Use transport-specific `RpcException` and a global RPC exception filter; an HTTP `HttpException` does not preserve the intended error contract over TCP/RPC. ```ts throw new RpcException({ code: 'ORDER_NOT_FOUND', message: 'Order not found' }); ``` The filter should map the error to a stable microservice response and log it with a correlation ID. Configure `ValidationPipe({ transform: true })` in the `MicroserviceOptions` bootstrap, not only in the HTTP app. Keep business errors transport-neut...
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Use transport-specific `RpcException` and a global RPC exception filter; an HTTP `HttpException` does not preserve the intended error contract over TCP/RPC.
```ts
throw new RpcException({ code: 'ORDER_NOT_FOUND', message: 'Order not found' });
```
The filter should map the error to a stable microservice response and log it with a correlation ID. Configure `ValidationPipe({ transform: true })` in the `MicroserviceOptions` bootstrap, not only in the HTTP app. Keep business errors transport-neutral and translate them at the adapter boundary.
