Optimistic Rollup

Public.icon

from Plasma = Layer2(OPU, ZkR)#619e7a0d09c5f200000047f2

one of the Rollups

one of the leading candidates for L2

Unlike zk-Rollup, Optimistic Rollup uses Fraud Proof, which makes it slower to withdraw from L2 to L1. However, due to its low gas and cost and technical simplicity, it is currently one of the leading candidates for L2.

https://bokujyuumai-salon.ethereum-japan.net/wiki/13383

Optimism and Arbitrum seem to be adopting it

EVM compatible

The antonym is Zk-Rollup.