From 9b60c8ba7a33f641a621f4e8757d5bab4444eaa5 Mon Sep 17 00:00:00 2001
From: danielailie <danielailie12@gmail.com>
Date: Wed, 17 Jan 2024 22:00:49 +0200
Subject: [PATCH] Update token decoding for multi transfer

---
 .../blockchain-events/nft-events.service.ts   | 28 ++++++++++---------
 .../entities/auction/transfer.event.topics.ts | 28 +++++++++++++++++++
 .../entities/auction/transfer.event.ts        | 15 +++++++++-
 3 files changed, 57 insertions(+), 14 deletions(-)

diff --git a/src/modules/rabbitmq/blockchain-events/nft-events.service.ts b/src/modules/rabbitmq/blockchain-events/nft-events.service.ts
index 030bdd416..58d0b05eb 100644
--- a/src/modules/rabbitmq/blockchain-events/nft-events.service.ts
+++ b/src/modules/rabbitmq/blockchain-events/nft-events.service.ts
@@ -4,7 +4,7 @@ import { NftEventEnum, NftTypeEnum } from 'src/modules/assets/models';
 import { CacheEventsPublisherService } from '../cache-invalidation/cache-invalidation-publisher/change-events-publisher.service';
 import { CacheEventTypeEnum, ChangedEvent } from '../cache-invalidation/events/changed.event';
 import { MintEvent } from '../entities/auction/mint.event';
-import { TransferEvent } from '../entities/auction/transfer.event';
+import { MultiTransferEvent, TransferEvent } from '../entities/auction/transfer.event';
 import { FeedEventsSenderService } from './feed-events.service';
 import { BurnEvent } from '../entities/auction/burn.event';
 
@@ -55,21 +55,23 @@ export class NftEventsService {
           break;
 
         case NftEventEnum.MultiESDTNFTTransfer:
-          const multiTransferEvent = new TransferEvent(event);
+          const multiTransferEvent = new MultiTransferEvent(event);
           multiTransferEvent.getAddress();
           const multiTransferTopics = multiTransferEvent.getTopics();
-          const collectionDetails = await this.mxApiService.getCollectionByIdentifierForQuery(
-            multiTransferTopics.collection,
-            'fields=name,type',
-          );
-          if (collectionDetails?.type === NftTypeEnum.NonFungibleESDT || collectionDetails?.type === NftTypeEnum.SemiFungibleESDT) {
-            this.triggerCacheInvalidationWithOwner(
-              `${multiTransferTopics.collection}-${multiTransferTopics.nonce}`,
-              CacheEventTypeEnum.OwnerChanged,
-              multiTransferEvent.getAddress(),
-              multiTransferTopics.receiverAddress.toString(),
-            );
+          for (const pair of multiTransferTopics.pairs) {
+            if (pair.nonce !== '') {
+              const collectionDetails = await this.mxApiService.getCollectionByIdentifierForQuery(pair.collection, 'fields=name,type');
+              if (collectionDetails?.type === NftTypeEnum.NonFungibleESDT || collectionDetails?.type === NftTypeEnum.SemiFungibleESDT) {
+                this.triggerCacheInvalidationWithOwner(
+                  `${pair.collection}-${pair.nonce}`,
+                  CacheEventTypeEnum.OwnerChanged,
+                  multiTransferEvent.getAddress(),
+                  multiTransferTopics.receiverAddress.toString(),
+                );
+              }
+            }
           }
+
           break;
       }
     }
diff --git a/src/modules/rabbitmq/entities/auction/transfer.event.topics.ts b/src/modules/rabbitmq/entities/auction/transfer.event.topics.ts
index 80f20e063..ec7e5b5a1 100644
--- a/src/modules/rabbitmq/entities/auction/transfer.event.topics.ts
+++ b/src/modules/rabbitmq/entities/auction/transfer.event.topics.ts
@@ -21,3 +21,31 @@ export class TransferEventsTopics {
     };
   }
 }
+
+export class MultiTransferEventsTopics {
+  private receiverAddress: Address;
+  private pairs: any[] = [];
+
+  constructor(rawTopics: string[]) {
+    console.log({ rawTopics });
+    for (let index = 0; index < rawTopics.length - 1; index += 3) {
+      console.log({ index });
+      this.pairs.push({
+        collection: BinaryUtils.base64Decode(rawTopics[index]),
+        nonce: BinaryUtils.base64ToHex(rawTopics[index + 1]),
+        value: Buffer.from(rawTopics[index + 2], 'base64')
+          .toString('hex')
+          .hexBigNumberToString(),
+      });
+    }
+
+    this.receiverAddress = new Address(Buffer.from(rawTopics[rawTopics.length - 1], 'base64'));
+  }
+
+  toPlainObject() {
+    return {
+      pairs: this.pairs,
+      receiverAddress: this.receiverAddress,
+    };
+  }
+}
diff --git a/src/modules/rabbitmq/entities/auction/transfer.event.ts b/src/modules/rabbitmq/entities/auction/transfer.event.ts
index f835cfbb9..18f26db6b 100644
--- a/src/modules/rabbitmq/entities/auction/transfer.event.ts
+++ b/src/modules/rabbitmq/entities/auction/transfer.event.ts
@@ -1,5 +1,5 @@
 import { GenericEvent } from '../generic.event';
-import { TransferEventsTopics } from './transfer.event.topics';
+import { MultiTransferEventsTopics as MultiTransferEventTopics, TransferEventsTopics } from './transfer.event.topics';
 
 export class TransferEvent extends GenericEvent {
   private decodedTopics: TransferEventsTopics;
@@ -13,3 +13,16 @@ export class TransferEvent extends GenericEvent {
     return this.decodedTopics.toPlainObject();
   }
 }
+
+export class MultiTransferEvent extends GenericEvent {
+  private decodedTopics: MultiTransferEventTopics;
+
+  constructor(init?: Partial<GenericEvent>) {
+    super(init);
+    this.decodedTopics = new MultiTransferEventTopics(this.topics);
+  }
+
+  getTopics() {
+    return this.decodedTopics.toPlainObject();
+  }
+}