2024-02-12 09:27:34 +00:00
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pragma solidity ^0.8.9;
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2024-01-31 12:04:44 +00:00
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/**
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* @dev Collection of functions related to the address type,
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*/
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library Address {
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/**
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* @dev Returns true if `account` is a contract.
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*
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* This test is non-exhaustive, and there may be false-negatives: during the
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* execution of a contract's constructor, its address will be reported as
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* not containing a contract.
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*
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* > It is unsafe to assume that an address for which this function returns
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* false is an externally-owned account (EOA) and not a contract.
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*/
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function isContract(address account) internal view returns (bool) {
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// This method relies in extcodesize, which returns 0 for contracts in
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// construction, since the code is only stored at the end of the
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// constructor execution.
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uint256 size;
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// solhint-disable-next-line no-inline-assembly
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assembly {
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size := extcodesize(account)
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}
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return size > 0;
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}
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}
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