Method serializeError

integration/microservices/src/app.controller.ts:82–92

(
    @Query('client') query: 'custom' | 'standard' = 'standard',
    @Body() body: Record<string, any>,
  )

  @Post('error')
  @HttpCode(200)
  serializeError(
    @Query('client') query: 'custom' | 'standard' = 'standard',
    @Body() body: Record<string, any>,
  ): Observable<boolean> {
    const client = query === 'custom' ? this.customClient : this.client;
    return client.send({ cmd: 'err' }, {}).pipe(
      catchError(err => {
        return of(err instanceof RpcException);
      }),
    );
  }

  @MessagePattern({ cmd: 'sum' })
  sum(data: number[]): number {