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•  contract PProxyStorage
•    - function readString(bytes32 _key)
•    - function setString(bytes32 _key, stri ...
•    - function readBool(bytes32 _key)
•    - function setBool(bytes32 _key, bool _ ...
•    - function readAddress(bytes32 _key)
•    - function setAddress(bytes32 _key, add ...
•    - function storageRead(bytes32 _key)
•    - function storageSet(bytes32 _key, byt ...
•    - function bytes32ToAddress(bytes32 _va ...
•    - function addressToBytes32(address _va ...
•    - function stringToBytes32(string memor ...
•    - function bytes32ToString(bytes32 _val ...
•  contract PProxy is PProxyStorage
•    - function getProxyOwner()
•    - function setProxyOwner(address _newOw ...
•    - function getImplementation()
•    - function setImplementation(address _n ...
•    - function internalFallback()
•  contract PProxyPausable is PProxy *
•    - function getPauzer()
•    - function setPauzer(address _newPauzer ...
•    - function renouncePauzer()
•    - function getPaused()
•    - function setPaused(bool _value)
•    - function internalFallback()
• interface IBFactory
•    - function newBPool()
• interface IBPool
•    - function isBound(address token)
•    - function getBalance(address token)
•    - function rebind(address token, uint b ...
•    - function setSwapFee(uint swapFee)
•    - function setPublicSwap(bool _public)
•    - function bind(address token, uint bal ...
•    - function unbind(address token)
•    - function getDenormalizedWeight(addres ...
•    - function getTotalDenormalizedWeight()
•    - function getCurrentTokens()
•    - function setController(address manage ...
•    - function isPublicSwap()
•    - function getSwapFee()
•    - function gulp(address token)
•    - function calcPoolOutGivenSingleIn(
•    - function calcSingleInGivenPoolOut(
•    - function calcSingleOutGivenPoolIn(
•    - function calcPoolInGivenSingleOut(
• interface IERC20
•    - function totalSupply()
•    - function balanceOf(address _whom)
•    - function allowance(address _src, addr ...
•    - function approve(address _dst, uint _ ...
•    - function transfer(address _dst, uint ...
•    - function transferFrom(
•  contract Ownable
•    - function transferOwnership(address _n ...
•    - function _setOwner(address _newOwner)
•    - function los()
• interface IPSmartPool is IERC20
•    - function joinPool(uint256 _amount)
•    - function exitPool(uint256 _amount)
•    - function getController()
•    - function getTokens()
•    - function calcTokensForAmount(uint256 ...
•  contract PCTokenStorage
•    - function lpts()
•  contract PCToken is IERC20, PCToke ...
•    - function badd(uint a, uint b)
•    - function bsub(uint a, uint b)
•    - function bsubSign(uint a, uint b)
•    - function bmul(uint a, uint b)
•    - function bdiv(uint a, uint b)
•    - function _mint(uint _amount)
•    - function _burn(uint _amount)
•    - function _move(address _src, address ...
•    - function _push(address _to, uint _amo ...
•    - function _pull(address _from, uint _a ...
•    - function allowance(address _src, addr ...
•    - function balanceOf(address _whom)
•    - function totalSupply()
•    - function name()
•    - function symbol()
•    - function approve(address _dst, uint _ ...
•    - function increaseApproval(address _ds ...
•    - function decreaseApproval(address _ds ...
•    - function transfer(address _dst, uint ...
•    - function transferFrom(address _src, a ...
•  contract ReentryProtection
•    - function lrps()
•  contract PBasicSmartPool is IPSmar ...
•    - function init(address _bPool, string ...
•    - function approveTokens()
•    - function setController(address _contr ...
•    - function setPublicSwapSetter(address ...
•    - function setTokenBinder(address _newT ...
•    - function setPublicSwap(bool _public)
•    - function setSwapFee(uint256 _swapFee)
•    - function joinPool(uint256 _amount)
•    - function _joinPool(uint256 _amount)
•    - function exitPool(uint256 _amount)
•    - function bind(address _token, uint256 ...
•    - function rebind(address _token, uint2 ...
•    - function unbind(address _token)
•    - function getTokens()
•    - function calcTokensForAmount(uint256 ...
•    - function getController()
•    - function getPublicSwapSetter()
•    - function getTokenBinder()
•    - function isPublicSwap()
•    - function getSwapFee()
•    - function getBPool()
•    - function _pullUnderlying(address _tok ...
•    - function _pushUnderlying(address _tok ...
•    - function _pullPoolShare(address _from ...
•    - function _burnPoolShare(uint256 _amou ...
•    - function _mintPoolShare(uint256 _amou ...
•    - function _pushPoolShare(address _to, ...
•    - function lpbs()
•  contract PCappedSmartPool is PBasi ...
•    - function setCap(uint256 _cap)
•    - function joinPool(uint256 _amount)
•    - function getCap()
•    - function lpcs()
•  contract PProxiedFactory is Ownabl ...
•    - function init(address _balancerFactor ...
•    - function newProxiedSmartPool(
• interface IUniswapFactory
•    - function createExchange(address token ...
•    - function getExchange(address token)
•    - function getToken(address exchange)
•    - function getTokenWithId(uint256 token ...
•    - function initializeFactory(address te ...
• interface IUniswapExchange
•    - function tokenAddress()
•    - function factoryAddress()
•    - function addLiquidity(uint256 min_liq ...
•    - function removeLiquidity(uint256 amou ...
•    - function getEthToTokenInputPrice(uint ...
•    - function getEthToTokenOutputPrice(uin ...
•    - function getTokenToEthInputPrice(uint ...
•    - function getTokenToEthOutputPrice(uin ...
•    - function ethToTokenSwapInput(uint256 ...
•    - function ethToTokenTransferInput(uint ...
•    - function ethToTokenSwapOutput(uint256 ...
•    - function ethToTokenTransferOutput(uin ...
•    - function tokenToEthSwapInput(uint256 ...
•    - function tokenToEthTransferInput(uint ...
•    - function tokenToEthSwapOutput(uint256 ...
•    - function tokenToEthTransferOutput(uin ...
•    - function tokenToTokenSwapInput(uint25 ...
•    - function tokenToTokenTransferInput(ui ...
•    - function tokenToTokenSwapOutput(uint2 ...
•    - function tokenToTokenTransferOutput(u ...
•    - function tokenToExchangeSwapInput(uin ...
•    - function tokenToExchangeTransferInput ...
•    - function tokenToExchangeSwapOutput(ui ...
•    - function tokenToExchangeTransferOutpu ...
•    - function transfer(address _to, uint25 ...
•    - function transferFrom(address _from, ...
•    - function approve(address _spender, ui ...
•    - function allowance(address _owner, ad ...
•    - function balanceOf(address _owner)
•    - function totalSupply()
•    - function setup(address token_addr)
•  contract PUniswapPoolRecipe
•    - function init(address _pool, address ...
•    - function ethToTokenTransferOutput(uin ...
•    - function ethToTokenSwapOutput(uint256 ...
•    - function _ethToToken(address _token, ...
•    - function getEthToTokenOutputPrice(uin ...
•    - function tokenToEthTransferInput(uint ...
•    - function tokenToEthSwapInput(uint256 ...
•    - function _tokenToEth(IERC20 _token, u ...
•    - function getTokenToEthInputPrice(uint ...
•    - function pool()
•    - function luprs()
• interface IKyberNetwork
•    - function trade(
•  contract PUniswapKyberPoolRecipe i ...
•    - function init(address, address)
•    - function initUK(address _pool, addres ...
•    - function setKyberSwap(address _token, ...
•    - function _ethToToken(address _token, ...
•    - function _tokenToEth(IERC20 _token, u ...
•    - function lukprs()
•  contract TestReentryProtection is ...
•    - function test()
•    - function reenter()

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/**
 *Submitted for verification at Etherscan.io on 2020-04-02
*/

/**
 *Submitted for verification at Etherscan.io on 2020-04-02
*/

// Sources flattened with buidler v1.2.0 https://buidler.dev

// File @pie-dao/proxy/contracts/[email protected]

pragma solidity ^0.6.2;

contract PProxyStorage {

    function readString(bytes32 _key) public view returns(string memory) {
        return bytes32ToString(storageRead(_key));
    }

    function setString(bytes32 _key, string memory _value) internal {
        storageSet(_key, stringToBytes32(_value));
    }

    function readBool(bytes32 _key) public view returns(bool) {
        return storageRead(_key) == bytes32(uint256(1));
    }

    function setBool(bytes32 _key, bool _value) internal {
        if(_value) {
            storageSet(_key, bytes32(uint256(1)));
        } else {
            storageSet(_key, bytes32(uint256(0)));
        }
    }

    function readAddress(bytes32 _key) public view returns(address) {
        return bytes32ToAddress(storageRead(_key));
    }

    function setAddress(bytes32 _key, address _value) internal {
        storageSet(_key, addressToBytes32(_value));
    }

    function storageRead(bytes32 _key) public view returns(bytes32) {
        bytes32 value;
        //solium-disable-next-line security/no-inline-assembly
        assembly {
            value := sload(_key)
        }
        return value;
    }

    function storageSet(bytes32 _key, bytes32 _value) internal {
        // targetAddress = _address;  // No!
        bytes32 implAddressStorageKey = _key;
        //solium-disable-next-line security/no-inline-assembly
        assembly {
            sstore(implAddressStorageKey, _value)
        }
    }

    function bytes32ToAddress(bytes32 _value) public pure returns(address) {
        return address(uint160(uint256(_value)));
    }

    function addressToBytes32(address _value) public pure returns(bytes32) {
        return bytes32(uint256(_value));
    }

    function stringToBytes32(string memory _value) public pure returns (bytes32 result) {
        bytes memory tempEmptyStringTest = bytes(_value);
        if (tempEmptyStringTest.length == 0) {
            return 0x0;
        }

        assembly {
            result := mload(add(_value, 32))
        }
    }

    function bytes32ToString(bytes32 _value) public pure returns (string memory) {
        bytes memory bytesString = new bytes(32);
        uint charCount = 0;
        for (uint256 j = 0; j < 32; j++) {
            byte char = byte(bytes32(uint(_value) * 2 ** (8 * j)));
            if (char != 0) {
                bytesString[charCount] = char;
                charCount++;
            }
        }
        bytes memory bytesStringTrimmed = new bytes(charCount);
        for (uint256 j = 0; j < charCount; j++) {
            bytesStringTrimmed[j] = bytesString[j];
        }
        return string(bytesStringTrimmed);
    }
}


// File @pie-dao/proxy/contracts/[email protected]

pragma solidity ^0.6.2;


contract PProxy is PProxyStorage {

    bytes32 constant IMPLEMENTATION_SLOT = keccak256(abi.encodePacked("IMPLEMENTATION_SLOT"));
    bytes32 constant OWNER_SLOT = keccak256(abi.encodePacked("OWNER_SLOT"));

    modifier onlyProxyOwner() {
        require(msg.sender == readAddress(OWNER_SLOT), "PProxy.onlyProxyOwner: msg sender not owner");
        _;
    }

    constructor () public {
        setAddress(OWNER_SLOT, msg.sender);
    }

    function getProxyOwner() public view returns (address) {
       return readAddress(OWNER_SLOT);
    }

    function setProxyOwner(address _newOwner) onlyProxyOwner public {
        setAddress(OWNER_SLOT, _newOwner);
    }

    function getImplementation() public view returns (address) {
        return readAddress(IMPLEMENTATION_SLOT);
    }

    function setImplementation(address _newImplementation) onlyProxyOwner public {
        setAddress(IMPLEMENTATION_SLOT, _newImplementation);
    }


    fallback () external payable {
       return internalFallback();
    }

    function internalFallback() internal virtual {
        address contractAddr = readAddress(IMPLEMENTATION_SLOT);
        assembly {
            let ptr := mload(0x40)
            calldatacopy(ptr, 0, calldatasize())
            let result := delegatecall(gas(), contractAddr, ptr, calldatasize(), 0, 0)
            let size := returndatasize()
            returndatacopy(ptr, 0, size)

            switch result
            case 0 { revert(ptr, size) }
            default { return(ptr, size) }
        }
    }

}


// File @pie-dao/proxy/contracts/[email protected]

pragma solidity ^0.6.2;


contract PProxyPausable is PProxy {

    bytes32 constant PAUSED_SLOT = keccak256(abi.encodePacked("PAUSED_SLOT"));
    bytes32 constant PAUZER_SLOT = keccak256(abi.encodePacked("PAUZER_SLOT"));

    constructor() PProxy() public {
        setAddress(PAUZER_SLOT, msg.sender);
    }

    modifier onlyPauzer() {
        require(msg.sender == readAddress(PAUZER_SLOT), "PProxyPausable.onlyPauzer: msg sender not pauzer");
        _;
    }

    modifier notPaused() {
        require(!readBool(PAUSED_SLOT), "PProxyPausable.notPaused: contract is paused");
        _;
    }

    function getPauzer() public view returns (address) {
        return readAddress(PAUZER_SLOT);
    }

    function setPauzer(address _newPauzer) public onlyProxyOwner{
        setAddress(PAUZER_SLOT, _newPauzer);
    }

    function renouncePauzer() public onlyPauzer {
        setAddress(PAUZER_SLOT, address(0));
    }

    function getPaused() public view returns (bool) {
        return readBool(PAUSED_SLOT);
    }

    function setPaused(bool _value) public onlyPauzer {
        setBool(PAUSED_SLOT, _value);
    }

    function internalFallback() internal virtual override notPaused {
        super.internalFallback();
    }

}


// File contracts/interfaces/IBFactory.sol

pragma solidity ^0.6.4;

interface IBFactory {
    function newBPool() external returns (address);
}


// File contracts/interfaces/IBPool.sol

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is disstributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity 0.6.4;

interface IBPool {
    function isBound(address token) external view returns(bool);
    function getBalance(address token) external view returns (uint);
    function rebind(address token, uint balance, uint denorm) external;
    function setSwapFee(uint swapFee) external;
    function setPublicSwap(bool _public) external;
    function bind(address token, uint balance, uint denorm) external;
    function unbind(address token) external;
    function getDenormalizedWeight(address token) external view returns (uint);
    function getTotalDenormalizedWeight() external view returns (uint);
    function getCurrentTokens() external view returns(address[] memory);
    function setController(address manager) external;
    function isPublicSwap() external view returns(bool);
    function getSwapFee() external view returns (uint256);
    function gulp(address token) external;

    function calcPoolOutGivenSingleIn(
        uint tokenBalanceIn,
        uint tokenWeightIn,
        uint poolSupply,
        uint totalWeight,
        uint tokenAmountIn,
        uint swapFee
    )
        external pure
        returns (uint poolAmountOut);

    function calcSingleInGivenPoolOut(
        uint tokenBalanceIn,
        uint tokenWeightIn,
        uint poolSupply,
        uint totalWeight,
        uint poolAmountOut,
        uint swapFee
    )
        external pure
        returns (uint tokenAmountIn);

    function calcSingleOutGivenPoolIn(
        uint tokenBalanceOut,
        uint tokenWeightOut,
        uint poolSupply,
        uint totalWeight,
        uint poolAmountIn,
        uint swapFee
    )
        external pure
        returns (uint tokenAmountOut);

    function calcPoolInGivenSingleOut(
        uint tokenBalanceOut,
        uint tokenWeightOut,
        uint poolSupply,
        uint totalWeight,
        uint tokenAmountOut,
        uint swapFee
    )
        external pure
        returns (uint poolAmountIn);
}


// File contracts/interfaces/IERC20.sol

pragma solidity ^0.6.4;

interface IERC20 {
    event Approval(address indexed _src, address indexed _dst, uint _amount);
    event Transfer(address indexed _src, address indexed _dst, uint _amount);

    function totalSupply() external view returns (uint);
    function balanceOf(address _whom) external view returns (uint);
    function allowance(address _src, address _dst) external view returns (uint);

    function approve(address _dst, uint _amount) external returns (bool);
    function transfer(address _dst, uint _amount) external returns (bool);
    function transferFrom(
        address _src, address _dst, uint _amount
    ) external returns (bool);
}


// File contracts/Ownable.sol

pragma solidity ^0.6.4;

// TODO move this generic contract to a seperate repo with all generic smart contracts

contract Ownable {

    bytes32 constant public oSlot = keccak256("Ownable.storage.location");

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

    // Ownable struct
    struct os {
        address owner;
    }

    modifier onlyOwner(){
        require(msg.sender == los().owner, "Ownable.onlyOwner: msg.sender not owner");
        _;
    }

    /**
        @notice Transfer ownership to a new address
        @param _newOwner Address of the new owner
    */
    function transferOwnership(address _newOwner) onlyOwner external {
        _setOwner(_newOwner);
    }

    /**
        @notice Internal method to set the owner
        @param _newOwner Address of the new owner
    */
    function _setOwner(address _newOwner) internal {
        emit OwnerChanged(los().owner, _newOwner);
        los().owner = _newOwner;
    }

    /**
        @notice Load ownable storage
        @return s Storage pointer to the Ownable storage struct
    */
    function los() internal pure returns (os storage s) {
        bytes32 loc = oSlot;
        assembly {
            s_slot := loc
        }
    }

}


// File contracts/interfaces/IPSmartPool.sol

pragma solidity ^0.6.4;

interface IPSmartPool is IERC20 {
    function joinPool(uint256 _amount) external;
    function exitPool(uint256 _amount) external;
    function getController() external view returns(address);
    function getTokens() external view returns(address[] memory);
    function calcTokensForAmount(uint256 _amount) external view  returns(address[] memory tokens, uint256[] memory amounts);
}


// File contracts/PCTokenStorage.sol

pragma solidity ^0.6.4;

contract PCTokenStorage {

    bytes32 constant public ptSlot = keccak256("PCToken.storage.location");
    struct pts {
        string name;
        string symbol;
        uint256 totalSupply;
        mapping(address => uint256) balance;
        mapping(address => mapping(address=>uint256)) allowance;
    }

    /**
        @notice Load pool token storage
        @return s Storage pointer to the pool token struct
    */
    function lpts() internal pure returns (pts storage s) {
        bytes32 loc = ptSlot;
        assembly {
            s_slot := loc
        }
    }

}


// File contracts/PCToken.sol

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.6.4;



// Highly opinionated token implementation
// Based on the balancer Implementation


contract PCToken is IERC20, PCTokenStorage {

    event Approval(address indexed _src, address indexed _dst, uint _amount);
    event Transfer(address indexed _src, address indexed _dst, uint _amount);

    uint8 public constant decimals = 18;
    uint public constant BONE              = 10**18;
    uint public constant MAX_BOUND_TOKENS  = 8;
    uint public constant MIN_WEIGHT        = BONE;
    uint public constant MAX_WEIGHT        = BONE * 50;
    uint public constant MAX_TOTAL_WEIGHT  = BONE * 50;
    uint public constant MIN_BALANCE       = BONE / 10**6;
    uint public constant MAX_BALANCE       = BONE * 10**12;

    uint public constant MIN_POOL_SUPPLY   = BONE;

    function badd(uint a, uint b)
        internal pure
        returns (uint)
    {
        uint c = a + b;
        require(c >= a, "ERR_ADD_OVERFLOW");
        return c;
    }

    function bsub(uint a, uint b)
        internal pure
        returns (uint)
    {
        (uint c, bool flag) = bsubSign(a, b);
        require(!flag, "ERR_SUB_UNDERFLOW");
        return c;
    }

    function bsubSign(uint a, uint b)
        internal pure
        returns (uint, bool)
    {
        if (a >= b) {
            return (a - b, false);
        } else {
            return (b - a, true);
        }
    }

    function bmul(uint a, uint b)
        internal pure
        returns (uint)
    {
        uint c0 = a * b;
        require(a == 0 || c0 / a == b, "ERR_MUL_OVERFLOW");
        uint c1 = c0 + (BONE / 2);
        require(c1 >= c0, "ERR_MUL_OVERFLOW");
        uint c2 = c1 / BONE;
        return c2;
    }

    function bdiv(uint a, uint b)
        internal pure
        returns (uint)
    {
        require(b != 0, "ERR_DIV_ZERO");
        uint c0 = a * BONE;
        require(a == 0 || c0 / a == BONE, "ERR_DIV_INTERNAL"); // bmul overflow
        uint c1 = c0 + (b / 2);
        require(c1 >= c0, "ERR_DIV_INTERNAL"); //  badd require
        uint c2 = c1 / b;
        return c2;
    }

    function _mint(uint _amount) internal {
        pts storage s = lpts();
        s.balance[address(this)] = badd(s.balance[address(this)], _amount);
        s.totalSupply = badd(s.totalSupply, _amount);
        emit Transfer(address(0), address(this), _amount);
    }

    function _burn(uint _amount) internal {
        pts storage s = lpts();
        require(s.balance[address(this)] >= _amount, "ERR_INSUFFICIENT_BAL");
        s.balance[address(this)] = bsub(s.balance[address(this)], _amount);
        s.totalSupply = bsub(s.totalSupply, _amount);
        emit Transfer(address(this), address(0), _amount);
    }

    function _move(address _src, address _dst, uint _amount) internal {
        pts storage s = lpts();
        require(s.balance[_src] >= _amount, "ERR_INSUFFICIENT_BAL");
        s.balance[_src] = bsub(s.balance[_src], _amount);
        s.balance[_dst] = badd(s.balance[_dst], _amount);
        emit Transfer(_src, _dst, _amount);
    }

    function _push(address _to, uint _amount) internal {
        _move(address(this), _to, _amount);
    }

    function _pull(address _from, uint _amount) internal {
        _move(_from, address(this), _amount);
    }

    function allowance(address _src, address _dst) external view override returns (uint) {
        return lpts().allowance[_src][_dst];
    }

    function balanceOf(address _whom) external view override returns (uint) {
        return lpts().balance[_whom];
    }

    function totalSupply() public view override returns (uint) {
        return lpts().totalSupply;
    }

    function name() external view returns (string memory) {
        return lpts().name;
    }

    function symbol() external view returns (string memory) {
        return lpts().symbol;
    }

    function approve(address _dst, uint _amount) external override returns (bool) {
        lpts().allowance[msg.sender][_dst] = _amount;
        emit Approval(msg.sender, _dst, _amount);
        return true;
    }

    function increaseApproval(address _dst, uint _amount) external returns (bool) {
        pts storage s = lpts();
        s.allowance[msg.sender][_dst] = badd(s.allowance[msg.sender][_dst], _amount);
        emit Approval(msg.sender, _dst, s.allowance[msg.sender][_dst]);
        return true;
    }

    function decreaseApproval(address _dst, uint _amount) external returns (bool) {
        pts storage s = lpts();
        uint oldValue = s.allowance[msg.sender][_dst];
        if (_amount > oldValue) {
            s.allowance[msg.sender][_dst] = 0;
        } else {
            s.allowance[msg.sender][_dst] = bsub(oldValue, _amount);
        }
        emit Approval(msg.sender, _dst, s.allowance[msg.sender][_dst]);
        return true;
    }

    function transfer(address _dst, uint _amount) external override returns (bool) {
        _move(msg.sender, _dst, _amount);
        return true;
    }

    function transferFrom(address _src, address _dst, uint _amount) external override returns (bool) {
        pts storage s = lpts();
        require(msg.sender == _src || _amount <= s.allowance[_src][msg.sender], "ERR_PCTOKEN_BAD_CALLER");
        _move(_src, _dst, _amount);
        if (msg.sender != _src && s.allowance[_src][msg.sender] != uint256(-1)) {
            s.allowance[_src][msg.sender] = bsub(s.allowance[_src][msg.sender], _amount);
            emit Approval(msg.sender, _dst, s.allowance[_src][msg.sender]);
        }
        return true;
    }
}


// File contracts/ReentryProtection.sol

pragma solidity ^0.6.4;

// TODO move this generic contract to a seperate repo with all generic smart contracts

contract ReentryProtection {

    bytes32 constant public rpSlot = keccak256("ReentryProtection.storage.location");

    // reentry protection storage
    struct rps {
        uint256 lockCounter;
    }

    modifier noReentry {
        // Use counter to only write to storage once
        lrps().lockCounter ++;
        uint256 lockValue = lrps().lockCounter;
        _;
        require(lockValue == lrps().lockCounter, "ReentryProtection.noReentry: reentry detected");
    }

    /**
        @notice Load reentry protection storage
        @return s Pointer to the reentry protection storage struct
    */
    function lrps() internal pure returns (rps storage s) {
        bytes32 loc = rpSlot;
        assembly {
            s_slot := loc
        }
    }

}


// File contracts/smart-pools/PBasicSmartPool.sol

pragma solidity ^0.6.4;





contract PBasicSmartPool is IPSmartPool, PCToken, ReentryProtection {
    
    // P Basic Smart Struct
    bytes32 constant public pbsSlot = keccak256("PBasicSmartPool.storage.location");
    struct pbs {
        IBPool bPool;
        address controller;
        address publicSwapSetter;
        address tokenBinder;
    }
    
    modifier ready() {
        require(address(lpbs().bPool) != address(0), "PBasicSmartPool.ready: not ready");
        _;
    }   

     event LOG_JOIN(
        address indexed caller,
        address indexed tokenIn,
        uint256 tokenAmountIn
    );

    event LOG_EXIT(
        address indexed caller,
        address indexed tokenOut,
        uint256 tokenAmountOut
    );

    event TokensApproved();
    event ControllerChanged(address indexed previousController, address indexed newController);
    event PublicSwapSetterChanged(address indexed previousSetter, address indexed newSetter);
    event TokenBinderChanged(address indexed previousTokenBinder, address indexed newTokenBinder);
    event PublicSwapSet(address indexed setter, bool indexed value);
    event SwapFeeSet(address indexed setter, uint256 newFee);
    event PoolJoined(address indexed from, uint256 amount);
    event PoolExited(address indexed from, uint256 amount);

    modifier onlyController() {
        require(msg.sender == lpbs().controller, "PBasicSmartPool.onlyController: not controller");
        _;
    }

    modifier onlyPublicSwapSetter() {
        require(msg.sender == lpbs().publicSwapSetter, "PBasicSmartPool.onlyPublicSwapSetter: not public swap setter");
        _;
    }

    modifier onlyTokenBinder() {
        require(msg.sender == lpbs().tokenBinder, "PBasicSmartPool.onlyTokenBinder: not token binder");
        _;
    }

    /**
        @notice Initialises the contract
        @param _bPool Address of the underlying balancer pool
        @param _name Name for the smart pool token
        @param _symbol Symbol for the smart pool token
        @param _initialSupply Initial token supply to mint
    */
    function init(address _bPool, string calldata _name, string calldata _symbol, uint256 _initialSupply) external {
        pbs storage s = lpbs();
        require(address(s.bPool) == address(0), "PBasicSmartPool.init: already initialised");
        s.bPool = IBPool(_bPool);
        s.controller = msg.sender;
        s.publicSwapSetter = msg.sender;
        s.tokenBinder = msg.sender;
        lpts().name = _name;
        lpts().symbol = _symbol;
        _mintPoolShare(_initialSupply);
        _pushPoolShare(msg.sender, _initialSupply);
    }

    /**
        @notice Sets approval to all tokens to the underlying balancer pool
        @dev It uses this function to save on gas in joinPool
    */
    function approveTokens() public {
        IBPool bPool = lpbs().bPool;
        address[] memory tokens = bPool.getCurrentTokens();
        for(uint256 i = 0; i < tokens.length; i ++) {
            IERC20(tokens[i]).approve(address(bPool), uint256(-1));
        }
        emit TokensApproved();
    }

    /**
        @notice Sets the controller address. Can only be set by the current controller
        @param _controller Address of the new controller
    */
    function setController(address _controller) onlyController noReentry external {
        emit ControllerChanged(lpbs().controller, _controller);
        lpbs().controller = _controller;
    }

    /**
        @notice Sets public swap setter address. Can only be set by the controller
        @param _newPublicSwapSetter Address of the new public swap setter
    */
    function setPublicSwapSetter(address _newPublicSwapSetter) onlyController external {
        emit PublicSwapSetterChanged(lpbs().publicSwapSetter, _newPublicSwapSetter);
        lpbs().publicSwapSetter = _newPublicSwapSetter;
    }

    /**
        @notice Sets the token binder address. Can only be set by the controller
        @param _newTokenBinder Address of the new token binder
    */
    function setTokenBinder(address _newTokenBinder) onlyController external {
        emit TokenBinderChanged(lpbs().tokenBinder, _newTokenBinder);
        lpbs().tokenBinder = _newTokenBinder;
    }

    /**
        @notice Enables or disables public swapping on the underlying balancer pool. Can only be set by the controller
        @param _public Public or not
    */
    function setPublicSwap(bool _public) onlyPublicSwapSetter external {
        emit PublicSwapSet(msg.sender, _public);
        lpbs().bPool.setPublicSwap(_public);
    }

    /**
        @notice Set the swap fee on the underlying balancer pool. Can only be called by the controller
        @param _swapFee The new swap fee
    */
    function setSwapFee(uint256 _swapFee) onlyController external {
        emit SwapFeeSet(msg.sender, _swapFee);
        lpbs().bPool.setSwapFee(_swapFee);
    }

    /** 
        @notice Mints pool shares in exchange for underlying assets
        @param _amount Amount of pool shares to mint
    */
    function joinPool(uint256 _amount) external override virtual ready {
        _joinPool(_amount);
    }

    /**
        @notice Internal join pool function. See joinPool for more info
        @param _amount Amount of pool shares to mint
    */
    function _joinPool(uint256 _amount) internal virtual ready {
        IBPool bPool = lpbs().bPool;
        uint poolTotal = totalSupply();
        uint ratio = bdiv(_amount, poolTotal);
        require(ratio != 0);

        address[] memory tokens = bPool.getCurrentTokens();

        for (uint i = 0; i < tokens.length; i++) {
            address t = tokens[i];
            uint bal = bPool.getBalance(t);
            uint tokenAmountIn = bmul(ratio, bal);
            emit LOG_JOIN(msg.sender, t, tokenAmountIn);
            _pullUnderlying(t, msg.sender, tokenAmountIn, bal);
        }
        _mintPoolShare(_amount);
        _pushPoolShare(msg.sender, _amount);
        emit PoolJoined(msg.sender, _amount);
    }

    /** 
        @notice Burns pool shares and sends back the underlying assets
        @param _amount Amount of pool tokens to burn
    */
    function exitPool(uint256 _amount) external override ready noReentry {
        IBPool bPool = lpbs().bPool;
        uint poolTotal = totalSupply();
        uint ratio = bdiv(_amount, poolTotal);
        require(ratio != 0);

        _pullPoolShare(msg.sender, _amount);
        _burnPoolShare(_amount);

        address[] memory tokens = bPool.getCurrentTokens();

        for (uint i = 0; i < tokens.length; i++) {
            address t = tokens[i];
            uint bal = bPool.getBalance(t);
            uint tAo = bmul(ratio, bal);
            emit LOG_EXIT(msg.sender, t, tAo);  
            _pushUnderlying(t, msg.sender, tAo, bal);
        }
        emit PoolExited(msg.sender, _amount);
    }

    /**
        @notice Bind a token to the underlying balancer pool. Can only be called by the token binder
        @param _token Token to bind
        @param _balance Amount to bind
        @param _denorm Denormalised weight
    */
    function bind(address _token, uint256 _balance, uint256 _denorm) external onlyTokenBinder {
        IBPool bPool = lpbs().bPool;
        IERC20 token = IERC20(_token);
        token.transferFrom(msg.sender, address(this), _balance);
        token.approve(address(bPool), uint256(-1));
        bPool.bind(_token, _balance, _denorm);
    }

    /**
        @notice Rebind a token to the pool
        @param _token Token to bind
        @param _balance Amount to bind
        @param _denorm Denormalised weight
    */
    function rebind(address _token, uint256 _balance, uint256 _denorm) external onlyTokenBinder {
        IBPool bPool = lpbs().bPool;
        IERC20 token = IERC20(_token);
        
        // gulp old non acounted for token balance in the contract
        bPool.gulp(_token);

        uint256 oldBalance = token.balanceOf(address(bPool));
        // If tokens need to be pulled from msg.sender
        if(_balance > oldBalance) {
            token.transferFrom(msg.sender, address(this), bsub(_balance, oldBalance));
            token.approve(address(bPool), uint256(-1));
        }

        bPool.rebind(_token, _balance, _denorm);

        // If any tokens are in this contract send them to msg.sender
        uint256 tokenBalance = token.balanceOf(address(this));
        if(tokenBalance > 0) {
            token.transfer(msg.sender, tokenBalance);
        }
    }

    /**
        @notice Unbind a token
        @param _token Token to unbind
    */
    function unbind(address _token) external onlyTokenBinder {
        IBPool bPool = lpbs().bPool;
        IERC20 token = IERC20(_token);
        // unbind the token in the bPool
        bPool.unbind(_token);

        // If any tokens are in this contract send them to msg.sender
        uint256 tokenBalance = token.balanceOf(address(this));
        if(tokenBalance > 0) {
            token.transfer(msg.sender, tokenBalance);
        }
    }

    function getTokens() external view override returns(address[] memory) {
        return lpbs().bPool.getCurrentTokens();
    }

    /**
        @notice Gets the underlying assets and amounts to mint specific pool shares.
        @param _amount Amount of pool shares to calculate the values for
        @return tokens The addresses of the tokens
        @return amounts The amounts of tokens needed to mint that amount of pool shares
    */
    function calcTokensForAmount(uint256 _amount) external view override returns(address[] memory tokens, uint256[] memory amounts) {
        tokens = lpbs().bPool.getCurrentTokens();
        amounts = new uint256[](tokens.length);
        uint256 ratio = bdiv(_amount, totalSupply());

        for(uint256 i = 0; i < tokens.length; i ++) {
            address t = tokens[i];
            uint256 bal = lpbs().bPool.getBalance(t);
            uint256 amount = bmul(ratio, bal);
            amounts[i] = amount;
        }
    }

    /** 
        @notice Get the address of the controller
        @return The address of the pool
    */
    function getController() external view override returns(address) {
        return lpbs().controller;
    }

    /** 
        @notice Get the address of the public swap setter
        @return The public swap setter address
    */
    function getPublicSwapSetter() external view returns(address) {
        return lpbs().publicSwapSetter;
    }

    /**
        @notice Get the address of the token binder
        @return The token binder address
    */
    function getTokenBinder() external view returns(address) {
        return lpbs().tokenBinder;
    }

    /**
        @notice Get if public swapping is enabled
        @return If public swapping is enabled
    */
    function isPublicSwap() external view returns (bool) {
        return lpbs().bPool.isPublicSwap();
    }

    /**
        @notice Get the current swap fee
        @return The current swap fee
    */
    function getSwapFee() external view returns (uint256) {
        return lpbs().bPool.getSwapFee();
    }

    /**
        @notice Get the address of the underlying Balancer pool
        @return The address of the underlying balancer pool
    */
    function getBPool() external view returns(address) {
        return address(lpbs().bPool);
    }

    /**
        @notice Pull the underlying token from an address and rebind it to the balancer pool
        @param _token Address of the token to pull
        @param _from Address to pull the token from
        @param _amount Amount of token to pull
        @param _tokenBalance Balance of the token already in the balancer pool
    */
    function _pullUnderlying(address _token, address _from, uint256 _amount, uint256 _tokenBalance)
        internal
    {   
        IBPool bPool = lpbs().bPool;
        // Gets current Balance of token i, Bi, and weight of token i, Wi, from BPool.
        uint tokenWeight = bPool.getDenormalizedWeight(_token);

        bool xfer = IERC20(_token).transferFrom(_from, address(this), _amount);
        require(xfer, "ERR_ERC20_FALSE");
        bPool.rebind(_token, badd(_tokenBalance, _amount), tokenWeight);
    }

    /** 
        @notice Push a underlying token and rebind the token to the balancer pool
        @param _token Address of the token to push
        @param _to Address to pull the token to
        @param _amount Amount of token to push
        @param _tokenBalance Balance of the token already in the balancer pool
    */
    function _pushUnderlying(address _token, address _to, uint256 _amount, uint256 _tokenBalance)
        internal
    {   
        IBPool bPool = lpbs().bPool;
        // Gets current Balance of token i, Bi, and weight of token i, Wi, from BPool.
        uint tokenWeight = bPool.getDenormalizedWeight(_token);
        bPool.rebind(_token, bsub(_tokenBalance, _amount), tokenWeight);

        bool xfer = IERC20(_token).transfer(_to, _amount);
        require(xfer, "ERR_ERC20_FALSE");
    }

    /**
        @notice Pull pool shares
        @param _from Address to pull pool shares from
        @param _amount Amount of pool shares to pull
    */
    function _pullPoolShare(address _from, uint256 _amount)
        internal
    {
        _pull(_from, _amount);
    }

    /**
        @notice Burn pool shares
        @param _amount Amount of pool shares to burn
    */
    function _burnPoolShare(uint256 _amount)
        internal
    {
        _burn(_amount);
    }

    /** 
        @notice Mint pool shares 
        @param _amount Amount of pool shares to mint
    */
    function _mintPoolShare(uint256 _amount)
        internal
    {
        _mint(_amount);
    }

    /**
        @notice Push pool shares to account
        @param _to Address to push the pool shares to
        @param _amount Amount of pool shares to push
    */
    function _pushPoolShare(address _to, uint256 _amount)
        internal
    {
        _push(_to, _amount);
    }

    /**
        @notice Load PBasicPool storage
        @return s Pointer to the storage struct
    */
    function lpbs() internal pure returns (pbs storage s) {
        bytes32 loc = pbsSlot;
        assembly {
            s_slot := loc
        }
    }

}


// File contracts/smart-pools/PCappedSmartPool.sol

pragma solidity ^0.6.4;

contract PCappedSmartPool is PBasicSmartPool {

    bytes32 constant public pcsSlot = keccak256("PCappedSmartPool.storage.location");

    event CapChanged(address indexed setter, uint256 oldCap, uint256 newCap);

    struct pcs {
        uint256 cap;
    }

    modifier withinCap() {
        _;
        require(totalSupply() < lpcs().cap, "PCappedSmartPool.withinCap: Cap limit reached");
    }

    /**
        @notice Set the maximum cap of the contract
        @param _cap New cap in wei
    */
    function setCap(uint256 _cap) onlyController external {
        emit CapChanged(msg.sender, lpcs().cap, _cap);
        lpcs().cap = _cap;
    }

    /**
        @notice Takes underlying assets and mints smart pool tokens. Enforces the cap
        @param _amount Amount of pool tokens to mint
    */
    function joinPool(uint256 _amount) external override withinCap {
        super._joinPool(_amount);
    }


    /**
        @notice Get the current cap
        @return The current cap in wei
    */
    function getCap() external view returns(uint256) {
        return lpcs().cap;
    }

    /**
        @notice Load the PCappedSmartPool storage
        @return s Pointer to the storage struct
    */
    function lpcs() internal pure returns (pcs storage s) {
        bytes32 loc = pcsSlot;
        assembly {
            s_slot := loc
        }
    }

}


// File contracts/factory/PProxiedFactory.sol

pragma solidity ^0.6.4;







contract PProxiedFactory is Ownable {

    IBFactory public balancerFactory;
    address public smartPoolImplementation;
    mapping(address => bool) public isPool;
    address[] public pools;

    event SmartPoolCreated(address indexed poolAddress, string name, string symbol);

    function init(address _balancerFactory) public {
        require(smartPoolImplementation == address(0), "Already initialised");
        _setOwner(msg.sender);
        balancerFactory = IBFactory(_balancerFactory);
        
        PCappedSmartPool implementation = new PCappedSmartPool();
        // function init(address _bPool, string calldata _name, string calldata _symbol, uint256 _initialSupply) external {
        implementation.init(address(0), "IMPL", "IMPL", 1 ether);
        smartPoolImplementation = address(implementation);
    }

    function newProxiedSmartPool(
        string memory _name, 
        string memory _symbol,
        uint256 _initialSupply,
        address[] memory _tokens,
        uint256[] memory _amounts,
        uint256[] memory _weights,
        uint256 _cap
    ) public onlyOwner returns(address) {
        // Deploy proxy contract
        PProxyPausable proxy = new PProxyPausable();
        
        // Setup proxy
        proxy.setImplementation(smartPoolImplementation);
        proxy.setPauzer(msg.sender);
        proxy.setProxyOwner(msg.sender); 
        
        // Setup balancer pool
        address balancerPoolAddress = balancerFactory.newBPool();
        IBPool bPool = IBPool(balancerPoolAddress);

        for(uint256 i = 0; i < _tokens.length; i ++) {
            IERC20 token = IERC20(_tokens[i]);
            // Transfer tokens to this contract
            token.transferFrom(msg.sender, address(this), _amounts[i]);
            // Approve the balancer pool
            token.approve(balancerPoolAddress, uint256(-1));
            // Bind tokens
            bPool.bind(_tokens[i], _amounts[i], _weights[i]);
        }
        bPool.setController(address(proxy));
        
        // Setup smart pool
        PCappedSmartPool smartPool = PCappedSmartPool(address(proxy));
    
        smartPool.init(balancerPoolAddress, _name, _symbol, _initialSupply);
        smartPool.setCap(_cap);
        smartPool.setPublicSwapSetter(msg.sender);
        smartPool.setTokenBinder(msg.sender);
        smartPool.setController(msg.sender);
        smartPool.approveTokens();
        
        isPool[address(smartPool)] = true;
        pools.push(address(smartPool));

        emit SmartPoolCreated(address(smartPool), _name, _symbol);

        smartPool.transfer(msg.sender, _initialSupply);

        return address(smartPool);
    }

}


// File contracts/interfaces/IUniswapFactory.sol

pragma solidity ^0.6.4;

interface IUniswapFactory {
    // Create Exchange
    function createExchange(address token) external returns (address exchange);
    // Get Exchange and Token Info
    function getExchange(address token) external view returns (address exchange);
    function getToken(address exchange) external view returns (address token);
    function getTokenWithId(uint256 tokenId) external view returns (address token);
    // Never use
    function initializeFactory(address template) external;
}


// File contracts/interfaces/IUniswapExchange.sol

pragma solidity ^0.6.4;

interface IUniswapExchange {
    // Address of ERC20 token sold on this exchange
    function tokenAddress() external view returns (address token);
    // Address of Uniswap Factory
    function factoryAddress() external view returns (address factory);
    // Provide Liquidity
    function addLiquidity(uint256 min_liquidity, uint256 max_tokens, uint256 deadline) external payable returns (uint256);
    function removeLiquidity(uint256 amount, uint256 min_eth, uint256 min_tokens, uint256 deadline) external returns (uint256, uint256);
    // Get Prices
    function getEthToTokenInputPrice(uint256 eth_sold) external view returns (uint256 tokens_bought);
    function getEthToTokenOutputPrice(uint256 tokens_bought) external view returns (uint256 eth_sold);
    function getTokenToEthInputPrice(uint256 tokens_sold) external view returns (uint256 eth_bought);
    function getTokenToEthOutputPrice(uint256 eth_bought) external view returns (uint256 tokens_sold);
    // Trade ETH to ERC20
    function ethToTokenSwapInput(uint256 min_tokens, uint256 deadline) external payable returns (uint256  tokens_bought);
    function ethToTokenTransferInput(uint256 min_tokens, uint256 deadline, address recipient) external payable returns (uint256  tokens_bought);
    function ethToTokenSwapOutput(uint256 tokens_bought, uint256 deadline) external payable returns (uint256  eth_sold);
    function ethToTokenTransferOutput(uint256 tokens_bought, uint256 deadline, address recipient) external payable returns (uint256  eth_sold);
    // Trade ERC20 to ETH
    function tokenToEthSwapInput(uint256 tokens_sold, uint256 min_eth, uint256 deadline) external returns (uint256  eth_bought);
    function tokenToEthTransferInput(uint256 tokens_sold, uint256 min_eth, uint256 deadline, address recipient) external returns (uint256  eth_bought);
    function tokenToEthSwapOutput(uint256 eth_bought, uint256 max_tokens, uint256 deadline) external returns (uint256  tokens_sold);
    function tokenToEthTransferOutput(uint256 eth_bought, uint256 max_tokens, uint256 deadline, address recipient) external returns (uint256  tokens_sold);
    // Trade ERC20 to ERC20
    function tokenToTokenSwapInput(uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address token_addr) external returns (uint256  tokens_bought);
    function tokenToTokenTransferInput(uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address token_addr) external returns (uint256  tokens_bought);
    function tokenToTokenSwapOutput(uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address token_addr) external returns (uint256  tokens_sold);
    function tokenToTokenTransferOutput(uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address token_addr) external returns (uint256  tokens_sold);
    // Trade ERC20 to Custom Pool
    function tokenToExchangeSwapInput(uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address exchange_addr) external returns (uint256  tokens_bought);
    function tokenToExchangeTransferInput(uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address exchange_addr) external returns (uint256  tokens_bought);
    function tokenToExchangeSwapOutput(uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address exchange_addr) external returns (uint256  tokens_sold);
    function tokenToExchangeTransferOutput(uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address exchange_addr) external returns (uint256  tokens_sold);
    // ERC20 comaptibility for liquidity tokens
    // bytes32 public name;
    // bytes32 public symbol;
    // uint256 public decimals;
    function transfer(address _to, uint256 _value) external returns (bool);
    function transferFrom(address _from, address _to, uint256 value) external returns (bool);
    function approve(address _spender, uint256 _value) external returns (bool);
    function allowance(address _owner, address _spender) external view returns (uint256);
    function balanceOf(address _owner) external view returns (uint256);
    function totalSupply() external view returns (uint256);
    // Never use
    function setup(address token_addr) external;
}


// File contracts/recipes/PUniswapPoolRecipe.sol

pragma solidity ^0.6.4;





// Takes ETH and mints smart pool tokens
contract PUniswapPoolRecipe {
    
    bytes32 constant public uprSlot = keccak256("PUniswapPoolRecipe.storage.location");

    // Uniswap pool recipe struct
    struct uprs {
        IPSmartPool pool;
        IUniswapFactory uniswapFactory;
    }

    function init(address _pool, address _uniswapFactory) public virtual {
        uprs storage s = luprs();
        require(address(s.pool) == address(0), "already initialised");
        s.pool = IPSmartPool(_pool);
        s.uniswapFactory = IUniswapFactory(_uniswapFactory);
    }

    // Using same interface as Uniswap for compatibility
    function ethToTokenTransferOutput(uint256 _tokens_bought, uint256 _deadline, address _recipient) public payable returns (uint256  eth_sold) {
        uprs storage s = luprs();
        require(_deadline >= block.timestamp);
        (address[] memory tokens, uint256[] memory amounts) = s.pool.calcTokensForAmount(_tokens_bought);

        eth_sold = 0;
        // Buy and approve tokens
        for(uint256 i = 0; i < tokens.length; i ++) {
            eth_sold += _ethToToken(tokens[i], amounts[i]);
            IERC20(tokens[i]).approve(address(s.pool), uint256(-1));
        }

        // Calculate amount of eth sold
        eth_sold = msg.value - address(this).balance;
        // Send back excess eth
        msg.sender.transfer(address(this).balance);

        // Join pool
        s.pool.joinPool(_tokens_bought);

        // Send pool tokens to receiver
        s.pool.transfer(_recipient, s.pool.balanceOf(address(this)));
        return eth_sold;
    }

    function ethToTokenSwapOutput(uint256 _tokens_bought, uint256 _deadline) external payable returns (uint256 eth_sold) {
        return ethToTokenTransferOutput(_tokens_bought, _deadline, msg.sender);
    }

    function _ethToToken(address _token, uint256 _tokens_bought) internal virtual returns (uint256) {
        uprs storage s = luprs();
        IUniswapExchange exchange = IUniswapExchange(s.uniswapFactory.getExchange(_token));
        return exchange.ethToTokenSwapOutput{value: address(this).balance}(_tokens_bought, uint256(-1));
    }

    function getEthToTokenOutputPrice(uint256 _tokens_bought) external view virtual returns (uint256 eth_sold) {
        uprs storage s = luprs();
        (address[] memory tokens, uint256[] memory amounts) = s.pool.calcTokensForAmount(_tokens_bought);

        eth_sold = 0;

        for(uint256 i = 0; i < tokens.length; i ++) {
            IUniswapExchange exchange = IUniswapExchange(s.uniswapFactory.getExchange(tokens[i]));
            eth_sold += exchange.getEthToTokenOutputPrice(amounts[i]);
        }

        return eth_sold;
    }

    function tokenToEthTransferInput(uint256 _tokens_sold, uint256 _min_eth, uint256 _deadline, address _recipient) public returns (uint256 eth_bought) {
        uprs storage s = luprs();
        require(_deadline >= block.timestamp);
        require(s.pool.transferFrom(msg.sender, address(this), _tokens_sold), "PUniswapPoolRecipe.tokenToEthTransferInput: transferFrom failed");

        s.pool.exitPool(_tokens_sold);

        address[] memory tokens = s.pool.getTokens();

        uint256 ethAmount = 0;

        for(uint256 i = 0; i < tokens.length; i ++) {
            IERC20 token = IERC20(tokens[i]);
            
            uint256 balance = token.balanceOf(address(this));
           
            // Exchange for ETH
            ethAmount += _tokenToEth(token, balance, _recipient);
        }

        require(ethAmount > _min_eth, "PUniswapPoolRecipe.tokenToEthTransferInput: not enough ETH");
        return ethAmount;
    }

    function tokenToEthSwapInput(uint256 _tokens_sold, uint256 _min_eth, uint256 _deadline) external returns (uint256 eth_bought) {
        return tokenToEthTransferInput(_tokens_sold, _min_eth, _deadline, msg.sender);
    }

    function _tokenToEth(IERC20 _token, uint256 _tokens_sold, address _recipient) internal virtual returns (uint256 eth_bought) {
        uprs storage s = luprs();
        IUniswapExchange exchange = IUniswapExchange(s.uniswapFactory.getExchange(address(_token)));
        _token.approve(address(exchange), _tokens_sold);
        // Exchange for ETH
        return exchange.tokenToEthTransferInput(_tokens_sold, 1, uint256(-1), _recipient);
    }

    function getTokenToEthInputPrice(uint256 _tokens_sold) external view virtual returns (uint256 eth_bought) {
        uprs storage s = luprs();
        (address[] memory tokens, uint256[] memory amounts) = s.pool.calcTokensForAmount(_tokens_sold);

        eth_bought = 0;

        for(uint256 i = 0; i < tokens.length; i ++) {
            IUniswapExchange exchange = IUniswapExchange(s.uniswapFactory.getExchange(address(tokens[i])));
            eth_bought += exchange.getTokenToEthInputPrice(amounts[i]);
        }

        return eth_bought;
    }

    function pool() external view returns (address) {
        return address(luprs().pool);
    }

    receive() external payable {

    }

    // Load uniswap pool recipe
    function luprs() internal pure returns (uprs storage s) {
        bytes32 loc = uprSlot;
        assembly {
            s_slot := loc
        }
    }
}


// File contracts/interfaces/IKyberNetwork.sol

pragma solidity ^0.6.4;

interface IKyberNetwork {

    function trade(
        address src,
        uint srcAmount,
        address dest,
        address payable destAddress,
        uint maxDestAmount,
        uint minConversionRate,
        address walletId
    ) external payable returns(uint256);
}


// File contracts/recipes/PUniswapKyberPoolRecipe.sol

pragma solidity ^0.6.4;




contract PUniswapKyberPoolRecipe is PUniswapPoolRecipe, Ownable {

    bytes32 constant public ukprSlot = keccak256("PUniswapKyberPoolRecipe.storage.location");

    // Uniswap pool recipe struct
    struct ukprs {
        mapping(address => bool) swapOnKyber;
        IKyberNetwork kyber;
        address feeReceiver;
    }

    address public constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
    
    function init(address, address) public override {
        require(false, "not enabled");
    }

    // Use seperate init function
    function initUK(address _pool, address _uniswapFactory, address _kyber, address[] memory _swapOnKyber, address _feeReciever) public {
        // UnsiwapRecipe enforces that init can only be called once
        ukprs storage s = lukprs();

        PUniswapPoolRecipe.init(_pool, _uniswapFactory);
        s.kyber = IKyberNetwork(_kyber);
        s.feeReceiver = _feeReciever;

        _setOwner(msg.sender);

        for(uint256 i = 0; i < _swapOnKyber.length; i ++) {
            s.swapOnKyber[_swapOnKyber[i]] = true;
        }
    }

    function setKyberSwap(address _token, bool _value) external onlyOwner {
        ukprs storage s = lukprs();
        s.swapOnKyber[_token] = _value;
    }

    function _ethToToken(address _token, uint256 _tokens_bought) internal override returns (uint256) {
        ukprs storage s = lukprs();
        if(!s.swapOnKyber[_token]) {
            return super._ethToToken(_token, _tokens_bought);
        }

        uint256 ethBefore = address(this).balance;
        s.kyber.trade{value: address(this).balance}(ETH, address(this).balance, _token, address(this), _tokens_bought, 1, s.feeReceiver);
        uint256 ethAfter = address(this).balance;

        // return amount of ETH spend
        return ethBefore - ethAfter;
    }

    function _tokenToEth(IERC20 _token, uint256 _tokens_sold, address _recipient) internal override returns (uint256 eth_bought) {
        ukprs storage s = lukprs();
        if(!s.swapOnKyber[address(_token)]) {
            return super._tokenToEth(_token, _tokens_sold, _recipient);
        }

        uint256 ethBefore = address(this).balance;
        _token.approve(address(s.kyber), uint256(-1));
        s.kyber.trade(address(_token), _tokens_sold, ETH, address(this), uint256(-1), 1, s.feeReceiver);
        uint256 ethAfter = address(this).balance;

        // return amount of ETH received
        return ethAfter - ethBefore;
    }

    // Load uniswap pool recipe
    function lukprs() internal pure returns (ukprs storage s) {
        bytes32 loc = ukprSlot;
        assembly {
            s_slot := loc
        }
    }

}


// File contracts/test/TestReentryProtection.sol

pragma solidity ^0.6.4;


contract TestReentryProtection is ReentryProtection {

    // This should fail
    function test() external noReentry {
        reenter();
    }

    function reenter() public noReentry {
        // Do nothing
    }

}

• No Contract Security Audit Submitted- Submit Audit Here

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