block域名成交价格

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract DomainRegistry {
    struct Domain {
        address owner;
        string name;
        uint256 price;
    }

    mapping(string => Domain) public domains;

    event DomainRegistered(string name, address owner, uint256 price);
    event DomainTransferred(string name, address from, address to, uint256 price);

    function registerDomain(string memory _name, uint256 _price) public {
        require(domains[_name].owner == address(0), "Domain already registered");
        domains[_name] = Domain(msg.sender, _name, _price);
        emit DomainRegistered(_name, msg.sender, _price);
    }

    function transferDomain(string memory _name, address _to) public payable {
        Domain storage domain = domains[_name];
        require(domain.owner == msg.sender, "Not the owner");
        require(msg.value >= domain.price, "Insufficient payment");
        domain.owner = _to;
        payable(msg.sender).transfer(msg.value);
        emit DomainTransferred(_name, msg.sender, _to, domain.price);
    }
}