perf: parallelize subscribe/unsubscribe calls in chainlink

magicblock-chainlink/src/chainlink/fetch_cloner/ata_projection.rs

@@ -1,9 +1,7 @@
-use std::sync::atomic::AtomicU16;
-
+use dlp::state::DelegationRecord;
+use futures_util::future::join_all;
 use magicblock_accounts_db::traits::AccountsBank;
-use magicblock_core::{
-    logger::log_trace_warn, token_programs::try_derive_eata_address_and_bump,
-};
+use magicblock_core::token_programs::try_derive_eata_address_and_bump;
 use magicblock_metrics::metrics;
 use solana_account::AccountSharedData;
 use solana_pubkey::Pubkey;
@@ -13,7 +11,9 @@ use tracing::*;
 use super::{delegation, types::AccountWithCompanion, FetchCloner};
 use crate::{
     cloner::{AccountCloneRequest, Cloner},
-    remote_account_provider::{ChainPubsubClient, ChainRpcClient},
+    remote_account_provider::{
+        ChainPubsubClient, ChainRpcClient, ResolvedAccountSharedData,
+    },
 };
 
 /// Resolves ATAs with eATA projection.
@@ -45,35 +45,18 @@ where
     let mut accounts_to_clone = vec![];
     let mut ata_join_set = JoinSet::new();
 
-    // Subscribe first so subsequent fetches are kept up-to-date
+    // Collect all pubkeys to subscribe to and spawn fetch tasks
+    let mut pubkeys_to_subscribe = vec![];
+
     for (ata_pubkey, _, ata_info, ata_account_slot) in &atas {
-        if let Err(err) = this.subscribe_to_account(ata_pubkey).await {
-            static ATA_SUBSCRIPTION_FAILURE_COUNT: AtomicU16 =
-                AtomicU16::new(0);
-            log_trace_warn(
-                "Failed to subscribe to ATA",
-                "Failed to subscribe to ATAs",
-                &ata_pubkey,
-                &err,
-                1000,
-                &ATA_SUBSCRIPTION_FAILURE_COUNT,
-            );
-        }
+        // Collect ATA pubkey for subscription
+        pubkeys_to_subscribe.push(*ata_pubkey);
+
         if let Some((eata, _)) =
             try_derive_eata_address_and_bump(&ata_info.owner, &ata_info.mint)
         {
-            if let Err(err) = this.subscribe_to_account(&eata).await {
-                static EATA_SUBSCRIPTION_FAILURE_COUNT: AtomicU16 =
-                    AtomicU16::new(0);
-                log_trace_warn(
-                    "Failed to subscribe to derived eATA",
-                    "Failed to subscribe to derived eATAs",
-                    &eata,
-                    &err,
-                    1000,
-                    &EATA_SUBSCRIPTION_FAILURE_COUNT,
-                );
-            }
+            // Collect eATA pubkey for subscription
+            pubkeys_to_subscribe.push(eata);
 
             let effective_slot = if let Some(min_slot) = min_context_slot {
                 min_slot.max(*ata_account_slot)
@@ -90,8 +73,38 @@ where
         }
     }
 
+    // Subscribe to all ATA and eATA accounts in parallel
+    let subscription_results = join_all(
+        pubkeys_to_subscribe
+            .iter()
+            .map(|pk| this.subscribe_to_account(pk)),
+    )
+    .await;
+
+    for (pubkey, result) in
+        pubkeys_to_subscribe.iter().zip(subscription_results)
+    {
+        if let Err(err) = result {
+            warn!(
+                pubkey = %pubkey,
+                err = ?err,
+                "Failed to subscribe to ATA/eATA account"
+            );
+        }
+    }
+
     let ata_results = ata_join_set.join_all().await;
 
+    // Phase 1: Collect successfully resolved ATAs
+    struct AtaResolutionInput {
+        ata_pubkey: Pubkey,
+        ata_account: ResolvedAccountSharedData,
+        eata_pubkey: Pubkey,
+        eata_shared: Option<AccountSharedData>,
+    }
+
+    let mut ata_inputs: Vec<AtaResolutionInput> = Vec::new();
+
     for result in ata_results {
         let AccountWithCompanion {
             pubkey: ata_pubkey,
@@ -110,31 +123,48 @@ where
             }
         };
 
-        // Defaults: clone the ATA as-is
-        let mut account_to_clone = ata_account.account_shared_data_cloned();
-        let mut commit_frequency_ms = None;
-        let mut delegated_to_other = None;
-
-        // If there's an eATA, try to use it + delegation record to project the ATA
-        if let Some(eata_acc) = maybe_eata_account {
-            let eata_shared = eata_acc.account_shared_data_cloned();
+        let eata_shared =
+            maybe_eata_account.map(|e| e.account_shared_data_cloned());
+        ata_inputs.push(AtaResolutionInput {
+            ata_pubkey,
+            ata_account,
+            eata_pubkey,
+            eata_shared,
+        });
+    }
 
-            if let Some(deleg) = delegation::fetch_and_parse_delegation_record(
+    // Phase 2: Fetch delegation records in parallel for all eATAs
+    let deleg_futures = ata_inputs.iter().filter_map(|input| {
+        input.eata_shared.as_ref().map(|_| {
+            delegation::fetch_and_parse_delegation_record(
                 this,
-                eata_pubkey,
+                input.eata_pubkey,
                 this.remote_account_provider.chain_slot(),
                 fetch_origin,
             )
-            .await
-            {
+        })
+    });
+    let deleg_results: Vec<Option<DelegationRecord>> =
+        join_all(deleg_futures).await;
+
+    // Phase 3: Combine results
+    let mut deleg_iter = deleg_results.into_iter();
+    for input in ata_inputs {
+        let mut account_to_clone =
+            input.ata_account.account_shared_data_cloned();
+        let mut commit_frequency_ms = None;
+        let mut delegated_to_other = None;
+
+        if let Some(eata_shared) = &input.eata_shared {
+            if let Some(Some(deleg)) = deleg_iter.next() {
                 delegated_to_other =
                     delegation::get_delegated_to_other(this, &deleg);
                 commit_frequency_ms = Some(deleg.commit_frequency_ms);
 
                 if let Some(projected_ata) = this
                     .maybe_project_delegated_ata_from_eata(
-                        ata_account.account_shared_data(),
-                        &eata_shared,
+                        input.ata_account.account_shared_data(),
+                        eata_shared,
                         &deleg,
                     )
                 {
@@ -144,7 +174,7 @@ where
         }
 
         accounts_to_clone.push(AccountCloneRequest {
-            pubkey: ata_pubkey,
+            pubkey: input.ata_pubkey,
             account: account_to_clone,
             commit_frequency_ms,
             delegated_to_other,