{
    "Function": "swapByQuote",
    "File": "contracts/swap/Swap.sol",
    "Parent Contracts": [
        "node_modules/@openzeppelin/contracts/security/ReentrancyGuard.sol",
        "contracts/governance/EmergencyPausable.sol",
        "node_modules/@openzeppelin/contracts/security/Pausable.sol",
        "contracts/governance/EmergencyGovernable.sol",
        "node_modules/@openzeppelin/contracts/access/Ownable.sol",
        "node_modules/@openzeppelin/contracts/utils/Context.sol"
    ],
    "High-Level Calls": [
        "SafeMath",
        "SafeERC20",
        "SafeERC20",
        "SafeMath",
        "SafeMath",
        "SafeMath",
        "SafeMath",
        "SafeMath",
        "SafeMath",
        "SafeERC20",
        "SafeMath",
        "SafeERC20"
    ],
    "Internal Calls": [
        "require(bool,string)",
        "require(bool,string)",
        "signifiesETHOrZero",
        "require(bool,string)",
        "fillZrxQuote",
        "signifiesETHOrZero",
        "whenNotPaused",
        "signifiesETHOrZero",
        "nonReentrant"
    ],
    "Library Calls": [
        "safeIncreaseAllowance",
        "sub",
        "safeTransfer",
        "safeApprove",
        "mul",
        "div",
        "div",
        "sub",
        "sub",
        "sub",
        "mul",
        "safeTransferFrom"
    ],
    "Low-Level Calls": [],
    "Code": "function swapByQuote(\n        address zrxSellTokenAddress,\n        uint256 amountToSell,\n        address zrxBuyTokenAddress,\n        uint256 minimumAmountReceived,\n        address zrxAllowanceTarget,\n        address payable zrxTo,\n        bytes calldata zrxData,\n        uint256 deadline\n    ) external payable whenNotPaused nonReentrant {\n        require(\n            block.timestamp <= deadline,\n            \"Swap::swapByQuote: Deadline exceeded\"\n        );\n        require(\n            !signifiesETHOrZero(zrxSellTokenAddress) || msg.value > 0,\n            \"Swap::swapByQuote: Unwrapped ETH must be swapped via msg.value\"\n        );\n\n        // if zrxAllowanceTarget is 0, this is an ETH sale\n        if (zrxAllowanceTarget != address(0)) {\n            // transfer tokens to this contract\n            IERC20(zrxSellTokenAddress).safeTransferFrom(msg.sender, address(this), amountToSell);\n            // approve token transfer to 0x contracts\n            // TODO (handle approval special cases like USDT, KNC, etc)\n            IERC20(zrxSellTokenAddress).safeIncreaseAllowance(zrxAllowanceTarget, amountToSell);\n        }\n\n        // execute 0x quote\n        (uint256 boughtERC20Amount, uint256 boughtETHAmount) = fillZrxQuote(\n            IERC20(zrxBuyTokenAddress),\n            zrxTo,\n            zrxData,\n            msg.value\n        );\n\n        require(\n            (\n                !signifiesETHOrZero(zrxBuyTokenAddress) &&\n                boughtERC20Amount >= minimumAmountReceived\n            ) ||\n            (\n                signifiesETHOrZero(zrxBuyTokenAddress) &&\n                boughtETHAmount >= minimumAmountReceived\n            ),\n            \"Swap::swapByQuote: Minimum swap proceeds requirement not met\"\n        );\n        if (boughtERC20Amount > 0) {\n            // take the swap fee from the ERC20 proceeds and return the rest\n            uint256 toTransfer = SWAP_FEE_DIVISOR.sub(swapFee).mul(boughtERC20Amount).div(SWAP_FEE_DIVISOR);\n            IERC20(zrxBuyTokenAddress).safeTransfer(msg.sender, toTransfer);\n            // return any refunded ETH\n            payable(msg.sender).transfer(boughtETHAmount);\n\n            emit SwappedTokens(\n                zrxSellTokenAddress,\n                zrxBuyTokenAddress,\n                amountToSell,\n                boughtERC20Amount,\n                boughtERC20Amount.sub(toTransfer)\n            );\n        } else {\n\n            // take the swap fee from the ETH proceeds and return the rest. Note\n            // that if any 0x protocol fee is refunded in ETH, it also suffers\n            // the swap fee tax\n            uint256 toTransfer = SWAP_FEE_DIVISOR.sub(swapFee).mul(boughtETHAmount).div(SWAP_FEE_DIVISOR);\n            payable(msg.sender).transfer(toTransfer);\n            emit SwappedTokens(\n                zrxSellTokenAddress,\n                zrxBuyTokenAddress,\n                amountToSell,\n                boughtETHAmount,\n                boughtETHAmount.sub(toTransfer)\n            );\n        }\n        if (zrxAllowanceTarget != address(0)) {\n            // remove any dangling token allowance\n            IERC20(zrxSellTokenAddress).safeApprove(zrxAllowanceTarget, 0);\n        }\n    }"
}