fix

packages/misskey-js/generator/src/generator.ts

@@ -290,12 +290,6 @@ async function generateApiClientJSDoc(
 		'',
 		'	catch<TResult = never>(onrejected?: ((reason: TError) => TResult | PromiseLike<TResult>) | undefined | null): Promise<TSuccess | TResult>;',
 		'}',
-		'',
-		'class ErrPromise<TSuccess, TError> extends Promise<TSuccess> implements IErrPromise<TSuccess, TError> {',
-		'	constructor(executor: (resolve: (value: TSuccess | PromiseLike<TSuccess>) => void, reject: (reason: TError) => void) => void) {',
-		'		super(executor);',
-		'	}',
-		'}',
 	);
 	endpointOutputLine.push('');
 
@@ -312,7 +306,7 @@ async function generateApiClientJSDoc(
 			'      endpoint: E,',
 			'      params: P,',
 			'      credential?: string | null,',
-			'    ): ErrPromise<SwitchCaseResponseType<E, P>, RE>;',
+			'    ): IErrPromise<SwitchCaseResponseType<E, P>, RE>;',
 		);
 
 		if (i < endpoints.length - 1) {

packages/misskey-js/src/api.ts

@@ -65,8 +65,8 @@ export class APIClient {
 		endpoint: E,
 		params: P = {} as P,
 		credential?: string | null,
-	): ErrPromise<SwitchCaseResponseType<E, P>, RE> {
-		return new Promise((resolve, reject) => {
+	): IErrPromise<SwitchCaseResponseType<E, P>, RE> {
+		return new ErrPromise((resolve, reject) => {
 			this.fetch(`${this.origin}/api/${endpoint}`, {
 				method: 'POST',
 				body: JSON.stringify({