using typeguards and removed useless logging

src/types/ws-events/failed-topic-subscription-confirmation.ts

@@ -0,0 +1,6 @@
+import { WebsocketTopicSubscriptionConfirmationEvent } from './topic-subscription-confirmation';
+
+export interface WebsocketFailedTopicSubscriptionConfirmationEvent
+  extends WebsocketTopicSubscriptionConfirmationEvent {
+  success: false;
+}

src/types/ws-events/succeeded-topic-subscription-confirmation.ts

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+import { WebsocketTopicSubscriptionConfirmationEvent } from './topic-subscription-confirmation';
+
+export interface WebsocketSucceededTopicSubscriptionConfirmationEvent
+  extends WebsocketTopicSubscriptionConfirmationEvent {
+  success: true;
+}

src/types/ws-events/topic-subscription-confirmation.ts

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+export interface WebsocketTopicSubscriptionConfirmationEvent {
+  op: 'subscribe';
+  req_id: string;
+  conn_id: string;
+  ret_msg: string;
+  success: boolean;
+}