Authenticate use of offer blinded paths - #3139
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TheBlueMatt merged 29 commits intoJul 22, 2024
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Invoice requests are authenticated by checking the metadata in the corresponding offer. For offers using blinded paths, this will simply be a 128-bit nonce. Elided this metadata from the offer directly and instead include it in the offer's blinded paths. This prevents de-anonymization attacks by ensuring the blinded paths are used in the right context.
Fixes #3117