diff --git a/assignments/1/saving-vault/.gitignore b/assignments/1/saving-vault/.gitignore
new file mode 100644
index 00000000..991a319e
--- /dev/null
+++ b/assignments/1/saving-vault/.gitignore
@@ -0,0 +1,20 @@
+# Node modules
+/node_modules
+
+# Compilation output
+/dist
+
+# pnpm deploy output
+/bundle
+
+# Hardhat Build Artifacts
+/artifacts
+
+# Hardhat compilation (v2) support directory
+/cache
+
+# Typechain output
+/types
+
+# Hardhat coverage reports
+/coverage
diff --git a/assignments/1/saving-vault/README.md b/assignments/1/saving-vault/README.md
new file mode 100644
index 00000000..4743e82a
--- /dev/null
+++ b/assignments/1/saving-vault/README.md
@@ -0,0 +1,57 @@
+# Sample Hardhat 3 Beta Project (`node:test` and `viem`)
+
+This project showcases a Hardhat 3 Beta project using the native Node.js test runner (`node:test`) and the `viem` library for Ethereum interactions.
+
+To learn more about the Hardhat 3 Beta, please visit the [Getting Started guide](https://hardhat.org/docs/getting-started#getting-started-with-hardhat-3). To share your feedback, join our [Hardhat 3 Beta](https://hardhat.org/hardhat3-beta-telegram-group) Telegram group or [open an issue](https://github.com/NomicFoundation/hardhat/issues/new) in our GitHub issue tracker.
+
+## Project Overview
+
+This example project includes:
+
+- A simple Hardhat configuration file.
+- Foundry-compatible Solidity unit tests.
+- TypeScript integration tests using [`node:test`](nodejs.org/api/test.html), the new Node.js native test runner, and [`viem`](https://viem.sh/).
+- Examples demonstrating how to connect to different types of networks, including locally simulating OP mainnet.
+
+## Usage
+
+### Running Tests
+
+To run all the tests in the project, execute the following command:
+
+```shell
+npx hardhat test
+```
+
+You can also selectively run the Solidity or `node:test` tests:
+
+```shell
+npx hardhat test solidity
+npx hardhat test nodejs
+```
+
+### Make a deployment to Sepolia
+
+This project includes an example Ignition module to deploy the contract. You can deploy this module to a locally simulated chain or to Sepolia.
+
+To run the deployment to a local chain:
+
+```shell
+npx hardhat ignition deploy ignition/modules/Counter.ts
+```
+
+To run the deployment to Sepolia, you need an account with funds to send the transaction. The provided Hardhat configuration includes a Configuration Variable called `SEPOLIA_PRIVATE_KEY`, which you can use to set the private key of the account you want to use.
+
+You can set the `SEPOLIA_PRIVATE_KEY` variable using the `hardhat-keystore` plugin or by setting it as an environment variable.
+
+To set the `SEPOLIA_PRIVATE_KEY` config variable using `hardhat-keystore`:
+
+```shell
+npx hardhat keystore set SEPOLIA_PRIVATE_KEY
+```
+
+After setting the variable, you can run the deployment with the Sepolia network:
+
+```shell
+npx hardhat ignition deploy --network sepolia ignition/modules/Counter.ts
+```
diff --git a/assignments/1/saving-vault/contracts/Counter.sol b/assignments/1/saving-vault/contracts/Counter.sol
new file mode 100644
index 00000000..8d00cb7c
--- /dev/null
+++ b/assignments/1/saving-vault/contracts/Counter.sol
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+contract Counter {
+  uint public x;
+
+  event Increment(uint by);
+
+  function inc() public {
+    x++;
+    emit Increment(1);
+  }
+
+  function incBy(uint by) public {
+    require(by > 0, "incBy: increment should be positive");
+    x += by;
+    emit Increment(by);
+  }
+}
diff --git a/assignments/1/saving-vault/contracts/Counter.t.sol b/assignments/1/saving-vault/contracts/Counter.t.sol
new file mode 100644
index 00000000..582fc074
--- /dev/null
+++ b/assignments/1/saving-vault/contracts/Counter.t.sol
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+import {Counter} from "./Counter.sol";
+import {Test} from "forge-std/Test.sol";
+
+contract CounterTest is Test {
+  Counter counter;
+
+  function setUp() public {
+    counter = new Counter();
+  }
+
+  function test_InitialValue() public view {
+    require(counter.x() == 0, "Initial value should be 0");
+  }
+
+  function testFuzz_Inc(uint8 x) public {
+    for (uint8 i = 0; i < x; i++) {
+      counter.inc();
+    }
+    require(counter.x() == x, "Value after calling inc x times should be x");
+  }
+
+  function test_IncByZero() public {
+    vm.expectRevert();
+    counter.incBy(0);
+  }
+}
diff --git a/assignments/1/saving-vault/contracts/vault.sol b/assignments/1/saving-vault/contracts/vault.sol
new file mode 100644
index 00000000..dd6e6fc6
--- /dev/null
+++ b/assignments/1/saving-vault/contracts/vault.sol
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.26;
+
+contract TimelockedVault {
+    
+    enum VaultStatus { 
+        Empty,
+        Locked 
+    }
+
+    struct Vault {
+        uint amount;      
+        uint unlockTime;  
+        VaultStatus status; 
+    }
+
+    mapping(address => Vault) public userVaults;
+
+    event Deposited(address indexed user, uint amount, uint unlockTime);
+    event Withdrawn(address indexed user, uint amount);
+
+    function deposit(uint _lockDurationSeconds) external payable {
+       
+        require(msg.value > 0, "Must deposit some ETH");
+        require(userVaults[msg.sender].status == VaultStatus.Empty, "Vault already active");
+
+        
+        uint unlockTimestamp = block.timestamp + _lockDurationSeconds;
+
+        userVaults[msg.sender] = Vault({
+            amount: msg.value,
+            unlockTime: unlockTimestamp,
+            status: VaultStatus.Locked
+        });
+
+        emit Deposited(msg.sender, msg.value, unlockTimestamp);
+    }
+
+    function withdraw() external {
+        Vault storage myVault = userVaults[msg.sender];
+
+        require(myVault.status == VaultStatus.Locked, "No active vault found");
+        require(block.timestamp >= myVault.unlockTime, "Funds are still locked");
+
+        uint amountToTransfer = myVault.amount;
+
+        
+        delete userVaults[msg.sender];
+
+        // The Transfer
+        (bool success, ) = payable(msg.sender).call{value: amountToTransfer}("");
+        require(success, "Withdrawal failed");
+
+        emit Withdrawn(msg.sender, amountToTransfer);
+    }
+}
\ No newline at end of file
diff --git a/assignments/1/saving-vault/hardhat.config.ts b/assignments/1/saving-vault/hardhat.config.ts
new file mode 100644
index 00000000..1acc094d
--- /dev/null
+++ b/assignments/1/saving-vault/hardhat.config.ts
@@ -0,0 +1,38 @@
+import hardhatToolboxViemPlugin from "@nomicfoundation/hardhat-toolbox-viem";
+import { configVariable, defineConfig } from "hardhat/config";
+
+export default defineConfig({
+  plugins: [hardhatToolboxViemPlugin],
+  solidity: {
+    profiles: {
+      default: {
+        version: "0.8.28",
+      },
+      production: {
+        version: "0.8.28",
+        settings: {
+          optimizer: {
+            enabled: true,
+            runs: 200,
+          },
+        },
+      },
+    },
+  },
+  networks: {
+    hardhatMainnet: {
+      type: "edr-simulated",
+      chainType: "l1",
+    },
+    hardhatOp: {
+      type: "edr-simulated",
+      chainType: "op",
+    },
+    sepolia: {
+      type: "http",
+      chainType: "l1",
+      url: configVariable("SEPOLIA_RPC_URL"),
+      accounts: [configVariable("SEPOLIA_PRIVATE_KEY")],
+    },
+  },
+});
diff --git a/assignments/1/saving-vault/ignition/modules/Counter.ts b/assignments/1/saving-vault/ignition/modules/Counter.ts
new file mode 100644
index 00000000..042e61c8
--- /dev/null
+++ b/assignments/1/saving-vault/ignition/modules/Counter.ts
@@ -0,0 +1,9 @@
+import { buildModule } from "@nomicfoundation/hardhat-ignition/modules";
+
+export default buildModule("CounterModule", (m) => {
+  const counter = m.contract("Counter");
+
+  m.call(counter, "incBy", [5n]);
+
+  return { counter };
+});
diff --git a/assignments/1/saving-vault/package.json b/assignments/1/saving-vault/package.json
new file mode 100644
index 00000000..797d8ffe
--- /dev/null
+++ b/assignments/1/saving-vault/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "saving-vault",
+  "version": "1.0.0",
+  "type": "module",
+  "devDependencies": {
+    "@nomicfoundation/hardhat-ignition": "^3.0.7",
+    "@nomicfoundation/hardhat-toolbox-viem": "^5.0.2",
+    "@types/node": "^22.19.8",
+    "forge-std": "github:foundry-rs/forge-std#v1.9.4",
+    "hardhat": "^3.1.6",
+    "typescript": "~5.8.0",
+    "viem": "^2.45.1"
+  }
+}
diff --git a/assignments/1/saving-vault/scripts/send-op-tx.ts b/assignments/1/saving-vault/scripts/send-op-tx.ts
new file mode 100644
index 00000000..bb738c5c
--- /dev/null
+++ b/assignments/1/saving-vault/scripts/send-op-tx.ts
@@ -0,0 +1,31 @@
+import { network } from "hardhat";
+
+const { viem } = await network.connect({
+  network: "hardhatOp",
+  chainType: "op",
+});
+
+console.log("Sending transaction using the OP chain type");
+
+const publicClient = await viem.getPublicClient();
+const [senderClient] = await viem.getWalletClients();
+
+console.log("Sending 1 wei from", senderClient.account.address, "to itself");
+
+const l1Gas = await publicClient.estimateL1Gas({
+  account: senderClient.account.address,
+  to: senderClient.account.address,
+  value: 1n,
+});
+
+console.log("Estimated L1 gas:", l1Gas);
+
+console.log("Sending L2 transaction");
+const tx = await senderClient.sendTransaction({
+  to: senderClient.account.address,
+  value: 1n,
+});
+
+await publicClient.waitForTransactionReceipt({ hash: tx });
+
+console.log("Transaction sent successfully");
diff --git a/assignments/1/saving-vault/test/Counter.ts b/assignments/1/saving-vault/test/Counter.ts
new file mode 100644
index 00000000..50c2713d
--- /dev/null
+++ b/assignments/1/saving-vault/test/Counter.ts
@@ -0,0 +1,46 @@
+import assert from "node:assert/strict";
+import { describe, it } from "node:test";
+
+import { network } from "hardhat";
+
+describe("Counter", async function () {
+  const { viem } = await network.connect();
+  const publicClient = await viem.getPublicClient();
+
+  it("Should emit the Increment event when calling the inc() function", async function () {
+    const counter = await viem.deployContract("Counter");
+
+    await viem.assertions.emitWithArgs(
+      counter.write.inc(),
+      counter,
+      "Increment",
+      [1n],
+    );
+  });
+
+  it("The sum of the Increment events should match the current value", async function () {
+    const counter = await viem.deployContract("Counter");
+    const deploymentBlockNumber = await publicClient.getBlockNumber();
+
+    // run a series of increments
+    for (let i = 1n; i <= 10n; i++) {
+      await counter.write.incBy([i]);
+    }
+
+    const events = await publicClient.getContractEvents({
+      address: counter.address,
+      abi: counter.abi,
+      eventName: "Increment",
+      fromBlock: deploymentBlockNumber,
+      strict: true,
+    });
+
+    // check that the aggregated events match the current value
+    let total = 0n;
+    for (const event of events) {
+      total += event.args.by;
+    }
+
+    assert.equal(total, await counter.read.x());
+  });
+});
diff --git a/assignments/1/saving-vault/tsconfig.json b/assignments/1/saving-vault/tsconfig.json
new file mode 100644
index 00000000..9b1380cc
--- /dev/null
+++ b/assignments/1/saving-vault/tsconfig.json
@@ -0,0 +1,13 @@
+/* Based on https://github.com/tsconfig/bases/blob/501da2bcd640cf95c95805783e1012b992338f28/bases/node22.json */
+{
+  "compilerOptions": {
+    "lib": ["es2023"],
+    "module": "node16",
+    "target": "es2022",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "moduleResolution": "node16",
+    "outDir": "dist"
+  }
+}
diff --git a/assignments/crowd-funding/.gitignore b/assignments/crowd-funding/.gitignore
new file mode 100644
index 00000000..991a319e
--- /dev/null
+++ b/assignments/crowd-funding/.gitignore
@@ -0,0 +1,20 @@
+# Node modules
+/node_modules
+
+# Compilation output
+/dist
+
+# pnpm deploy output
+/bundle
+
+# Hardhat Build Artifacts
+/artifacts
+
+# Hardhat compilation (v2) support directory
+/cache
+
+# Typechain output
+/types
+
+# Hardhat coverage reports
+/coverage
diff --git a/assignments/crowd-funding/README.md b/assignments/crowd-funding/README.md
new file mode 100644
index 00000000..4743e82a
--- /dev/null
+++ b/assignments/crowd-funding/README.md
@@ -0,0 +1,57 @@
+# Sample Hardhat 3 Beta Project (`node:test` and `viem`)
+
+This project showcases a Hardhat 3 Beta project using the native Node.js test runner (`node:test`) and the `viem` library for Ethereum interactions.
+
+To learn more about the Hardhat 3 Beta, please visit the [Getting Started guide](https://hardhat.org/docs/getting-started#getting-started-with-hardhat-3). To share your feedback, join our [Hardhat 3 Beta](https://hardhat.org/hardhat3-beta-telegram-group) Telegram group or [open an issue](https://github.com/NomicFoundation/hardhat/issues/new) in our GitHub issue tracker.
+
+## Project Overview
+
+This example project includes:
+
+- A simple Hardhat configuration file.
+- Foundry-compatible Solidity unit tests.
+- TypeScript integration tests using [`node:test`](nodejs.org/api/test.html), the new Node.js native test runner, and [`viem`](https://viem.sh/).
+- Examples demonstrating how to connect to different types of networks, including locally simulating OP mainnet.
+
+## Usage
+
+### Running Tests
+
+To run all the tests in the project, execute the following command:
+
+```shell
+npx hardhat test
+```
+
+You can also selectively run the Solidity or `node:test` tests:
+
+```shell
+npx hardhat test solidity
+npx hardhat test nodejs
+```
+
+### Make a deployment to Sepolia
+
+This project includes an example Ignition module to deploy the contract. You can deploy this module to a locally simulated chain or to Sepolia.
+
+To run the deployment to a local chain:
+
+```shell
+npx hardhat ignition deploy ignition/modules/Counter.ts
+```
+
+To run the deployment to Sepolia, you need an account with funds to send the transaction. The provided Hardhat configuration includes a Configuration Variable called `SEPOLIA_PRIVATE_KEY`, which you can use to set the private key of the account you want to use.
+
+You can set the `SEPOLIA_PRIVATE_KEY` variable using the `hardhat-keystore` plugin or by setting it as an environment variable.
+
+To set the `SEPOLIA_PRIVATE_KEY` config variable using `hardhat-keystore`:
+
+```shell
+npx hardhat keystore set SEPOLIA_PRIVATE_KEY
+```
+
+After setting the variable, you can run the deployment with the Sepolia network:
+
+```shell
+npx hardhat ignition deploy --network sepolia ignition/modules/Counter.ts
+```
diff --git a/assignments/crowd-funding/contracts/Counter.sol b/assignments/crowd-funding/contracts/Counter.sol
new file mode 100644
index 00000000..8d00cb7c
--- /dev/null
+++ b/assignments/crowd-funding/contracts/Counter.sol
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+contract Counter {
+  uint public x;
+
+  event Increment(uint by);
+
+  function inc() public {
+    x++;
+    emit Increment(1);
+  }
+
+  function incBy(uint by) public {
+    require(by > 0, "incBy: increment should be positive");
+    x += by;
+    emit Increment(by);
+  }
+}
diff --git a/assignments/crowd-funding/contracts/Counter.t.sol b/assignments/crowd-funding/contracts/Counter.t.sol
new file mode 100644
index 00000000..582fc074
--- /dev/null
+++ b/assignments/crowd-funding/contracts/Counter.t.sol
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+import {Counter} from "./Counter.sol";
+import {Test} from "forge-std/Test.sol";
+
+contract CounterTest is Test {
+  Counter counter;
+
+  function setUp() public {
+    counter = new Counter();
+  }
+
+  function test_InitialValue() public view {
+    require(counter.x() == 0, "Initial value should be 0");
+  }
+
+  function testFuzz_Inc(uint8 x) public {
+    for (uint8 i = 0; i < x; i++) {
+      counter.inc();
+    }
+    require(counter.x() == x, "Value after calling inc x times should be x");
+  }
+
+  function test_IncByZero() public {
+    vm.expectRevert();
+    counter.incBy(0);
+  }
+}
diff --git a/assignments/crowd-funding/contracts/crowd-funding.sol b/assignments/crowd-funding/contracts/crowd-funding.sol
new file mode 100644
index 00000000..e28f729b
--- /dev/null
+++ b/assignments/crowd-funding/contracts/crowd-funding.sol
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.26;
+
+contract Crowdfunding {
+    
+    enum ProjectStatus { 
+        Ongoing, 
+        Successful, 
+        Failed 
+    }
+    ProjectStatus public status;
+
+    struct Project {
+        address owner;
+        uint goal;
+        uint deadline;
+        uint totalRaised;
+    }
+
+        Project public project;
+
+    mapping(address => uint) public contributions;
+
+    event Contributed(address indexed user, uint amount);
+    event GoalReached(uint totalAmount);
+    event RefundClaimed(address indexed user, uint amount);
+
+    modifier onlyOwner() {
+        require(msg.sender == project.owner, "Only owner can call this");
+        _;
+    }
+
+    constructor(uint _goal, uint _durationInSeconds) {
+
+        project = Project({
+            owner: msg.sender,
+            goal: _goal,
+            deadline: block.timestamp + _durationInSeconds,
+            totalRaised: 0
+        });
+        status = ProjectStatus.Ongoing;
+    }
+
+    function contribute() external payable {
+        require(block.timestamp < project.deadline, "Deadline has passed");
+        require(msg.value > 0, "Contribution must be > 0");
+        require(status == ProjectStatus.Ongoing, "Project no longer accepting funds");
+
+        contributions[msg.sender] += msg.value;
+
+        // Update the total in STRUCT
+        project.totalRaised += msg.value;
+
+        emit Contributed(msg.sender, msg.value);
+    }
+
+    // Owner withdraws if goal is met
+    function withdrawFunds() external onlyOwner {
+        require(project.totalRaised >= project.goal, "Goal not reached");
+        require(block.timestamp >= project.deadline, "Deadline not reached yet");
+        
+        status = ProjectStatus.Successful;
+        uint amount = address(this).balance;
+
+        (bool success, ) = payable(project.owner).call{value: amount}("");
+        require(success, "Transfer failed");
+    }
+
+    // Contributors get money back i f goal is NOT met
+    function claimRefund() external {
+       
+        require(block.timestamp >= project.deadline, "Deadline not reached yet");
+        require(project.totalRaised < project.goal, "Goal was met, no refunds");
+        
+        uint amountToRefund = contributions[msg.sender];
+        require(amountToRefund > 0, "No funds to claim");
+
+        contributions[msg.sender] = 0;
+        
+        status = ProjectStatus.Failed;
+
+        (bool success, ) = payable(msg.sender).call{value: amountToRefund}("");
+        require(success, "Refund failed");
+
+        emit RefundClaimed(msg.sender, amountToRefund);
+    }
+}
\ No newline at end of file
diff --git a/assignments/crowd-funding/hardhat.config.ts b/assignments/crowd-funding/hardhat.config.ts
new file mode 100644
index 00000000..1acc094d
--- /dev/null
+++ b/assignments/crowd-funding/hardhat.config.ts
@@ -0,0 +1,38 @@
+import hardhatToolboxViemPlugin from "@nomicfoundation/hardhat-toolbox-viem";
+import { configVariable, defineConfig } from "hardhat/config";
+
+export default defineConfig({
+  plugins: [hardhatToolboxViemPlugin],
+  solidity: {
+    profiles: {
+      default: {
+        version: "0.8.28",
+      },
+      production: {
+        version: "0.8.28",
+        settings: {
+          optimizer: {
+            enabled: true,
+            runs: 200,
+          },
+        },
+      },
+    },
+  },
+  networks: {
+    hardhatMainnet: {
+      type: "edr-simulated",
+      chainType: "l1",
+    },
+    hardhatOp: {
+      type: "edr-simulated",
+      chainType: "op",
+    },
+    sepolia: {
+      type: "http",
+      chainType: "l1",
+      url: configVariable("SEPOLIA_RPC_URL"),
+      accounts: [configVariable("SEPOLIA_PRIVATE_KEY")],
+    },
+  },
+});
diff --git a/assignments/crowd-funding/ignition/modules/Counter.ts b/assignments/crowd-funding/ignition/modules/Counter.ts
new file mode 100644
index 00000000..042e61c8
--- /dev/null
+++ b/assignments/crowd-funding/ignition/modules/Counter.ts
@@ -0,0 +1,9 @@
+import { buildModule } from "@nomicfoundation/hardhat-ignition/modules";
+
+export default buildModule("CounterModule", (m) => {
+  const counter = m.contract("Counter");
+
+  m.call(counter, "incBy", [5n]);
+
+  return { counter };
+});
diff --git a/assignments/crowd-funding/package.json b/assignments/crowd-funding/package.json
new file mode 100644
index 00000000..d40004a7
--- /dev/null
+++ b/assignments/crowd-funding/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "crowd-funding",
+  "version": "1.0.0",
+  "type": "module",
+  "devDependencies": {
+    "@nomicfoundation/hardhat-ignition": "^3.0.7",
+    "@nomicfoundation/hardhat-toolbox-viem": "^5.0.2",
+    "@types/node": "^22.19.8",
+    "forge-std": "github:foundry-rs/forge-std#v1.9.4",
+    "hardhat": "^3.1.6",
+    "typescript": "~5.8.0",
+    "viem": "^2.45.1"
+  }
+}
diff --git a/assignments/crowd-funding/scripts/send-op-tx.ts b/assignments/crowd-funding/scripts/send-op-tx.ts
new file mode 100644
index 00000000..bb738c5c
--- /dev/null
+++ b/assignments/crowd-funding/scripts/send-op-tx.ts
@@ -0,0 +1,31 @@
+import { network } from "hardhat";
+
+const { viem } = await network.connect({
+  network: "hardhatOp",
+  chainType: "op",
+});
+
+console.log("Sending transaction using the OP chain type");
+
+const publicClient = await viem.getPublicClient();
+const [senderClient] = await viem.getWalletClients();
+
+console.log("Sending 1 wei from", senderClient.account.address, "to itself");
+
+const l1Gas = await publicClient.estimateL1Gas({
+  account: senderClient.account.address,
+  to: senderClient.account.address,
+  value: 1n,
+});
+
+console.log("Estimated L1 gas:", l1Gas);
+
+console.log("Sending L2 transaction");
+const tx = await senderClient.sendTransaction({
+  to: senderClient.account.address,
+  value: 1n,
+});
+
+await publicClient.waitForTransactionReceipt({ hash: tx });
+
+console.log("Transaction sent successfully");
diff --git a/assignments/crowd-funding/test/Counter.ts b/assignments/crowd-funding/test/Counter.ts
new file mode 100644
index 00000000..50c2713d
--- /dev/null
+++ b/assignments/crowd-funding/test/Counter.ts
@@ -0,0 +1,46 @@
+import assert from "node:assert/strict";
+import { describe, it } from "node:test";
+
+import { network } from "hardhat";
+
+describe("Counter", async function () {
+  const { viem } = await network.connect();
+  const publicClient = await viem.getPublicClient();
+
+  it("Should emit the Increment event when calling the inc() function", async function () {
+    const counter = await viem.deployContract("Counter");
+
+    await viem.assertions.emitWithArgs(
+      counter.write.inc(),
+      counter,
+      "Increment",
+      [1n],
+    );
+  });
+
+  it("The sum of the Increment events should match the current value", async function () {
+    const counter = await viem.deployContract("Counter");
+    const deploymentBlockNumber = await publicClient.getBlockNumber();
+
+    // run a series of increments
+    for (let i = 1n; i <= 10n; i++) {
+      await counter.write.incBy([i]);
+    }
+
+    const events = await publicClient.getContractEvents({
+      address: counter.address,
+      abi: counter.abi,
+      eventName: "Increment",
+      fromBlock: deploymentBlockNumber,
+      strict: true,
+    });
+
+    // check that the aggregated events match the current value
+    let total = 0n;
+    for (const event of events) {
+      total += event.args.by;
+    }
+
+    assert.equal(total, await counter.read.x());
+  });
+});
diff --git a/assignments/crowd-funding/tsconfig.json b/assignments/crowd-funding/tsconfig.json
new file mode 100644
index 00000000..9b1380cc
--- /dev/null
+++ b/assignments/crowd-funding/tsconfig.json
@@ -0,0 +1,13 @@
+/* Based on https://github.com/tsconfig/bases/blob/501da2bcd640cf95c95805783e1012b992338f28/bases/node22.json */
+{
+  "compilerOptions": {
+    "lib": ["es2023"],
+    "module": "node16",
+    "target": "es2022",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "moduleResolution": "node16",
+    "outDir": "dist"
+  }
+}
diff --git a/assignments/escrow-agent/.gitignore b/assignments/escrow-agent/.gitignore
new file mode 100644
index 00000000..991a319e
--- /dev/null
+++ b/assignments/escrow-agent/.gitignore
@@ -0,0 +1,20 @@
+# Node modules
+/node_modules
+
+# Compilation output
+/dist
+
+# pnpm deploy output
+/bundle
+
+# Hardhat Build Artifacts
+/artifacts
+
+# Hardhat compilation (v2) support directory
+/cache
+
+# Typechain output
+/types
+
+# Hardhat coverage reports
+/coverage
diff --git a/assignments/escrow-agent/README.md b/assignments/escrow-agent/README.md
new file mode 100644
index 00000000..968246e9
--- /dev/null
+++ b/assignments/escrow-agent/README.md
@@ -0,0 +1,57 @@
+# Sample Hardhat 3 Beta Project (`mocha` and `ethers`)
+
+This project showcases a Hardhat 3 Beta project using `mocha` for tests and the `ethers` library for Ethereum interactions.
+
+To learn more about the Hardhat 3 Beta, please visit the [Getting Started guide](https://hardhat.org/docs/getting-started#getting-started-with-hardhat-3). To share your feedback, join our [Hardhat 3 Beta](https://hardhat.org/hardhat3-beta-telegram-group) Telegram group or [open an issue](https://github.com/NomicFoundation/hardhat/issues/new) in our GitHub issue tracker.
+
+## Project Overview
+
+This example project includes:
+
+- A simple Hardhat configuration file.
+- Foundry-compatible Solidity unit tests.
+- TypeScript integration tests using `mocha` and ethers.js
+- Examples demonstrating how to connect to different types of networks, including locally simulating OP mainnet.
+
+## Usage
+
+### Running Tests
+
+To run all the tests in the project, execute the following command:
+
+```shell
+npx hardhat test
+```
+
+You can also selectively run the Solidity or `mocha` tests:
+
+```shell
+npx hardhat test solidity
+npx hardhat test mocha
+```
+
+### Make a deployment to Sepolia
+
+This project includes an example Ignition module to deploy the contract. You can deploy this module to a locally simulated chain or to Sepolia.
+
+To run the deployment to a local chain:
+
+```shell
+npx hardhat ignition deploy ignition/modules/Counter.ts
+```
+
+To run the deployment to Sepolia, you need an account with funds to send the transaction. The provided Hardhat configuration includes a Configuration Variable called `SEPOLIA_PRIVATE_KEY`, which you can use to set the private key of the account you want to use.
+
+You can set the `SEPOLIA_PRIVATE_KEY` variable using the `hardhat-keystore` plugin or by setting it as an environment variable.
+
+To set the `SEPOLIA_PRIVATE_KEY` config variable using `hardhat-keystore`:
+
+```shell
+npx hardhat keystore set SEPOLIA_PRIVATE_KEY
+```
+
+After setting the variable, you can run the deployment with the Sepolia network:
+
+```shell
+npx hardhat ignition deploy --network sepolia ignition/modules/Counter.ts
+```
diff --git a/assignments/escrow-agent/contracts/Counter.sol b/assignments/escrow-agent/contracts/Counter.sol
new file mode 100644
index 00000000..8d00cb7c
--- /dev/null
+++ b/assignments/escrow-agent/contracts/Counter.sol
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+contract Counter {
+  uint public x;
+
+  event Increment(uint by);
+
+  function inc() public {
+    x++;
+    emit Increment(1);
+  }
+
+  function incBy(uint by) public {
+    require(by > 0, "incBy: increment should be positive");
+    x += by;
+    emit Increment(by);
+  }
+}
diff --git a/assignments/escrow-agent/contracts/Counter.t.sol b/assignments/escrow-agent/contracts/Counter.t.sol
new file mode 100644
index 00000000..ac71d5b8
--- /dev/null
+++ b/assignments/escrow-agent/contracts/Counter.t.sol
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+import {Counter} from "./Counter.sol";
+import {Test} from "forge-std/Test.sol";
+
+// Solidity tests are compatible with foundry, so they
+// use the same syntax and offer the same functionality.
+
+contract CounterTest is Test {
+  Counter counter;
+
+  function setUp() public {
+    counter = new Counter();
+  }
+
+  function test_InitialValue() public view {
+    require(counter.x() == 0, "Initial value should be 0");
+  }
+
+  function testFuzz_Inc(uint8 x) public {
+    for (uint8 i = 0; i < x; i++) {
+      counter.inc();
+    }
+    require(counter.x() == x, "Value after calling inc x times should be x");
+  }
+
+  function test_IncByZero() public {
+    vm.expectRevert();
+    counter.incBy(0);
+  }
+}
diff --git a/assignments/escrow-agent/contracts/Escrow.sol b/assignments/escrow-agent/contracts/Escrow.sol
new file mode 100644
index 00000000..c8dd44ed
--- /dev/null
+++ b/assignments/escrow-agent/contracts/Escrow.sol
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.26;
+
+
+contract Escrow {
+    address public buyer;
+    address public seller;
+    uint public amount;
+    
+    enum Status { NotPaid, Paid, Done }
+    Status public status;
+
+    event FundsReceived(address indexed buyer, uint amount);
+    event FundsRedeemed(address indexed seller, uint amount);
+
+    constructor(address _buyer, address _seller) {
+        buyer = _buyer;
+        seller = _seller;
+        status = Status.NotPaid;
+    }
+
+    // Party B (Buyer) pays the money into this specific contract
+    function pay() external payable {
+        require(msg.sender == buyer, "Only buyer can pay");
+        require(status == Status.NotPaid, "Already paid");
+        require(msg.value > 0, "Must send ETH");
+        
+        amount = msg.value;
+        status = Status.Paid;
+        emit FundsReceived(msg.sender, msg.value);
+    }
+
+    // Buyer confirms receipt and releases money to Seller
+    function redeem() external {
+        require(msg.sender == buyer, "Only buyer can redeem");
+        require(status == Status.Paid, "Funds not deposited or already released");
+
+        status = Status.Done;
+        uint payout = amount;
+        amount = 0; // Reset amount for security
+
+        (bool success, ) = payable(seller).call{value: payout}("");
+        require(success, "Transfer to seller failed");
+        
+        emit FundsRedeemed(seller, payout);
+    }
+}
+
+    // EscrowFactory
+ 
+contract EscrowFactory {
+    address[] public allEscrows;
+
+    event EscrowCreated(address indexed escrowAddress, address indexed buyer, address indexed seller);
+
+    // Creates a new Escrow contract
+    function createEscrow(address _seller) external returns (address) {
+        
+        Escrow newEscrow = new Escrow(msg.sender, _seller);
+        
+        address escrowAddress = address(newEscrow);
+        allEscrows.push(escrowAddress);
+        
+        emit EscrowCreated(escrowAddress, msg.sender, _seller);
+        return escrowAddress;
+    }
+
+    // Helper function to get all escrows for the frontend
+    function getAllEscrows() external view returns (address[] memory) {
+        return allEscrows;
+    }
+}
\ No newline at end of file
diff --git a/assignments/escrow-agent/hardhat.config.ts b/assignments/escrow-agent/hardhat.config.ts
new file mode 100644
index 00000000..7092b852
--- /dev/null
+++ b/assignments/escrow-agent/hardhat.config.ts
@@ -0,0 +1,38 @@
+import hardhatToolboxMochaEthersPlugin from "@nomicfoundation/hardhat-toolbox-mocha-ethers";
+import { configVariable, defineConfig } from "hardhat/config";
+
+export default defineConfig({
+  plugins: [hardhatToolboxMochaEthersPlugin],
+  solidity: {
+    profiles: {
+      default: {
+        version: "0.8.28",
+      },
+      production: {
+        version: "0.8.28",
+        settings: {
+          optimizer: {
+            enabled: true,
+            runs: 200,
+          },
+        },
+      },
+    },
+  },
+  networks: {
+    hardhatMainnet: {
+      type: "edr-simulated",
+      chainType: "l1",
+    },
+    hardhatOp: {
+      type: "edr-simulated",
+      chainType: "op",
+    },
+    sepolia: {
+      type: "http",
+      chainType: "l1",
+      url: configVariable("SEPOLIA_RPC_URL"),
+      accounts: [configVariable("SEPOLIA_PRIVATE_KEY")],
+    },
+  },
+});
diff --git a/assignments/escrow-agent/ignition/modules/Counter.ts b/assignments/escrow-agent/ignition/modules/Counter.ts
new file mode 100644
index 00000000..042e61c8
--- /dev/null
+++ b/assignments/escrow-agent/ignition/modules/Counter.ts
@@ -0,0 +1,9 @@
+import { buildModule } from "@nomicfoundation/hardhat-ignition/modules";
+
+export default buildModule("CounterModule", (m) => {
+  const counter = m.contract("Counter");
+
+  m.call(counter, "incBy", [5n]);
+
+  return { counter };
+});
diff --git a/assignments/escrow-agent/package.json b/assignments/escrow-agent/package.json
new file mode 100644
index 00000000..528d273a
--- /dev/null
+++ b/assignments/escrow-agent/package.json
@@ -0,0 +1,20 @@
+{
+  "name": "escrow-agent",
+  "version": "1.0.0",
+  "type": "module",
+  "devDependencies": {
+    "@nomicfoundation/hardhat-ethers": "^4.0.4",
+    "@nomicfoundation/hardhat-ignition": "^3.0.7",
+    "@nomicfoundation/hardhat-toolbox-mocha-ethers": "^3.0.2",
+    "@types/chai": "^4.3.20",
+    "@types/chai-as-promised": "^8.0.2",
+    "@types/mocha": "^10.0.10",
+    "@types/node": "^22.19.8",
+    "chai": "^5.3.3",
+    "ethers": "^6.16.0",
+    "forge-std": "github:foundry-rs/forge-std#v1.9.4",
+    "hardhat": "^3.1.6",
+    "mocha": "^11.7.5",
+    "typescript": "~5.8.0"
+  }
+}
diff --git a/assignments/escrow-agent/scripts/send-op-tx.ts b/assignments/escrow-agent/scripts/send-op-tx.ts
new file mode 100644
index 00000000..c10a2360
--- /dev/null
+++ b/assignments/escrow-agent/scripts/send-op-tx.ts
@@ -0,0 +1,22 @@
+import { network } from "hardhat";
+
+const { ethers } = await network.connect({
+  network: "hardhatOp",
+  chainType: "op",
+});
+
+console.log("Sending transaction using the OP chain type");
+
+const [sender] = await ethers.getSigners();
+
+console.log("Sending 1 wei from", sender.address, "to itself");
+
+console.log("Sending L2 transaction");
+const tx = await sender.sendTransaction({
+  to: sender.address,
+  value: 1n,
+});
+
+await tx.wait();
+
+console.log("Transaction sent successfully");
diff --git a/assignments/escrow-agent/test/Counter.ts b/assignments/escrow-agent/test/Counter.ts
new file mode 100644
index 00000000..f8c38986
--- /dev/null
+++ b/assignments/escrow-agent/test/Counter.ts
@@ -0,0 +1,36 @@
+import { expect } from "chai";
+import { network } from "hardhat";
+
+const { ethers } = await network.connect();
+
+describe("Counter", function () {
+  it("Should emit the Increment event when calling the inc() function", async function () {
+    const counter = await ethers.deployContract("Counter");
+
+    await expect(counter.inc()).to.emit(counter, "Increment").withArgs(1n);
+  });
+
+  it("The sum of the Increment events should match the current value", async function () {
+    const counter = await ethers.deployContract("Counter");
+    const deploymentBlockNumber = await ethers.provider.getBlockNumber();
+
+    // run a series of increments
+    for (let i = 1; i <= 10; i++) {
+      await counter.incBy(i);
+    }
+
+    const events = await counter.queryFilter(
+      counter.filters.Increment(),
+      deploymentBlockNumber,
+      "latest",
+    );
+
+    // check that the aggregated events match the current value
+    let total = 0n;
+    for (const event of events) {
+      total += event.args.by;
+    }
+
+    expect(await counter.x()).to.equal(total);
+  });
+});
diff --git a/assignments/escrow-agent/tsconfig.json b/assignments/escrow-agent/tsconfig.json
new file mode 100644
index 00000000..9b1380cc
--- /dev/null
+++ b/assignments/escrow-agent/tsconfig.json
@@ -0,0 +1,13 @@
+/* Based on https://github.com/tsconfig/bases/blob/501da2bcd640cf95c95805783e1012b992338f28/bases/node22.json */
+{
+  "compilerOptions": {
+    "lib": ["es2023"],
+    "module": "node16",
+    "target": "es2022",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "moduleResolution": "node16",
+    "outDir": "dist"
+  }
+}
diff --git a/assignments/freelance-escrow/.gitignore b/assignments/freelance-escrow/.gitignore
new file mode 100644
index 00000000..991a319e
--- /dev/null
+++ b/assignments/freelance-escrow/.gitignore
@@ -0,0 +1,20 @@
+# Node modules
+/node_modules
+
+# Compilation output
+/dist
+
+# pnpm deploy output
+/bundle
+
+# Hardhat Build Artifacts
+/artifacts
+
+# Hardhat compilation (v2) support directory
+/cache
+
+# Typechain output
+/types
+
+# Hardhat coverage reports
+/coverage
diff --git a/assignments/freelance-escrow/README.md b/assignments/freelance-escrow/README.md
new file mode 100644
index 00000000..4743e82a
--- /dev/null
+++ b/assignments/freelance-escrow/README.md
@@ -0,0 +1,57 @@
+# Sample Hardhat 3 Beta Project (`node:test` and `viem`)
+
+This project showcases a Hardhat 3 Beta project using the native Node.js test runner (`node:test`) and the `viem` library for Ethereum interactions.
+
+To learn more about the Hardhat 3 Beta, please visit the [Getting Started guide](https://hardhat.org/docs/getting-started#getting-started-with-hardhat-3). To share your feedback, join our [Hardhat 3 Beta](https://hardhat.org/hardhat3-beta-telegram-group) Telegram group or [open an issue](https://github.com/NomicFoundation/hardhat/issues/new) in our GitHub issue tracker.
+
+## Project Overview
+
+This example project includes:
+
+- A simple Hardhat configuration file.
+- Foundry-compatible Solidity unit tests.
+- TypeScript integration tests using [`node:test`](nodejs.org/api/test.html), the new Node.js native test runner, and [`viem`](https://viem.sh/).
+- Examples demonstrating how to connect to different types of networks, including locally simulating OP mainnet.
+
+## Usage
+
+### Running Tests
+
+To run all the tests in the project, execute the following command:
+
+```shell
+npx hardhat test
+```
+
+You can also selectively run the Solidity or `node:test` tests:
+
+```shell
+npx hardhat test solidity
+npx hardhat test nodejs
+```
+
+### Make a deployment to Sepolia
+
+This project includes an example Ignition module to deploy the contract. You can deploy this module to a locally simulated chain or to Sepolia.
+
+To run the deployment to a local chain:
+
+```shell
+npx hardhat ignition deploy ignition/modules/Counter.ts
+```
+
+To run the deployment to Sepolia, you need an account with funds to send the transaction. The provided Hardhat configuration includes a Configuration Variable called `SEPOLIA_PRIVATE_KEY`, which you can use to set the private key of the account you want to use.
+
+You can set the `SEPOLIA_PRIVATE_KEY` variable using the `hardhat-keystore` plugin or by setting it as an environment variable.
+
+To set the `SEPOLIA_PRIVATE_KEY` config variable using `hardhat-keystore`:
+
+```shell
+npx hardhat keystore set SEPOLIA_PRIVATE_KEY
+```
+
+After setting the variable, you can run the deployment with the Sepolia network:
+
+```shell
+npx hardhat ignition deploy --network sepolia ignition/modules/Counter.ts
+```
diff --git a/assignments/freelance-escrow/contracts/Counter.sol b/assignments/freelance-escrow/contracts/Counter.sol
new file mode 100644
index 00000000..8d00cb7c
--- /dev/null
+++ b/assignments/freelance-escrow/contracts/Counter.sol
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+contract Counter {
+  uint public x;
+
+  event Increment(uint by);
+
+  function inc() public {
+    x++;
+    emit Increment(1);
+  }
+
+  function incBy(uint by) public {
+    require(by > 0, "incBy: increment should be positive");
+    x += by;
+    emit Increment(by);
+  }
+}
diff --git a/assignments/freelance-escrow/contracts/Counter.t.sol b/assignments/freelance-escrow/contracts/Counter.t.sol
new file mode 100644
index 00000000..582fc074
--- /dev/null
+++ b/assignments/freelance-escrow/contracts/Counter.t.sol
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+import {Counter} from "./Counter.sol";
+import {Test} from "forge-std/Test.sol";
+
+contract CounterTest is Test {
+  Counter counter;
+
+  function setUp() public {
+    counter = new Counter();
+  }
+
+  function test_InitialValue() public view {
+    require(counter.x() == 0, "Initial value should be 0");
+  }
+
+  function testFuzz_Inc(uint8 x) public {
+    for (uint8 i = 0; i < x; i++) {
+      counter.inc();
+    }
+    require(counter.x() == x, "Value after calling inc x times should be x");
+  }
+
+  function test_IncByZero() public {
+    vm.expectRevert();
+    counter.incBy(0);
+  }
+}
diff --git a/assignments/freelance-escrow/contracts/escrow.sol b/assignments/freelance-escrow/contracts/escrow.sol
new file mode 100644
index 00000000..39b1f328
--- /dev/null
+++ b/assignments/freelance-escrow/contracts/escrow.sol
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.26;
+
+contract MilestoneEscrow {
+   
+    enum JobStatus { 
+     AwaitingPayment,
+     InProgress,
+     Completed 
+    }
+
+    JobStatus public status;
+
+    struct Milestone {
+        string taskName;
+        uint payout;
+        bool isFinished;
+    }
+
+    mapping(uint => Milestone) public milestones;
+    
+    mapping(address => uint) public totalEarnings;
+
+    address public client;
+    address public freelancer;
+    uint public totalMilestones;
+    uint public currentMilestone;
+
+    modifier onlyClient() {
+        require(msg.sender == client, "Not the client");
+        _;
+    }
+
+    constructor(address _freelancer, uint _numMilestones, uint _payPerMilestone) {
+        client = msg.sender;
+        freelancer = _freelancer;
+        totalMilestones = _numMilestones;
+        status = JobStatus.AwaitingPayment;
+        
+    }
+
+    // Client funds the contract
+    function depositFunds() external payable onlyClient {
+        require(msg.value > 0, "Must fund the contract");
+        status = JobStatus.InProgress;
+    }
+
+    function releaseNextMilestone(string memory _taskName, uint _payout) external onlyClient {
+        require(status == JobStatus.InProgress, "Job not active");
+        require(currentMilestone < totalMilestones, "All milestones finished");
+
+
+        Milestone storage m = milestones[currentMilestone];
+        m.taskName = _taskName;
+        m.payout = _payout;
+        m.isFinished = true;
+
+        currentMilestone++;
+
+        if (currentMilestone == totalMilestones) {
+            status = JobStatus.Completed;
+        }
+
+        totalEarnings[freelancer] += _payout;
+
+        // Send money
+        (bool success, ) = payable(freelancer).call{value: _payout}("");
+        require(success, "Transfer failed");
+    }
+}
\ No newline at end of file
diff --git a/assignments/freelance-escrow/hardhat.config.ts b/assignments/freelance-escrow/hardhat.config.ts
new file mode 100644
index 00000000..1acc094d
--- /dev/null
+++ b/assignments/freelance-escrow/hardhat.config.ts
@@ -0,0 +1,38 @@
+import hardhatToolboxViemPlugin from "@nomicfoundation/hardhat-toolbox-viem";
+import { configVariable, defineConfig } from "hardhat/config";
+
+export default defineConfig({
+  plugins: [hardhatToolboxViemPlugin],
+  solidity: {
+    profiles: {
+      default: {
+        version: "0.8.28",
+      },
+      production: {
+        version: "0.8.28",
+        settings: {
+          optimizer: {
+            enabled: true,
+            runs: 200,
+          },
+        },
+      },
+    },
+  },
+  networks: {
+    hardhatMainnet: {
+      type: "edr-simulated",
+      chainType: "l1",
+    },
+    hardhatOp: {
+      type: "edr-simulated",
+      chainType: "op",
+    },
+    sepolia: {
+      type: "http",
+      chainType: "l1",
+      url: configVariable("SEPOLIA_RPC_URL"),
+      accounts: [configVariable("SEPOLIA_PRIVATE_KEY")],
+    },
+  },
+});
diff --git a/assignments/freelance-escrow/ignition/modules/Counter.ts b/assignments/freelance-escrow/ignition/modules/Counter.ts
new file mode 100644
index 00000000..042e61c8
--- /dev/null
+++ b/assignments/freelance-escrow/ignition/modules/Counter.ts
@@ -0,0 +1,9 @@
+import { buildModule } from "@nomicfoundation/hardhat-ignition/modules";
+
+export default buildModule("CounterModule", (m) => {
+  const counter = m.contract("Counter");
+
+  m.call(counter, "incBy", [5n]);
+
+  return { counter };
+});
diff --git a/assignments/freelance-escrow/package.json b/assignments/freelance-escrow/package.json
new file mode 100644
index 00000000..dcc8b55a
--- /dev/null
+++ b/assignments/freelance-escrow/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "freelance-escrow",
+  "version": "1.0.0",
+  "type": "module",
+  "devDependencies": {
+    "@nomicfoundation/hardhat-ignition": "^3.0.7",
+    "@nomicfoundation/hardhat-toolbox-viem": "^5.0.2",
+    "@types/node": "^22.19.8",
+    "forge-std": "github:foundry-rs/forge-std#v1.9.4",
+    "hardhat": "^3.1.6",
+    "typescript": "~5.8.0",
+    "viem": "^2.45.1"
+  }
+}
diff --git a/assignments/freelance-escrow/scripts/send-op-tx.ts b/assignments/freelance-escrow/scripts/send-op-tx.ts
new file mode 100644
index 00000000..bb738c5c
--- /dev/null
+++ b/assignments/freelance-escrow/scripts/send-op-tx.ts
@@ -0,0 +1,31 @@
+import { network } from "hardhat";
+
+const { viem } = await network.connect({
+  network: "hardhatOp",
+  chainType: "op",
+});
+
+console.log("Sending transaction using the OP chain type");
+
+const publicClient = await viem.getPublicClient();
+const [senderClient] = await viem.getWalletClients();
+
+console.log("Sending 1 wei from", senderClient.account.address, "to itself");
+
+const l1Gas = await publicClient.estimateL1Gas({
+  account: senderClient.account.address,
+  to: senderClient.account.address,
+  value: 1n,
+});
+
+console.log("Estimated L1 gas:", l1Gas);
+
+console.log("Sending L2 transaction");
+const tx = await senderClient.sendTransaction({
+  to: senderClient.account.address,
+  value: 1n,
+});
+
+await publicClient.waitForTransactionReceipt({ hash: tx });
+
+console.log("Transaction sent successfully");
diff --git a/assignments/freelance-escrow/test/Counter.ts b/assignments/freelance-escrow/test/Counter.ts
new file mode 100644
index 00000000..50c2713d
--- /dev/null
+++ b/assignments/freelance-escrow/test/Counter.ts
@@ -0,0 +1,46 @@
+import assert from "node:assert/strict";
+import { describe, it } from "node:test";
+
+import { network } from "hardhat";
+
+describe("Counter", async function () {
+  const { viem } = await network.connect();
+  const publicClient = await viem.getPublicClient();
+
+  it("Should emit the Increment event when calling the inc() function", async function () {
+    const counter = await viem.deployContract("Counter");
+
+    await viem.assertions.emitWithArgs(
+      counter.write.inc(),
+      counter,
+      "Increment",
+      [1n],
+    );
+  });
+
+  it("The sum of the Increment events should match the current value", async function () {
+    const counter = await viem.deployContract("Counter");
+    const deploymentBlockNumber = await publicClient.getBlockNumber();
+
+    // run a series of increments
+    for (let i = 1n; i <= 10n; i++) {
+      await counter.write.incBy([i]);
+    }
+
+    const events = await publicClient.getContractEvents({
+      address: counter.address,
+      abi: counter.abi,
+      eventName: "Increment",
+      fromBlock: deploymentBlockNumber,
+      strict: true,
+    });
+
+    // check that the aggregated events match the current value
+    let total = 0n;
+    for (const event of events) {
+      total += event.args.by;
+    }
+
+    assert.equal(total, await counter.read.x());
+  });
+});
diff --git a/assignments/freelance-escrow/tsconfig.json b/assignments/freelance-escrow/tsconfig.json
new file mode 100644
index 00000000..9b1380cc
--- /dev/null
+++ b/assignments/freelance-escrow/tsconfig.json
@@ -0,0 +1,13 @@
+/* Based on https://github.com/tsconfig/bases/blob/501da2bcd640cf95c95805783e1012b992338f28/bases/node22.json */
+{
+  "compilerOptions": {
+    "lib": ["es2023"],
+    "module": "node16",
+    "target": "es2022",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "moduleResolution": "node16",
+    "outDir": "dist"
+  }
+}
diff --git a/assignments/todo/.gitignore b/assignments/todo/.gitignore
new file mode 100644
index 00000000..991a319e
--- /dev/null
+++ b/assignments/todo/.gitignore
@@ -0,0 +1,20 @@
+# Node modules
+/node_modules
+
+# Compilation output
+/dist
+
+# pnpm deploy output
+/bundle
+
+# Hardhat Build Artifacts
+/artifacts
+
+# Hardhat compilation (v2) support directory
+/cache
+
+# Typechain output
+/types
+
+# Hardhat coverage reports
+/coverage
diff --git a/assignments/todo/README.md b/assignments/todo/README.md
new file mode 100644
index 00000000..968246e9
--- /dev/null
+++ b/assignments/todo/README.md
@@ -0,0 +1,57 @@
+# Sample Hardhat 3 Beta Project (`mocha` and `ethers`)
+
+This project showcases a Hardhat 3 Beta project using `mocha` for tests and the `ethers` library for Ethereum interactions.
+
+To learn more about the Hardhat 3 Beta, please visit the [Getting Started guide](https://hardhat.org/docs/getting-started#getting-started-with-hardhat-3). To share your feedback, join our [Hardhat 3 Beta](https://hardhat.org/hardhat3-beta-telegram-group) Telegram group or [open an issue](https://github.com/NomicFoundation/hardhat/issues/new) in our GitHub issue tracker.
+
+## Project Overview
+
+This example project includes:
+
+- A simple Hardhat configuration file.
+- Foundry-compatible Solidity unit tests.
+- TypeScript integration tests using `mocha` and ethers.js
+- Examples demonstrating how to connect to different types of networks, including locally simulating OP mainnet.
+
+## Usage
+
+### Running Tests
+
+To run all the tests in the project, execute the following command:
+
+```shell
+npx hardhat test
+```
+
+You can also selectively run the Solidity or `mocha` tests:
+
+```shell
+npx hardhat test solidity
+npx hardhat test mocha
+```
+
+### Make a deployment to Sepolia
+
+This project includes an example Ignition module to deploy the contract. You can deploy this module to a locally simulated chain or to Sepolia.
+
+To run the deployment to a local chain:
+
+```shell
+npx hardhat ignition deploy ignition/modules/Counter.ts
+```
+
+To run the deployment to Sepolia, you need an account with funds to send the transaction. The provided Hardhat configuration includes a Configuration Variable called `SEPOLIA_PRIVATE_KEY`, which you can use to set the private key of the account you want to use.
+
+You can set the `SEPOLIA_PRIVATE_KEY` variable using the `hardhat-keystore` plugin or by setting it as an environment variable.
+
+To set the `SEPOLIA_PRIVATE_KEY` config variable using `hardhat-keystore`:
+
+```shell
+npx hardhat keystore set SEPOLIA_PRIVATE_KEY
+```
+
+After setting the variable, you can run the deployment with the Sepolia network:
+
+```shell
+npx hardhat ignition deploy --network sepolia ignition/modules/Counter.ts
+```
diff --git a/assignments/todo/contracts/Todo.sol b/assignments/todo/contracts/Todo.sol
new file mode 100644
index 00000000..351e3a86
--- /dev/null
+++ b/assignments/todo/contracts/Todo.sol
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity 0.8.28;
+contract Todo{
+    uint256 todoCounter;
+
+    enum Status{
+        Pending,
+        Done,
+        Cancelled,
+        Defaulted
+    }
+
+    struct TodoList{
+        uint id;
+        address owner;
+        string text;
+        Status status;
+        uint256 deadline;
+    }
+
+    mapping(uint => TodoList) todos;
+    mapping(address => uint[]) userTodoIds;
+
+    event TodoCreated(string text, uint deadline);
+    event TodoMarkedDone(uint id);
+    event TodoCancelled(uint id);
+    event TodoUpdated(uint id, string newText, uint newDeadline);
+
+function createTodo(string memory _text, uint _deadline) external returns(uint){
+    require(bytes(_text).length > 0, "Empty text");
+    require(_deadline > (block.timestamp + 600), "Invalid deadline");
+    require(msg.sender != address(0), "Zero address");
+
+    todoCounter++;
+
+    todos[todoCounter] = TodoList(todoCounter, msg.sender, _text, Status.Pending, _deadline);
+    userTodoIds[msg.sender].push(todoCounter);
+
+    emit TodoCreated(_text, _deadline);
+    return todoCounter;    
+}
+
+function markAsDone(uint _id) external {
+    require((_id > 0) && (_id <= todoCounter) , 'invalid id');
+    TodoList storage todo = todos[_id];
+    require(todo.status == Status.Pending, "Not pending");
+    require(msg.sender == todo.owner, "unauthorized Caller");
+
+    if(block.timestamp > todo.deadline){
+        todo.status = Status.Defaulted;
+    }
+    else{
+    todo.status = Status.Done;
+    }
+
+    emit TodoMarkedDone(_id);
+}
+
+function cancelTodo(uint _id) external {
+    require((_id > 0) && (_id <= todoCounter), "Invalid id");
+    TodoList storage todo = todos[_id];
+    require(todo.status == Status.Pending, "Not pending");
+    require(msg.sender == todo.owner, "Unauthorized caller");
+
+    todo.status = Status.Cancelled;
+
+    emit TodoCancelled(_id);
+}
+
+function updateTodo(uint _id, string memory _newText, uint _newDeadline) external {
+    require((_id > 0) && (_id <= todoCounter), "Invalid id");
+    TodoList storage todo = todos[_id];
+    require(todo.status == Status.Pending, "Not pending");
+    require(msg.sender == todo.owner, "Unauthorized caller");
+    require(bytes(_newText).length > 0, "Empty text");
+    require(_newDeadline > block.timestamp, "Invalid deadline");
+
+    todo.text = _newText;
+    todo.deadline = _newDeadline;
+
+    emit TodoUpdated(_id, _newText, _newDeadline);
+}
+
+function getTodo(uint _id) external view returns(TodoList memory) {
+    require((_id > 0) && (_id <= todoCounter), "Invalid id");
+    return todos[_id];
+}
+
+function getMyTodos() external view returns(TodoList[] memory) {
+    uint[] storage ids = userTodoIds[msg.sender];
+    TodoList[] memory result = new TodoList[](ids.length);
+    
+    for (uint i = 0; i < ids.length; i++) {
+        result[i] = todos[ids[i]];
+    }
+    
+    return result;
+}
+
+function getTodoCount() external view returns(uint) {
+    return todoCounter;
+}
+
+function getUserTodoCount(address _user) external view returns(uint) {
+    return userTodoIds[_user].length;
+}
+
+function checkDefaultedTodos(uint[] calldata _ids) external {
+    for (uint i = 0; i < _ids.length; i++) {
+        uint id = _ids[i];
+        require((id > 0) && (id <= todoCounter), "Invalid id");
+        TodoList storage todo = todos[id];
+        
+        if (todo.status == Status.Pending && block.timestamp > todo.deadline) {
+            todo.status = Status.Defaulted;
+        }
+    }
+}
+
+}
\ No newline at end of file
diff --git a/assignments/todo/hardhat.config.ts b/assignments/todo/hardhat.config.ts
new file mode 100644
index 00000000..1b645c9b
--- /dev/null
+++ b/assignments/todo/hardhat.config.ts
@@ -0,0 +1,44 @@
+import "dotenv/config";
+import hardhatToolboxMochaEthersPlugin from "@nomicfoundation/hardhat-toolbox-mocha-ethers";
+import { configVariable, defineConfig } from "hardhat/config";
+
+export default defineConfig({
+  plugins: [hardhatToolboxMochaEthersPlugin],
+  solidity: {
+    profiles: {
+      default: {
+        version: "0.8.28",
+      },
+      production: {
+        version: "0.8.28",
+        settings: {
+          optimizer: {
+            enabled: true,
+            runs: 200,
+          },
+        },
+      },
+    },
+  },
+  networks: {
+    hardhatMainnet: {
+      type: "edr-simulated",
+      chainType: "l1",
+    },
+    hardhatOp: {
+      type: "edr-simulated",
+      chainType: "op",
+    },
+    sepolia: {
+      type: "http",
+      chainType: "l1",
+      url: configVariable("SEPOLIA_RPC_URL"),
+      accounts: [configVariable("SEPOLIA_PRIVATE_KEY")],
+    },
+  },
+  verify: {
+    etherscan: {
+      apiKey: configVariable("ETHERSCAN_API_KEY"),
+    },
+  },
+});
diff --git a/assignments/todo/ignition/deployments/chain-11155111/artifacts/Todo#Todo.json b/assignments/todo/ignition/deployments/chain-11155111/artifacts/Todo#Todo.json
new file mode 100644
index 00000000..104857e8
--- /dev/null
+++ b/assignments/todo/ignition/deployments/chain-11155111/artifacts/Todo#Todo.json
@@ -0,0 +1,70 @@
+{
+  "_format": "hh3-artifact-1",
+  "contractName": "Todo",
+  "sourceName": "contracts/Todo.sol",
+  "abi": [
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": false,
+          "internalType": "string",
+          "name": "text",
+          "type": "string"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "deadline",
+          "type": "uint256"
+        }
+      ],
+      "name": "TodoCreated",
+      "type": "event"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "string",
+          "name": "_text",
+          "type": "string"
+        },
+        {
+          "internalType": "uint256",
+          "name": "_deadline",
+          "type": "uint256"
+        }
+      ],
+      "name": "createTodo",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "_id",
+          "type": "uint256"
+        }
+      ],
+      "name": "markAsDone",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    }
+  ],
+  "bytecode": "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",
+  "deployedBytecode": "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",
+  "linkReferences": {},
+  "deployedLinkReferences": {},
+  "immutableReferences": {},
+  "inputSourceName": "project/contracts/Todo.sol",
+  "buildInfoId": "solc-0_8_28-f65f8ff8903a412c1854c9b0f7553b2537651194"
+}
\ No newline at end of file
diff --git a/assignments/todo/ignition/deployments/chain-11155111/build-info/solc-0_8_28-f65f8ff8903a412c1854c9b0f7553b2537651194.json b/assignments/todo/ignition/deployments/chain-11155111/build-info/solc-0_8_28-f65f8ff8903a412c1854c9b0f7553b2537651194.json
new file mode 100644
index 00000000..15d25ff5
--- /dev/null
+++ b/assignments/todo/ignition/deployments/chain-11155111/build-info/solc-0_8_28-f65f8ff8903a412c1854c9b0f7553b2537651194.json
@@ -0,0 +1,39 @@
+{
+  "_format": "hh3-sol-build-info-1",
+  "id": "solc-0_8_28-f65f8ff8903a412c1854c9b0f7553b2537651194",
+  "solcVersion": "0.8.28",
+  "solcLongVersion": "0.8.28+commit.7893614a",
+  "userSourceNameMap": {
+    "contracts/Todo.sol": "project/contracts/Todo.sol"
+  },
+  "input": {
+    "language": "Solidity",
+    "settings": {
+      "evmVersion": "cancun",
+      "optimizer": {
+        "enabled": true,
+        "runs": 200
+      },
+      "outputSelection": {
+        "*": {
+          "": [
+            "ast"
+          ],
+          "*": [
+            "abi",
+            "evm.bytecode",
+            "evm.deployedBytecode",
+            "evm.methodIdentifiers",
+            "metadata"
+          ]
+        }
+      },
+      "remappings": []
+    },
+    "sources": {
+      "project/contracts/Todo.sol": {
+        "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.28;\n\n\n\ncontract Bank {\n\nuint public totalBalance;\nuint interest;\naddress owner;\n\nmapping(address => uint) public balances;\n\nmodifier onlyOwner{\n    require(msg.sender == owner);\n    _;\n}\n\n event depositSuccessful(string sent, uint amount);\n\nconstructor(uint _interest){\n    interest = _interest; \n    owner = msg.sender;\n}\n\nfunction re() public view returns(address){\n    return address(this);\n}\n\nfunction deposit() external payable returns(bool){\n    require(msg.value > 0, \"Cannot deposit Zero\");\n    balances[msg.sender] += msg.value;\n\n    emit depositSuccessful(\"Sent\", msg.value);\n    return true;\n} \n\nfunction withdraw(uint _amount) external  {\n    require(balances[msg.sender] >= _amount, \"Insufficient funds\");\n    require(address(this).balance >= _amount, \"Contract cannot pay\");\n\n    balances[msg.sender]-= _amount;\n    (bool success,) = msg.sender.call{value: _amount}(\" \");\n    require(success, \"transcation failed\");\n\n    \n}\n\nfunction drain(address recepient) public onlyOwner{\n    uint amount =  address(this).balance;\n\n    (bool success,) = recepient.call{value: amount}(\" \");\n    require(success, \"transcation failed\");\n}\n\n// receive() external payable {}\n\n\n}\n\ncontract Todo{\n    uint256 todoCounter;\n\n    enum Status{\n        Pending,\n        Done,\n        Cancelled,\n        Defaulted\n    }\n\n    struct TodoList{\n        uint id;\n        address owner;\n        string text;\n        Status status;\n        uint256 deadline;\n    }\n\n    mapping(uint => TodoList) todos;\n\n    event TodoCreated(string text, uint deadline);\n\n\n\nfunction createTodo(string memory _text, uint _deadline) external returns(uint){\n    require(bytes(_text).length > 0, \"Empty text\");\n    require(_deadline > (block.timestamp + 600), \"Invalid deadline\");\n    require(msg.sender != address(0), \"Zero address\");\n\n    todoCounter++;\n\n    todos[todoCounter] = TodoList(todoCounter, msg.sender, _text, Status.Pending, _deadline);\n\n    emit TodoCreated(_text, _deadline);\n    return todoCounter;    \n}\n\nfunction markAsDone(uint _id) external {\n    require((_id > 0) && (_id <= todoCounter) , 'invalid id');\n    TodoList storage todo = todos[_id];\n    require(todo.status == Status.Pending, \"Not pending\");\n    require(msg.sender == todo.owner, \"unauthorized Caller\");\n\n    if(block.timestamp > todo.deadline){\n        todo.status = Status.Defaulted;\n    }\n    else{\n    todo.status = Status.Done;\n    }\n\n}\n\n}"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/assignments/todo/ignition/deployments/chain-11155111/deployed_addresses.json b/assignments/todo/ignition/deployments/chain-11155111/deployed_addresses.json
new file mode 100644
index 00000000..8edb6916
--- /dev/null
+++ b/assignments/todo/ignition/deployments/chain-11155111/deployed_addresses.json
@@ -0,0 +1,3 @@
+{
+  "Todo#Todo": "0x50b86D16380e8046b127e2dDED3D31aeF51f82fE"
+}
\ No newline at end of file
diff --git a/assignments/todo/ignition/deployments/chain-11155111/journal.jsonl b/assignments/todo/ignition/deployments/chain-11155111/journal.jsonl
new file mode 100644
index 00000000..3d5666bd
--- /dev/null
+++ b/assignments/todo/ignition/deployments/chain-11155111/journal.jsonl
@@ -0,0 +1,8 @@
+
+{"chainId":11155111,"type":"DEPLOYMENT_INITIALIZE"}
+{"artifactId":"Todo#Todo","constructorArgs":[],"contractName":"Todo","dependencies":[],"from":"0xa2f4cf70b1952b4a8bfd24cb90d3633b6cf57c36","futureId":"Todo#Todo","futureType":"NAMED_ARTIFACT_CONTRACT_DEPLOYMENT","libraries":{},"strategy":"basic","strategyConfig":{},"type":"DEPLOYMENT_EXECUTION_STATE_INITIALIZE","value":{"_kind":"bigint","value":"0"}}
+{"futureId":"Todo#Todo","networkInteraction":{"data":"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","id":1,"type":"ONCHAIN_INTERACTION","value":{"_kind":"bigint","value":"0"}},"type":"NETWORK_INTERACTION_REQUEST"}
+{"futureId":"Todo#Todo","networkInteractionId":1,"nonce":1,"type":"TRANSACTION_PREPARE_SEND"}
+{"futureId":"Todo#Todo","networkInteractionId":1,"nonce":1,"transaction":{"fees":{"maxFeePerGas":{"_kind":"bigint","value":"2168509975"},"maxPriorityFeePerGas":{"_kind":"bigint","value":"1439189"}},"hash":"0x5add6193450acf5861e9b001123d090e15b3492cbaefead884cef5bfa481fcc0"},"type":"TRANSACTION_SEND"}
+{"futureId":"Todo#Todo","hash":"0x5add6193450acf5861e9b001123d090e15b3492cbaefead884cef5bfa481fcc0","networkInteractionId":1,"receipt":{"blockHash":"0x1c8fd973dae86a801afe12f5781d3a2741debac3f811f246bf553b6e3f8d0c55","blockNumber":10237828,"contractAddress":"0x50b86D16380e8046b127e2dDED3D31aeF51f82fE","logs":[],"status":"SUCCESS"},"type":"TRANSACTION_CONFIRM"}
+{"futureId":"Todo#Todo","result":{"address":"0x50b86D16380e8046b127e2dDED3D31aeF51f82fE","type":"SUCCESS"},"type":"DEPLOYMENT_EXECUTION_STATE_COMPLETE"}
\ No newline at end of file
diff --git a/assignments/todo/ignition/modules/Todo.ts b/assignments/todo/ignition/modules/Todo.ts
new file mode 100644
index 00000000..29efcd8c
--- /dev/null
+++ b/assignments/todo/ignition/modules/Todo.ts
@@ -0,0 +1,9 @@
+import {buildModule} from "@nomicfoundation/hardhat-ignition/modules";
+
+export default buildModule("Todo", (m) => {
+    const todo = m.contract("Todo");
+
+    return {
+        todo,
+    };
+})
\ No newline at end of file
diff --git a/assignments/todo/package.json b/assignments/todo/package.json
new file mode 100644
index 00000000..508a8d12
--- /dev/null
+++ b/assignments/todo/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "todo",
+  "version": "1.0.0",
+  "type": "module",
+  "devDependencies": {
+    "@nomicfoundation/hardhat-ethers": "^4.0.4",
+    "@nomicfoundation/hardhat-ignition": "^3.0.7",
+    "@nomicfoundation/hardhat-toolbox-mocha-ethers": "^3.0.2",
+    "@types/chai": "^4.3.20",
+    "@types/chai-as-promised": "^8.0.2",
+    "@types/mocha": "^10.0.10",
+    "@types/node": "^22.19.8",
+    "chai": "^5.3.3",
+    "ethers": "^6.16.0",
+    "forge-std": "github:foundry-rs/forge-std#v1.9.4",
+    "hardhat": "^3.1.6",
+    "mocha": "^11.7.5",
+    "typescript": "~5.8.0"
+  },
+  "dependencies": {
+    "dotenv": "^17.2.4"
+  }
+}
diff --git a/assignments/todo/scripts/send-op-tx.ts b/assignments/todo/scripts/send-op-tx.ts
new file mode 100644
index 00000000..c10a2360
--- /dev/null
+++ b/assignments/todo/scripts/send-op-tx.ts
@@ -0,0 +1,22 @@
+import { network } from "hardhat";
+
+const { ethers } = await network.connect({
+  network: "hardhatOp",
+  chainType: "op",
+});
+
+console.log("Sending transaction using the OP chain type");
+
+const [sender] = await ethers.getSigners();
+
+console.log("Sending 1 wei from", sender.address, "to itself");
+
+console.log("Sending L2 transaction");
+const tx = await sender.sendTransaction({
+  to: sender.address,
+  value: 1n,
+});
+
+await tx.wait();
+
+console.log("Transaction sent successfully");
diff --git a/assignments/todo/test/Counter.ts b/assignments/todo/test/Counter.ts
new file mode 100644
index 00000000..f8c38986
--- /dev/null
+++ b/assignments/todo/test/Counter.ts
@@ -0,0 +1,36 @@
+import { expect } from "chai";
+import { network } from "hardhat";
+
+const { ethers } = await network.connect();
+
+describe("Counter", function () {
+  it("Should emit the Increment event when calling the inc() function", async function () {
+    const counter = await ethers.deployContract("Counter");
+
+    await expect(counter.inc()).to.emit(counter, "Increment").withArgs(1n);
+  });
+
+  it("The sum of the Increment events should match the current value", async function () {
+    const counter = await ethers.deployContract("Counter");
+    const deploymentBlockNumber = await ethers.provider.getBlockNumber();
+
+    // run a series of increments
+    for (let i = 1; i <= 10; i++) {
+      await counter.incBy(i);
+    }
+
+    const events = await counter.queryFilter(
+      counter.filters.Increment(),
+      deploymentBlockNumber,
+      "latest",
+    );
+
+    // check that the aggregated events match the current value
+    let total = 0n;
+    for (const event of events) {
+      total += event.args.by;
+    }
+
+    expect(await counter.x()).to.equal(total);
+  });
+});
diff --git a/assignments/todo/tsconfig.json b/assignments/todo/tsconfig.json
new file mode 100644
index 00000000..9b1380cc
--- /dev/null
+++ b/assignments/todo/tsconfig.json
@@ -0,0 +1,13 @@
+/* Based on https://github.com/tsconfig/bases/blob/501da2bcd640cf95c95805783e1012b992338f28/bases/node22.json */
+{
+  "compilerOptions": {
+    "lib": ["es2023"],
+    "module": "node16",
+    "target": "es2022",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "moduleResolution": "node16",
+    "outDir": "dist"
+  }
+}