SignerERC7913

Inherits: AbstractSigner

*Implementation of {AbstractSigner} using https://eips.ethereum.org/EIPS/eip-7913[ERC-7913] signature verification. For {Account} usage, a {_setSigner} function is provided to set the ERC-7913 formatted {signer}. Doing so is easier for a factory, who is likely to use initializable clones of this contract. The signer is a bytes object that concatenates a verifier address and a key: verifier || key. Example of usage:

contract MyAccountERC7913 is Account, SignerERC7913, Initializable {
function initialize(bytes memory signer_) public initializer {
_setSigner(signer_);
}
function setSigner(bytes memory signer_) public onlyEntryPointOrSelf {
_setSigner(signer_);
}
}

IMPORTANT: Failing to call {_setSigner} either during construction (if used standalone) or during initialization (if used as a clone) may leave the signer either front-runnable or unusable.*

State Variables

_signer

bytes private _signer;

Functions

constructor

constructor(bytes memory signer_);

signer

Return the ERC-7913 signer (i.e. verifier || key).

function signer() public view virtual returns (bytes memory);

_setSigner

Sets the signer (i.e. verifier || key) with an ERC-7913 formatted signer.

function _setSigner(bytes memory signer_) internal;

_rawSignatureValidation

Verifies a signature using {SignatureChecker-isValidSignatureNow-bytes-bytes32-bytes-} with {signer}, hash and signature.

function _rawSignatureValidation(bytes32 hash, bytes calldata signature)
    internal
    view
    virtual
    override
    returns (bool);