iProtocol Finance - Smart Contract Audit Report

Summary

Void due to post-audit changes




iProtocol Finance Audit Report iProtocol is a token that utilizes fees from transactions and partially distributes them amongst the token holders. This sharing mechanism allows for all holders to receive rewards and for the supply of tokens to decrease; deflating the total supply and generating passive income.

The iProtocol team has introduced a backdoored mint fuction into the contract while this report was still in draft. Please excercise extreme caution.

Overview of contract:
  • iProtocol acts similar to `reflect.finance where users generate income in the form of tokens for just holding tokens. One major difference is the deflation feature that allows for the decreasing supply due to transfer fees.
  • No minting functions are present in the smart contract.

  • 4% of every transaction is taken as a fee and redistributed to existing token holders instantly and automatically, the owner has the ability to change the fee but can renounce ownership.
  • Users who sell their tokens will receive an extra 2% fee that is then locked in liquidity forever.
  • Once the total supply reaches 50,000 minimum, transfer fees will end.
  • The owner of the smart contract can update the fee percentage and can exclude any address from incurring fees.
  • Every transaction is charged a 0.5% fee that is burned to reduce the total supply, the burn feature stops when total supply reaches 50000 IYP.
  • Contract utilizes safe math libraries to prevent overflows.

Audit Findings Summary
  • No security issues were detected in the analysis.
  • Date: December 18th, 2020


Date: December 18th, 2020
Vulnerability CategoryNotesResult
Arbitrary Storage WriteN/APASS
Arbitrary JumpN/APASS
Delegate Call to Untrusted ContractN/APASS
Dependence on Predictable VariablesN/APASS
Deprecated OpcodesN/APASS
Ether ThiefN/APASS
ExceptionsN/APASS
External CallsN/APASS
Flash LoansN/APASS
Integer Over/UnderflowN/APASS
Multiple SendsN/APASS
OraclesN/APASS
SuicideN/APASS
State Change External CallsN/APass
Unchecked RetvalN/APASS
User Supplied AssertionN/APASS
Critical Solidity CompilerN/APASS
Overall Contract Safety PASS

ERC20 Token Graph

Multi-file Token

		
($) = payable function
 # = non-constant function
  

 +  Context 
    - [Int] _msgSender
    - [Int] _msgData

 + [Int] IERC20 
    - [Ext] totalSupply
    - [Ext] balanceOf
    - [Ext] transfer #
    - [Ext] allowance
    - [Ext] approve #
    - [Ext] transferFrom #

 + [Lib] SafeMath 
    - [Int] add
    - [Int] sub
    - [Int] sub
    - [Int] mul
    - [Int] div
    - [Int] div
    - [Int] mod
    - [Int] mod

 + [Lib] Address 
    - [Int] isContract
    - [Int] sendValue #
    - [Int] functionCall #
    - [Int] functionCall #
    - [Int] functionCallWithValue #
    - [Int] functionCallWithValue #
    - [Prv] _functionCallWithValue #

 +  Ownable (Context)
    - [Int]  #
    - [Pub] owner
    - [Pub] renounceOwnership #
       - modifiers: onlyOwner
    - [Pub] transferOwnership #
       - modifiers: onlyOwner

 + [Int] IUniswapV2Factory 
    - [Ext] feeTo
    - [Ext] feeToSetter
    - [Ext] getPair
    - [Ext] allPairs
    - [Ext] allPairsLength
    - [Ext] createPair #
    - [Ext] setFeeTo #
    - [Ext] setFeeToSetter #

 + [Int] IUniswapV2ERC20 
    - [Ext] name
    - [Ext] symbol
    - [Ext] decimals
    - [Ext] totalSupply
    - [Ext] balanceOf
    - [Ext] allowance
    - [Ext] approve #
    - [Ext] transfer #
    - [Ext] transferFrom #
    - [Ext] DOMAIN_SEPARATOR
    - [Ext] PERMIT_TYPEHASH
    - [Ext] nonces
    - [Ext] permit #

 + [Int] IUniswapV2Router01 
    - [Ext] factory
    - [Ext] WETH
    - [Ext] addLiquidity #
    - [Ext] addLiquidityETH ($)
    - [Ext] removeLiquidity #
    - [Ext] removeLiquidityETH #
    - [Ext] removeLiquidityWithPermit #
    - [Ext] removeLiquidityETHWithPermit #
    - [Ext] swapExactTokensForTokens #
    - [Ext] swapTokensForExactTokens #
    - [Ext] swapExactETHForTokens ($)
    - [Ext] swapTokensForExactETH #
    - [Ext] swapExactTokensForETH #
    - [Ext] swapETHForExactTokens ($)
    - [Ext] quote
    - [Ext] getAmountOut
    - [Ext] getAmountIn
    - [Ext] getAmountsOut
    - [Ext] getAmountsIn

 + [Int] IUniswapV2Router02 (IUniswapV2Router01)
    - [Ext] removeLiquidityETHSupportingFeeOnTransferTokens #
    - [Ext] removeLiquidityETHWithPermitSupportingFeeOnTransferTokens #
    - [Ext] swapExactTokensForTokensSupportingFeeOnTransferTokens #
    - [Ext] swapExactETHForTokensSupportingFeeOnTransferTokens ($)
    - [Ext] swapExactTokensForETHSupportingFeeOnTransferTokens #

 +  IProtocol (Context, IERC20, Ownable)
    - [Pub]  #
    - [Pub] name
    - [Pub] symbol
    - [Pub] decimals
    - [Pub] totalSupply
    - [Pub] balanceOf
    - [Pub] transfer #
    - [Pub] allowance
    - [Pub] approve #
    - [Pub] transferFrom #
    - [Pub] increaseAllowance #
    - [Pub] decreaseAllowance #
    - [Pub] isExcluded
    - [Pub] totalFees
    - [Pub] totalBurn
    - [Pub] deliver #
    - [Pub] tokenFromReflection
    - [Ext] addFeelessSender #
       - modifiers: onlyOwner
    - [Ext] addFeelessReceiver #
       - modifiers: onlyOwner
    - [Ext] excludeAccount #
       - modifiers: onlyOwner
    - [Ext] includeAccount #
       - modifiers: onlyOwner
    - [Prv] _approve #
    - [Prv] _transfer #
    - [Pub] multiTransfer #
    - [Prv] _transferStandard #
    - [Prv] _transferToExcluded #
    - [Prv] _transferFromExcluded #
    - [Prv] _transferBothExcluded #
    - [Prv] _reflectFee #
    - [Prv] _weakHandFee #
    - [Prv] _getValues
    - [Prv] getFee
    - [Prv] _getTValues
    - [Prv] _getRValues
    - [Prv] _getRate
    - [Prv] _getCurrentSupply
    - [Prv] _getTaxFee
    - [Prv] _getMaxTxAmount
    - [Ext] setTaxFee #
       - modifiers: onlyOwner
    - [Ext] setWeakHandAddress #
       - modifiers: onlyOwner
    - [Ext] setMaxTxAmount #
       - modifiers: onlyOwner ($) = payable function
 # = non-constant function
  

							

Click here to download the source code as a .sol file.


pragma solidity ^0.6.0;
abstract contract Context {

    function _msgSender() internal virtual view returns (address payable) {

        return msg.sender;

    }
    function _msgData() internal virtual view returns (bytes memory) {

        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691

        return msg.data;

    }

}
/**

 * @dev Interface of the ERC20 standard as defined in the EIP.

 */

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

    );

}
/**

 * @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.

     */

    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.

     */

    function div(

        uint256 a,

        uint256 b,

        string memory errorMessage

    ) internal pure returns (uint256) {

        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.

     */

    function mod(

        uint256 a,

        uint256 b,

        string memory errorMessage

    ) internal pure returns (uint256) {

        require(b != 0, errorMessage);

        return a % b;

    }

}
/**

 * @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 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].

     */

    function sendValue(address payable recipient, uint256 amount) internal {

        require(

            address(this).balance >= amount,

            "Address: insufficient balance"

        );
        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value

        (bool success, ) = recipient.call{value: amount}("");

        require(

            success,

            "Address: unable to send value, recipient may have reverted"

        );

    }
    /**

     * @dev Performs a Solidity function call using a low level `call`. A

     * plain`call` is an unsafe replacement for a function call: use this

     * function instead.

     *

     * If `target` reverts with a revert reason, it is bubbled up by this

     * function (like regular Solidity function calls).

     *

     * Returns the raw returned data. To convert to the expected return value,

     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].

     *

     * Requirements:

     *

     * - `target` must be a contract.

     * - calling `target` with `data` must not revert.

     *

     * _Available since v3.1._

     */

    function functionCall(address target, bytes memory data)

        internal

        returns (bytes memory)

    {

        return functionCall(target, data, "Address: low-level call failed");

    }
    /**

     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with

     * `errorMessage` as a fallback revert reason when `target` reverts.

     *

     * _Available since v3.1._

     */

    function functionCall(

        address target,

        bytes memory data,

        string memory errorMessage

    ) internal returns (bytes memory) {

        return _functionCallWithValue(target, data, 0, errorMessage);

    }
    /**

     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],

     * but also transferring `value` wei to `target`.

     *

     * Requirements:

     *

     * - the calling contract must have an ETH balance of at least `value`.

     * - the called Solidity function must be `payable`.

     *

     * _Available since v3.1._

     */

    function functionCallWithValue(

        address target,

        bytes memory data,

        uint256 value

    ) internal returns (bytes memory) {

        return

            functionCallWithValue(

                target,

                data,

                value,

                "Address: low-level call with value failed"

            );

    }
    /**

     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but

     * with `errorMessage` as a fallback revert reason when `target` reverts.

     *

     * _Available since v3.1._

     */

    function functionCallWithValue(

        address target,

        bytes memory data,

        uint256 value,

        string memory errorMessage

    ) internal returns (bytes memory) {

        require(

            address(this).balance >= value,

            "Address: insufficient balance for call"

        );

        return _functionCallWithValue(target, data, value, errorMessage);

    }
    function _functionCallWithValue(

        address target,

        bytes memory data,

        uint256 weiValue,

        string memory errorMessage

    ) private returns (bytes memory) {

        require(isContract(target), "Address: call to non-contract");
        // solhint-disable-next-line avoid-low-level-calls

        (bool success, bytes memory returndata) = target.call{value: weiValue}(

            data

        );

        if (success) {

            return returndata;

        } else {

            // Look for revert reason and bubble it up if present

            if (returndata.length > 0) {

                // The easiest way to bubble the revert reason is using memory via assembly
                // solhint-disable-next-line no-inline-assembly

                assembly {

                    let returndata_size := mload(returndata)

                    revert(add(32, returndata), returndata_size)

                }

            } else {

                revert(errorMessage);

            }

        }

    }

}
/**

 * @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.

 *

 * By default, the owner account will be the one that deploys the contract. This

 * can later be changed with {transferOwnership}.

 *

 * 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(_owner == _msgSender(), "Ownable: caller is not the 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 virtual 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 virtual onlyOwner {

        require(

            newOwner != address(0),

            "Ownable: new owner is the zero address"

        );

        emit OwnershipTransferred(_owner, newOwner);

        _owner = newOwner;

    }

}
interface IUniswapV2Factory {

    event PairCreated(

        address indexed token0,

        address indexed token1,

        address pair,

        uint256

    );
    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);
    function getPair(address tokenA, address tokenB)

        external

        view

        returns (address pair);
    function allPairs(uint256) external view returns (address pair);
    function allPairsLength() external view returns (uint256);
    function createPair(address tokenA, address tokenB)

        external

        returns (address pair);
    function setFeeTo(address) external;
    function setFeeToSetter(address) external;

}
interface IUniswapV2ERC20 {

    event Approval(

        address indexed owner,

        address indexed spender,

        uint256 value

    );

    event Transfer(address indexed from, address indexed to, uint256 value);
    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint256);
    function balanceOf(address owner) external view returns (uint256);
    function allowance(address owner, address spender)

        external

        view

        returns (uint256);
    function approve(address spender, uint256 value) external returns (bool);
    function transfer(address to, uint256 value) external returns (bool);
    function transferFrom(

        address from,

        address to,

        uint256 value

    ) external returns (bool);
    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint256);
    function permit(

        address owner,

        address spender,

        uint256 value,

        uint256 deadline,

        uint8 v,

        bytes32 r,

        bytes32 s

    ) external;

}
interface IUniswapV2Router01 {

    function factory() external pure returns (address);
    function WETH() external pure returns (address);
    function addLiquidity(

        address tokenA,

        address tokenB,

        uint256 amountADesired,

        uint256 amountBDesired,

        uint256 amountAMin,

        uint256 amountBMin,

        address to,

        uint256 deadline

    )

        external

        returns (

            uint256 amountA,

            uint256 amountB,

            uint256 liquidity

        );
    function addLiquidityETH(

        address token,

        uint256 amountTokenDesired,

        uint256 amountTokenMin,

        uint256 amountETHMin,

        address to,

        uint256 deadline

    )

        external

        payable

        returns (

            uint256 amountToken,

            uint256 amountETH,

            uint256 liquidity

        );
    function removeLiquidity(

        address tokenA,

        address tokenB,

        uint256 liquidity,

        uint256 amountAMin,

        uint256 amountBMin,

        address to,

        uint256 deadline

    ) external returns (uint256 amountA, uint256 amountB);
    function removeLiquidityETH(

        address token,

        uint256 liquidity,

        uint256 amountTokenMin,

        uint256 amountETHMin,

        address to,

        uint256 deadline

    ) external returns (uint256 amountToken, uint256 amountETH);
    function removeLiquidityWithPermit(

        address tokenA,

        address tokenB,

        uint256 liquidity,

        uint256 amountAMin,

        uint256 amountBMin,

        address to,

        uint256 deadline,

        bool approveMax,

        uint8 v,

        bytes32 r,

        bytes32 s

    ) external returns (uint256 amountA, uint256 amountB);
    function removeLiquidityETHWithPermit(

        address token,

        uint256 liquidity,

        uint256 amountTokenMin,

        uint256 amountETHMin,

        address to,

        uint256 deadline,

        bool approveMax,

        uint8 v,

        bytes32 r,

        bytes32 s

    ) external returns (uint256 amountToken, uint256 amountETH);
    function swapExactTokensForTokens(

        uint256 amountIn,

        uint256 amountOutMin,

        address[] calldata path,

        address to,

        uint256 deadline

    ) external returns (uint256[] memory amounts);
    function swapTokensForExactTokens(

        uint256 amountOut,

        uint256 amountInMax,

        address[] calldata path,

        address to,

        uint256 deadline

    ) external returns (uint256[] memory amounts);
    function swapExactETHForTokens(

        uint256 amountOutMin,

        address[] calldata path,

        address to,

        uint256 deadline

    ) external payable returns (uint256[] memory amounts);
    function swapTokensForExactETH(

        uint256 amountOut,

        uint256 amountInMax,

        address[] calldata path,

        address to,

        uint256 deadline

    ) external returns (uint256[] memory amounts);
    function swapExactTokensForETH(

        uint256 amountIn,

        uint256 amountOutMin,

        address[] calldata path,

        address to,

        uint256 deadline

    ) external returns (uint256[] memory amounts);
    function swapETHForExactTokens(

        uint256 amountOut,

        address[] calldata path,

        address to,

        uint256 deadline

    ) external payable returns (uint256[] memory amounts);
    function quote(

        uint256 amountA,

        uint256 reserveA,

        uint256 reserveB

    ) external pure returns (uint256 amountB);
    function getAmountOut(

        uint256 amountIn,

        uint256 reserveIn,

        uint256 reserveOut

    ) external pure returns (uint256 amountOut);
    function getAmountIn(

        uint256 amountOut,

        uint256 reserveIn,

        uint256 reserveOut

    ) external pure returns (uint256 amountIn);
    function getAmountsOut(uint256 amountIn, address[] calldata path)

        external

        view

        returns (uint256[] memory amounts);
    function getAmountsIn(uint256 amountOut, address[] calldata path)

        external

        view

        returns (uint256[] memory amounts);

}
interface IUniswapV2Router02 is IUniswapV2Router01 {

    function removeLiquidityETHSupportingFeeOnTransferTokens(

        address token,

        uint256 liquidity,

        uint256 amountTokenMin,

        uint256 amountETHMin,

        address to,

        uint256 deadline

    ) external returns (uint256 amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(

        address token,

        uint256 liquidity,

        uint256 amountTokenMin,

        uint256 amountETHMin,

        address to,

        uint256 deadline,

        bool approveMax,

        uint8 v,

        bytes32 r,

        bytes32 s

    ) external returns (uint256 amountETH);
    function swapExactTokensForTokensSupportingFeeOnTransferTokens(

        uint256 amountIn,

        uint256 amountOutMin,

        address[] calldata path,

        address to,

        uint256 deadline

    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(

        uint256 amountOutMin,

        address[] calldata path,

        address to,

        uint256 deadline

    ) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(

        uint256 amountIn,

        uint256 amountOutMin,

        address[] calldata path,

        address to,

        uint256 deadline

    ) external;

}
pragma experimental ABIEncoderV2;
contract IProtocol is Context, IERC20, Ownable {

    using SafeMath for uint256;

    using Address for address;
    mapping(address => uint256) private _rOwned;

    mapping(address => uint256) private _tOwned;

    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _isExcluded;

    address[] private _excluded;
    mapping(address => bool) private _isFeelessSenders;

    address[] private _feelessSenders;
    mapping(address => bool) private _isFeelessReceivers;

    address[] private _feelessReceivers;
    uint256 private constant MAX = ~uint256(0);

    uint256 private _tTotal = 500000 * 10**18;

    uint256 private _pTotal = (MAX - (MAX % _tTotal));

    uint256 private _tFeeTotal;

    uint256 private _tBurnTotal;

    uint256 private _minimumSupply = 50000e18;
    string private _name = "IProtocol";

    string private _symbol = "IYP";

    uint8 private _decimals = 18;
    address public _weakHandAddress;

    uint256 private _taxFee = 40;

    uint256 private _burnFee = 5;

    uint256 private _weakHandTaxFee = 20;

    uint256 private _maxTxAmount = 2500e18;

    uint256 private _rTotal = _pTotal.div(10);
    address private _uniswapRouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;

    IUniswapV2Router02 public uniswapV2Router = IUniswapV2Router02(

        _uniswapRouter

    );

    address public immutable uniswapV2Pair;
    struct TValue {

        uint256 tAmount;

        uint256 tTransferAmount;

        uint256 tFee;

        uint256 tBurn;

        uint256 tWeakHand;

    }
    struct RValue {

        uint256 rAmount;

        uint256 rTransferAmount;

        uint256 rFee;

        uint256 rBurn;

        uint256 rWeakHand;

    }
    constructor() public {

        _weakHandAddress = _msgSender();

        _rOwned[_msgSender()] = _rTotal;

        emit Transfer(address(0), _msgSender(), _tTotal);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(

            address(this),

            uniswapV2Router.WETH()

        );

    }
    function name() public view returns (string memory) {

        return _name;

    }
    function symbol() public view returns (string memory) {

        return _symbol;

    }
    function decimals() public view returns (uint8) {

        return _decimals;

    }
    function totalSupply() public override view returns (uint256) {

        return _tTotal;

    }
    function balanceOf(address account) public override view returns (uint256) {

        if (_isExcluded[account]) return _tOwned[account];

        return tokenFromReflection(_rOwned[account]);

    }
    function transfer(address recipient, uint256 amount)

        public

        override

        returns (bool)

    {

        _transfer(_msgSender(), recipient, amount);

        return true;

    }
    function allowance(address owner, address spender)

        public

        override

        view

        returns (uint256)

    {

        return _allowances[owner][spender];

    }
    function approve(address spender, uint256 amount)

        public

        override

        returns (bool)

    {

        _approve(_msgSender(), spender, amount);

        return true;

    }
    function transferFrom(

        address sender,

        address recipient,

        uint256 amount

    ) public override returns (bool) {

        _transfer(sender, recipient, amount);

        _approve(

            sender,

            _msgSender(),

            _allowances[sender][_msgSender()].sub(

                amount,

                "ERC20: transfer amount exceeds allowance"

            )

        );

        return true;

    }
    function increaseAllowance(address spender, uint256 addedValue)

        public

        virtual

        returns (bool)

    {        _approve(

            _msgSender(),

            spender,

            _allowances[_msgSender()][spender].add(addedValue)

        );

        return true;

    }
    function decreaseAllowance(address spender, uint256 subtractedValue)

        public

        virtual

        returns (bool)

    {

        _approve(

            _msgSender(),

            spender,

            _allowances[_msgSender()][spender].sub(

                subtractedValue,

                "ERC20: decreased allowance below zero"

            )

        );

        return true;

    }
    function isExcluded(address account) public view returns (bool) {

        return _isExcluded[account];

    }
    function totalFees() public view returns (uint256) {

        return _tFeeTotal;

    }
    function totalBurn() public view returns (uint256) {

        return _tBurnTotal;

    }
    function deliver(uint256 tAmount) public {

        address sender = _msgSender();

        require(

            !_isExcluded[sender],

            "Excluded addresses cannot call this function"

        );

        (RValue memory rValue, ) = _getValues(tAmount, sender, address(0));

        _rOwned[sender] = _rOwned[sender].sub(rValue.rAmount);

        _rTotal = _rTotal.sub(rValue.rAmount);

        _tFeeTotal = _tFeeTotal.add(tAmount);

    }
    function tokenFromReflection(uint256 rAmount)

        public

        view

        returns (uint256)

    {

        require(

            rAmount <= _pTotal,

            "Amount must be less than total reflections"

        );

        uint256 currentRate = _getRate();

        return rAmount.div(currentRate);

    }
    function addFeelessSender(address account) external onlyOwner() {

        require(account != address(0), "Address is the zero address.");

        require(!_isFeelessSenders[account], "Account is already added");

        _isFeelessSenders[account] = true;

        _feelessSenders.push(account);

    }
    function addFeelessReceiver(address account) external onlyOwner() {

        require(account != address(0), "Address is the zero address.");

        require(!_isFeelessReceivers[account], "Account is already added");

        _isFeelessReceivers[account] = true;

        _feelessReceivers.push(account);

    }
    function excludeAccount(address account) external onlyOwner() {

        require(

            account != 0xD3ce6898eC2252713F96FC21921cEBfca27501d2,

            "We can not exclude Uniswap router."

        );

        require(!_isExcluded[account], "Account is already excluded");

        if (_rOwned[account] > 0) {

            _tOwned[account] = tokenFromReflection(_rOwned[account]);

        }

        _isExcluded[account] = true;

        _excluded.push(account);

    }
    function includeAccount(address account) external onlyOwner() {

        require(_isExcluded[account], "Account is already excluded");

        for (uint256 i = 0; i < _excluded.length; i++) {

            if (_excluded[i] == account) {

                _excluded[i] = _excluded[_excluded.length - 1];

                _tOwned[account] = 0;

                _isExcluded[account] = false;

                _excluded.pop();

                break;

            }

        }

    }
    function _approve(

        address owner,

        address spender,

        uint256 amount

    ) private {

        require(owner != address(0), "ERC20: approve from the zero address");

        require(spender != address(0), "ERC20: approve to the zero address");
        _allowances[owner][spender] = amount;

        emit Approval(owner, spender, amount);

    }
    function _transfer(

        address sender,

        address recipient,

        uint256 amount

    ) private {

        require(sender != address(0), "ERC20: transfer from the zero address");

        require(recipient != address(0), "ERC20: transfer to the zero address");

        require(amount > 0, "Transfer amount must be greater than zero");
        if (sender != owner() && recipient != owner())

            require(

                amount <= _maxTxAmount,

                "Transfer amount exceeds the maxTxAmount."

            );
        if (_isExcluded[sender] && !_isExcluded[recipient]) {

            _transferFromExcluded(sender, recipient, amount);

        } else if (!_isExcluded[sender] && _isExcluded[recipient]) {

            _transferToExcluded(sender, recipient, amount);

        } else if (!_isExcluded[sender] && !_isExcluded[recipient]) {

            _transferStandard(sender, recipient, amount);

        } else if (_isExcluded[sender] && _isExcluded[recipient]) {

            _transferBothExcluded(sender, recipient, amount);

        } else {

            _transferStandard(sender, recipient, amount);

        }

    }
    function multiTransfer(address[] memory receivers, uint256[] memory amounts)

        public

    {

        for (uint256 i = 0; i < receivers.length; i++)

            transfer(receivers[i], amounts[i]);

    }
    function _transferStandard(

        address sender,

        address recipient,

        uint256 tAmount

    ) private {

        (RValue memory rValue, TValue memory tValue) = _getValues(

            tAmount,

            sender,

            recipient

        );

        _rOwned[sender] = _rOwned[sender].sub(rValue.rAmount);

        _rOwned[recipient] = _rOwned[recipient].add(rValue.rTransferAmount);

        _reflectFee(rValue.rFee, rValue.rBurn, tValue.tFee, tValue.tBurn);

        _weakHandFee(rValue.rWeakHand, tValue.tWeakHand);

        emit Transfer(sender, recipient, tValue.tTransferAmount);

    }
    function _transferToExcluded(

        address sender,

        address recipient,

        uint256 tAmount

    ) private {

        (RValue memory rValue, TValue memory tValue) = _getValues(

            tAmount,

            sender,

            recipient

        );

        _rOwned[sender] = _rOwned[sender].sub(rValue.rAmount);

        _tOwned[recipient] = _tOwned[recipient].add(tValue.tTransferAmount);

        _rOwned[recipient] = _rOwned[recipient].add(rValue.rTransferAmount);

        _reflectFee(rValue.rFee, rValue.rBurn, tValue.tFee, tValue.tBurn);

        _weakHandFee(rValue.rWeakHand, tValue.tWeakHand);

        emit Transfer(sender, recipient, tValue.tTransferAmount);

    }
    function _transferFromExcluded(

        address sender,

        address recipient,

        uint256 tAmount

    ) private {

        (RValue memory rValue, TValue memory tValue) = _getValues(

            tAmount,

            sender,

            recipient

        );

        _tOwned[sender] = _tOwned[sender].sub(tValue.tAmount);

        _rOwned[sender] = _rOwned[sender].sub(rValue.rAmount);

        _rOwned[recipient] = _rOwned[recipient].add(rValue.rTransferAmount);

        _reflectFee(rValue.rFee, rValue.rBurn, tValue.tFee, tValue.tBurn);

        _weakHandFee(rValue.rWeakHand, tValue.tWeakHand);

        emit Transfer(sender, recipient, tValue.tTransferAmount);

    }
    function _transferBothExcluded(

        address sender,

        address recipient,

        uint256 tAmount

    ) private {

        (RValue memory rValue, TValue memory tValue) = _getValues(

            tAmount,

            sender,

            recipient

        );

        _tOwned[sender] = _tOwned[sender].sub(tValue.tAmount);

        _rOwned[sender] = _rOwned[sender].sub(rValue.rAmount);

        _tOwned[recipient] = _tOwned[recipient].add(tValue.tTransferAmount);

        _rOwned[recipient] = _rOwned[recipient].add(rValue.rTransferAmount);

        _reflectFee(rValue.rFee, rValue.rBurn, tValue.tFee, tValue.tBurn);

        _weakHandFee(rValue.rWeakHand, tValue.tWeakHand);

        emit Transfer(sender, recipient, tValue.tTransferAmount);

    }
    function _reflectFee(

        uint256 rFee,

        uint256 rBurn,

        uint256 tFee,

        uint256 tBurn

    ) private {

        _rTotal = _rTotal.sub(rFee).sub(rBurn);

        _tFeeTotal = _tFeeTotal.add(tFee);

        _tBurnTotal = _tBurnTotal.add(tBurn);

        _tTotal = _tTotal.sub(tBurn);

    }
    function _weakHandFee(uint256 rWeakHand, uint256 tWeakHand) private {

        if (_isExcluded[_weakHandAddress]) {

            _tOwned[_weakHandAddress] = _tOwned[_weakHandAddress].add(

                tWeakHand

            );

            _rOwned[_weakHandAddress] = _rOwned[_weakHandAddress].add(

                rWeakHand

            );

        } else {

            _rOwned[_weakHandAddress] = _rOwned[_weakHandAddress].add(

                rWeakHand

            );

        }

    }
    function _getValues(

        uint256 tAmount,

        address sender,

        address recipient

    ) private view returns (RValue memory, TValue memory) {

        TValue memory tValue = _getTValues(tAmount, sender, recipient);
        RValue memory rValue = _getRValues(

            tValue.tAmount,

            tValue.tFee,

            tValue.tBurn,

            tValue.tWeakHand

        );
        return (rValue, tValue);

    }
    function getFee(address sender, address recipient)

        private

        view

        returns (

            uint256,

            uint256,

            uint256

        )

    {

        if (_isFeelessReceivers[recipient] || _isFeelessSenders[sender]) {

            return (0, 0, 0);

        }

        uint256 weakHandTaxFee = _weakHandTaxFee;

        uint256 burnFee = _burnFee;

        if (sender == _uniswapRouter || recipient != _uniswapRouter) {

            weakHandTaxFee = 0;

        }

        if (_tTotal <= _minimumSupply) {

            burnFee = 0;

        }

        return (_taxFee, burnFee, weakHandTaxFee);

    }
    function _getTValues(

        uint256 tAmount,

        address sender,

        address recipient

    ) private view returns (TValue memory) {

        (uint256 taxFee, uint256 burnFee, uint256 weakHandTaxFee) = getFee(

            sender,

            recipient

        );

        TValue memory tValue;

        tValue.tAmount = tAmount;

        tValue.tWeakHand = tAmount.mul(weakHandTaxFee).div(1000);

        tValue.tFee = tAmount.mul(taxFee).div(1000);

        tValue.tBurn = tAmount.mul(burnFee).div(1000);

        tValue.tTransferAmount = tAmount.sub(tValue.tFee).sub(tValue.tBurn).sub(

            tValue.tWeakHand

        );

        return tValue;

    }
    function _getRValues(

        uint256 tAmount,

        uint256 tFee,

        uint256 tBurn,

        uint256 tWeakHand

    ) private view returns (RValue memory) {

        uint256 currentRate = _getRate();

        RValue memory rValue;

        rValue.rAmount = tAmount.mul(currentRate);

        rValue.rFee = tFee.mul(currentRate);

        rValue.rBurn = tBurn.mul(currentRate);

        rValue.rWeakHand = tWeakHand.mul(currentRate);

        rValue.rTransferAmount = rValue

            .rAmount

            .sub(rValue.rFee)

            .sub(rValue.rBurn)

            .sub(rValue.rWeakHand);

        return rValue;

    }
    function _getRate() private view returns (uint256) {

        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();

        return rSupply.div(tSupply);

    }
    function _getCurrentSupply() private view returns (uint256, uint256) {

        uint256 rSupply = _rTotal;

        uint256 tSupply = _tTotal;

        for (uint256 i = 0; i < _excluded.length; i++) {

            if (

                _rOwned[_excluded[i]] > rSupply ||

                _tOwned[_excluded[i]] > tSupply

            ) return (_rTotal, _tTotal);

            rSupply = rSupply.sub(_rOwned[_excluded[i]]);

            tSupply = tSupply.sub(_tOwned[_excluded[i]]);

        }

        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);

        return (rSupply, tSupply);

    }
    function _getTaxFee() private view returns (uint256) {

        return _taxFee;

    }
    function _getMaxTxAmount() private view returns (uint256) {

        return _maxTxAmount;

    }
    function setTaxFee(uint256 taxFee) external onlyOwner() {

        require(taxFee >= 1 && taxFee <= 10, "taxFee should be in 1 - 10");

        _taxFee = taxFee;

    }
    function setWeakHandAddress(address weakHandAddress) external onlyOwner() {

        require(

            weakHandAddress != address(0),

            "WeakHand: address is the zero address"

        );

        _weakHandAddress = weakHandAddress;

    }
    function setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() {

        require(

            maxTxAmount >= 9000e18,

            "maxTxAmount should be greater than 9000e18"

        );

        _maxTxAmount = maxTxAmount;

    }

}