30 lines
828 B
Solidity
30 lines
828 B
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.7.0;
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interface ERC20Basic {
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function _totalSupply() external returns (uint256);
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function totalSupply() external view returns (uint256);
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function balanceOf(address who) external view returns (uint256);
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function transfer(address to, uint256 value) external;
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event Transfer(address indexed from, address indexed to, uint256 value);
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}
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/**
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* @title ERC20 interface
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* @dev see https://github.com/ethereum/EIPs/issues/20
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*/
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interface IUSDT is ERC20Basic {
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function allowance(address owner, address spender) external view returns (uint256);
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function transferFrom(address from, address to, uint256 value) external;
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function approve(address spender, uint256 value) external;
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event Approval(address indexed owner, address indexed spender, uint256 value);
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}
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