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//SPDX-License-Identifier: Unlicense
pragma solidity 0.8.4;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./FormToken.sol";
import "./LPToken.sol";

contract LPFarming is Ownable {

    // base APR
    uint256 public BASE_APR;
    uint256 public MULTIPLIER;
    uint256 public FEE = 3;
    uint256 private FEE_BALANCE = 0;
    address private FEE_TO;
    address private FEE_TO_SETTER;
    uint256 private ONE_YEAR = 31536000;
    uint256 private ONE_ETH = 1000000000000000000;
    // user's staking balance
    mapping(address => uint256) public stakingBalanceReward;
    // user's staking balance
    mapping(address => uint256) public stakingBalanceLp;
    // staking start timestamp
    mapping(address => uint256) public startTime;  
    // user's yield to claim
    mapping(address => uint256) public yieldBalance;
    // user's index
    mapping(address => uint256) public trenchIndex;
    // Trenches
    uint256[2][] public trenches;
    // Staking and rewards token interface
    LPToken public lpToken;
    FormToken public formToken;

    // contract's events
    event Stake(address indexed from, uint256 amount);
    event Unstake(address indexed from, uint256 amount);
    event YieldWithdraw(address indexed to, uint256 amount);
    event FeeWithdraw(address indexed to, uint256 amount);

    constructor(
        FormToken _formToken,
        LPToken _lpToken,
        uint256 initialAPR,
        uint256 initialMultiplier,
        address _feeToSetter
        ) {
        formToken = _formToken;
        lpToken = _lpToken;
        BASE_APR = initialAPR;
        MULTIPLIER = initialMultiplier;
        FEE_TO_SETTER = _feeToSetter;
        FEE_TO = _feeToSetter;
        trenches.push([block.timestamp, BASE_APR*MULTIPLIER]);
    }

    /// APR and multiplier calculations
    function getAPRValue() external view returns(uint256) {
        return BASE_APR*MULTIPLIER;
    }
    function setMultiplier(uint256 newMultiplier) onlyOwner external {
        MULTIPLIER = newMultiplier;
        trenches.push([block.timestamp, BASE_APR*MULTIPLIER]);
    }
    function setFee(uint256 newFee) onlyOwner external {
        FEE = newFee;
    }
    function sendFeeTo(address feeTo) external {
        require(msg.sender == FEE_TO_SETTER, 'FORBIDDEN');
        FEE_TO = feeTo;
    }
    function setFeeToSetter(address newSetter) external {
        require(msg.sender == FEE_TO_SETTER, 'FORBIDDEN');
        FEE_TO_SETTER = newSetter;
    }
    function getFee() external view returns(uint256) {
        return FEE_BALANCE;
    }
    function getStakingBalance(uint256 amount) private view returns(uint256) {
        uint256 LPSupply = lpToken.totalSupply();
        uint256 FORMSupply = formToken.balanceOf(address(lpToken));
        uint256 formStakingBalance = FORMSupply * 2 * ((amount * ONE_ETH) / LPSupply);
        return formStakingBalance / ONE_ETH;
    }

    /// Yield calculations
    function _calculateYield(address user) private view returns(uint256) {
        // end means now
        uint256 end = block.timestamp;
        uint256 totalYield;
        // loop through trenches
        for(uint256 i = trenchIndex[user]; i < trenches.length; i++){
            // how long the user was staking during the trench
            uint256 stakingTimeWithinTier;
            // if comparing to the last trench then
            // check how long user was staking during that trench
            if (i + 1 == trenches.length) {
                if (startTime[user] > trenches[i][0]) {
                    stakingTimeWithinTier = end - startTime[user];
                } else {
                    stakingTimeWithinTier = end - trenches[i][0];
                    // if no at all, then work is done
                    if (stakingTimeWithinTier < 0) {
                        continue;
                    }
                }
            } else {
                // check if user was staking during that trench
                // if no skip to another trench
                if (startTime[user] >= trenches[i + 1][0]) {
                    continue;
                } else {
                    // check if user was staking during the entire trench or partially
                    uint256 stakingTimeRelative = trenches[i + 1][0] - startTime[user];
                    uint256 tierTime = trenches[i + 1][0] - trenches[i][0];
                    // that means entire timespan (even more)
                    if (stakingTimeRelative >= tierTime) {
                        stakingTimeWithinTier = tierTime;
                    } else {
                        // that means partially
                        stakingTimeWithinTier = stakingTimeRelative;
                    }
                }
            }
            // calculate yield earned during the trench
            uint256 yieldEarnedWithinTier = (((trenches[i][1] * ONE_ETH) / ONE_YEAR) * stakingTimeWithinTier) / 100;
            uint256 netYield = stakingBalanceReward[user] * yieldEarnedWithinTier;
            uint256 netYieldFormatted = netYield / ONE_ETH;
            // add to total yield (from all trenches eventually)
            totalYield += netYieldFormatted;
        }
        return totalYield;
    }

    function getUsersYieldAmount(address user) public view returns(uint256) {
        require(
            stakingBalanceLp[user] > 0,
            "You do not stake any tokens");
        uint256 yieldEarned = _calculateYield(user);
        uint256 yieldUpToDate = yieldBalance[msg.sender];
        uint256 yieldTotal = yieldEarned + yieldUpToDate;
        return yieldTotal;
    }

    /// Core functions
    function stake(uint256 amount) external {
        // amount to stake and user's balance can not be 0
        require(
            amount > 0 &&
            lpToken.balanceOf(msg.sender) >= amount, 
            "You cannot stake zero tokens");
        
        // if user is already staking, calculate up-to-date yield
        if(stakingBalanceLp[msg.sender] > 0){
            uint256 yieldEarned = getUsersYieldAmount(msg.sender);
            yieldBalance[msg.sender] = yieldEarned;
        }

        lpToken.transferFrom(msg.sender, address(this), amount); // add LP tokens to the staking pool
        stakingBalanceLp[msg.sender] += amount;
        uint256 stakingFORMBalance = getStakingBalance(amount);
        stakingBalanceReward[msg.sender] += stakingFORMBalance;
        startTime[msg.sender] = block.timestamp; // upserting the staking schedule whether user is already staking or not
        trenchIndex[msg.sender] = trenches.length - 1;
        emit Stake(msg.sender, amount);
    }

    function unstake(uint256 amount) external {
        require(
            stakingBalanceLp[msg.sender] >= amount, 
            "Nothing to unstake"
        );

        uint256 lpFeeValue = amount * FEE / 1000;
        uint256 lpTransferValue = amount - lpFeeValue;
        uint256 formTransferValue = getUsersYieldAmount(msg.sender);

        lpToken.transfer(msg.sender, lpTransferValue); // transfer LP tokens
        formToken.transfer(msg.sender, formTransferValue); // transfer FORM tokens
        yieldBalance[msg.sender] = 0;
        FEE_BALANCE += lpFeeValue;
        startTime[msg.sender] = block.timestamp;
        stakingBalanceLp[msg.sender] -= amount;
        uint256 stakingFORMBalance = getStakingBalance(amount);
        stakingBalanceReward[msg.sender] -= stakingFORMBalance;
        trenchIndex[msg.sender] = trenches.length - 1;

        emit Unstake(msg.sender, amount);
    }
    
    function withdrawYield() external {
        uint256 yieldEarned = getUsersYieldAmount(msg.sender);
        require(yieldEarned > 0, "Nothing to withdraw");

        uint256 transferValue = yieldEarned;

        formToken.transfer(msg.sender, transferValue);

        startTime[msg.sender] = block.timestamp;
        yieldBalance[msg.sender] = 0;
        trenchIndex[msg.sender] = trenches.length - 1;

        emit YieldWithdraw(msg.sender, transferValue);
    }

    function withdrawFee() external {
        require(FEE_BALANCE > 0, "Nothing to withdraw");
        require(msg.sender == FEE_TO, 'FORBIDDEN');
        uint256 transferValue = FEE_BALANCE;
        lpToken.transfer(msg.sender, transferValue);
        FEE_BALANCE = 0;
        emit FeeWithdraw(msg.sender, transferValue);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @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);
}

// SPDX-License-Identifier: MIT

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() {
        _setOwner(_msgSender());
    }

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

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

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

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

//SPDX-License-Identifier: Unlicense
pragma solidity 0.8.4;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract FormToken is ERC20, Ownable {

    constructor() ERC20("FormToken", "FORM") {}

    function mint(address to, uint256 amount) public onlyOwner {
        _mint(to, amount);
    }

    function _transferOwnership(address newOwner) public onlyOwner {
        transferOwnership(newOwner);
    }
}

//SPDX-License-Identifier: Unlicense
pragma solidity 0.8.4;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract LPToken is ERC20, Ownable {

    constructor() ERC20("FORM-LP", "FORM-LP") {}

    function mint(address to, uint256 amount) public onlyOwner {
        _mint(to, amount);
    }

    function _transferOwnership(address newOwner) public onlyOwner {
        transferOwnership(newOwner);
    }
}

// SPDX-License-Identifier: MIT

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;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

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

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"contract FormToken","name":"_formToken","type":"address"},{"internalType":"contract LPToken","name":"_lpToken","type":"address"},{"internalType":"uint256","name":"initialAPR","type":"uint256"},{"internalType":"uint256","name":"initialMultiplier","type":"uint256"},{"internalType":"address","name":"_feeToSetter","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"FeeWithdraw","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":true,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Stake","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Unstake","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"YieldWithdraw","type":"event"},{"inputs":[],"name":"BASE_APR","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"FEE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MULTIPLIER","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"formToken","outputs":[{"internalType":"contract FormToken","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAPRValue","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"getUsersYieldAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lpToken","outputs":[{"internalType":"contract LPToken","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"feeTo","type":"address"}],"name":"sendFeeTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newFee","type":"uint256"}],"name":"setFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newSetter","type":"address"}],"name":"setFeeToSetter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newMultiplier","type":"uint256"}],"name":"setMultiplier","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"stakingBalanceLp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"stakingBalanceReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"startTime","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":"address","name":"","type":"address"}],"name":"trenchIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"trenches","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"unstake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawYield","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"yieldBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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00000000000000000000000021381e026ad6d8266244f2a583b35f9e4413fa2a000000000000000000000000b058b2612d4cd6e548438b10cb57371bbae133280000000000000000000000000000000000000000000000000000000000000005000000000000000000000000000000000000000000000000000000000000005400000000000000000000000098a8f350853a1451d7e961480c1fbfdac39f8efc

-----Decoded View---------------
Arg [0] : _formToken (address): 0x21381e026Ad6d8266244f2A583b35F9E4413FA2a
Arg [1] : _lpToken (address): 0xB058b2612d4cd6e548438b10Cb57371BBaE13328
Arg [2] : initialAPR (uint256): 5
Arg [3] : initialMultiplier (uint256): 84
Arg [4] : _feeToSetter (address): 0x98A8F350853a1451D7E961480c1fBfdaC39F8efC

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 00000000000000000000000021381e026ad6d8266244f2a583b35f9e4413fa2a
Arg [1] : 000000000000000000000000b058b2612d4cd6e548438b10cb57371bbae13328
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000005
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000054
Arg [4] : 00000000000000000000000098a8f350853a1451d7e961480c1fbfdac39f8efc