如何在 Solidity 中制作需要 0.1 个以太币的铸币功能？

Question

有人可以解释一下如何在 Solidity 中创建一个为 0.1 eth 铸造令牌并在 HardHat 中验证它的函数吗？到目前为止我已经这样做了：

安全帽：

[owner] = await ethers.getSigners();
const Nft = await ethers.getContractFactory("contract");
const nft = await Nft.deploy(owner.address);

prov = ethers.getDefaultProvider();
let balance = await prov.getBalance(owner.address);
console.log(balance); <-- evaluates to 10000000000000

await hoodie.mint({ value: ethers.utils.parseEther("0.1") });

console.log(balance); <-- still evaluates to 10000000000000

坚固性：

function mint() payable public returns (uint256) {;
        require(msg.value == 0.1 ether || msg.value == 100000000000000000 wei, "Transaction amount has to be 0.1 eth");

        _safeMint(msg.sender, token_id);

        return token_id;
    }

提前致谢！

Answer 1

在这种情况下，

您可以尝试添加批准和转移方法。

approve 需要您批准资金转帐

transferFrom 需要进行资金转移

合同：

function mint() payable public returns (uint256) {
     require(msg.value == 0.1 ether || msg.value == 100000000000000000 
         wei, "Transaction amount has to be 0.1 eth");

     IERC20(*the ETH address here*).approve(msg.sender, msg.value);
     IERC20(*the ETH address here*).transferFrom(msg.sender, address(this), msg.value);

      _safeMint(msg.sender, token_id);

     return token_id;
    }

Answer 2

     require(msg.value == 0.1 ether || msg.value == 100000000000000000 
         wei, "Transaction amount has to be 0.1 eth");

      payable(this).transfer(msg.value);

      _safeMint(msg.sender, token_id);

     return token_id;
    }