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SablierMerkleSignature

Git Source

Inherits: ISablierMerkleSignature, SablierMerkleBase

Title: SablierMerkleSignature

See the documentation in ISablierMerkleSignature.

State Variables​

_CACHED_CHAIN_ID​

Cache the chain ID in order to invalidate the cached domain separator if the chain ID changes in case of a chain split.

uint256 private immutable _CACHED_CHAIN_ID

_CACHED_DOMAIN_SEPARATOR​

The domain separator, as required by EIP-712 and EIP-1271, used for signing claim to prevent replay attacks across different campaigns.

bytes32 private immutable _CACHED_DOMAIN_SEPARATOR

_attestor​

A private variable to store the attestor address if set after the contract is deployed. If zero, the attestor is queried from the comptroller.

address private _attestor

Functions​

constructor​

Constructs the contract by initializing the immutable state variables.

constructor() ;

attestor​

Retrieves the attestor address used for creating attestation signatures.

function attestor() external view override returns (address);

domainSeparator​

The domain separator, as required by EIP-712 and EIP-1271, used for signing claims to prevent replay attacks across different campaigns.

function domainSeparator() external view override returns (bytes32);

setAttestor​

Sets the attestor address used for verifying attestation signatures.

Emits a {SetAttestor} event. Requirements:

  • msg.sender must be either the comptroller or the campaign admin.
function setAttestor(address newAttestor) external override;

Parameters

NameTypeDescription
newAttestoraddressThe new attestor address. If zero, the attestor from the comptroller will be used.

_verifyAttestationSignature​

Verifies that the attestation signature created for the recipient is signed by the attestor. It supports both EIP-712 and EIP-1271 signatures.

function _verifyAttestationSignature(address recipient, uint40 expireAt, bytes calldata signature) internal view;

_verifyClaimSignature​

Verifies that the claim signature is signed by the recipient. It supports both EIP-712 and EIP-1271 signatures.

function _verifyClaimSignature(
    uint256 index,
    address recipient,
    address to,
    uint128 amount,
    uint40 validFrom,
    bytes calldata signature
)
    internal
    view;

_domainSeparator​

Returns the domain separator for the current chain.

function _domainSeparator() private view returns (bytes32);

_getAttestor​

Returns the attestor address.

function _getAttestor() private view returns (address);

_verifySignature​

Verifies that the EIP-712 or EIP-1271 signature is signed by the expected signer.

function _verifySignature(address signer, bytes32 structHash, bytes calldata signature) private view;