EEZ has launched Rollup X, a rollup solution enabling single-transaction mainnet swaps. According to EEZ, CoW Swap solvers filled an order on Ethereum mainnet and returned tokens directly to the rollup within one transaction. The devnet implementation relies on signer attestations rather than zero-knowledge proofs to verify cross-chain settlement. The approach aims to simplify integration with existing solver networks while maintaining composability between rollups and mainnet DeFi protocols.