grpc: Missing command AddPsbtOutput

[dangeross]

Command AddPsbtOutput is missing from cln-grpc and cln-rpc.

[Vayras]

Hey @dangeross Can I get some info on this issue, I actually would like to work on this one but I would really like to know more about this issue, Thanks

[ErikDeSmedt]

Core Lightning exposes a couple of API's. The most important one is the rpc-interface which is feature-complete.

The issue mentions cln-rpc which is a rust-crate that can be used to query the rpc-interface. The code of this crate is located in the cln-rpc folder. The cln-grpc that exposes the same API using gRPC. It implements both a client and a server.

The addpsbtoutput exists in the rpc-interface but has no counterpart in the cln-rpc and the cln-grpc crate yet.

Most of the code in the cln-rpc and cln-grpc crate is auto-generated.
To fix the issue you must

1. Create the appropriate schema in doc/schemas. Consult the docs to know what fields you should add. Hint, each field requires an added annotation. The next version of Core Lightning will be 24.05
2. Run msggen to generate the code

• python contrib/msggen/msggen/__main__.py bundle $PWD/doc/schemas
• python contrib/msggen/msggen/__main__.py generate

3. Review and commit the generated code

[s373nZ]

I created an initial PR for this in #7108.