如何在 Remix IDE 中设置 msg.value

Question

这可能是我遗漏的一个简单错误，但我终究无法弄清楚如何在此合同中设置 msg.value 变量。我在网上看到这个值是与交易关联的wei的数量，但是我作为合约的调用者具体怎么设置这个值。这是我正在努力处理的合同。

pragma solidity 0.8.7;

合同自动售货机{

// Declare state variables of the contract
address public owner;
mapping (address => uint) public cupcakeBalances;

// When 'VendingMachine' contract is deployed:
// 1. set the deploying address as the owner of the contract
// 2. set the deployed smart contract's cupcake balance to 100
constructor() {
    owner = msg.sender;
    cupcakeBalances[address(this)] = 100;
}

// Allow the owner to increase the smart contract's cupcake balance
function refill(uint amount) public {
    require(msg.sender == owner, "Only the owner can refill.");
    cupcakeBalances[address(this)] += amount;
}

// Allow anyone to purchase cupcakes
function purchase(uint amount) public payable {
    require(msg.value >= amount * 1 ether, "You must pay at least 1 ETH per cupcake");
    require(cupcakeBalances[address(this)] >= amount, "Not enough cupcakes in stock to complete this purchase");
    cupcakeBalances[address(this)] -= amount;
    cupcakeBalances[msg.sender] += amount;
}

}

每次输入金额时，我都会收到错误消息“您必须为每个纸杯蛋糕支付至少 1 ETH”

我没有地方可以具体输入我要为此支付多少钱，任何帮助都会很好

here's what I'm able to input when I deploy the contract on Remix

Answer 1

部署按钮顶部您可以看到值字段：

当您想调用 purchase 时，首先填写值字段，然后 select Ether 调用您的函数。

我用你的代码尝试了这种方式，它工作正常。

如何在 Remix IDE 中设置 msg.value

How to set msg.value in Remix IDE

solidity

remix

ether