Submission Details
Severity:
Prevent replay attacks
Check for duplicate/replayed CCIP messages
// Storage mapping
mapping(bytes32 => bool) public received;
function ccipReceive(bytes memory _message) external {
bytes32 msgId = getMessageId(_message);
// Check not processed
require(!received[msgId], "Replay attack");
// Mark received
received[msgId] = true;
// Rest of logic
}
Prize pool breakdown
Total prize
27,500 USDC
nSLOC
1,41419 USDC / LOC
25,000 USDC
2,500 USDC
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