types(voice): bring back typed events (#8109)

packages/voice/src/VoiceConnection.ts

@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/method-signature-style */
 import { EventEmitter } from 'node:events';
 import type { GatewayVoiceServerUpdateDispatchData, GatewayVoiceStateUpdateDispatchData } from 'discord-api-types/v10';
 import type { CreateVoiceConnectionOptions } from '.';
@@ -161,6 +162,32 @@ export type VoiceConnectionState =
 	| VoiceConnectionReadyState
 	| VoiceConnectionDestroyedState;
 
+export interface VoiceConnection extends EventEmitter {
+	/**
+	 * Emitted when there is an error emitted from the voice connection
+	 * @event
+	 */
+	on(event: 'error', listener: (error: Error) => void): this;
+	/**
+	 * Emitted debugging information about the voice connection
+	 * @event
+	 */
+	on(event: 'debug', listener: (message: string) => void): this;
+	/**
+	 * Emitted when the state of the voice connection changes
+	 * @event
+	 */
+	on(event: 'stateChange', listener: (oldState: VoiceConnectionState, newState: VoiceConnectionState) => void): this;
+	/**
+	 * Emitted when the state of the voice connection changes to a specific status
+	 * @event
+	 */
+	on<T extends VoiceConnectionStatus>(
+		event: T,
+		listener: (oldState: VoiceConnectionState, newState: VoiceConnectionState & { status: T }) => void,
+	): this;
+}
+
 /**
  * A connection to the voice server of a Guild, can be used to play audio in voice channels.
  */