TL;DR Polymer Hub, an innovative protocol, has been launched to improve real-time interoperability between rollups on the Ethereum network. Using the IBC protocol and sequencer pre-confirmations, it optimizes cross-chain communication, reducing latency and costs. The protocol includes re-org protection, ensuring the integrity of cross-chain transactions and the ability to automatically revert...
source: https://crypto-economy.com/polymer-hub-now-live-on-ethereum-mainnet-bringing-real-time-connectivity-to-rollups/