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XCMv2 has now been audited for a second time to discover any potential cross-chain security or fairness issues, including logical bugs, denial-of-service, and incorrect lock/unlock or burn/mint on both chains

Web3 Foundation engaged Chain Security for an audit of the Polkadot Claims smart contract. The audit found 0 Critical, 0 High, 2 Medium and 9 Low level issues, all of which have been resolved in the latest commits to the code.