Fixes according to review

src/async/consumers/block.consumer.ts

@@ -10,10 +10,6 @@ import { BlockEntity, TransactionEntity } from '@app/database';
 import { BlockService, ChainService, TransactionService, ValidatorService } from '@app/services';
 import { AssetSymbol, getAddressesRelatedToTransaction, isBeam, NotificationChannels, NotificationEvents, QueueJobs, QueuePriority, Queues } from '@app/utils';
 
-(BigInt.prototype as any).toJSON = function () {
-    return this.toString();
-};
-
 @Processor(Queues.BLOCKS)
 export class BlockConsumer {
     private readonly _logger: Logger = new Logger(BlockConsumer.name);

src/utils/index.ts

@@ -14,6 +14,10 @@ export * from './transactions';
 export * from './validation';
 export * from './validators';
 
+(BigInt.prototype as any).toJSON = function () {
+    return this.toString();
+};
+
 export const sleep = async (ms: number): Promise<void> => {
     return new Promise((resolve) => setTimeout(resolve, ms));
 };