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第三节问题 Mapping 问题 #100

@SongXianYang

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@SongXianYang

function fund() external payable {
require(convertEthToUsd(msg.value) >= MINIMUM_VALUE, "Send more ETH");
require(block.timestamp < deploymentTimestamp + lockTime, "window is closed");
fundersToAmount[msg.sender] = msg.value;
}

这个 fundersToAmount[msg.sender] = msg.value; 这个地方有问题 同一个合约账号 在多次支付eth的时候,只保留最后一次 支付的 msg.value

Image

如何解决:userToAountMap[msg.sender] += msg.value;

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