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Implement Bolt12 payer proofs#3297

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Implement Bolt12 payer proofs#3297
t-bast wants to merge 2 commits into
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bolt12-payer-proofs

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@t-bast

@t-bast t-bast commented May 4, 2026

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As specified in lightning/bolts#1295. Note that this doesn't include the latest changes to build a merkle tree with all payer proof TLVs (since test vectors aren't updated yet and discussions are still ongoing on how to handle leaf nonces for payer proof TLVs).

@t-bast t-bast force-pushed the bolt12-payer-proofs branch 3 times, most recently from a2f8083 to 9ea9c5c Compare May 11, 2026 15:21
@t-bast t-bast force-pushed the bolt12-payer-proofs branch from 9ea9c5c to 9876677 Compare May 19, 2026 12:57
The `proof_signature` now signs a merkle tree that contains all TLVs of
the payer proof, similar to how `offer`, `invoice_request` and `invoice`
are signed.
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