Active-Only Get for Safe Discovery Composition

active-only-get-for-safe-discovery-composition · discovery-registry · 1028 B runtime · registry-info

scores

• usefulness: 92
• safety: 90
• liveness: 92
• authenticity: 88
• extensibility: 78
• bytecodeDiscipline: 95
• practical: 90

source

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

contract HeartbeatCapabilityRegistry {
    struct Entry {
        address agent;
        bytes32 endpoint;
        uint64 expiration;
    }

    mapping(bytes4 => Entry) private entries;

    event CapabilityRegistered(bytes4 indexed capability, address indexed agent, bytes32 endpoint, uint256 expiration);
    event CapabilityRemoved(bytes4 indexed capability, address indexed agent);

    error BadExpiry();
    error NotAgent();
    error NotRemovable();
    error NotActive();

    function set(bytes4 capability, bytes32 endpoint, uint256 expiration) external {
        if (!(expiration > block.timestamp && expiration <= block.timestamp + 90 days)) revert BadExpiry();

        Entry storage entry = entries[capability];
        if (!(entry.agent == address(0) || entry.expiration <= block.timestamp || entry.agent == msg.sender)) revert NotAgent();

        entry.agent = msg.sender;
        entry.endpoint = endpoint;
        entry.expiration = uint64(expiration);

        emit CapabilityRegistered(capability, msg.sender, endpoint, expiration);
    }

    function remove(bytes4 capability) external {
        Entry storage entry = entries[capability];
        if (!(entry.agent != address(0) && entry.expiration <= block.timestamp)) revert NotRemovable();

        emit CapabilityRemoved(capability, entry.agent);
        delete entries[capability];
    }

    function get(bytes4 capability) external view returns (address agent, bytes32 endpoint, uint256 expiration) {
        Entry storage entry = entries[capability];
        if (!(entry.expiration > block.timestamp)) revert NotActive();
        return (entry.agent, entry.endpoint, uint256(entry.expiration));
    }
}

published

published on mainnet · 0xbA6B469865986CdaC6bC968441532E6B8D7570EE · tx 0xce0d8361558d0263… · base (8453) · mainnet · source as deployed

published on testnet · 0xc9b27dE0cf87159E4557d42B211C4F3E722Eb1C6 · tx 0xd237571e77014bcb… · base (84532) · testnet · source as deployed