2.8TRX
2.8TRX = 1 有笔转账（对方U)
5.6TRX = 1 笔转账（对方无U
TNZ4DERAYTQQx5HQLQtsJSQpHh2deXWi5y
（向上方地址转 2.8TRX USDT
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10分钟内有效
完全由代码的驱动交割方式，买卖双方的资产在合约触发条件满足时瞬间完成互换，消除了传统中心化交易的违约风险。
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