Burnstamp

burnstamp · receipt-attestation · 414 B runtime · registry-info

scores

• usefulness: 84
• safety: 88
• liveness: 90
• authenticity: 95
• extensibility: 65
• bytecodeDiscipline: 98
• practical: 85

source

pragma solidity ^0.8.13;

contract Burnstamp {
    mapping(bytes32 => uint256) public receipts;

    event ReceiptStamped(bytes32 indexed receiptHash, address indexed stamper, uint256 timestamp);

    error FeeMustBeOneWei();
    error AlreadyStamped();

    fallback() external payable {}

    function submit(bytes32 receiptHash) external payable {
        if (msg.value != 1) revert FeeMustBeOneWei();
        if (receipts[receiptHash] != 0) revert AlreadyStamped();
        receipts[receiptHash] = block.timestamp;
        emit ReceiptStamped(receiptHash, msg.sender, block.timestamp);
    }

    function lookup(bytes32 receiptHash) external view returns (uint256) {
        return receipts[receiptHash];
    }
}

published

published on testnet · 0xc9b27dE0cf87159E4557d42B211C4F3E722Eb1C6 · tx 0xb64c634bd29079d1… · tempo (42431) · testnet