"One ETH" is a game based on blockchain, launched by global blockchain enthusiasts. It is also a smart contract based on the blockchain 2.0. Its open source code is audited by an authoritative third-party audit agency, so technical security is more stable. The participation information of all users in the game and the calculation of each reward are all completed on the blockchain and cannot be tampered with. Every user can participate in the game fairly and transparently, no longer has the drawback of black-box operation.