The smart contract-based p2p exchange is PeerEx on one of the platforms that boost exchanges. I would like to tell you that this platform is widely used as a decentralized platform for exchanging various assets. It can be said that this platform is gaining the love of customers by the fact that it will not control them. I would say that it would not be wrong to say that this platform will be fully implemented by smart contracts without any protection by peerex. Among the platforms, there are already a number of platforms that use smart contracts with business partners, or for liquidity management and rewards.