🍰Baseplate Object

Original and creative Baseplate

A baseplate serves as the foundation for creating your world.

A baseplate allows you to build your world in the direction you choose, providing the foundation for creating and expanding your world.

(Draft of Baseplate...)

Windows model

Contract

BasePlate: '0xE83d625E021f8238f418c068D256FeceDE705970', https://polygonscan.com/address/0xE83d625E021f8238f418c068D256FeceDE705970

PhiMap: '0xe8b6395d223C9D3D85e162f2cb2023bC9088a908', https://polygonscan.com/address/0xe8b6395d223C9D3D85e162f2cb2023bC9088a908

The wallpaper and baseplate objects are designed to prevent multiple deposits in a map contract in order to save on gas fees. You can see behavior of Baseplate from changeWallpaper method.

 
    /*
     * @title checkBasePlate
     * @notice Functions for check BasePlate status
     * @param name : ens name
     * @dev Check BasePlate information
     * @return contractAddress,tokenId
     */
    function checkBasePlate(string memory name) external view returns (BasePlate memory) {
        return basePlate[name];
    }


    /*
     * @title changeBasePlate
     * @notice Receive changeBasePlate
     * @param name : ens name
     * @param contractAddress : Address of BasePlate
     * @param tokenId : tokenId
     */
    function _changeBasePlate(
        string memory name,
        address contractAddress,
        uint256 tokenId
    ) internal {
        address lastBasePlateContractAddress = basePlate[name].contractAddress;
        uint256 lastBasePlateTokenId = basePlate[name].tokenId;
        // Withdraw the deposited BasePlate OBJECT at the same time if it has already been deposited
        if (lastBasePlateContractAddress != address(0)) {
            IObject _lastBasePlate = IObject(lastBasePlateContractAddress);
            _lastBasePlate.safeTransferFrom(address(this), msg.sender, lastBasePlateTokenId, 1, "0x00");
        }
        // Check condition
        _checkConditon(name, contractAddress, tokenId);
        basePlate[name] = BasePlate(contractAddress, tokenId);
        // Deposit BasePlate object to be set in map contract
        IObject _object = IObject(contractAddress);
        _object.safeTransferFrom(msg.sender, address(this), tokenId, 1, "0x00");
        emit ChangeBasePlate(name, contractAddress, tokenId);
    }
    

    function _checkConditon(
        string memory name,
        address contractAddress,
        uint256 tokenId
    ) internal view {
        // Check that contractAddress is whitelisted.
        if (!_whitelist[contractAddress]) revert InvalidWhitelist();
        IObject _object = IObject(contractAddress);
        IObject.Size memory size = _object.getSize(tokenId);
        // Check that the size of the wall object matches the size of the current map contract
        if ((size.x != mapSettings.maxX) || (size.y != mapSettings.maxY)) {
            revert NotFit(msg.sender, size.x, size.y, mapSettings.maxX, mapSettings.maxY);
        }
        // Check if user has a wall object
        uint256 userBalance = _object.balanceOf(msg.sender, tokenId);
        if (userBalance < 1) {
            revert NotBalance({ name: name, sender: msg.sender, contractAddress: contractAddress, tokenId: tokenId });
        }
    }

     

CheckConditon methods check whether the owner has a baseplate or not, and whether the map size is 8*8 and the baseplate size is consistent.

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