TL;DR Base will implement fault proofs on the mainnet on October 30, strengthening decentralization and security. Users will be able to challenge invalid withdrawals without relying on intermediaries, eliminating the need for a trusted third party. The update will replace the “L2OutputOracle” contract with “DisputeGameFactory,” improving security in transactions. Base, the layer 2 solution...
source: https://crypto-economy.com/base-announces-upcoming-mainnet-launch-of-fault-proofs-for-enhanced-security-and-decentralization/