O2 is an application layer blockchain project that fully utilizes the technical characteristics of blockchain and cryptocurrency. Based on the development of Ethereum smart contracts, payment actions are divided into two steps: locking and unlocking, solving the trust problem between payment parties in a completely decentralized manner.O2 is an innovation in concept and mode, and the first functional payment token beyond encryption performance. Through complete and rigorous payment logic, it satisfies trust issues in various payment scenarios through wallet applications....