refactor(pxe): batch tagged private log queries across all secrets

yarn-project/pxe/src/contract_function_simulator/oracle/private_execution.test.ts

@@ -325,7 +325,7 @@ describe('Private Execution test suite', () => {
     // on the input.
     aztecNode.getPrivateLogsByTags.mockImplementation((tags: SiloedTag[]) => Promise.resolve(tags.map(() => [])));
 
-    // Mock getL2Tips and getBlockHeader for loadPrivateLogsForSenderRecipientPair
+    // Mock getL2Tips and getBlockHeader for syncTaggedPrivateLogs
     l2TipsStore.getL2Tips.mockResolvedValue(makeL2Tips(anchorBlockHeader.globalVariables.blockNumber));
 
     // TODO: refactor. Maybe it's worth stubbing a key store

yarn-project/pxe/src/logs/log_service.ts

@@ -14,7 +14,7 @@ import type { SenderAddressBookStore } from '../storage/tagging_store/sender_add
 import {
   getAllPrivateLogsByTags,
   getAllPublicLogsByTagsFromContract,
-  loadPrivateLogsForSenderRecipientPair,
+  syncTaggedPrivateLogs,
 } from '../tagging/index.js';
 
 export class LogService {
@@ -116,37 +116,23 @@ export class LogService {
   public async fetchTaggedLogs(contractAddress: AztecAddress, recipient: AztecAddress): Promise<PendingTaggedLog[]> {
     this.log.verbose(`Fetching tagged logs for ${contractAddress.toString()}`);
 
-    // We only load logs from block up to and including the anchor block number
-    const anchorBlockNumber = this.anchorBlockHeader.getBlockNumber();
-    const anchorBlockHash = await this.anchorBlockHeader.hash();
-
     const l2Tips = await this.l2TipsStore.getL2Tips();
-    const currentTimestamp = this.anchorBlockHeader.globalVariables.timestamp;
     // Get all secrets for this recipient (one per sender)
     const secrets = await this.#getSecretsForSenders(contractAddress, recipient);
 
-    // Load logs for all sender-recipient pairs in parallel
-    const logArrays = await Promise.all(
-      secrets.map(secret =>
-        loadPrivateLogsForSenderRecipientPair(
-          secret,
-          this.aztecNode,
-          this.recipientTaggingStore,
-          anchorBlockNumber,
-          anchorBlockHash,
-          currentTimestamp,
-          l2Tips.finalized.block.number,
-          this.jobId,
-        ),
-      ),
+    const logs = await syncTaggedPrivateLogs(
+      secrets,
+      this.aztecNode,
+      this.recipientTaggingStore,
+      this.anchorBlockHeader,
+      l2Tips.finalized.block.number,
+      this.jobId,
     );
 
-    return logArrays
-      .flat()
-      .map(
-        scopedLog =>
-          new PendingTaggedLog(scopedLog.logData, scopedLog.txHash, scopedLog.noteHashes, scopedLog.firstNullifier),
-      );
+    return logs.map(
+      scopedLog =>
+        new PendingTaggedLog(scopedLog.logData, scopedLog.txHash, scopedLog.noteHashes, scopedLog.firstNullifier),
+    );
   }
 
   async #getSecretsForSenders(

yarn-project/pxe/src/tagging/get_all_logs_by_tags.ts

@@ -39,6 +39,10 @@ async function getAllPagesInBatches<Tag, T>(
   tags: Tag[],
   fetchAllPagesForBatch: (batch: Tag[]) => Promise<T[][]>,
 ): Promise<T[][]> {
+  if (tags.length === 0) {
+    return [];
+  }
+
   if (tags.length <= MAX_RPC_LEN) {
     return fetchAllPagesForBatch(tags);
   }

yarn-project/pxe/src/tagging/index.ts

@@ -4,12 +4,12 @@
  * The objective of the sender sync algorithm is to determine which tags have already been used by a sender, thereby
  * deciding which tag should be used next.
  *
- * The objective of the recipient sync algorithm is to load and process the corresponding logs.
+ * The objective of the recipient sync algorithm is to fetch and sync the corresponding logs.
  *
  * @module tagging
  */
 
-export { loadPrivateLogsForSenderRecipientPair } from './recipient_sync/load_private_logs_for_sender_recipient_pair.js';
+export { syncTaggedPrivateLogs } from './recipient_sync/sync_tagged_private_logs.js';
 export { syncSenderTaggingIndexes } from './sender_sync/sync_sender_tagging_indexes.js';
 export { UNFINALIZED_TAGGING_INDEXES_WINDOW_LEN } from './constants.js';
 export { getAllPrivateLogsByTags, getAllPublicLogsByTagsFromContract } from './get_all_logs_by_tags.js';