On June 23rd, according to the official announcement, the Fault Proofs system (Fault Proofs) is expected to go live on Base Sepolia (testnet) in mid-July. Fault Proofs are a key implementation on the road to decentralization for L2. They make the method of verifying L2 status more decentralized and pave the way for more community involvement. Changes to Testnet withdrawals after going live include: Withdrawals will be proven and finalized according to the Fault Proof system; Withdrawals will no longer be instant and will take at least seven days to complete, or may take longer; DisputeGameFactory will replace the L2O outputOracle as a new contract for output root claims. If testnet funds are being withdrawn from L2 to L1, withdrawals prior to the mid-July upgrade will be processed immediately; withdrawals during or after the Base Sepolia proof-of-failure upgrade will take at least seven days to complete.