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我试图了解如何为下面链接的屏幕截图中的示例计算以太坊代币余额。流入和流出之和不等于 0，但余额显示为 0。我使用 web3 验证了余额，它确实显示为 0。为什么在这种情况下余额为 0？
etherscan 代币转账
etherscan "读取合约" balanceOf
