Fault Proofs Explainer | Optimism Docs

Fault Proofs are an important part of an Optimistic Rollup system like the OP Stack. Users withdraw ETH and tokens from OP Stack chains like OP Mainnet by submitting a withdrawal proof that shows the withdrawal was actually included in the OP Stack chain. Fault Proofs allow users to permissionlessly submit and challenge the proposals about the state of an OP Stack chain that are used to prove withdrawals. On June 10, 2024, Fault Proofs were officially added to the OP Stack and were activated on OP Mainnet. This Fault Proofs upgrade moves the OP Stack closer to technical decentralization by: Although the fault proof game is permissionless, the Optimism Security Council acting as the Guardian role provides a backstop in case of a failure in the fault proof game. Each proposal must wait for a delay period during which the Guardian can prevent invalid proposals from being used to withdraw ETH or tokens through a number of safety hatches. The Guardian can also choose to shift the system to

Fault Proofs are an important part of an Optimistic Rollup system like the OP Stack. Users withdraw ETH and tokens from OP Stack chains like OP Mainnet by submitting a withdrawal proof that shows the withdrawal was actually included in the OP Stack chain. Fault Proofs allow users to permissionlessly submit and challenge the proposals about the state of an OP Stack chain that are used to prove withdrawals. On June 10, 2024, Fault Proofs were officially added to the OP Stack and were activated on OP Mainnet. This Fault Proofs upgrade moves the OP Stack closer to technical decentralization by: Al