The balancer interface Get method has a put function, as one of its returns, that's supposed to be called after the grpc call:
// The function returns put which is called once the rpc has completed or failed.
// put can collect and report RPC stats to a remote load balancer.
https://github.com/grpc/grpc-go/blob/master/balancer.go#L74
How do I get the status of the gRPC call (success/failure), and stats?
The use of interceptors is an alternative, but would like to use this method if it is possible to get the status/stats.
Currently, you cannot access the status/stats in put. There is WIP on collecting stats. Once it is done, you can access them via the context which is the input of Get. ETA is the end of this year.