{
    "Function": "slitherConstructorConstantVariables",
    "File": "src/token/ERC20.sol",
    "Parent Contracts": [
        "src/util/Context.sol"
    ],
    "High-Level Calls": [],
    "Internal Calls": [
        "keccak256(bytes)"
    ],
    "Library Calls": [],
    "Low-Level Calls": [],
    "Code": "contract ERC20 is Context {\n    mapping(address => uint256) public wards;\n\n    string public name;\n    string public symbol;\n    string public constant version = \"3\";\n    uint8 public immutable decimals;\n    uint256 public totalSupply;\n\n    mapping(address => uint256) public balanceOf;\n    mapping(address => mapping(address => uint256)) public allowance;\n    mapping(address => uint256) public nonces;\n\n    // --- EIP712 niceties ---\n    uint256 public immutable deploymentChainId;\n    bytes32 private immutable _DOMAIN_SEPARATOR;\n    bytes32 public constant PERMIT_TYPEHASH =\n        keccak256(\"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\");\n\n    // --- Events ---\n    event Rely(address indexed user);\n    event Deny(address indexed user);\n    event File(bytes32 indexed what, string data);\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    constructor(uint8 decimals_) {\n        decimals = decimals_;\n        wards[_msgSender()] = 1;\n        emit Rely(_msgSender());\n\n        deploymentChainId = block.chainid;\n        _DOMAIN_SEPARATOR = _calculateDomainSeparator(block.chainid);\n    }\n\n    modifier auth() {\n        // Custom auth modifier that uses _msgSender()\n        require(wards[_msgSender()] == 1, \"Auth/not-authorized\");\n        _;\n    }\n\n    function rely(address user) external auth {\n        wards[user] = 1;\n        emit Rely(user);\n    }\n\n    function deny(address user) external auth {\n        wards[user] = 0;\n        emit Deny(user);\n    }\n\n    function _calculateDomainSeparator(uint256 chainId) private view returns (bytes32) {\n        return keccak256(\n            abi.encode(\n                keccak256(\"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)\"),\n                keccak256(bytes(name)),\n                keccak256(bytes(version)),\n                chainId,\n                address(this)\n            )\n        );\n    }\n\n    function DOMAIN_SEPARATOR() external view returns (bytes32) {\n        return block.chainid == deploymentChainId ? _DOMAIN_SEPARATOR : _calculateDomainSeparator(block.chainid);\n    }\n\n    function file(bytes32 what, string memory data) external auth {\n        if (what == \"name\") name = data;\n        else if (what == \"symbol\") symbol = data;\n        else revert(\"ERC20/file-unrecognized-param\");\n        emit File(what, data);\n    }\n\n    // --- ERC20 Mutations ---\n    function transfer(address to, uint256 value) public virtual returns (bool) {\n        require(to != address(0) && to != address(this), \"ERC20/invalid-address\");\n        uint256 balance = balanceOf[_msgSender()];\n        require(balance >= value, \"ERC20/insufficient-balance\");\n\n        unchecked {\n            balanceOf[_msgSender()] = balance - value;\n            balanceOf[to] += value;\n        }\n\n        emit Transfer(_msgSender(), to, value);\n\n        return true;\n    }\n\n    function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {\n        require(to != address(0) && to != address(this), \"ERC20/invalid-address\");\n        uint256 balance = balanceOf[from];\n        require(balance >= value, \"ERC20/insufficient-balance\");\n\n        if (from != _msgSender()) {\n            uint256 allowed = allowance[from][_msgSender()];\n            if (allowed != type(uint256).max) {\n                require(allowed >= value, \"ERC20/insufficient-allowance\");\n                unchecked {\n                    allowance[from][_msgSender()] = allowed - value;\n                }\n            }\n        }\n\n        unchecked {\n            balanceOf[from] = balance - value;\n            balanceOf[to] += value;\n        }\n\n        emit Transfer(from, to, value);\n\n        return true;\n    }\n\n    function approve(address spender, uint256 value) external returns (bool) {\n        allowance[_msgSender()][spender] = value;\n\n        emit Approval(_msgSender(), spender, value);\n\n        return true;\n    }\n\n    function increaseAllowance(address spender, uint256 addedValue) external returns (bool) {\n        uint256 newValue = allowance[_msgSender()][spender] + addedValue;\n        allowance[_msgSender()][spender] = newValue;\n\n        emit Approval(_msgSender(), spender, newValue);\n\n        return true;\n    }\n\n    function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool) {\n        uint256 allowed = allowance[_msgSender()][spender];\n        require(allowed >= subtractedValue, \"ERC20/insufficient-allowance\");\n        unchecked {\n            allowed = allowed - subtractedValue;\n        }\n        allowance[_msgSender()][spender] = allowed;\n\n        emit Approval(_msgSender(), spender, allowed);\n\n        return true;\n    }\n\n    // --- Mint/Burn ---\n    function mint(address to, uint256 value) public virtual auth {\n        require(to != address(0) && to != address(this), \"ERC20/invalid-address\");\n        unchecked {\n            balanceOf[to] = balanceOf[to] + value; // note: we don't need an overflow check here b/c balanceOf[to] <= totalSupply and there is an overflow check below\n        }\n        totalSupply = totalSupply + value;\n\n        emit Transfer(address(0), to, value);\n    }\n\n    function burn(address from, uint256 value) external auth {\n        uint256 balance = balanceOf[from];\n        require(balance >= value, \"ERC20/insufficient-balance\");\n\n        if (from != _msgSender()) {\n            uint256 allowed = allowance[from][_msgSender()];\n            if (allowed != type(uint256).max) {\n                require(allowed >= value, \"ERC20/insufficient-allowance\");\n\n                unchecked {\n                    allowance[from][_msgSender()] = allowed - value;\n                }\n            }\n        }\n\n        unchecked {\n            balanceOf[from] = balance - value; // note: we don't need overflow checks b/c require(balance >= value) and balance <= totalSupply\n            totalSupply = totalSupply - value;\n        }\n\n        emit Transfer(from, address(0), value);\n    }\n\n    // --- Approve by signature ---\n    function _isValidSignature(address signer, bytes32 digest, bytes memory signature) internal view returns (bool) {\n        if (signature.length == 65) {\n            bytes32 r;\n            bytes32 s;\n            uint8 v;\n            assembly {\n                r := mload(add(signature, 0x20))\n                s := mload(add(signature, 0x40))\n                v := byte(0, mload(add(signature, 0x60)))\n            }\n            if (signer == ecrecover(digest, v, r, s)) {\n                return true;\n            }\n        }\n\n        (bool success, bytes memory result) =\n            signer.staticcall(abi.encodeWithSelector(IERC1271.isValidSignature.selector, digest, signature));\n        return (success && result.length == 32 && abi.decode(result, (bytes4)) == IERC1271.isValidSignature.selector);\n    }\n\n    function permit(address owner, address spender, uint256 value, uint256 deadline, bytes memory signature) public {\n        require(block.timestamp <= deadline, \"ERC20/permit-expired\");\n        require(owner != address(0), \"ERC20/invalid-owner\");\n\n        uint256 nonce;\n        unchecked {\n            nonce = nonces[owner]++;\n        }\n\n        bytes32 digest = keccak256(\n            abi.encodePacked(\n                \"\\x19\\x01\",\n                block.chainid == deploymentChainId ? _DOMAIN_SEPARATOR : _calculateDomainSeparator(block.chainid),\n                keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonce, deadline))\n            )\n        );\n\n        require(_isValidSignature(owner, digest, signature), \"ERC20/invalid-permit\");\n\n        allowance[owner][spender] = value;\n        emit Approval(owner, spender, value);\n    }\n\n    function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s)\n        external\n    {\n        permit(owner, spender, value, deadline, abi.encodePacked(r, s, v));\n    }\n}"
}