可更改应付金额

Question

快速向您提问。是否可以从智能合约中隐藏“应付金额”？因为人们可以从智能合约中铸造并设置他们想要的任何值。从 Polygonscan 添加的屏幕截图。任何人都可以输入任何数量，这将允许铸币。

提前致谢！ [1]: https://i.stack.imgur.com/wQ8J4.png

    function mint(uint256 _mintAmount) public payable {
    require(!paused, "the contract is paused");
    uint256 supply = totalSupply();
    require(_mintAmount > 0, "need to mint at least 1 NFT");
    require(_mintAmount <= maxMintAmount, "max mint amount per session exceeded");
    require(supply + _mintAmount <= maxSupply, "max NFT limit exceeded");

    if (msg.sender != owner()) {
        if(onlyWhitelisted == true) {
            require(isWhitelisted(msg.sender), "user is not whitelisted");
            uint256 ownerMintedCount = addressMintedBalance[msg.sender];
            require(ownerMintedCount + _mintAmount <= nftPerAddressLimit, "max NFT per address exceeded");
        }
        require(msg.value >= cost * _mintAmount, "insufficient funds");
    }

    for (uint256 i = 1; i <= _mintAmount; i++) {
      addressMintedBalance[msg.sender]++;
      _safeMint(msg.sender, supply + i);
    }
  }

Answer 1

Polygonscan 和其他区块链浏览器显示带有 payable 修饰符的所有 Solidity 函数的 payableAmount 字段。

但是，您可以验证合约中收到的值并在该值意外时恢复交易。

function mint() public payable {
    require(msg.value == 1e18);
}

注意：msg.value是一个read-only全局变量，返回收到的金额wei。所以“1e18 wei”是“1 MATIC”（在 Polygon 上）。

可更改应付金额

Payable amount can be changed

ethereum

solidity

polygon

smartcontracts