Introduction DeFi has driven the high gas costs of developers and traders away from Ethereum to new high-performance chains such as Binance Smart Chain, Polygon and Solana in recent years. The world of crypto is being embraced as a multi-layered and multi-layered future, where users move between different chains and use a mixed bag of crypto-tokens to fulfill their diverse demands. This prospect, while creating great value for DeFi, also brings with it many problems: 1. Fragmentation of liqui...