Contract 0x1227a55a86aca0331e450ba6a3750054da35347d

Txn Hash Method
Block
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Value [Txn Fee]
0x4a8fca9a5566141c55db2a606a6e9d8a4ea7b92c5b0c52ddaafff987b8ca7a01Reinvest100910302022-01-26 18:25:127 hrs 47 mins ago0xdaa99a4826b3d0e9998cb55c8c648c53a5be677e IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.002337875821 25.090696435
0x3e793d1bb81ebbecc683fa7ce5ef7a684bbf09ee78e68f3f7ca5f4551e8d250cReinvest100910292022-01-26 18:25:117 hrs 47 mins ago0xba032c5b4aae3522d00f524365502e9e4e59f85e IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.0128009826 25.02
0x847e8f6a2548c1837d07a2c67e3af108b4d83db0168b01576048a5af3f39f5deReinvest100264162022-01-25 6:50:421 day 19 hrs ago0xdaa99a4826b3d0e9998cb55c8c648c53a5be677e IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.0123681953 25.01
0x74d68f1f570761dd7230638abc528b3a3d6c0cfcf6261e5750ad50f411877ce1Withdraw99970102022-01-24 14:44:302 days 11 hrs ago0x88036f9ad7309e6631a396cf09e41090a3fd6a48 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.007394396886 29.333416191
0x9f6146df0dc0d81cd285724cd55414ee1f59b1a028d035bd489431c41a150da9Reinvest99597502022-01-23 18:16:273 days 7 hrs ago0x5dc9f1dae6a2079a7451857d663096ab1fee7599 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.01236325 25
0x34c9b396290530906554792f85941292dfaa4399ac17e00843ffdd64b6c4900eDeposit99501942022-01-23 12:58:253 days 13 hrs ago0x8898439f013147eff40cf1d8254d17d8a565445d IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.00614355 25
0xf97b498944044ff02674489d5859c831b4db358ed9b5e3fd539c5da01bd2d23dDeposit With Per...99202452022-01-22 20:16:364 days 5 hrs ago0x88036f9ad7309e6631a396cf09e41090a3fd6a48 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.011271690687 39.954807462
0xa01f86757b135bd7e86d6803318ad81a24b5cd6e0423f537772fc933e8b8f9e7Reinvest98960962022-01-22 7:07:174 days 19 hrs ago0xdaa99a4826b3d0e9998cb55c8c648c53a5be677e IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.0123681953 25.01
0x0167af9848794b9833057ef3a6f79df44c9ac8ab55816bcaeabd60779b5e0a89Deposit With Per...98635522022-01-21 13:03:245 days 13 hrs ago0x88036f9ad7309e6631a396cf09e41090a3fd6a48 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.008827886473 31.292244804
0xbcf4258b7ddfc615948969991dbd5be5493301f39b3253068aa845ddb2c8142aDeposit With Per...98635522022-01-21 13:03:245 days 13 hrs ago0x88036f9ad7309e6631a396cf09e41090a3fd6a48 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.000787985 27.5
0x1f639474b97df8ff0eb0f5ee0876debf6dc253923d7efd675b2a6ce3c31cb39eReinvest98309122022-01-20 18:54:386 days 7 hrs ago0xdaa99a4826b3d0e9998cb55c8c648c53a5be677e IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.012363304398 25.000110001
0xbe3b09d5dbb0902b20facfc97c983f3a1facd0daa20a72864a7b4c1b7e1d1f60Deposit With Per...97885492022-01-19 19:00:017 days 7 hrs ago0x6f7d757e5f82535f80747cdba20030e747838694 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.007907775 25
0x63e26737ab60595b8451c5b3047d81731b9280d953ee349be7c6d59fe5b2ef0fReinvest97752462022-01-19 11:47:587 days 14 hrs ago0xdaa99a4826b3d0e9998cb55c8c648c53a5be677e IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.012363299453 25.0001
0x85707d137bf1479676796ab2c5d481c780e515ceeb8fed1ab69c7ffdce19bc4bDeposit With Per...97421432022-01-18 17:20:128 days 8 hrs ago0x88036f9ad7309e6631a396cf09e41090a3fd6a48 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.007480275 25
0x91392a500314596ca74574d79c3e9c764397ebff85e5cff7351cd7f9dcd565c0Deposit With Per...97397082022-01-18 15:58:548 days 10 hrs ago0x33521c5f12bb154216c426bf802140d349c97eb3 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.007108676662 25.197083055
0xe65de30b65d666259df92c55dfa315ed481a70b0b8d34fc021f04f5c9c5d01deReinvest97221972022-01-18 6:20:238 days 19 hrs ago0xdaa99a4826b3d0e9998cb55c8c648c53a5be677e IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.01279637793 25.011
0xa21d6026a88a5f39f24d4c0b3d1ae0d2da20680f30dac68ad528bdd581f478ddReinvest96623222022-01-16 21:09:4910 days 5 hrs ago0x7bfc4335299665fe78389912b3bb80ac06fc5c52 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.01209931794625.000140393
0x344e31f652f603ac0dbf74bd55b58997892e7ad8b2b2a265b8f87b217dbf45bcWithdraw96371522022-01-16 7:21:0910 days 18 hrs ago0xd781387001602d2bbe95891aa39c1c6b918762b2 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.005874525 25
0x27cb904f06070224e7d0e41d77ddefd0a96e90670c5533d405996e1f166f515fWithdraw96284712022-01-16 2:40:4810 days 23 hrs ago0x84024b5984d3355fe0e851403dafd12a05c07173 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.005874825 25
0xbdee6b7a11b5d87d1c66fdccba529e632eb40776c72c90956a3e66f37b5bb865Withdraw96258632022-01-16 1:17:1511 days 55 mins ago0x6a1b15b2abc4ac74246f37d1aa673926fce411ed IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.006302025 25
0xd5ac76a66ccb4554589b2326952c5253cea6ceb2e5fba2ce51224a81ed0dbcc7Reinvest96057482022-01-15 14:27:4811 days 11 hrs ago0x7bfc4335299665fe78389912b3bb80ac06fc5c52 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.01279599980325.010260938
0x76a872774b1f842fee84da3c834b812d7941bce0ccd7d87790b8d1fe9e457260Reinvest95449112022-01-14 5:21:1312 days 20 hrs ago0x7bfc4335299665fe78389912b3bb80ac06fc5c52 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.00198351938325.00118965
0x6cb4562eaa4eb8a4d2631b0f5b6c5c0f9d4ad8a8f24ff2a31359f1c696a46930Reinvest95449112022-01-14 5:21:1312 days 20 hrs ago0xdaa99a4826b3d0e9998cb55c8c648c53a5be677e IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.012368783617 25.01118965
0xae5f8ed5da03fa5d72d8482002a820ac77cc85e2ffd93d39b6099922abf7f8ebDeposit95193602022-01-13 15:25:4613 days 10 hrs ago0xee22b9596953b0705bb2dd6d598a07ef708d815d IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.0065710525
0xb95bd6fb476485438c1ebb82bb19783a81bc32ed46686dab9c4ae21c94667e7cReinvest94883302022-01-12 22:15:3814 days 3 hrs ago0x7bfc4335299665fe78389912b3bb80ac06fc5c52 IN  0x1227a55a86aca0331e450ba6a3750054da35347d0 AVAX0.01236349527425.000495974
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x698bceeE246934FbFFDbe222CC4444Ae7585C3cb

Contract Name:
JoeStrategyV3

Compiler Version
v0.7.3+commit.9bfce1f6

Optimization Enabled:
Yes with 999 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 12 : JoeStrategyV3.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

import "../YakStrategy.sol";
import "../interfaces/IJoeChef.sol";
import "../interfaces/IPair.sol";
import "../interfaces/IWAVAX.sol";
import "../interfaces/IERC20.sol";
import "../lib/DexLibrary.sol";

/**
 * @notice Strategy for Trader Joe, which includes optional and variable extra rewards
 * @dev Fees are paid in WAVAX
 */
contract JoeStrategyV3 is YakStrategy {
    using SafeMath for uint;

    IJoeChef public stakingContract;
    IPair private swapPairWAVAXJoe;
    IPair private swapPairExtraToken;
    IPair private swapPairToken0;
    IPair private swapPairToken1;
    IERC20 private poolRewardToken;
    uint public PID;
    IWAVAX private constant WAVAX = IWAVAX(0xB31f66AA3C1e785363F0875A1B74E27b85FD66c7);

    constructor (
        string memory _name,
        address _depositToken,
        address _poolRewardToken,
        address _rewardToken,
        address _stakingContract,
        address _swapPairWAVAXJoe,
        address _swapPairToken0,
        address _swapPairToken1,
        address _extraTokenSwapPair,
        uint pid,
        address _timelock,
        uint _minTokensToReinvest,
        uint _adminFeeBips,
        uint _devFeeBips,
        uint _reinvestRewardBips
    ) {
        name = _name;
        depositToken = IERC20(_depositToken);
        rewardToken = IERC20(_rewardToken);
        poolRewardToken = IERC20(_poolRewardToken);
        stakingContract = IJoeChef(_stakingContract);
        devAddr = msg.sender;
        PID = pid;

        assignSwapPairSafely(_swapPairWAVAXJoe, _extraTokenSwapPair, _swapPairToken0, _swapPairToken1);
        setAllowances();
        updateMinTokensToReinvest(_minTokensToReinvest);
        updateAdminFee(_adminFeeBips);
        updateDevFee(_devFeeBips);
        updateReinvestReward(_reinvestRewardBips);
        updateDepositsEnabled(true);
        transferOwnership(_timelock);

        emit Reinvest(0, 0);
    }

    /**
     * @notice Initialization helper for Pair deposit tokens
     * @dev Checks that selected Pairs are valid for trading reward tokens
     * @dev Assigns values to swapPairToken0 and swapPairToken1
     */
    function assignSwapPairSafely(address _swapPairWAVAXJoe, address _extraTokenSwapPair, address _swapPairToken0, address _swapPairToken1) private {
        require(
            DexLibrary.checkSwapPairCompatibility(IPair(_swapPairWAVAXJoe), address(WAVAX), address(poolRewardToken)),
            "_swapPairWAVAXJoe is not a WAVAX-Joe pair"
        );
        require(
            _swapPairToken0 == address(0)
            || DexLibrary.checkSwapPairCompatibility(IPair(_swapPairToken0), address(WAVAX), IPair(address(depositToken)).token0()),
            "_swapPairToken0 is not a WAVAX+deposit token0"
        );
        require(
            _swapPairToken1 == address(0)
            || DexLibrary.checkSwapPairCompatibility(IPair(_swapPairToken1), address(WAVAX), IPair(address(depositToken)).token1()),
            "_swapPairToken0 is not a WAVAX+deposit token1"
        );
        ( ,address extraRewardToken, , ) = stakingContract.pendingTokens(PID, address(this));
        require(
            _extraTokenSwapPair == address(0)
            || DexLibrary.checkSwapPairCompatibility(IPair(_extraTokenSwapPair), address(WAVAX), extraRewardToken),
            "_swapPairWAVAXJoe is not a WAVAX-extra reward pair, check stakingContract.pendingTokens"
        );
        // converts Joe to WAVAX
        swapPairWAVAXJoe = IPair(_swapPairWAVAXJoe);
        // converts extra reward to WAVAX
        swapPairExtraToken = IPair(_extraTokenSwapPair);
        // converts WAVAX to pair token0
        swapPairToken0 = IPair(_swapPairToken0);
        // converts WAVAX to pair token1
        swapPairToken1 = IPair(_swapPairToken1);
    }

    function setAllowances() public override onlyOwner {
        depositToken.approve(address(stakingContract), MAX_UINT);
    }

    function deposit(uint amount) external override {
        _deposit(msg.sender, amount);
    }

    function depositWithPermit(uint amount, uint deadline, uint8 v, bytes32 r, bytes32 s) external override {
        depositToken.permit(msg.sender, address(this), amount, deadline, v, r, s);
        _deposit(msg.sender, amount);
    }

    function depositFor(address account, uint amount) external override {
        _deposit(account, amount);
    }

    function _deposit(address account, uint amount) private onlyAllowedDeposits {
        require(DEPOSITS_ENABLED == true, "JoeStrategyV3::_deposit");
        if (MAX_TOKENS_TO_DEPOSIT_WITHOUT_REINVEST > 0) {
            uint unclaimedRewards = checkReward();
            if (unclaimedRewards > MAX_TOKENS_TO_DEPOSIT_WITHOUT_REINVEST) {
                (uint poolTokenAmount, address extraRewardTokenAddress, uint extraRewardTokenAmount, uint rewardTokenAmount) = _checkReward();
                _reinvest(poolTokenAmount, extraRewardTokenAddress, extraRewardTokenAmount, rewardTokenAmount);
            }
        }
        require(depositToken.transferFrom(msg.sender, address(this), amount));
        _stakeDepositTokens(amount);
        _mint(account, getSharesForDepositTokens(amount));
        totalDeposits = totalDeposits.add(amount);
        emit Deposit(account, amount);
    }

    function withdraw(uint amount) external override {
        uint depositTokenAmount = getDepositTokensForShares(amount);
        if (depositTokenAmount > 0) {
            _withdrawDepositTokens(depositTokenAmount);
            _safeTransfer(address(depositToken), msg.sender, depositTokenAmount);
            _burn(msg.sender, amount);
            totalDeposits = totalDeposits.sub(depositTokenAmount);
            emit Withdraw(msg.sender, depositTokenAmount);
        }
    }

    function _withdrawDepositTokens(uint amount) private {
        require(amount > 0, "JoeStrategyV3::_withdrawDepositTokens");
        stakingContract.withdraw(PID, amount);
    }

    function reinvest() external override onlyEOA {
        uint unclaimedRewards = checkReward();
        require(unclaimedRewards >= MIN_TOKENS_TO_REINVEST, "JoeStrategyV3::reinvest");
        (uint poolTokenAmount, address extraRewardTokenAddress, uint extraRewardTokenAmount, uint rewardTokenAmount) = _checkReward();
        _reinvest(poolTokenAmount, extraRewardTokenAddress, extraRewardTokenAmount, rewardTokenAmount);
    }

    function _convertRewardIntoWAVAX(uint pendingJoe, address extraRewardToken, uint pendingExtraReward) private returns (uint) {
        uint convertedAmountWAVAX = 0;

        if (extraRewardToken == address(poolRewardToken)) {
            convertedAmountWAVAX = DexLibrary.swap(
                pendingExtraReward.add(pendingJoe),
                address(poolRewardToken), address(WAVAX),
                swapPairWAVAXJoe
            );
            return convertedAmountWAVAX;
        }

        convertedAmountWAVAX = DexLibrary.swap(
            pendingJoe,
            address(poolRewardToken), address(WAVAX),
            swapPairWAVAXJoe
        );
        if (
            address(swapPairExtraToken) != address(0)
            && pendingExtraReward > 0
            && DexLibrary.checkSwapPairCompatibility(swapPairExtraToken, extraRewardToken, address(WAVAX))
        ) {
            convertedAmountWAVAX = convertedAmountWAVAX.add(
                DexLibrary.swap(pendingExtraReward, extraRewardToken, address(WAVAX), swapPairExtraToken)
            );
        }
        return convertedAmountWAVAX;
    }

    /**
     * @notice Reinvest rewards from staking contract to deposit tokens
     * @dev Reverts if the expected amount of tokens are not returned from `stakingContract`
     */
    function _reinvest(uint _pendingJoe, address _extraRewardToken, uint _pendingExtraToken, uint _pendingWavax) private {
        stakingContract.deposit(PID, 0);
        uint amount = _pendingWavax.add(
            _convertRewardIntoWAVAX(_pendingJoe, _extraRewardToken, _pendingExtraToken)
        );

        uint devFee = amount.mul(DEV_FEE_BIPS).div(BIPS_DIVISOR);
        if (devFee > 0) {
            _safeTransfer(address(WAVAX), devAddr, devFee);
        }

        uint adminFee = amount.mul(ADMIN_FEE_BIPS).div(BIPS_DIVISOR);
        if (adminFee > 0) {
            _safeTransfer(address(WAVAX), owner(), adminFee);
        }

        uint reinvestFee = amount.mul(REINVEST_REWARD_BIPS).div(BIPS_DIVISOR);
        if (reinvestFee > 0) {
            _safeTransfer(address(WAVAX), msg.sender, reinvestFee);
        }

        uint depositTokenAmount = DexLibrary.convertRewardTokensToDepositTokens(
            amount.sub(devFee).sub(adminFee).sub(reinvestFee),
            address(WAVAX),
            address(depositToken),
            swapPairToken0,
            swapPairToken1
        );

        _stakeDepositTokens(depositTokenAmount);
        totalDeposits = totalDeposits.add(depositTokenAmount);

        emit Reinvest(totalDeposits, totalSupply);
    }

    function _stakeDepositTokens(uint amount) private {
        require(amount > 0, "JoeStrategyV3::_stakeDepositTokens");
        stakingContract.deposit(PID, amount);
    }

    /**
     * @notice Safely transfer using an anonymosu ERC20 token
     * @dev Requires token to return true on transfer
     * @param token address
     * @param to recipient address
     * @param value amount
     */
    function _safeTransfer(address token, address to, uint256 value) private {
        require(IERC20(token).transfer(to, value), 'TransferHelper: TRANSFER_FROM_FAILED');
    }

    function setExtraRewardSwapPair(address swapPair) external onlyDev {
        if (swapPair == address(0)) {
            swapPairExtraToken = IPair(address(0));
            return;
        }

        ( ,address extraRewardToken, , ) = stakingContract.pendingTokens(PID, address(this));
        require(
            DexLibrary.checkSwapPairCompatibility(IPair(swapPair), address(WAVAX), extraRewardToken),
            "_swapPairWAVAXJoe is not a WAVAX-extra reward pair, check stakingContract.pendingTokens"
        );
        swapPairExtraToken = IPair(swapPair);
    }

    function _checkReward() private view returns (uint poolTokenAmount, address extraRewardTokenAddress, uint extraRewardTokenAmount, uint rewardTokenAmount) {
        (uint pendingJoe, address extraRewardToken, , uint pendingExtraToken) = stakingContract.pendingTokens(PID, address(this));
        uint poolRewardBalance = poolRewardToken.balanceOf(address(this));
        uint extraRewardTokenBalance;
        if (extraRewardToken != address(0)) {
            extraRewardTokenBalance = IERC20(extraRewardToken).balanceOf(address(this));
        }
        uint rewardTokenBalance = rewardToken.balanceOf(address(this));
        return (
            poolRewardBalance.add(pendingJoe),
            extraRewardToken,
            extraRewardTokenBalance.add(pendingExtraToken),
            rewardTokenBalance
        );
    }

    function checkReward() public override view returns (uint) {
        (uint poolTokenAmount, address extraRewardTokenAddress, uint extraRewardTokenAmount, uint rewardTokenAmount) = _checkReward();
        uint estimatedWAVAX = DexLibrary.estimateConversionThroughPair(
            poolTokenAmount,
            address(poolRewardToken), address(WAVAX),
            swapPairWAVAXJoe
        );
        if (
            address(swapPairExtraToken) != address(0)
            && extraRewardTokenAmount > 0
            && DexLibrary.checkSwapPairCompatibility(swapPairExtraToken, extraRewardTokenAddress, address(WAVAX))
        ) {
            estimatedWAVAX.add(
                DexLibrary.estimateConversionThroughPair(
                    extraRewardTokenAmount,
                    extraRewardTokenAddress, address(WAVAX),
                    swapPairExtraToken
                )
            );
        }
        return rewardTokenAmount.add(estimatedWAVAX);
    }

    function estimateDeployedBalance() external override view returns (uint) {
        (uint amount, ) = stakingContract.userInfo(PID, address(this));
        return amount;
    }

    /**
    * @notice Allows exit from Staking Contract without additional logic
    * @dev Reward tokens are not automatically collected
    * @dev New deposits will be effectively disabled
    */
    function emergencyWithdraw() external onlyOwner {
        stakingContract.emergencyWithdraw(PID);
        totalDeposits = 0;
    }

    function rescueDeployedFunds(uint minReturnAmountAccepted, bool disableDeposits) external override onlyOwner {
        uint balanceBefore = depositToken.balanceOf(address(this));
        stakingContract.emergencyWithdraw(PID);
        uint balanceAfter = depositToken.balanceOf(address(this));
        require(balanceAfter.sub(balanceBefore) >= minReturnAmountAccepted, "JoeStrategyV3::rescueDeployedFunds");
        totalDeposits = balanceAfter;
        emit Reinvest(totalDeposits, totalSupply);
        if (DEPOSITS_ENABLED == true && disableDeposits == true) {
            updateDepositsEnabled(false);
        }
    }
}

File 2 of 12 : YakStrategy.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

import "./lib/SafeMath.sol";
import "./lib/Ownable.sol";
import "./lib/Permissioned.sol";
import "./interfaces/IERC20.sol";
import "./YakERC20.sol";

/**
 * @notice YakStrategy should be inherited by new strategies
 */
abstract contract YakStrategy is YakERC20, Ownable, Permissioned {
    using SafeMath for uint;

    uint public totalDeposits;

    IERC20 public depositToken;
    IERC20 public rewardToken;
    address public devAddr;

    uint public MIN_TOKENS_TO_REINVEST;
    uint public MAX_TOKENS_TO_DEPOSIT_WITHOUT_REINVEST;
    bool public DEPOSITS_ENABLED;

    uint public REINVEST_REWARD_BIPS;
    uint public ADMIN_FEE_BIPS;
    uint public DEV_FEE_BIPS;

    uint constant internal BIPS_DIVISOR = 10000;
    uint constant internal MAX_UINT = uint(-1);

    event Deposit(address indexed account, uint amount);
    event Withdraw(address indexed account, uint amount);
    event Reinvest(uint newTotalDeposits, uint newTotalSupply);
    event Recovered(address token, uint amount);
    event UpdateAdminFee(uint oldValue, uint newValue);
    event UpdateDevFee(uint oldValue, uint newValue);
    event UpdateReinvestReward(uint oldValue, uint newValue);
    event UpdateMinTokensToReinvest(uint oldValue, uint newValue);
    event UpdateMaxTokensToDepositWithoutReinvest(uint oldValue, uint newValue);
    event UpdateDevAddr(address oldValue, address newValue);
    event DepositsEnabled(bool newValue);

    /**
     * @notice Throws if called by smart contract
     */
    modifier onlyEOA() {
        require(tx.origin == msg.sender, "YakStrategy::onlyEOA");
        _;
    }

    /**
     * @notice Only called by dev
     */
    modifier onlyDev() {
        require(msg.sender == devAddr, "YakStrategy::onlyDev");
        _;
    }

    /**
     * @notice Approve tokens for use in Strategy
     * @dev Should use modifier `onlyOwner` to avoid griefing
     */
    function setAllowances() public virtual;

    /**
     * @notice Revoke token allowance
     * @param token address
     * @param spender address
     */
    function revokeAllowance(address token, address spender) external onlyOwner {
        require(IERC20(token).approve(spender, 0));
    }

    /**
     * @notice Deposit and deploy deposits tokens to the strategy
     * @dev Must mint receipt tokens to `msg.sender`
     * @param amount deposit tokens
     */
    function deposit(uint amount) external virtual;

    /**
    * @notice Deposit using Permit
    * @dev Should revert for tokens without Permit
    * @param amount Amount of tokens to deposit
    * @param deadline The time at which to expire the signature
    * @param v The recovery byte of the signature
    * @param r Half of the ECDSA signature pair
    * @param s Half of the ECDSA signature pair
    */
    function depositWithPermit(uint amount, uint deadline, uint8 v, bytes32 r, bytes32 s) external virtual;

    /**
     * @notice Deposit on behalf of another account
     * @dev Must mint receipt tokens to `account`
     * @param account address to receive receipt tokens
     * @param amount deposit tokens
     */
    function depositFor(address account, uint amount) external virtual;

    /**
     * @notice Redeem receipt tokens for deposit tokens
     * @param amount receipt tokens
     */
    function withdraw(uint amount) external virtual;

    /**
     * @notice Reinvest reward tokens into deposit tokens
     */
    function reinvest() external virtual;

    /**
     * @notice Estimate reinvest reward
     * @return reward tokens
     */
    function estimateReinvestReward() external view returns (uint) {
        uint unclaimedRewards = checkReward();
        if (unclaimedRewards >= MIN_TOKENS_TO_REINVEST) {
            return unclaimedRewards.mul(REINVEST_REWARD_BIPS).div(BIPS_DIVISOR);
        }
        return 0;
    }

    /**
     * @notice Reward tokens avialable to strategy, including balance
     * @return reward tokens
     */
    function checkReward() public virtual view returns (uint);

    /**
     * @notice Estimated deposit token balance deployed by strategy, excluding balance
     * @return deposit tokens
     */
    function estimateDeployedBalance() external virtual view returns (uint);

    /**
     * @notice Rescue all available deployed deposit tokens back to Strategy
     * @param minReturnAmountAccepted min deposit tokens to receive
     * @param disableDeposits bool
     */
    function rescueDeployedFunds(uint minReturnAmountAccepted, bool disableDeposits) external virtual;

    /**
     * @notice Calculate receipt tokens for a given amount of deposit tokens
     * @dev If contract is empty, use 1:1 ratio
     * @dev Could return zero shares for very low amounts of deposit tokens
     * @param amount deposit tokens
     * @return receipt tokens
     */
    function getSharesForDepositTokens(uint amount) public view returns (uint) {
        if (totalSupply.mul(totalDeposits) == 0) {
            return amount;
        }
        return amount.mul(totalSupply).div(totalDeposits);
    }

    /**
     * @notice Calculate deposit tokens for a given amount of receipt tokens
     * @param amount receipt tokens
     * @return deposit tokens
     */
    function getDepositTokensForShares(uint amount) public view returns (uint) {
        if (totalSupply.mul(totalDeposits) == 0) {
            return 0;
        }
        return amount.mul(totalDeposits).div(totalSupply);
    }

    /**
     * @notice Update reinvest min threshold
     * @param newValue threshold
     */
    function updateMinTokensToReinvest(uint newValue) public onlyOwner {
        emit UpdateMinTokensToReinvest(MIN_TOKENS_TO_REINVEST, newValue);
        MIN_TOKENS_TO_REINVEST = newValue;
    }

    /**
     * @notice Update reinvest max threshold before a deposit
     * @param newValue threshold
     */
    function updateMaxTokensToDepositWithoutReinvest(uint newValue) public onlyOwner {
        emit UpdateMaxTokensToDepositWithoutReinvest(MAX_TOKENS_TO_DEPOSIT_WITHOUT_REINVEST, newValue);
        MAX_TOKENS_TO_DEPOSIT_WITHOUT_REINVEST = newValue;
    }

    /**
     * @notice Update developer fee
     * @param newValue fee in BIPS
     */
    function updateDevFee(uint newValue) public onlyOwner {
        require(newValue.add(ADMIN_FEE_BIPS).add(REINVEST_REWARD_BIPS) <= BIPS_DIVISOR);
        emit UpdateDevFee(DEV_FEE_BIPS, newValue);
        DEV_FEE_BIPS = newValue;
    }

    /**
     * @notice Update admin fee
     * @param newValue fee in BIPS
     */
    function updateAdminFee(uint newValue) public onlyOwner {
        require(newValue.add(DEV_FEE_BIPS).add(REINVEST_REWARD_BIPS) <= BIPS_DIVISOR);
        emit UpdateAdminFee(ADMIN_FEE_BIPS, newValue);
        ADMIN_FEE_BIPS = newValue;
    }

    /**
     * @notice Update reinvest reward
     * @param newValue fee in BIPS
     */
    function updateReinvestReward(uint newValue) public onlyOwner {
        require(newValue.add(ADMIN_FEE_BIPS).add(DEV_FEE_BIPS) <= BIPS_DIVISOR);
        emit UpdateReinvestReward(REINVEST_REWARD_BIPS, newValue);
        REINVEST_REWARD_BIPS = newValue;
    }

    /**
     * @notice Enable/disable deposits
     * @param newValue bool
     */
    function updateDepositsEnabled(bool newValue) public onlyOwner {
        require(DEPOSITS_ENABLED != newValue);
        DEPOSITS_ENABLED = newValue;
        emit DepositsEnabled(newValue);
    }

    /**
     * @notice Update devAddr
     * @param newValue address
     */
    function updateDevAddr(address newValue) public onlyDev {
        emit UpdateDevAddr(devAddr, newValue);
        devAddr = newValue;
    }

    /**
     * @notice Recover ERC20 from contract
     * @param tokenAddress token address
     * @param tokenAmount amount to recover
     */
    function recoverERC20(address tokenAddress, uint tokenAmount) external onlyOwner {
        require(tokenAmount > 0);
        require(IERC20(tokenAddress).transfer(msg.sender, tokenAmount));
        emit Recovered(tokenAddress, tokenAmount);
    }

    /**
     * @notice Recover AVAX from contract
     * @param amount amount
     */
    function recoverAVAX(uint amount) external onlyOwner {
        require(amount > 0);
        msg.sender.transfer(amount);
        emit Recovered(address(0), amount);
    }
}

File 3 of 12 : IJoeChef.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

interface IJoeChef {
    function deposit(uint256 _pid, uint256 _amount) external;

    function withdraw(uint256 _pid, uint256 _amount) external;

    function emergencyWithdraw(uint256 _pid) external;

    function pendingTokens(uint256 _pid, address _user)
        external
        view
        returns (
            uint256 pendingJoe,
            address bonusTokenAddress,
            string memory bonusTokenSymbol,
            uint256 pendingBonusToken
        );

    function userInfo(uint256 pid, address user)
        external
        view
        returns (uint256 amount, uint256 rewardDebt);

    function poolInfo(uint256 pid)
        external
        view
        returns (
            address lpToken,
            uint256 accJoePerShare,
            uint256 lastRewardTimestamp,
            uint256 allocPoint,
            address rewarder
        );
}

File 4 of 12 : IPair.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

import "./IERC20.sol";

interface IPair is IERC20 {
    function token0() external pure returns (address);
    function token1() external pure returns (address);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function mint(address to) external returns (uint liquidity);
    function sync() external;
}

File 5 of 12 : IWAVAX.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

interface IWAVAX {
    function deposit() external payable;
    function transfer(address to, uint value) external returns (bool);
    function balanceOf(address owner) external view returns (uint); 
    function withdraw(uint) external;
    function approve(address to, uint value) external returns (bool);
}

File 6 of 12 : IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

interface IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

File 7 of 12 : DexLibrary.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

import "./SafeMath.sol";
import "../interfaces/IPair.sol";
import "../interfaces/IWAVAX.sol";

library DexLibrary {
    using SafeMath for uint;
    bytes private constant zeroBytes = new bytes(0);
    IWAVAX private constant WAVAX = IWAVAX(0xB31f66AA3C1e785363F0875A1B74E27b85FD66c7);

    /**
     * @notice Swap directly through a Pair
     * @param amountIn input amount
     * @param fromToken address
     * @param toToken address
     * @param pair Pair used for swap
     * @return output amount
     */
    function swap(uint amountIn, address fromToken, address toToken, IPair pair) internal returns (uint) {
        (address token0,) = sortTokens(fromToken, toToken);
        (uint112 reserve0, uint112 reserve1,) = pair.getReserves();
        if (token0 != fromToken) (reserve0, reserve1) = (reserve1, reserve0);
        uint amountOut1 = 0;
        uint amountOut2 = getAmountOut(amountIn, reserve0, reserve1);
        if (token0 != fromToken) (amountOut1, amountOut2) = (amountOut2, amountOut1);
        safeTransfer(fromToken, address(pair), amountIn);
        pair.swap(amountOut1, amountOut2, address(this), zeroBytes);
        return amountOut2 > amountOut1 ? amountOut2 : amountOut1;
    }

    function checkSwapPairCompatibility(IPair pair, address tokenA, address tokenB) internal pure returns (bool) {
        return (tokenA == pair.token0() || tokenA == pair.token1()) && (tokenB == pair.token0() || tokenB == pair.token1()) && tokenA != tokenB;
    }

    function estimateConversionThroughPair(uint amountIn, address fromToken, address toToken, IPair swapPair) internal view returns (uint) {
        (address token0,) = sortTokens(fromToken, toToken);
        (uint112 reserve0, uint112 reserve1,) = swapPair.getReserves();
        if (token0 != fromToken) (reserve0, reserve1) = (reserve1, reserve0);
        return getAmountOut(amountIn, reserve0, reserve1);
    }

    /**
     * @notice Converts reward tokens to deposit tokens
     * @dev No price checks enforced
     * @param amount reward tokens
     * @return deposit tokens
     */
    function convertRewardTokensToDepositTokens(uint amount, address rewardToken, address depositToken, IPair swapPairToken0, IPair swapPairToken1) internal returns (uint) {
        uint amountIn = amount.div(2);
        require(amountIn > 0, "DexLibrary::_convertRewardTokensToDepositTokens");

        address token0 = IPair(depositToken).token0();
        uint amountOutToken0 = amountIn;
        if (rewardToken != token0) {
            amountOutToken0 = DexLibrary.swap(amountIn, rewardToken, token0, swapPairToken0);
        }

        address token1 = IPair(depositToken).token1();
        uint amountOutToken1 = amountIn;
        if (rewardToken != token1) {
            amountOutToken1 = DexLibrary.swap(amountIn, rewardToken, token1, swapPairToken1);
        }

        return DexLibrary.addLiquidity(depositToken, amountOutToken0, amountOutToken1);
    }

    /**
     * @notice Add liquidity directly through a Pair
     * @dev Checks adding the max of each token amount
     * @param depositToken address
     * @param maxAmountIn0 amount token0
     * @param maxAmountIn1 amount token1
     * @return liquidity tokens
     */
    function addLiquidity(address depositToken, uint maxAmountIn0, uint maxAmountIn1) internal returns (uint) {
        (uint112 reserve0, uint112 reserve1,) = IPair(address(depositToken)).getReserves();
        uint amountIn1 = _quoteLiquidityAmountOut(maxAmountIn0, reserve0, reserve1);
        if (amountIn1 > maxAmountIn1) {
            amountIn1 = maxAmountIn1;
            maxAmountIn0 = _quoteLiquidityAmountOut(maxAmountIn1, reserve1, reserve0);
        }

        safeTransfer(IPair(depositToken).token0(), depositToken, maxAmountIn0);
        safeTransfer(IPair(depositToken).token1(), depositToken, amountIn1);
        return IPair(depositToken).mint(address(this));
    }

    /**
     * @notice Quote liquidity amount out
     * @param amountIn input tokens
     * @param reserve0 size of input asset reserve
     * @param reserve1 size of output asset reserve
     * @return liquidity tokens
     */
    function _quoteLiquidityAmountOut(uint amountIn, uint reserve0, uint reserve1) private pure returns (uint) {
        return amountIn.mul(reserve1).div(reserve0);
    }

    /**
     * @notice Given two tokens, it'll return the tokens in the right order for the tokens pair
     * @dev TokenA must be different from TokenB, and both shouldn't be address(0), no validations
     * @param tokenA address
     * @param tokenB address
     * @return sorted tokens
     */
    function sortTokens(address tokenA, address tokenB) internal pure returns (address, address) {
        return tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
    }

    /**
     * @notice Given an input amount of an asset and pair reserves, returns maximum output amount of the other asset
     * @dev Assumes swap fee is 0.30%
     * @param amountIn input asset
     * @param reserveIn size of input asset reserve
     * @param reserveOut size of output asset reserve
     * @return maximum output amount
     */
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint) {
        uint amountInWithFee = amountIn.mul(997);
        uint numerator = amountInWithFee.mul(reserveOut);
        uint denominator = reserveIn.mul(1000).add(amountInWithFee);
        return numerator.div(denominator);
    }

    /**
     * @notice Safely transfer using an anonymous ERC20 token
     * @dev Requires token to return true on transfer
     * @param token address
     * @param to recipient address
     * @param value amount
     */
    function safeTransfer(address token, address to, uint256 value) internal {
        require(IERC20(token).transfer(to, value), "DexLibrary::TRANSFER_FROM_FAILED");
    }
}

File 8 of 12 : SafeMath.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

// From https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/Math.sol
// Subject to the MIT license.

/**
 * @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 addition of two unsigned integers, reverting with custom message on overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, errorMessage);

        return c;
    }

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

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on underflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot underflow.
     */
    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 multiplication of two unsigned integers, reverting on overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b, string memory errorMessage) 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, errorMessage);

        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) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

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

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

File 9 of 12 : Ownable.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

import "./Context.sol";

/**
 * @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.
 */
abstract 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 () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual 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;
    }
}

File 10 of 12 : Permissioned.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

import "./Ownable.sol";
import "./SafeMath.sol";

abstract contract Permissioned is Ownable {
    using SafeMath for uint;

    uint public numberOfAllowedDepositors;
    mapping(address => bool) public allowedDepositors;

    event AllowDepositor(address indexed account);
    event RemoveDepositor(address indexed account);

    modifier onlyAllowedDeposits() {
        if (numberOfAllowedDepositors > 0) {
            require(allowedDepositors[msg.sender] == true, "Permissioned::onlyAllowedDeposits, not allowed");
        }
        _;
    }

    /**
     * @notice Add an allowed depositor
     * @param depositor address
     */
    function allowDepositor(address depositor) external onlyOwner {
        require(allowedDepositors[depositor] == false, "Permissioned::allowDepositor");
        allowedDepositors[depositor] = true;
        numberOfAllowedDepositors = numberOfAllowedDepositors.add(1);
        emit AllowDepositor(depositor);
    }

    /**
     * @notice Remove an allowed depositor
     * @param depositor address
     */
    function removeDepositor(address depositor) external onlyOwner {
        require(numberOfAllowedDepositors > 0, "Permissioned::removeDepositor, no allowed depositors");
        require(allowedDepositors[depositor] == true, "Permissioned::removeDepositor, not allowed");
        allowedDepositors[depositor] = false;
        numberOfAllowedDepositors = numberOfAllowedDepositors.sub(1);
        emit RemoveDepositor(depositor);
    }
}

File 11 of 12 : YakERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
pragma experimental ABIEncoderV2;

import "./lib/SafeMath.sol";
import "./interfaces/IERC20.sol";

abstract contract YakERC20 {
    using SafeMath for uint256;

    string public name = "Yield Yak";
    string public symbol = "YRT";
    uint8 public constant decimals = 18;
    uint256 public totalSupply;
  
    mapping (address => mapping (address => uint256)) internal allowances;
    mapping (address => uint256) internal balances;

    /// @dev keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)")
    bytes32 public constant DOMAIN_TYPEHASH = 0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f;

    /// @dev keccak256("1");
    bytes32 public constant VERSION_HASH = 0xc89efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bc6;

    /// @dev keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;

    mapping(address => uint) public nonces;

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    constructor() {}

    /**
     * @notice Get the number of tokens `spender` is approved to spend on behalf of `account`
     * @param account The address of the account holding the funds
     * @param spender The address of the account spending the funds
     * @return The number of tokens approved
     */
    function allowance(address account, address spender) external view returns (uint) {
        return allowances[account][spender];
    }

    /**
     * @notice Approve `spender` to transfer up to `amount` from `src`
     * @dev This will overwrite the approval amount for `spender`
     * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve)
     * It is recommended to use increaseAllowance and decreaseAllowance instead
     * @param spender The address of the account which may transfer tokens
     * @param amount The number of tokens that are approved (2^256-1 means infinite)
     * @return Whether or not the approval succeeded
     */
    function approve(address spender, uint256 amount) external returns (bool) {
        _approve(msg.sender, spender, amount);
        return true;
    }

    /**
     * @notice Get the number of tokens held by the `account`
     * @param account The address of the account to get the balance of
     * @return The number of tokens held
     */
    function balanceOf(address account) external view returns (uint) {
        return balances[account];
    }

    /**
     * @notice Transfer `amount` tokens from `msg.sender` to `dst`
     * @param dst The address of the destination account
     * @param amount The number of tokens to transfer
     * @return Whether or not the transfer succeeded
     */
    function transfer(address dst, uint256 amount) external returns (bool) {
        _transferTokens(msg.sender, dst, amount);
        return true;
    }

    /**
     * @notice Transfer `amount` tokens from `src` to `dst`
     * @param src The address of the source account
     * @param dst The address of the destination account
     * @param amount The number of tokens to transfer
     * @return Whether or not the transfer succeeded
     */
    function transferFrom(address src, address dst, uint256 amount) external returns (bool) {
        address spender = msg.sender;
        uint256 spenderAllowance = allowances[src][spender];

        if (spender != src && spenderAllowance != uint256(-1)) {
            uint256 newAllowance = spenderAllowance.sub(amount, "transferFrom: transfer amount exceeds allowance");
            allowances[src][spender] = newAllowance;

            emit Approval(src, spender, newAllowance);
        }

        _transferTokens(src, dst, amount);
        return true;
    }


    /**
     * @notice Approval implementation
     * @param owner The address of the account which owns tokens
     * @param spender The address of the account which may transfer tokens
     * @param amount The number of tokens that are approved (2^256-1 means infinite)
     */
    function _approve(address owner, address spender, uint256 amount) internal {
        require(owner != address(0), "_approve::owner zero address");
        require(spender != address(0), "_approve::spender zero address");
        allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @notice Transfer implementation
     * @param from The address of the account which owns tokens
     * @param to The address of the account which is receiving tokens
     * @param value The number of tokens that are being transferred
     */
    function _transferTokens(address from, address to, uint256 value) internal {
        require(to != address(0), "_transferTokens: cannot transfer to the zero address");

        balances[from] = balances[from].sub(value, "_transferTokens: transfer exceeds from balance");
        balances[to] = balances[to].add(value);
        emit Transfer(from, to, value);
    }

    function _mint(address to, uint256 value) internal {
        totalSupply = totalSupply.add(value);
        balances[to] = balances[to].add(value);
        emit Transfer(address(0), to, value);
    }

    function _burn(address from, uint256 value) internal {
        balances[from] = balances[from].sub(value, "_burn: burn amount exceeds from balance");
        totalSupply = totalSupply.sub(value, "_burn: burn amount exceeds total supply");
        emit Transfer(from, address(0), value);
    }

    /**
     * @notice Triggers an approval from owner to spender
     * @param owner The address to approve from
     * @param spender The address to be approved
     * @param value The number of tokens that are approved (2^256-1 means infinite)
     * @param deadline The time at which to expire the signature
     * @param v The recovery byte of the signature
     * @param r Half of the ECDSA signature pair
     * @param s Half of the ECDSA signature pair
     */
    function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external {
        require(deadline >= block.timestamp, "permit::expired");

        bytes32 encodeData = keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline));
        _validateSignedData(owner, encodeData, v, r, s);

        _approve(owner, spender, value);
    }

    /**
     * @notice Recovers address from signed data and validates the signature
     * @param signer Address that signed the data
     * @param encodeData Data signed by the address
     * @param v The recovery byte of the signature
     * @param r Half of the ECDSA signature pair
     * @param s Half of the ECDSA signature pair
     */
    function _validateSignedData(address signer, bytes32 encodeData, uint8 v, bytes32 r, bytes32 s) internal view {
        bytes32 digest = keccak256(
            abi.encodePacked(
                "\x19\x01",
                getDomainSeparator(),
                encodeData
            )
        );
        address recoveredAddress = ecrecover(digest, v, r, s);
        // Explicitly disallow authorizations for address(0) as ecrecover returns address(0) on malformed messages
        require(recoveredAddress != address(0) && recoveredAddress == signer, "Arch::validateSig: invalid signature");
    }

    /**
     * @notice EIP-712 Domain separator
     * @return Separator
     */
    function getDomainSeparator() public view returns (bytes32) {
        return keccak256(
            abi.encode(
                DOMAIN_TYPEHASH,
                keccak256(bytes(name)),
                VERSION_HASH,
                _getChainId(),
                address(this)
            )
        );
    }

    /**
     * @notice Current id of the chain where this contract is deployed
     * @return Chain id
     */
    function _getChainId() internal pure returns (uint) {
        uint256 chainId;
        assembly { chainId := chainid() }
        return chainId;
    }
}

File 12 of 12 : Context.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

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

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 999
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

Contract ABI

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