first commit

server/internal/grpc/codec.go

@@ -0,0 +1,20 @@
+package grpcserver
+
+import (
+	"encoding/json"
+)
+
+// JSONCodec is a gRPC codec that uses JSON encoding.
+type JSONCodec struct{}
+
+func (JSONCodec) Marshal(v interface{}) ([]byte, error) {
+	return json.Marshal(v)
+}
+
+func (JSONCodec) Unmarshal(data []byte, v interface{}) error {
+	return json.Unmarshal(data, v)
+}
+
+func (JSONCodec) Name() string {
+	return "proto" // override default proto codec name so gRPC uses it
+}