{
    "Function": "decreaseAllowance",
    "File": "contracts/peripheral_contracts/ERC20.sol",
    "Parent Contracts": [
        "contracts/peripheral_contracts/IERC20.sol",
        "node_modules/@openzeppelin/contracts/utils/Context.sol"
    ],
    "High-Level Calls": [
        "SafeMath"
    ],
    "Internal Calls": [
        "_approve",
        "_msgSender",
        "_msgSender"
    ],
    "Library Calls": [
        "sub"
    ],
    "Low-Level Calls": [],
    "Code": "function decreaseAllowance(address spender, uint256 subtractedValue)\n        public\n        virtual\n        returns (bool)\n    {\n        _approve(\n            _msgSender(),\n            spender,\n            _allowances[_msgSender()][spender].sub(\n                subtractedValue,\n                \"ERC20: decreased allowance below zero\"\n            )\n        );\n        return true;\n    }"
}