Author: Anthony Towns 2023-01-26 01:04:12
Published on: 2023-01-26T01:04:12+00:00
In a recent email thread, the sender's challenge of receiving an invoice from the receiver when they are offline was discussed. The proposed solution involves a BIP340 signature of the message "Alice has paid me $50 -- signed Bob" with Bob's public signature nonce R. To avoid attacks via Wagner's algorithm, it is suggested to share (R1,R2) pairs and calculate R = H(P,R1,R2,m)*R1+R2. This process requires Bob to pre-generate a set of nonces and share the public part with Larry. To claim a nonce, Alice may have to make a micropayment to Larry. The setup also allows for separate LSPs: one to issue nonces while the recipient is offline and the other to hold onto incoming PTLCs. Previous discussions on this topic can be found in the provided links.
Updated on: 2023-06-03T11:30:15.626715+00:00