PTLC (Point Time-Locked Contract)
Layer 2● Common
A Lightning Network payment primitive using adaptor signatures instead of hash preimages. Provides better privacy than HTLCs because each hop uses a different adaptor point, preventing correlation of payment hops. Requires Taproot and Schnorr signatures.
Technical Notes
Payment point P = p·G where p is the payment secret. Each hop adds a random blinding factor: P' = P + b·G. Receiver knows p, returns p+b to complete the adaptor signature. Eliminates the 'payment hash' correlation vector in current HTLCs.
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Visibility: Public
Created:1/3/2026by System