Use existing bip322 crate

[notmandatory]

I just noticed there's already a bip322 crate. Would it make sense to use that as a dependency rather than re-implementing the same logic in this project?

If you've implemented more features you could also try upstreaming those as PRs on that project.

[aagbotemi]

On the rust-bitcoin/bip322 crate, the bigger issue is the feature coverage;

• Proof-of-funds (FullProofOfFunds) — not supported.
• P2WSH and multisig verification — not supported.
• Legacy (Bitcoin Core) message format — not supported.

Script coverage limited to P2WPKH, P2TR, and P2SH-P2WPKH.

On upstreaming, I'll contribute the features back to bip322 and decoupled them from the wallet.

[notmandatory]

If you can upstream those missing features that'd be great. It might take some time to do, but we can still use your PR branch to test it with bdk-message-signer and bdk_wallet right?

[aagbotemi]

Yes. the bip322 crate from rust-bitcoin will be used as a dependency here on bdk-message-signer.