Quick TakeOptimistic Rollups are a Layer 2 scaling solution that derive their security from an underlying blockchain (Ethereum)ORs are most notably being developed by Optimism, formerly known as Plasma Group. In January, the team raised $3.5 million from Paradigm and IDEO CoLab VenturesSynthetix is the first project to trial on the Optimistic Ethereum testnet, which launched on September 25th