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  2. /Glossary
  3. /Fraud Window
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blockchain

Fraud Window

The challenge period in optimistic rollups during which anyone can submit a fraud proof if they detect an invalid state transition.

Definition

The challenge period in optimistic rollups during which anyone can submit a fraud proof if they detect an invalid state transition. Typically 7 days for major rollups like Optimism and Arbitrum. During this window, withdrawals to L1 are delayed while the system waits for potential challenges.

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Related Terms

Optimistic Rollup

A Layer 2 scaling solution that assumes all transactions are valid and only runs computation if someone challenges a transaction.

Fraud Proof

A mechanism used by optimistic rollups to verify transactions.

Layer 2

A secondary network built on top of a Layer 1 to improve scalability.

ABI

Application Binary Interface.

Account Abstraction

A way to make crypto wallets behave more like normal apps by turning every account into a smart contract.

ERC-4337

The Ethereum standard for account abstraction without changing the core protocol.

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