this is fine. you do have JavaScript SDK. examples and helper functions are not very difficult to built. as far as specifically "building first app guide" and figuring out how to do an expand based on the types for the corresponding RPC call - there is a little bit of a gap to bridge, for someone like me at least. regardless, you have given me several reference points. perhaps, i will able to use those and make something that can be adopted into a JavaScript example.