Contract 0x287F9681af590354d6722ac51e6935BEef631941 12

 

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0 ETH

EtherValue:
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0x840d7ed42f35489abf620f6776036a0c6778f244ff3e16bac3b2a2f68ba7e6f1Reinvest1165683912024-02-24 0:45:593 days 11 hrs ago0xa62fb05af6c35d9af70015c7f33ee558a9060036 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000343716580.002344595
0x9276ef50888a54fb009d24649275c9d3c79400227bd62a7e747d7a9fd34a8368Reinvest1161887712024-02-15 5:51:5912 days 6 hrs ago0xa62fb05af6c35d9af70015c7f33ee558a9060036 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000257810970.002780773
0x05b80603b6fd4abdb464daa531622c8e764831df425bc5467018d959b5b4edc4Reinvest1158869412024-02-08 6:10:5919 days 6 hrs ago0x0f52a397d888db5e0d3593e32404ab92165c6418 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000539053070.01
0xd92898d54239d95620ed02f11b29feb11f4bd4b1cc116b3a915d35691d66c4e4Reinvest1156946182024-02-03 19:20:1323 days 17 hrs ago0x82b16fbdb9e1aa666b007a9df40d2dcefbaea791 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000253928170.006683659
0xfda712c7516a64cb6542ebeb17f77f460722d09e44ee579a21ad322eb1271fbfReinvest1155078302024-01-30 11:33:5728 days 1 hr ago0x82b16fbdb9e1aa666b007a9df40d2dcefbaea791 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000501569250.005849246
0xb35410c4a66ecb8e8ef269bc530770023e61107b1500481e17cdf3e58aacc3ddReinvest1154552442024-01-29 6:21:0529 days 6 hrs ago0x02a203ebef940e0f58485d30942b6b6acb0057a2 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000114527860.003973052
0xf578c688b3d98745a22808a1e97a94dc3d324094ce870be82cea61a03704b1dbReinvest1152414422024-01-24 7:34:2134 days 5 hrs ago0xabe69aa27bffbdbf006d3918b68430c78895be53 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000169235880.004210551
0xd087a8e505fc60cd183784f36c28d48c1ecffdd310ce8dedbbc130ddd21bebb4Reinvest1151374242024-01-21 21:47:0536 days 14 hrs ago0xa62fb05af6c35d9af70015c7f33ee558a9060036 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000188840110.00249466
0xa7ba4684f9d360c8132a06420b0d1f6ec5a955096f30c1056f601a3f1a5aabedReinvest1149291812024-01-17 2:05:3941 days 10 hrs ago0xf6f9a925129810c4789de1ddf3b210cb3210399c IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.000119013910.101829835
0xe0df904e3225a90857c404da39ea8cb11bc926a2af7e4862b072281355ef77b8Reinvest1147111822024-01-12 0:59:0146 days 11 hrs ago0x02a203ebef940e0f58485d30942b6b6acb0057a2 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000227437650.002652101
0xd9192b3b9782db438142fa3b1dd6fba6ad4254add120b960e718986706cd5a5cReinvest1144480502024-01-05 22:47:5752 days 13 hrs ago0xa62fb05af6c35d9af70015c7f33ee558a9060036 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000242511140.005523609
0xb8755dd6a85e54b0c0c75720c33904a33947755c8be7ceb25ceeb08ed4b83d74Reinvest1142256322023-12-31 19:14:0157 days 17 hrs ago0x02a203ebef940e0f58485d30942b6b6acb0057a2 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000204087380.004294641
0xf29f8ded85447ce2686b501ca09937e1031701cd5e0816ce5107b9e0a87078c0Reinvest1140376262023-12-27 10:47:0962 days 1 hr ago0xeaf89fc36b9c5099076e5852bbbc19befb2cafd0 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000374478690.004807131
0x5e3d32158401208d98e5d3051dff5312439f504cfae8be0cb8ebcf6c95391af1Reinvest1139344002023-12-25 1:26:1764 days 11 hrs ago0x02a203ebef940e0f58485d30942b6b6acb0057a2 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000239950960.004780073
0x3997e92b1026045106406407dc35a17df56bbd3bb1f9d20eddfa28194ff04d8fReinvest1137179222023-12-20 1:10:2169 days 11 hrs ago0x3d6991085ab1ae3926cb96f25684c40a364b6856 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000520159240.005142726
0x027a5950b8dccf306d2825fe5540bc1190104aa6b6855b37832b1b6acb2503f1Reinvest1135027392023-12-15 1:37:3574 days 11 hrs ago0x02a203ebef940e0f58485d30942b6b6acb0057a2 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000434301430.007090304
0x4cf90c909cee6f9a070906966ddb884acc1d3ea48f8a4d1f33a9b29a18cdc7e9Reinvest1131223812023-12-06 6:18:5983 days 6 hrs ago0x3d6991085ab1ae3926cb96f25684c40a364b6856 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000736038230.008497274
0xb3ef889df837498f1c230a1314049117990137219a8b898d2eb2b2be418ddc79Reinvest1126956392023-11-26 9:14:1593 days 3 hrs ago0xa62fb05af6c35d9af70015c7f33ee558a9060036 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000343849040.005544162
0x901b80c3afbbc73e047355e235f74d56358ba2780ad9f9e14fb3b317c35228cfReinvest1124168022023-11-19 22:19:4199 days 14 hrs ago0x1e661423fc2a76017ece0ff91bc1ea72132b4af8 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000483156090.011543262
0x963090dc615654a092fcaccdd06e56803fa71f9926c2ac3d714e808f72c1ffa0Reinvest1124167912023-11-19 22:19:1999 days 14 hrs ago0x1e661423fc2a76017ece0ff91bc1ea72132b4af8 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000509742370.011023577
0xed8bfd92136120691388113e7e98f692c83066a5cea1fde73e7522b843a765f9Reinvest1123705212023-11-18 20:36:59100 days 16 hrs ago0xa62fb05af6c35d9af70015c7f33ee558a9060036 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000296438370.006750142
0x0ed6ee78c297684c91450e52780e6b6f92b28047c0eecb4f37c9ab2fb5462681Reinvest1121672862023-11-14 3:42:29105 days 8 hrs ago0x3d6991085ab1ae3926cb96f25684c40a364b6856 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000407115240.008669348
0x8be2ecbfcfb7ad549053c5c49176930b768c82ec555b159733d381724b3d5f2dReinvest1120401612023-11-11 5:04:59108 days 7 hrs ago0x02a203ebef940e0f58485d30942b6b6acb0057a2 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000376824550.008486972
0xbd8680a45ac4e143468685e18ac4f88bcc1167107e52f4e6ff68a2d51b4436c1Reinvest1117680552023-11-04 21:54:47114 days 14 hrs ago0x40c8dd5cf016ea7dc0b1d2571fbceb8eb6279f52 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000233167930.00888443
0x738afa5496acf819d1973e60728c0c1380d551878c9dac0211d00f14425a5ec9Reinvest1117680292023-11-04 21:53:55114 days 14 hrs ago0x40c8dd5cf016ea7dc0b1d2571fbceb8eb6279f52 IN  0x287f9681af590354d6722ac51e6935beef6319410 ETH0.0000255572880.009624524
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0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0x6b8edc43de878fd5cd5113c42747d32500db38730 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0x6b8edc43de878fd5cd5113c42747d32500db38730 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0xa132dab612db5cb9fc9ac426a0cc215a3423f9c90 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0x7f5c764cbc14f9669b88837ca1490cca17c316070 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 Velodrome Finance: VELO Token0 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0x7f5c764cbc14f9669b88837ca1490cca17c316070 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0xa132dab612db5cb9fc9ac426a0cc215a3423f9c90 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 Velodrome Finance: VELO Token0 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 Velodrome Finance: Pair Factory0 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0xe8537b6ff1039cb9ed0b71713f697ddbadbb717d0 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 Velodrome Finance: VELO Token0 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 Velodrome Finance: VELO Token0 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 Velodrome Finance: VELO Token0 ETH
0x4c40c3d3bd74a03b628f801dc030c8fab9e5b5b6d2780a1781bbd9d604fb19bf1075477192023-07-30 5:16:55212 days 7 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0x6b8edc43de878fd5cd5113c42747d32500db38730 ETH
0xebcf1b601b5f7a7132dac128f9d907aeb66e43a24d7436b02ca663758575af9e1075353822023-07-29 22:25:41212 days 14 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0x6b8edc43de878fd5cd5113c42747d32500db38730 ETH
0xebcf1b601b5f7a7132dac128f9d907aeb66e43a24d7436b02ca663758575af9e1075353822023-07-29 22:25:41212 days 14 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0x6b8edc43de878fd5cd5113c42747d32500db38730 ETH
0xebcf1b601b5f7a7132dac128f9d907aeb66e43a24d7436b02ca663758575af9e1075353822023-07-29 22:25:41212 days 14 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0xa132dab612db5cb9fc9ac426a0cc215a3423f9c90 ETH
0xebcf1b601b5f7a7132dac128f9d907aeb66e43a24d7436b02ca663758575af9e1075353822023-07-29 22:25:41212 days 14 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0x7f5c764cbc14f9669b88837ca1490cca17c316070 ETH
0xebcf1b601b5f7a7132dac128f9d907aeb66e43a24d7436b02ca663758575af9e1075353822023-07-29 22:25:41212 days 14 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 Velodrome Finance: VELO Token0 ETH
0xebcf1b601b5f7a7132dac128f9d907aeb66e43a24d7436b02ca663758575af9e1075353822023-07-29 22:25:41212 days 14 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0x7f5c764cbc14f9669b88837ca1490cca17c316070 ETH
0xebcf1b601b5f7a7132dac128f9d907aeb66e43a24d7436b02ca663758575af9e1075353822023-07-29 22:25:41212 days 14 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0xa132dab612db5cb9fc9ac426a0cc215a3423f9c90 ETH
0xebcf1b601b5f7a7132dac128f9d907aeb66e43a24d7436b02ca663758575af9e1075353822023-07-29 22:25:41212 days 14 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 Velodrome Finance: VELO Token0 ETH
0xebcf1b601b5f7a7132dac128f9d907aeb66e43a24d7436b02ca663758575af9e1075353822023-07-29 22:25:41212 days 14 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 Velodrome Finance: Pair Factory0 ETH
0xebcf1b601b5f7a7132dac128f9d907aeb66e43a24d7436b02ca663758575af9e1075353822023-07-29 22:25:41212 days 14 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 0xe8537b6ff1039cb9ed0b71713f697ddbadbb717d0 ETH
0xebcf1b601b5f7a7132dac128f9d907aeb66e43a24d7436b02ca663758575af9e1075353822023-07-29 22:25:41212 days 14 hrs ago 0x287f9681af590354d6722ac51e6935beef631941 Velodrome Finance: VELO Token0 ETH
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x2585D58367c9fACCDdECc7DF05006cF7F0F3D18e
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
VeloVaultToken

Compiler Version
v0.5.16+commit.9c3226ce

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 18 : VeloVaultToken.sol
pragma solidity =0.5.16;

import "@openzeppelin/contracts/ownership/Ownable.sol";
import "./PoolToken.sol";
import "./interfaces/IOptiSwap.sol";
import "./interfaces/IVeloVoter.sol";
import "./interfaces/IVeloPairFactory.sol";
import "./interfaces/IVeloGauge.sol";
import "./interfaces/IVeloRouter.sol";
import "./interfaces/IBaseV1Pair.sol";
import "./interfaces/IVeloVaultToken.sol";
import "./interfaces/IUniswapV2Pair.sol";
import "./interfaces/IERC20.sol";
import "./libraries/SafeToken.sol";
import "./libraries/Math.sol";

interface OptiSwapPair {
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
}

contract VeloVaultToken is IVeloVaultToken, PoolToken {
    using SafeToken for address;

    bool public constant isVaultToken = true;
    bool public constant stable = false;

    address public optiSwap;
    address public router;
    address public voter;
    address public gauge;
    address public pairFactory;
    address public rewardsToken;
    address public WETH;
    address public token0;
    address public token1;

    uint256 public constant MIN_REINVEST_BOUNTY = 0.001e18;
    uint256 public constant MAX_REINVEST_BOUNTY = 0.01e18;
    uint256 public REINVEST_BOUNTY = MAX_REINVEST_BOUNTY;

    event Reinvest(address indexed caller, uint256 reward, uint256 bounty);
    event UpdateReinvestBounty(uint256 _newReinvestBounty);

    function _initialize(
        address _underlying,
        address _optiSwap,
        address _router,
        address _voter,
        address _pairFactory,
        address _rewardsToken
    ) external {
        require(factory == address(0), "VaultToken: FACTORY_ALREADY_SET"); // sufficient check
        factory = msg.sender;
        _setName("Tarot Vault Token", "vTAROT");
        underlying = _underlying;
        optiSwap = _optiSwap;
        voter = _voter;
        gauge = IVeloVoter(voter).gauges(underlying);
        require(gauge != address(0), "VaultToken: NO_GAUGE");
        router = _router;
        pairFactory = _pairFactory;
        WETH = IVeloRouter(_router).weth();
        (token0, token1) = IBaseV1Pair(_underlying).tokens();
        rewardsToken = _rewardsToken;
        rewardsToken.safeApprove(address(router), uint256(-1));
        WETH.safeApprove(address(router), uint256(-1));
        underlying.safeApprove(address(gauge), uint256(-1));
    }

    function updateReinvestBounty(uint256 _newReinvestBounty) external onlyFactoryOwner {
        require(_newReinvestBounty >= MIN_REINVEST_BOUNTY && _newReinvestBounty <= MAX_REINVEST_BOUNTY, "VaultToken: INVLD_REINVEST_BOUNTY");
        REINVEST_BOUNTY = _newReinvestBounty;

        emit UpdateReinvestBounty(_newReinvestBounty);
    }

    /*** PoolToken Overrides ***/

    function _update() internal {
        uint256 _totalBalance = IVeloGauge(gauge).balanceOf(address(this));
        totalBalance = _totalBalance;
        emit Sync(_totalBalance);
    }

    // this low-level function should be called from another contract
    function mint(address minter) external nonReentrant update returns (uint256 mintTokens) {
        uint256 mintAmount = underlying.myBalance();
        // handle pools with deposit fees by checking balance before and after deposit
        uint256 _totalBalanceBefore = IVeloGauge(gauge).balanceOf(address(this));
        IVeloGauge(gauge).deposit(mintAmount, 0);
        uint256 _totalBalanceAfter = IVeloGauge(gauge).balanceOf(address(this));
        mintTokens = _totalBalanceAfter.sub(_totalBalanceBefore).mul(1e18).div(exchangeRate());

        if (totalSupply == 0) {
            // permanently lock the first MINIMUM_LIQUIDITY tokens
            mintTokens = mintTokens.sub(MINIMUM_LIQUIDITY);
            _mint(address(0), MINIMUM_LIQUIDITY);
        }
        require(mintTokens > 0, "VaultToken: MINT_AMOUNT_ZERO");
        _mint(minter, mintTokens);
        emit Mint(msg.sender, minter, mintAmount, mintTokens);
    }

    // this low-level function should be called from another contract
    function redeem(address redeemer) external nonReentrant update returns (uint256 redeemAmount) {
        uint256 redeemTokens = balanceOf[address(this)];
        redeemAmount = redeemTokens.mul(exchangeRate()).div(1e18);

        require(redeemAmount > 0, "VaultToken: REDEEM_AMOUNT_ZERO");
        require(redeemAmount <= totalBalance, "VaultToken: INSUFFICIENT_CASH");
        _burn(address(this), redeemTokens);
        IVeloGauge(gauge).withdraw(redeemAmount);
        _safeTransfer(redeemer, redeemAmount);
        emit Redeem(msg.sender, redeemer, redeemAmount, redeemTokens);
    }

    /*** Reinvest ***/

    function _optimalDepositA(
        uint256 _amountA,
        uint256 _reserveA
    ) internal view returns (uint256) {
        uint256 swapFee = IVeloPairFactory(pairFactory).getFee(false);
        uint256 swapFeeFactor = uint256(10000).sub(swapFee);
        uint256 a = uint256(10000).add(swapFeeFactor).mul(_reserveA);
        uint256 b = _amountA.mul(10000).mul(_reserveA).mul(4).mul(swapFeeFactor);
        uint256 c = Math.sqrt(a.mul(a).add(b));
        uint256 d = uint256(2).mul(swapFeeFactor);
        return c.sub(a).div(d);
    }

    function approveRouter(address token, uint256 amount) internal {
        if (IERC20(token).allowance(address(this), router) >= amount) return;
        token.safeApprove(address(router), uint256(-1));
    }

    function swapExactTokensForTokens(
        address tokenIn,
        address tokenOut,
        uint256 amount
    ) internal {
        approveRouter(tokenIn, amount);
        IVeloRouter(router).swapExactTokensForTokensSimple(amount, 0, tokenIn, tokenOut, false, address(this), block.timestamp);
    }

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountA,
        uint256 amountB
    ) internal returns (uint256 liquidity) {
        approveRouter(tokenA, amountA);
        approveRouter(tokenB, amountB);
        (, , liquidity) = IVeloRouter(router).addLiquidity(tokenA, tokenB, false, amountA, amountB, 0, 0, address(this), block.timestamp);
    }

    function swapTokensForBestAmountOut(
        IOptiSwap _optiSwap,
        address tokenIn,
        address tokenOut,
        uint256 amountIn
    ) internal returns (uint256 amountOut) {
        if (tokenIn == tokenOut) {
            return amountIn;
        }
        address pair;
        (pair, amountOut) = _optiSwap.getBestAmountOut(amountIn, tokenIn, tokenOut);
        require(pair != address(0), "NO_PAIR");
        tokenIn.safeTransfer(pair, amountIn);
        if (tokenIn < tokenOut) {
            OptiSwapPair(pair).swap(0, amountOut, address(this), new bytes(0));
        } else {
            OptiSwapPair(pair).swap(amountOut, 0, address(this), new bytes(0));
        }
    }

    function optiSwapExactTokensForTokens(
        address tokenIn,
        address tokenOut,
        uint256 amountIn
    ) internal returns (uint256 amountOut) {
        if (tokenIn == tokenOut) {
            return amountIn;
        }
        IOptiSwap _optiSwap = IOptiSwap(optiSwap);
        address nextHop = _optiSwap.getBridgeToken(tokenIn);
        if (nextHop == tokenOut) {
            return swapTokensForBestAmountOut(_optiSwap, tokenIn, tokenOut, amountIn);
        }
        address waypoint = _optiSwap.getBridgeToken(tokenOut);
        if (tokenIn == waypoint) {
            return swapTokensForBestAmountOut(_optiSwap, tokenIn, tokenOut, amountIn);
        }
        uint256 hopAmountOut;
        if (nextHop != tokenIn) {
            hopAmountOut = swapTokensForBestAmountOut(_optiSwap, tokenIn, nextHop, amountIn);
        } else {
            hopAmountOut = amountIn;
        }
        if (nextHop == waypoint) {
            return swapTokensForBestAmountOut(_optiSwap, nextHop, tokenOut, hopAmountOut);
        } else if (waypoint == tokenOut) {
            return optiSwapExactTokensForTokens(nextHop, tokenOut, hopAmountOut);
        } else {
            uint256 waypointAmountOut = optiSwapExactTokensForTokens(nextHop, waypoint, hopAmountOut);
            return swapTokensForBestAmountOut(_optiSwap, waypoint, tokenOut, waypointAmountOut);
        }
    }

    function _getReward() internal returns (uint256 amount) {
        address[] memory tokens = new address[](1);
        tokens[0] = rewardsToken;
        IVeloGauge(gauge).getReward(address(this), tokens);

        return rewardsToken.myBalance();
    }

    function getReward() external nonReentrant returns (uint256) {
        require(msg.sender == tx.origin);
        return _getReward();
    }

    function reinvest() external nonReentrant update {
        require(msg.sender == tx.origin);
        // 1. Withdraw all the rewards.
        uint256 reward = _getReward();
        if (reward == 0) return;
        // 2. Send the reward bounty to the caller.
        uint256 bounty = reward.mul(REINVEST_BOUNTY) / 1e18;
        rewardsToken.safeTransfer(msg.sender, bounty);
        // 3. Convert all the remaining rewards to token0 or token1.
        address tokenA;
        address tokenB;
        if (token0 == rewardsToken || token1 == rewardsToken) {
            (tokenA, tokenB) = token0 == rewardsToken ? (token0, token1) : (token1, token0);
        } else {
            if (token1 == WETH) {
                (tokenA, tokenB) = (token1, token0);
            } else {
                (tokenA, tokenB) = (token0, token1);
            }
            optiSwapExactTokensForTokens(rewardsToken, tokenA, reward.sub(bounty));
        }
        // 4. Convert tokenA to LP Token underlyings.
        uint256 totalAmountA = tokenA.myBalance();
        assert(totalAmountA > 0);
        (uint256 r0, uint256 r1, ) = IUniswapV2Pair(underlying).getReserves();
        uint256 reserveA = tokenA == token0 ? r0 : r1;
        uint256 swapAmount = _optimalDepositA(totalAmountA, reserveA);
        swapExactTokensForTokens(tokenA, tokenB, swapAmount);
        uint256 liquidity = addLiquidity(tokenA, tokenB, totalAmountA.sub(swapAmount), tokenB.myBalance());
        // 5. Stake the LP Tokens.
        IVeloGauge(gauge).deposit(liquidity, 0);
        emit Reinvest(msg.sender, reward, bounty);
    }

    function adminClaimRewards(address[] calldata _tokens) external onlyFactoryOwner nonReentrant {
        IVeloGauge(gauge).getReward(address(this), _tokens);
    }

    function adminRescueTokens(address _to, address[] calldata _tokens) external onlyFactoryOwner nonReentrant {
        require(_to != address(0), "VaultToken: INVLD_TO");

        for (uint256 i = 0; i < _tokens.length; i++) {
            address token = _tokens[i];
            require(token != underlying, "VaultToken: IS_UNDERLYING");
            require(token != rewardsToken, "VaultToken: IS_REWARDS_TOKEN");
            require(token != token0, "VaultToken: IS_TOKEN_0");
            require(token != token1, "VaultToken: IS_TOKEN_1");

            uint256 tokenBalance = token.myBalance();
            if (tokenBalance > 0) {
                token.safeTransfer(_to, tokenBalance);
            }
        }
    }

    /*** Mirrored From uniswapV2Pair ***/

    function getReserves()
        external
        view
        returns (
            uint112 reserve0,
            uint112 reserve1,
            uint32 blockTimestampLast
        )
    {
        (uint _reserve0, uint _reserve1, uint _blockTimestampLast) = IUniswapV2Pair(underlying).getReserves();
        reserve0 = safe112(_reserve0);
        reserve1 = safe112(_reserve1);
        blockTimestampLast = uint32(_blockTimestampLast % 2**32);
        // if no token has been minted yet mirror uniswap getReserves
        if (totalSupply == 0) return (reserve0, reserve1, blockTimestampLast);
        // else, return the underlying reserves of this contract
        uint256 _totalBalance = totalBalance;
        uint256 _totalSupply = IUniswapV2Pair(underlying).totalSupply();
        reserve0 = safe112(_totalBalance.mul(reserve0).div(_totalSupply));
        reserve1 = safe112(_totalBalance.mul(reserve1).div(_totalSupply));
        require(reserve0 > 100 && reserve1 > 100, "VaultToken: INSUFFICIENT_RESERVES");
    }

    /*** Mirrored from BaseV1Pair ***/

    function observationLength() external view returns (uint) {
        return IBaseV1Pair(underlying).observationLength();
    }

    function observations(uint index)
        external
        view
        returns (
            uint timestamp,
            uint reserve0Cumulative,
            uint reserve1Cumulative
        )
    {
        return IBaseV1Pair(underlying).observations(index);
    }

    function currentCumulativePrices()
        external
        view
        returns (
            uint reserve0Cumulative,
            uint reserve1Cumulative,
            uint timestamp
        )
    {
        return IBaseV1Pair(underlying).currentCumulativePrices();
    }

    /*** Utilities ***/

    function safe112(uint256 n) internal pure returns (uint112) {
        require(n < 2**112, "VaultToken: SAFE112");
        return uint112(n);
    }

    function getBlockTimestamp() public view returns (uint32) {
        return uint32(block.timestamp % 2**32);
    }

    /*** Modifiers ***/

    modifier onlyFactoryOwner() {
        require(Ownable(factory).owner() == msg.sender, "NOT_AUTHORIZED");
        _;
    }
}

File 2 of 18 : Ownable.sol
pragma solidity ^0.5.0;

import "../GSN/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.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
contract Ownable is Context {
    address private _owner;

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

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

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

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

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

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

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

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

File 3 of 18 : PoolToken.sol
pragma solidity =0.5.16;

import "./TarotERC20.sol";
import "./interfaces/IERC20.sol";
import "./interfaces/IPoolToken.sol";
import "./libraries/SafeMath.sol";

contract PoolToken is IPoolToken, TarotERC20 {
    uint256 internal constant initialExchangeRate = 1e18;
    address public underlying;
    address public factory;
    uint256 public totalBalance;
    uint256 public constant MINIMUM_LIQUIDITY = 1000;

    event Mint(
        address indexed sender,
        address indexed minter,
        uint256 mintAmount,
        uint256 mintTokens
    );
    event Redeem(
        address indexed sender,
        address indexed redeemer,
        uint256 redeemAmount,
        uint256 redeemTokens
    );
    event Sync(uint256 totalBalance);

    /*** Initialize ***/

    // called once by the factory
    function _setFactory() external {
        require(factory == address(0), "Tarot: FACTORY_ALREADY_SET");
        factory = msg.sender;
    }

    /*** PoolToken ***/

    function _update() internal {
        totalBalance = IERC20(underlying).balanceOf(address(this));
        emit Sync(totalBalance);
    }

    function exchangeRate() public view returns (uint256) {
        uint256 _totalSupply = totalSupply; // gas savings
        uint256 _totalBalance = totalBalance; // gas savings
        if (_totalSupply == 0 || _totalBalance == 0) return initialExchangeRate;
        return _totalBalance.mul(1e18).div(_totalSupply);
    }

    // this low-level function should be called from another contract
    function mint(address minter)
        external
        nonReentrant
        update
        returns (uint256 mintTokens)
    {
        uint256 balance = IERC20(underlying).balanceOf(address(this));
        uint256 mintAmount = balance.sub(totalBalance);
        mintTokens = mintAmount.mul(1e18).div(exchangeRate());

        if (totalSupply == 0) {
            // permanently lock the first MINIMUM_LIQUIDITY tokens
            mintTokens = mintTokens.sub(MINIMUM_LIQUIDITY);
            _mint(address(0), MINIMUM_LIQUIDITY);
        }
        require(mintTokens > 0, "Tarot: MINT_AMOUNT_ZERO");
        _mint(minter, mintTokens);
        emit Mint(msg.sender, minter, mintAmount, mintTokens);
    }

    // this low-level function should be called from another contract
    function redeem(address redeemer)
        external
        nonReentrant
        update
        returns (uint256 redeemAmount)
    {
        uint256 redeemTokens = balanceOf[address(this)];
        redeemAmount = redeemTokens.mul(exchangeRate()).div(1e18);

        require(redeemAmount > 0, "Tarot: REDEEM_AMOUNT_ZERO");
        require(redeemAmount <= totalBalance, "Tarot: INSUFFICIENT_CASH");
        _burn(address(this), redeemTokens);
        _safeTransfer(redeemer, redeemAmount);
        emit Redeem(msg.sender, redeemer, redeemAmount, redeemTokens);
    }

    // force real balance to match totalBalance
    function skim(address to) external nonReentrant {
        _safeTransfer(
            to,
            IERC20(underlying).balanceOf(address(this)).sub(totalBalance)
        );
    }

    // force totalBalance to match real balance
    function sync() external nonReentrant update {}

    /*** Utilities ***/

    // same safe transfer function used by UniSwapV2 (with fixed underlying)
    bytes4 private constant SELECTOR =
        bytes4(keccak256(bytes("transfer(address,uint256)")));

    function _safeTransfer(address to, uint256 amount) internal {
        (bool success, bytes memory data) = underlying.call(
            abi.encodeWithSelector(SELECTOR, to, amount)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "Tarot: TRANSFER_FAILED"
        );
    }

    // prevents a contract from calling itself, directly or indirectly.
    bool internal _notEntered = true;
    modifier nonReentrant() {
        require(_notEntered, "Tarot: REENTERED");
        _notEntered = false;
        _;
        _notEntered = true;
    }

    // update totalBalance with current balance
    modifier update() {
        _;
        _update();
    }
}

File 4 of 18 : IOptiSwap.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

interface IOptiSwap {
    function weth() external view returns (address);

    function bridgeFromTokens(uint256 index) external view returns (address token);

    function bridgeFromTokensLength() external view returns (uint256);

    function getBridgeToken(address _token) external view returns (address bridgeToken);

    function addBridgeToken(address _token, address _bridgeToken) external;

    function getDexInfo(uint256 index) external view returns (address dex, address handler);

    function dexListLength() external view returns (uint256);

    function indexOfDex(address _dex) external view returns (uint256);

    function getDexEnabled(address _dex) external view returns (bool);

    function addDex(address _dex, address _handler) external;

    function removeDex(address _dex) external;

    function getBestAmountOut(
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut
    ) external view returns (address pair, uint256 amountOut);
}

File 5 of 18 : IVeloVoter.sol
pragma solidity >=0.5.0;

interface IVeloVoter {
    function _ve() external view returns (address);
    function governor() external view returns (address);
    function emergencyCouncil() external view returns (address);
    function attachTokenToGauge(uint _tokenId, address account) external;
    function detachTokenFromGauge(uint _tokenId, address account) external;
    function emitDeposit(uint _tokenId, address account, uint amount) external;
    function emitWithdraw(uint _tokenId, address account, uint amount) external;
    function isWhitelisted(address token) external view returns (bool);
    function notifyRewardAmount(uint amount) external;
    function distribute(address _gauge) external;
    function gauges(address token) external view returns (address);
}

File 6 of 18 : IVeloPairFactory.sol
pragma solidity >=0.5.0;

interface IVeloPairFactory {
    function allPairsLength() external view returns (uint);
    function isPair(address pair) external view returns (bool);
    function pairCodeHash() external pure returns (bytes32);
    function getPair(address tokenA, address token, bool stable) external view returns (address);
    function createPair(address tokenA, address tokenB, bool stable) external returns (address pair);
    function getFee(bool _stable) external view returns (uint);
}

File 7 of 18 : IVeloGauge.sol
pragma solidity >=0.5.0;

interface IVeloGauge {
    function notifyRewardAmount(address token, uint amount) external;
    function getReward(address account, address[] calldata tokens) external;
    function claimFees() external returns (uint claimed0, uint claimed1);
    function left(address token) external view returns (uint);
    function isForPair() external view returns (bool);
    function earned(address token, address account) external view returns (uint);
    function balanceOf(address account) external view returns (uint);
    function deposit(uint256 amount, uint256 tokenId) external;
    function withdraw(uint256 amount) external;
}

File 8 of 18 : IVeloRouter.sol
pragma solidity >=0.5.0;

interface IVeloRouter {
  function weth() external pure returns (address);

  function addLiquidity(
    address tokenA,
    address tokenB,
    bool stable,
    uint256 amountADesired,
    uint256 amountBDesired,
    uint256 amountAMin,
    uint256 amountBMin,
    address to,
    uint256 deadline
  ) external returns (uint amountA, uint amountB, uint liquidity);

  function swapExactTokensForTokensSimple(
    uint256 amountIn,
    uint256 amountOutMin,
    address tokenFrom,
    address tokenTo,
    bool stable,
    address to,
    uint256 deadline
  ) external returns (uint[] memory amounts);
}

File 9 of 18 : IBaseV1Pair.sol
pragma solidity >=0.5.0;

interface IBaseV1Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function stable() external view returns (bool);
    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 token0() external view returns (address);
    function token1() external view returns (address);
    function tokens() external view returns (address, address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);

    function observationLength() external view returns (uint);
    function observations(uint) external view returns (
        uint timestamp,
        uint reserve0Cumulative,
        uint reserve1Cumulative
    );
    function currentCumulativePrices() external view returns (
        uint reserve0Cumulative,
        uint reserve1Cumulative,
        uint timestamp
    );
}

File 10 of 18 : IVeloVaultToken.sol
pragma solidity >=0.5.0;

interface IVeloVaultToken {
    /*** Tarot ERC20 ***/

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

    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function allowance(address owner, address spender) external view returns (uint256);

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

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

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint256);

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /*** Pool Token ***/

    event Mint(address indexed sender, address indexed minter, uint256 mintAmount, uint256 mintTokens);
    event Redeem(address indexed sender, address indexed redeemer, uint256 redeemAmount, uint256 redeemTokens);
    event Sync(uint256 totalBalance);

    function underlying() external view returns (address);

    function factory() external view returns (address);

    function totalBalance() external view returns (uint256);

    function MINIMUM_LIQUIDITY() external pure returns (uint256);

    function exchangeRate() external view returns (uint256);

    function mint(address minter) external returns (uint256 mintTokens);

    function redeem(address redeemer) external returns (uint256 redeemAmount);

    function skim(address to) external;

    function sync() external;

    function _setFactory() external;

    /*** VaultToken ***/

    event Reinvest(address indexed caller, uint256 reward, uint256 bounty);

    function isVaultToken() external pure returns (bool);

    function stable() external pure returns (bool);

    function optiSwap() external view returns (address);

    function router() external view returns (address);

    function voter() external view returns (address);

    function pairFactory() external view returns (address);

    function rewardsToken() external view returns (address);

    function WETH() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function REINVEST_BOUNTY() external view returns (uint256);

    function updateReinvestBounty(uint256 _newReinvestBounty) external;

    function getReserves()
        external
        view
        returns (
            uint112 reserve0,
            uint112 reserve1,
            uint32 blockTimestampLast
        );

    function observationLength() external view returns (uint);

    function observations(uint index)
        external
        view
        returns (
            uint timestamp,
            uint reserve0Cumulative,
            uint reserve1Cumulative
        );

    function currentCumulativePrices()
        external
        view
        returns (
            uint reserve0Cumulative,
            uint reserve1Cumulative,
            uint timestamp
        );

    function _initialize(
        address _underlying,
        address _optiSwap,
        address _router,
        address _voter,
        address _pairFactory,
        address _rewardsToken
    ) external;

    function reinvest() external;

    function getReward() external returns (uint256);

    function getBlockTimestamp() external view returns (uint32);

    function adminClaimRewards(address[] calldata _tokens) external;

    function adminRescueTokens(address _to, address[] calldata _tokens) external;
}

File 11 of 18 : IUniswapV2Pair.sol
pragma solidity >=0.5.0;

interface IUniswapV2Pair {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);

    function totalSupply() external view returns (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

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

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

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);

    function 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 (uint256);

    function price1CumulativeLast() external view returns (uint256);
}

File 12 of 18 : IERC20.sol
pragma solidity >=0.5.0;

interface IERC20 {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);

    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 owner) external view returns (uint256);

    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

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

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

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);
}

File 13 of 18 : SafeToken.sol
pragma solidity 0.5.16;

interface ERC20Interface {
    function balanceOf(address user) external view returns (uint256);
}

library SafeToken {
    function myBalance(address token) internal view returns (uint256) {
        return ERC20Interface(token).balanceOf(address(this));
    }

    function balanceOf(address token, address user)
        internal
        view
        returns (uint256)
    {
        return ERC20Interface(token).balanceOf(user);
    }

    function safeApprove(
        address token,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('approve(address,uint256)')));
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(0x095ea7b3, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "!safeApprove"
        );
    }

    function safeTransfer(
        address token,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('transfer(address,uint256)')));
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(0xa9059cbb, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "!safeTransfer"
        );
    }

    function safeTransferFrom(
        address token,
        address from,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(0x23b872dd, from, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "!safeTransferFrom"
        );
    }

    function safeTransferETH(address to, uint256 value) internal {
        (bool success, ) = to.call.value(value)(new bytes(0));
        require(success, "!safeTransferETH");
    }
}

File 14 of 18 : Math.sol
pragma solidity =0.5.16;

// a library for performing various math operations
// forked from: https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/libraries/Math.sol

library Math {
    function min(uint256 x, uint256 y) internal pure returns (uint256 z) {
        z = x < y ? x : y;
    }

    // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
    function sqrt(uint256 y) internal pure returns (uint256 z) {
        if (y > 3) {
            z = y;
            uint256 x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }
}

File 15 of 18 : Context.sol
pragma solidity ^0.5.0;

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

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

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

File 16 of 18 : TarotERC20.sol
pragma solidity =0.5.16;

import "./libraries/SafeMath.sol";

// This contract is basically UniswapV2ERC20 with small modifications
// src: https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol

contract TarotERC20 {
    using SafeMath for uint256;

    string public name;
    string public symbol;
    uint8 public decimals = 18;
    uint256 public totalSupply;
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    bytes32 public DOMAIN_SEPARATOR;
    mapping(address => uint256) public nonces;

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

    constructor() public {}

    function _setName(string memory _name, string memory _symbol) internal {
        name = _name;
        symbol = _symbol;
        uint256 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, uint256 value) internal {
        totalSupply = totalSupply.add(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(address(0), to, value);
    }

    function _burn(address from, uint256 value) internal {
        balanceOf[from] = balanceOf[from].sub(value);
        totalSupply = totalSupply.sub(value);
        emit Transfer(from, address(0), value);
    }

    function _approve(
        address owner,
        address spender,
        uint256 value
    ) private {
        allowance[owner][spender] = value;
        emit Approval(owner, spender, value);
    }

    function _transfer(
        address from,
        address to,
        uint256 value
    ) internal {
        balanceOf[from] = balanceOf[from].sub(
            value,
            "Tarot: TRANSFER_TOO_HIGH"
        );
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(from, to, value);
    }

    function approve(address spender, uint256 value) external returns (bool) {
        _approve(msg.sender, spender, value);
        return true;
    }

    function transfer(address to, uint256 value) external returns (bool) {
        _transfer(msg.sender, to, value);
        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool) {
        if (allowance[from][msg.sender] != uint256(-1)) {
            allowance[from][msg.sender] = allowance[from][msg.sender].sub(
                value,
                "Tarot: TRANSFER_NOT_ALLOWED"
            );
        }
        _transfer(from, to, value);
        return true;
    }

    function _checkSignature(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s,
        bytes32 typehash
    ) internal {
        require(deadline >= block.timestamp, "Tarot: EXPIRED");
        bytes32 digest = keccak256(
            abi.encodePacked(
                "\x19\x01",
                DOMAIN_SEPARATOR,
                keccak256(
                    abi.encode(
                        typehash,
                        owner,
                        spender,
                        value,
                        nonces[owner]++,
                        deadline
                    )
                )
            )
        );
        address recoveredAddress = ecrecover(digest, v, r, s);
        require(
            recoveredAddress != address(0) && recoveredAddress == owner,
            "Tarot: INVALID_SIGNATURE"
        );
    }

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

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external {
        _checkSignature(
            owner,
            spender,
            value,
            deadline,
            v,
            r,
            s,
            PERMIT_TYPEHASH
        );
        _approve(owner, spender, value);
    }
}

File 17 of 18 : IPoolToken.sol
pragma solidity >=0.5.0;

interface IPoolToken {
    /*** Tarot ERC20 ***/

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

    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

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

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

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint256);

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /*** Pool Token ***/

    event Mint(
        address indexed sender,
        address indexed minter,
        uint256 mintAmount,
        uint256 mintTokens
    );
    event Redeem(
        address indexed sender,
        address indexed redeemer,
        uint256 redeemAmount,
        uint256 redeemTokens
    );
    event Sync(uint256 totalBalance);

    function underlying() external view returns (address);

    function factory() external view returns (address);

    function totalBalance() external view returns (uint256);

    function MINIMUM_LIQUIDITY() external pure returns (uint256);

    function exchangeRate() external view returns (uint256);

    function mint(address minter) external returns (uint256 mintTokens);

    function redeem(address redeemer) external returns (uint256 redeemAmount);

    function skim(address to) external;

    function sync() external;

    function _setFactory() external;
}

File 18 of 18 : SafeMath.sol
pragma solidity =0.5.16;

// 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;
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

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pe":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"currentCumulativePrices","outputs":[{"internalType":"uint256","name":"reserve0Cumulative","type":"uint256"},{"internalType":"uint256","name":"reserve1Cumulative","type":"uint256"},{"internalType":"uint256","name":"timestamp","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"exchangeRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"gauge","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"getBlockTimestamp","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"getReserves","outputs":[{"internalType":"uint112","name":"reserve0","type":"uint112"},{"internalType":"uint112","name":"reserve1","type":"uint112"},{"internalType":"uint32","name":"blockTimestampLast","type":"uint32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"getReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"isVaultToken","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"minter","type":"address"}],"name":"mint","outputs":[{"internalType":"uint256","name":"mintTokens","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"observationLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"observations","outputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"uint256","name":"reserve0Cumulative","type":"uint256"},{"internalType":"uint256","name":"reserve1Cumulative","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"optiSwap","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"pairFactory","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"redeemer","type":"address"}],"name":"redeem","outputs":[{"internalType":"uint256","name":"redeemAmount","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"reinvest","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"rewardsToken","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"router","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"skim","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"stable","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"sync","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"token0","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"token1","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"underlying","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"_newReinvestBounty","type":"uint256"}],"name":"updateReinvestBounty","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"voter","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"}]

Deployed Bytecode

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Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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