Funding tx management (CKB Only)

[doitian]

The sepc256k1 private key must be saved as a file using the path "ckb_chain/key". The file must encode the private key as hex without the "0x" prefix.

Example config:

ckb_chain:
  # sighash_all
  funding_source_lock_script_code_hash: "0x9bd7e06f3ecf4be0f2fcd2188b23f1b9fcc88e5d4b65a8637b17723bbda3cce8"
  funding_source_lock_script_hash_type: "type"

  # funding lock
  funding_cell_lock_script_code_hash: "0x8090ce20be9976e2407511502acebf74ac1cfed10d7b35b7f33f56c9bd0daec6"
  funding_cell_lock_script_hash_type: "type"

services:
  - ckb_chain

[contrun]

The functionality of the mod ckb_chain is indispensable for the ckb payment channel network. I think this mod would suit itself better as an sub module to ckb. How do you think of that? One benefit of using ckb_chain as a separate service is that in this case we can run a standalone daemon remotely that does nothing but signing funding transactions. I don't know if this is a real use case.

[doitian]

I have no strong opinion on this. However, I think we'd better refactor it into a submodule later after the demo.