Sonic Labs has introduced USSD, a network-native U.S. dollar stablecoin designed to serve as a unified liquidity layer inside the Sonic ecosystem. According to the project, USSD is built on Frax’s GENIUS-compatible frxUSD infrastructure and can be minted, redeemed, and transferred across more than 10 chains. It is already live on Sonic, Ethereum, Base, Arbitrum, and seven other networks.
The product targets a basic issue in on-chain finance: predictable, composable dollar liquidity. Sonic said stablecoins act as the “money layer” of on-chain markets, and a native dollar can keep liquidity compounding inside the network instead of drifting into outside venues. A short point, but a central one. The token is meant to connect trading, lending, payments, and treasury operations through one USD-denominated asset.
1:1 backing structure uses tokenized U.S. Treasury products
Sonic said USSD is fully backed 1:1 by high-quality, short-duration U.S. dollar assets. The reserve mix includes tokenized U.S. Treasury products tied to BlackRock’s BUIDL, Superstate’s USTB, and WisdomTree. The company presents that structure as a conservative reserve model that combines institutional-grade backing with on-chain composability.
Minting is handled through non-custodial smart contracts. Users can deposit supported dollar assets such as USDC, USDT, and PYUSD to receive USSD, and the project says minting carries zero fees. Access is permissionless, which means both retail and institutional users can enter Sonic’s dollar liquidity pool through the same mechanism.
Cross-chain redemption and yield recycling feed the Sonic ecosystem
USSD is also built for cross-chain use rather than a single-network role. Sonic said the stablecoin supports flexible minting and redemption across chains, allowing users to move liquidity between networks for settlement, treasury management, and market rebalancing. For DeFi systems operating across several chains, that kind of portability can reduce friction created by fragmented liquidity.
The reserve yield is another key part of the design. Sonic said income generated by backing assets will flow back into the ecosystem and be directed to buybacks, ecosystem incentives, and on-chain incentives. In the project’s wording, a native stablecoin turns visiting liquidity into capital that compounds within the network itself.