Danchor is a decentralized mortgage-based stable coin project based on EOS, which supports users to mortgage EOS to issue a stable coin USN (1: 1 anchored USD). Through the risk control mechanism of excess mortgage and liquidation of liquidation, the system effectively avoids market fluctuations and ensures that there are sufficient collateral to provide value support for each USN. Decentralized operation based on smart contracts, information is open and transparent, and data can be checked in real time on the chain. Mortgage issuance of USN can meet the needs of various financial transactions such as leveraged transactions and obtaining liquid funds.