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14 lines
486 B
14 lines
486 B
2 years ago
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// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.0;
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import "../../token/ERC20/ERC20.sol";
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// contract that replicate USDT (0xdac17f958d2ee523a2206206994597c13d831ec7) approval beavior
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abstract contract ERC20ForceApproveMock is ERC20 {
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function approve(address spender, uint256 amount) public virtual override returns (bool) {
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require(amount == 0 || allowance(msg.sender, spender) == 0, "USDT approval failure");
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return super.approve(spender, amount);
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}
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}
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