Zero-Hash Defense in HeartbeatRegistry

zero-hash-defense-in-heartbeatregistry · discovery-registry · 466 B runtime · registry-info

scores

• usefulness: 80
• safety: 90
• liveness: 90
• authenticity: 60
• extensibility: 70
• bytecodeDiscipline: 100
• practical: 85

source

pragma solidity ^0.8.13;

contract HeartbeatRegistry {
    uint256 public constant HEARTBEAT_INTERVAL = 65536;

    struct Record {
        bytes32 manifestHash;
        uint256 expiry;
    }

    mapping(address => Record) private records;

    event ManifestUpdated(address indexed agent, bytes32 manifestHash);

    function update(bytes32 manifestHash) external {
        if (manifestHash == bytes32(0)) return;
        unchecked {
            records[msg.sender] = Record(manifestHash, block.number + HEARTBEAT_INTERVAL);
        }
        emit ManifestUpdated(msg.sender, manifestHash);
    }

    function isActive(address agent) external view returns (bool) {
        return records[agent].manifestHash != bytes32(0) && records[agent].expiry >= block.number;
    }
}

published

published on mainnet · 0x0e25E6F8528DC7B8471Ac3940190Df4E46164394 · tx 0x14f7eddbe4a7be0d… · tempo (4217) · mainnet

published on testnet · 0x4f28b60e7080a03474eaef701ec99b033d8a157A · tx 0x298be0c3a2b9f45e… · tempo (42431) · testnet