A fraud proof is a mechanism that helps verify the integrity of transactions in a blockchain. It serves as a way to demonstrate that a transaction has been executed correctly without needing to rely solely on trust.When a transaction occurs, a fraud proof can be generated to provide evidence that it complies with the rules of the network. This proof can be used to challenge or invalidate a transaction if any discrepancies arise. Essentially, it acts as a safeguard against malicious activities or errors.Fraud proofs are particularly useful in systems that allow for off-chain transactions or when participants need to prove the validity of their actions without revealing sensitive information. By using these proofs, users can maintain a level of privacy while ensuring that the transactions are legitimate.Overall, fraud proofs enhance the security and credibility of transaction processes, ensuring that all parties involved can confidently validate activities on the network.