chore: added message types to PubSub Service

packages/hoppscotch-backend/src/pubsub/pubsub.service.ts

@@ -4,6 +4,7 @@ import { default as Redis, RedisOptions } from 'ioredis';
 
 import { RedisPubSub } from 'graphql-redis-subscriptions';
 import { PubSub as LocalPubSub } from 'graphql-subscriptions';
+import { MessageType } from './subscriptionTopicsDefs';
 
 /**
  * RedisPubSub uses JSON parsing for back and forth conversion, which loses Date objects, hence this reviver brings them back
@@ -70,7 +71,10 @@ export class PubSubService implements OnModuleInit {
     return this.pubsub.asyncIterator(topic, options);
   }
 
-  async publish(topic: string, payload: any) {
+  async publish<T extends keyof MessageType>(
+    topic: T,
+    payload: MessageType[T],
+  ) {
     await this.pubsub.publish(topic, payload);
   }
 }