{
    "Function": "permit",
    "File": "contracts/ERC20MetaTxUpgradeable.sol",
    "Parent Contracts": [
        "node_modules/@openzeppelin/contracts-upgradeable/utils/cryptography/EIP712Upgradeable.sol",
        "node_modules/@openzeppelin/contracts/interfaces/IERC5267.sol",
        "node_modules/@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol",
        "node_modules/@openzeppelin/contracts/interfaces/draft-IERC6093.sol",
        "node_modules/@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol",
        "node_modules/@openzeppelin/contracts/token/ERC20/IERC20.sol",
        "node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol",
        "node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"
    ],
    "High-Level Calls": [
        "ECDSA"
    ],
    "Internal Calls": [
        "revert DeadLineExpired(uint256)",
        "revert InvalidSignature()",
        "_hashTypedDataV4",
        "keccak256(bytes)",
        "_approve",
        "abi.encode()",
        "_useNonce"
    ],
    "Library Calls": [
        "recover"
    ],
    "Low-Level Calls": [],
    "Code": "function permit(\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) public virtual {\n        if (block.timestamp > deadline) revert DeadLineExpired(deadline);\n\n        bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));\n\n        bytes32 hash = _hashTypedDataV4(structHash);\n\n        address signer = ECDSA.recover(hash, v, r, s);\n        if (signer != owner) revert InvalidSignature();\n\n        _approve(owner, spender, value);\n    }"
}