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//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/*
This contract allows the sale of an "offering" token in exchange for a "payment"
token.
It let's investors buy tokens at a fixed price but depending on the amount of
interest investors will get a variable allocation size (also called batch auction).
The sale is configured with an target amount of payment token to raise and set
amount of offering tokens to sell. Investors can participate multiple times.
Once the sale ends, investors get to claim their tokens and possibly their
payment token refund (for the execess amount that wasn't used to purchase tokens).
*/

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "./interfaces/IVoters.sol";
import "./interfaces/IERC677Receiver.sol";

contract SaleBatch is IERC677Receiver, Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20;

    // Information of each user's participation
    struct UserInfo {
        // How many tokens the user has provided
        uint amount;
        // Wether this user has already claimed their refund, defaults to false
        bool claimedRefund;
        // Wether this user has already claimed their share of tokens, defaults to false
        bool claimedTokens;
    }

    // The raising token
    IERC20 public paymentToken;
    // The offering token
    IERC20 public offeringToken;
    // The time (unix seconds) when sale starts
    uint public startTime;
    // The time (unix security) when sale ends
    uint public endTime;
    // Total amount of raising tokens that need to be raised
    uint public raisingAmount;
    // Total amount of offeringToken that will be offered
    uint public offeringAmount;
    // Maximum a user can contribute
    uint public perUserCap;
    // Voting token minimum balance to participate
    uint public votingMinimum;
    // Voting token address
    IVoters public votingToken;
    // Voting token snapshot id to use for balances (optional)
    uint public votingSnapshotId;
    // Wether deposits are paused
    bool public paused;
    // Wether the sale is finalized
    bool public finalized;
    // Total amount of raising tokens that have already been raised
    uint public totalAmount;
    // User's participation info
    mapping(address => UserInfo) public userInfo;
    // Participants list
    address[] public addressList;

    event Deposit(address indexed user, uint amount);
    event HarvestRefund(address indexed user, uint amount);
    event HarvestTokens(address indexed user, uint amount);

    constructor(
        address _paymentToken,
        address _offeringToken,
        uint _startTime,
        uint _endTime,
        uint _offeringAmount,
        uint _raisingAmount,
        uint _perUserCap
    ) Ownable() {
        paymentToken = IERC20(_paymentToken);
        offeringToken = IERC20(_offeringToken);
        startTime = _startTime;
        endTime = _endTime;
        offeringAmount = _offeringAmount;
        raisingAmount = _raisingAmount;
        perUserCap = _perUserCap;
        require(_paymentToken != address(0) && _offeringToken != address(0), "!zero");
        require(_paymentToken != _offeringToken, "payment != offering");
        require(_offeringAmount > 0, "offering > 0");
        require(_raisingAmount > 0, "raising > 0");
        require(_startTime > block.timestamp, "start > now");
        require(_startTime < _endTime, "start < end");
        require(_startTime < 10000000000, "start time not unix");
        require(_endTime < 10000000000, "start time not unix");
    }

    function configureVotingToken(
        uint minimum,
        address token,
        uint snapshotId
    ) public onlyOwner {
        votingMinimum = minimum;
        votingToken = IVoters(token);
        votingSnapshotId = snapshotId;
    }

    function setRaisingAmount(uint amount) public onlyOwner {
      require(block.timestamp < startTime && totalAmount == 0, "sale started");
      raisingAmount = amount;
    }

    function togglePaused() public onlyOwner {
        paused = !paused;
    }

    function finalize() public {
        require(msg.sender == owner() || block.timestamp > endTime + 14 days, "not allowed");
        finalized = true;
    }

    function getAddressListLength() external view returns (uint) {
        return addressList.length;
    }

    function getParams() external view returns (uint, uint, uint, uint, uint, uint, bool, bool) {
        return (startTime, endTime, raisingAmount, offeringAmount, perUserCap, totalAmount, paused, finalized);
    }

    function getVotingParams() external view returns (uint, address, uint) {
        return (votingMinimum, address(votingToken), votingSnapshotId);
    }

    function _deposit(address user, uint amount) private nonReentrant {
        require(!paused, "paused");
        require(block.timestamp >= startTime && block.timestamp <= endTime, "sale not active");
        require(amount > 0, "need amount > 0");
        require(perUserCap == 0 || userInfo[user].amount + amount <= perUserCap, "over per user cap");

        if (votingMinimum > 0) {
            if (votingSnapshotId == 0) {
                require(votingToken.balanceOf(user) >= votingMinimum, "under minimum locked");
            } else {
                require(votingToken.balanceOfAt(user, votingSnapshotId) >= votingMinimum, "under minimum locked");
            }
        }

        if (userInfo[user].amount == 0) {
            addressList.push(address(user));
        }

        userInfo[user].amount = userInfo[user].amount + amount;
        totalAmount = totalAmount + amount;
        emit Deposit(user, amount);
    }

    function deposit(uint amount) public {
        _transferFrom(msg.sender, amount);
        _deposit(msg.sender, amount);
    }

    function onTokenTransfer(address user, uint amount, bytes calldata _data) public override {
        require(msg.sender == address(paymentToken), "onTokenTransfer: not paymentToken");
        _deposit(user, amount);
    }

    function harvestRefund() public nonReentrant {
        require(!paused, "paused");
        require(block.timestamp > endTime, "sale not ended");
        require(userInfo[msg.sender].amount > 0, "have you participated?");
        require(!userInfo[msg.sender].claimedRefund, "nothing to harvest");
        userInfo[msg.sender].claimedRefund = true;
        uint amount = getRefundingAmount(msg.sender);
        if (amount > 0) {
            paymentToken.safeTransfer(address(msg.sender), amount);
        }
        emit HarvestRefund(msg.sender, amount);
    }

    function harvestTokens() public nonReentrant {
        require(!paused, "paused");
        require(block.timestamp > endTime, "sale not ended");
        require(finalized, "not finalized");
        require(userInfo[msg.sender].amount > 0, "have you participated?");
        require(!userInfo[msg.sender].claimedTokens, "nothing to harvest");
        userInfo[msg.sender].claimedTokens = true;
        uint amount = getOfferingAmount(msg.sender);
        if (amount > 0) {
            offeringToken.safeTransfer(address(msg.sender), amount);
        }
        emit HarvestTokens(msg.sender, amount);
    }

    function harvestAll() public {
        harvestRefund();
        harvestTokens();
    }

    // Allocation in percent, 1 means 0.000001(0.0001%), 1000000 means 1(100%)
    function getUserAllocation(address _user) public view returns (uint) {
        return (userInfo[_user].amount * 1e12) / totalAmount / 1e6;
    }

    // Amount of offering token a user will receive
    function getOfferingAmount(address _user) public view returns (uint) {
        if (totalAmount > raisingAmount) {
            uint allocation = getUserAllocation(_user);
            return (offeringAmount * allocation) / 1e6;
        } else {
            return (userInfo[_user].amount * offeringAmount) / raisingAmount;
        }
    }

    // Amount of the offering token a user will be refunded
    function getRefundingAmount(address _user) public view returns (uint) {
        if (totalAmount <= raisingAmount) {
            return 0;
        }
        uint allocation = getUserAllocation(_user);
        uint payAmount = (raisingAmount * allocation) / 1e6;
        return userInfo[_user].amount - payAmount;
    }

    function withdrawToken(address token, uint amount) public onlyOwner {
        IERC20(token).safeTransfer(msg.sender, amount);
    }

    function _transferFrom(address from, uint amount) private {
        uint balanceBefore = paymentToken.balanceOf(address(this));
        paymentToken.safeTransferFrom(from, address(this), amount);
        uint balanceAfter = paymentToken.balanceOf(address(this));
        require(balanceAfter - balanceBefore == amount, "_transferFrom: balance change does not match amount");
    }
}

// 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: MIT

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 make 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;
    }
}

// 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 "../IERC20.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));
        }
    }

    /**
     * @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");
        }
    }
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IVoters {
  function snapshot() external returns (uint);
  function totalSupplyAt(uint snapshotId) external view returns (uint);
  function votesAt(address account, uint snapshotId) external view returns (uint);
  function balanceOf(address account) external view returns (uint);
  function balanceOfAt(address account, uint snapshotId) external view returns (uint);
  function donate(uint amount) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IERC677Receiver {
  function onTokenTransfer(address _sender, uint _value, bytes calldata _data) external;
}

// 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;

/**
 * @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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

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

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_paymentToken","type":"address"},{"internalType":"address","name":"_offeringToken","type":"address"},{"internalType":"uint256","name":"_startTime","type":"uint256"},{"internalType":"uint256","name":"_endTime","type":"uint256"},{"internalType":"uint256","name":"_offeringAmount","type":"uint256"},{"internalType":"uint256","name":"_raisingAmount","type":"uint256"},{"internalType":"uint256","name":"_perUserCap","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"HarvestRefund","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"HarvestTokens","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"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"addressList","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"minimum","type":"uint256"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"snapshotId","type":"uint256"}],"name":"configureVotingToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"endTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"finalize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"finalized","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAddressListLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"}],"name":"getOfferingAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getParams","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bool","name":"","type":"bool"},{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"}],"name":"getRefundingAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"}],"name":"getUserAllocation","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getVotingParams","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"harvestAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"harvestRefund","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"harvestTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"offeringAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"offeringToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"onTokenTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"paymentToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"perUserCap","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"raisingAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"setRaisingAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"startTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"togglePaused","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalAmount","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":"userInfo","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bool","name":"claimedRefund","type":"bool"},{"internalType":"bool","name":"claimedTokens","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"votingMinimum","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"votingSnapshotId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"votingToken","outputs":[{"internalType":"contract IVoters","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawToken","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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00000000000000000000000069fa0fee221ad11012bab0fdb45d444d3d2ce71c00000000000000000000000084d821f7fbdd595c4c4a50842913e6b1e07d7a53000000000000000000000000000000000000000000000000000000006140aae0000000000000000000000000000000000000000000000000000000006141fc600000000000000000000000000000000000000000000422ca8b0a00a42500000000000000000000000000000000000000000000000000d3c21bcecceda100000000000000000000000000000000000000000000000000d3c21bcecceda1000000

-----Decoded View---------------
Arg [0] : _paymentToken (address): 0x69fa0feE221AD11012BAb0FdB45d444D3D2Ce71c
Arg [1] : _offeringToken (address): 0x84d821F7FbDD595c4C4A50842913e6b1E07d7a53
Arg [2] : _startTime (uint256): 1631628000
Arg [3] : _endTime (uint256): 1631714400
Arg [4] : _offeringAmount (uint256): 5000000000000000000000000
Arg [5] : _raisingAmount (uint256): 1000000000000000000000000
Arg [6] : _perUserCap (uint256): 1000000000000000000000000

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 00000000000000000000000069fa0fee221ad11012bab0fdb45d444d3d2ce71c
Arg [1] : 00000000000000000000000084d821f7fbdd595c4c4a50842913e6b1e07d7a53
Arg [2] : 000000000000000000000000000000000000000000000000000000006140aae0
Arg [3] : 000000000000000000000000000000000000000000000000000000006141fc60
Arg [4] : 0000000000000000000000000000000000000000000422ca8b0a00a425000000
Arg [5] : 00000000000000000000000000000000000000000000d3c21bcecceda1000000
Arg [6] : 00000000000000000000000000000000000000000000d3c21bcecceda1000000