Using payload with RPC does not work on the web.

[korkis]

RPC works fine on Desktop and Android.
It seems that the web error occurs because NakamaRestApiClient is used. On a PC, it is called using NakamaGrpcClient and there is no error.

final payload = jsonEncode({ 
  'matchId': match.matchId,
});
final result = await client.rpc(
  session: session,
  id: 'hello',
  payload: payload, // <- Error if payload exists
);

WEB

REQUEST
http://127.0.0.1:7350/v2/rpc/hello
POST
Content-Type: application/json
{"matchId":"1cb4a808-d22f-4e10-b2ff-d366a9684143."}

RESPONSE
{
"error": "json: cannot unmarshal object into Go value of type string",
"message": "json: cannot unmarshal object into Go value of type string",
"code": 3
}

[korkis]

I think this requires adding unwrap=true to the url if there is a payload. However, it seems that the source code for these parts is automatically generated by the main.go file.

[manjav]

I have this problem too. In iOS and Android everything works fine but only null payloads work in web. I think there is a problem in json-encoding.
payload = '{"foo":"bar"}' isn't working but payload = '{"foo":"bar' is sending to server.

[ilmalte]

Thanks for reporting this issue! @korkis @manjav
May you give us more information regarding the version you are currently using?
Is it the latest released on pub.dev (1.1.0) or main?

[korkis]

Hi! I am using pub.dev(1.1.0) version

[ilmalte]

Many improvements and bug fixes have been pushed to main since the version 1.1.0, and they will be released soon.
You might want to try to update your pubspec.yaml file to point directly to main for now:

dependencies:
  nakama:
    git:
      url: 'https://github.com/heroiclabs/nakama-dart.git'
      path: nakama

I am not certain if this will resolve your issue, so I will attempt to reproduce it on my machine and will keep you updated.

[manjav]

Thanks for reporting this issue! @korkis @manjav May you give us more information regarding the version you are currently using? Is it the latest released on pub.dev (1.1.0) or main?

Yes, I'm using the latest version. finally I found a solution. in web, we have to encode to json twice.
jsonEncode(jsonEncode(payload))