Decentralized Fair Exchange

学习笔记

Exchange same chain coin

• 协商一个both signed tx
• Create a multi-sign escrow address managed by both users
  ○ A0 -> multi-sign escrow address -> B0
  ○ B1 -> multi-sign escrow address -> A1

Exchange different chain coin

https://en.bitcoin.it/wiki/Atomic_swap

• Hash-time lock: hashLock+timeLock
  https://en.bitcoin.it/wiki/Hash_Time_Locked_Contracts
  ○ Can be used in payment channel also
• P2P tradeX: need a special chain
  ○ 链B提交一个特定交易commitment，链A上先正常交易，链B可以解析用户提交的链B的交易，然后链B自动执行交易。从而完成跨链交易
  ○ https://bitcointalk.org/index.php?topic=91843.0
  ○ https://bitcointalk.org/index.php?topic=1619536.0

More generation fair exchange

• Fair exchange with RSA blinding
• Fairswap: optimistic proof
• Zkcp: zk proof

Zk proof & optimistic proof

• Truebit/Arbitrume: with a vm for optimistic proof
• Zksync: stnark zk proof