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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";

import "../../base/GOBValidCurrencies/GOBValidCurrencies.sol";
import "../../base/GOBWithdraw/GOBWithdraw.sol";
import "../vesting/Vesting.sol";
import "./IOTCController.sol";

/**
 * @title Guardians of the Ball - OTC_Controller
 * @author Matias Arazi - Guardians of the Ball
 * @notice It is a smart contract designed to sell a token in the OTC phase using stablecoins of the dollar.
 */
contract OTCController is IOTCController, AccessControl, GOBValidCurrencies, GOBWithdraw {
	using SafeERC20 for IERC20Metadata;
	using EnumerableSet for EnumerableSet.AddressSet;

	// Flags to manage the sale state
	bool public isSaleOpen = false;
	bool public alreadyOpen = false;

	// Role constants
	bytes32 public constant SALES_TRIGGERER_ROLE = keccak256("SALES_TRIGGERER_ROLE");
	bytes32 public constant PRICE_MANAGER_ROLE = keccak256("PRICE_MANAGER_ROLE");
	bytes32 public constant WITHDRAW_ROLE = keccak256("WITHDRAW_ROLE");

	// Decimal precision for token amounts
	uint256 public immutable decimals;

	// Addresses and contracts
	address public vesting;
	address public immutable fundingWallet;
	IERC20Metadata public immutable sellingToken;
	uint256 public price;

	/**
	 * @dev Emitted when tokens are sold to a beneficiary using a stablecoin.
	 * @param beneficiary The address of the beneficiary who purchased tokens.
	 * @param stablecoinAddress The address of the stablecoin used for the purchase.
	 * @param amount The amount of tokens purchased.
	 */
	event Sold(address indexed beneficiary, address indexed stablecoinAddress, uint256 amount);

	/**
	 * @dev Modifier to check if the sale is open.
	 * This modifier verifies whether the `isSaleOpen` flag is true before allowing the function to proceed.
	 * If the sale is not open, the function call will be reverted.
	 */
	modifier saleIsOpen() {
		require(isSaleOpen, "OTCController: Sales are closed");
		_;
	}

	/**
	 * @notice Constructor to initialize the contract.
	 * @param decimals_ Decimal precision for token price.
	 * @param fundingWalletAddress_ Address of the wallet containing funds for sales.
	 * @param sellingTokenAddress_ Address of the token to be sold.
	 *
	 * Requirements:
	 * - The stablecoins address must be unique in the list.
	 * - The stablecoins address decimals MUST be less than 'decimals_'.
	 */
	constructor(
		address[] memory stablecoins_,
		uint256 decimals_,
		address fundingWalletAddress_,
		address sellingTokenAddress_
	) {
		sellingToken = IERC20Metadata(sellingTokenAddress_);

		// Cannot be greater than 6 to be able to work with USDT and USDC
		require(decimals_ <= 6, "Price decimals must be <= 6");
		require(
			decimals_ <= sellingToken.decimals(),
			"Price decimals must be <= sellingToken decimals"
		);

		// Assign the contract deployer as the default admin role
		_grantRole(DEFAULT_ADMIN_ROLE, _msgSender());

		decimals = decimals_;
		fundingWallet = fundingWalletAddress_;

		// Add the initial stablecoins to the set
		for (uint256 i = 0; i < stablecoins_.length; ) {
			require(!_currencies.contains(stablecoins_[i]), "Currency already added");
			_addCurrencyDec(stablecoins_[i]);
			unchecked {
				++i;
			}
		}
	}

	/**
	 * @notice Check if the sale is available.
	 * @return A boolean indicating whether fundingWallet has funds and has allowance.
	 */
	function checkAvailability() external view returns (bool) {
		uint256 minPurchase = 10 ** (sellingToken.decimals() - decimals);
		return
			sellingToken.balanceOf(fundingWallet) > minPurchase &&
			sellingToken.allowance(fundingWallet, address(this)) > minPurchase;
	}

	/**
	 * @notice Purchase tokens using a stablecoin.
	 * @param currency The address of the stablecoin to use for the purchase.
	 * @param amount The amount of tokens you want to buy in 'decimals'.
	 * @dev If you want to buy 14.5 tokens, amount should be equal to 14.5 * 10^decimals
	 *
	 *
	 * Requirements:
	 * - The stablecoin address must be valid.
	 * - The caller must pay with a valid stablecoin.
	 */
	function buyTokens(
		address currency,
		uint256 amount
	) external validCurrency(currency) saleIsOpen {
		require(amount != 0, "OTCController: amount is zero");
		require(price != 0, "OTCController: price is zero");
		IERC20Metadata _currency = IERC20Metadata(currency);

		uint256 finalPrice = (price * amount * (10 ** (_currency.decimals()))) /
			(10 ** (2 * decimals));
		_currency.safeTransferFrom(_msgSender(), address(this), finalPrice);

		uint tokenAmount = amount * 10 ** (sellingToken.decimals() - decimals);
		sellingToken.safeTransferFrom(fundingWallet, vesting, tokenAmount);

		IVesting vestingContract = IVesting(vesting);
		vestingContract.createAgenda(_msgSender(), tokenAmount);
		emit Sold(_msgSender(), currency, tokenAmount);
	}

	/**
	 * @notice Set the price for purchasing tokens.
	 * @param _price The new price in stablecoins.
	 *
	 * Requirements:
	 * - The new price must be greater than zero.
	 * - The caller must have the PRICE_MANAGER_ROLE.
	 */
	function setPrice(uint256 _price) external onlyRole(PRICE_MANAGER_ROLE) {
		require(_price > 0, "OTCController: Price MUST be greater than zero");

		price = _price;
		emit PriceSetted(_msgSender(), _price);
	}

	/**
	 * @notice Add a stablecoin to the list of accepted stablecoins.
	 * @param currency The address of the stablecoin to add.
	 *
	 * Requirements:
	 * - The token address must not be an accepted stablecoin.
	 * - The token address must be a valid ERC20 token.
	 * - The token address decimals MUST be less than 'decimals'.
	 * - The caller must have the PRICE_MANAGER_ROLE.
	 */
	function addCurrency(address currency) external onlyRole(PRICE_MANAGER_ROLE) {
		_addCurrencyDec(currency);
	}

	/**
	 * @notice Remove a stablecoin from the list of accepted stablecoins.
	 * @param currency The address of the stablecoin to remove.
	 *
	 * Requirements:
	 * - The caller must have the PRICE_MANAGER_ROLE.
	 */
	function removeCurrency(address currency) external onlyRole(PRICE_MANAGER_ROLE) {
		_removeCurrency(currency);
	}

	/**
	 * @notice Open the sale, allowing token purchases.
	 * @param initialAuthorizers Addresses initially authorized to interact with the vesting contract.
	 * @param initialAuthorizedSpenders Addresses initially authorized to spend tokens from the vesting contract.
	 * @param releaseTime The release time for the vesting contract.
	 *
	 * Requirements:
	 * - The funding wallet must have allocated allowance to this contract.
	 * - Sales must not have been opened previously.
	 * - Sales must not have been closed previously.
	 * - A price must be assigned.
	 * - At least one stablecoin must be added.
	 * - The caller must have the SALES_TRIGGERER_ROLE.
	 */
	function openSale(
		address[] calldata initialAuthorizers,
		address[] calldata initialAuthorizedSpenders,
		uint256 releaseTime
	) external onlyRole(SALES_TRIGGERER_ROLE) {
		require(
			sellingToken.allowance(fundingWallet, address(this)) > 0,
			"OTCController: Controller needs allowance"
		);
		require(!isSaleOpen, "OTCController: Sales are already opened");
		require(!alreadyOpen, "OTCController: Unable to open sales again");
		require(price > 0, "OTCController: Price is not assigned");
		require(_currencies.length() > 0, "OTCController: Stablecoin not added");

		Vesting vestingContract = new Vesting(
			address(sellingToken),
			initialAuthorizers,
			initialAuthorizedSpenders,
			releaseTime
		);
		vesting = address(vestingContract);
		isSaleOpen = true;
		alreadyOpen = true;
		emit SaleOpened();
	}

	/**
	 * @notice Close the token sale, preventing further purchases.
	 *
	 * Requirements:
	 * - Sales must have been opened previously.
	 * - The caller must have the SALES_TRIGGERER_ROLE.
	 */
	function closeSale() external onlyRole(SALES_TRIGGERER_ROLE) saleIsOpen {
		isSaleOpen = false;
		emit SaleClosed();
	}

	/**
	 * @notice  See {GOBWithdraw-_withdrawSet}.
	 */
	function withdrawCurencies() external onlyRole(WITHDRAW_ROLE) {
		require(_withdrawSet(_currencies), "OTCController: No balance available");
	}

	/**
	 * @notice  See {GOBWithdraw-_withdraw}.
	 */
	function withdraw(address token, uint256 amount) external onlyRole(WITHDRAW_ROLE) {
		require(amount > 0, "OTCController: Amount cannot be zero");
		_withdraw(token, amount);
	}

	/**
	 * @notice  Vaidates newCurrency decimals.
	 */
	function _addCurrencyDec(address newCurrency) private {
		require(
			IERC20Metadata(newCurrency).decimals() >= decimals,
			"OTCController: Currency decimals too low"
		);
		_addCurrency(newCurrency);
	}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(account),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

// 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 v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";
import "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// 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;
    }
}

//...........,,..,,,,,,,..................................
//......###(#######(,,,,.##########....######(((((*.......
//......%%%%%%%%%%%%%.,#%%%%%%%%%%%%%..%%%%%%%%%%%%%......
//......%%%%%...%%%&%,,%%&&&,,,,&&%%%..%%%%%...%%%%%......
//......&&&&&...&&.,,,,&&&&&,***&&&&&..&&&&&...&&&&&......
//......&&&&&.,,,,,,,,*&@@@@///*@@&@&,.&&&&&...&&&&&......
//.....*@@@@@.@@@@@@&**@@@@@%%#/@@@@,,&@@@@@@@@@@@@.......
//......@@@@@.@@@#@@@**&@@@@%&#(@@@@@,,@@@@@@@@@@@@@......
//......&&&&&...@@@@@,*&@@@@////@@@@@,,&&&&&...&&&&&......
//......&&&&&...&&&&&,,&&&&@***,&&&&&,.&&&&&...&&&&&......
//......%%%&&...&&&&&,,%&&&&,,,,&&&&&..&&&%%...&&&&&......
//......%%%%%%%%%%%%%..#%%%%%%%%%%%%#..%%%%%%%%%%%%%......
//........................................................

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";

/**
 * @author  Alejandro Garrido - Guardians of the Ball.
 * @title   Guardians of the Ball - GOBValidCurrencies.
 * @dev     Helper to manage a list of accepted currencies in inherited contracts.
 * Child contracts can call _addCurrency(), _removeCurrency(), and use the modifier validCurrency().
 * They can also access the list in the internal AddressSet `_currencies`.
 */

abstract contract GOBValidCurrencies {
	using EnumerableSet for EnumerableSet.AddressSet;

	/**
	 * @dev Emitted when new valid currency is added.
	 */
	event CurrencyRemoved(address indexed newCurrency);

	/**
	 * @dev Emitted when a valid currency is removed.
	 */
	event CurrencyAdded(address indexed newCurrency);

	modifier validCurrency(address currency) {
		require(_currencies.contains(currency), "GOBValidCurrencies: Invalid currency");
		_;
	}

	// Accepted currencies.
	EnumerableSet.AddressSet internal _currencies;

	/**
	 * @notice Returns all ERC20 accepted as payment.
	 * @return Array with all ERC20 addresses.
	 */
	function validCurrencies() external view returns (address[] memory) {
		return _currencies.values();
	}

	/**
	 * @notice Check if a currency is listed.
	 * @param currency The ERC20 address.
	 * @return Whether the ERC20 is listed or not.
	 */
	function isValidCurrency(address currency) external view returns (bool) {
		return _currencies.contains(currency);
	}

	/**
	 * @notice Adds a new currency to the list of ERC20s accepted.
	 *
	 * Emits {CurrencyAdded}.
	 *
	 * @param newCurrency ERC20 address (ie: usdc).
	 */
	function _addCurrency(address newCurrency) internal {
		require(newCurrency != address(0), "GOBValidCurrencies: Zero address");
		require(!_currencies.contains(newCurrency), "GOBValidCurrencies: Currency already exists");
		_currencies.add(newCurrency);
		emit CurrencyAdded(newCurrency);
	}

	/**
	 * @notice Removes an ERC20 from the accepted list of currencies.
	 *
	 * Emits {CurrencyRemoved}.
	 *
	 * @param currency ERC20 address.
	 */
	function _removeCurrency(address currency) internal validCurrency(currency) {
		require(_currencies.length() > 1, "GOBValidCurrencies: Only one currency left");
		_currencies.remove(currency);
		emit CurrencyRemoved(currency);
	}
}

//...........,,..,,,,,,,..................................
//......###(#######(,,,,.##########....######(((((*.......
//......%%%%%%%%%%%%%.,#%%%%%%%%%%%%%..%%%%%%%%%%%%%......
//......%%%%%...%%%&%,,%%&&&,,,,&&%%%..%%%%%...%%%%%......
//......&&&&&...&&.,,,,&&&&&,***&&&&&..&&&&&...&&&&&......
//......&&&&&.,,,,,,,,*&@@@@///*@@&@&,.&&&&&...&&&&&......
//.....*@@@@@.@@@@@@&**@@@@@%%#/@@@@,,&@@@@@@@@@@@@.......
//......@@@@@.@@@#@@@**&@@@@%&#(@@@@@,,@@@@@@@@@@@@@......
//......&&&&&...@@@@@,*&@@@@////@@@@@,,&&&&&...&&&&&......
//......&&&&&...&&&&&,,&&&&@***,&&&&&,.&&&&&...&&&&&......
//......%%%&&...&&&&&,,%&&&&,,,,&&&&&..&&&%%...&&&&&......
//......%%%%%%%%%%%%%..#%%%%%%%%%%%%#..%%%%%%%%%%%%%......
//........................................................

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";

/**
 * @author  Matias Arazi - Guardians of the Ball.
 * @title   Guardians of the Ball - GOBWithdraw.
 * @dev     Helper to manage withdraw functions in inherited contracts.
 * Child contracts can call _withdraw(), _withdrawSet().
 */

abstract contract GOBWithdraw is Context {
	using EnumerableSet for EnumerableSet.AddressSet;
	using SafeERC20 for IERC20;

	/**
	 * @dev Emitted when funds are withdrawn from the contract for a specific tokenAddress.
	 * @param callerAddress The address of the caller who initiated the withdrawal.
	 * @param tokenAddress The address of the tokenAddress from which funds are withdrawn.
	 * @param amount The amount of tokenAddress withdrawn.
	 */
	event Withdrawn(address indexed callerAddress, address indexed tokenAddress, uint256 amount);

	/**
	 * @notice Withdraw funds from the contract for a specific tokenAddress.
	 * @param token The address of the tokenAddress to withdraw from.
	 * @param amount The amount of tokenAddress withdrawn.
	 *
	 * Requirements:
	 * - The token address must be a valid ERC20 token. (address must be an erc20)
	 */
	function _withdraw(address token, uint256 amount) internal {
		IERC20 currency = IERC20(token);
		currency.safeTransfer(msg.sender, amount);
		emit Withdrawn(_msgSender(), token, amount);
	}

	/**
	 * @notice Withdraw funds from the contract for multiple token addresses.
	 * @param tokenSet AddressSet of tokens in storage.
	 * @return isWithdrawn Withdrawn at least one of the tokens in `tokenSet`
	 */
	function _withdrawSet(
		EnumerableSet.AddressSet storage tokenSet
	) internal returns (bool isWithdrawn) {
		uint256 balance;
		uint256 len = tokenSet.length();
		IERC20 currency;

		for (uint256 i = 0; i < len; ) {
			currency = IERC20(tokenSet.at(i));
			balance = currency.balanceOf(address(this));
			if (balance > 0) {
				_withdraw(address(currency), balance);
				isWithdrawn = true;
			}
			unchecked {
				i++;
			}
		}
	}
}

//...........,,..,,,,,,,..................................
//......###(#######(,,,,.##########....######(((((*.......
//......%%%%%%%%%%%%%.,#%%%%%%%%%%%%%..%%%%%%%%%%%%%......
//......%%%%%...%%%&%,,%%&&&,,,,&&%%%..%%%%%...%%%%%......
//......&&&&&...&&.,,,,&&&&&,***&&&&&..&&&&&...&&&&&......
//......&&&&&.,,,,,,,,*&@@@@///*@@&@&,.&&&&&...&&&&&......
//.....*@@@@@.@@@@@@&**@@@@@%%#/@@@@,,&@@@@@@@@@@@@.......
//......@@@@@.@@@#@@@**&@@@@%&#(@@@@@,,@@@@@@@@@@@@@......
//......&&&&&...@@@@@,*&@@@@////@@@@@,,&&&&&...&&&&&......
//......&&&&&...&&&&&,,&&&&@***,&&&&&,.&&&&&...&&&&&......
//......%%%&&...&&&&&,,%&&&&,,,,&&&&&..&&&%%...&&&&&......
//......%%%%%%%%%%%%%..#%%%%%%%%%%%%#..%%%%%%%%%%%%%......
//........................................................

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

/**
 * @title Guardians of the Ball - IOTCController
 * @author Guardians of the Ball
 * @notice OTCController contract Interface
 */

interface IOTCController {
	/**
	 * @dev Emitted when the price for purchasing tokens is set.
	 * @param callerAddress The address of the caller who set the price.
	 * @param price The new price in stablecoins.
	 */
	event PriceSetted(address indexed callerAddress, uint256 price);

	/**
	 * @dev Emitted when the token sale is opened for purchases.
	 */
	event SaleOpened();

	/**
	 * @dev Emitted when the token sale is closed, preventing further purchases.
	 */
	event SaleClosed();

	/**
	 * @dev Returns if sales are open or not.
	 */
	function isSaleOpen() external view returns (bool);

	/**
	 * @notice Purchase tokens using a stablecoin.
	 * @param _stablecoin The address of the stablecoin to use for the purchase.
	 * @param amount The amount of stablecoins to exchange for tokens.
	 *
	 * Requirements:
	 * - The stablecoin address must be valid.
	 * - The caller must pay with a valid stablecoin.
	 */
	function buyTokens(address _stablecoin, uint256 amount) external;
}

//...........,,..,,,,,,,..................................
//......###(#######(,,,,.##########....######(((((*.......
//......%%%%%%%%%%%%%.,#%%%%%%%%%%%%%..%%%%%%%%%%%%%......
//......%%%%%...%%%&%,,%%&&&,,,,&&%%%..%%%%%...%%%%%......
//......&&&&&...&&.,,,,&&&&&,***&&&&&..&&&&&...&&&&&......
//......&&&&&.,,,,,,,,*&@@@@///*@@&@&,.&&&&&...&&&&&......
//.....*@@@@@.@@@@@@&**@@@@@%%#/@@@@,,&@@@@@@@@@@@@.......
//......@@@@@.@@@#@@@**&@@@@%&#(@@@@@,,@@@@@@@@@@@@@......
//......&&&&&...@@@@@,*&@@@@////@@@@@,,&&&&&...&&&&&......
//......&&&&&...&&&&&,,&&&&@***,&&&&&,.&&&&&...&&&&&......
//......%%%&&...&&&&&,,%&&&&,,,,&&&&&..&&&%%...&&&&&......
//......%%%%%%%%%%%%%..#%%%%%%%%%%%%#..%%%%%%%%%%%%%......
//........................................................

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

/**
 * @title Guardians of the Ball - IVesting
 * @author Guardians of the Ball
 * @notice Vesting contract Interface
 */
interface IVesting {
	/**
	 * @dev Agenda struct.
	 * @param account The address of the agenda owner.
	 * @param amount The amount of tokens currently being locked, amount is substracted for each withdrawal/authorizedWithdrawal.
	 * @param endTime The end time of the vesting in unix timestamp.
	 */
	struct Agenda {
		uint256 amount;
		uint256 endTime;
	}

	/**
	 * @notice Emitted when a new agenda is created by the `OTC_CONTROLLER_ROLE`.
	 * @param account The address of the agenda owner.
	 * @param amount The amount of tokens to be vested.
	 * @param agendaId the hash identifier of the agenda
	 * @param start The start time of the vesting in unix timestamp.
	 * @param end The end time of the vesting in unix timestamp.
	 */
	event AgendaCreated(
		address indexed account,
		uint256 amount,
		bytes32 agendaId,
		uint256 start,
		uint256 end
	);

	/**
	 * @notice Emitted when a withdrawal or authorized withdrawal is made.
	 * @param account The address of the agenda owner.
	 * @param operator The address of the caller, if `operator` == `account` then it is a withdrawal, else, an authorized withdrawal.
	 * @param amount The amount of tokens withdrawn.
	 */
	event Withdrawn(address indexed account, address indexed operator, uint256 amount);

	/**
	 * @dev Returns the address of the token being vested.
	 */
	function token() external view returns (address);

	/**
	 * @dev Returns available balance of `account`.
	 * @param account The address to query.
	 */
	function balanceOf(address account) external view returns (uint256);

	/**
	 * @dev Returns locked balance of `account`.
	 * @param account The address to query.
	 */
	function totalLocked(address account) external view returns (uint256);

	/**
	 * @dev Returns all vested balance of `account`.
	 * @param account The address to query.
	 */
	function totalVested(address account) external view returns (uint256);

	/**
	 * @dev withdraws all available tokens for the sender.
	 *
	 * Emits a {Withdrawn} event.
	 *
	 * Requirements:
	 * - the agenda must be unlocked.
	 * - the sender must have a non-zero balance.
	 */
	function withdraw() external;

	/**
	 * @dev withdraws `amount` tokens for `agendaOwner`.
	 * @param agendaOwner address to spend `amount` tokens from
	 * @param amount The amount of tokens to spend.
	 *
	 * Emits a {Withdrawn} event.
	 *
	 * Requirements:
	 * - `agendaOwner` must have a non-zero balance.
	 * - Must be called by `AUTHORIZED_SPENDER_ROLE`
	 * - `agendaOwner` must have approved operator or caller to spend `amount` tokens
	 */
	function withdrawFrom(address agendaOwner, uint256 amount) external;

	/**
	 * @dev Creates a new agenda that locks `amount` tokens for `beneficiary` until `block.timestamp` + `durationPerAgenda`.
	 * @param beneficiary The address of the agenda owner.
	 * @param amount The amount of tokens to be vested.
	 *
	 * Emits a {AgendaCreated} event.
	 *
	 * Requirements:
	 * - Must be called by `OTC_CONTROLLER_ROLE`
	 * - `beneficiary` must not be the zero address.
	 * - `amount` must be non-zero.
	 * - `beneficiary` must have approved contract to spend `amount` tokens.
	 */
	function createAgenda(address beneficiary, uint256 amount) external;
}

//...........,,..,,,,,,,..................................
//......###(#######(,,,,.##########....######(((((*.......
//......%%%%%%%%%%%%%.,#%%%%%%%%%%%%%..%%%%%%%%%%%%%......
//......%%%%%...%%%&%,,%%&&&,,,,&&%%%..%%%%%...%%%%%......
//......&&&&&...&&.,,,,&&&&&,***&&&&&..&&&&&...&&&&&......
//......&&&&&.,,,,,,,,*&@@@@///*@@&@&,.&&&&&...&&&&&......
//.....*@@@@@.@@@@@@&**@@@@@%%#/@@@@,,&@@@@@@@@@@@@.......
//......@@@@@.@@@#@@@**&@@@@%&#(@@@@@,,@@@@@@@@@@@@@......
//......&&&&&...@@@@@,*&@@@@////@@@@@,,&&&&&...&&&&&......
//......&&&&&...&&&&&,,&&&&@***,&&&&&,.&&&&&...&&&&&......
//......%%%&&...&&&&&,,%&&&&,,,,&&&&&..&&&%%...&&&&&......
//......%%%%%%%%%%%%%..#%%%%%%%%%%%%#..%%%%%%%%%%%%%......
//........................................................

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";

import "./IVesting.sol";
import "../otc/IOTCController.sol";

/**
 * @title Guardians of the Ball - Vesting
 * @author Guardians of the Ball
 * @notice The Vesting contract allows the management of locked tokens and their scheduled release in a given period of time.
 * 		   The tokens can be transferred to a list of authorized addresses, possibly just one that is the Marketplace,
 *         allowing the buyer to purchase NFTs during the lock-in period.
 *         This contract only accepts the blocking of a specific ERC20 token.
 * 		   Each block (or vesting) is known internally as an “agenda”.
 */
contract Vesting is IVesting, AccessControl {
	using Address for address;
	using SafeERC20 for IERC20;

	bytes32 public constant AUTHORIZER_ROLE = keccak256("AUTHORIZER_ROLE");
	bytes32 public constant AUTHORIZED_SPENDER_ROLE = keccak256("AUTHORIZED_SPENDER_ROLE");
	bytes32 public constant OTC_CONTROLLER_ROLE = keccak256("OTC_CONTROLLER_ROLE");

	uint8 public constant AGENDAS_MAX = 255;
	uint256 internal constant UINT256_MAX = 2 ** 256 - 1;

	/**
	 * @notice ERC20 token to vest.
	 * @dev See {IVesting-token}.
	 */
	address public immutable token;

	/// @dev Duration of each agenda or Vesting.
	uint256 public immutable durationPerAgenda;

	/// @dev beneficiary => Agenda Nonce
	mapping(address => uint256) private _agendaNonce;
	/// @dev beneficiary => Agenda Nonce Start
	mapping(address => uint256) private _agendaNonceStart;
	/// @dev Agenda Id => Agenda (AgendaId = hash(address,nonce))
	mapping(bytes32 => Agenda) private _agendas;

	/// @dev Controller contract address.
	IOTCController public immutable controller;

	/**
	 * @param token_ ERC20 to vest
	 * @param initialAuthorizers  Initial addresses that will have AUTHORIZER_ROLE
	 * @param initialAuthorizedSpenders Initial addresses that will have AUTHORIZED_SPENDER_ROLE
	 * @param durationPerAgenda_  Duration of each agenda or Vesting in unix timestamp.
	 */
	constructor(
		address token_,
		address[] memory initialAuthorizers,
		address[] memory initialAuthorizedSpenders,
		uint256 durationPerAgenda_
	) {
		require(initialAuthorizers.length != 0, "Vesting: initialAuthorizers is empty");

		_setRoleAdmin(AUTHORIZED_SPENDER_ROLE, AUTHORIZER_ROLE);
		_grantRole(OTC_CONTROLLER_ROLE, _msgSender());
		controller = IOTCController(_msgSender());

		token = token_;
		durationPerAgenda = durationPerAgenda_;

		for (uint256 i = 0; i < initialAuthorizedSpenders.length; ) {
			_grantRole(AUTHORIZED_SPENDER_ROLE, initialAuthorizedSpenders[i]);
			unchecked {
				++i;
			}
		}
		for (uint256 i = 0; i < initialAuthorizers.length; ) {
			_grantRole(AUTHORIZER_ROLE, initialAuthorizers[i]);
			unchecked {
				++i;
			}
		}
	}

	/**
	 * @dev See {IVesting-balanceOf}
	 */
	function balanceOf(address account) external view returns (uint256) {
		(uint256 availableBalance, ) = _getBalances(account);
		return availableBalance;
	}

	/**
	 * @dev See {IVesting-totalLocked}
	 */
	function totalLocked(address account) external view returns (uint256) {
		(uint256 availableBalance, uint256 totalVestedBalance) = _getBalances(account);
		return totalVestedBalance - availableBalance;
	}

	/**
	 * @dev See {IVesting-totalVested}
	 */
	function totalVested(address account) external view returns (uint256) {
		(, uint256 totalVestedBalance) = _getBalances(account);
		return totalVestedBalance;
	}

	/**
	 * @dev See {IVesting-withdraw}
	 */
	function withdraw() external {
		address account = _msgSender();

		uint256 amountSubstracted = _substractBalances(account, UINT256_MAX, false);

		IERC20(token).safeTransfer(account, amountSubstracted);

		emit Withdrawn(account, account, amountSubstracted);
	}

	/**
	 * @dev See {IVesting-withdrawFrom}
	 */
	function withdrawFrom(
		address agendaOwner,
		uint256 amount
	) external onlyRole(AUTHORIZED_SPENDER_ROLE) {
		require(amount > 0, "Vesting: amount is zero");
		require(agendaOwner != address(0), "Vesting: agendaOwner is the zero address");

		address operator = _msgSender();

		require(
			_substractBalances(agendaOwner, amount, true) == amount,
			"Vesting: amount exceeds balance"
		);

		IERC20(token).safeTransfer(operator, amount);

		emit Withdrawn(agendaOwner, operator, amount);
	}

	/**
	 * @dev See {IVesting-createAgenda}
	 */
	function createAgenda(
		address beneficiary,
		uint256 amount
	) external onlyRole(OTC_CONTROLLER_ROLE) {
		require(beneficiary != address(0), "Vesting: beneficiary is the zero address");
		require(amount != 0, "Vesting: amount is zero");

		uint256 agendaNonce = _agendaNonce[beneficiary];
		require(
			agendaNonce - _agendaNonceStart[beneficiary] <= AGENDAS_MAX,
			"Vesting: Max agendas reached for beneficiary"
		);

		uint256 timestamp = block.timestamp;
		uint256 endTime = timestamp + durationPerAgenda;

		Agenda memory agenda = Agenda(amount, endTime);
		bytes32 agendaId = _hashAgenda(beneficiary, agendaNonce);

		_agendaNonce[beneficiary]++;
		_agendas[agendaId] = agenda;

		emit AgendaCreated(beneficiary, amount, agendaId, timestamp, endTime);
	}

	/**
	 * @dev Iterates over all `account` agendas and returns the total available balance and the total locked balance.
	 * @param account The address to query.
	 * @return totalAvailableBalance The total available balance.
	 * @return totalVestedBalance The total vested balance.
	 * @dev total locked balance = total vested balance - total available balance
	 */
	function _getBalances(
		address account
	) private view returns (uint256 totalAvailableBalance, uint256 totalVestedBalance) {
		uint256 nAgendas = _agendaNonce[account];
		uint256 nsAgendas = _agendaNonceStart[account];
		uint256 timestamp = block.timestamp;
		for (uint256 i = nsAgendas; i < nAgendas; ) {
			bytes32 agendaId = _hashAgenda(account, i);
			Agenda storage agenda = _agendas[agendaId];
			if (timestamp >= agenda.endTime) {
				totalAvailableBalance += agenda.amount;
			}
			totalVestedBalance += agenda.amount;
			unchecked {
				++i;
			}
		}
	}

	/**
	 * @dev Iterates over all `account` agendas and subtracts `amountToSubtract` from them.
	 * @param account The address to query.
	 * @param amountToSubtract The amount to subtract.
	 * @param substractLocked If true, subtracts from locked balances, otherwise from available balances.
	 * @return amountSubstracted The total amount subtracted, it can be less than `amountToSubtract` if there is not enough balance.
	 *                           If it is zero, it means that there is no balance.
	 */
	function _substractBalances(
		address account,
		uint256 amountToSubtract,
		bool substractLocked
	) private returns (uint256 amountSubstracted) {
		uint256 nAgendas = _agendaNonce[account];
		uint256 nsAgendas = _agendaNonceStart[account];
		uint256 timestamp = block.timestamp;
		for (uint256 i = nsAgendas; i < nAgendas; i++) {
			if (amountToSubtract == 0) break;
			bytes32 agendaId = _hashAgenda(account, i);
			Agenda storage agenda = _agendas[agendaId];
			// If agenda does not exist, continue
			if (agenda.endTime == 0) continue;
			if (!substractLocked && timestamp < agenda.endTime) continue;
			if (agenda.amount >= amountToSubtract) {
				agenda.amount -= amountToSubtract;
				amountSubstracted += amountToSubtract;
				amountToSubtract = 0;
				// If agenda is empty, delete it
				if (agenda.amount == 0) {
					_agendaNonceStart[account]++;
					delete _agendas[agendaId];
				}
			} else {
				amountToSubtract -= agenda.amount;
				amountSubstracted += agenda.amount;
				_agendaNonceStart[account]++;
				delete _agendas[agendaId];
			}
		}
		require(amountSubstracted > 0, "Vesting: balance is zero");
	}

	/**
	 * @dev Creates a unique identifier for a given agenda.
	 * @param account the owner of the agenda
	 * @param agendaNonce nonce, should be equal to `_agendaNonce[account]`
	 */
	function _hashAgenda(address account, uint256 agendaNonce) private pure returns (bytes32) {
		return keccak256(abi.encodePacked(account, agendaNonce));
	}
}

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

• Certik - Nov 9th, 2023 - Security Audit Report

[{"inputs":[{"internalType":"address[]","name":"stablecoins_","type":"address[]"},{"internalType":"uint256","name":"decimals_","type":"uint256"},{"internalType":"address","name":"fundingWalletAddress_","type":"address"},{"internalType":"address","name":"sellingTokenAddress_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"newCurrency","type":"address"}],"name":"CurrencyAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"newCurrency","type":"address"}],"name":"CurrencyRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"callerAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"price","type":"uint256"}],"name":"PriceSetted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"anonymous":false,"inputs":[],"name":"SaleClosed","type":"event"},{"anonymous":false,"inputs":[],"name":"SaleOpened","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"beneficiary","type":"address"},{"indexed":true,"internalType":"address","name":"stablecoinAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Sold","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"callerAddress","type":"address"},{"indexed":true,"internalType":"address","name":"tokenAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdrawn","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PRICE_MANAGER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"SALES_TRIGGERER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"WITHDRAW_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"currency","type":"address"}],"name":"addCurrency","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"alreadyOpen","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"currency","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"buyTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"checkAvailability","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"closeSale","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"fundingWallet","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isSaleOpen","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"currency","type":"address"}],"name":"isValidCurrency","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"initialAuthorizers","type":"address[]"},{"internalType":"address[]","name":"initialAuthorizedSpenders","type":"address[]"},{"internalType":"uint256","name":"releaseTime","type":"uint256"}],"name":"openSale","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"price","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"currency","type":"address"}],"name":"removeCurrency","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sellingToken","outputs":[{"internalType":"contract IERC20Metadata","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_price","type":"uint256"}],"name":"setPrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"validCurrencies","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"vesting","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawCurencies","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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00000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000004000000000000000000000000f447c79218f9fdb4aa42eb151c06ed59d8a04ad200000000000000000000000070f300fe3c8d62a169d3c1d656d284c3b4e004610000000000000000000000000000000000000000000000000000000000000002000000000000000000000000c2132d05d31c914a87c6611c10748aeb04b58e8f0000000000000000000000002791bca1f2de4661ed88a30c99a7a9449aa84174

-----Decoded View---------------
Arg [0] : stablecoins_ (address[]): 0xc2132D05D31c914a87C6611C10748AEb04B58e8F,0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174
Arg [1] : decimals_ (uint256): 4
Arg [2] : fundingWalletAddress_ (address): 0xF447c79218F9fDB4aA42eB151c06eD59d8A04AD2
Arg [3] : sellingTokenAddress_ (address): 0x70F300FE3c8d62A169D3c1d656D284c3b4E00461

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [2] : 000000000000000000000000f447c79218f9fdb4aa42eb151c06ed59d8a04ad2
Arg [3] : 00000000000000000000000070f300fe3c8d62a169d3c1d656d284c3b4e00461
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [5] : 000000000000000000000000c2132d05d31c914a87c6611c10748aeb04b58e8f
Arg [6] : 0000000000000000000000002791bca1f2de4661ed88a30c99a7a9449aa84174