I. Introduction.ZetaChain is a decentralized and public blockchain network that aims to open the crypto and global financial ecosystem to anyone. It offers a unique solution to the problems of "cross-chain" and "multi-chain" by enabling omnichain, generic smart contracts, and messaging between any blockchain. This allows for a truly fluid, multi-chain crypto ecosystem, where users and developers can move between and appreciate the benefits of any blockchain: payments, DeFi, liquidity, games, ...