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BEP20RewardApe-to-BEP20RewardApeV2

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pragma solidity 0.6.12;

* ApeSwapFinance

* App: https://apeswap.finance

* Medium: https://ape-swap.medium.com

* Twitter: https://twitter.com/ape_swap

* Telegram: https://t.me/ape_swap

* Announcements: https://t.me/ape_swap_news

* GitHub: https://github.com/ApeSwapFinance

import '@pancakeswap/pancake-swap-lib/contracts/math/SafeMath.sol';

import '@pancakeswap/pancake-swap-lib/contracts/token/BEP20/IBEP20.sol';

import '@pancakeswap/pancake-swap-lib/contracts/token/BEP20/SafeBEP20.sol';

import '@pancakeswap/pancake-swap-lib/contracts/access/Ownable.sol';

contract BEP20RewardApe is Ownable {

contract BEP20RewardApeV2 is Ownable {

using SafeMath for uint256;

using SafeBEP20 for IBEP20;

// Info of each user.

struct UserInfo {

uint256 amount; // How many LP tokens the user has provided.

uint256 rewardDebt; // Reward debt. See explanation below.

}

// Info of each pool.

struct PoolInfo {

IBEP20 lpToken; // Address of LP token contract.

uint256 allocPoint; // How many allocation points assigned to this pool. Rewards to distribute per block.

uint256 lastRewardBlock; // Last block number that Rewards distribution occurs.

uint256 accRewardTokenPerShare; // Accumulated Rewards per share, times 1e12. See below.

}

// The stake token

IBEP20 public stakeToken;

// The reward token

IBEP20 public rewardToken;

// Reward tokens created per block.

uint256 public rewardPerBlock;

// Info of each pool.

PoolInfo[] public poolInfo;

// Info of each user that stakes LP tokens.

mapping (address => UserInfo) public userInfo;

// Total allocation poitns. Must be the sum of all allocation points in all pools.

uint256 private totalAllocPoint = 0;

// The block number when Reward mining starts.

uint256 public startBlock;

// The block number when mining ends.

uint256 public bonusEndBlock;

event Deposit(address indexed user, uint256 amount);

event DepositRewards(uint256 amount);

event Withdraw(address indexed user, uint256 amount);

event EmergencyWithdraw(address indexed user, uint256 amount);

event EmergencyRewardWithdraw(address indexed user, uint256 amount);

constructor(

IBEP20 _stakeToken,

IBEP20 _rewardToken,

uint256 _rewardPerBlock,

uint256 _startBlock,

uint256 _bonusEndBlock

) public {

stakeToken = _stakeToken;

rewardToken = _rewardToken;

rewardPerBlock = _rewardPerBlock;

startBlock = _startBlock;

bonusEndBlock = _bonusEndBlock;

// staking pool

poolInfo.push(PoolInfo({

lpToken: _stakeToken,

allocPoint: 1000,

lastRewardBlock: startBlock,

accRewardTokenPerShare: 0

}));

totalAllocPoint = 1000;

}

// Return reward multiplier over the given _from to _to block.

function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256) {

if (_to <= bonusEndBlock) {

return _to.sub(_from);

} else if (_from >= bonusEndBlock) {

return 0;

} else {

return bonusEndBlock.sub(_from);

}

// View function to see pending Reward on frontend.

function pendingReward(address _user) external view returns (uint256) {

PoolInfo storage pool = poolInfo[0];

UserInfo storage user = userInfo[_user];

uint256 accRewardTokenPerShare = pool.accRewardTokenPerShare;

uint256 lpSupply = pool.lpToken.balanceOf(address(this));

if (block.number > pool.lastRewardBlock && lpSupply != 0) {

uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);

uint256 tokenReward = multiplier.mul(rewardPerBlock).mul(pool.allocPoint).div(totalAllocPoint);

accRewardTokenPerShare = accRewardTokenPerShare.add(tokenReward.mul(1e12).div(lpSupply));

}

return user.amount.mul(accRewardTokenPerShare).div(1e12).sub(user.rewardDebt);

}

// Update reward variables of the given pool to be up-to-date.

function updatePool(uint256 _pid) public {

PoolInfo storage pool = poolInfo[_pid];

if (block.number <= pool.lastRewardBlock) {

return;

}

uint256 lpSupply = pool.lpToken.balanceOf(address(this));

if (lpSupply == 0) {

pool.lastRewardBlock = block.number;

return;

}

uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);

uint256 tokenReward = multiplier.mul(rewardPerBlock).mul(pool.allocPoint).div(totalAllocPoint);

pool.accRewardTokenPerShare = pool.accRewardTokenPerShare.add(tokenReward.mul(1e12).div(lpSupply));

pool.lastRewardBlock = block.number;

}

// Update reward variables for all pools. Be careful of gas spending!

function massUpdatePools() public {

uint256 length = poolInfo.length;

for (uint256 pid = 0; pid < length; ++pid) {

updatePool(pid);

}

/// Deposit staking token into the contract to earn rewards.

/// @dev Since this contract needs to be supplied with rewards we are

/// sending the balance of the contract if the pending rewards are higher

/// @param _amount The amount of staking tokens to deposit

function deposit(uint256 _amount) public {

PoolInfo storage pool = poolInfo[0];

UserInfo storage user = userInfo[msg.sender];

updatePool(0);

if (user.amount > 0) {

uint256 pending = user.amount.mul(pool.accRewardTokenPerShare).div(1e12).sub(user.rewardDebt);

if(pending > 0) {

uint256 currentRewardBalance = rewardBalance();

if(currentRewardBalance > 0) {

if(pending > currentRewardBalance) {

safeTransferReward(address(msg.sender), currentRewardBalance);

} else {

safeTransferReward(address(msg.sender), pending);

}

if(_amount > 0) {

pool.lpToken.safeTransferFrom(address(msg.sender), address(this), _amount);

user.amount = user.amount.add(_amount);

}

user.rewardDebt = user.amount.mul(pool.accRewardTokenPerShare).div(1e12);

emit Deposit(msg.sender, _amount);

}

/// Withdraw rewards and/or staked tokens. Pass a 0 amount to withdraw only rewards

/// @param _amount The amount of staking tokens to withdraw

function withdraw(uint256 _amount) public {

PoolInfo storage pool = poolInfo[0];

UserInfo storage user = userInfo[msg.sender];

require(user.amount >= _amount, "withdraw: not good");

updatePool(0);

uint256 pending = user.amount.mul(pool.accRewardTokenPerShare).div(1e12).sub(user.rewardDebt);

if(pending > 0) {

uint256 currentRewardBalance = rewardBalance();

if(currentRewardBalance > 0) {

if(pending > currentRewardBalance) {

safeTransferReward(address(msg.sender), currentRewardBalance);

} else {

safeTransferReward(address(msg.sender), pending);

}

if(_amount > 0) {

user.amount = user.amount.sub(_amount);

pool.lpToken.safeTransfer(address(msg.sender), _amount);

}

user.rewardDebt = user.amount.mul(pool.accRewardTokenPerShare).div(1e12);

emit Withdraw(msg.sender, _amount);

}

/// Obtain the reward balance of this contract

/// @return wei balace of conract

function rewardBalance() public view returns (uint256) {

return rewardToken.balanceOf(address(this));

}

// Deposit Rewards into contract

function depositRewards(uint256 _amount) external {

require(_amount > 0, 'Deposit value must be greater than 0.');

rewardToken.safeTransferFrom(address(msg.sender), address(this), _amount);

emit DepositRewards(_amount);

}

/// @param _to address to send reward token to

/// @param _amount value of reward token to transfer

function safeTransferReward(address _to, uint256 _amount) internal {

rewardToken.safeTransfer(_to, _amount);

}

/* Admin Functions */

/// @param _rewardPerBlock The amount of reward tokens to be given per block

function setRewardPerBlock(uint256 _rewardPerBlock) external onlyOwner {

rewardPerBlock = _rewardPerBlock;

}

/// @param _bonusEndBlock The block when rewards will end

function setBonusEndBlock(uint256 _bonusEndBlock) external onlyOwner {

require(_bonusEndBlock > bonusEndBlock, 'new bonus end block must be greater than current');

bonusEndBlock = _bonusEndBlock;

}

/* Emergency Functions */

// Withdraw without caring about rewards. EMERGENCY ONLY.

function emergencyWithdraw() external {

PoolInfo storage pool = poolInfo[0];

UserInfo storage user = userInfo[msg.sender];

pool.lpToken.safeTransfer(address(msg.sender), user.amount);

user.amount = 0;

user.rewardDebt = 0;

emit EmergencyWithdraw(msg.sender, user.amount);

}

// Withdraw reward. EMERGENCY ONLY.

function emergencyRewardWithdraw(uint256 _amount) external onlyOwner {

require(_amount <= rewardBalance(), 'not enough rewards');

// Withdraw rewards

safeTransferReward(address(msg.sender), _amount);

emit EmergencyRewardWithdraw(msg.sender, _amount);

}

Différences enregistrées

Texte d'origine

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pragma solidity 0.6.12;

/*
 * ApeSwapFinance 
 * App:             https://apeswap.finance
 * Medium:          https://ape-swap.medium.com    
 * Twitter:         https://twitter.com/ape_swap 
 * Telegram:        https://t.me/ape_swap
 * Announcements:   https://t.me/ape_swap_news
 * GitHub:          https://github.com/ApeSwapFinance
 */

import '@pancakeswap/pancake-swap-lib/contracts/math/SafeMath.sol';
import '@pancakeswap/pancake-swap-lib/contracts/token/BEP20/IBEP20.sol';
import '@pancakeswap/pancake-swap-lib/contracts/token/BEP20/SafeBEP20.sol';
import '@pancakeswap/pancake-swap-lib/contracts/access/Ownable.sol';

contract BEP20RewardApe is Ownable {
    using SafeMath for uint256;
    using SafeBEP20 for IBEP20;

// Info of each user.
    struct UserInfo {
        uint256 amount;     // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
    }

// Info of each pool.
    struct PoolInfo {
        IBEP20 lpToken;           // Address of LP token contract.
        uint256 allocPoint;       // How many allocation points assigned to this pool. Rewards to distribute per block.
        uint256 lastRewardBlock;  // Last block number that Rewards distribution occurs.
        uint256 accRewardTokenPerShare; // Accumulated Rewards per share, times 1e12. See below.
    }

// The stake token
    IBEP20 public stakeToken;
    // The reward token
    IBEP20 public rewardToken;

// Reward tokens created per block.
    uint256 public rewardPerBlock;

// Info of each pool.
    PoolInfo[] public poolInfo;
    // Info of each user that stakes LP tokens.
    mapping (address => UserInfo) public userInfo;
    // Total allocation poitns. Must be the sum of all allocation points in all pools.
    uint256 private totalAllocPoint = 0;
    // The block number when Reward mining starts.
    uint256 public startBlock;
	// The block number when mining ends.	
    uint256 public bonusEndBlock;

event Deposit(address indexed user, uint256 amount);
    event DepositRewards(uint256 amount);
    event Withdraw(address indexed user, uint256 amount);
    event EmergencyWithdraw(address indexed user, uint256 amount);
    event EmergencyRewardWithdraw(address indexed user, uint256 amount);

constructor(
        IBEP20 _stakeToken,
        IBEP20 _rewardToken,
        uint256 _rewardPerBlock,
        uint256 _startBlock,
        uint256 _bonusEndBlock
    ) public {
        stakeToken = _stakeToken;
        rewardToken = _rewardToken;
        rewardPerBlock = _rewardPerBlock;
        startBlock = _startBlock;
        bonusEndBlock = _bonusEndBlock;

// staking pool
        poolInfo.push(PoolInfo({
            lpToken: _stakeToken,
            allocPoint: 1000,
            lastRewardBlock: startBlock,
            accRewardTokenPerShare: 0
        }));

totalAllocPoint = 1000;

}

// Return reward multiplier over the given _from to _to block.
    function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256) {
        if (_to <= bonusEndBlock) {
            return _to.sub(_from);
        } else if (_from >= bonusEndBlock) {
            return 0;
        } else {
            return bonusEndBlock.sub(_from);
        }
    }

// View function to see pending Reward on frontend.
    function pendingReward(address _user) external view returns (uint256) {
        PoolInfo storage pool = poolInfo[0];
        UserInfo storage user = userInfo[_user];
        uint256 accRewardTokenPerShare = pool.accRewardTokenPerShare;
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (block.number > pool.lastRewardBlock && lpSupply != 0) {
            uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
            uint256 tokenReward = multiplier.mul(rewardPerBlock).mul(pool.allocPoint).div(totalAllocPoint);
            accRewardTokenPerShare = accRewardTokenPerShare.add(tokenReward.mul(1e12).div(lpSupply));
        }
        return user.amount.mul(accRewardTokenPerShare).div(1e12).sub(user.rewardDebt);
    }

// Update reward variables of the given pool to be up-to-date.
    function updatePool(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        if (block.number <= pool.lastRewardBlock) {
            return;
        }
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (lpSupply == 0) {
            pool.lastRewardBlock = block.number;
            return;
        }
        uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
        uint256 tokenReward = multiplier.mul(rewardPerBlock).mul(pool.allocPoint).div(totalAllocPoint);
        pool.accRewardTokenPerShare = pool.accRewardTokenPerShare.add(tokenReward.mul(1e12).div(lpSupply));
        pool.lastRewardBlock = block.number;
    }

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

/// Deposit staking token into the contract to earn rewards. 
    /// @dev Since this contract needs to be supplied with rewards we are 
    ///  sending the balance of the contract if the pending rewards are higher
    /// @param _amount The amount of staking tokens to deposit
    function deposit(uint256 _amount) public {
        PoolInfo storage pool = poolInfo[0];
        UserInfo storage user = userInfo[msg.sender];
        updatePool(0);
        if (user.amount > 0) {
            uint256 pending = user.amount.mul(pool.accRewardTokenPerShare).div(1e12).sub(user.rewardDebt);
            if(pending > 0) {
                uint256 currentRewardBalance = rewardBalance();
                if(currentRewardBalance > 0) {
                    if(pending > currentRewardBalance) {
                        safeTransferReward(address(msg.sender), currentRewardBalance);
                    } else {
                        safeTransferReward(address(msg.sender), pending);
                    }
                }
            }
        }
        if(_amount > 0) {
            pool.lpToken.safeTransferFrom(address(msg.sender), address(this), _amount);
            user.amount = user.amount.add(_amount);
        }
        user.rewardDebt = user.amount.mul(pool.accRewardTokenPerShare).div(1e12);

emit Deposit(msg.sender, _amount);
    }

/// Withdraw rewards and/or staked tokens. Pass a 0 amount to withdraw only rewards 
    /// @param _amount The amount of staking tokens to withdraw
    function withdraw(uint256 _amount) public {
        PoolInfo storage pool = poolInfo[0];
        UserInfo storage user = userInfo[msg.sender];
        require(user.amount >= _amount, "withdraw: not good");
        updatePool(0);
        uint256 pending = user.amount.mul(pool.accRewardTokenPerShare).div(1e12).sub(user.rewardDebt);
        if(pending > 0) {
            uint256 currentRewardBalance = rewardBalance();
            if(currentRewardBalance > 0) {
                if(pending > currentRewardBalance) {
                    safeTransferReward(address(msg.sender), currentRewardBalance);
                } else {
                    safeTransferReward(address(msg.sender), pending);
                }
            }
        }
        if(_amount > 0) {
            user.amount = user.amount.sub(_amount);
            pool.lpToken.safeTransfer(address(msg.sender), _amount);
        }

user.rewardDebt = user.amount.mul(pool.accRewardTokenPerShare).div(1e12);

emit Withdraw(msg.sender, _amount);
    }

/// Obtain the reward balance of this contract
    /// @return wei balace of conract
    function rewardBalance() public view returns (uint256) {
        return rewardToken.balanceOf(address(this));
    }

// Deposit Rewards into contract
    function depositRewards(uint256 _amount) external {
        require(_amount > 0, 'Deposit value must be greater than 0.');
        rewardToken.safeTransferFrom(address(msg.sender), address(this), _amount);
        emit DepositRewards(_amount);
    }

/// @param _to address to send reward token to
    /// @param _amount value of reward token to transfer
    function safeTransferReward(address _to, uint256 _amount) internal {
        rewardToken.safeTransfer(_to, _amount);
    }

/* Emergency Functions */

// Withdraw without caring about rewards. EMERGENCY ONLY.
    function emergencyWithdraw() external {
        PoolInfo storage pool = poolInfo[0];
        UserInfo storage user = userInfo[msg.sender];
        pool.lpToken.safeTransfer(address(msg.sender), user.amount);
        user.amount = 0;
        user.rewardDebt = 0;
        emit EmergencyWithdraw(msg.sender, user.amount);
    }

// Withdraw reward. EMERGENCY ONLY.
    function emergencyRewardWithdraw(uint256 _amount) external onlyOwner {
        require(_amount <= rewardBalance(), 'not enough rewards');
        // Withdraw rewards
        safeTransferReward(address(msg.sender), _amount);
        emit EmergencyRewardWithdraw(msg.sender, _amount);
    }

}

Texte modifié

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pragma solidity 0.6.12;

contract BEP20RewardApeV2 is Ownable {
    using SafeMath for uint256;
    using SafeBEP20 for IBEP20;

// Info of each user.
    struct UserInfo {
        uint256 amount;     // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
    }

// The stake token
    IBEP20 public stakeToken;
    // The reward token
    IBEP20 public rewardToken;

// Reward tokens created per block.
    uint256 public rewardPerBlock;

totalAllocPoint = 1000;

}

emit Deposit(msg.sender, _amount);
    }

user.rewardDebt = user.amount.mul(pool.accRewardTokenPerShare).div(1e12);

emit Withdraw(msg.sender, _amount);
    }

/* Admin Functions */

/// @param _rewardPerBlock The amount of reward tokens to be given per block
    function setRewardPerBlock(uint256 _rewardPerBlock) external onlyOwner {
        rewardPerBlock = _rewardPerBlock;
    }
    
    /// @param  _bonusEndBlock The block when rewards will end
    function setBonusEndBlock(uint256 _bonusEndBlock) external onlyOwner {
        require(_bonusEndBlock > bonusEndBlock, 'new bonus end block must be greater than current');
        bonusEndBlock = _bonusEndBlock;
    }

/* Emergency Functions */

}