// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol)

pragma solidity ^0.8.20;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error AddressInsufficientBalance(address account);

    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedInnerCall();

    /**
     * @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/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert AddressInsufficientBalance(address(this));
        }

        (bool success, ) = recipient.call{value: amount}("");
        if (!success) {
            revert FailedInnerCall();
        }
    }

    /**
     * @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 or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {FailedInnerCall} error.
     *
     * 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.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @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`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert AddressInsufficientBalance(address(this));
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
     * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
     * unsuccessful call.
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata
    ) internal view returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            // only check if target is a contract if the call was successful and the return data is empty
            // otherwise we already know that it was a contract
            if (returndata.length == 0 && target.code.length == 0) {
                revert AddressEmptyCode(target);
            }
            return returndata;
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
     * revert reason or with a default {FailedInnerCall} error.
     */
    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            return returndata;
        }
    }

    /**
     * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}.
     */
    function _revert(bytes memory returndata) 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 FailedInnerCall();
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Base64.sol)

pragma solidity ^0.8.20;

/**
 * @dev Provides a set of functions to operate with Base64 strings.
 */
library Base64 {
    /**
     * @dev Base64 Encoding/Decoding Table
     */
    string internal constant _TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

    /**
     * @dev Converts a `bytes` to its Bytes64 `string` representation.
     */
    function encode(bytes memory data) internal pure returns (string memory) {
        /**
         * Inspired by Brecht Devos (Brechtpd) implementation - MIT licence
         * https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol
         */
        if (data.length == 0) return "";

        // Loads the table into memory
        string memory table = _TABLE;

        // Encoding takes 3 bytes chunks of binary data from `bytes` data parameter
        // and split into 4 numbers of 6 bits.
        // The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up
        // - `data.length + 2`  -> Round up
        // - `/ 3`              -> Number of 3-bytes chunks
        // - `4 *`              -> 4 characters for each chunk
        string memory result = new string(4 * ((data.length + 2) / 3));

        /// @solidity memory-safe-assembly
        assembly {
            // Prepare the lookup table (skip the first "length" byte)
            let tablePtr := add(table, 1)

            // Prepare result pointer, jump over length
            let resultPtr := add(result, 32)

            // Run over the input, 3 bytes at a time
            for {
                let dataPtr := data
                let endPtr := add(data, mload(data))
            } lt(dataPtr, endPtr) {

            } {
                // Advance 3 bytes
                dataPtr := add(dataPtr, 3)
                let input := mload(dataPtr)

                // To write each character, shift the 3 bytes (18 bits) chunk
                // 4 times in blocks of 6 bits for each character (18, 12, 6, 0)
                // and apply logical AND with 0x3F which is the number of
                // the previous character in the ASCII table prior to the Base64 Table
                // The result is then added to the table to get the character to write,
                // and finally write it in the result pointer but with a left shift
                // of 256 (1 byte) - 8 (1 ASCII char) = 248 bits

                mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance
            }

            // When data `bytes` is not exactly 3 bytes long
            // it is padded with `=` characters at the end
            switch mod(mload(data), 3)
            case 1 {
                mstore8(sub(resultPtr, 1), 0x3d)
                mstore8(sub(resultPtr, 2), 0x3d)
            }
            case 2 {
                mstore8(sub(resultPtr, 1), 0x3d)
            }
        }

        return result;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.23;

import { IERC20 } from "@openzeppelin/contracts/interfaces/IERC20.sol";

import { IVestMembership } from "src/IVestMembership.sol";
import { IVestMembershipDescriptor } from "src/VestMembershipDescriptor.sol";

/// @notice Namespace for the structs related with the presale configuration.
library Presale {
    struct Fees {
        uint16 tokenANumerator;
        uint16 tokenADenominator;
        uint16 tokenBNumerator;
        uint16 tokenBDenominator;
    }

    struct Configuration {
        Fees fees;
        IERC20 tokenA;
        IERC20 tokenB;
        address manager;
        address beneficiary;
        uint256 tgeTimestamp;
        uint256 listingTimestamp;
        uint256 claimbackPeriod;
    }
}

/// @notice Namespace for the structs related with the membership configuration.
library Membership {
    struct Fees {
        uint16 numerator;
        uint16 denominator;
    }

    struct Configuration {
        Fees fees;
        IVestMembership.Metadata metadata;
        IVestMembershipDescriptor descriptor;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

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

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

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

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.23;

import { IERC20 } from "@openzeppelin/contracts/interfaces/IERC20.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";

import { IWETH } from "src/libraries/IWETH.sol";

/// @title ERC20Helper
/// @notice Contains helper methods for interacting with ERC20 tokens.
library ERC20Helper {
    /// @notice Transfers tokens from the calling contract to a recipient.
    /// @param token The contract address of the token which will be transferred.
    /// @param to The recipient of the transfer.
    /// @param value The value of the transfer.
    function transfer(IERC20 token, address to, uint256 value) internal {
        SafeERC20.safeTransfer(token, to, value);
    }

    /**
     * @notice Transfers tokens from sender to a recipient and returns transferred amount.
     * @param token The contract address of the token which will be transferred.
     * @param sender The sender of the transfer.
     * @param to The recipient of the transfer.
     * @param value The value of the transfer.
     *
     * @dev Transferring tokens in some protocol functions cannot rely on given `amount`
     * because in the case of a token that collects tax or handles the `transfer` in a
     * custom way. In that case the value may not reflect the actual transferred value.
     *
     * Solution:
     * - before the transfer: save the current balance
     * - after the transfer: subtract this value from the new balance
     */
    function transferFrom(IERC20 token, address sender, address to, uint256 value) internal returns (uint256) {
        uint256 balance = token.balanceOf(to);

        SafeERC20.safeTransferFrom(token, sender, to, value);

        return token.balanceOf(to) - balance;
    }

    /// @notice Returns the decimals places of the token.
    /// @param token The contract address of the token.
    function decimals(IERC20 token) internal view returns (uint256) {
        return IERC20Metadata(address(token)).decimals();
    }

    /**
     * @notice Converts native coin to wrapped ERC20.
     * @param token Address of the token contract to be converted to.
     * @param sender The sender of the transfer.
     * @param recipient The recipient of the transfer.
     * @param expected The expected deposit amount
     * @param actual The actual amount of the deposit.
     * @return The amount of the deposit.
     *
     * @dev The mechanism returns zero when the actual amount is less than the
     * expected amount or when the conversion to wrapped token fails. In
     * addition, the mechanism sends back an excess amount of native token.
     */
    function deposit(IERC20 token, address sender, address recipient, uint256 expected, uint256 actual)
        internal
        returns (uint256)
    {
        if (actual < expected) return 0;

        uint256 amount = actual > expected ? expected : actual;

        uint256 balance = token.balanceOf(recipient);

        IWETH(address(token)).deposit{ value: amount }();

        if (token.balanceOf(recipient) < balance + amount) return 0;

        if (actual > amount) Address.sendValue(payable(sender), actual - amount);

        return amount;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.

pragma solidity ^0.8.20;

/**
 * @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 is the index of the value in the `values` array plus 1.
        // Position 0 is used to mean a value is not in the set.
        mapping(bytes32 value => uint256) _positions;
    }

    /**
     * @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._positions[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 cache the value's position to prevent multiple reads from the same storage slot
        uint256 position = set._positions[value];

        if (position != 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 valueIndex = position - 1;
            uint256 lastIndex = set._values.length - 1;

            if (valueIndex != lastIndex) {
                bytes32 lastValue = set._values[lastIndex];

                // Move the lastValue to the index where the value to delete is
                set._values[valueIndex] = lastValue;
                // Update the tracked position of the lastValue (that was just moved)
                set._positions[lastValue] = position;
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the tracked position for the deleted slot
            delete set._positions[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._positions[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: UNLICENSED
pragma solidity 0.8.23;

library Errors {
    /// @notice The operation is not allowed.
    error Forbidden();

    /// @notice Given value is out of safe bounds.
    error UnacceptableValue();

    /// @notice Given reference is `address(0)`.
    error UnacceptableReference();

    /// @notice The caller account is not authorized to perform an operation.
    /// @param account Address of the account.
    error Unauthorized(address account);

    /// @notice The caller account is not authorized to perform an operation.
    /// @param account Address of the account.
    error AccountMismatch(address account);

    /// @notice Denominators cannot equal zero because division by zero is not allowed.
    error DenominatorZero();
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @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 v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 */
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 v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC2981.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../utils/introspection/IERC165.sol";

/**
 * @dev Interface for the NFT Royalty Standard.
 *
 * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
 * support for royalty payments across all NFT marketplaces and ecosystem participants.
 */
interface IERC2981 is IERC165 {
    /**
     * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
     * exchange. The royalty amount is denominated and should be paid in that same unit of exchange.
     */
    function royaltyInfo(
        uint256 tokenId,
        uint256 salePrice
    ) external view returns (address receiver, uint256 royaltyAmount);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon
     *   a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or
     *   {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon
     *   a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the address zero.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.20;

import {IERC721} from "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.23;

interface IVestFeeCollectorProvider {
    /// @notice Returns the fee collector address.
    function getFeeCollector() external view returns (address);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.23;

import { IERC721 } from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import { IERC2981 } from "@openzeppelin/contracts/interfaces/IERC2981.sol";
import { IERC721Enumerable } from "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";

/**
 * @title IVestMembership
 * @author
 * @notice
 */
interface IVestMembership is IERC2981, IERC721, IERC721Enumerable {
    struct Usage {
        uint256 max;
        uint256 current;
    }

    struct Metadata {
        address token;
        string color;
        string description;
    }

    struct Attributes {
        uint256 price;
        uint256 allocation;
        uint256 claimbackPeriod;
        uint32 tgeNumerator;
        uint32 tgeDenominator;
        uint32 cliffDuration;
        uint32 cliffNumerator;
        uint32 cliffDenominator;
        uint32 vestingPeriodCount;
        uint32 vestingPeriodDuration;
        uint8 tradeable;
    }

    /// @notice Creates new membership and transfers it to given owner.
    /// @param owner_ Address of new address owner.
    /// @param roundId Id of the assigned round.
    /// @param maxUsage Max usage of the new membership.
    /// @param attributes Attributes attached to the membership.
    function mint(address owner_, uint256 roundId, uint256 currentUsage, uint256 maxUsage, Attributes memory attributes)
        external
        returns (uint256);

    /// @notice Extends the membership maximum usage.
    /// @param publicId Id of the membership.
    /// @param amount The amount by which the maximum usage is to be increased.
    function extend(uint256 publicId, uint256 amount) external returns (uint256 newId);

    /// @notice Reduces the membership maximum usage.
    /// @param publicId Id of the membership.
    /// @param amount The amount by which the maximum usage is to be reduced.
    function reduce(uint256 publicId, uint256 amount) external returns (uint256 newId);

    /// @notice Increases the membership current usage.
    /// @param publicId Id of the membership.
    /// @param amount The amount by which the current usage is to be increased.
    function consume(uint256 publicId, uint256 amount) external returns (uint256 newId);

    /// @notice Returns the start timestamp.
    function getStartTimestamp() external view returns (uint256);

    /// @notice Returns the usage by given membership id.
    /// @param publicId Id of the membership.
    function getUsage(uint256 publicId) external view returns (Usage memory);

    /// @notice Returns the round by given membership id.
    /// @param publicId Id of the membership.
    function getRoundId(uint256 publicId) external view returns (uint256);

    /// @notice Returns the attributes by given membership id.
    /// @param publicId Id of the membership.
    function getAttributes(uint256 publicId) external view returns (Attributes memory);

    /// @notice Returns releasable amount in the given timestamp.
    /// @param publicId Id of the membership.
    function unlocked(uint256 publicId) external view returns (uint256);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.23;

interface IVestPresaleScheduler {
    /// @notice Returns the TGE timestamp.
    function getTgeTimestamp() external view returns (uint256);

    /// @notice Returns the listing timestamp.
    function getListingTimestamp() external view returns (uint256);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.23;

interface IWETH {
    function deposit() external payable;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Muldiv operation overflow.
     */
    error MathOverflowedMulDiv();

    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @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 towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            return a / b;
        }

        // (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 = x * y; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                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.
            if (denominator <= prod1) {
                revert MathOverflowedMulDiv();
            }

            ///////////////////////////////////////////////
            // 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.

            uint256 twos = denominator & (0 - denominator);
            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 (unsignedRoundsUp(rounding) && 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
     * towards zero.
     *
     * 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 + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * 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 + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10 of a positive value rounded towards zero.
     * 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 + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * 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 + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);
        }
    }

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.23;

/**
 * @title MathHelper
 * @notice A utility library for performing mathematical operations on values.
 */
library MathHelper {
    /// @notice Returns a smaller number.
    /// @param a Number to compare.
    /// @param b Number to compare.
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? b : a;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.23;

import { Strings } from "@openzeppelin/contracts/utils/Strings.sol";

/**
 * @title MembershipSVG
 * @notice A library for generating the membership SVG.
 */
library MembershipSVG {
    using Strings for uint256;

    struct Params {
        string color;
        string title;
        uint256 max;
        uint256 current;
    }

    string internal constant ELEMENT_OPENING =
        '<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 1500 1500" style="enable-background:new 0 0 1500 1500;" xml:space="preserve">';

    string internal constant ELEMENT_CLOSING = "</svg>";

    string internal constant BACKGROUND =
        '<rect fill="#1c242c" width="1500" height="1500"/><path fill="#20262F" d="M479.2,371.4h-51.6v31.2l-31.2-31.2h-31.5l62.7,62.7v547.2L217.1,771v-51.2l203.3,203.3v-31.5l-182-182v-51.2l182,182V809L49.2,437.8v31.6l94.6,94.6v51.2l-94.6-94.6v31.5l94.6,94.6v51.2l-57.7-57.7v31.5l57.7,57.7v51.3L49.2,686v31.5l94.6,94.6v51.2l-94.6-94.6v31.5l323,323.1H321L49.2,851.4v31.5l94.6,94.6v51.2l94.6,94.7v31.5l-94.6-94.6v51.2l-94.6-94.6v31.5l234.4,234.4h31.5l-25.5-25.5h133.9l3.9,3.9l21.7,21.7h31.5l-41.3-41.3l25.6-25.6l66.9,66.9h31.3l-82.6-82.6l25.6-25.6L614.4,1283h31.5l-124-124V776.9l122.8,122.8l66.4-66.4V603.6L479.2,371.4z M282.6,950.8l144.9,144.9v27.5h-23.7L282.6,1002V950.8L282.6,950.8zM427.6,1013.1v51.2L238.4,875v-51.2L427.6,1013.1z M522,611.4l65.5,65.5v51.2L522,662.5V611.4z M552.2,558.8l131,130.8v51.2L552.2,610V558.8z M522,445.9l94.6,94.6v51.2L522,497.1V445.9z M232.6,1282.9L49.2,1099.5v31.5l94.6,94.6l57.3,57.3H232.6zM529.2,1114.7l168,168h14v-17.5l-182-182V1114.7z M711.2,1131.4v-31.5l-182-182v31.5L711.2,1131.4z M659,1161.8v-31.5l-129.7-129.7v31.5L659,1161.8z M529.2,866.6l182,182v-31.5l-182-182V866.6z M65.5,371.4H49.2v15.2l371.2,371.2v-31.6L65.5,371.4z M118.3,1282.9l31.6,0.1L49.2,1182.3v31.5L118.3,1282.9L118.3,1282.9z M711.2,469.7v-31.5l-66.8-66.8H613L711.2,469.7L711.2,469.7z M616.6,426.3l-55-55h-31.5l86.4,86.4l94.6,94.6v-31.5L616.6,426.3z M711.2,371.4h-15.6l15.6,15.6V371.4z M230.9,371.4h-31.5l220.9,220.9v-31.5L230.9,371.4z M313.6,371.4h-31.5l138.3,138.2v-31.5L313.6,371.4z M233.8,488.4L420.4,675v-31.5L265.3,488.4H233.8z"/>';

    string internal constant LOGO =
        '<circle style="fill:none;stroke-miterlimit:10;" cx="415.6" cy="856.3" r="69.4"/><path style="fill:none;stroke-miterlimit:10;" d="M374,607.5c77.6-12.9,160.1,10.6,220,70.5c37.6,37.6,60.9,84.2,69.8,132.8l-39.1,4.8l-117.6,14.3c-4.3-15-12.4-29.1-24.1-40.9c-20.2-20.2-47.2-29.4-73.6-27.7l-26.5-115.4L374,607.5z"/><path style="fill:none;stroke-miterlimit:10;" d="M265,705.7c25.5-25.5,55.9-43.2,88.1-53.1l26.6,115.4c-11.4,4.6-22.1,11.6-31.4,20.9c-9.3,9.3-16.3,20.1-20.9,31.6l-115.5-26.3C221.7,761.8,239.4,731.3,265,705.7z"/><path style="fill:none;stroke-miterlimit:10;" d="M482.9,923.6c17.6-17.6,26.9-40.5,27.8-63.6l117.6-14.3c2.8,58-17.9,116.9-62.1,161.1c-47.5,47.5-112,67.9-174,61.1l21.4-116.5C438.7,952,463.9,942.7,482.9,923.6z"/><path style="fill:none;stroke-miterlimit:10;" d="M166.7,815.1l38.4,8.8l115.5,26.4c-1.7,26.3,7.6,53.3,27.7,73.4c10.3,10.3,22.5,17.8,35.4,22.4l-21.4,116.5l-7.1,38.7c-43.2-10.6-84.2-32.8-117.9-66.6C177.5,974.9,154,892.6,166.7,815.1z"/><line style="fill:none;stroke-miterlimit:10;" x1="644.9" y1="813.1" x2="660.9" y2="797.1"/><line style="fill:none;stroke-miterlimit:10;" x1="612.1" y1="817.1" x2="654.4" y2="774.8"/><line style="fill:none;stroke-miterlimit:10;" x1="579.3" y1="821" x2="646.3" y2="754.1"/><line style="fill:none;stroke-miterlimit:10;" x1="546.5" y1="825" x2="636.7" y2="734.8"/><line style="fill:none;stroke-miterlimit:10;" x1="513.7" y1="829" x2="625.9" y2="716.8"/><line style="fill:none;stroke-miterlimit:10;" x1="500.6" y1="813.3" x2="613.7" y2="700.1"/><line style="fill:none;stroke-miterlimit:10;" x1="489.2" y1="795.9" x2="600.4" y2="684.6"/><line style="fill:none;stroke-miterlimit:10;" x1="474.6" y1="781.6" x2="586" y2="670.3"/><line style="fill:none;stroke-miterlimit:10;" x1="456.9" y1="770.5" x2="570.4" y2="657.1"/><line style="fill:none;stroke-miterlimit:10;" x1="435.4" y1="763.2" x2="553.5" y2="645.1"/><line style="fill:none;stroke-miterlimit:10;" x1="409.2" y1="760.5" x2="535.5" y2="634.3"/><line style="fill:none;stroke-miterlimit:10;" x1="403.8" y1="737.1" x2="516.1" y2="624.9"/><line style="fill:none;stroke-miterlimit:10;" x1="398.4" y1="713.7" x2="495.2" y2="616.9"/><line style="fill:none;stroke-miterlimit:10;" x1="393.1" y1="690.2" x2="472.7" y2="610.6"/><line style="fill:none;stroke-miterlimit:10;" x1="387.7" y1="666.8" x2="448.3" y2="606.2"/><line style="fill:none;stroke-miterlimit:10;" x1="382.3" y1="643.4" x2="421.5" y2="604.1"/><line style="fill:none;stroke-miterlimit:10;" x1="376.9" y1="619.9" x2="391.6" y2="605.2"/>';

    string internal constant DECORATORS =
        '<path style="fill:none;stroke:#383838;stroke-width:2;stroke-miterlimit:10;stroke-dasharray:4.0182,10.0455;" d="M799.2,1357c-13.1-21.2-20.8-47.4-20.8-75.6c0-20.8,4.2-40.4,11.6-57.8"/><polygon style="fill:#FFFFFF;" points="92.9,78.2 72.6,97.5 72.6,139.5 81.4,148.2 135.1,148.2 144.8,158 144.8,254.2 138.5,247.8 138.5,173.8 133,179.3 133,246.1 133,261.5 212.7,341.3 267.8,341.3 338,411.7 262.6,411.7 297.7,446.8 278.9,446.8 233.2,401.1 196.1,401.1 62.8,267.8 62.8,211.9 73.4,201.5 115.6,201.5 102,187.9 63.4,187.9 63.4,94.3 81,78.2 "/><polyline style="fill:none;stroke:#FFFFFF;stroke-miterlimit:10;" points="280.3,446.3 716.9,446.3 755.4,407.8 973.2,407.8 "/><circle style="fill:none;stroke:#FFFFFF;stroke-miterlimit:10;" cx="978" cy="407.8" r="4.8"/><circle style="fill:none;stroke:#FFFFFF;stroke-miterlimit:10;" cx="674.8" cy="65.7" r="4.8"/><polyline style="fill:none;stroke:#FFFFFF;stroke-miterlimit:10;" points="69.8,100.3 105.2,66.4 280.3,66.4 305.4,91.5 649,91.5 671.6,69 "/><path style="fill:#FFFFFF;" d="M1408.7,290.1L1209.4,90.8l-28.5-0.2L1380.3,290h28.4L1408.7,290.1L1408.7,290.1z M1387.1,299.7h-12.2l-186.8-186.8h-34.7L1110.5,70h-17.7l32.9,32.9h-70.5l65.7,66h51.5l74.7,74.7V258l135.1,135.1h55.5l13.6-13.6V364L1387.1,299.7z"/>';

    /// @notice Generate the svg markup.
    /// @param params Params with the svg configuration.
    function generate(Params memory params) internal pure returns (string memory) {
        uint256 percentage = params.max > 0 ? params.current * 100 / params.max : 0;

        uint256 progress = 10000 - (percentage * 100);

        return string.concat(
            ELEMENT_OPENING,
            BACKGROUND,
            cards(params.color, 100 - percentage),
            elements(params.color, progress),
            DECORATORS,
            labels(params.title, params.max, params.current),
            ELEMENT_CLOSING
        );
    }

    /// @notice Generate the cards markup.
    /// @param color Color of the elements.
    /// @param percentage Percentage value to print.
    function cards(string memory color, uint256 percentage) internal pure returns (string memory) {
        return string.concat(
            string.concat('<g fill="', color, '">'),
            '<path d="M1343.7,522.3v-10.9l-24.9-24.9h-13.6l-3.3,3.1h-195.7l-18.6,18.6h-12.8l-3.5,3.1h-87.6l-2.9-2.9h-35.9l-2.9,2.9H829l-3.1-3.1h-9.1l-24.2,24.2v11.2l3,3v64.3l-3.1-2.5v4.9l3.1,2.6v6.4l-3.1-2.5v4.9l3.1,2.6v6.4l-3.1-2.5v4.9l3.1,2.6v61l-3.1-5.6V715l24.3,24.3h24.9l-3.3-3.1h175.8l-3.1,3.1h11.1l22.5,22.5h6.5l-3.3-3.1h248.4l9.8-9.8h4.4l13.1-13.1v-78.6l20.2-20.2v-23.9l-3.1-3.3v-84L1343.7,522.3z M1295.2,756.3H1047l-22.5-22.5H819.2l-21-21v-178l21-21h270.7l21.7-21.7h204.7l21.6,21.6v121.1l-20.2,20.2v78.6L1295.2,756.3z"/>',
            '<path d="M1343.7,848.9V838l-24.9-24.9h-13.6l-3.3,3.1h-195.7l-18.6,18.6h-12.8l-3.5,3.1h-87.6l-2.9-2.9h-35.9l-2.9,2.9H829l-3.1-3.1h-9.1L792.6,859v11.2l3,3v64.3l-3.1-2.5v4.9l3.1,2.6v6.4l-3.1-2.5v4.9l3.1,2.6v6.4l-3.1-2.5v4.9l3.1,2.6v61l-3.1-5.6v20.9l24.3,24.3h24.9l-3.3-3.1h175.8l-3.1,3.1h11.1l22.5,22.5h6.5l-3.3-3.1h248.4l9.8-9.8h4.4l13.1-13.1v-78.6l20.2-20.2v-23.9l-3.1-3.3v-84L1343.7,848.9z M1295.2,1082.9H1047l-22.5-22.5H819.2l-21-21v-178l21-21h270.7l21.7-21.7h204.7l21.6,21.6v121.1l-20.2,20.2v78.6L1295.2,1082.9z"/>',
            '<path d="M1337.8,1279.1L1337.8,1279.1c-2,0-3.7-1.6-3.7-3.7l0,0c0-2,1.6-3.7,3.7-3.7l0,0c2,0,3.7,1.6,3.7,3.7l0,0C1341.5,1277.5,1339.8,1279.1,1337.8,1279.1z"/>',
            '<text transform="matrix(1 0 0 1 1066.4193 1071.1001)" style="font-size:28px; text-transform:uppercase; font-family:Futura,Arial,monospace; font-weight: 900">claimed</text>',
            '<text transform="matrix(1 0 0 1 1057.7942 744.2)" style="font-size:28px; text-transform:uppercase; font-family:Futura,Arial,monospace; font-weight: 900">purchased</text>',
            string.concat(
                '<text transform="matrix(1 0 0 1 1066.1456 1290.5452)" style="font-size:28px; text-transform:uppercase; font-family:Futura,Arial,monospace; font-weight: 900">',
                percentage.toString(),
                "% left</text>"
            ),
            "</g>"
        );
    }

    /// @notice Generate the elements markup.
    /// @param color Color of the elements.
    /// @param progress Progress value to print.
    function elements(string memory color, uint256 progress) internal pure returns (string memory) {
        return string.concat(
            string.concat('<g stroke="', color, '">'),
            '<path style="fill:none;stroke-width:2;stroke-miterlimit:10;" d="M999.4,1354.6c-21.1,25.2-52.8,41.1-88.2,41.1c-63.5,0-115.1-51.6-115.1-115.1s51.6-115.1,115.1-115.1c8,0,15.7,0.8,23.2,2.4"/>',
            '<path style="fill:none;stroke-width:2;stroke-miterlimit:10;" d="M954.2,1396.8c-57.4,21.3-123.2-2.8-152.5-58.4c-4-7.6-7.1-15.3-9.4-23.2"/>',
            '<path style="fill:none;stroke-width:2;stroke-miterlimit:10;" d="M991,1186c11.9,10,22,22.4,29.8,36.9c14.7,28,17.7,59.1,10.6,87.7"/>',
            '<path style="fill:none;stroke-width:2;stroke-miterlimit:10;" d="M1337.8,1285.2L1337.8,1285.2c-5.4,0-9.8-4.4-9.8-9.8l0,0c0-5.4,4.4-9.8,9.8-9.8l0,0c5.4,0,9.8,4.4,9.8,9.8l0,0C1347.6,1280.8,1343.2,1285.2,1337.8,1285.2z"/>',
            '<polyline style="fill:none;stroke-width:2;stroke-miterlimit:10;" points="991,1363.6 1022.7,1395.2 1305.8,1395.2 1337.8,1363.2 1337.8,1275.4 "/>',
            '<path style="fill:none;stroke-width:2;stroke-miterlimit:10;stroke-dasharray:6.1193,6.1193;" d="M943.5,1170.1c47.9,13.9,82.9,58.1,82.9,110.5c0,26-8.6,49.9-23.1,69.2"/>',
            '<path style="fill:none;stroke-width:2;stroke-miterlimit:10;stroke-dasharray:6.0368,6.0368;" d="M861.9,1167.2c22.5-9.8,46.7-12.4,69.6-8.6"/>',
            '<circle cx="911.3" cy="1280.6" r="84.8" style="fill:none;stroke:#393E4A;stroke-width:28;stroke-miterlimit:10;"/>',
            string.concat(
                '<circle cx="911.3" cy="1280.6" r="84.8" style="fill:none;stroke-width:28;stroke-miterlimit:10;" pathLength="10000" stroke-dasharray="10000" stroke-dashoffset="',
                progress.toString(),
                '" transform="rotate(-90)" transform-origin="911.3 1280.6"/>'
            ),
            LOGO,
            "</g>"
        );
    }

    /// @notice Generate the labels markup.
    /// @param title Label to print.
    /// @param max Value to print.
    /// @param current Value to print.
    function labels(string memory title, uint256 max, uint256 current) internal pure returns (string memory) {
        return string.concat(
            string.concat(
                '<text transform="matrix(1 0 0 1 209.3455 270.9893)" style="fill:#FFFFFF; font-family:Futura,Arial,monospace; font-weight: 900;" font-size="55px">',
                title,
                "</text>"
            ),
            string.concat(
                '<text transform="matrix(1 0 0 1 872.9004 644.1)" style="fill:#FFFFFF; font-family:Futura,Arial,monospace; font-weight: 900;" font-size="50px">',
                max.toString(),
                "</text>"
            ),
            string.concat(
                '<text transform="matrix(1 0 0 1 872.9005 966.0894)" style="fill:#FFFFFF; font-family:Futura,Arial,monospace; font-weight: 900;" font-size="50px">',
                current.toString(),
                "</text>"
            )
        );
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.20;

/**
 * @dev These functions deal with verification of Merkle Tree proofs.
 *
 * The tree and the proofs can be generated using our
 * https://github.com/OpenZeppelin/merkle-tree[JavaScript library].
 * You will find a quickstart guide in the readme.
 *
 * WARNING: You should avoid using leaf values that are 64 bytes long prior to
 * hashing, or use a hash function other than keccak256 for hashing leaves.
 * This is because the concatenation of a sorted pair of internal nodes in
 * the Merkle tree could be reinterpreted as a leaf value.
 * OpenZeppelin's JavaScript library generates Merkle trees that are safe
 * against this attack out of the box.
 */
library MerkleProof {
    /**
     *@dev The multiproof provided is not valid.
     */
    error MerkleProofInvalidMultiproof();

    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Calldata version of {verify}
     */
    function verifyCalldata(bytes32[] calldata proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        return processProofCalldata(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Calldata version of {processProof}
     */
    function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if the `leaves` can be simultaneously proven to be a part of a Merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details.
     */
    function multiProofVerify(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProof(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Calldata version of {multiProofVerify}
     *
     * CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details.
     */
    function multiProofVerifyCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProofCalldata(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction
     * proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another
     * leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false
     * respectively.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree
     * is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the
     * tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer).
     */
    function processMultiProof(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the Merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 proofLen = proof.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        if (leavesLen + proofLen != totalHashes + 1) {
            revert MerkleProofInvalidMultiproof();
        }

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value from the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i]
                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])
                : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            if (proofPos != proofLen) {
                revert MerkleProofInvalidMultiproof();
            }
            unchecked {
                return hashes[totalHashes - 1];
            }
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Calldata version of {processMultiProof}.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details.
     */
    function processMultiProofCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the Merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 proofLen = proof.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        if (leavesLen + proofLen != totalHashes + 1) {
            revert MerkleProofInvalidMultiproof();
        }

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value from the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i]
                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])
                : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            if (proofPos != proofLen) {
                revert MerkleProofInvalidMultiproof();
            }
            unchecked {
                return hashes[totalHashes - 1];
            }
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Sorts the pair (a, b) and hashes the result.
     */
    function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {
        return a < b ? _efficientHash(a, b) : _efficientHash(b, a);
    }

    /**
     * @dev Implementation of keccak256(abi.encode(a, b)) that doesn't allocate or expand memory.
     */
    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.23;

enum RoundState {
    PENDING,
    SALE,
    VESTING
}

struct Round {
    string name;
    uint256 startTimestamp;
    uint256 endTimestamp;
    bytes32 whitelistRoot;
    string proofsUri;
    bytes attributes;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC20Permit} from "../extensions/IERC20Permit.sol";
import {Address} from "../../../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 An operation with an ERC20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @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.encodeCall(token.transfer, (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.encodeCall(token.transferFrom, (from, to, 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);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @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.encodeCall(token.approve, (spender, value));

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

    /**
     * @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);
        if (returndata.length != 0 && !abi.decode(returndata, (bool))) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @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(token).code.length > 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.20;

/**
 * @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 v5.0.0) (utils/Strings.sol)

pragma solidity ^0.8.20;

import {Math} from "./math/Math.sol";
import {SignedMath} from "./math/SignedMath.sol";

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

    /**
     * @dev The `value` string doesn't fit in the specified `length`.
     */
    error StringsInsufficientHexLength(uint256 value, uint256 length);

    /**
     * @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), HEX_DIGITS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toStringSigned(int256 value) internal pure returns (string memory) {
        return string.concat(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) {
        uint256 localValue = value;
        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] = HEX_DIGITS[localValue & 0xf];
            localValue >>= 4;
        }
        if (localValue != 0) {
            revert StringsInsufficientHexLength(value, length);
        }
        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 bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.23;

import { Base64 } from "@openzeppelin/contracts/utils/Base64.sol";
import { Strings } from "@openzeppelin/contracts/utils/Strings.sol";
import { IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";

import { IVestMembership } from "src/IVestMembership.sol";
import { MembershipSVG } from "src/libraries/MembershipSVG.sol";

interface IVestMembershipDescriptor {
    /// @notice Generates the name of the membership.
    /// @param metadata Metadata of the membership.
    function name(IVestMembership.Metadata memory metadata) external view returns (string memory);

    /// @notice Generates the symbol of the membership.
    /// @param metadata Metadata of the membership.
    function symbol(IVestMembership.Metadata memory metadata) external view returns (string memory);

    /// @notice Generates encoded JSON metadata.
    /// @param start Date of the start.
    /// @param usage Usage of the membership.
    /// @param metadata Metadata of the membership.
    /// @param attributes Attributes of the membership.
    /// @return encoded JSON metadata in base64.
    function tokenURI(
        uint256 start,
        IVestMembership.Usage memory usage,
        IVestMembership.Metadata memory metadata,
        IVestMembership.Attributes memory attributes
    ) external view returns (string memory);
}

contract VestMembershipDescriptor is IVestMembershipDescriptor {
    using Strings for address;
    using Strings for uint32;
    using Strings for uint256;

    /// @inheritdoc IVestMembershipDescriptor
    function name(IVestMembership.Metadata memory metadata) public view returns (string memory) {
        string memory name_ = IERC20Metadata(address(metadata.token)).name();

        return string.concat(name_, " Vesting");
    }

    /// @inheritdoc IVestMembershipDescriptor
    function symbol(IVestMembership.Metadata memory metadata) public view returns (string memory) {
        string memory symbol_ = IERC20Metadata(address(metadata.token)).symbol();

        return string.concat("v", symbol_);
    }

    /// @inheritdoc IVestMembershipDescriptor
    function tokenURI(
        uint256 start,
        IVestMembership.Usage memory usage,
        IVestMembership.Metadata memory metadata,
        IVestMembership.Attributes memory attributes
    ) public view virtual returns (string memory) {
        string memory json = string.concat(
            '{"attributes":',
            _traits(start, usage, metadata, attributes),
            ',"description":"',
            metadata.description,
            '","name":"',
            _title(metadata),
            '","image":"',
            _image(usage, metadata),
            '"}'
        );

        return string.concat("data:application/json;base64,", Base64.encode(bytes(json)));
    }

    /// @notice Generates title for given membership.
    /// @param metadata Metadata of the membership.
    function _title(IVestMembership.Metadata memory metadata) internal view returns (string memory) {
        string memory symbol_ = IERC20Metadata(address(metadata.token)).symbol();

        return string.concat("Vesting of ", symbol_);
    }

    /// @notice Generates encoded image.
    /// @param usage Usage of the membership.
    /// @param metadata Metadata of the membership.
    /// @return encoded image.
    function _image(IVestMembership.Usage memory usage, IVestMembership.Metadata memory metadata)
        internal
        view
        returns (string memory)
    {
        uint256 denominator = 10 ** IERC20Metadata(address(metadata.token)).decimals();

        string memory svg = MembershipSVG.generate(
            MembershipSVG.Params({
                color: metadata.color,
                title: name(metadata),
                max: usage.max / denominator,
                current: usage.current / denominator
            })
        );

        return string.concat("data:image/svg+xml;base64,", Base64.encode(bytes(svg)));
    }

    /// @notice Generates traits metadata.
    /// @param start Date of the start.
    /// @param usage Usage of the membership.
    /// @param metadata Metadata of the membership.
    /// @return encoded image.
    function _traits(
        uint256 start,
        IVestMembership.Usage memory usage,
        IVestMembership.Metadata memory metadata,
        IVestMembership.Attributes memory attributes
    ) internal view returns (string memory) {
        uint256 denominator = 10 ** IERC20Metadata(address(metadata.token)).decimals();

        string memory traits0 = string.concat(
            '[{"trait_type":"Usage","display_type":"boost_percentage","value":',
            (usage.max > 0 ? usage.current * 100 / usage.max : 0).toString(),
            '},{"trait_type":"Vested tokens","display_type":"number","value":',
            Strings.toString(usage.max / denominator),
            '},{"trait_type":"Claimed tokens","display_type":"number","value":',
            Strings.toString(usage.current / denominator),
            '},{"trait_type":"TGE","display_type":"boost_percentage","value":',
            (attributes.tgeDenominator > 0 ? attributes.tgeNumerator * 100 / attributes.tgeDenominator : 0).toString(),
            '},{"trait_type":"Vesting start","display_type":"date","value":',
            start.toString(),
            '},{"trait_type":"Vesting end","display_type":"date","value":',
            (start + attributes.cliffDuration + (attributes.vestingPeriodCount * attributes.vestingPeriodDuration))
                .toString()
        );

        /// @dev split to avoid the stack too deep error
        string memory traits1 = string.concat(
            '},{"trait_type":"Cliff duration","value":"',
            _getCliffDurationText(attributes.cliffDuration),
            '"},{"trait_type":"Cliff unlock","display_type":"boost_percentage","value":',
            (attributes.cliffDenominator > 0 ? attributes.cliffNumerator * 100 / attributes.cliffDenominator : 0)
                .toString(),
            '},{"trait_type":"Unlock frequency","value":"',
            _getUnlockFrequencyText(attributes.vestingPeriodDuration),
            '"},{"trait_type":"Vested token name","value":"',
            IERC20Metadata(address(metadata.token)).name(),
            '"},{"trait_type":"Vested token symbol","value":"',
            IERC20Metadata(address(metadata.token)).symbol(),
            '"},{"trait_type":"Vested token address","value":"',
            Strings.toHexString(uint160(metadata.token), 20),
            '"}]'
        );

        return string.concat(traits0, traits1);
    }

    /// @notice Convert the cliff duration to human-readable value.
    /// @param value Value of the cliff duration.
    /// @return Human-readable value.
    function _getCliffDurationText(uint256 value) internal pure virtual returns (string memory) {
        if (value == 0) return "no cliff";

        (uint256 period, string memory label) = _humanize(value);

        return string.concat(period.toString(), " ", label);
    }

    /// @notice Convert the unlock frequency to human-readable value.
    /// @param value Value of the unlock frequency.
    /// @return Human-readable value.
    function _getUnlockFrequencyText(uint256 value) internal pure virtual returns (string memory) {
        if (value == 0) return "none";

        (uint256 period, string memory label) = _humanize(value);

        if (period == 1) return string.concat("every ", label);

        return string.concat("every ", period.toString(), " ", label);
    }

    /// @notice Convert the period to a human-readable value.
    /// @param value Period to humanize.
    /// @return Period in as text value.
    function _humanize(uint256 value) internal pure virtual returns (uint256, string memory) {
        if (value < 1 hours) return _pluralize(value / 1 minutes, "minute", "minutes");

        if (value < 1 days) return _pluralize(value / 1 hours, "hour", "hours");

        return _pluralize(value / 1 days, "day", "days");
    }

    /// @notice Returns a label based on the given value.
    /// @param value The value on which the selection of the label is based.
    /// @param singular Singular label.
    /// @param plural Plural label.
    /// @return Generated label.
    function _pluralize(uint256 value, string memory singular, string memory plural)
        internal
        pure
        virtual
        returns (uint256, string memory)
    {
        return (value, value == 1 ? singular : plural);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.23;

import { Context } from "@openzeppelin/contracts/utils/Context.sol";
import { IERC20 } from "@openzeppelin/contracts/interfaces/IERC20.sol";
import { EnumerableSet } from "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import { MerkleProof } from "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";

import { Withdrawable } from "delegatecall/Withdrawable.sol";

import { Errors } from "src/libraries/Errors.sol";
import { MathHelper } from "src/libraries/MathHelper.sol";
import { ERC20Helper } from "src/libraries/ERC20Helper.sol";
import { Round, RoundState } from "src/types/Round.sol";
import { Presale } from "src/types/Configuration.sol";
import { IVestMembership } from "src/IVestMembership.sol";
import { IVestPresaleScheduler } from "src/IVestPresaleScheduler.sol";
import { IVestFeeCollectorProvider } from "src/IVestFeeCollectorProvider.sol";

/**
 * @title VestPresale
 * @notice An implementation of smart contract to handle the process of presale and vesting.
 */
contract VestPresale is Context, Withdrawable, IVestPresaleScheduler {
    using EnumerableSet for EnumerableSet.UintSet;

    uint256 internal constant ROUND_LOCK_PERIOD = 1 hours;

    /// @notice ERC20 implementation of the token sold.
    IERC20 public immutable tokenA;

    /// @notice ERC20 implementation of the token collected.
    IERC20 public immutable tokenB;

    /// @notice An address of a external membership smart contract.
    IVestMembership public immutable membership;

    /// @notice An address of a external smart contract that provide the fee collector address.
    IVestFeeCollectorProvider public immutable feeCollectorProvider;

    /// @notice Address of the manager.
    address public manager;

    /// @notice Address of the beneficiary.
    address public beneficiary;

    /// @notice Amount of tokens available to distribution during the vesting.
    uint256 public liquidityA;

    /// @notice Amount of tokens collected during the sale.
    uint256 public liquidityB;

    /// @notice Amount of tokens collected during the sale that are available to withdraw.
    uint256 public nonClaimableBackTokenB;

    /// @notice Timestamp indicating when the tge should be available.
    uint256 internal tgeTimestamp;

    /// @notice Timestamp indicating starting point from which the claim back period begins.
    uint256 internal listingTimestamp;

    /// @notice How much time in seconds since `listingTimestamp` do Users have to claimback TokenA
    uint256 public immutable claimbackPeriod;

    /// @notice Indicates whether the account participated in the sale state of given round.
    mapping(uint256 roundId => mapping(bytes32 => bool)) public roundParticipants;

    /// @notice Incremental value for indexing rounds.
    uint256 internal roundSerialId;

    /// @notice Fees applicable to this presale
    Presale.Fees internal fees;

    /// @notice List of rounds ids.
    EnumerableSet.UintSet internal roundsIds;

    /// @notice Collection of the rounds.
    mapping(uint256 roundId => Round round) internal rounds;

    /// @notice Event emitted when the funds has been claimed.
    /// @param vMembershipId Id of the membership.
    /// @param amountA Amount of the claimed funds.
    event Claimed(uint256 indexed vMembershipId, uint256 amountA);

    /// @notice Event emitted when the funds has been claimed back.
    /// @param vMembershipId Id of the membership.
    /// @param amountA Amount of the claimed back funds.
    event ClaimedBack(uint256 indexed vMembershipId, uint256 amountA);

    /// @notice Event emitted when the funds has been deposited.
    /// @param amount Amount of the deposited funds.
    event DepositedA(uint256 amount);

    /// @notice Event emitted when the funds has been withdrawn.
    /// @param amount Amount of the withdrawn funds.
    event WithdrawnA(uint256 amount);

    /// @notice Event emitted when the funds has been withdrawn.
    /// @param amount Amount of the withdrawn funds.
    event WithdrawnB(uint256 amount);

    /// @notice Event emitted when the round has been updated.
    event RoundUpdated(uint256 indexed id);

    /// @notice Event emitted when the manager has been updated.
    event ManagerUpdated(address current);

    /// @notice Event emitted when the beneficiary has been updated.
    event BeneficiaryUpdated(address current);

    /// @notice Event emitted when the tge start timestamp has been updated.
    /// @param timestamp The new timestamp.
    event ListingTimestampUpdated(uint256 timestamp);

    /// @notice Event emitted when the tge listing difference timestamp has been updated.
    /// @param value The new value.
    event TgeTimestampUpdated(uint256 value);

    //-------------------------------------------------------------------------
    // Errors

    /// @notice Cannot update the locked round.
    /// @param id Id of the round.
    error RoundIsLocked(uint256 id);

    /// @notice The round with given id does not exist.
    /// @param id Id of the round.
    error RoundNotExists(uint256 id);

    /// @notice Round is in a different state.
    /// @param id The id of updated round.
    /// @param current Current state of the round.
    /// @param expected Expected state of the round.
    error RoundStateMismatch(uint256 id, RoundState current, RoundState expected);

    /// @notice Claim not allowed by given membership.
    /// @param membershipId Id of the membership.
    error ClaimNotAllowed(uint256 membershipId);

    /// @notice Claimback not allowed for given membership.
    /// @param membershipId Id of the membership.
    error ClaimbackNotAllowed(uint256 membershipId);

    /// @notice Cliffs that unblock tokens immediately are not allowed
    error CliffWithImmediateUnlock();

    /// @notice Vesting periods with duration 0 are not allowed
    error VestingWithImmediateUnlock();

    /// @notice Vesting with only one period is too short. Either use cliff or increase period count.
    error CliffLikeVesting();

    /// @notice The vesting is configured such that it would never unlock any tokens.
    error VestingWithoutUnlocks();

    /// @notice Cliff height is specified but no vesting periods follow. In that case, all tokens will be unlocked at cliff end so cliffNumerator should equal zero.
    error CliffHeightWithoutSubsequentUnlocks();

    /// @notice When vesting is configured such that it will never release 100% tokens or it will release more than 100% of tokens.
    error VestingSize();

    /// @notice This protocol does not support tokens with transfer fees
    error TokenWithTransferFees(address tokenAddress);

    /// @notice `LiquidityA` is lower than needed.
    error OutOfLiquidityA();

    /// @notice Given `account` is already a participant in the round.
    error AlreadyRoundParticipant(uint256 roundId, address account);

    /// @notice Ensures that the account is eligible for withdrawal.
    modifier protectedWithdrawal() override {
        if (_msgSender() != manager) revert Errors.Unauthorized(_msgSender());
        _;
    }

    /// @notice Ensure the sender is the manager.
    /// @param account Address of the sender.
    modifier onlyManager(address account) {
        if (account != manager) revert Errors.Unauthorized(account);
        _;
    }

    /// @notice Ensure the sender is the beneficiary.
    /// @param account Address of the sender.
    modifier onlyBeneficiary(address account) {
        if (account != beneficiary) revert Errors.Unauthorized(account);
        _;
    }

    /// @notice Ensure the sender is the owner of the membership.
    /// @param membershipId Id of the membership.
    modifier onlyMember(uint256 membershipId) {
        if (membership.ownerOf(membershipId) != _msgSender()) revert Errors.AccountMismatch(_msgSender());
        _;
    }

    /// @notice Ensures that the selected round has given state.
    /// @param roundId Id of the round.
    /// @param expected Expected state of the round.
    modifier onlyRoundInState(uint256 roundId, RoundState expected) {
        RoundState current = getRoundState(roundId);

        if (current != expected) revert RoundStateMismatch(roundId, current, expected);
        _;
    }

    /// @notice Contract state initialization.
    constructor(
        IVestMembership membership_,
        IVestFeeCollectorProvider feeCollectorProvider_,
        Presale.Configuration memory configuration,
        Round[] memory rounds_
    ) {
        if (address(membership_) == address(0)) revert Errors.UnacceptableReference();
        if (address(feeCollectorProvider_) == address(0)) revert Errors.UnacceptableReference();

        if (address(configuration.tokenA) == address(0)) revert Errors.UnacceptableReference();
        if (address(configuration.tokenB) == address(0)) revert Errors.UnacceptableReference();

        if (configuration.manager == address(0)) revert Errors.UnacceptableReference();
        if (configuration.beneficiary == address(0)) revert Errors.UnacceptableReference();

        if (configuration.listingTimestamp != 0 && configuration.tgeTimestamp == 0) {
            revert Errors.UnacceptableValue();
        }
        if (configuration.listingTimestamp != 0 && configuration.tgeTimestamp > configuration.listingTimestamp) {
            revert Errors.UnacceptableValue();
        }

        // not emitting an event since fees can’t change after being set in a constructor
        fees = configuration.fees;

        tokenB = configuration.tokenB;
        tokenA = configuration.tokenA;

        manager = configuration.manager;
        beneficiary = configuration.beneficiary;

        membership = membership_;
        feeCollectorProvider = feeCollectorProvider_;

        tgeTimestamp = configuration.tgeTimestamp;
        claimbackPeriod = configuration.claimbackPeriod;
        listingTimestamp = configuration.listingTimestamp;

        uint256 size = rounds_.length;
        for (uint256 i = 0; i < size; i++) {
            _addRound(rounds_[i]);
        }
    }

    //--------------------------------------------------------------------------
    // Domain

    function claim(uint256 membershipId) external onlyMember(membershipId) returns (uint256) {
        IVestMembership.Usage memory usage = membership.getUsage(membershipId);

        // when is the first claim
        if (usage.current == 0) {
            uint256 timestamp = block.timestamp;

            // must be after tgeTimestamp
            if (tgeTimestamp == 0 || timestamp < tgeTimestamp) revert ClaimNotAllowed(membershipId);

            IVestMembership.Attributes memory attributes = membership.getAttributes(membershipId);

            if (attributes.price > 0) {
                uint256 denominator = 10 ** ERC20Helper.decimals(tokenA);

                // overflow not possible because `nonClaimableBackTokenB` always less than tokenB total supply.
                unchecked {
                    nonClaimableBackTokenB += usage.max * attributes.price / denominator;
                }
            }
        }

        uint256 releasable = membership.unlocked(membershipId) - usage.current;

        if (releasable == 0) revert ClaimNotAllowed(membershipId);

        uint256 newId = membership.consume(membershipId, releasable);

        ERC20Helper.transfer(tokenA, _msgSender(), releasable);

        emit Claimed(membershipId, releasable);

        return newId;
    }

    /**
     * @notice Transfers `tokenB` tokens and creates the membership.
     *
     * @param roundId Id of the round.
     * @param amountA amount of token A to buy
     *
     * @dev The method should be used if the round has its own configuration for
     * membership - otherwise the call will be reverted during decoding the
     * round attributes.
     */
    function buy(uint256 roundId, uint256 amountA)
        external
        payable
        onlyRoundInState(roundId, RoundState.SALE)
        returns (uint256)
    {
        IVestMembership.Attributes memory attributes =
            abi.decode(rounds[roundId].attributes, (IVestMembership.Attributes));

        _requireCallerCanParticipateInSale(roundId, attributes);

        return _buy(roundId, amountA, attributes);
    }

    /// @notice Transfers `tokenB` tokens and creates the membership.
    /// @param roundId Id of the round.
    /// @param amountA amount of token A to buy
    /// @param attributes The membership attributes.
    /// @param proof Merkle tree proof.
    function buy(
        uint256 roundId,
        uint256 amountA,
        IVestMembership.Attributes memory attributes,
        bytes32[] calldata proof
    ) external payable onlyRoundInState(roundId, RoundState.SALE) returns (uint256) {
        _requireValidAttributes(attributes);

        _requireCallerIsWhitelisted(roundId, attributes, proof);
        _requireCallerCanParticipateInSale(roundId, attributes);

        return _buy(roundId, amountA, attributes);
    }

    /// @notice Transfers `tokenB` tokens and updates usage of the given membership.
    /// @param membershipId Id of the membership.
    /// @param amountA Amount of tokens to extend the membership.
    function extend(uint256 membershipId, uint256 amountA)
        external
        payable
        onlyRoundInState(membership.getRoundId(membershipId), RoundState.SALE)
        onlyMember(membershipId)
        returns (uint256)
    {
        IVestMembership.Usage memory usage = membership.getUsage(membershipId);
        IVestMembership.Attributes memory attributes = membership.getAttributes(membershipId);

        uint256 released = _pay(usage.max, attributes.allocation, attributes.price, amountA);

        if (attributes.price > 0 && usage.current > 0) {
            uint256 denominator = 10 ** ERC20Helper.decimals(tokenA);

            // overflow not possible because `nonClaimableBackTokenB` always less than tokenB total supply.
            unchecked {
                nonClaimableBackTokenB += amountA * attributes.price / denominator;
            }
        }

        return membership.extend(membershipId, released);
    }

    /**
     * @notice Claimback `tokenB` tokens to the membership owner and adds `tokenA` tokens back to the `liquidityA`.
     * @param membershipId Id of the membership.
     * @param amountA Amount of `tokenA` tokens to claimback.
     *
     * Requirements:
     * - the caller must have a membership
     * - the membership `claimbackPeriod` attribute must be greater than zero
     * - when the `listingTimestamp` is different from zero => the current timestamp
     *   must be earlier than the sum of `listingTimestamp` and `period`
     */
    function claimback(uint256 membershipId, uint256 amountA)
        external
        onlyMember(membershipId)
        returns (uint256 newPublicId)
    {
        if (amountA == 0) revert ClaimbackNotAllowed(membershipId);

        IVestMembership.Attributes memory attributes = membership.getAttributes(membershipId);

        if (attributes.claimbackPeriod == 0) revert ClaimbackNotAllowed(membershipId);

        /**
         * The `period` cannot be greater than the `Presale.claimbackPeriod`, as this
         * is related to the `withdrawTokenB` function. The `withdrawTokenB` method allows
         * all `tokenB` funds to be withdrawn after the time for which the
         * `Presale.claimbackPeriod` is used to calculate.
         */
        uint256 period = MathHelper.min(claimbackPeriod, attributes.claimbackPeriod);
        if (listingTimestamp != 0 && block.timestamp >= listingTimestamp + period) {
            revert ClaimbackNotAllowed(membershipId);
        }

        IVestMembership.Usage memory usage = membership.getUsage(membershipId);

        if (usage.current > 0) revert ClaimbackNotAllowed(membershipId);

        uint256 claimableBackA = MathHelper.min(amountA, usage.max);

        // Calculates the number of `tokenB` tokens to be claimed back to the membership owner.
        uint256 denominatorA = 10 ** ERC20Helper.decimals(tokenA);
        uint256 claimableBackB = claimableBackA * attributes.price / denominatorA;

        if (claimableBackB == 0) revert ClaimbackNotAllowed(membershipId);

        unchecked {
            liquidityA += claimableBackA;
            liquidityB -= claimableBackB;
        }

        newPublicId = membership.reduce(membershipId, claimableBackA);
        ERC20Helper.transfer(tokenB, _msgSender(), claimableBackB);

        emit ClaimedBack(membershipId, claimableBackA);
    }

    /// @notice Updates the manager address.
    /// @param value Address of the new manager.
    function updateManager(address value) external onlyManager(_msgSender()) {
        if (value == address(0)) revert Errors.UnacceptableReference();

        manager = value;

        emit ManagerUpdated(value);
    }

    /// @notice Updates the beneficiary address.
    /// @param value Address of the new beneficiary.
    function updateBeneficiary(address value) external onlyBeneficiary(_msgSender()) {
        if (value == address(0)) revert Errors.UnacceptableReference();

        beneficiary = value;

        emit BeneficiaryUpdated(value);
    }

    /// @notice Updates tge timestamp value.
    /// @param timestamp new tge timestamp.
    function updateTgeTimestamp(uint256 timestamp) external onlyBeneficiary(_msgSender()) {
        // The value cannot be in the past.
        if (timestamp < block.timestamp) revert Errors.UnacceptableValue();

        // Cannot set tge timestamp if tge has already passed.
        if (tgeTimestamp != 0 && block.timestamp >= tgeTimestamp) revert Errors.UnacceptableValue();

        // Cannot set tge timestamp to be greater than listing timestamp.
        if (listingTimestamp != 0 && timestamp > listingTimestamp) revert Errors.UnacceptableValue();

        tgeTimestamp = timestamp;

        emit TgeTimestampUpdated(timestamp);
    }

    /// @notice Updates listing timestamp value.
    /// @param timestamp new listing timestamp.
    function updateListingTimestamp(uint256 timestamp) external onlyBeneficiary(_msgSender()) {
        // The value cannot be in the past.
        if (timestamp < block.timestamp) revert Errors.UnacceptableValue();

        // Cannot set listing timestamp to be less than tge timestamp.
        if (tgeTimestamp == 0 || timestamp < tgeTimestamp) revert Errors.UnacceptableValue();

        // Cannot set listing timestamp if listing has already passed.
        if (listingTimestamp != 0 && block.timestamp >= listingTimestamp) revert Errors.UnacceptableValue();

        listingTimestamp = timestamp;

        emit ListingTimestampUpdated(timestamp);
    }

    /// @notice Deposits the `tokenA`.
    /// @param amountA Amount of the tokens to deposit.
    function depositTokenA(uint256 amountA) external {
        uint256 deposited = ERC20Helper.transferFrom(tokenA, _msgSender(), address(this), amountA);

        if (deposited != amountA) revert TokenWithTransferFees(address(tokenA));

        // overflow is not possible because transferred amount cannot be higher than token supply.
        unchecked {
            liquidityA += deposited;
        }

        emit DepositedA(deposited);
    }

    /// @notice Beneficiary can withdraw `tokenA` at any time.
    /// @param amount amount of `tokenA` to withdraw.
    function withdrawTokenA(uint256 amount) external onlyBeneficiary(_msgSender()) {
        if (amount > liquidityA) revert Errors.UnacceptableValue();

        // underflow not possible because we checked before that `amount` < `liquidityA`
        unchecked {
            liquidityA -= amount;
        }

        ERC20Helper.transfer(tokenA, beneficiary, amount);

        emit WithdrawnA(amount);
    }

    /// @notice Withdraws the `tokenB` tokens to the beneficiary.
    function withdrawTokenB() external {
        if (listingTimestamp == 0 && claimbackPeriod != 0) revert Errors.Forbidden();

        uint256 withdrawable = nonClaimableBackTokenB;

        // if claimback timestamp in past beneficiary can get all liquidity.
        if (block.timestamp > listingTimestamp + claimbackPeriod) {
            withdrawable = liquidityB;
        }

        if (withdrawable == 0) revert Errors.Forbidden();

        nonClaimableBackTokenB = 0;
        unchecked {
            liquidityB -= withdrawable;
        }

        uint256 fee;
        Presale.Fees memory fees_ = fees;
        if (fees_.tokenBNumerator != 0 && fees_.tokenBDenominator != 0) {
            // over/underflow not possible here because fee always will be less than `withdrawable` such as percent of fee cannot be higher or equal than 100.
            unchecked {
                fee = (withdrawable * fees_.tokenBNumerator) / fees_.tokenBDenominator;
            }

            if (fee > 0) {
                unchecked {
                    withdrawable -= fee;
                }

                ERC20Helper.transfer(tokenB, getFeeCollector(), fee);
            }
        }

        ERC20Helper.transfer(tokenB, beneficiary, withdrawable);

        emit WithdrawnB(withdrawable + fee);
    }

    /// @notice Adds new round.
    /// @param round Configuration of the round.
    function addRound(Round memory round) external onlyManager(_msgSender()) {
        _addRound(round);
    }

    /// @notice Updates the round.
    /// @param roundId Id of the round.
    /// @param round Configuration of the round.
    function updateRound(uint256 roundId, Round memory round) external onlyManager(_msgSender()) {
        if (round.startTimestamp >= round.endTimestamp) revert Errors.UnacceptableValue();

        if (block.timestamp >= rounds[roundId].startTimestamp - ROUND_LOCK_PERIOD) {
            revert RoundIsLocked(roundId);
        }

        if (round.whitelistRoot != bytes32(0) && round.attributes.length != 0) {
            revert Errors.UnacceptableValue();
        }

        rounds[roundId] = round;

        emit RoundUpdated(roundId);
    }

    /// @notice Removes the round.
    /// @param roundId Id of the round.
    function removeRound(uint256 roundId) external onlyManager(_msgSender()) {
        if (!roundsIds.contains(roundId)) revert RoundNotExists(roundId);

        if (block.timestamp >= rounds[roundId].startTimestamp - ROUND_LOCK_PERIOD) {
            revert RoundIsLocked(roundId);
        }

        roundsIds.remove(roundId);

        emit RoundUpdated(roundId);
    }

    /// @notice Updates the round whitelist configuration.
    /// @param roundId Id of the round.
    /// @param whitelistRoot Merkle tree root.
    /// @param proofsUri The uri of the proofs.
    function updateRoundWhitelist(uint256 roundId, bytes32 whitelistRoot, string memory proofsUri)
        external
        onlyManager(_msgSender())
    {
        if (!roundsIds.contains(roundId)) revert RoundNotExists(roundId);

        rounds[roundId].proofsUri = proofsUri;
        rounds[roundId].whitelistRoot = whitelistRoot;

        emit RoundUpdated(roundId);
    }

    //--------------------------------------------------------------------------
    // Misc

    /// @notice Returns the fees configuration.
    function getFees() external view returns (Presale.Fees memory) {
        return fees;
    }

    /// @notice Returns the list of the rounds and their ids and states.
    function getRounds()
        external
        view
        returns (uint256[] memory ids, Round[] memory rounds_, RoundState[] memory states)
    {
        ids = roundsIds.values();

        uint256 size = ids.length;
        rounds_ = new Round[](size);
        states = new RoundState[](size);
        for (uint256 i = 0; i < size; i++) {
            rounds_[i] = rounds[ids[i]];
            states[i] = getRoundState(ids[i]);
        }

        return (ids, rounds_, states);
    }

    /// @inheritdoc Withdrawable
    function withdrawToken(address to, IERC20 token, uint256 amount) public override protectedWithdrawal {
        if (address(token) == address(tokenA) || address(token) == address(tokenB)) {
            revert Errors.UnacceptableReference();
        }

        super.withdrawToken(to, token, amount);
    }

    /// @notice Returns the round.
    /// @param roundId Id of the round.
    function getRound(uint256 roundId) public view returns (Round memory) {
        if (!roundsIds.contains(roundId)) revert RoundNotExists(roundId);

        return rounds[roundId];
    }

    /// @notice Returns the round state.
    /// @param roundId Id of the round.
    function getRoundState(uint256 roundId) public view returns (RoundState) {
        if (!roundsIds.contains(roundId)) revert RoundNotExists(roundId);

        uint256 timestamp = block.timestamp;

        if (timestamp < rounds[roundId].startTimestamp) return RoundState.PENDING;

        if (timestamp >= rounds[roundId].endTimestamp || liquidityA == 0) {
            return RoundState.VESTING;
        }

        return RoundState.SALE;
    }

    /// @inheritdoc IVestPresaleScheduler
    function getTgeTimestamp() public view returns (uint256) {
        return tgeTimestamp;
    }

    /// @inheritdoc IVestPresaleScheduler
    function getListingTimestamp() public view returns (uint256) {
        return listingTimestamp;
    }

    /// @notice Returns the fee collector address.
    function getFeeCollector() public view returns (address) {
        return feeCollectorProvider.getFeeCollector();
    }

    /// @notice Adds new round.
    /// @param round Configuration of the round.
    function _addRound(Round memory round) internal {
        if (bytes(round.name).length == 0) revert Errors.UnacceptableValue();
        if (round.startTimestamp == 0 || round.endTimestamp == 0) revert Errors.UnacceptableValue();
        if (round.startTimestamp >= round.endTimestamp) revert Errors.UnacceptableValue();

        if (round.whitelistRoot != bytes32(0) && round.attributes.length != 0) {
            revert Errors.UnacceptableValue();
        }

        unchecked {
            ++roundSerialId;
        }

        roundsIds.add(roundSerialId);

        rounds[roundSerialId] = round;

        emit RoundUpdated(roundSerialId);
    }

    /// @notice Transfers `tokenB` tokens and creates the membership.
    /// @param roundId Id of the round.
    /// @param amountA amount of token A to buy
    /// @param attributes The membership attributes.
    function _buy(uint256 roundId, uint256 amountA, IVestMembership.Attributes memory attributes)
        internal
        returns (uint256)
    {
        if (amountA == 0) revert Errors.UnacceptableValue();
        if (amountA > attributes.allocation) revert Errors.UnacceptableValue();

        uint256 boughtA = _pay(0, attributes.allocation, attributes.price, amountA);

        return membership.mint(_msgSender(), roundId, 0, boughtA, attributes);
    }

    /// @notice Pays for `tokenA` with `tokenB`.
    /// @param bought how much a participant already bought
    /// @param allocation what’s participant’s allocation
    /// @param price attributes.price of the membership
    /// @param amountA Amount of tokenA to extend the membership.
    // slither-disable-next-line reentrancy-no-eth
    function _pay(uint256 bought, uint256 allocation, uint256 price, uint256 amountA) internal returns (uint256) {
        uint256 available = MathHelper.min(liquidityA, allocation - bought);
        uint256 buyingA = MathHelper.min(amountA, available);

        if (buyingA == 0) revert OutOfLiquidityA();

        uint256 tokenADecimals = ERC20Helper.decimals(tokenA);
        uint256 amountBPaidSoFar = bought * price / 10 ** tokenADecimals;
        uint256 amountBSumAfterThisTransaction = (bought + buyingA) * price / 10 ** tokenADecimals;
        uint256 amountB = amountBSumAfterThisTransaction - amountBPaidSoFar;

        if (amountB > 0) {
            uint256 receivedB;

            if (msg.value > 0) receivedB = ERC20Helper.deposit(tokenB, _msgSender(), address(this), amountB, msg.value);
            if (msg.value == 0) receivedB = ERC20Helper.transferFrom(tokenB, _msgSender(), address(this), amountB);

            if (receivedB != amountB) revert Errors.Forbidden();

            unchecked {
                liquidityB += amountB;
            }
        }

        unchecked {
            liquidityA -= buyingA;
        }

        return buyingA;
    }

    /**
     * @notice Ensure the sender can participate in sale state of a given round.
     *
     * Account cannot participate in the sale state if it is not on the whitelist or has
     * already participated in a round.
     *
     * @param roundId Id of the round.
     * @param attributes The membership attributes.
     */
    function _requireCallerCanParticipateInSale(uint256 roundId, IVestMembership.Attributes memory attributes)
        internal
    {
        bytes32 key = keccak256(
            abi.encode(
                _msgSender(),
                attributes.price,
                attributes.allocation,
                attributes.claimbackPeriod,
                attributes.tgeNumerator,
                attributes.tgeDenominator,
                attributes.cliffDuration,
                attributes.cliffNumerator,
                attributes.cliffDenominator,
                attributes.vestingPeriodCount,
                attributes.vestingPeriodDuration,
                attributes.tradeable
            )
        );

        if (roundParticipants[roundId][key]) revert AlreadyRoundParticipant(roundId, _msgSender());

        roundParticipants[roundId][key] = true;
    }

    /// @notice Ensure the sender is whitelisted.
    /// @param roundId Id of the round.
    /// @param attributes The membership attributes.
    /// @param proof Merkle tree proof.
    function _requireCallerIsWhitelisted(
        uint256 roundId,
        IVestMembership.Attributes memory attributes,
        bytes32[] calldata proof
    ) internal view {
        bytes32 key = keccak256(
            abi.encode(
                _msgSender(),
                attributes.price,
                attributes.allocation,
                attributes.claimbackPeriod,
                attributes.tgeNumerator,
                attributes.tgeDenominator,
                attributes.cliffDuration,
                attributes.cliffNumerator,
                attributes.cliffDenominator,
                attributes.vestingPeriodCount,
                attributes.vestingPeriodDuration,
                attributes.tradeable
            )
        );

        if (!MerkleProof.verify(proof, rounds[roundId].whitelistRoot, key)) revert Errors.AccountMismatch(_msgSender());
    }

    /// @notice Ensure the given attributes meet the requirements.
    /// @param attributes The membership attributes.
    function _requireValidAttributes(IVestMembership.Attributes memory attributes) internal pure {
        if (attributes.tgeDenominator == 0 || attributes.cliffDenominator == 0) revert Errors.DenominatorZero();

        if (attributes.cliffNumerator > 0 && attributes.cliffDuration == 0) revert CliffWithImmediateUnlock();

        if (attributes.vestingPeriodCount > 0 && attributes.vestingPeriodDuration == 0) {
            revert VestingWithImmediateUnlock();
        }

        if (attributes.vestingPeriodCount == 1) revert CliffLikeVesting();

        if (attributes.tgeNumerator == 0 && attributes.cliffDuration == 0 && attributes.vestingPeriodCount == 0) {
            revert VestingWithoutUnlocks();
        }

        if (attributes.vestingPeriodCount == 0 && attributes.cliffNumerator > 0) {
            revert CliffHeightWithoutSubsequentUnlocks();
        }

        if (
            attributes.cliffDuration == 0 && attributes.vestingPeriodCount == 0
                && attributes.tgeNumerator != attributes.tgeDenominator
        ) revert VestingSize();

        if (attributes.tgeNumerator > attributes.tgeDenominator) revert VestingSize();

        if (attributes.cliffNumerator > attributes.cliffDenominator) revert VestingSize();

        if (attributes.tgeNumerator > 0 && attributes.cliffNumerator > 0) {
            uint256 commonDenominator = attributes.tgeDenominator * attributes.cliffDenominator;
            uint256 totalUnlocks = attributes.tgeNumerator * attributes.cliffDenominator
                + attributes.cliffNumerator * attributes.tgeDenominator;
            if (totalUnlocks > commonDenominator) revert VestingSize();
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.23;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

/**
 * @title Withdrawable
 *
 * @notice This contract allows for withdrawing tokens and native Ether from the contract.
 * It also provides a method to receive Ether into the contract.
 */
abstract contract Withdrawable {
    using SafeERC20 for IERC20;

    /// @notice Reference address is `address(0)`.
    error WithdrawToZeroAddress();

    /// @notice Ensures the caller is eligible to withdraw.
    modifier protectedWithdrawal() virtual;

    receive() external payable virtual { }

    /// @notice Withdraws the token to the recipient.
    /// @param to Address of the recipient.
    /// @param token_ Address of the token.
    /// @param amount Amount to withdraw.
    function withdrawToken(address to, IERC20 token_, uint256 amount) public virtual protectedWithdrawal {
        if (to == address(0)) revert WithdrawToZeroAddress();

        token_.safeTransfer(to, amount);
    }

    /// @notice Withdraws the native coin to the recipient.
    /// @param to Address of the recipient.
    function withdrawCoin(address payable to) public virtual protectedWithdrawal {
        if (to == address(0)) revert WithdrawToZeroAddress();

        to.transfer(address(this).balance);
    }
}

{
  "compilationTarget": {
    "src/VestPresale.sol": "VestPresale"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": [
    ":@openzeppelin/=node_modules/@openzeppelin/",
    ":delegatecall/=lib/delegatecall/contracts/",
    ":ds-test/=lib/forge-std/lib/ds-test/src/",
    ":forge-std/=lib/forge-std/src/",
    ":murky/=lib/murky/src/",
    ":openzeppelin-contracts/=lib/murky/lib/openzeppelin-contracts/",
    ":solady/=lib/solady/src/",
    ":solidity-stringutils/=lib/solidity-stringutils/src/"
  ]
}