Contract 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 18

 
Txn Hash Method
Block
From
To
Value
0xc5408ff8b1de3f81989de75643d53c3e9876b195e27fa91021b90d65e60821b2Withdraw1180173512024-03-28 13:44:393 mins ago0x55c9c1ef81ca4eaab2dc489fa06d767c89e61bf7 IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000088472650.044679781
0x1efff4954268b57d61b78c6d805fb432f73f1be2b3bf8ad331bad4fed8acff08Deposit1180159382024-03-28 12:57:3350 mins ago0x0af640d56210545b52eb119a10ace8b463ca2614 IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000036952070.030483132
0x38d3fdb1a7264bc620197290bf69b4adaa673e56eb306e1832755f8ee79a8276Harvest1180125852024-03-28 11:05:472 hrs 41 mins ago0x370d72bd11ecbc9535d07c0ca969ccb6b2485f2a IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000034515350.0302536
0x7446ae80da5a1c9ccb964bc3eb1496d19846a39cdcb79d3216ea1e6124cc3b98Deposit1180125712024-03-28 11:05:192 hrs 42 mins ago0x370d72bd11ecbc9535d07c0ca969ccb6b2485f2a IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000042028350.0302171
0x11a827adb2a33d63ec61e1c88b951d5155f44c3e3114f608271a17cb84e1a49fWithdraw1180124932024-03-28 11:02:432 hrs 44 mins ago0xe22477e3cbd246214ed15298352500f14de10e5e IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000044472230.02994341
0x1431206d8d9d5397e5b4027aae2b66aa98f0ae0b3ebd4d3fde9d3e228b66a36eHarvest1180021842024-03-28 5:19:058 hrs 28 mins ago0x10c5f89cb714d908e4cc3db31c4d551d6ee15061 IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000046528850.029967062
0x1cc74b808310c4c99de03a974df8c9c5466df8ac015279b3cc525dc0915aa8abHarvest1180007872024-03-28 4:32:319 hrs 15 mins ago0xefdb09ed95cbd86a977f4d24f4bf3a2d7b45e1ac IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000056831210.030486712
0xf32da9685b5f60a44d8a2757af43670943e5c4e9270b2d0078402ae8cbead131Deposit1179955292024-03-28 1:37:1512 hrs 10 mins ago0x714b831eb02fe854283219b2b9f1c6951f46dcb9 IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000075924010.0295288
0x5b25d80d3a9f96f1b4357b229cdc53cf0638c3cc7424f741176ad9b764defe0cDeposit1179882772024-03-27 21:35:3116 hrs 12 mins ago0x2e25db5f4570a81c8e7764ccecea863a2420faea IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000039210060.0294019
0x5855e27d890bc444084442b7e546493c90785c68c056cbc830fd9d9274aa9829Deposit1179852042024-03-27 19:53:0517 hrs 54 mins ago0x714b831eb02fe854283219b2b9f1c6951f46dcb9 IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000047739960.0306299
0x687c2e90c7fa5ff546c153678966411db526b6193496d6225653fb96aee684ddWithdraw1179840752024-03-27 19:15:2718 hrs 32 mins ago0xf03df93a77ff6a07c0e6ae2c0e59d9dbf13001bb IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.000008468250.031346844
0xaadc50f104802cd75b8742895fe161c3d04613dfffca59caf62e51fe2cfed22eHarvest1179834952024-03-27 18:56:0718 hrs 51 mins ago0xf03df93a77ff6a07c0e6ae2c0e59d9dbf13001bb IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000058641690.031973739
0x7eaf00606e705b874d2b19723fb2731cc34b62663edf8bcd48f29f31d6e6177bDeposit1179819592024-03-27 18:04:5519 hrs 42 mins ago0x714b831eb02fe854283219b2b9f1c6951f46dcb9 IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000103952980.0295635
0x6173dbbbeb9387294aa654836f7732f061e84ec025afcc9c8e7e626714f14578Withdraw1179808102024-03-27 17:26:3720 hrs 21 mins ago0x3a95ac31729140d6ac25c80b90eceec9b929eb9e IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000087110890.0300806
0xf07cb756f05ebbcabc540d4009e5bf71a92a455cf13f517ac78d3c7c42941f18Harvest1179807892024-03-27 17:25:5520 hrs 21 mins ago0x3a95ac31729140d6ac25c80b90eceec9b929eb9e IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000068409490.0297647
0x262ab9d0e0e996ca384b7453b2090f03c38249c37e9cd0e7a1e9869c608aa8b1Withdraw1179728932024-03-27 13:02:431 day 44 mins ago0xc98651e36230d55639660303e117f143051fa8be IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000019955330.017071533
0xfa1fbcf43d005c3815925d6b3229befcd0735dfb21ab8fd6c8961c3982282269Harvest1179728122024-03-27 13:00:011 day 47 mins ago0xc98651e36230d55639660303e117f143051fa8be IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000016878930.015943539
0xf62801d75824914941d2cc1baf148f02b67e7128c5ba5afe2c39f07926b15835Withdraw1179727942024-03-27 12:59:251 day 48 mins ago0x4e06439c3301872eec0c4c6d1db5a2b740fb989b IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000020754670.015994396
0x8587d66725b7095a8d2c6be5e73217e5d873dab5af1727c14397b7c56ab28394Withdraw1179721042024-03-27 12:36:251 day 1 hr ago0xe15ebb6573496fd6860f7194285375fb94c9a7c2 IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.00000194740.0152583
0x76fc3958951bd26aabe076f8924d66cafefb39277337c1cadf3c0cacc897c737Withdraw1179661582024-03-27 9:18:131 day 4 hrs ago0x99ad066a1d7f94ee2d404c5b556e69a68a3b15d4 IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000018494250.016809219
0x03155a948d2430b2edbad9a3213743ca656244d46f17648fa78ac11810903ebbWithdraw1179649532024-03-27 8:38:031 day 5 hrs ago0xd3dcea9ae8374aa15e67d6e98c02cb78ba30cfbf IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000018381210.014366206
0x60b0acd16727a702ba742427bd75efe3681784f5ac765a2955c27fbeff528bc3Withdraw1179645002024-03-27 8:22:571 day 5 hrs ago0xca3459c85009d657393717d7e0072a42f0c69733 IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.000001645420.0148873
0xe112a8c533dc984333d3e3c77e0ba99eed9deda45f30610de7abd550cdba0e5cDeposit1179571352024-03-27 4:17:271 day 9 hrs ago0x1d7ad01ba1b4e1daa20bd4c0de4d495cceeb2442 IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000017169850.0146655
0x3ca88a19bad2dc0e7bcd72354c12119d765e612c5710ba12a7f4434a39559d1dWithdraw1179487022024-03-26 23:36:211 day 14 hrs ago0x5eaa3414682fea1b3639515f7877ec96ac614646 IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000018693150.014507458
0xa822834f4d23243d5a9e4b19ee494c490738ba383ad6fd7c4f69b4a86daf7b4bDeposit1179482102024-03-26 23:19:571 day 14 hrs ago0x714b831eb02fe854283219b2b9f1c6951f46dcb9 IN  0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH0.0000014976950.0148619
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x6bf5fa62d6068cb6dd01c1a496e530cadf95c34a6cbdba876b69f42bc66905ed1075581352023-07-30 11:04:07242 days 2 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 WOO: WOO Token0 ETH
0x6bf5fa62d6068cb6dd01c1a496e530cadf95c34a6cbdba876b69f42bc66905ed1075581352023-07-30 11:04:07242 days 2 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0xb54e1d90d845d888d39dcacbd54a3eec0d8853b20 ETH
0x1a9c4721e07c8109704822644f4587383344adc0c195f7d1f7b8f133ba1cf03e1075518042023-07-30 7:33:05242 days 6 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0xca7184ea1cb4cf04d49bf219c49a39231299da260 ETH
0x1a9c4721e07c8109704822644f4587383344adc0c195f7d1f7b8f133ba1cf03e1075518042023-07-30 7:33:05242 days 6 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0xca7184ea1cb4cf04d49bf219c49a39231299da260 ETH
0x2e19c87355a659875b2280e98b963a00c86852af9993c9bc23f17bc7278389e31075517892023-07-30 7:32:35242 days 6 hrs ago 0xca7184ea1cb4cf04d49bf219c49a39231299da26 0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH
0xa83f50436a85e44b17ee3f719ca6d66e9011a96bca8a8dfb7aae8b11ad69ec531075503432023-07-30 6:44:23242 days 7 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0x4bea23fc541c5bf0909d792a60e9bd0740657a990 ETH
0xa83f50436a85e44b17ee3f719ca6d66e9011a96bca8a8dfb7aae8b11ad69ec531075503432023-07-30 6:44:23242 days 7 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 WOO: WOO Token0 ETH
0xa83f50436a85e44b17ee3f719ca6d66e9011a96bca8a8dfb7aae8b11ad69ec531075503432023-07-30 6:44:23242 days 7 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0x4bea23fc541c5bf0909d792a60e9bd0740657a990 ETH
0x21846cb546e92364d41915de6b319b4799510291c4a32e32f71b96224edec8e41075433532023-07-30 2:51:23242 days 10 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0x4bea23fc541c5bf0909d792a60e9bd0740657a990 ETH
0x21846cb546e92364d41915de6b319b4799510291c4a32e32f71b96224edec8e41075433532023-07-30 2:51:23242 days 10 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 WOO: WOO Token0 ETH
0x21846cb546e92364d41915de6b319b4799510291c4a32e32f71b96224edec8e41075433532023-07-30 2:51:23242 days 10 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0x4bea23fc541c5bf0909d792a60e9bd0740657a990 ETH
0xe42ae6f16ac211d2e50682dbffa9d8907740c41f239dd2dd2ebf6348d33f87891075316102023-07-29 20:19:57242 days 17 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0xca7184ea1cb4cf04d49bf219c49a39231299da260 ETH
0xe42ae6f16ac211d2e50682dbffa9d8907740c41f239dd2dd2ebf6348d33f87891075316102023-07-29 20:19:57242 days 17 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 WOO: WOO Token0 ETH
0xe42ae6f16ac211d2e50682dbffa9d8907740c41f239dd2dd2ebf6348d33f87891075316102023-07-29 20:19:57242 days 17 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0xca7184ea1cb4cf04d49bf219c49a39231299da260 ETH
0xe3c8a2d8080c89fb0874b4792e1e75dcef5f2a4f5daac6b206c218352d44bf211075315892023-07-29 20:19:15242 days 17 hrs ago 0xca7184ea1cb4cf04d49bf219c49a39231299da26 0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH
0x0e97c967a3f97e3f159bbbad2d8c9c7c4119411d40523fafc0793fe347f26ca81075298992023-07-29 19:22:55242 days 18 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0xca7184ea1cb4cf04d49bf219c49a39231299da260 ETH
0x0e97c967a3f97e3f159bbbad2d8c9c7c4119411d40523fafc0793fe347f26ca81075298992023-07-29 19:22:55242 days 18 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0xca7184ea1cb4cf04d49bf219c49a39231299da260 ETH
0x3231dceff871080ca1eeca0044353ca451ec9513c7079fa7fe493856e974e69b1075298642023-07-29 19:21:45242 days 18 hrs ago 0xca7184ea1cb4cf04d49bf219c49a39231299da26 0xc0f8c29e3a9a7650a3f642e467d70087819926d60 ETH
0x92d9e119f23483643c36449f4eb95c1ad919ff105f00e7d20e94931385679f8a1075233002023-07-29 15:42:57242 days 22 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0xca7184ea1cb4cf04d49bf219c49a39231299da260 ETH
0x92d9e119f23483643c36449f4eb95c1ad919ff105f00e7d20e94931385679f8a1075233002023-07-29 15:42:57242 days 22 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 WOO: WOO Token0 ETH
0x92d9e119f23483643c36449f4eb95c1ad919ff105f00e7d20e94931385679f8a1075233002023-07-29 15:42:57242 days 22 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0xca7184ea1cb4cf04d49bf219c49a39231299da260 ETH
0x678a58479d88c7d36c24900ae882900998c824b88ec7b7fec6e4908b44052d631075213332023-07-29 14:37:23242 days 23 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0xca7184ea1cb4cf04d49bf219c49a39231299da260 ETH
0x678a58479d88c7d36c24900ae882900998c824b88ec7b7fec6e4908b44052d631075213332023-07-29 14:37:23242 days 23 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 WOO: WOO Token0 ETH
0x678a58479d88c7d36c24900ae882900998c824b88ec7b7fec6e4908b44052d631075213332023-07-29 14:37:23242 days 23 hrs ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0xca7184ea1cb4cf04d49bf219c49a39231299da260 ETH
0xa35d9369a414e0a3914066ea62381f8f1dd9d52cae92d2d7c8c7c946fe52d1b51075176062023-07-29 12:33:09243 days 1 hr ago 0xc0f8c29e3a9a7650a3f642e467d70087819926d6 0xca7184ea1cb4cf04d49bf219c49a39231299da260 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
MasterChefReward

Compiler Version
v0.8.14+commit.80d49f37

Optimization Enabled:
Yes with 20000 runs

Other Settings:
default evmVersion
File 1 of 12 : MasterChefReward.sol
// SPDX-License-Identifier: MIT

pragma solidity =0.8.14;

/*

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*
* MIT License
* ===========
*
* Copyright (c) 2020 WooTrade
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "./interfaces/IMasterChefReward.sol";
import "./libraries/TransferHelper.sol";

contract MasterChefReward is IMasterChefReward, Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20;
    using EnumerableSet for EnumerableSet.AddressSet;

    address public constant ETH_PLACEHOLDER_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    IERC20 public immutable reward;
    uint256 public rewardPerBlock;
    uint256 public totalAllocPoint;

    PoolInfo[] public poolInfo;
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;
    EnumerableSet.AddressSet private weTokenSet;

    constructor(IERC20 _reward, uint256 _rewardPerBlock) {
        reward = _reward;
        rewardPerBlock = _rewardPerBlock;
    }

    function poolLength() public view override returns (uint256) {
        return poolInfo.length;
    }

    function add(
        uint256 _allocPoint,
        IERC20 _weToken,
        IRewarder _rewarder
    ) external override onlyOwner {
        require(!weTokenSet.contains(address(_weToken)), "MCW: already added");
        // Sanity check to ensure _lpToken is an ERC20 token
        _weToken.balanceOf(address(this));
        // Sanity check if we add a rewarder
        if (address(_rewarder) != address(0)) {
            _rewarder.onRewarded(address(0), 0);
        }

        totalAllocPoint += _allocPoint;
        poolInfo.push(
            PoolInfo({
                weToken: _weToken,
                allocPoint: _allocPoint,
                lastRewardBlock: block.number,
                accTokenPerShare: 0,
                rewarder: _rewarder
            })
        );
        weTokenSet.add(address(_weToken));

        emit PoolAdded(poolLength() - 1, _allocPoint, _weToken, _rewarder);
    }

    function set(
        uint256 _pid,
        uint256 _allocPoint,
        IRewarder _rewarder
    ) external override onlyOwner {
        PoolInfo storage pool = poolInfo[_pid];
        if (pool.allocPoint != _allocPoint) {
            totalAllocPoint = totalAllocPoint + _allocPoint - pool.allocPoint;
            pool.allocPoint = _allocPoint;
        }

        if (address(_rewarder) != address(pool.rewarder)) {
            if (address(_rewarder) != address(0)) {
                _rewarder.onRewarded(address(0), 0);
            }
            pool.rewarder = _rewarder;
        }

        emit PoolSet(_pid, _allocPoint, pool.rewarder);
    }

    function pendingReward(uint256 _pid, address _user)
        external
        view
        override
        returns (uint256 pendingRewardAmount, uint256 pendingRewarderTokens)
    {
        PoolInfo memory pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accTokenPerShare = pool.accTokenPerShare;
        uint256 weTokenSupply = pool.weToken.balanceOf(address(this));
        if (block.number > pool.lastRewardBlock && weTokenSupply != 0) {
            uint256 blocks = block.number - pool.lastRewardBlock;
            uint256 totalRewardAmount = (blocks * rewardPerBlock * pool.allocPoint) / totalAllocPoint;
            accTokenPerShare += (totalRewardAmount * 1e12) / weTokenSupply;
        }
        pendingRewardAmount = (user.amount * accTokenPerShare) / 1e12 - user.rewardDebt;

        IRewarder rewarder = pool.rewarder;
        pendingRewarderTokens = address(rewarder) != address(0) ? rewarder.pendingTokens(_user) : 0;
    }

    // Update reward variables for all pools. Be careful of gas spending!
    function massUpdatePools() public override {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; pid++) {
            updatePool(pid);
        }
    }

    // Update reward variables of the given pool to be up-to-date.
    function updatePool(uint256 _pid) public override {
        PoolInfo storage pool = poolInfo[_pid];
        if (block.number > pool.lastRewardBlock) {
            uint256 weSupply = pool.weToken.balanceOf(address(this));
            if (weSupply > 0) {
                uint256 blocks = block.number - pool.lastRewardBlock;
                uint256 totalRewardAmount = (blocks * rewardPerBlock * pool.allocPoint) / totalAllocPoint;
                pool.accTokenPerShare += (totalRewardAmount * 1e12) / weSupply;
            }
            pool.lastRewardBlock = block.number;
            emit PoolUpdated(_pid, pool.lastRewardBlock, weSupply, pool.accTokenPerShare);
        }
    }

    function setRewardPerBlock(uint256 _rewardPerBlock) external override onlyOwner {
        require(_rewardPerBlock > 0, "Invalid value");
        massUpdatePools();
        rewardPerBlock = _rewardPerBlock;

        emit RewardPerBlockUpdated(_rewardPerBlock);
    }

    function deposit(uint256 _pid, uint256 _amount) external override nonReentrant {
        updatePool(_pid);
        address caller = _msgSender();
        PoolInfo memory pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][caller];

        if (user.amount > 0) {
            // Harvest reward
            uint256 pending = (user.amount * pool.accTokenPerShare) / 1e12 - user.rewardDebt;
            reward.safeTransfer(caller, pending);
            emit Harvest(caller, _pid, pending);
        }

        user.amount += _amount;
        user.rewardDebt = (user.amount * pool.accTokenPerShare) / 1e12;

        IRewarder _rewarder = pool.rewarder;
        if (address(_rewarder) != address(0)) {
            _rewarder.onRewarded(caller, user.amount);
        }

        pool.weToken.safeTransferFrom(caller, address(this), _amount);

        emit Deposit(caller, _pid, _amount);
    }

    function withdraw(uint256 _pid, uint256 _amount) external override nonReentrant {
        require(_amount > 0, "MCW: invalid value");
        updatePool(_pid);
        address caller = _msgSender();
        PoolInfo memory pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][caller];
        require(user.amount >= _amount, "MCW: !amount");

        if (user.amount > 0) {
            uint256 pending = (user.amount * pool.accTokenPerShare) / 1e12 - user.rewardDebt;
            reward.safeTransfer(caller, pending);
        }
        user.amount -= _amount;
        user.rewardDebt = (user.amount * pool.accTokenPerShare) / 1e12;

        IRewarder _rewarder = pool.rewarder;
        if (address(_rewarder) != address(0)) {
            _rewarder.onRewarded(caller, user.amount);
        }

        pool.weToken.safeTransfer(caller, _amount);

        emit Withdraw(caller, _pid, _amount);
    }

    function harvest(uint256 _pid) external override nonReentrant {
        updatePool(_pid);
        address caller = _msgSender();
        UserInfo storage user = userInfo[_pid][caller];
        PoolInfo memory pool = poolInfo[_pid];

        uint256 totalReward = (user.amount * pool.accTokenPerShare) / 1e12;
        uint256 pending = totalReward - user.rewardDebt;

        // Effects
        user.rewardDebt = totalReward;

        // Interactions
        reward.safeTransfer(caller, pending);

        IRewarder _rewarder = pool.rewarder;
        if (address(_rewarder) != address(0)) {
            _rewarder.onRewarded(caller, user.amount);
        }

        emit Harvest(caller, _pid, pending);
    }

    function emergencyWithdraw(uint256 _pid) external override nonReentrant {
        address caller = _msgSender();
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][caller];
        emit EmergencyWithdraw(caller, _pid, user.amount);
        uint256 amount = user.amount;
        user.amount = 0;
        user.rewardDebt = 0;
        IRewarder _rewarder = pool.rewarder;
        if (address(_rewarder) != address(0)) {
            _rewarder.onRewarded(caller, 0);
        }
        pool.weToken.safeTransfer(caller, amount);
    }

    /// @dev Rescue the specified funds when stuck happens
    /// @param stuckToken the stuck token address
    function inCaseTokenGotStuck(address stuckToken) external onlyOwner {
        require(stuckToken != address(0), "MCW: !address");
        require(!weTokenSet.contains(stuckToken), "MCW: !staked_token");
        if (stuckToken == ETH_PLACEHOLDER_ADDR) {
            TransferHelper.safeTransferETH(_msgSender(), address(this).balance);
        } else {
            uint256 amount = IERC20(stuckToken).balanceOf(address(this));
            TransferHelper.safeTransfer(stuckToken, _msgSender(), amount);
        }
    }
}

File 2 of 12 : TransferHelper.sol
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;

// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
    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))),
            'TransferHelper::safeApprove: approve failed'
        );
    }

    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))),
            'TransferHelper::safeTransfer: transfer failed'
        );
    }

    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))),
            'TransferHelper::transferFrom: transferFrom failed'
        );
    }

    function safeTransferETH(address to, uint256 value) internal {
        (bool success, ) = to.call{value: value}(new bytes(0));
        require(success, 'TransferHelper::safeTransferETH: ETH transfer failed');
    }
}

File 3 of 12 : IMasterChefReward.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.8.14;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./IRewarder.sol";

interface IMasterChefReward {
    event PoolAdded(uint256 poolId, uint256 allocPoint, IERC20 weToken, IRewarder rewarder);
    event PoolSet(uint256 poolId, uint256 allocPoint, IRewarder rewarder);
    event PoolUpdated(uint256 poolId, uint256 lastRewardBlock, uint256 supply, uint256 accTokenPerShare);
    event RewardPerBlockUpdated(uint256 rewardPerBlock);
    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event Harvest(address indexed user, uint256 indexed pid, uint256 amount);
    event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount);

    struct UserInfo {
        uint256 amount;
        uint256 rewardDebt;
    }

    struct PoolInfo {
        IERC20 weToken;
        uint256 allocPoint;
        uint256 lastRewardBlock;
        uint256 accTokenPerShare;
        IRewarder rewarder;
    }

    // System-level function
    function setRewardPerBlock(uint256 _rewardPerBlock) external;

    // Pool-related functions
    function poolLength() external view returns (uint256);

    function add(
        uint256 allocPoint,
        IERC20 weToken,
        IRewarder rewarder
    ) external;

    function set(
        uint256 pid,
        uint256 allocPoint,
        IRewarder rewarder
    ) external;

    function massUpdatePools() external;

    function updatePool(uint256 pid) external;

    // User-related functions
    function pendingReward(uint256 pid, address user)
        external
        view
        returns (uint256 pendingRewardAmount, uint256 pendingRewarderTokens);

    function deposit(uint256 pid, uint256 amount) external;

    function withdraw(uint256 pid, uint256 amount) external;

    function harvest(uint256 pid) external;

    function emergencyWithdraw(uint256 pid) external;

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

    function poolInfo(uint256 pid)
        external
        view
        returns (
            IERC20 weToken,
            uint256 allocPoint,
            uint256 lastRewardBlock,
            uint256 accTokenPerShare,
            IRewarder rewarder
        );
}

File 4 of 12 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/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() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        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 {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 5 of 12 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

File 6 of 12 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

File 7 of 12 : EnumerableSet.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/structs/EnumerableSet.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 *  Trying to delete such a structure from storage will likely result in data corruption, rendering the structure unusable.
 *  See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 *  In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an array of EnumerableSet.
 * ====
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastValue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastValue;
                // Update the index for the moved value
                set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        return _values(set._inner);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }
}

File 8 of 12 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 9 of 12 : IRewarder.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.8.14;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IRewarder {
    event OnRewarded(address indexed user, uint256 amount);
    event RewardRateUpdated(uint256 oldRate, uint256 newRate);

    struct UserInfo {
        uint256 amount;
        uint256 rewardDebt;
        uint256 unpaidRewards;
    }

    struct PoolInfo {
        uint256 accTokenPerShare;
        uint256 lastRewardBlock;
    }

    function onRewarded(address user, uint256 amount) external;

    function pendingTokens(address user) external view returns (uint256);
}

File 10 of 12 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @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 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) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

File 11 of 12 : draft-IERC20Permit.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

File 12 of 12 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 20000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"contract IERC20","name":"_reward","type":"address"},{"internalType":"uint256","name":"_rewardPerBlock","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"EmergencyWithdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Harvest","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"poolId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"allocPoint","type":"uint256"},{"indexed":false,"internalType":"contract IERC20","name":"weToken","type":"address"},{"indexed":false,"internalType":"contract IRewarder","name":"rewarder","type":"address"}],"name":"PoolAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"poolId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"allocPoint","type":"uint256"},{"indexed":false,"internalType":"contract IRewarder","name":"rewarder","type":"address"}],"name":"PoolSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"poolId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"lastRewardBlock","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"supply","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"accTokenPerShare","type":"uint256"}],"name":"PoolUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"rewardPerBlock","type":"uint256"}],"name":"RewardPerBlockUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[],"name":"ETH_PLACEHOLDER_ADDR","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_allocPoint","type":"uint256"},{"internalType":"contract IERC20","name":"_weToken","type":"address"},{"internalType":"contract IRewarder","name":"_rewarder","type":"address"}],"name":"add","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"}],"name":"emergencyWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"}],"name":"harvest","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"stuckToken","type":"address"}],"name":"inCaseTokenGotStuck","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"massUpdatePools","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"address","name":"_user","type":"address"}],"name":"pendingReward","outputs":[{"internalType":"uint256","name":"pendingRewardAmount","type":"uint256"},{"internalType":"uint256","name":"pendingRewarderTokens","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"poolInfo","outputs":[{"internalType":"contract IERC20","name":"weToken","type":"address"},{"internalType":"uint256","name":"allocPoint","type":"uint256"},{"internalType":"uint256","name":"lastRewardBlock","type":"uint256"},{"internalType":"uint256","name":"accTokenPerShare","type":"uint256"},{"internalType":"contract IRewarder","name":"rewarder","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"poolLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"reward","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardPerBlock","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_allocPoint","type":"uint256"},{"internalType":"contract IRewarder","name":"_rewarder","type":"address"}],"name":"set","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_rewardPerBlock","type":"uint256"}],"name":"setRewardPerBlock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalAllocPoint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"}],"name":"updatePool","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"name":"userInfo","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"rewardDebt","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000871f2f2ff935fd1ed867842ff2a7bfd051a5e527000000000000000000000000000000000000000000000000000009184e72a000

-----Decoded View---------------
Arg [0] : _reward (address): 0x871f2F2ff935FD1eD867842FF2a7bfD051A5E527
Arg [1] : _rewardPerBlock (uint256): 10000000000000

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000871f2f2ff935fd1ed867842ff2a7bfd051a5e527
Arg [1] : 000000000000000000000000000000000000000000000000000009184e72a000


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