Create a Simple Rust Plugin for Human Readable addresse (BIP-353) lookup in Core Lightning

[ShahanaFarooqui]

Implement a Core Lightning plugin in Rust which should have a BIP-353 lookup command and returns the results and the proof. It can utilise already existing crate bitcoin_payment_instructions. In future, xpay and other payment methods can use this feature to resolve BIP-353 addresses.

Acceptance Criteria:

• BIP353 lookup RPC implemented.
• RPC returns results and the proof.
• RPC return appropriate message in case of failure.
• Automated tests covering most possible scenarios.
• Detailed documentation of the RPC.

References:

• https://en.bitcoin.it/wiki/BIP_0353
• https://bitcoin.design/guide/how-it-works/human-readable-addresses/
• https://docs.rs/bitcoin-payment-instructions/latest/bitcoin_payment_instructions/index.html
• https://github.com/rust-bitcoin/bitcoin-payment-instructions

[daywalker90]

I made a PR for this: #8362.

It currently only supports bolt12 offers from bip353 addresses.

The crate you linked and i used would make it quite easy to also lookup lnurlp addresses. Is this wanted?

Are onchain addresses from bip-353 wanted?

I also wasn't sure if a lowercase hex encoding for the proof is the right fit. Any feedback is welcome.

The PR as is would make request over clearnet trying 3 different hard coded DNS servers (cloudflare, google, quad9). Is tor proxying wanted? Should these be configurable?

To write meaningful tests i would assume i have to use a real life bip-353 address, correct? Should i use mine or do you want to provide one?

What do you want me to document for the RPC? Is the output in lightning-cli help enough? A .md file? json schema?

Currently it's just fetchbip353 [address]