Transpile 7bce2b72

contracts/utils/cryptography/SignatureCheckerUpgradeable.sol

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+// SPDX-License-Identifier: MIT
+// OpenZeppelin Contracts v4.4.1 (utils/cryptography/SignatureChecker.sol)
+
+pragma solidity ^0.8.0;
+
+import "./ECDSAUpgradeable.sol";
+import "../AddressUpgradeable.sol";
+import "../../interfaces/IERC1271Upgradeable.sol";
+
+/**
+ * @dev Signature verification helper: Provide a single mechanism to verify both private-key (EOA) ECDSA signature and
+ * ERC1271 contract signatures. Using this instead of ECDSA.recover in your contract will make them compatible with
+ * smart contract wallets such as Argent and Gnosis.
+ *
+ * Note: unlike ECDSA signatures, contract signature's are revocable, and the outcome of this function can thus change
+ * through time. It could return true at block N and false at block N+1 (or the opposite).
+ *
+ * _Available since v4.1._
+ */
+library SignatureCheckerUpgradeable {
+    function isValidSignatureNow(
+        address signer,
+        bytes32 hash,
+        bytes memory signature
+    ) internal view returns (bool) {
+        (address recovered, ECDSAUpgradeable.RecoverError error) = ECDSAUpgradeable.tryRecover(hash, signature);
+        if (error == ECDSAUpgradeable.RecoverError.NoError && recovered == signer) {
+            return true;
+        }
+
+        (bool success, bytes memory result) = signer.staticcall(
+            abi.encodeWithSelector(IERC1271Upgradeable.isValidSignature.selector, hash, signature)
+        );
+        return (success && result.length == 32 && abi.decode(result, (bytes4)) == IERC1271Upgradeable.isValidSignature.selector);
+    }
+}