动产区块链资产管理新春活动

pragma solidity ^0.8.0;

contract AssetRegistry {
    struct Asset {
        address owner;
        uint256 timestamp;
    }

    mapping(uint256 => Asset) public assets;

    event AssetRegistered(uint256 indexed assetId, address indexed owner);
    event AssetTransferred(uint256 indexed assetId, address indexed from, address indexed to);

    function registerAsset(uint256 assetId) public {
        require(assets[assetId].owner == address(0), "Asset already registered");
        assets[assetId] = Asset(msg.sender, block.timestamp);
        emit AssetRegistered(assetId, msg.sender);
    }

    function transferAsset(uint256 assetId, address newOwner) public {
        require(assets[assetId].owner == msg.sender, "Not the owner");
        assets[assetId].owner = newOwner;
        emit AssetTransferred(assetId, msg.sender, newOwner);
    }
}