \u0026None);\n    let remaining = client.deduct(\u0026caller, \u002675, \u0026None);\n\n    assert_eq!(remaining, 0);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\nfn deduct_event_contains_request_id() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let request_id = Symbol::new(\u0026env, \"api_call_42\");\n    client.deduct(\u0026caller, \u0026150, \u0026Some(request_id.clone()));\n\n    let events = env.events().all();\n    let ev = events.last().expect(\"expected deduct event\");\n\n    let topic0: Symbol = ev.1.get(0).unwrap().into_val(\u0026env);\n    let topic1: Address = ev.1.get(1).unwrap().into_val(\u0026env);\n    let topic2: Symbol = ev.1.get(2).unwrap().into_val(\u0026env);\n\n    assert_eq!(topic0, Symbol::new(\u0026env, \"deduct\"));\n    assert_eq!(topic1, caller);\n    assert_eq!(topic2, request_id);\n\n    let (emitted_amount, remaining): (i128, i128) = ev.2.into_val(\u0026env);\n    assert_eq!(emitted_amount, 150);\n    assert_eq!(remaining, 350);\n}\n\n#[test]\nfn deduct_event_no_request_id_uses_empty_symbol() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 300);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(300), \u0026None, \u0026None, \u0026None);\n    client.deduct(\u0026caller, \u0026100, \u0026None);\n\n    let events = env.events().all();\n    let ev = events.last().expect(\"expected deduct event\");\n\n    let topic0: Symbol = ev.1.get(0).unwrap().into_val(\u0026env);\n    let topic2: Symbol = ev.1.get(2).unwrap().into_val(\u0026env);\n\n    assert_eq!(topic0, Symbol::new(\u0026env, \"deduct\"));\n    assert_eq!(topic2, Symbol::new(\u0026env, \"\"));\n}\n\n#[test]\nfn batch_deduct_events_contain_request_ids() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let rid_a = Symbol::new(\u0026env, \"batch_a\");\n    let rid_b = Symbol::new(\u0026env, \"batch_b\");\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 200,\n            request_id: Some(rid_a.clone()),\n        },\n        DeductItem {\n            amount: 300,\n            request_id: Some(rid_b.clone()),\n        },\n    ];\n    client.batch_deduct(\u0026caller, \u0026items);\n\n    let all_events = env.events().all();\n    assert_eq!(all_events.len(), 2);\n\n    let ev_a = all_events.get(0).unwrap();\n    let ev_b = all_events.get(1).unwrap();\n\n    let req_a: Symbol = ev_a.1.get(2).unwrap().into_val(\u0026env);\n    let req_b: Symbol = ev_b.1.get(2).unwrap().into_val(\u0026env);\n    assert_eq!(req_a, rid_a);\n    assert_eq!(req_b, rid_b);\n\n    let (amt_a, _): (i128, i128) = ev_a.2.into_val(\u0026env);\n    let (amt_b, _): (i128, i128) = ev_b.2.into_val(\u0026env);\n    assert_eq!(amt_a, 200);\n    assert_eq!(amt_b, 300);\n}\n\n#[test]\nfn get_admin_returns_correct_address() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let admin = client.get_admin();\n    assert_eq!(admin, owner);\n}\n\n#[test]\nfn set_admin_updates_admin() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    client.set_admin(\u0026owner, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n}\n\n#[test]\nfn set_admin_unauthorized_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let intruder = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_set_admin(\u0026intruder, \u0026new_admin);\n    assert!(\n        result.is_err(),\n        \"expected error when non-admin tries to set admin\"\n    );\n}\n\n#[test]\nfn distribute_transfers_usdc_to_developer() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, usdc_client, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    client.distribute(\u0026admin, \u0026developer, \u0026300);\n\n    assert_eq!(usdc_client.balance(\u0026developer), 300);\n    assert_eq!(usdc_client.balance(\u0026vault_address), 700);\n}\n\n#[test]\nfn distribute_unauthorized_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let intruder = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026intruder, \u0026developer, \u0026300);\n    assert!(\n        result.is_err(),\n        \"expected error when non-admin tries to distribute\"\n    );\n}\n\n#[test]\nfn distribute_insufficient_usdc_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 100);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026admin, \u0026developer, \u0026500);\n    assert!(\n        result.is_err(),\n        \"expected error for insufficient USDC balance\"\n    );\n}\n\n#[test]\nfn distribute_zero_amount_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026admin, \u0026developer, \u00260);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn batch_deduct_multiple_items() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: Some(Symbol::new(\u0026env, \"req1\"))\n        },\n        DeductItem {\n            amount: 200,\n            request_id: None\n        },\n        DeductItem {\n            amount: 50,\n            request_id: Some(Symbol::new(\u0026env, \"req2\"))\n        }\n    ];\n\n    let remaining = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(remaining, 650);\n    assert_eq!(client.balance(), 650);\n}\n\n#[test]\nfn batch_deduct_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 50,\n            request_id: None\n        },\n        DeductItem {\n            amount: 80,\n            request_id: None\n        }\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for batch overdraw\");\n    assert_eq!(client.balance(), 100);\n}\n\n#[test]\nfn batch_deduct_empty_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items: soroban_sdk::Vec\u003cDeductItem\u003e = soroban_sdk::vec![\u0026env];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for empty batch\");\n}\n\n#[test]\nfn batch_deduct_zero_amount_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 0,\n            request_id: None\n        }\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn withdraw_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let remaining = client.withdraw(\u0026200);\n    assert_eq!(remaining, 300);\n    assert_eq!(client.balance(), 300);\n}\n\n#[test]\nfn withdraw_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw(\u0026500);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn withdraw_zero_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw(\u00260);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn withdraw_to_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let remaining = client.withdraw_to(\u0026recipient, \u0026150);\n    assert_eq!(remaining, 350);\n    assert_eq!(client.balance(), 350);\n}\n\n#[test]\nfn withdraw_to_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw_to(\u0026recipient, \u0026500);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn deposit_below_minimum_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026Some(50), \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 30);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u002630, \u00261000);\n    let result = client.try_deposit(\u0026depositor, \u002630);\n    assert!(result.is_err(), \"expected error for deposit below minimum\");\n}\n\n#[test]\nfn deposit_at_minimum_succeeds() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026Some(50), \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 50);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u002650, \u00261000);\n    let new_balance = client.deposit(\u0026depositor, \u002650);\n    assert_eq!(new_balance, 150);\n}\n\n#[test]\nfn double_init_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026Some(200), \u0026None, \u0026None, \u0026None);\n    assert!(result.is_err(), \"expected error for double init\");\n}\n\n#[test]\nfn init_insufficient_usdc_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 50);\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    assert!(\n        result.is_err(),\n        \"expected error when initial_balance exceeds contract USDC\"\n    );\n}\n\n#[test]\nfn init_with_zero_max_deduct_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026Some(0));\n    assert!(result.is_err(), \"expected error for max_deduct \u003c= 0\");\n}\n\n#[test]\nfn init_with_revenue_pool_and_get_revenue_pool() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let revenue_pool = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\n        \u0026owner,\n        \u0026usdc_token,\n        \u0026None,\n        \u0026None,\n        \u0026Some(revenue_pool.clone()),\n        \u0026None,\n    );\n\n    let retrieved_pool = client.get_revenue_pool();\n    assert_eq!(retrieved_pool, Some(revenue_pool));\n}\n\n#[test]\nfn get_revenue_pool_returns_none_when_not_set() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026None);\n\n    let retrieved_pool = client.get_revenue_pool();\n    assert_eq!(retrieved_pool, None);\n}\n\n#[test]\nfn get_max_deduct_returns_configured_value() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026Some(5000));\n\n    let max_deduct = client.get_max_deduct();\n    assert_eq!(max_deduct, 5000);\n}\n\n/// Fuzz test: random deposit/deduct sequence asserting balance \u003e= 0 and matches expected.\n#[test]\nfn fuzz_deposit_and_deduct() {\n    use rand::Rng;\n\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    let initial_balance: i128 = 1_000;\n    fund_vault(\u0026usdc_admin, \u0026vault_address, initial_balance);\n    usdc_admin.mint(\u0026owner, \u0026250_000);\n    usdc_client.approve(\u0026owner, \u0026vault_address, \u0026250_000, \u002610_000);\n    vault.init(\n        \u0026owner,\n        \u0026usdc_address,\n        \u0026Some(initial_balance),\n        \u0026None,\n        \u0026None,\n        \u0026None,\n    );\n    let mut expected = initial_balance;\n    let mut rng = rand::thread_rng();\n\n    for _ in 0..500 {\n        if rng.gen_bool(0.5) {\n            let amount = rng.gen_range(1..=500);\n            vault.deposit(\u0026owner, \u0026amount);\n            expected += amount;\n        } else if expected \u003e 0 {\n            let amount = rng.gen_range(1..=expected.min(500));\n            vault.deduct(\u0026owner, \u0026amount, \u0026None);\n            expected -= amount;\n        }\n\n        let balance = vault.balance();\n        assert!(balance \u003e= 0, \"balance went negative: {}\", balance);\n        assert_eq!(\n            balance, expected,\n            \"balance mismatch: got {}, expected {}\",\n            balance, expected\n        );\n    }\n\n    assert_eq!(vault.balance(), expected);\n}\n\n#[test]\nfn deduct_returns_new_balance() {\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    fund_vault(\u0026usdc_admin, \u0026vault_address, 100);\n    vault.init(\u0026owner, \u0026usdc_address, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    let new_balance = vault.deduct(\u0026owner, \u002630, \u0026None);\n    assert_eq!(new_balance, 70);\n    assert_eq!(vault.balance(), 70);\n}\n\n/// Fuzz test (seeded): deterministic deposit/deduct sequence asserting balance \u003e= 0 and matches expected.\n#[test]\nfn fuzz_deposit_and_deduct_seeded() {\n    use rand::rngs::StdRng;\n    use rand::{Rng, SeedableRng};\n\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    usdc_admin.mint(\u0026owner, \u00265_000_000);\n    usdc_client.approve(\u0026owner, \u0026vault_address, \u00265_000_000, \u002610_000);\n    vault.init(\u0026owner, \u0026usdc_address, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n    let mut expected: i128 = 0;\n    let mut rng = StdRng::seed_from_u64(42);\n\n    for _ in 0..500 {\n        let action: u8 = rng.gen_range(0..2);\n\n        if action == 0 {\n            let amount: i128 = rng.gen_range(1..=10_000);\n            vault.deposit(\u0026owner, \u0026amount);\n            expected += amount;\n        } else if expected \u003e 0 {\n            let amount: i128 = rng.gen_range(1..=expected);\n            vault.deduct(\u0026owner, \u0026amount, \u0026None);\n            expected -= amount;\n        }\n\n        assert!(expected \u003e= 0, \"balance went negative\");\n        assert_eq!(vault.balance(), expected, \"balance mismatch at iteration\");\n    }\n}\n\n#[test]\nfn batch_deduct_all_succeed() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 60);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(60), \u0026None, \u0026None, \u0026None);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n    let new_balance = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(new_balance, 0);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient balance\")]\nfn batch_deduct_all_revert() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 25);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(25), \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 25);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n    client.batch_deduct(\u0026caller, \u0026items);\n}\n\n#[test]\nfn batch_deduct_revert_preserves_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 25);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(25), \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 25);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n\n    let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {\n        client.batch_deduct(\u0026caller, \u0026items);\n    }));\n\n    assert!(result.is_err());\n    assert_eq!(client.balance(), 25);\n}\n\n#[test]\nfn owner_unchanged_after_deposit_and_deduct() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    usdc_admin.mint(\u0026owner, \u002650);\n    usdc_client.approve(\u0026owner, \u0026contract_id, \u002650, \u002610_000);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    client.deposit(\u0026owner, \u002650);\n    client.deduct(\u0026owner, \u002630, \u0026None);\n\n    assert_eq!(client.get_meta().owner, owner);\n}\n\n#[test]\nfn batch_deduct_exceeds_max_deduct_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026Some(50));\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: None,\n        },\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(\n        result.is_err(),\n        \"expected error for amount exceeding max_deduct\"\n    );\n}\n","traces":[{"line":7,"address":[11180719,11180256,11180725],"length":1,"stats":{"Line":8}},{"line":11,"address":[],"length":0,"stats":{"Line":2}},{"line":12,"address":[],"length":0,"stats":{"Line":13}},{"line":13,"address":[],"length":0,"stats":{"Line":2}},{"line":14,"address":[],"length":0,"stats":{"Line":5}},{"line":15,"address":[],"length":0,"stats":{"Line":8}},{"line":18,"address":[11180943,11180752,11180937],"length":1,"stats":{"Line":1}},{"line":19,"address":[11180791],"length":1,"stats":{"Line":1}},{"line":20,"address":[11180811],"length":1,"stats":{"Line":1}},{"line":21,"address":[11180856],"length":1,"stats":{"Line":1}},{"line":24,"address":[11180208],"length":1,"stats":{"Line":7}},{"line":29,"address":[11180231],"length":1,"stats":{"Line":8}}],"covered":12,"coverable":12},{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","hidden","contracts","revenue_pool","src","lib.rs"],"content":"#![no_std]\n\nuse soroban_sdk::{contract, contractimpl, token, Address, Env, Symbol, Vec};\n\n/// Revenue settlement contract: receives USDC from vault deducts and distributes to developers.\n///\n/// Flow: vault deduct → vault transfers USDC to this contract → admin calls distribute(to, amount).\nconst ADMIN_KEY: \u0026str = \"admin\";\nconst USDC_KEY: \u0026str = \"usdc\";\n\n#[contract]\npub struct RevenuePool;\n\n#[contractimpl]\nimpl RevenuePool {\n    /// Initialize the revenue pool with an admin and the USDC token address.\n    ///\n    /// # Arguments\n    /// * `admin` – Address that may call `distribute`. Typically backend or multisig.\n    /// * `usdc_token` – Stellar USDC (or wrapped USDC) token contract address.\n    pub fn init(env: Env, admin: Address, usdc_token: Address) {\n        admin.require_auth();\n        if env.storage().instance().has(\u0026Symbol::new(\u0026env, ADMIN_KEY)) {\n            panic!(\"revenue pool already initialized\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026admin);\n        inst.set(\u0026Symbol::new(\u0026env, USDC_KEY), \u0026usdc_token);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"init\"), admin), usdc_token);\n    }\n\n    /// Return the current admin address.\n    pub fn get_admin(env: Env) -\u003e Address {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, ADMIN_KEY))\n            .unwrap_or_else(|| panic!(\"revenue pool not initialized\"))\n    }\n\n    /// Replace the current admin. Only the existing admin may call this.\n    pub fn set_admin(env: Env, caller: Address, new_admin: Address) {\n        caller.require_auth();\n        let current = Self::get_admin(env.clone());\n        if caller != current {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026new_admin);\n    }\n\n    /// Placeholder: record that payment was received (e.g. from vault).\n    /// In practice, USDC is received when the vault (or any address) transfers tokens\n    /// to this contract's address; no separate \"receive\" call is required.\n    ///\n    /// This function can be used to emit an event for indexers when the backend\n    /// wants to log that a payment was credited from the vault.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be admin (or could be extended to allow vault to call).\n    /// * `amount` – Amount received (for event logging).\n    /// * `from_vault` – Optional; true if the source was the vault.\n    pub fn receive_payment(env: Env, caller: Address, amount: i128, from_vault: bool) {\n        caller.require_auth();\n        let _admin = Self::get_admin(env.clone());\n        env.events().publish(\n            (Symbol::new(\u0026env, \"receive_payment\"), caller),\n            (amount, from_vault),\n        );\n    }\n\n    /// Distribute USDC from this contract to a developer wallet.\n    ///\n    /// Only the admin may call. Transfers USDC from this contract to `to`.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be the current admin.\n    /// * `to` – Developer address to receive USDC.\n    /// * `amount` – Amount in token base units (e.g. USDC stroops).\n    pub fn distribute(env: Env, caller: Address, to: Address, amount: i128) {\n        caller.require_auth();\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        if amount \u003c= 0 {\n            panic!(\"amount must be positive\");\n        }\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"revenue pool not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        let contract_address = env.current_contract_address();\n        if usdc.balance(\u0026contract_address) \u003c amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        usdc.transfer(\u0026contract_address, \u0026to, \u0026amount);\n        env.events()\n            .publish((Symbol::new(\u0026env, \"distribute\"), to), amount);\n    }\n\n    /// Distribute USDC from this contract to multiple developer wallets in one transaction.\n    ///\n    /// Only the admin may call. Iterates through the vector of payments and atomically\n    /// transfers USDC to each developer. Fails if the total amount exceeds balance\n    /// or if any individual amount is not positive.\n    ///\n    /// # Arguments\n    /// * `caller` - Must be the current admin.\n    /// * `payments` - A vector of (Address, amount) tuples.\n    pub fn batch_distribute(env: Env, caller: Address, payments: Vec\u003c(Address, i128)\u003e) {\n        caller.require_auth();\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n\n        let mut total_amount: i128 = 0;\n        for payment in payments.iter() {\n            let (_, amount) = payment;\n            if amount \u003c= 0 {\n                panic!(\"amount must be positive\");\n            }\n            total_amount += amount;\n        }\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"revenue pool not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        let contract_address = env.current_contract_address();\n        if usdc.balance(\u0026contract_address) \u003c total_amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        for payment in payments.iter() {\n            let (to, amount) = payment;\n            usdc.transfer(\u0026contract_address, \u0026to, \u0026amount);\n            env.events()\n                .publish((Symbol::new(\u0026env, \"batch_distribute\"), to), amount);\n        }\n    }\n\n    /// Return this contract's USDC balance (for testing and dashboards).\n    pub fn balance(env: Env) -\u003e i128 {\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .unwrap_or_else(|| panic!(\"revenue pool not initialized\"));\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.balance(\u0026env.current_contract_address())\n    }\n}\n\n#[cfg(test)]\nmod test;\n","traces":[],"covered":0,"coverable":0},{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","hidden","contracts","revenue_pool","src","test.rs"],"content":"extern crate std;\n\nuse super::*;\nuse soroban_sdk::testutils::{Address as _, Events as _};\nuse soroban_sdk::token;\n\nfn create_usdc\u003c'a\u003e(\n    env: \u0026'a Env,\n    admin: \u0026Address,\n) -\u003e (Address, token::Client\u003c'a\u003e, token::StellarAssetClient\u003c'a\u003e) {\n    let contract_address = env.register_stellar_asset_contract_v2(admin.clone());\n    let address = contract_address.address();\n    let client = token::Client::new(env, \u0026address);\n    let admin_client = token::StellarAssetClient::new(env, \u0026address);\n    (address, client, admin_client)\n}\n\nfn create_pool(env: \u0026Env) -\u003e (Address, RevenuePoolClient\u003c'_\u003e) {\n    let address = env.register(RevenuePool, ());\n    let client = RevenuePoolClient::new(env, \u0026address);\n    (address, client)\n}\n\nfn fund_pool(usdc_admin_client: \u0026token::StellarAssetClient, pool_address: \u0026Address, amount: i128) {\n    usdc_admin_client.mint(pool_address, \u0026amount);\n}\n\n#[test]\nfn init_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_pool_addr, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    assert_eq!(client.get_admin(), admin);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\n#[should_panic(expected = \"revenue pool already initialized\")]\nfn init_double_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.init(\u0026admin, \u0026usdc);\n}\n\n#[test]\nfn distribute_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1_000);\n    client.distribute(\u0026admin, \u0026developer, \u0026400);\n\n    assert_eq!(usdc_client.balance(\u0026pool_addr), 600);\n    assert_eq!(usdc_client.balance(\u0026developer), 400);\n}\n\n#[test]\n#[should_panic(expected = \"amount must be positive\")]\nfn distribute_zero_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.distribute(\u0026admin, \u0026developer, \u00260);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient USDC balance\")]\nfn distribute_excess_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 100);\n    client.distribute(\u0026admin, \u0026developer, \u0026101);\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn distribute_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n    client.distribute(\u0026attacker, \u0026developer, \u0026100);\n}\n\n#[test]\nfn set_admin_transfers_control() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 300);\n    client.set_admin(\u0026admin, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    client.distribute(\u0026new_admin, \u0026developer, \u0026100);\n    assert_eq!(usdc_client.balance(\u0026developer), 100);\n}\n\n#[test]\nfn receive_payment_emits_event() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.receive_payment(\u0026admin, \u0026500, \u0026true);\n    let events = env.events().all();\n    assert!(!events.is_empty());\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn set_admin_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.set_admin(\u0026attacker, \u0026new_admin);\n}\n\n#[test]\n#[should_panic(expected = \"revenue pool not initialized\")]\nfn balance_before_init_panics() {\n    let env = Env::default();\n    let (_, client) = create_pool(\u0026env);\n    client.balance();\n}\n\n#[test]\nfn distribute_negative_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {\n        client.distribute(\u0026admin, \u0026developer, \u0026-1);\n    }));\n    assert!(result.is_err());\n}\n\n#[test]\nfn receive_payment_from_non_vault() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let (_, client) = create_pool(\u0026env);\n    let (usdc, _, _) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc);\n    client.receive_payment(\u0026admin, \u0026250, \u0026false);\n\n    let events = env.events().all();\n    assert!(!events.is_empty());\n}\n\n/// Full lifecycle test: init, get_admin, balance, distribute, receive_payment, set_admin.\n#[test]\nfn full_lifecycle() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    // Init\n    client.init(\u0026admin, \u0026usdc_address);\n    assert_eq!(client.get_admin(), admin);\n\n    // Fund and check balance\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1000);\n    assert_eq!(client.balance(), 1000);\n\n    // Distribute\n    client.distribute(\u0026admin, \u0026developer, \u0026400);\n    assert_eq!(usdc_client.balance(\u0026developer), 400);\n    assert_eq!(client.balance(), 600);\n\n    // Receive payment event\n    client.receive_payment(\u0026admin, \u0026100, \u0026true);\n\n    // Set admin\n    client.set_admin(\u0026admin, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    // New admin can distribute\n    client.distribute(\u0026new_admin, \u0026developer, \u0026100);\n    assert_eq!(usdc_client.balance(\u0026developer), 500);\n    assert_eq!(client.balance(), 500);\n}\n\n#[test]\nfn batch_distribute_success() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev1 = Address::generate(\u0026env);\n    let dev2 = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 1000);\n\n    let mut payments: Vec\u003c(Address, i128)\u003e = Vec::new(\u0026env);\n    payments.push_back((dev1.clone(), 300_i128));\n    payments.push_back((dev2.clone(), 200_i128));\n    client.batch_distribute(\u0026admin, \u0026payments);\n\n    assert_eq!(usdc_client.balance(\u0026dev1), 300);\n    assert_eq!(usdc_client.balance(\u0026dev2), 200);\n    assert_eq!(client.balance(), 500);\n}\n\n#[test]\n#[should_panic(expected = \"unauthorized: caller is not admin\")]\nfn batch_distribute_unauthorized_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let attacker = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n\n    let mut payments: Vec\u003c(Address, i128)\u003e = Vec::new(\u0026env);\n    payments.push_back((dev.clone(), 100_i128));\n    client.batch_distribute(\u0026attacker, \u0026payments);\n}\n\n#[test]\n#[should_panic(expected = \"amount must be positive\")]\nfn batch_distribute_zero_amount_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 500);\n\n    let mut payments: Vec\u003c(Address, i128)\u003e = Vec::new(\u0026env);\n    payments.push_back((dev.clone(), 0_i128));\n    client.batch_distribute(\u0026admin, \u0026payments);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient USDC balance\")]\nfn batch_distribute_insufficient_balance_panics() {\n    let env = Env::default();\n    env.mock_all_auths();\n    let admin = Address::generate(\u0026env);\n    let dev = Address::generate(\u0026env);\n    let (pool_addr, client) = create_pool(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026admin);\n\n    client.init(\u0026admin, \u0026usdc_address);\n    fund_pool(\u0026usdc_admin, \u0026pool_addr, 50);\n\n    let mut payments: Vec\u003c(Address, i128)\u003e = Vec::new(\u0026env);\n    payments.push_back((dev.clone(), 100_i128));\n    client.batch_distribute(\u0026admin, \u0026payments);\n}\n","traces":[{"line":11,"address":[],"length":0,"stats":{"Line":0}},{"line":12,"address":[],"length":0,"stats":{"Line":0}},{"line":13,"address":[],"length":0,"stats":{"Line":0}},{"line":14,"address":[],"length":0,"stats":{"Line":0}},{"line":15,"address":[],"length":0,"stats":{"Line":0}}],"covered":0,"coverable":5},{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","hidden","contracts","vault","src","lib.rs"],"content":"#![no_std]\n\nuse soroban_sdk::{contract, contractimpl, contracttype, token, Address, Env, Symbol, Vec};\n\n/// Single item for batch deduct: amount and optional request id for idempotency/tracking.\n#[contracttype]\n#[derive(Clone)]\npub struct DeductItem {\n    pub amount: i128,\n    pub request_id: Option\u003cSymbol\u003e,\n}\n\n#[contracttype]\n#[derive(Clone)]\npub struct VaultMeta {\n    pub owner: Address,\n    pub balance: i128,\n    /// Minimum amount required per deposit; deposits below this panic.\n    pub min_deposit: i128,\n}\n\nconst META_KEY: \u0026str = \"meta\";\nconst USDC_KEY: \u0026str = \"usdc\";\nconst ADMIN_KEY: \u0026str = \"admin\";\nconst REVENUE_POOL_KEY: \u0026str = \"revenue_pool\";\nconst MAX_DEDUCT_KEY: \u0026str = \"max_deduct\";\n\n/// Default maximum single deduct amount when not set at init (no cap).\npub const DEFAULT_MAX_DEDUCT: i128 = i128::MAX;\n\n#[contracttype]\n#[derive(Clone, Debug, PartialEq)]\npub struct DistributeEvent {\n    pub to: Address,\n    pub amount: i128,\n}\n\n#[contract]\npub struct CalloraVault;\n\n#[contractimpl]\nimpl CalloraVault {\n    /// Initialize vault for an owner with optional initial balance and minimum deposit.\n    /// If initial_balance \u003e 0, the contract must already hold at least that much USDC (e.g. deployer transferred in first).\n    /// Emits an \"init\" event with the owner address and initial balance.\n    ///\n    /// # Arguments\n    /// * `revenue_pool` – Optional address to receive USDC on each deduct (e.g. settlement contract). If None, USDC stays in vault.\n    /// * `max_deduct` – Optional cap per single deduct; if None, uses DEFAULT_MAX_DEDUCT (no cap).\n    pub fn init(\n        env: Env,\n        owner: Address,\n        usdc_token: Address,\n        initial_balance: Option\u003ci128\u003e,\n        min_deposit: Option\u003ci128\u003e,\n        revenue_pool: Option\u003cAddress\u003e,\n        max_deduct: Option\u003ci128\u003e,\n    ) -\u003e VaultMeta {\n        owner.require_auth();\n        if env.storage().instance().has(\u0026Symbol::new(\u0026env, META_KEY)) {\n            panic!(\"vault already initialized\");\n        }\n        let balance = initial_balance.unwrap_or(0);\n        if balance \u003e 0 {\n            let usdc = token::Client::new(\u0026env, \u0026usdc_token);\n            let contract_balance = usdc.balance(\u0026env.current_contract_address());\n            if contract_balance \u003c balance {\n                panic!(\"insufficient USDC in contract for initial_balance\");\n            }\n        }\n        let min_deposit_val = min_deposit.unwrap_or(0);\n        let max_deduct_val = max_deduct.unwrap_or(DEFAULT_MAX_DEDUCT);\n        if max_deduct_val \u003c= 0 {\n            panic!(\"max_deduct must be positive\");\n        }\n        let meta = VaultMeta {\n            owner: owner.clone(),\n            balance,\n            min_deposit: min_deposit_val,\n        };\n        // Persist metadata under both the literal key and the constant for safety.\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n        inst.set(\u0026Symbol::new(\u0026env, META_KEY), \u0026meta);\n        inst.set(\u0026Symbol::new(\u0026env, USDC_KEY), \u0026usdc_token);\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026owner);\n        if let Some(pool) = revenue_pool {\n            inst.set(\u0026Symbol::new(\u0026env, REVENUE_POOL_KEY), \u0026pool);\n        }\n        inst.set(\u0026Symbol::new(\u0026env, MAX_DEDUCT_KEY), \u0026max_deduct_val);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"init\"), owner), balance);\n\n        meta\n    }\n\n    /// Return the current admin address.\n    pub fn get_admin(env: Env) -\u003e Address {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, ADMIN_KEY))\n            .unwrap_or_else(|| panic!(\"vault not initialized\"))\n    }\n\n    /// Replace the current admin. Only the existing admin may call this.\n    pub fn set_admin(env: Env, caller: Address, new_admin: Address) {\n        caller.require_auth();\n        let current_admin = Self::get_admin(env.clone());\n        if caller != current_admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, ADMIN_KEY), \u0026new_admin);\n    }\n\n    /// Return the maximum allowed amount for a single deduct (configurable at init).\n    pub fn get_max_deduct(env: Env) -\u003e i128 {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, MAX_DEDUCT_KEY))\n            .unwrap_or_else(|| panic!(\"vault not initialized\"))\n    }\n\n    /// Return the revenue pool address if set (receives USDC on deduct).\n    pub fn get_revenue_pool(env: Env) -\u003e Option\u003cAddress\u003e {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, REVENUE_POOL_KEY))\n            .unwrap_or(None)\n    }\n\n    /// Distribute accumulated USDC to a single developer address.\n    ///\n    /// # Access control\n    /// Only the admin (backend / multisig) may call this.\n    ///\n    /// # Arguments\n    /// * `caller` – Must be the current admin address.\n    /// * `to`     – Developer wallet to receive the USDC.\n    /// * `amount` – Amount in USDC micro-units (must be \u003e 0 and ≤ vault balance).\n    ///\n    /// # Panics\n    /// * `\"unauthorized: caller is not admin\"` – caller is not the admin.\n    /// * `\"amount must be positive\"`           – amount is zero or negative.\n    /// * `\"insufficient USDC balance\"`         – vault holds less than amount.\n    ///\n    /// # Events\n    /// Emits topic `(\"distribute\", to)` with data `amount` on success.\n    pub fn distribute(env: Env, caller: Address, to: Address, amount: i128) {\n        // 1. Require on-chain signature from caller.\n        caller.require_auth();\n\n        // 2. Only the registered admin may distribute.\n        let admin = Self::get_admin(env.clone());\n        if caller != admin {\n            panic!(\"unauthorized: caller is not admin\");\n        }\n\n        // 3. Amount must be positive.\n        if amount \u003c= 0 {\n            panic!(\"amount must be positive\");\n        }\n\n        // 4. Load the USDC token address.\n        let usdc_opt: Option\u003cAddress\u003e = env.storage().instance().get(\u0026Symbol::new(\u0026env, USDC_KEY));\n        let usdc_address: Address = usdc_opt.unwrap_or_else(|| panic!(\"vault not initialized\"));\n\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n\n        // 5. Check vault has enough USDC.\n        let vault_balance = usdc.balance(\u0026env.current_contract_address());\n        if vault_balance \u003c amount {\n            panic!(\"insufficient USDC balance\");\n        }\n\n        // 6. Transfer USDC from vault to developer.\n        usdc.transfer(\u0026env.current_contract_address(), \u0026to, \u0026amount);\n\n        // 7. Emit distribute event.\n        env.events()\n            .publish((Symbol::new(\u0026env, \"distribute\"), to), amount);\n    }\n\n    /// Get vault metadata (owner and balance).\n    pub fn get_meta(env: Env) -\u003e VaultMeta {\n        env.storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, META_KEY))\n            .unwrap_or_else(|| panic!(\"vault not initialized\"))\n    }\n\n    /// Deposit: user transfers USDC to the contract; contract increases internal balance.\n    /// Caller must have authorized the transfer (token transfer_from). Supports multiple depositors.\n    /// Emits a \"deposit\" event with the depositor address and amount.\n    pub fn deposit(env: Env, from: Address, amount: i128) -\u003e i128 {\n        from.require_auth();\n\n        let mut meta = Self::get_meta(env.clone());\n        assert!(\n            amount \u003e= meta.min_deposit,\n            \"deposit below minimum: {} \u003c {}\",\n            amount,\n            meta.min_deposit\n        );\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer_from(\n            \u0026env.current_contract_address(),\n            \u0026from,\n            \u0026env.current_contract_address(),\n            \u0026amount,\n        );\n\n        meta.balance += amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events()\n            .publish((Symbol::new(\u0026env, \"deposit\"), from), amount);\n\n        meta.balance\n    }\n\n    /// Deduct balance for an API call. Callable by authorized caller (e.g. backend).\n    /// Amount must not exceed max single deduct (see init / get_max_deduct).\n    /// If revenue pool is set, USDC is transferred to it; otherwise it remains in the vault.\n    /// Emits a \"deduct\" event with caller, optional request_id, amount, and new balance.\n    pub fn deduct(env: Env, caller: Address, amount: i128, request_id: Option\u003cSymbol\u003e) -\u003e i128 {\n        caller.require_auth();\n        let max_deduct = Self::get_max_deduct(env.clone());\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(amount \u003c= max_deduct, \"deduct amount exceeds max_deduct\");\n\n        let mut meta = Self::get_meta(env.clone());\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        let topics = match \u0026request_id {\n            Some(rid) =\u003e (Symbol::new(\u0026env, \"deduct\"), caller.clone(), rid.clone()),\n            None =\u003e (\n                Symbol::new(\u0026env, \"deduct\"),\n                caller.clone(),\n                Symbol::new(\u0026env, \"\"),\n            ),\n        };\n        env.events().publish(topics, (amount, meta.balance));\n        meta.balance\n    }\n\n    /// Batch deduct: multiple (amount, optional request_id) in one transaction.\n    /// Each amount must not exceed max_deduct. Reverts entire batch if any check fails.\n    /// If revenue pool is set, total deducted USDC is transferred to it once.\n    /// Emits one \"deduct\" event per item.\n    pub fn batch_deduct(env: Env, caller: Address, items: Vec\u003cDeductItem\u003e) -\u003e i128 {\n        caller.require_auth();\n        let max_deduct = Self::get_max_deduct(env.clone());\n        let mut meta = Self::get_meta(env.clone());\n        let n = items.len();\n        assert!(n \u003e 0, \"batch_deduct requires at least one item\");\n\n        let mut running = meta.balance;\n        for item in items.iter() {\n            assert!(item.amount \u003e 0, \"amount must be positive\");\n            assert!(\n                item.amount \u003c= max_deduct,\n                \"deduct amount exceeds max_deduct\"\n            );\n            assert!(running \u003e= item.amount, \"insufficient balance\");\n            running -= item.amount;\n        }\n\n        let mut balance = meta.balance;\n        for item in items.iter() {\n            balance -= item.amount;\n            let topics = match \u0026item.request_id {\n                Some(rid) =\u003e (Symbol::new(\u0026env, \"deduct\"), caller.clone(), rid.clone()),\n                None =\u003e (\n                    Symbol::new(\u0026env, \"deduct\"),\n                    caller.clone(),\n                    Symbol::new(\u0026env, \"\"),\n                ),\n            };\n            env.events().publish(topics, (item.amount, balance));\n        }\n\n        meta.balance = balance;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n        meta.balance\n    }\n\n    /// Withdraw from vault. Callable only by the vault owner; reduces balance and transfers USDC to owner.\n    pub fn withdraw(env: Env, amount: i128) -\u003e i128 {\n        let mut meta = Self::get_meta(env.clone());\n        meta.owner.require_auth();\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer(\u0026env.current_contract_address(), \u0026meta.owner, \u0026amount);\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events().publish(\n            (Symbol::new(\u0026env, \"withdraw\"), meta.owner.clone()),\n            (amount, meta.balance),\n        );\n        meta.balance\n    }\n\n    /// Withdraw from vault to a designated address. Owner-only; transfers USDC to `to`.\n    pub fn withdraw_to(env: Env, to: Address, amount: i128) -\u003e i128 {\n        let mut meta = Self::get_meta(env.clone());\n        meta.owner.require_auth();\n        assert!(amount \u003e 0, \"amount must be positive\");\n        assert!(meta.balance \u003e= amount, \"insufficient balance\");\n\n        let usdc_address: Address = env\n            .storage()\n            .instance()\n            .get(\u0026Symbol::new(\u0026env, USDC_KEY))\n            .expect(\"vault not initialized\");\n        let usdc = token::Client::new(\u0026env, \u0026usdc_address);\n        usdc.transfer(\u0026env.current_contract_address(), \u0026to, \u0026amount);\n\n        meta.balance -= amount;\n        let inst = env.storage().instance();\n        inst.set(\u0026Symbol::new(\u0026env, \"meta\"), \u0026meta);\n\n        env.events().publish(\n            (\n                Symbol::new(\u0026env, \"withdraw_to\"),\n                meta.owner.clone(),\n                to.clone(),\n            ),\n            (amount, meta.balance),\n        );\n        meta.balance\n    }\n\n    /// Return current balance.\n    pub fn balance(env: Env) -\u003e i128 {\n        Self::get_meta(env).balance\n    }\n}\n\n#[cfg(test)]\nmod test;\n","traces":[],"covered":0,"coverable":0},{"path":["/","home","jeffersonyouashi","Documents","DRIPS","Callora-Contracts","hidden","contracts","vault","src","test.rs"],"content":"extern crate std;\n\nuse super::*;\nuse soroban_sdk::testutils::{Address as _, Events as _};\nuse soroban_sdk::{token, IntoVal, Symbol};\n\nfn create_usdc\u003c'a\u003e(\n    env: \u0026'a Env,\n    admin: \u0026Address,\n) -\u003e (Address, token::Client\u003c'a\u003e, token::StellarAssetClient\u003c'a\u003e) {\n    let contract_address = env.register_stellar_asset_contract_v2(admin.clone());\n    let address = contract_address.address();\n    let client = token::Client::new(env, \u0026address);\n    let admin_client = token::StellarAssetClient::new(env, \u0026address);\n    (address, client, admin_client)\n}\n\nfn create_vault(env: \u0026Env) -\u003e (Address, CalloraVaultClient\u003c'_\u003e) {\n    let address = env.register(CalloraVault, ());\n    let client = CalloraVaultClient::new(env, \u0026address);\n    (address, client)\n}\n\nfn fund_vault(\n    usdc_admin_client: \u0026token::StellarAssetClient,\n    vault_address: \u0026Address,\n    amount: i128,\n) {\n    usdc_admin_client.mint(vault_address, \u0026amount);\n}\n\n#[test]\nfn vault_full_lifecycle() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    let meta = client.init(\u0026owner, \u0026usdc, \u0026Some(500), \u0026Some(10), \u0026None, \u0026None);\n    assert_eq!(meta.balance, 500);\n    assert_eq!(meta.owner, owner);\n    assert_eq!(client.balance(), 500);\n    assert_eq!(client.get_admin(), owner);\n\n    let depositor = Address::generate(\u0026env);\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    let after_deposit = client.deposit(\u0026depositor, \u0026200);\n    assert_eq!(after_deposit, 700);\n    assert_eq!(client.balance(), 700);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: Some(Symbol::new(\u0026env, \"r1\")),\n        },\n        DeductItem {\n            amount: 50,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 25,\n            request_id: Some(Symbol::new(\u0026env, \"r3\")),\n        },\n    ];\n    let after_batch = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(after_batch, 525);\n    assert_eq!(client.balance(), 525);\n\n    let after_deduct = client.deduct(\u0026caller, \u002625, \u0026Some(Symbol::new(\u0026env, \"r4\")));\n    assert_eq!(after_deduct, 500);\n\n    client.set_admin(\u0026owner, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n\n    let after_withdraw = client.withdraw_to(\u0026recipient, \u0026100);\n    assert_eq!(after_withdraw, 400);\n    assert_eq!(client.balance(), 400);\n\n    let after_withdraw2 = client.withdraw(\u002650);\n    assert_eq!(after_withdraw2, 350);\n    assert_eq!(client.balance(), 350);\n\n    let final_meta = client.get_meta();\n    assert_eq!(final_meta.balance, 350);\n    assert_eq!(final_meta.owner, owner);\n    assert_eq!(final_meta.min_deposit, 10);\n}\n\n#[test]\nfn init_with_balance_emits_event() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n\n    let events = env.as_contract(\u0026contract_id, || {\n        CalloraVault::init(\n            env.clone(),\n            owner.clone(),\n            usdc_token.clone(),\n            Some(1000),\n            None,\n            None,\n            None,\n        );\n        env.events().all()\n    });\n\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    assert_eq!(client.balance(), 1000);\n\n    let last_event = events.last().expect(\"expected at least one event\");\n    assert_eq!(last_event.0, contract_id);\n\n    let topics = \u0026last_event.1;\n    assert_eq!(topics.len(), 2);\n    let topic0: Symbol = topics.get(0).unwrap().into_val(\u0026env);\n    let topic1: Address = topics.get(1).unwrap().into_val(\u0026env);\n    assert_eq!(topic0, Symbol::new(\u0026env, \"init\"));\n    assert_eq!(topic1, owner);\n\n    let data: i128 = last_event.2.into_val(\u0026env);\n    assert_eq!(data, 1000);\n}\n\n#[test]\nfn init_defaults_balance_to_zero() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\nfn get_meta_returns_owner_and_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n    let meta = client.get_meta();\n\n    assert_eq!(meta.owner, owner);\n    assert_eq!(meta.balance, 500);\n}\n\n#[test]\nfn get_meta_before_init_fails() {\n    let env = Env::default();\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n\n    let result = client.try_get_meta();\n    assert!(\n        result.is_err(),\n        \"expected error when vault is uninitialised\"\n    );\n}\n\n#[test]\nfn deposit_and_balance_match() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    let returned = client.deposit(\u0026depositor, \u0026200);\n\n    assert_eq!(\n        returned, 300,\n        \"deposit should return the new running balance\"\n    );\n    assert_eq!(client.balance(), 300);\n}\n\n#[test]\nfn deduct_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 200);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u0026200, \u00261000);\n    client.deposit(\u0026depositor, \u0026200);\n    assert_eq!(client.balance(), 300);\n\n    let returned = client.deduct(\u0026caller, \u002650, \u0026None);\n    assert_eq!(returned, 250, \"deduct should return the remaining balance\");\n    assert_eq!(client.balance(), 250);\n}\n\n#[test]\nfn deduct_with_request_id() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let request_id = Symbol::new(\u0026env, \"req123\");\n    let remaining = client.deduct(\u0026caller, \u0026100, \u0026Some(request_id));\n    assert_eq!(remaining, 900);\n}\n\n#[test]\nfn deduct_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 10);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(10), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_deduct(\u0026caller, \u0026100, \u0026None);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn deduct_exact_balance_succeeds() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n    let caller = Address::generate(\u0026env);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 75);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(75), \u0026None, \u0026None, \u0026None);\n    let remaining = client.deduct(\u0026caller, \u002675, \u0026None);\n\n    assert_eq!(remaining, 0);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\nfn deduct_event_contains_request_id() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let request_id = Symbol::new(\u0026env, \"api_call_42\");\n    client.deduct(\u0026caller, \u0026150, \u0026Some(request_id.clone()));\n\n    let events = env.events().all();\n    let ev = events.last().expect(\"expected deduct event\");\n\n    let topic0: Symbol = ev.1.get(0).unwrap().into_val(\u0026env);\n    let topic1: Address = ev.1.get(1).unwrap().into_val(\u0026env);\n    let topic2: Symbol = ev.1.get(2).unwrap().into_val(\u0026env);\n\n    assert_eq!(topic0, Symbol::new(\u0026env, \"deduct\"));\n    assert_eq!(topic1, caller);\n    assert_eq!(topic2, request_id);\n\n    let (emitted_amount, remaining): (i128, i128) = ev.2.into_val(\u0026env);\n    assert_eq!(emitted_amount, 150);\n    assert_eq!(remaining, 350);\n}\n\n#[test]\nfn deduct_event_no_request_id_uses_empty_symbol() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 300);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(300), \u0026None, \u0026None, \u0026None);\n    client.deduct(\u0026caller, \u0026100, \u0026None);\n\n    let events = env.events().all();\n    let ev = events.last().expect(\"expected deduct event\");\n\n    let topic0: Symbol = ev.1.get(0).unwrap().into_val(\u0026env);\n    let topic2: Symbol = ev.1.get(2).unwrap().into_val(\u0026env);\n\n    assert_eq!(topic0, Symbol::new(\u0026env, \"deduct\"));\n    assert_eq!(topic2, Symbol::new(\u0026env, \"\"));\n}\n\n#[test]\nfn batch_deduct_events_contain_request_ids() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let rid_a = Symbol::new(\u0026env, \"batch_a\");\n    let rid_b = Symbol::new(\u0026env, \"batch_b\");\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 200,\n            request_id: Some(rid_a.clone()),\n        },\n        DeductItem {\n            amount: 300,\n            request_id: Some(rid_b.clone()),\n        },\n    ];\n    client.batch_deduct(\u0026caller, \u0026items);\n\n    let all_events = env.events().all();\n    assert_eq!(all_events.len(), 2);\n\n    let ev_a = all_events.get(0).unwrap();\n    let ev_b = all_events.get(1).unwrap();\n\n    let req_a: Symbol = ev_a.1.get(2).unwrap().into_val(\u0026env);\n    let req_b: Symbol = ev_b.1.get(2).unwrap().into_val(\u0026env);\n    assert_eq!(req_a, rid_a);\n    assert_eq!(req_b, rid_b);\n\n    let (amt_a, _): (i128, i128) = ev_a.2.into_val(\u0026env);\n    let (amt_b, _): (i128, i128) = ev_b.2.into_val(\u0026env);\n    assert_eq!(amt_a, 200);\n    assert_eq!(amt_b, 300);\n}\n\n#[test]\nfn get_admin_returns_correct_address() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let admin = client.get_admin();\n    assert_eq!(admin, owner);\n}\n\n#[test]\nfn set_admin_updates_admin() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    client.set_admin(\u0026owner, \u0026new_admin);\n    assert_eq!(client.get_admin(), new_admin);\n}\n\n#[test]\nfn set_admin_unauthorized_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let intruder = Address::generate(\u0026env);\n    let new_admin = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_set_admin(\u0026intruder, \u0026new_admin);\n    assert!(\n        result.is_err(),\n        \"expected error when non-admin tries to set admin\"\n    );\n}\n\n#[test]\nfn distribute_transfers_usdc_to_developer() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, usdc_client, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    client.distribute(\u0026admin, \u0026developer, \u0026300);\n\n    assert_eq!(usdc_client.balance(\u0026developer), 300);\n    assert_eq!(usdc_client.balance(\u0026vault_address), 700);\n}\n\n#[test]\nfn distribute_unauthorized_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let intruder = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026intruder, \u0026developer, \u0026300);\n    assert!(\n        result.is_err(),\n        \"expected error when non-admin tries to distribute\"\n    );\n}\n\n#[test]\nfn distribute_insufficient_usdc_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 100);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026admin, \u0026developer, \u0026500);\n    assert!(\n        result.is_err(),\n        \"expected error for insufficient USDC balance\"\n    );\n}\n\n#[test]\nfn distribute_zero_amount_fails() {\n    let env = Env::default();\n    let admin = Address::generate(\u0026env);\n    let developer = Address::generate(\u0026env);\n    let (vault_address, client) = create_vault(\u0026env);\n    let (usdc, _, usdc_admin_client) = create_usdc(\u0026env, \u0026admin);\n\n    env.mock_all_auths();\n\n    fund_vault(\u0026usdc_admin_client, \u0026vault_address, 1000);\n    client.init(\u0026admin, \u0026usdc, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_distribute(\u0026admin, \u0026developer, \u00260);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn batch_deduct_multiple_items() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: Some(Symbol::new(\u0026env, \"req1\"))\n        },\n        DeductItem {\n            amount: 200,\n            request_id: None\n        },\n        DeductItem {\n            amount: 50,\n            request_id: Some(Symbol::new(\u0026env, \"req2\"))\n        }\n    ];\n\n    let remaining = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(remaining, 650);\n    assert_eq!(client.balance(), 650);\n}\n\n#[test]\nfn batch_deduct_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 50,\n            request_id: None\n        },\n        DeductItem {\n            amount: 80,\n            request_id: None\n        }\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for batch overdraw\");\n    assert_eq!(client.balance(), 100);\n}\n\n#[test]\nfn batch_deduct_empty_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items: soroban_sdk::Vec\u003cDeductItem\u003e = soroban_sdk::vec![\u0026env];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for empty batch\");\n}\n\n#[test]\nfn batch_deduct_zero_amount_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 0,\n            request_id: None\n        }\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn withdraw_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let remaining = client.withdraw(\u0026200);\n    assert_eq!(remaining, 300);\n    assert_eq!(client.balance(), 300);\n}\n\n#[test]\nfn withdraw_insufficient_balance_fails() {\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw(\u0026500);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn withdraw_zero_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw(\u00260);\n    assert!(result.is_err(), \"expected error for zero amount\");\n}\n\n#[test]\nfn withdraw_to_reduces_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 500);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(500), \u0026None, \u0026None, \u0026None);\n\n    let remaining = client.withdraw_to(\u0026recipient, \u0026150);\n    assert_eq!(remaining, 350);\n    assert_eq!(client.balance(), 350);\n}\n\n#[test]\nfn withdraw_to_insufficient_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let recipient = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_withdraw_to(\u0026recipient, \u0026500);\n    assert!(result.is_err(), \"expected error for insufficient balance\");\n}\n\n#[test]\nfn deposit_below_minimum_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026Some(50), \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 30);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u002630, \u00261000);\n    let result = client.try_deposit(\u0026depositor, \u002630);\n    assert!(result.is_err(), \"expected error for deposit below minimum\");\n}\n\n#[test]\nfn deposit_at_minimum_succeeds() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let depositor = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026Some(50), \u0026None, \u0026None);\n\n    fund_vault(\u0026usdc_admin, \u0026depositor, 50);\n    let usdc_client = token::Client::new(\u0026env, \u0026usdc_token);\n    usdc_client.approve(\u0026depositor, \u0026contract_id, \u002650, \u00261000);\n    let new_balance = client.deposit(\u0026depositor, \u002650);\n    assert_eq!(new_balance, 150);\n}\n\n#[test]\nfn double_init_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026Some(200), \u0026None, \u0026None, \u0026None);\n    assert!(result.is_err(), \"expected error for double init\");\n}\n\n#[test]\nfn init_insufficient_usdc_balance_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 50);\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    assert!(\n        result.is_err(),\n        \"expected error when initial_balance exceeds contract USDC\"\n    );\n}\n\n#[test]\nfn init_with_zero_max_deduct_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n\n    let result = client.try_init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026Some(0));\n    assert!(result.is_err(), \"expected error for max_deduct \u003c= 0\");\n}\n\n#[test]\nfn init_with_revenue_pool_and_get_revenue_pool() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let revenue_pool = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\n        \u0026owner,\n        \u0026usdc_token,\n        \u0026None,\n        \u0026None,\n        \u0026Some(revenue_pool.clone()),\n        \u0026None,\n    );\n\n    let retrieved_pool = client.get_revenue_pool();\n    assert_eq!(retrieved_pool, Some(revenue_pool));\n}\n\n#[test]\nfn get_revenue_pool_returns_none_when_not_set() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026None);\n\n    let retrieved_pool = client.get_revenue_pool();\n    assert_eq!(retrieved_pool, None);\n}\n\n#[test]\nfn get_max_deduct_returns_configured_value() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, _) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    client.init(\u0026owner, \u0026usdc_token, \u0026None, \u0026None, \u0026None, \u0026Some(5000));\n\n    let max_deduct = client.get_max_deduct();\n    assert_eq!(max_deduct, 5000);\n}\n\n/// Fuzz test: random deposit/deduct sequence asserting balance \u003e= 0 and matches expected.\n/// Run with: cargo test --package callora-vault fuzz_deposit_and_deduct -- --nocapture\n#[test]\nfn fuzz_deposit_and_deduct() {\n    use rand::Rng;\n\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    let initial_balance: i128 = 1_000;\n    fund_vault(\u0026usdc_admin, \u0026vault_address, initial_balance);\n    // Pre-fund owner for deposits in the loop\n    usdc_admin.mint(\u0026owner, \u0026250_000);\n    usdc_client.approve(\u0026owner, \u0026vault_address, \u0026250_000, \u002610_000);\n    vault.init(\n        \u0026owner,\n        \u0026usdc_address,\n        \u0026Some(initial_balance),\n        \u0026None,\n        \u0026None,\n        \u0026None,\n    );\n    let mut expected = initial_balance;\n    let mut rng = rand::thread_rng();\n\n    for _ in 0..500 {\n        if rng.gen_bool(0.5) {\n            let amount = rng.gen_range(1..=500);\n            vault.deposit(\u0026owner, \u0026amount);\n            expected += amount;\n        } else if expected \u003e 0 {\n            let amount = rng.gen_range(1..=expected.min(500));\n            vault.deduct(\u0026owner, \u0026amount, \u0026None);\n            expected -= amount;\n        }\n\n        let balance = vault.balance();\n        assert!(balance \u003e= 0, \"balance went negative: {}\", balance);\n        assert_eq!(\n            balance, expected,\n            \"balance mismatch: got {}, expected {}\",\n            balance, expected\n        );\n    }\n\n    assert_eq!(vault.balance(), expected);\n}\n\n#[test]\nfn deduct_returns_new_balance() {\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    fund_vault(\u0026usdc_admin, \u0026vault_address, 100);\n    vault.init(\u0026owner, \u0026usdc_address, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    let new_balance = vault.deduct(\u0026owner, \u002630, \u0026None);\n    assert_eq!(new_balance, 70);\n    assert_eq!(vault.balance(), 70);\n}\n\n/// Fuzz test (seeded): deterministic deposit/deduct sequence asserting balance \u003e= 0 and matches expected.\n#[test]\nfn fuzz_deposit_and_deduct_seeded() {\n    use rand::rngs::StdRng;\n    use rand::{Rng, SeedableRng};\n\n    let env = Env::default();\n    env.mock_all_auths();\n\n    let owner = Address::generate(\u0026env);\n    let (vault_address, vault) = create_vault(\u0026env);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    // Pre-fund owner for deposits in the loop\n    usdc_admin.mint(\u0026owner, \u00265_000_000);\n    usdc_client.approve(\u0026owner, \u0026vault_address, \u00265_000_000, \u002610_000);\n    vault.init(\u0026owner, \u0026usdc_address, \u0026Some(0), \u0026None, \u0026None, \u0026None);\n    let mut expected: i128 = 0;\n    let mut rng = StdRng::seed_from_u64(42);\n\n    for _ in 0..500 {\n        let action: u8 = rng.gen_range(0..2);\n\n        if action == 0 {\n            let amount: i128 = rng.gen_range(1..=10_000);\n            vault.deposit(\u0026owner, \u0026amount);\n            expected += amount;\n        } else if expected \u003e 0 {\n            let amount: i128 = rng.gen_range(1..=expected);\n            vault.deduct(\u0026owner, \u0026amount, \u0026None);\n            expected -= amount;\n        }\n\n        assert!(expected \u003e= 0, \"balance went negative\");\n        assert_eq!(vault.balance(), expected, \"balance mismatch at iteration\");\n    }\n}\n\n#[test]\nfn batch_deduct_all_succeed() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 60);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(60), \u0026None, \u0026None, \u0026None);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n    let new_balance = client.batch_deduct(\u0026caller, \u0026items);\n    assert_eq!(new_balance, 0);\n    assert_eq!(client.balance(), 0);\n}\n\n#[test]\n#[should_panic(expected = \"insufficient balance\")]\nfn batch_deduct_all_revert() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 25);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(25), \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 25);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n    client.batch_deduct(\u0026caller, \u0026items);\n}\n\n#[test]\nfn batch_deduct_revert_preserves_balance() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 25);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(25), \u0026None, \u0026None, \u0026None);\n    assert_eq!(client.balance(), 25);\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 10,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 20,\n            request_id: None,\n        },\n        DeductItem {\n            amount: 30,\n            request_id: None,\n        },\n    ];\n    let caller = Address::generate(\u0026env);\n    env.mock_all_auths();\n\n    let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {\n        client.batch_deduct(\u0026caller, \u0026items);\n    }));\n\n    assert!(result.is_err());\n    assert_eq!(client.balance(), 25);\n}\n\n#[test]\nfn owner_unchanged_after_deposit_and_deduct() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_address, usdc_client, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 100);\n    // Fund owner for the deposit call\n    usdc_admin.mint(\u0026owner, \u002650);\n    usdc_client.approve(\u0026owner, \u0026contract_id, \u002650, \u002610_000);\n    client.init(\u0026owner, \u0026usdc_address, \u0026Some(100), \u0026None, \u0026None, \u0026None);\n    client.deposit(\u0026owner, \u002650);\n    client.deduct(\u0026owner, \u002630, \u0026None);\n\n    assert_eq!(client.get_meta().owner, owner);\n}\n\n#[test]\nfn batch_deduct_exceeds_max_deduct_fails() {\n    let env = Env::default();\n    let owner = Address::generate(\u0026env);\n    let caller = Address::generate(\u0026env);\n    let contract_id = env.register(CalloraVault {}, ());\n    let client = CalloraVaultClient::new(\u0026env, \u0026contract_id);\n    let (usdc_token, _, usdc_admin) = create_usdc(\u0026env, \u0026owner);\n\n    env.mock_all_auths();\n    fund_vault(\u0026usdc_admin, \u0026contract_id, 1000);\n    client.init(\u0026owner, \u0026usdc_token, \u0026Some(1000), \u0026None, \u0026None, \u0026Some(50));\n\n    let items = soroban_sdk::vec![\n        \u0026env,\n        DeductItem {\n            amount: 100,\n            request_id: None,\n        },\n    ];\n\n    let result = client.try_batch_deduct(\u0026caller, \u0026items);\n    assert!(\n        result.is_err(),\n        \"expected error for amount exceeding max_deduct\"\n    );\n}\n","traces":[{"line":11,"address":[],"length":0,"stats":{"Line":0}},{"line":12,"address":[],"length":0,"stats":{"Line":0}},{"line":13,"address":[],"length":0,"stats":{"Line":0}},{"line":14,"address":[],"length":0,"stats":{"Line":0}},{"line":15,"address":[],"length":0,"stats":{"Line":0}}],"covered":0,"coverable":5}]};
     </script>
diff --git a/scripts/coverage.sh b/scripts/coverage.sh
index a1328c4..4681a3f 100755
--- a/scripts/coverage.sh
+++ b/scripts/coverage.sh
@@ -4,90 +4,46 @@
 # Generate a test coverage report for the Callora Contracts workspace using
 # cargo-tarpaulin and enforce a minimum of 95 % line coverage.
 #
-# Usage
-# -----
-#   ./scripts/coverage.sh           # run from the workspace root
+# Usage:
+#   ./scripts/coverage.sh
 #
-# First-time setup
-# ----------------
-#   The script installs cargo-tarpaulin automatically if it is not found.
-#   You only need a working Rust / Cargo toolchain (stable).
+# Prerequisites:
+#   cargo install cargo-tarpaulin
 #
-# Output
-# ------
-#   coverage/tarpaulin-report.html  – interactive per-file report
-#   coverage/cobertura.xml          – Cobertura XML (consumed by CI)
-#   Stdout summary printed at end of run
+# The script reads tarpaulin.toml for configuration (fail-under, output format,
+# timeout, etc.).
 
 set -euo pipefail
 
-# ---------------------------------------------------------------------------
-# Configuration — keep in sync with tarpaulin.toml
-# ---------------------------------------------------------------------------
-MINIMUM_COVERAGE=95
-COVERAGE_DIR="coverage"
-TARPAULIN_VERSION="0.31"   # minimum version; any newer release also works
+# ── Colours ──────────────────────────────────────────────────────────────────
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+CYAN='\033[0;36m'
+NC='\033[0m' # No Colour
+
+# ── Pre-flight checks ───────────────────────────────────────────────────────
+if ! command -v cargo-tarpaulin &>/dev/null; then
+  echo -e "${RED}ERROR:${NC} cargo-tarpaulin is not installed."
+  echo "       Install it with:  cargo install cargo-tarpaulin"
+  exit 1
+fi
 
-# ---------------------------------------------------------------------------
-# Helpers
-# ---------------------------------------------------------------------------
-info()    { echo -e "  \033[1;34m[INFO]\033[0m  $*"; }
-success() { echo -e "  \033[1;32m[PASS]\033[0m  $*"; }
-error()   { echo -e "  \033[1;31m[FAIL]\033[0m  $*" >&2; }
+TARPAULIN_VERSION=$(cargo tarpaulin --version 2>&1 || true)
+echo -e "  ${CYAN}[INFO]${NC}  Using ${TARPAULIN_VERSION}"
+echo -e "  ${CYAN}[INFO]${NC}  Running tests with coverage instrumentation..."
 
-# ---------------------------------------------------------------------------
-# Make sure we run from the workspace root (directory containing Cargo.toml)
-# ---------------------------------------------------------------------------
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-cd "${SCRIPT_DIR}/.."
+# ── Run tarpaulin ────────────────────────────────────────────────────────────
+# All flags come from tarpaulin.toml at the workspace root.
+cargo tarpaulin
 
-if [[ ! -f "Cargo.toml" ]]; then
-    error "Could not locate workspace Cargo.toml. Run this script from the repo root."
-    exit 1
-fi
+STATUS=$?
 
-# ---------------------------------------------------------------------------
-# Install cargo-tarpaulin if missing
-# ---------------------------------------------------------------------------
-if ! cargo tarpaulin --version &>/dev/null 2>&1; then
-    info "cargo-tarpaulin not found — installing (this happens once)..."
-    cargo install cargo-tarpaulin --version "^${TARPAULIN_VERSION}" --locked
-    success "cargo-tarpaulin installed."
+if [ $STATUS -eq 0 ]; then
+  echo ""
+  echo -e "  ${GREEN}[OK]${NC}  Coverage threshold met."
 else
-    INSTALLED=$(cargo tarpaulin --version 2>&1 | head -1)
-    info "Using ${INSTALLED}"
+  echo ""
+  echo -e "  ${RED}[FAIL]${NC}  Coverage below threshold — see report above."
 fi
 
-# ---------------------------------------------------------------------------
-# Prepare output directory
-# ---------------------------------------------------------------------------
-mkdir -p "${COVERAGE_DIR}"
-
-# ---------------------------------------------------------------------------
-# Run coverage
-# tarpaulin.toml in the workspace root carries the full configuration;
-# flags below match it so the script can also be run without the config file.
-# ---------------------------------------------------------------------------
-info "Running tests with coverage instrumentation..."
-echo ""
-
-cargo tarpaulin \
-    --config tarpaulin.toml
-
-echo ""
-
-# ---------------------------------------------------------------------------
-# Friendly reminder of where to find the reports
-# ---------------------------------------------------------------------------
-success "Coverage run complete."
-echo ""
-echo "  Reports written to ./${COVERAGE_DIR}/"
-echo "    HTML  →  ./${COVERAGE_DIR}/tarpaulin-report.html"
-echo "    XML   →  ./${COVERAGE_DIR}/cobertura.xml"
-echo ""
-echo "  Open the HTML report in a browser:"
-echo "    xdg-open ./${COVERAGE_DIR}/tarpaulin-report.html  # Linux"
-echo "    open     ./${COVERAGE_DIR}/tarpaulin-report.html  # macOS"
-echo ""
-echo "  Minimum enforced: ${MINIMUM_COVERAGE}%"
-echo "  (non-zero exit from tarpaulin means coverage fell below the threshold)"
+exit $STATUS