code: 32603, message types.Coin is neither a v1 or v2 Message

[anilcse]

🐛 Bug Report

Gateway integration is failing with following message while runtime.ForwardResponseMessage. Coin is a proto message in the reference code.

{
  "jsonrpc": "2.0",
  "id": -1,
  "error": {
    "code": -32603,
    "message": "Internal error",
    "data": "message types.Coin is neither a v1 or v2 Message"
  }
}

Reference integration code is here: https://github.com/cosmos/cosmos-sdk/blob/atheesh/5921-grpc-gateway-register/x/bank/module.go#L68
and it's failing here:
https://github.com/cosmos/cosmos-sdk/blob/atheesh/5921-grpc-gateway-register/x/bank/types/query.pb.gw.go#L315

resp contains the expected data but it is failing inside forward_Query_TotalSupply_0 in the example

To Reproduce

1. git clone github.com/cosmos/cosmos-sdk && cd $GOPATH/src/github.com/cosmos/cosmos-sdk
2. git checkout atheesh/5921-grpc-gateway-register
3. go test x/bank/client/rest/query_test.go

Expected behavior

Should return the query response as resp here: https://github.com/cosmos/cosmos-sdk/blob/atheesh/5921-grpc-gateway-register/x/bank/types/query.pb.gw.go#L31

Actual Behavior

{
  "jsonrpc": "2.0",
  "id": -1,
  "error": {
    "code": -32603,
    "message": "Internal error",
    "data": "message types.Coin is neither a v1 or v2 Message"
  }
}

Looks like something to do with the Marshaler, any help would be really appreciated.

Your Environment

Go: 1.14
Ubuntu: 18.04
Gateway: v1.14.6

[johanbrandhorst]

This implies some part of your code is using the new Go protobuf stack, and your generated Gogo protobuf messages are not working with it. I would search your codebase for uses of google.golang.org/protobuf and either remove them and keep using gogo protobuf, or migrate from gogo protobuf to the official generator. It's a somewhat complicated issue, and probably best covered in the support channel (#grpc-gateway on Gophers slack https://invite.slack.golangbridge.org/). This is not an issue with the gateway but a mismatch between the configured marshaler and the code generator used.