Spark Expands Stablecoin Yields to Optimism and Unichain

Spark has extended support for sUSDC and sUSDS to both Optimism and Unichain, enabling users on either network to access stablecoin-based returns through its savings mechanism.

The process is simple: deposit USDC or USDS and receive sUSDC or sUSDS in return. These representations track deposits and automatically begin accruing yield, with rates governed onchain via the Sky Savings Rate. There’s no need for additional staking or wrapping steps — deposited assets start generating return immediately.

Withdrawals are just as seamless. Users can redeem their sTokens for the original stablecoins plus any yield accumulated over time, without slippage or manual conversion.

This move also brings Spark into closer alignment with the broader Superchain vision. By activating the same earning mechanisms across Ethereum-compatible chains, Spark aims to build a more unified liquidity layer — one that treats networks like Optimism and Unichain as connected parts of a larger system rather than isolated environments.