Contract 0xd3695D5eA14E4958AEE9F6128D4C71B21F094dC4

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0x866c42e919a82f727cc97ada13e3ce179bcd06ff490c9454f59981412a8e73ba25739542022-09-15 20:17:54146 days 36 mins ago 0x6b6071ccc534fcee7b699aab87929faf8806d5bd  Contract Creation0 MOVR
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Note: This contract matches the deployed ByteCode of the Source Code for Contract 0xCE21B290B23AcB2A7AA2f8BF2c21ACBa3A9aE75a

Contract Name:
ZirconPair

Compiler Version
v0.5.16+commit.9c3226ce

Optimization Enabled:
Yes with 1 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 10 : ZirconPair.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.5.16;

import './libraries/Math.sol';
import './libraries/UQ112x112.sol';
//import './interfaces/IERC20.sol';
import './interfaces/IZirconPair.sol';
import '@uniswap/v2-core/contracts/interfaces/IUniswapV2Callee.sol';
import './libraries/SafeMath.sol';
import "./ZirconERC20.sol";
import "./interfaces/IZirconFactory.sol";
import '@uniswap/v2-core/contracts/interfaces/IUniswapV2ERC20.sol';

//import "./libraries/ZirconLibrary.sol";
import "./energy/interfaces/IZirconEnergyRevenue.sol";

contract ZirconPair is IZirconPair, ZirconERC20 { //Name change does not affect ABI
    using SafeMath for uint;
    using UQ112x112 for uint224;

    uint public constant MINIMUM_LIQUIDITY = 10**3;
    bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));

    address public factory;
    address public token0;
    address public token1;

    address public energyRevenueAddress;

    uint112 private reserve0;           // uses single storage slot, accessible via getReserves
    uint112 private reserve1;           // us es single storage slot, accessible via getReserves
    uint32 private blockTimestampLast; // uses single storage slot, accessible via getReserves

    uint public price0CumulativeLast;
    uint public price1CumulativeLast;
    uint public kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event

    uint private unlocked = 1;
    modifier lock() {
        require(unlocked == 1, 'UniswapV2: LOCKED');
        unlocked = 0;
        _;
        unlocked = 1;
    }

    function getReserves()  public view returns  (uint112 _reserve0, uint112 _reserve1, uint32 _blockTimestampLast) {
        _reserve0 = reserve0;
        _reserve1 = reserve1;
        _blockTimestampLast = blockTimestampLast;
    }

    function _safeTransfer(address token, address to, uint value) private {
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'UniswapV2: TRANSFER_FAILED');
    }

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);


    constructor() public {
        factory = msg.sender;
    }

    function tryLock() external lock {}

    // called once by the factory at time of deployment
    function initialize(address _token0, address _token1, address _energy) external {
        require(msg.sender == factory, 'ZirconPair: FORBIDDEN'); // sufficient check
        token0 = _token0;
        token1 = _token1;
        energyRevenueAddress = _energy;
    }

    // update reserves and, on the first call per block, price accumulators
    function _update(uint balance0, uint balance1,
        uint112 _reserve0, uint112 _reserve1) private {
        require(balance0 <= uint112(-1) && balance1 <= uint112(-1), 'UniswapV2: OVERFLOW');
        uint32 blockTimestamp = uint32(block.timestamp % 2**32);
        uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired

        if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
            // * never overflows, and + overflow is desired
            price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed;
            price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed;
        }
        reserve0 = uint112(balance0);
        reserve1 = uint112(balance1);
        blockTimestampLast = blockTimestamp;
        emit Sync(reserve0, reserve1);
    }

    //Wrapper around mintFee primarily aimed to be called by Pylon
    //Access control is unnecessary, if anyone calls it they just waste gas compounding fees for us
    //The wrapper is necessary to make sure the reserves it passes to mintFee are actual
    function publicMintFee() external lock {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves();

        _mintFee(_reserve0, _reserve1);

        kLast = uint(reserve0).mul(reserve1); //Reserves don't change from mintFee
    }

    // if fee is on, mint liquidity equivalent to 1/6th of the growth in sqrt(k)
    function _mintFee(uint112 _reserve0, uint112 _reserve1) private {
    uint _kLast = kLast; // gas savings
        if (_kLast != 0) {
            uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));
            uint rootKLast = Math.sqrt(_kLast);
            if (rootK > rootKLast) {
                uint dynamicRatio = IZirconFactory(factory).dynamicRatio();
                uint numerator = (rootK.sub(rootKLast)).mul(1e18);
                uint denominator = rootK.mul(dynamicRatio).add(rootKLast);
                uint liquidityPercentage = numerator / denominator;

                if (liquidityPercentage > 0) {
                    //                    console.log("C ore: liqPercentage", liquidityPercentage);
                    _mint(energyRevenueAddress, liquidityPercentage.mul(totalSupply)/1e18);
                    //                    _mint(energyRevenueAddress, liquidityPercentage.mul(totalSupply)/1e18);
                    uint totalPercentage = ((rootK.sub(rootKLast)).mul(1e18))/rootKLast;
                    IZirconEnergyRevenue(energyRevenueAddress).calculate(totalPercentage.sub(liquidityPercentage));
                }
            }
        }
    }

    // this low-level function should be called from a contract which performs important safety checks
    function mint(address to) external lock returns (uint liquidity) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        uint balance0 = IUniswapV2ERC20(token0).balanceOf(address(this));
        uint balance1 = IUniswapV2ERC20(token1).balanceOf(address(this));
        uint amount0 = balance0.sub(_reserve0);
        uint amount1 = balance1.sub(_reserve1);

        _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        if (_totalSupply == 0) {
            liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
            _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
        } else {
            liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);
        }
        require(liquidity > 0, 'UniswapV2: INSUFFICIENT_LIQUIDITY_MINTED');
        _mint(to, liquidity);

        _update(balance0, balance1, _reserve0, _reserve1);
        kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Mint(msg.sender, amount0, amount1);
    }

    // this low-level function should be called from a contract which performs important safety checks
    // TODO: will be better if we pass the output amount
    function mintOneSide(address to, bool isReserve0) external lock returns (uint liquidity, uint amount0, uint amount1) {
        require(totalSupply > 0, 'UniswapV2: Use mint to start pair');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings

        uint balance0 = IUniswapV2ERC20(token0).balanceOf(address(this));
        uint balance1 = IUniswapV2ERC20(token1).balanceOf(address(this));
        amount0 = balance0.sub(_reserve0);
        amount1 = balance1.sub(_reserve1);

        uint _liquidityFee = IZirconFactory(factory).liquidityFee();
        uint k;

        //We use growth in sqrt(k) to calculate amount of pool tokens to mint. This implicitly takes care of slippage.
        //Fee is slightly more than half total amount to account for residue you'd have if you swapped then minted normally

        if (isReserve0){
            require(amount0 > 1, "ZP: Insufficient Amount");
            k = Math.sqrt(uint(reserve0 + (amount0.mul(10000-(_liquidityFee/2 + 1))/10000)).mul(balance1));
        }else{
            require(amount1 > 1, "ZP: Insufficient Amount");
            k = Math.sqrt(balance0.mul(uint(reserve1 + (amount1.mul(10000-(_liquidityFee/2 + 1))/10000))));
        }
        uint kBefore = Math.sqrt(uint(reserve0).mul(reserve1));

        uint numerator = (k.sub(kBefore)).mul(totalSupply);
        uint denominator = kBefore;
        liquidity = numerator / denominator;
        reserve0 = uint112(balance0);
        reserve1 = uint112(balance1);
        _mintFee(_reserve0, _reserve1);

        require(liquidity > 0, 'UniswapV2: INSUFFICIENT_LIQUIDITY_MINTED');
        _mint(to, liquidity);
        _update(balance0, balance1, _reserve0, _reserve1);
        kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Mint(msg.sender, amount0, amount1);
    }

    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut, uint fee) internal pure returns (uint amountOut) {
        require(amountIn > 0, 'UV2: IIA');
        require(reserveIn > 0 && reserveOut > 0, 'UV2: IL');
        uint amountInWithFee = amountIn.mul(10000-fee);
        uint numerator = amountInWithFee.mul(reserveOut);
        uint denominator = reserveIn.mul(10000).add(amountInWithFee);
        amountOut = numerator / denominator;
    }

    // this low-level function should be called from a contract which performs important safety checks
    // TODO: Test this function
    // TODO: maybe allow burning both sides to one
    function burnOneSide(address to, bool isReserve0) external lock returns (uint amount) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        address _token0 = token0;                                // gas savings
        address _token1 = token1;                                // gas savings
        uint amount0;
        uint amount1;
        uint balance0 = IUniswapV2ERC20(_token0).balanceOf(address(this));
        uint balance1 = IUniswapV2ERC20(_token1).balanceOf(address(this));
        uint liquidity = balanceOf[address(this)];
        uint _liquidityFee = IZirconFactory(factory).liquidityFee();

        _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution
        amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution
        if (isReserve0) {
            amount0 += getAmountOut(amount1, _reserve1 - amount1, _reserve0 - amount0, _liquidityFee);
            amount = amount0;
            require(amount < balance0, "UniswapV2: EXTENSION_NOT_ENOUGH_LIQUIDITY");
        }else{
            amount1 += getAmountOut(amount0, _reserve0 - amount0, _reserve1 - amount1, _liquidityFee);
            amount = amount1;
            require(amount < balance1, "UniswapV2: EXTENSION_NOT_ENOUGH_LIQUIDITY");
        }
        require(amount0 > 0 && amount1 > 0, 'UniswapV2: INSUFFICIENT_LIQUIDITY_BURNED');
        _burn(address(this), liquidity);
        if (isReserve0) {
            _safeTransfer(_token0, to, amount);
        }else{
            _safeTransfer(_token1, to, amount);
        }
        balance0 = IUniswapV2ERC20(_token0).balanceOf(address(this));
        balance1 = IUniswapV2ERC20(_token1).balanceOf(address(this));

        _update(balance0, balance1, _reserve0, _reserve1);
        kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Burn(msg.sender, amount0, amount1, to);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function burn(address to) external lock returns (uint amount0, uint amount1) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        address _token0 = token0;                                // gas savings
        address _token1 = token1;                                // gas savings
        uint balance0 = IUniswapV2ERC20(_token0).balanceOf(address(this));
        uint balance1 = IUniswapV2ERC20(_token1).balanceOf(address(this));
        uint liquidity = balanceOf[address(this)];
        _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution
        amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution
        require(amount0 > 0 && amount1 > 0, 'UniswapV2: INSUFFICIENT_LIQUIDITY_BURNED');
        _burn(address(this), liquidity);
        _safeTransfer(_token0, to, amount0);
        _safeTransfer(_token1, to, amount1);
        balance0 = IUniswapV2ERC20(_token0).balanceOf(address(this));
        balance1 = IUniswapV2ERC20(_token1).balanceOf(address(this));

        _update(balance0, balance1, _reserve0, _reserve1);
        kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Burn(msg.sender, amount0, amount1, to);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data)  external lock {
        require(amount0Out > 0 || amount1Out > 0, 'UniswapV2: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'UniswapV2: INSUFFICIENT_LIQUIDITY');

        uint balance0;
        uint balance1;
        { // scope for _token{0,1}, avoids stack too deep errors
            address _token0 = token0;
            address _token1 = token1;
            require(to != _token0 && to != _token1, 'UniswapV2: INVALID_TO');
            if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out);
            // optimistically transfer tokens
            if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out);
            // optimistically transfer tokens
            if (data.length > 0) IUniswapV2Callee(to).uniswapV2Call(msg.sender, amount0Out, amount1Out, data);
            balance0 = IUniswapV2ERC20(_token0).balanceOf(address(this));
            balance1 = IUniswapV2ERC20(_token1).balanceOf(address(this));
        }
        uint amount0In = balance0 > _reserve0 - amount0Out ? balance0 - (_reserve0 - amount0Out) : 0;
        uint amount1In = balance1 > _reserve1 - amount1Out ? balance1 - (_reserve1 - amount1Out) : 0;
        require(amount0In > 0 || amount1In > 0, 'UniswapV2: INSUFFICIENT_INPUT_AMOUNT');
        { // scope for reserve{0,1}Adjusted, avoids stack too deep errors
            uint _liquidityFee = IZirconFactory(factory).liquidityFee();
            uint balance0Adjusted = balance0.mul(10000).sub(amount0In.mul(_liquidityFee));
            uint balance1Adjusted = balance1.mul(10000).sub(amount1In.mul(_liquidityFee));
            require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(10000**2), 'UniswapV2: K');
        }

        _update(balance0, balance1, _reserve0, _reserve1);
        emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);
    }

    // force balances to match reserves
//    function skim(address to)  external lock {
//        address _token0 = token0; // gas savings
//        address _token1 = token1; // gas savings
//        _safeTransfer(_token0, to, IUniswapV2ERC20(_token0).balanceOf(address(this)).sub(reserve0));
//        _safeTransfer(_token1, to, IUniswapV2ERC20(_token1).balanceOf(address(this)).sub(reserve1));
//    }

    // force reserves to match balances
    function sync() external lock {
        _update(IUniswapV2ERC20(token0).balanceOf(address(this)), IUniswapV2ERC20(token1).balanceOf(address(this)), reserve0, reserve1);
    }

    function changeEnergyRevAddress(address _revAddress) external {
        require(msg.sender == factory, 'UniswapV2: NOT_ALLOWED');
        energyRevenueAddress = _revAddress;
    }
}

File 2 of 10 : Math.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.5.16;
// a library for performing various math operations
library Math {
    function min(uint x, uint y) internal pure returns (uint z) {
        z = x < y ? x : y;
    }
    function max(uint x, uint y) internal pure returns (uint z) {
        z = x > y ? x : y;
    }
    // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
    function sqrt(uint y) internal pure returns (uint z) {
        if (y > 3) {
            z = y;
            uint x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }
}

File 3 of 10 : UQ112x112.sol
// SPDX-License-Identifier: GPL-3.0

pragma solidity =0.5.16;

// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))

// range: [0, 2**112 - 1]
// resolution: 1 / 2**112

library UQ112x112 {
    uint224 constant Q112 = 2**112;

    // encode a uint112 as a UQ112x112
    function encode(uint112 y) internal pure returns (uint224 z) {
        z = uint224(y) * Q112; // never overflows
    }

    // divide a UQ112x112 by a uint112, returning a UQ112x112
    function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
        z = x / uint224(y);
    }
}

File 4 of 10 : IZirconPair.sol
// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.5.16;

interface IZirconPair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function energyRevenueAddress() external pure returns (address);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

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

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

    function burnOneSide(address to, bool isReserve0) external returns (uint amount);
    function mintOneSide(address to, bool isReserve0) external returns (uint liquidity, uint amount0, uint amount1);
    function publicMintFee() external;
    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
//    function skim(address to) external;
    function sync() external;

    function tryLock() external;

    function initialize(address, address, address) external;
    function changeEnergyRevAddress(address _revAddress) external;

}

File 5 of 10 : IUniswapV2Callee.sol
pragma solidity >=0.5.0;

interface IUniswapV2Callee {
    function uniswapV2Call(address sender, uint amount0, uint amount1, bytes calldata data) external;
}

File 6 of 10 : SafeMath.sol
// SPDX-License-Identifier: GPL-3.0

pragma solidity =0.5.16;

// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)

library SafeMath {
    function add(uint x, uint y) internal pure returns (uint z) {
        require((z = x + y) >= x, 'ds-math-add-overflow');
    }

    function sub(uint x, uint y) internal pure returns (uint z) {
        require((z = x - y) <= x, 'ds-math-sub-underflow');
    }

    function mul(uint x, uint y) internal pure returns (uint z) {
        require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
    }
}

File 7 of 10 : ZirconERC20.sol
pragma solidity =0.5.16;
import './libraries/SafeMath.sol';
import '@uniswap/v2-core/contracts/interfaces/IUniswapV2ERC20.sol';

contract ZirconERC20 is IUniswapV2ERC20 {
    using SafeMath for uint;
    // TODO: change name of token
    string public constant name = 'Zircon';
    string public constant symbol = 'ZPT';
    uint8 public constant decimals = 18;
    uint public totalSupply;
    mapping(address => uint)  public balanceOf;
    mapping(address => mapping(address => uint)) public allowance;
    // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
    mapping(address => uint) public nonces;
    bytes32 public DOMAIN_SEPARATOR;

    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    constructor() public {
        uint chainId;
        assembly {
            chainId := chainid()
        }
        DOMAIN_SEPARATOR = keccak256(
            abi.encode(
                keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),
                keccak256(bytes(name)),
                keccak256(bytes('1')),
                chainId,
                address(this)
            )
        );
    }

    function _mint(address to, uint value) internal {
        totalSupply = totalSupply.add(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(address(0), to, value);
    }

    function _burn(address from, uint value) internal {
        balanceOf[from] = balanceOf[from].sub(value);
        totalSupply = totalSupply.sub(value);
        emit Transfer(from, address(0), value);
    }

    function _approve(address owner, address spender, uint value) private {
        allowance[owner][spender] = value;
        emit Approval(owner, spender, value);
    }

    function _transfer(address from, address to, uint value) private {
        balanceOf[from] = balanceOf[from].sub(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(from, to, value);
    }

    function approve(address spender, uint value) external returns (bool) {
        _approve(msg.sender, spender, value);
        return true;
    }

    function transfer(address to, uint value) external returns (bool) {
        _transfer(msg.sender, to, value);
        return true;
    }

    function transferFrom(address from, address to, uint value) external returns (bool) {
        if (allowance[from][msg.sender] != uint(-1)) {
            allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);
        }
        _transfer(from, to, value);
        return true;
    }

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external {
        require(deadline >= block.timestamp, 'UniswapV2: EXPIRED');
        bytes32 digest = keccak256(
            abi.encodePacked(
                '\x19\x01',
                DOMAIN_SEPARATOR,
                keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
            )
        );
        address recoveredAddress = ecrecover(digest, v, r, s);
        require(recoveredAddress != address(0) && recoveredAddress == owner, 'UniswapV2: INVALID_SIGNATURE');
        _approve(owner, spender, value);
    }
}

File 8 of 10 : IZirconFactory.sol
pragma solidity >=0.5.16;

interface IZirconFactory {
    //    function feeTo() external view returns (address);
    //    function feeToSetter() external view returns (address);
    //    function migrator() external view returns (address);
    function energyFactory() external view returns (address);

    function getPair(address, address) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);
    function dynamicRatio() external view returns (uint);
    function liquidityFee() external view returns (uint);
    function setLiquidityFee(uint _liquidityFee) external;

    function pairCodeHash() external pure returns (bytes32);
    function createPair(address tokenA, address tokenB, address _pylonFactory) external returns (address pair);

    function setMigrator(address _migrator) external;
    function setFeeToSetter(address _feeToSetter) external;
    function changeEnergyRevAddress(address _pairAddress, address _tokenA, address _tokenB, address _pylonFactory) external returns (address newEnergy);

    function changeEnergyFactoryAddress(address _newEnergyFactory) external;
    function setDynamicRatio(uint _dynamicRatio) external;

}

File 9 of 10 : IUniswapV2ERC20.sol
pragma solidity >=0.5.0;

interface IUniswapV2ERC20 {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint 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 (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

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

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
}

File 10 of 10 : IZirconEnergyRevenue.sol
pragma solidity =0.5.16;

interface IZirconEnergyRevenue {
    function initialize(address _pair, address _tokenA, address _tokenB, address energy0, address energy1, address pylon0, address pylon1) external;
    function calculate(uint percentage) external;
    function migrateLiquidity(address newEnergy) external;
    function getBalanceFromPair() external returns (uint);
    function feeValue1() external returns (uint);
    function feeValue0() external returns (uint);
    function getFees(address _token, uint _amount, address _to) external;
    function setFeeValue(uint _feeValue0, uint _feeValue1) external;
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 1
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

Contract ABI

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