bug: no way to specify error meta

Provide environment information

System: OS: macOS 12.4 CPU: (8) arm64 Apple M1 Pro Memory: 97.84 MB / 16.00 GB Shell: 5.8.1 - /bin/zsh Binaries: Node: 18.7.0 - /opt/homebrew/bin/node npm: 8.15.0 - /opt/homebrew/bin/npm Browsers: Chrome: 105.0.5195.102 Firefox: 104.0.1 Safari: 15.5

Describe the bug

We want to be able to get custom error meta objects. At the moment it doesn’t seem possible.

// Invalid phone number
  if (body.status === '3') {
    throw new TRPCError({
      code: 'BAD_REQUEST',
      message: 'Bad phone number',
      cause: 'invalid-number',
    });
  }

We need to read ‘cause’ as message is a user friendly coding error. It would also be nice to pass meta JSON objects; sometimes error messages need to contain more data.

There seems to be no way to pass though that data.

{ [TRPCClientError: Your request is incomplete and missing the mandatory parameter: number] [cause]: undefined, originalError: undefined, shape: {
    message: 'Your request is incomplete and missing the mandatory parameter: number',
    code: -32600,
    data: {
      code: 'BAD_REQUEST',
      httpStatus: 400,
      stack: ''
      path: 'user.enter-phone-number'
    }
  }, data: {
    code: 'BAD_REQUEST',
    httpStatus: 400,
    stack: ''
    path: 'user.enter-phone-number'
  }, isDone: false, name: 'TRPCClientError' }

To reproduce

^^

Additional information

No response

👨‍👧‍👦 Contributing

• 🙋‍♂️ Yes, I’d be down to file a PR fixing this bug!

[KATT]

This should also work

const router = trpc.router<Context>()
  .formatError(({ shape, error }) => {
    return {
      ...shape,
      data: {
        ...shape.data,
        cause: error.cause,
      },
    };
  })

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