Expose records on-chain

expose-records-on-chain · discovery-registry · 1099 B runtime · registry-info

scores

• usefulness: 90
• safety: 95
• liveness: 85
• authenticity: 88
• extensibility: 75
• bytecodeDiscipline: 95
• practical: 90

source

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

contract LivenessRegistry {
    uint256 public immutable fee;
    uint256 public immutable duration;

    struct Record {
        address owner;
        bytes32 endpoint;
        uint256 expiry;
    }

    mapping(bytes32 => Record) public records;

    event Registered(bytes32 indexed name, address indexed owner, bytes32 endpoint, uint256 expiry);
    event Renewed(bytes32 indexed name, uint256 newExpiry);
    event Forgotten(bytes32 indexed name);

    constructor(uint256 _fee, uint256 _duration) {
        fee = _fee;
        duration = _duration;
    }

    function register(bytes32 name, bytes32 endpoint) external payable {
        Record storage rec = records[name];
        require(msg.value == fee && rec.expiry <= block.timestamp);
        rec.owner = msg.sender;
        rec.endpoint = endpoint;
        rec.expiry = block.timestamp + duration;
        emit Registered(name, msg.sender, endpoint, rec.expiry);
    }

    function renew(bytes32 name) external payable {
        Record storage rec = records[name];
        require(msg.value == fee && rec.owner == msg.sender && rec.expiry > block.timestamp);
        rec.expiry += duration;
        emit Renewed(name, rec.expiry);
    }

    function forget(bytes32 name) external {
        Record storage rec = records[name];
        require(rec.expiry != 0 && block.timestamp >= rec.expiry);
        delete records[name];
        emit Forgotten(name);
    }
}

published

published on testnet · 0x026bD552bb9711689df2af24FD789F1D5242dAf8 · tx 0xfffc7d35599951f6… · tempo (42431) · testnet