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- // SPDX-License-Identifier: MIT
- pragma solidity ^0.8.20;
- /**
- * @dev Abstract contract for signature validation.
- *
- * Developers must implement {_rawSignatureValidation} and use it as the lowest-level signature validation mechanism.
- *
- * @custom:stateless
- */
- abstract contract AbstractSigner {
- /**
- * @dev Signature validation algorithm.
- *
- * WARNING: Implementing a signature validation algorithm is a security-sensitive operation as it involves
- * cryptographic verification. It is important to review and test thoroughly before deployment. Consider
- * using one of the signature verification libraries (xref:api:utils/cryptography#ECDSA[ECDSA],
- * xref:api:utils/cryptography#P256[P256] or xref:api:utils/cryptography#RSA[RSA]).
- */
- function _rawSignatureValidation(bytes32 hash, bytes calldata signature) internal view virtual returns (bool);
- }
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