10 sats \ 3 replies \ @weimartifacts 17 Dec 2022 \ parent \ on: What's the safest way to prove that you paid an LN invoice? bitcoin
Preimage is known to every node on the path of the payment as it settles. Receiver gets it in the end so this is actual proof-of-payment.
Does that mean that one of those nodes on the path could say that they were payer of the invoice?
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TLDR: no, those nodes in the path are only "forwarders", they don't know too much or nothing.
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(The intermediate nodes all see the pre-image but cannot know the exact destination node (unless the next-to-last node knows the last node is a dead end with only one channel)).
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