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2022-07-27 19:55:55 +00:00
parent 0e33f67bd8
commit 08c3b2b156
25 changed files with 192 additions and 142 deletions
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18
contracts/utils/introspection/ERC165Checker.sol
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@ -1,5 +1,5 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.1) (utils/introspection/ERC165Checker.sol)
// OpenZeppelin Contracts (last updated v4.7.2) (utils/introspection/ERC165Checker.sol)
pragma solidity ^0.8.0;
@ -105,9 +105,19 @@ library ERC165Checker {
* Interface identification is specified in ERC-165.
*/
function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) {
// prepare call
bytes memory encodedParams = abi.encodeWithSelector(IERC165.supportsInterface.selector, interfaceId);
(bool success, bytes memory result) = account.staticcall{gas: 30000}(encodedParams);
if (result.length < 32) return false;
return success && abi.decode(result, (uint256)) > 0;
// perform static call
bool success;
uint256 returnSize;
uint256 returnValue;
assembly {
success := staticcall(30000, account, add(encodedParams, 0x20), mload(encodedParams), 0x00, 0x20)
returnSize := returndatasize()
returnValue := mload(0x00)
}
return success && returnSize >= 0x20 && returnValue > 0;
}
}