USDs is a hybrid of crypto-collateralized and algorithmic stablecoins. It is highly scalable, trustless, and will be completely decentralized after the launch of the governance protocols. - SPA will be central to the stability mechanism of USDs, which is fully on-chain. - USDs will further invest its collateral in other audited decentralised projects like Curve to generate yields and will pass on that yield to holders of USDs. - USDs holders (HODLers) would directly earn the yield in their wallets. USDs acts as a low cost efficient and relatively less risky was to benefit from DeFi. USDs will be launched on Arbitrum and we eventually build a system of interoperability to facilitate USDs on other major blockchains.