The Chaincode Podcast

Nadav Kohen and Payment Points - Episode 7

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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.

    ...more
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