```\\nfunction tryRecover(\\n       bytes32 hash,\\n       uint8 v,\\n       bytes32 r,\\n       bytes32 s\\n   ) internal pure returns (address, RecoverError) {\\n       // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature\\n       // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines\\n       // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most\\n       // signatures from current libraries generate a unique signature with an s-value in the lower half order.\\n       //\\n       // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value\\n       // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or\\n       // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept\\n       // these malleable signatures as well.\\n       if (\\n           uint256(s) >\\n           0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0\\n       ) {\\n           return (address(0), RecoverError.InvalidSignatureS);\\n       }\\n\\n       // If the signature is valid (and not malleable), return the signer address\\n       address signer = ecrecover(hash, v, r, s);\\n       if (signer == address(0)) {\\n           return (address(0), RecoverError.InvalidSignature);\\n       }\\n\\n       return (signer, RecoverError.NoError);\\n   }\\n\\n\\n```\\n