以太坊合约分析之远程购买



以太坊合约分析之远程购买

支付宝在交易中起到信用中介的作用，避免用户钱货两空。虽然支付宝主要是保护了用户方的利益，但是支付宝会从商家店铺收取租金，羊毛出在羊身上，商家再将这笔费用隐形的转给用户。

现在有了以太坊，支付宝作为信用中介的功用就可以被区块链合约所取代。我们看下面这个简单的买卖合约代码。


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