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0xC586BeF4a0992C495Cf22e1aeEE4E446CECDee0E
 

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170865882023-04-20 8:39:11593 days ago1681979951
0xC586BeF4...6CECDee0E
0.01 ETH
170256802023-04-11 15:16:35601 days ago1681226195
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170242392023-04-11 10:23:23602 days ago1681208603
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169890032023-04-06 10:29:11607 days ago1680776951
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130526702021-08-19 1:20:171202 days ago1629336017
0xC586BeF4...6CECDee0E
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130494052021-08-18 13:09:001202 days ago1629292140
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1.31302512 ETH
130494052021-08-18 13:09:001202 days ago1629292140
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1.31302512 ETH
128803732021-07-23 4:02:191229 days ago1627012939
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4.85673 ETH
128747012021-07-22 6:58:401230 days ago1626937120
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0.05 ETH
128660662021-07-20 22:18:591231 days ago1626819539
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0.00119744 ETH
128660422021-07-20 22:14:141231 days ago1626819254
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0.00154731 ETH
128191932021-07-13 13:59:261238 days ago1626184766
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2.8737198 ETH
128191542021-07-13 13:53:021238 days ago1626184382
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3.30422854 ETH
128191542021-07-13 13:53:021238 days ago1626184382
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3.30422854 ETH
128190122021-07-13 13:20:391238 days ago1626182439
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8.74887649 ETH
128190122021-07-13 13:20:391238 days ago1626182439
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8.74887649 ETH
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35.060093 ETH
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35.060093 ETH
128189882021-07-13 13:13:551238 days ago1626182035
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4.66635776 ETH
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4.66635776 ETH
128189762021-07-13 13:11:191238 days ago1626181879
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4.97734818 ETH
128189762021-07-13 13:11:191238 days ago1626181879
0xC586BeF4...6CECDee0E
4.97734818 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
OneSplitAudit

Compiler Version
v0.5.17+commit.d19bba13

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2020-03-31
*/

// File: @openzeppelin/contracts/GSN/Context.sol

pragma solidity ^0.5.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
contract Context {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

    function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File: @openzeppelin/contracts/ownership/Ownable.sol

pragma solidity ^0.5.0;

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(isOwner(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Returns true if the caller is the current owner.
     */
    function isOwner() public view returns (bool) {
        return _msgSender() == _owner;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol

pragma solidity ^0.5.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// File: contracts/IOneSplit.sol

pragma solidity ^0.5.0;



contract IOneSplitView {
    // disableFlags = FLAG_DISABLE_UNISWAP + FLAG_DISABLE_KYBER + ...
    uint256 public constant FLAG_DISABLE_UNISWAP = 0x01;
    uint256 public constant FLAG_DISABLE_KYBER = 0x02;
    uint256 public constant FLAG_ENABLE_KYBER_UNISWAP_RESERVE = 0x100000000; // Turned off by default
    uint256 public constant FLAG_ENABLE_KYBER_OASIS_RESERVE = 0x200000000; // Turned off by default
    uint256 public constant FLAG_ENABLE_KYBER_BANCOR_RESERVE = 0x400000000; // Turned off by default
    uint256 public constant FLAG_DISABLE_BANCOR = 0x04;
    uint256 public constant FLAG_DISABLE_OASIS = 0x08;
    uint256 public constant FLAG_DISABLE_COMPOUND = 0x10;
    uint256 public constant FLAG_DISABLE_FULCRUM = 0x20;
    uint256 public constant FLAG_DISABLE_CHAI = 0x40;
    uint256 public constant FLAG_DISABLE_AAVE = 0x80;
    uint256 public constant FLAG_DISABLE_SMART_TOKEN = 0x100;
    uint256 public constant FLAG_ENABLE_MULTI_PATH_ETH = 0x200; // Turned off by default
    uint256 public constant FLAG_DISABLE_BDAI = 0x400;
    uint256 public constant FLAG_DISABLE_IEARN = 0x800;
    uint256 public constant FLAG_DISABLE_CURVE_COMPOUND = 0x1000;
    uint256 public constant FLAG_DISABLE_CURVE_USDT = 0x2000;
    uint256 public constant FLAG_DISABLE_CURVE_Y = 0x4000;
    uint256 public constant FLAG_DISABLE_CURVE_BINANCE = 0x8000;
    uint256 public constant FLAG_ENABLE_MULTI_PATH_DAI = 0x10000; // Turned off by default
    uint256 public constant FLAG_ENABLE_MULTI_PATH_USDC = 0x20000; // Turned off by default
    uint256 public constant FLAG_DISABLE_CURVE_SYNTHETIX = 0x40000;
    uint256 public constant FLAG_DISABLE_WETH = 0x80000;
    uint256 public constant FLAG_ENABLE_UNISWAP_COMPOUND = 0x100000; // Works only with FLAG_ENABLE_MULTI_PATH_ETH

    function getExpectedReturn(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 amount,
        uint256 parts,
        uint256 disableFlags
    )
        public
        view
        returns(
            uint256 returnAmount,
            uint256[] memory distribution
        );
}


contract IOneSplit is IOneSplitView {
    function swap(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 amount,
        uint256 minReturn,
        uint256[] memory distribution,
        uint256 disableFlags
    ) public payable;
}

// File: @openzeppelin/contracts/math/SafeMath.sol

pragma solidity ^0.5.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: @openzeppelin/contracts/utils/Address.sol

pragma solidity ^0.5.5;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following 
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

    /**
     * @dev Converts an `address` into `address payable`. Note that this is
     * simply a type cast: the actual underlying value is not changed.
     *
     * _Available since v2.4.0._
     */
    function toPayable(address account) internal pure returns (address payable) {
        return address(uint160(account));
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     *
     * _Available since v2.4.0._
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-call-value
        (bool success, ) = recipient.call.value(amount)("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
}

// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol

pragma solidity ^0.5.0;




/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves.

        // A Solidity high level call has three parts:
        //  1. The target address is checked to verify it contains contract code
        //  2. The call itself is made, and success asserted
        //  3. The return value is decoded, which in turn checks the size of the returned data.
        // solhint-disable-next-line max-line-length
        require(address(token).isContract(), "SafeERC20: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = address(token).call(data);
        require(success, "SafeERC20: low-level call failed");

        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// File: contracts/UniversalERC20.sol

pragma solidity ^0.5.0;





library UniversalERC20 {

    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    IERC20 private constant ZERO_ADDRESS = IERC20(0x0000000000000000000000000000000000000000);
    IERC20 private constant ETH_ADDRESS = IERC20(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);

    function universalTransfer(IERC20 token, address to, uint256 amount) internal returns(bool) {
        if (amount == 0) {
            return true;
        }

        if (isETH(token)) {
            address(uint160(to)).transfer(amount);
        } else {
            token.safeTransfer(to, amount);
            return true;
        }
    }

    function universalTransferFrom(IERC20 token, address from, address to, uint256 amount) internal {
        if (amount == 0) {
            return;
        }

        if (isETH(token)) {
            require(from == msg.sender && msg.value >= amount, "Wrong useage of ETH.universalTransferFrom()");
            if (to != address(this)) {
                address(uint160(to)).transfer(amount);
            }
            if (msg.value > amount) {
                msg.sender.transfer(msg.value.sub(amount));
            }
        } else {
            token.safeTransferFrom(from, to, amount);
        }
    }

    function universalTransferFromSenderToThis(IERC20 token, uint256 amount) internal {
        if (amount == 0) {
            return;
        }

        if (isETH(token)) {
            if (msg.value > amount) {
                // Return remainder if exist
                msg.sender.transfer(msg.value.sub(amount));
            }
        } else {
            token.safeTransferFrom(msg.sender, address(this), amount);
        }
    }

    function universalApprove(IERC20 token, address to, uint256 amount) internal {
        if (!isETH(token)) {
            if (amount > 0 && token.allowance(address(this), to) > 0) {
                token.safeApprove(to, 0);
            }
            token.safeApprove(to, amount);
        }
    }

    function universalBalanceOf(IERC20 token, address who) internal view returns (uint256) {
        if (isETH(token)) {
            return who.balance;
        } else {
            return token.balanceOf(who);
        }
    }

    function universalDecimals(IERC20 token) internal view returns (uint256) {

        if (isETH(token)) {
            return 18;
        }

        (bool success, bytes memory data) = address(token).staticcall.gas(10000)(
            abi.encodeWithSignature("decimals()")
        );
        if (!success || data.length == 0) {
            (success, data) = address(token).staticcall.gas(10000)(
                abi.encodeWithSignature("DECIMALS()")
            );
        }

        return (success && data.length > 0) ? abi.decode(data, (uint256)) : 18;
    }

    function isETH(IERC20 token) internal pure returns(bool) {
        return (address(token) == address(ZERO_ADDRESS) || address(token) == address(ETH_ADDRESS));
    }
}

// File: contracts/OneSplitAudit.sol

pragma solidity ^0.5.0;





//
// Security assumptions:
// 1. It is safe to have infinite approves of any tokens to this smart contract,
//    since it could only call `transferFrom()` with first argument equal to msg.sender
// 2. It is safe to call `swap()` with reliable `minReturn` argument,
//    if returning amount will not reach `minReturn` value whole swap will be reverted.
//
contract OneSplitAudit is IOneSplit, Ownable {

    using SafeMath for uint256;
    using UniversalERC20 for IERC20;

    IOneSplit public oneSplitImpl;

    event ImplementationUpdated(address indexed newImpl);

    constructor(IOneSplit impl) public {
        setNewImpl(impl);
    }

    function() external payable {
        require(msg.sender != tx.origin, "OneSplit: do not send ETH directly");
    }

    function setNewImpl(IOneSplit impl) public onlyOwner {
        oneSplitImpl = impl;
        emit ImplementationUpdated(address(impl));
    }

    /// @notice Calculate expected returning amount of `toToken`
    /// @param fromToken (IERC20) Address of token or `address(0)` for Ether
    /// @param toToken (IERC20) Address of token or `address(0)` for Ether
    /// @param amount (uint256) Amount for `fromToken`
    /// @param parts (uint256) Number of pieces source volume could be splitted,
    /// works like granularity, higly affects gas usage. Should be called offchain,
    /// but could be called onchain if user swaps not his own funds, but this is still considered as not safe.
    /// @param featureFlags (uint256) Flags for enabling and disabling some features, default 0
    function getExpectedReturn(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 amount,
        uint256 parts,
        uint256 featureFlags // See contants in IOneSplit.sol
    )
        public
        view
        returns(
            uint256 returnAmount,
            uint256[] memory distribution
        )
    {
        return oneSplitImpl.getExpectedReturn(
            fromToken,
            toToken,
            amount,
            parts,
            featureFlags
        );
    }

    /// @notice Swap `amount` of `fromToken` to `toToken`
    /// @param fromToken (IERC20) Address of token or `address(0)` for Ether
    /// @param toToken (IERC20) Address of token or `address(0)` for Ether
    /// @param amount (uint256) Amount for `fromToken`
    /// @param minReturn (uint256) Minimum expected return, else revert
    /// @param distribution (uint256[]) Array of weights for volume distribution returned by `getExpectedReturn`
    /// @param featureFlags (uint256) Flags for enabling and disabling some features, default 0
    function swap(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 amount,
        uint256 minReturn,
        uint256[] memory distribution,
        uint256 featureFlags // See contants in IOneSplit.sol
    ) public payable {
        require(fromToken != toToken && amount > 0, "OneSplit: swap makes no sense");
        require((msg.value != 0) == fromToken.isETH(), "OneSplit: msg.value shoule be used only for ETH swap");

        uint256 fromTokenBalanceBefore = fromToken.universalBalanceOf(address(this)).sub(msg.value);
        uint256 toTokenBalanceBefore = toToken.universalBalanceOf(address(this));

        fromToken.universalTransferFromSenderToThis(amount);
        fromToken.universalApprove(address(oneSplitImpl), amount);

        oneSplitImpl.swap.value(msg.value)(
            fromToken,
            toToken,
            amount,
            minReturn,
            distribution,
            featureFlags
        );

        uint256 fromTokenBalanceAfter = fromToken.universalBalanceOf(address(this));
        uint256 toTokenBalanceAfter = toToken.universalBalanceOf(address(this));

        uint256 returnAmount = toTokenBalanceAfter.sub(toTokenBalanceBefore);
        require(returnAmount >= minReturn, "OneSplit: actual return amount is less than minReturn");
        toToken.universalTransfer(msg.sender, returnAmount);

        if (fromTokenBalanceAfter > fromTokenBalanceBefore) {
            fromToken.universalTransfer(msg.sender, fromTokenBalanceAfter.sub(fromTokenBalanceBefore));
        }
    }

    function claimAsset(IERC20 asset, uint256 amount) public onlyOwner {
        asset.universalTransfer(msg.sender, amount);
    }

    //
    // DEPRECATED: Implement in own contract if needed, but this is
    //             still should not be considered as safe oracle.
    //
    // function goodSwap(
    //     IERC20 fromToken,
    //     IERC20 toToken,
    //     uint256 amount,
    //     uint256 minReturn,
    //     uint256 parts,
    //     uint256 featureFlags // See contants in IOneSplit.sol
    // ) public payable {
    //     (, uint256[] memory distribution) = getExpectedReturn(
    //         fromToken,
    //         toToken,
    //         amount,
    //         parts,
    //         featureFlags
    //     );
    //     swap(
    //         fromToken,
    //         toToken,
    //         amount,
    //         minReturn,
    //         distribution,
    //         featureFlags
    //     );
    // }
}

Contract Security Audit

Contract ABI

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IOneSplit","name":"impl","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"newImpl","type":"address"}],"name":"ImplementationUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_AAVE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_BANCOR","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_BDAI","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_CHAI","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_COMPOUND","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_CURVE_BINANCE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_CURVE_COMPOUND","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_CURVE_SYNTHETIX","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_CURVE_USDT","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_CURVE_Y","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_FULCRUM","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_IEARN","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_KYBER","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_OASIS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_SMART_TOKEN","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_UNISWAP","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_DISABLE_WETH","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_ENABLE_KYBER_BANCOR_RESERVE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_ENABLE_KYBER_OASIS_RESERVE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_ENABLE_KYBER_UNISWAP_RESERVE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_ENABLE_MULTI_PATH_DAI","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_ENABLE_MULTI_PATH_ETH","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_ENABLE_MULTI_PATH_USDC","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"FLAG_ENABLE_UNISWAP_COMPOUND","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"contract 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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000610812dd88e0caf372e2056103bdb9c76a4547e5

-----Decoded View---------------
Arg [0] : impl (address): 0x610812dd88E0caf372E2056103BDB9c76a4547E5

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000610812dd88e0caf372e2056103bdb9c76a4547e5


Deployed Bytecode Sourcemap

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Swarm Source

bzzr://ce9439a0341a28165836353f2bb240c024d41f45c4a6fc6bd9843b97953c92b6

Block Transaction Difficulty Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.