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21 lines
605 B
21 lines
605 B
pragma solidity ^0.4.18;
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/**
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* Utility library of inline functions on addresses
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*/
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library AddressUtils {
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/**
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* Returns whether there is code in the target address
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* @dev This function will return false if invoked during the constructor of a contract,
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* as the code is not actually created until after the constructor finishes.
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* @param addr address address to check
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* @return whether there is code in the target address
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*/
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function isContract(address addr) internal view returns (bool) {
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uint256 size;
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assembly { size := extcodesize(addr) }
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return size > 0;
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}
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}
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