// SPDX-License-Identifier: MIT

pragma solidity 0.8.15;

// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

library Constants {
    address internal constant SYNDICATE_TREASURY =
        0x40dB79f7f18C468c6552538b488c58B5E72bf4D9;
}

interface IFeeCalculator {
    function calculate(address minter, uint256 depositAmount)
        external
        view
        returns (uint256);
}

// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

/**
 * @title IERC1644 Controller Token Operation (part of the ERC1400 Security
 * Token Standards)
 *
 * See https://github.com/ethereum/EIPs/issues/1644. Data and operatorData
 * parameters were removed.
 */
interface IERC1644 {
    event ControllerRedemption(
        address account,
        address indexed from,
        uint256 value
    );

    event ControllerTransfer(
        address controller,
        address indexed from,
        address indexed to,
        uint256 value
    );

    /**
     * Burns `tokenId` without checking whether the caller owns or is approved
     * to spend the token.
     *
     * Emits a `Transfer` event with `address(0)` as `to` AND a
     * `ControllerRedemption` event.
     *
     * Requirements:
     * - The caller must be the token contract owner or the batcher.
     * - `isControllable` must be true.
     * @param account The account whose token will be burned.
     * @param value Amount (ERC20) or token ID (ERC721)
     */
    function controllerRedeem(
        address account,
        uint256 value // amount (ERC20) or tokenId (ERC721))
    ) external;

    /**
     * Transfers `tokenId` token from `from` to `to`, without checking whether
     * the caller owns or is approved to spend the token.
     *
     * Emits a `Transfer` event with `address(0)` as `to` AND a
     * `ControllerRedemption` event.
     *
     * Requirements:
     * - The caller must be the token contract owner or the batcher.
     * - `isControllable` must be true.
     * @param from The account sending the token.
     * @param to The account to receive the token.
     * @param value Amount (ERC20) or token ID (ERC721)
     */
    function controllerTransfer(
        address from,
        address to,
        uint256 value // amount (ERC20) or tokenId (ERC721)
    ) external;
}

interface ITokenRecoverable {
    // Events for token recovery (ERC20) and (ERC721)
    event TokenRecoveredERC20(
        address indexed recipient,
        address indexed erc20,
        uint256 amount
    );
    event TokenRecoveredERC721(
        address indexed recipient,
        address indexed erc721,
        uint256 tokenId
    );

    /**
     * Allows the owner of an ERC20Club or ERC721Collective to return
     * any ERC20 tokens erroneously sent to the contract.
     *
     * Emits a `TokenRecoveredERC20` event.
     *
     * Requirements:
     * - The caller must be the (Club or Collective) token contract owner.
     * @param recipient Address that erroneously sent the ERC20 token(s)
     * @param erc20 Erroneously-sent ERC20 token to recover
     * @param amount Amount to recover
     */
    function recoverERC20(
        address recipient,
        address erc20,
        uint256 amount
    ) external;

    /**
     * Allows the owner of an ERC20Club or ERC721Collective to return
     * any ERC721 tokens erroneously sent to the contract.
     *
     * Emits a `TokenRecoveredERC721` event.
     *
     * Requirements:
     * - The caller must be the (Club or Collective) token contract owner.
     * @param recipient Address that erroneously sent the ERC721 token
     * @param erc721 Erroneously-sent ERC721 token to recover
     * @param tokenId The tokenId to recover
     */
    function recoverERC721(
        address recipient,
        address erc721,
        uint256 tokenId
    ) external;
}

/**
 * Interface for a Guard that governs whether a token can be minted, burned, or
 * transferred by a particular operator, from a particular sender (`from` is
 * address 0 iff the token is being minted), to a particular recipient (`to` is
 * address 0 iff the token is being burned).
 */
interface IGuard {
    /**
     * @return True iff the transaction is allowed
     * @param operator Transaction msg.sender
     * @param from Token sender
     * @param to Token recipient
     * @param value Amount (ERC20) or token ID (ERC721)
     */
    function isAllowed(
        address operator,
        address from,
        address to,
        uint256 value // amount (ERC20) or tokenId (ERC721)
    ) external view returns (bool);
}

interface ITokenEnforceable is ITokenRecoverable {
    event ControlDisabled(address indexed controller);
    event BatcherUpdated(address batcher);
    event GuardUpdated(GuardType indexed guard, address indexed implementation);
    event GuardLocked(
        bool mintGuardLocked,
        bool burnGuardLocked,
        bool transferGuardLocked
    );

    /**
     * @return The address of the transaction batcher used to batch calls over
     * onlyOwner functions.
     */
    function batcher() external view returns (address);

    /**
     * @return True iff the token contract owner is allowed to mint, burn, or
     * transfer on behalf of arbitrary addresses.
     */
    function isControllable() external view returns (bool);

    /**
     * @return The address of the Guard used to determine whether a mint is
     * allowed. The contract at this address is assumed to implement the IGuard
     * interface.
     */
    function mintGuard() external view returns (IGuard);

    /**
     * @return The address of the Guard used to determine whether a burn is
     * allowed. The contract at this address is assumed to implement the IGuard
     * interface.
     */
    function burnGuard() external view returns (IGuard);

    /**
     * @return The address of the Guard used to determine whether a transfer is
     * allowed. The contract at this address is assumed to implement the IGuard
     * interface.
     */
    function transferGuard() external view returns (IGuard);

    /**
     * @return True iff the mint Guard cannot be changed.
     */
    function mintGuardLocked() external view returns (bool);

    /**
     * @return True iff the burn Guard cannot be changed.
     */
    function burnGuardLocked() external view returns (bool);

    /**
     * @return True iff the transfer Guard cannot be changed.
     */
    function transferGuardLocked() external view returns (bool);

    /**
     * Irreversibly disables the token contract owner from minting, burning,
     * and transferring on behalf of arbitrary addresses.
     *
     * Emits a `ControlDisabled` event.
     *
     * Requirements:
     * - The caller must be the token contract owner or the batcher.
     */
    function disableControl() external;

    /**
     * Irreversibly prevents the token contract owner from changing the mint,
     * burn, and/or transfer Guards.
     *
     * If at least one guard was requested to be locked, emits a `GuardLocked`
     * event confirming whether each Guard is locked.
     *
     * Requirements:
     * - The caller must be the token contract owner or the batcher.
     * @param mintGuardLock If true, the mint Guard will be locked. If false,
     * does nothing to the mint Guard.
     * @param burnGuardLock If true, the mint Guard will be locked. If false,
     * does nothing to the burn Guard.
     * @param transferGuardLock If true, the mint Guard will be locked. If
     * false, does nothing to the transfer Guard.
     */
    function lockGuards(
        bool mintGuardLock,
        bool burnGuardLock,
        bool transferGuardLock
    ) external;

    /**
     * Update the address of the batcher for batching calls over
     * onlyOwner functions.
     *
     * Emits a `BatcherUpdated` event.
     *
     * Requirements:
     * - The caller must be the token contract owner or the batcher.
     * @param implementation Address of new batcher
     */
    function updateBatcher(address implementation) external;

    /**
     * Update the address of the Guard for minting. The contract at the
     * passed-in address is assumed to implement the IGuard interface.
     *
     * Emits a `GuardUpdated` event with `GuardType.Mint`.
     *
     * Requirements:
     * - The caller must be the token contract owner or the batcher.
     * - The mint Guard must not be locked.
     * @param implementation Address of new mint Guard
     */
    function updateMintGuard(address implementation) external;

    /**
     * Update the address of the Guard for burning. The contract at the
     * passed-in address is assumed to implement the IGuard interface.
     *
     * Emits a `GuardUpdated` event with `GuardType.Burn`.
     *
     * Requirements:
     * - The caller must be the token contract owner or the batcher.
     * - The burn Guard must not be locked.
     * @param implementation Address of new burn Guard
     */
    function updateBurnGuard(address implementation) external;

    /**
     * Update the address of the Guard for transferring. The contract at the
     * passed-in address is assumed to implement the IGuard interface.
     *
     * Emits a `GuardUpdated` event with `GuardType.Transfer`.
     *
     * Requirements:
     * - The caller must be the token contract owner or the batcher.
     * - The transfer Guard must not be locked.
     * @param implementation Address of transfer Guard
     */
    function updateTransferGuard(address implementation) external;

    /**
     * @return True iff a token can be minted, burned, or transferred by a
     * particular operator, from a particular sender (`from` is address 0 iff
     * the token is being minted), to a particular recipient (`to` is address 0
     * iff the token is being burned).
     * @param operator Transaction msg.sender
     * @param from Token sender
     * @param to Token recipient
     * @param value Amount (ERC20) or token ID (ERC721)
     */
    function isAllowed(
        address operator,
        address from,
        address to,
        uint256 value // amount (ERC20) or tokenId (ERC721)
    ) external view returns (bool);

    /**
     * @return owner The address of the token contract owner
     */
    function owner() external view returns (address);

    /**
     * Transfers ownership of the contract to a new account (`newOwner`)
     *
     * Emits an `OwnershipTransferred` event.
     *
     * Requirements:
     * - The caller must be the current owner.
     * @param newOwner Address that will become the owner
     */
    function transferOwnership(address newOwner) external;

    /**
     * Leaves the contract without an owner. After calling this function, it
     * will no longer be possible to call `onlyOwner` functions.
     *
     * Requirements:
     * - The caller must be the current owner.
     */
    function renounceOwnership() external;
}

enum GuardType {
    Mint,
    Burn,
    Transfer
}

interface IERC20ClubUnchained is IERC1644 {
    event MemberJoined(address indexed member);
    event MemberExited(address indexed member);

    // solhint-disable-next-line func-name-mixedcase
    function __ERC20Club_init(
        string memory name_,
        string memory symbol_,
        address mintGuard_,
        address burnGuard_,
        address transferGuard_
    ) external;

    function memberCount() external view returns (uint256);

    function mintTo(address account, uint256 amount) external returns (bool);

    function redeem(uint256 amount) external returns (bool);

    function redeemFrom(address account, uint256 amount)
        external
        returns (bool);
}

interface IERC20Club is
    IERC20,
    IERC20Metadata,
    ITokenEnforceable,
    IERC20ClubUnchained
{}

// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol)

// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

/**
 * @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);
}

/**
 * @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 caller.
     *
     * 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);
}

// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)

// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Permit.sol)

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

interface IOwner {
    function owner() external view returns (address);
}

/**
 * Utility for use by any module or guard that needs to check if an address is
 * the owner of the TokenEnforceable (ERC20Club or ERC721Collective)
 */

abstract contract TokenOwnerChecker {
    /**
     * Only proceed if msg.sender owns TokenEnforceable contract
     * @param token TokenEnforceable whose owner to check
     */
    modifier onlyTokenOwner(address token) {
        _onlyTokenOwner(token);
        _;
    }

    function _onlyTokenOwner(address token) internal view {
        require(
            msg.sender == IOwner(token).owner(),
            "TokenOwnerChecker: Caller not token owner"
        );
    }
}

abstract contract TokenRecoverable is TokenOwnerChecker, ITokenRecoverable {
    // Using safeTransfer since interacting with other ERC20s
    using SafeERC20 for IERC20;

    address public admin;

    constructor(address _admin) {
        admin = _admin;
    }

    modifier isAdmin() {
        require(msg.sender == admin, "TokenRecoverable: Caller not admin");
        _;
    }

    /**
     * Only allows a syndicate address to access any ERC20 tokens erroneously sent to the contract.
     *
     * Emits a `TokenRecoveredERC20` event.
     *
     * Requirements:
     * - None
     * @param recipient Address that erroneously sent the ERC20 token(s)
     * @param erc20 Erroneously-sent ERC20 token to recover
     * @param amount Amount to recover
     */
    function recoverERC20(
        address recipient,
        address erc20,
        uint256 amount
    ) external isAdmin {
        IERC20(erc20).safeTransfer(recipient, amount);
        emit TokenRecoveredERC20(recipient, erc20, amount);
    }

    /**
     * Only allows a syndicate address to access any ERC721 tokens erroneously sent to the contract.
     *
     * Emits a `TokenRecoveredERC721` event.
     *
     * Requirements:
     * - None
     * @param recipient Address that erroneously sent the ERC721 token
     * @param erc721 Erroneously-sent ERC721 token to recover
     * @param tokenId The tokenId to recover
     */
    function recoverERC721(
        address recipient,
        address erc721,
        uint256 tokenId
    ) external isAdmin {
        IERC721(erc721).transferFrom(address(this), recipient, tokenId);
        emit TokenRecoveredERC721(recipient, erc721, tokenId);
    }
}

interface IFeeManager {
    function getFeeCalculator(address token) external view returns (address);
}

/// This the base contract for the basic distributions contracts
abstract contract DistributionModuleBase is ReentrancyGuard {
    // Fee manager address
    IFeeManager public immutable feeManager;

    constructor(address feeManager_) {
        feeManager = IFeeManager(feeManager_);
    }

    /// Helper function to calculate total supply of given array of members
    /// @notice members must be sorted and unique
    /// @param club ERC20 club
    /// @param members List of club member addresses - must be sorted
    function calculateTotalSupply(address club, address[] calldata members)
        internal
        view
        returns (uint256)
    {
        uint256 totalSupply;

        // Keep track of last address for de-duplication
        address last = address(0);
        uint256 length = members.length;
        for (uint256 i = 0; i < length; ) {
            require(
                members[i] > last,
                "DistributionModule: addresses not sorted or duplicated"
            );
            totalSupply += IERC20Club(club).balanceOf(members[i]);
            last = members[i];
            unchecked {
                ++i;
            }
        }

        return totalSupply;
    }

    /// This function is called for all messages sent to this contract (there
    /// are no other functions). Sending Ether to this contract will cause an
    /// exception, because the fallback function does not have the `payable`
    /// modifier.
    /// Source: https://docs.soliditylang.org/en/v0.8.9/contracts.html?highlight=fallback#fallback-function
    fallback() external {
        revert("DistributionModuleBase: non-existent function");
    }
}

/// This module contract distributed ETH to a list of members for a given club
contract DistributionModuleEth is DistributionModuleBase, TokenRecoverable {
    /// Events
    event MemberDistributed(
        address indexed club,
        address indexed member,
        uint256 amount,
        uint256 totalDistributionAmount,
        string batchIdentifier
    );

    constructor(address feeManager_, address admin)
        DistributionModuleBase(feeManager_)
        TokenRecoverable(admin)
    {}

    /// Function that distributes ETH to the list of members for the given club.
    /// @notice If an address in the members array (which must be sorted) has a balance of 0 this will not revert
    /// @param club The club being distributed
    /// @param members The list of member addresses - must be sorted (deduplication)
    /// @param batchIdentifier Unique batch identifier - used for off-chain batch management
    function multiMemberDistribute(
        address club,
        address[] calldata members,
        string calldata batchIdentifier
    ) external payable nonReentrant {
        require(msg.value > 0, "DistributionModuleEth: No ETH sent");

        // Take fee
        uint256 feeAmount = IFeeCalculator(feeManager.getFeeCalculator(club))
            .calculate(msg.sender, msg.value);
        // Variable to keep track of total amount distributed
        uint256 totalDistributed;

        // Calculate total supply of given members
        uint256 totalSupply = calculateTotalSupply(club, members);

        uint256 length = members.length;
        for (uint256 i = 0; i < length; ) {
            uint256 memberBalance = IERC20Club(club).balanceOf(members[i]);

            // Only distribute if member has balance
            if (memberBalance != 0) {
                uint256 memberDistribution = (memberBalance *
                    (msg.value - feeAmount)) / totalSupply;
                totalDistributed += memberDistribution;

                // Give member the distribution
                // solhint-disable-next-line avoid-low-level-calls
                (bool sent, ) = payable(members[i]).call{
                    value: memberDistribution
                }("");
                require(
                    sent,
                    "DistributionModuleEth: Failed to send Ether to member"
                );

                emit MemberDistributed(
                    club,
                    members[i],
                    memberDistribution,
                    msg.value,
                    batchIdentifier
                );
            }

            unchecked {
                ++i;
            }
        }

        if (feeAmount != 0) {
            // solhint-disable-next-line avoid-low-level-calls
            (bool sent, ) = payable(Constants.SYNDICATE_TREASURY).call{
                value: feeAmount
            }("");
            require(sent, "DistributionModuleEth: Failed to send Ether fee");
        }

        // Refund any excess eth
        if (address(this).balance > 0) {
            // solhint-disable-next-line avoid-low-level-calls
            (bool sent, ) = payable(msg.sender).call{
                value: address(this).balance
            }("");
            require(
                sent,
                "DistributionModuleEth: Failed to refund excess Ether"
            );
        }
    }
}