safe-apps-sdk/src/safe/signatures.ts

SDK developed to integrate third-party apps with Safe app.

import { ethers } from 'ethers';

const MAGIC_VALUE = '0x1626ba7e';
const MAGIC_VALUE_BYTES = '0x20c13b0b';

const EIP_1271_INTERFACE = new ethers.utils.Interface([
  'function isValidSignature(bytes32 _dataHash, bytes calldata _signature) external view',
]);
const EIP_1271_BYTES_INTERFACE = new ethers.utils.Interface([
  'function isValidSignature(bytes calldata _data, bytes calldata _signature) public view',
]);

export { EIP_1271_INTERFACE, EIP_1271_BYTES_INTERFACE, MAGIC_VALUE, MAGIC_VALUE_BYTES };