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// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import { SafeERC20, IERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { EnumerableSet } from "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";

contract PictoTokenSale is Ownable {
    using SafeERC20 for IERC20;
    using EnumerableSet for EnumerableSet.AddressSet;

    struct PaymentToken {
        address tokenAddress;
        uint256 price; //price of one pictoToken
        uint256 minPurchasedAmount;
    }

    struct ReferralInfo {
        address user;
        uint256 purchasedAmount;
    }

    struct UserInfo {
        address referrer;
        uint256 totalPurchasedAmount;
        uint256 totalWithdrawnAmount;
    }
    struct Purchase {
        address paymentToken;
        uint256 timestamp;
        uint256 pictoTokenAmount;
        uint256 payableAmount;
    }

    uint256 public constant FIRST_UNLOCK_BP = 1500; //15%
    uint256 public constant PURCHASE_PERIOD = 7593990 seconds;
    uint256 public constant VESTING_PERIOD = 180 days;
    uint256 public constant UNLOCK_PERIOD = 365 days;
    uint256 public constant BP = 10000;
    uint256 public constant BONUS = 500; //5%
    uint8 public constant pictoTokenDecimals = 18;
    address public immutable pictoToken;
    uint256 public totalLockedAmount;
    uint256 public referrerFeeBps = 1500; //15%
    uint256 public endOfSale;
    uint256 public startUnlock;

    PaymentToken[] public paymentTokens;
    // user => Purchase[]
    mapping(address => Purchase[]) public purchases;
    mapping(address => bool) public isPaymentToken;
    mapping(address => UserInfo) public userInfo;
    mapping(address => address[]) public referrals;
    //  user => token => fee
    mapping(address => mapping(address => uint256)) public referralsFee;
    mapping(address => uint256) public totalReferralsFeeInfo;
    mapping(address => bool) public whitelisted;
    EnumerableSet.AddressSet private users;
    EnumerableSet.AddressSet private whitelistedReferrer;

    modifier correctID(uint256 _id) {
        require(_id < paymentTokens.length, "bad token id");
        _;
    }

    event BuyPictoTokens(address user, uint256 pictoTokenAmount, uint256 paymentAmount);
    event AddPaymentToken(address tokenAddress, uint256 price, uint256 minPurchasedAmount);
    event RemovePaymentToken(address tokenAddress);
    event ChangePaymentToken(address tokenAddress, uint256 price, uint256 minPurchasedAmount);
    event ChangeReferrerFee(uint256 referrerFeeBps);
    event WithdrawTokens(address user, uint256 amount);

    constructor(address _pictoToken, PaymentToken[] memory _paymentTokens) {
        pictoToken = _pictoToken;
        for (uint256 i; i < _paymentTokens.length; i++) {
            paymentTokens.push(_paymentTokens[i]);
            isPaymentToken[_paymentTokens[i].tokenAddress] = true;
        }
        endOfSale = block.timestamp + PURCHASE_PERIOD;
        startUnlock = endOfSale + VESTING_PERIOD;
    }

    function isSaleTime() public view returns (bool) {
        return endOfSale > block.timestamp;
    }

    function setEndOfSale(uint256 _endOfSale) external onlyOwner {
        require(isSaleTime(), "sale is over");
        require(_endOfSale > block.timestamp, "incorrect _endOfSale");
        endOfSale = _endOfSale;
    }

    function WhitelistReferrer(address _referrer, bool _status) external onlyOwner {
        whitelisted[_referrer] = _status;
        if (_status) {
            whitelistedReferrer.add(_referrer);
        } else {
            whitelistedReferrer.remove(_referrer);
        }
    }

    function addPaymentToken(PaymentToken calldata _paymentToken) external onlyOwner {
        require(isPaymentToken[_paymentToken.tokenAddress] == false, "token already exist");
        isPaymentToken[_paymentToken.tokenAddress] = true;
        paymentTokens.push(_paymentToken);
        emit AddPaymentToken(
            _paymentToken.tokenAddress,
            _paymentToken.price,
            _paymentToken.minPurchasedAmount
        );
    }

    function removePaymentToken(
        uint256 _paymentTokenID
    ) external onlyOwner correctID(_paymentTokenID) {
        address tokenAddress = paymentTokens[_paymentTokenID].tokenAddress;
        paymentTokens[_paymentTokenID] = paymentTokens[paymentTokens.length - 1];
        paymentTokens.pop();
        isPaymentToken[tokenAddress] = false;
        emit RemovePaymentToken(tokenAddress);
    }

    function changePaymentToken(
        uint256 _paymentTokenID,
        uint256 _price,
        uint256 _minPurchasedAmount
    ) external onlyOwner correctID(_paymentTokenID) {
        PaymentToken storage paymentInfo = paymentTokens[_paymentTokenID];
        paymentInfo.price = _price;
        paymentInfo.minPurchasedAmount = _minPurchasedAmount;
        emit ChangePaymentToken(paymentInfo.tokenAddress, _price, _minPurchasedAmount);
    }

    function changeReferrerFee(uint256 _referrerFeeBps) external onlyOwner {
        require(_referrerFeeBps <= BP, "incorrect _referrerFeeBps");
        referrerFeeBps = _referrerFeeBps;
        emit ChangeReferrerFee(_referrerFeeBps);
    }

    function withdrawPictoTokens(address _token, uint256 _amount, address _to) external onlyOwner {
        require(_amount <= availablePictoTokens(), "_amount exceeds free balance");
        _pay(_token, address(this), _to, _amount);
    }

    function availablePictoTokens() public view returns (uint256) {
        return IERC20(pictoToken).balanceOf(address(this)) - totalLockedAmount;
    }

    function totalUsers() external view returns (uint256) {
        return users.length();
    }

    function userAtIndex(uint256 _index) external view returns (address) {
        return users.at(_index);
    }

    function userExists(address _user) external view returns (bool) {
        return users.contains(_user);
    }

    function getUsers() external view returns (address[] memory _users) {
        _users = users.values();
    }

    function getWhitelistedReferrer()
        external
        view
        returns (address[] memory _whitelistedReferrer)
    {
        _whitelistedReferrer = whitelistedReferrer.values();
    }

    function getUsersPurchases(address _user) external view returns (Purchase[] memory) {
        return purchases[_user];
    }

    function getUsersInfoInRange(
        uint256 _start,
        uint256 _end
    ) external view returns (UserInfo[] memory info) {
        require(_start < _end, "incorrect range");
        require(_end <= users.length(), "incorrect range");
        info = new UserInfo[](_end - _start);
        for (uint256 i = _start; i < _end; i++) {
            info[i - _start] = userInfo[users.at(i)];
        }
    }

    /// @notice This function provides the balance of referral fees for the specified tokens.
    /// @dev Fetches referral fee balances from the `referralsFee` mapping for the caller's address.
    /// @param tokens An array of token addresses for which to retrieve the referral fee balances.
    /// @return balances An array of uint256 values, each representing the referral fee balance of the corresponding token in the input array.
    function getReferralFeeBalance(
        address[] calldata tokens
    ) external view returns (uint256[] memory balances) {
        mapping(address => uint256) storage fee = referralsFee[msg.sender];
        balances = new uint256[](tokens.length);

        for (uint256 i = 0; i < tokens.length; i++) {
            balances[i] = fee[tokens[i]];
        }
    }

    /// @notice Retrieves information about the referrals associated with a given referrer.
    /// @dev Iterates over the array of a specified referrer's referrals to calculate the total purchased amount and aggregates respective data into ReferralInfo structs.
    /// @param referrer The address of the referrer whose referral information is being queried.
    /// @return totalFeeInPictoToken The sum of all referral fees for the referrer in PictoToken.
    /// @return totalPurchasedAmount The total amount of purchases made by all referrals linked to the referrer.
    /// @return referralsInfo An array of ReferralInfo structs containing detailed information on each referral linked to the referrer.
    function getReferralsInfo(
        address referrer
    )
        external
        view
        returns (
            uint256 totalFeeInPictoToken,
            uint256 totalPurchasedAmount,
            ReferralInfo[] memory referralsInfo
        )
    {
        address[] memory allReferrals = referrals[referrer];
        referralsInfo = new ReferralInfo[](allReferrals.length);
        for (uint256 i = 0; i < allReferrals.length; i++) {
            address user = allReferrals[i];
            uint256 userPurchasedAmount = userInfo[user].totalPurchasedAmount;
            referralsInfo[i] = ReferralInfo(user, userPurchasedAmount);
            totalPurchasedAmount += userPurchasedAmount;
        }
        totalFeeInPictoToken = totalReferralsFeeInfo[referrer];
    }

    /// @notice Calculates the amount of Picto tokens that have been unlocked for a given user.
    /// @dev The calculation is based on the vesting period and the time elapsed since the end of the sale.
    ///      Returns 0 if the sale is still ongoing.
    /// @param _user The address of the user whose unlocked amount is to be calculated.
    /// @return unlockedAmount The amount of unlocked Picto tokens available for `_user`.
    /// @custom:algorithm The unlocked amount is calculated as the total purchased amount
    ///                   proportionate to the time passed since the end of the sale,
    ///                   capped at the total purchased amount, and subtracting the amount already withdrawn.
    function calculateUnlockedAmount(address _user) public view returns (uint256 unlockedAmount) {
        UserInfo memory user = userInfo[_user];

        uint256 firstUnlockAmt = (user.totalPurchasedAmount * FIRST_UNLOCK_BP) / BP;

        uint256 totalUnlocked = firstUnlockAmt + block.timestamp > startUnlock
            ? ((user.totalPurchasedAmount - firstUnlockAmt) * (block.timestamp - startUnlock)) /
                UNLOCK_PERIOD
            : 0;
        if (totalUnlocked > user.totalPurchasedAmount) {
            totalUnlocked = user.totalPurchasedAmount;
        }
        if (totalUnlocked > user.totalWithdrawnAmount) {
            unlockedAmount = totalUnlocked - user.totalWithdrawnAmount;
        }
    }

    /// @notice Buys Picto tokens with a specified payment token
    /// @dev Requires the sale to be active and enforces minimum purchase requirements
    /// @param _paymentTokenID The identifier of the payment token being used for the purchase
    /// @param _pictoTokenAmount The amount of Picto tokens the user wishes to buy
    /// @param _referrer The address of the referrer, if applicable
    /// @custom:modifier correctID Ensures the payment token ID is valid
    function buyPictoTokens(
        uint256 _paymentTokenID,
        uint256 _pictoTokenAmount,
        address _referrer
    ) external correctID(_paymentTokenID) {
        require(isSaleTime(), "sale is over");
        PaymentToken memory paymentInfo = paymentTokens[_paymentTokenID];

        require(
            _pictoTokenAmount > paymentInfo.minPurchasedAmount,
            "_pictoTokenAmount is too small"
        );

        uint256 ptWithBonus = (_pictoTokenAmount * (BP + BONUS)) / BP;
        require((ptWithBonus) <= availablePictoTokens(), "_pictoTokenAmount exceeds free balance");

        UserInfo storage user = userInfo[msg.sender];

        if (user.referrer == address(0)) {
            require(whitelisted[_referrer], "invalid referrer");
            referrals[_referrer].push(msg.sender);
            user.referrer = _referrer;
        }

        user.totalPurchasedAmount += ptWithBonus;
        totalLockedAmount += ptWithBonus;
        totalReferralsFeeInfo[user.referrer] += (_pictoTokenAmount * referrerFeeBps) / BP;

        users.add(msg.sender);

        uint256 payableAmount = (_pictoTokenAmount * paymentInfo.price) / 10 ** pictoTokenDecimals;
        require(payableAmount > 0, "payableAmount is zero");
        uint256 referrerFee = (payableAmount * referrerFeeBps) / BP;
        referralsFee[user.referrer][paymentInfo.tokenAddress] += referrerFee;
        purchases[msg.sender].push(
            Purchase(paymentInfo.tokenAddress, block.timestamp, _pictoTokenAmount, payableAmount)
        );
        _pay(paymentInfo.tokenAddress, msg.sender, address(this), payableAmount);
        _pay(paymentInfo.tokenAddress, address(this), owner(), payableAmount - referrerFee);

        emit BuyPictoTokens(msg.sender, _pictoTokenAmount, payableAmount);
    }

    /// @notice Allows a user to withdraw their referral fees for the specified tokens.
    /// @dev Iterates through the provided list of tokens, checks and resets the referral fee balance, then pays the fee to the caller.
    /// @param tokens An array of token addresses for which the referral fees are to be withdrawn by the caller.
    function withdrawReferralFee(address[] calldata tokens) external {
        mapping(address => uint256) storage feeMap = referralsFee[msg.sender];
        for (uint256 i = 0; i < tokens.length; i++) {
            address token = tokens[i];
            uint256 fee = feeMap[token];
            if (fee == 0) continue;
            feeMap[token] = 0;
            _pay(token, address(this), msg.sender, fee);
        }
    }

    /// @notice Withdraws unlocked Picto tokens to the caller's address.
    /// @dev Requires the sale to have ended and that the user has unlocked tokens available for withdrawal.
    /// @custom:requirement The sale must be concluded for withdrawals to proceed.
    /// @custom:requirement The user must have a non-zero amount of locked Picto tokens.
    /// @custom:requirement There must be non-zero unlocked tokens to withdraw.
    function withdrawUnlockedPictoTokens() external {
        require(!isSaleTime(), "sale is not over");
        UserInfo storage user = userInfo[msg.sender];
        uint256 lockedAmount = user.totalPurchasedAmount - user.totalWithdrawnAmount;
        require(lockedAmount > 0, "you don't have tokens");
        uint256 unlockedAmount = calculateUnlockedAmount(msg.sender);
        require(unlockedAmount > 0, "unlocked iz zero");
        user.totalWithdrawnAmount += unlockedAmount;
        totalLockedAmount -= unlockedAmount;
        _pay(pictoToken, address(this), msg.sender, unlockedAmount);
        emit WithdrawTokens(msg.sender, unlockedAmount);
    }

    function _pay(address token, address payer, address recipient, uint256 value) private {
        if (value > 0) {
            if (payer == address(this)) {
                IERC20(token).safeTransfer(recipient, value);
            } else {
                IERC20(token).safeTransferFrom(payer, recipient, value);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/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.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
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].
     *
     * CAUTION: See Security Considerations above.
     */
    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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/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;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    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));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    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");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    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");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation 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).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // 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 cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, "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");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or 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 {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // 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);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.

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.
 *
 * ```solidity
 * 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) {
        bytes32[] memory store = _values(set._inner);
        bytes32[] memory result;

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

        return result;
    }

    // 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 in 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;
    }
}

{
  "evmVersion": "paris",
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "metadata": {
    "bytecodeHash": "none"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"inputs":[{"internalType":"address","name":"_pictoToken","type":"address"},{"components":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"minPurchasedAmount","type":"uint256"}],"internalType":"struct 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PictoTokenSale.PaymentToken","name":"_paymentToken","type":"tuple"}],"name":"addPaymentToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"availablePictoTokens","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_paymentTokenID","type":"uint256"},{"internalType":"uint256","name":"_pictoTokenAmount","type":"uint256"},{"internalType":"address","name":"_referrer","type":"address"}],"name":"buyPictoTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"}],"name":"calculateUnlockedAmount","outputs":[{"internalType":"uint256","name":"unlockedAmount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_paymentTokenID","type":"uint256"},{"internalType":"uint256","name":"_price","type":"uint256"},{"internalType":"uint256","name":"_minPurchasedAmount","type":"uint256"}],"name":"changePaymentToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_referrerFeeBps","type":"uint256"}],"name":"changeReferrerFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"endOfSale","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"}],"name":"getReferralFeeBalance","outputs":[{"internalType":"uint256[]","name":"balances","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"referrer","type":"address"}],"name":"getReferralsInfo","outputs":[{"internalType":"uint256","name":"totalFeeInPictoToken","type":"uint256"},{"internalType":"uint256","name":"totalPurchasedAmount","type":"uint256"},{"components":[{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"purchasedAmount","type":"uint256"}],"internalType":"struct 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00000000000000000000000098a01a0f1ece58a79b745020aa9096b2b07bcdb400000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000001000000000000000000000000dac17f958d2ee523a2206206994597c13d831ec7000000000000000000000000000000000000000000000000000000000000232800000000000000000000000000000000000000000000025a5419af66253c0000

-----Decoded View---------------
Arg [0] : _pictoToken (address): 0x98A01a0F1ECE58a79B745020aA9096B2B07Bcdb4
Arg [1] : _paymentTokens (tuple[]): System.Collections.Generic.List`1[Nethereum.ABI.FunctionEncoding.ParameterOutput]

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 00000000000000000000000098a01a0f1ece58a79b745020aa9096b2b07bcdb4
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000040
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [3] : 000000000000000000000000dac17f958d2ee523a2206206994597c13d831ec7
Arg [4] : 0000000000000000000000000000000000000000000000000000000000002328
Arg [5] : 00000000000000000000000000000000000000000000025a5419af66253c0000