Feature/cln

[kiwiidb]

This draft PR is meant to track C-Lightning support. According to rumours, @cdecker is working on an official gRPC interface for C-Lightning. So we should rewrite this PR once that is released, so we don't have to rely on the Sparko plugin anymore.

[urza]

There was some grpc support aded to CLN in 0.11

https://github.com/ElementsProject/lightning/releases/tag/v0.11.0.1

What exactly is needed?

[prusnak]

Here is the official cln-grpc plugin documentation: https://lib.rs/crates/cln-grpc and its API reference: https://docs.rs/cln-grpc/latest/cln_grpc/

[kiwiidb]

There are 2 things that are needed right now:

• CLN gRPC interface is missing certain methods, for example we use the decode method to decode a bolt11 (I outsourced this to the LN node to reduce dependencies in the lndhub.go code).
• I am waiting on an answer on this question, on how to connect remotely using mTLS.

I will create a new PR for CLN gRPC support and close this one later because it is outdated.

[prusnak]

• CLN gRPC interface is missing certain methods, for example we use the decode method to decode a bolt11 (I outsourced this to the LN node to reduce dependencies in the lndhub.go code).

I agree with the sentiment here. However, if CLN gRPC is not adding this, you can use for example this: https://github.com/nbd-wtf/ln-decodepay

[kiwiidb]

I've updated this PR but stumbled upon another issue which blocks CLN integration: C-Lightning doesn’t support creating an invoice with a description_hash as input parameter (it needs the description and does the hashing itself).