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铸造 NFT 并使用大量气体。如何将薄荷糖分成多个较小的请求？

//SPDX-许可证-标识符：MIT

pragma 可靠性 ^0.8.7;

导入“合同/令牌/ERC721/extensions/ERC721Enumerable.sol”；导入“合同/访问/Ownable.sol”；

合同 EmbassyBuddhas 是 ERC721Enumerable, Ownable { using Strings for uint256;

string public baseURI;
string public baseExtension = ".json";
uint256 public cost = 0.05 ether;
uint256 public presaleCost = 0.03 ether;
uint256 public maxSupply = 10000;
uint256 public maxMintAmount = 1000;
bool public paused = false;
mapping(address => bool) public whitelisted;
mapping(address => bool) public presaleWallets;

constructor(
    string memory _name,
    string memory _symbol,
    string memory _initBaseURI
) ERC721(_name, _symbol) {
    setBaseURI(_initBaseURI);
    mint(msg.sender, 100);
}

// internal
function _baseURI() internal view virtual override returns (string memory) {
    return baseURI;
}

// public
function mint(address _to, uint256 _mintAmount) public payable {
    uint256 supply = totalSupply();
    require(!paused);
    require(_mintAmount > 0);
    require(_mintAmount <= maxMintAmount);
    require(supply + _mintAmount <= maxSupply);

    if (msg.sender != owner()) {
        if (whitelisted[msg.sender] != true) {
            if (presaleWallets[msg.sender] != true) {
                //general public
                require(msg.value >= cost * _mintAmount);
            } else {
                //presale
                require(msg.value >= presaleCost * _mintAmount);
            }
        }
    }

    for (uint256 i = 1; i <= _mintAmount; i++) {
        _safeMint(_to, supply + i);
    }
}

function walletOfOwner(address _owner)
    public
    view
    returns (uint256[] memory)
{
    uint256 ownerTokenCount = balanceOf(_owner);
    uint256[] memory tokenIds = new uint256[](ownerTokenCount);
    for (uint256 i; i < ownerTokenCount; i++) {
        tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
    }
    return tokenIds;
}

function tokenURI(uint256 tokenId)
    public
    view
    virtual
    override
    returns (string memory)
{
    require(
        _exists(tokenId),
        "ERC721Metadata: URI query for nonexistent token"
    );

    string memory currentBaseURI = _baseURI();
    return
        bytes(currentBaseURI).length > 0
            ? string(
                abi.encodePacked(
                    currentBaseURI,
                    tokenId.toString(),
                    baseExtension
                )
            )
            : "";
}

//only owner
function setCost(uint256 _newCost) public onlyOwner {
    cost = _newCost;
}

function setPresaleCost(uint256 _newCost) public onlyOwner {
    presaleCost = _newCost;
}

function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner {
    maxMintAmount = _newmaxMintAmount;
}

function setBaseURI(string memory _newBaseURI) public onlyOwner {
    baseURI = _newBaseURI;
}

function setBaseExtension(string memory _newBaseExtension)
    public
    onlyOwner
{
    baseExtension = _newBaseExtension;
}

function pause(bool _state) public onlyOwner {
    paused = _state;
}

function whitelistUser(address _user) public onlyOwner {
    whitelisted[_user] = true;
}

function removeWhitelistUser(address _user) public onlyOwner {
    whitelisted[_user] = false;
}

function addPresaleUser(address _user) public onlyOwner {
    presaleWallets[_user] = true;
}

function add100PresaleUsers(address[100] memory _users) public onlyOwner {
    for (uint256 i = 0; i < 2; i++) {
        presaleWallets[_users[i]] = true;
    }
}

function removePresaleUser(address _user) public onlyOwner {
    presaleWallets[_user] = false;
}

function withdraw() public payable onlyOwner {
    (bool success, ) = payable(msg.sender).call{
        value: address(this).balance
    }("");
    require(success);
} }
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