React Native - Parsing Server Error Response gives "missing trailer"

[anmho]

Hi all, I am currently working off of a repo inspired by the react-native example in this repo. Right now, I'm struggling to get errors to be parsed correctly using the React-Native client and a Go server.

When an error is returned from the server, the React Native client custom transport throws a missing trailers issue. curl, grpcurl, and Postman each handle and parse the error correctly.

Fields of the error thrown:

Cause: missing trailer
Code: 2
Details: 
FindDetails: function findDetails(a0) { [bytecode] }
Message: [unknown] missing trailer
Metadata: [object Object]
Name: ConnectError
RawMessage: missing trailer

This seems to be an issue with the provided custom transport implementation since thats where the error is thrown.

My custom-transport.ts is exactly as shown in the React Native example.

Reproduce:

1. Follow setup steps in: https://connectrpc.com/docs/web/supported-browsers-and-frameworks/#react-native and https://github.com/connectrpc/examples-es/blob/main/react-native/README.md
2. Call any RPC that returns an error to the caller.
3. Client will throw an error with the message "missing trailer"

Example repo:
Clone this repository
Run make gen
Run npm run ios in /react-native
Run Dev Server using make watch in the project root.