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27 lines
675 B
27 lines
675 B
3 years ago
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interface IERC20 {
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function decimals() external view returns (uint8);
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}
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library MyLibrary {
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function aViewCall(address token) internal view {
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(bool success , ) = token.staticcall(
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abi.encodeWithSelector(IERC20.decimals.selector)
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);
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require(success, "call failed");
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}
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}
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contract A {
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uint256 private protectMe = 1;
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function good() external {
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MyLibrary.aViewCall(0x6B175474E89094C44Da98b954EedeAC495271d0F);
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protectMe += 1;
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}
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function good1() external {
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(bool success,) = address(MyLibrary).staticcall(abi.encodeWithSignature("aViewCall(address)"));
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require(success, "call failed");
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protectMe += 1;
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}
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}
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