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allowance
2024-10-09
ERC20智能合约demo
ERC20智能合约demoERC20.solIERC20.solERC20.sol//SPDX-License-Identifier:MITpragmasolidity^0.8.20;import{IERC20}from"./IERC20.sol";contractERC20isIERC20{mapping(address=>uint256)publicoverridebalanceOf; mapping(address