USDs is a stablecoin that combines crypto-collateralization and algorithmic mechanisms. It offers high scalability, trustlessness, and will achieve full decentralization with the implementation of the governance protocol. The stability of USDs relies on the SPA token, which operates entirely on-chain. Additionally, USDs will invest its collateral in audited decentralized projects such as Curve to generate yield, and the yield will be distributed to USDs holders. By holding USDs, users can directly earn yield in their wallets. USDs provides a cost-efficient and relatively low-risk way to participate in DeFi. Initially launching on Arbitrum, USDs aims to establish interoperability with other major blockchains.