Nadav Kohen and Payment Points - Episode 7

In Episode 7, we chat with Nadav Kohen of Suredbits and discuss payment points as an alternative to HTLCs on the Lightning Network.

In this conversation we cover:

• Payment points (1:55)
  
  - Blog post part 1
  
  - HTLCs (2:00)


• Timelocks (4:16)


• HTLC drawbacks (5:38)
  
  - Payment decorrelation
  
  - Wormhole attack presented in Anonymous Multi-Hop Locks for Blockchain Scalability and Interoperability (6:35)


• Point time lock contracts (PTLCs) (9:50)
  
  - Adaptor signatures on Schnorr


• Proof of payment (13:25)


• Invoiceless transactions (15:05)


• Hashes, pre-images, and HTLC mechanics (16:35)


• Onion analogy (18:55)


• PTLC mechanics (19:30)


• Why don’t we use PTLCs today? (22:15)


• Lightning in Scriptless Scripts posting by Andrew Poelstra March 2017


• Improving proof of payment (26:10)


• Stuckless payments (30:46)


• Spam on Lightning (35:46)


• Selling Signatures and Schnorr signatures off the main chain (36:55)


• Contingent payments (39:20)


• Escrow contracts (41:28)


• Atomic multiparty setup and payment renegotiation (46:02)


• ETA of payment points (48:02)

Thanks as always to Matthew Zipkin for the sound engineering.