// File: contracts/Governance.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "./interfaces/ITerminal.sol";
import "./interfaces/IPrices.sol";
import "./abstract/JuiceboxProject.sol";

/// Owner should eventually change to a multisig wallet contract.
contract Governance is JuiceboxProject {
    // --- external transactions --- //

    constructor(uint256 _projectId, ITerminalDirectory _terminalDirectory)
        JuiceboxProject(_projectId, _terminalDirectory)
    {}

    /** 
      @notice Gives projects using one Terminal access to migrate to another Terminal.
      @param _from The terminal to allow a new migration from.
      @param _to The terminal to allow migration to.
    */
    function allowMigration(ITerminal _from, ITerminal _to) external onlyOwner {
        _from.allowMigration(_to);
    }

    /**
        @notice Adds a price feed.
        @param _prices The prices contract to add a feed to.
        @param _feed The price feed to add.
        @param _currency The currency the price feed is for.
    */
    function addPriceFeed(
        IPrices _prices,
        AggregatorV3Interface _feed,
        uint256 _currency
    ) external onlyOwner {
        _prices.addFeed(_feed, _currency);
    }

    /** 
      @notice Sets the fee of the TerminalV1.
      @param _terminalV1 The terminalV1 to change the fee of.
      @param _fee The new fee.
    */
    function setFee(ITerminalV1 _terminalV1, uint256 _fee) external onlyOwner {
        _terminalV1.setFee(_fee);
    }

    /** 
      @notice Appoints a new governance for the specified terminalV1.
      @param _terminalV1 The terminalV1 to change the governance of.
      @param _newGovernance The address to appoint as governance.
    */
    function appointGovernance(
        ITerminalV1 _terminalV1,
        address payable _newGovernance
    ) external onlyOwner {
        _terminalV1.appointGovernance(_newGovernance);
    }

    /** 
      @notice Accepts the offer to be the governance of a new terminalV1.
      @param _terminalV1 The terminalV1 to change the governance of.
    */
    function acceptGovernance(ITerminalV1 _terminalV1) external onlyOwner {
        _terminalV1.acceptGovernance();
    }
}

// File: contracts/interfaces/ITerminal.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "./ITerminalDirectory.sol";

interface ITerminal {
    event Pay(
        uint256 indexed fundingCycleId,
        uint256 indexed projectId,
        address indexed beneficiary,
        uint256 amount,
        string note,
        address caller
    );

    event AddToBalance(
        uint256 indexed projectId,
        uint256 value,
        address caller
    );

    event AllowMigration(ITerminal allowed);

    event Migrate(
        uint256 indexed projectId,
        ITerminal indexed to,
        uint256 _amount,
        address caller
    );

    function terminalDirectory() external view returns (ITerminalDirectory);

    function migrationIsAllowed(ITerminal _terminal)
        external
        view
        returns (bool);

    function pay(
        uint256 _projectId,
        address _beneficiary,
        string calldata _memo,
        bool _preferUnstakedTickets
    ) external payable returns (uint256 fundingCycleId);

    function addToBalance(uint256 _projectId) external payable;

    function allowMigration(ITerminal _contract) external;

    function migrate(uint256 _projectId, ITerminal _to) external;
}

// File: contracts/interfaces/IPrices.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "@chainlink/contracts/src/v0.6/interfaces/AggregatorV3Interface.sol";

interface IPrices {
    event AddFeed(uint256 indexed currency, AggregatorV3Interface indexed feed);

    function feedDecimalAdjuster(uint256 _currency) external returns (uint256);

    function targetDecimals() external returns (uint256);

    function feedFor(uint256 _currency)
        external
        returns (AggregatorV3Interface);

    function getETHPriceFor(uint256 _currency) external view returns (uint256);

    function addFeed(AggregatorV3Interface _priceFeed, uint256 _currency)
        external;
}

// File: contracts/abstract/JuiceboxProject.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Address.sol";

import "./../interfaces/ITerminalV1.sol";

/** 
  @notice A contract that inherits from JuiceboxProject can use Juicebox as a business-model-as-a-service.
  @dev The owner of the contract makes admin decisions such as:
    - Which address is the funding cycle owner, which can tap funds from the funding cycle.
    - Should this project's Tickets be migrated to a new TerminalV1. 
*/
abstract contract JuiceboxProject is IERC721Receiver, Ownable {
    /// @notice The direct deposit terminals.
    ITerminalDirectory public immutable terminalDirectory;

    /// @notice The ID of the project that should be used to forward this contract's received payments.
    uint256 public projectId;

    /** 
      @param _projectId The ID of the project that should be used to forward this contract's received payments.
      @param _terminalDirectory A directory of a project's current Juicebox terminal to receive payments in.
    */
    constructor(uint256 _projectId, ITerminalDirectory _terminalDirectory) {
        projectId = _projectId;
        terminalDirectory = _terminalDirectory;
    }

    receive() external payable {}

    /** 
      @notice Withdraws funds stored in this contract.
      @param _beneficiary The address to send the funds to.
      @param _amount The amount to send.
    */
    function withdraw(address payable _beneficiary, uint256 _amount)
        external
        onlyOwner
    {
        Address.sendValue(_beneficiary, _amount);
    }

    /** 
      @notice Allows the project that is being managed to be set.
      @param _projectId The ID of the project that is being managed.
    */
    function setProjectId(uint256 _projectId) external onlyOwner {
        projectId = _projectId;
    }

    /** 
      @notice Make a payment to this project.
      @param _beneficiary The address who will receive tickets from this fee.
      @param _memo A memo that will be included in the published event.
      @param _preferUnstakedTickets Whether ERC20's should be claimed automatically if they have been issued.
    */
    function pay(
        address _beneficiary,
        string calldata _memo,
        bool _preferUnstakedTickets
    ) external payable {
        require(projectId != 0, "JuiceboxProject::pay: PROJECT_NOT_FOUND");

        // Get the terminal for this contract's project.
        ITerminal _terminal = terminalDirectory.terminalOf(projectId);

        // There must be a terminal.
        require(
            _terminal != ITerminal(address(0)),
            "JuiceboxProject::pay: TERMINAL_NOT_FOUND"
        );

        _terminal.pay{value: msg.value}(
            projectId,
            _beneficiary,
            _memo,
            _preferUnstakedTickets
        );
    }

    /** 
        @notice Transfer the ownership of the project to a new owner.  
        @dev This contract will no longer be able to reconfigure or tap funds from this project.
        @param _projects The projects contract.
        @param _newOwner The new project owner.
        @param _projectId The ID of the project to transfer ownership of.
        @param _data Arbitrary data to include in the transaction.
    */
    function transferProjectOwnership(
        IProjects _projects,
        address _newOwner,
        uint256 _projectId,
        bytes calldata _data
    ) external onlyOwner {
        _projects.safeTransferFrom(address(this), _newOwner, _projectId, _data);
    }

    /** 
      @notice Allows this contract to receive a project.
    */
    function onERC721Received(
        address,
        address,
        uint256,
        bytes calldata
    ) public pure override returns (bytes4) {
        return this.onERC721Received.selector;
    }

    function setOperator(
        IOperatorStore _operatorStore,
        address _operator,
        uint256 _projectId,
        uint256[] calldata _permissionIndexes
    ) external onlyOwner {
        _operatorStore.setOperator(_operator, _projectId, _permissionIndexes);
    }

    function setOperators(
        IOperatorStore _operatorStore,
        address[] calldata _operators,
        uint256[] calldata _projectIds,
        uint256[][] calldata _permissionIndexes
    ) external onlyOwner {
        _operatorStore.setOperators(
            _operators,
            _projectIds,
            _permissionIndexes
        );
    }

    /** 
      @notice Take a fee for this project from this contract.
      @param _amount The payment amount.
      @param _beneficiary The address who will receive tickets from this fee.
      @param _memo A memo that will be included in the published event.
      @param _preferUnstakedTickets Whether ERC20's should be claimed automatically if they have been issued.
    */
    function _takeFee(
        uint256 _amount,
        address _beneficiary,
        string memory _memo,
        bool _preferUnstakedTickets
    ) internal {
        require(projectId != 0, "JuiceboxProject::takeFee: PROJECT_NOT_FOUND");
        // Find the terminal for this contract's project.
        ITerminal _terminal = terminalDirectory.terminalOf(projectId);

        // There must be a terminal.
        require(
            _terminal != ITerminal(address(0)),
            "JuiceboxProject::takeFee: TERMINAL_NOT_FOUND"
        );

        // There must be enough funds in the contract to take the fee.
        require(
            address(this).balance >= _amount,
            "JuiceboxProject::takeFee: INSUFFICIENT_FUNDS"
        );

        // Send funds to the terminal.
        _terminal.pay{value: _amount}(
            projectId,
            _beneficiary,
            _memo,
            _preferUnstakedTickets
        );
    }
}

// File: contracts/interfaces/ITerminalDirectory.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "./IDirectPaymentAddress.sol";
import "./ITerminal.sol";
import "./IProjects.sol";
import "./IProjects.sol";

interface ITerminalDirectory {
    event DeployAddress(
        uint256 indexed projectId,
        string memo,
        address indexed caller
    );

    event SetTerminal(
        uint256 indexed projectId,
        ITerminal indexed terminal,
        address caller
    );

    event SetPayerPreferences(
        address indexed account,
        address beneficiary,
        bool preferUnstakedTickets
    );

    function projects() external view returns (IProjects);

    function terminalOf(uint256 _projectId) external view returns (ITerminal);

    function beneficiaryOf(address _account) external returns (address);

    function unstakedTicketsPreferenceOf(address _account)
        external
        returns (bool);

    function addressesOf(uint256 _projectId)
        external
        view
        returns (IDirectPaymentAddress[] memory);

    function deployAddress(uint256 _projectId, string calldata _memo) external;

    function setTerminal(uint256 _projectId, ITerminal _terminal) external;

    function setPayerPreferences(
        address _beneficiary,
        bool _preferUnstakedTickets
    ) external;
}

// File: contracts/interfaces/IDirectPaymentAddress.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "./ITerminalDirectory.sol";
import "./ITerminal.sol";

interface IDirectPaymentAddress {
    event Forward(
        address indexed payer,
        uint256 indexed projectId,
        address beneficiary,
        uint256 value,
        string memo,
        bool preferUnstakedTickets
    );

    function terminalDirectory() external returns (ITerminalDirectory);

    function projectId() external returns (uint256);

    function memo() external returns (string memory);
}

// File: contracts/interfaces/IProjects.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";

import "./ITerminal.sol";
import "./IOperatorStore.sol";

interface IProjects is IERC721 {
    event Create(
        uint256 indexed projectId,
        address indexed owner,
        bytes32 indexed handle,
        string uri,
        ITerminal terminal,
        address caller
    );

    event SetHandle(
        uint256 indexed projectId,
        bytes32 indexed handle,
        address caller
    );

    event SetUri(uint256 indexed projectId, string uri, address caller);

    event TransferHandle(
        uint256 indexed projectId,
        address indexed to,
        bytes32 indexed handle,
        bytes32 newHandle,
        address caller
    );

    event ClaimHandle(
        address indexed account,
        uint256 indexed projectId,
        bytes32 indexed handle,
        address caller
    );

    event ChallengeHandle(
        bytes32 indexed handle,
        uint256 challengeExpiry,
        address caller
    );

    event RenewHandle(
        bytes32 indexed handle,
        uint256 indexed projectId,
        address caller
    );

    function count() external view returns (uint256);

    function uriOf(uint256 _projectId) external view returns (string memory);

    function handleOf(uint256 _projectId) external returns (bytes32 handle);

    function projectFor(bytes32 _handle) external returns (uint256 projectId);

    function transferAddressFor(bytes32 _handle)
        external
        returns (address receiver);

    function challengeExpiryOf(bytes32 _handle) external returns (uint256);

    function exists(uint256 _projectId) external view returns (bool);

    function create(
        address _owner,
        bytes32 _handle,
        string calldata _uri,
        ITerminal _terminal
    ) external returns (uint256 id);

    function setHandle(uint256 _projectId, bytes32 _handle) external;

    function setUri(uint256 _projectId, string calldata _uri) external;

    function transferHandle(
        uint256 _projectId,
        address _to,
        bytes32 _newHandle
    ) external returns (bytes32 _handle);

    function claimHandle(
        bytes32 _handle,
        address _for,
        uint256 _projectId
    ) external;
}

// File: @openzeppelin/contracts/token/ERC721/IERC721.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../../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`, 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 be 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: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * 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 Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @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 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);

    /**
     * @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;
}

// File: contracts/interfaces/IOperatorStore.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

interface IOperatorStore {
    event SetOperator(
        address indexed operator,
        address indexed account,
        uint256 indexed domain,
        uint256[] permissionIndexes,
        uint256 packed
    );

    function permissionsOf(
        address _operator,
        address _account,
        uint256 _domain
    ) external view returns (uint256);

    function hasPermission(
        address _operator,
        address _account,
        uint256 _domain,
        uint256 _permissionIndex
    ) external view returns (bool);

    function hasPermissions(
        address _operator,
        address _account,
        uint256 _domain,
        uint256[] calldata _permissionIndexes
    ) external view returns (bool);

    function setOperator(
        address _operator,
        uint256 _domain,
        uint256[] calldata _permissionIndexes
    ) external;

    function setOperators(
        address[] calldata _operators,
        uint256[] calldata _domains,
        uint256[][] calldata _permissionIndexes
    ) external;
}

// File: @openzeppelin/contracts/utils/introspection/IERC165.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

// File: @chainlink/contracts/src/v0.6/interfaces/AggregatorV3Interface.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0;

interface AggregatorV3Interface {

  function decimals() external view returns (uint8);
  function description() external view returns (string memory);
  function version() external view returns (uint256);

  // getRoundData and latestRoundData should both raise "No data present"
  // if they do not have data to report, instead of returning unset values
  // which could be misinterpreted as actual reported values.
  function getRoundData(uint80 _roundId)
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );
  function latestRoundData()
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

}

// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _setOwner(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: @openzeppelin/contracts/utils/Address.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) private pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

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

// File: contracts/interfaces/ITerminalV1.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";

import "./ITicketBooth.sol";
import "./IFundingCycles.sol";
import "./IYielder.sol";
import "./IProjects.sol";
import "./IModStore.sol";
import "./ITerminal.sol";
import "./IOperatorStore.sol";

struct FundingCycleMetadata {
    uint256 reservedRate;
    uint256 bondingCurveRate;
    uint256 reconfigurationBondingCurveRate;
}

interface ITerminalV1 {
    event Configure(
        uint256 indexed fundingCycleId,
        uint256 indexed projectId,
        address caller
    );

    event Tap(
        uint256 indexed fundingCycleId,
        uint256 indexed projectId,
        address indexed beneficiary,
        uint256 amount,
        uint256 currency,
        uint256 netTransferAmount,
        uint256 beneficiaryTransferAmount,
        uint256 govFeeAmount,
        address caller
    );
    event Redeem(
        address indexed holder,
        address indexed beneficiary,
        uint256 indexed _projectId,
        uint256 amount,
        uint256 returnAmount,
        address caller
    );

    event PrintReserveTickets(
        uint256 indexed fundingCycleId,
        uint256 indexed projectId,
        address indexed beneficiary,
        uint256 count,
        uint256 beneficiaryTicketAmount,
        address caller
    );

    event DistributeToPayoutMod(
        uint256 indexed fundingCycleId,
        uint256 indexed projectId,
        PayoutMod mod,
        uint256 modCut,
        address caller
    );
    event DistributeToTicketMod(
        uint256 indexed fundingCycleId,
        uint256 indexed projectId,
        TicketMod mod,
        uint256 modCut,
        address caller
    );
    event AppointGovernance(address governance);

    event AcceptGovernance(address governance);

    event PrintPreminedTickets(
        uint256 indexed projectId,
        address indexed beneficiary,
        uint256 amount,
        uint256 currency,
        string memo,
        address caller
    );

    event Deposit(uint256 amount);

    event EnsureTargetLocalWei(uint256 target);

    event SetYielder(IYielder newYielder);

    event SetFee(uint256 _amount);

    event SetTargetLocalWei(uint256 amount);

    function governance() external view returns (address payable);

    function pendingGovernance() external view returns (address payable);

    function projects() external view returns (IProjects);

    function fundingCycles() external view returns (IFundingCycles);

    function ticketBooth() external view returns (ITicketBooth);

    function prices() external view returns (IPrices);

    function modStore() external view returns (IModStore);

    function reservedTicketBalanceOf(uint256 _projectId, uint256 _reservedRate)
        external
        view
        returns (uint256);

    function canPrintPreminedTickets(uint256 _projectId)
        external
        view
        returns (bool);

    function balanceOf(uint256 _projectId) external view returns (uint256);

    function currentOverflowOf(uint256 _projectId)
        external
        view
        returns (uint256);

    function claimableOverflowOf(
        address _account,
        uint256 _amount,
        uint256 _projectId
    ) external view returns (uint256);

    function fee() external view returns (uint256);

    function deploy(
        address _owner,
        bytes32 _handle,
        string calldata _uri,
        FundingCycleProperties calldata _properties,
        FundingCycleMetadata calldata _metadata,
        PayoutMod[] memory _payoutMods,
        TicketMod[] memory _ticketMods
    ) external;

    function configure(
        uint256 _projectId,
        FundingCycleProperties calldata _properties,
        FundingCycleMetadata calldata _metadata,
        PayoutMod[] memory _payoutMods,
        TicketMod[] memory _ticketMods
    ) external returns (uint256);

    function printPreminedTickets(
        uint256 _projectId,
        uint256 _amount,
        uint256 _currency,
        address _beneficiary,
        string memory _memo,
        bool _preferUnstakedTickets
    ) external;

    function tap(
        uint256 _projectId,
        uint256 _amount,
        uint256 _currency,
        uint256 _minReturnedWei
    ) external returns (uint256);

    function redeem(
        address _account,
        uint256 _projectId,
        uint256 _amount,
        uint256 _minReturnedWei,
        address payable _beneficiary,
        bool _preferUnstaked
    ) external returns (uint256 returnAmount);

    function printReservedTickets(uint256 _projectId)
        external
        returns (uint256 reservedTicketsToPrint);

    function setFee(uint256 _fee) external;

    function appointGovernance(address payable _pendingGovernance) external;

    function acceptGovernance() external;
}

// File: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

// File: contracts/interfaces/ITicketBooth.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "./IProjects.sol";
import "./IOperatorStore.sol";
import "./ITickets.sol";

interface ITicketBooth {
    event Issue(
        uint256 indexed projectId,
        string name,
        string symbol,
        address caller
    );
    event Print(
        address indexed holder,
        uint256 indexed projectId,
        uint256 amount,
        bool convertedTickets,
        bool preferUnstakedTickets,
        address controller
    );

    event Redeem(
        address indexed holder,
        uint256 indexed projectId,
        uint256 amount,
        uint256 stakedTickets,
        bool preferUnstaked,
        address controller
    );

    event Stake(
        address indexed holder,
        uint256 indexed projectId,
        uint256 amount,
        address caller
    );

    event Unstake(
        address indexed holder,
        uint256 indexed projectId,
        uint256 amount,
        address caller
    );

    event Lock(
        address indexed holder,
        uint256 indexed projectId,
        uint256 amount,
        address caller
    );

    event Unlock(
        address indexed holder,
        uint256 indexed projectId,
        uint256 amount,
        address caller
    );

    event Transfer(
        address indexed holder,
        uint256 indexed projectId,
        address indexed recipient,
        uint256 amount,
        address caller
    );

    function ticketsOf(uint256 _projectId) external view returns (ITickets);

    function projects() external view returns (IProjects);

    function lockedBalanceOf(address _holder, uint256 _projectId)
        external
        view
        returns (uint256);

    function lockedBalanceBy(
        address _operator,
        address _holder,
        uint256 _projectId
    ) external view returns (uint256);

    function stakedBalanceOf(address _holder, uint256 _projectId)
        external
        view
        returns (uint256);

    function stakedTotalSupplyOf(uint256 _projectId)
        external
        view
        returns (uint256);

    function totalSupplyOf(uint256 _projectId) external view returns (uint256);

    function balanceOf(address _holder, uint256 _projectId)
        external
        view
        returns (uint256 _result);

    function issue(
        uint256 _projectId,
        string calldata _name,
        string calldata _symbol
    ) external;

    function print(
        address _holder,
        uint256 _projectId,
        uint256 _amount,
        bool _preferUnstakedTickets
    ) external;

    function redeem(
        address _holder,
        uint256 _projectId,
        uint256 _amount,
        bool _preferUnstaked
    ) external;

    function stake(
        address _holder,
        uint256 _projectId,
        uint256 _amount
    ) external;

    function unstake(
        address _holder,
        uint256 _projectId,
        uint256 _amount
    ) external;

    function lock(
        address _holder,
        uint256 _projectId,
        uint256 _amount
    ) external;

    function unlock(
        address _holder,
        uint256 _projectId,
        uint256 _amount
    ) external;

    function transfer(
        address _holder,
        uint256 _projectId,
        uint256 _amount,
        address _recipient
    ) external;
}

// File: contracts/interfaces/IFundingCycles.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "./IPrices.sol";
import "./IProjects.sol";
import "./IFundingCycleBallot.sol";

/// @notice The funding cycle structure represents a project stewarded by an address, and accounts for which addresses have helped sustain the project.
struct FundingCycle {
    // A unique number that's incremented for each new funding cycle, starting with 1.
    uint256 id;
    // The ID of the project contract that this funding cycle belongs to.
    uint256 projectId;
    // The number of this funding cycle for the project.
    uint256 number;
    // The ID of a previous funding cycle that this one is based on.
    uint256 basedOn;
    // The time when this funding cycle was last configured.
    uint256 configured;
    // The number of cycles that this configuration should last for before going back to the last permanent.
    uint256 cycleLimit;
    // A number determining the amount of redistribution shares this funding cycle will issue to each sustainer.
    uint256 weight;
    // The ballot contract to use to determine a subsequent funding cycle's reconfiguration status.
    IFundingCycleBallot ballot;
    // The time when this funding cycle will become active.
    uint256 start;
    // The number of seconds until this funding cycle's surplus is redistributed.
    uint256 duration;
    // The amount that this funding cycle is targeting in terms of the currency.
    uint256 target;
    // The currency that the target is measured in.
    uint256 currency;
    // The percentage of each payment to send as a fee to the Juicebox admin.
    uint256 fee;
    // A percentage indicating how much more weight to give a funding cycle compared to its predecessor.
    uint256 discountRate;
    // The amount of available funds that have been tapped by the project in terms of the currency.
    uint256 tapped;
    // A packed list of extra data. The first 8 bytes are reserved for versioning.
    uint256 metadata;
}

struct FundingCycleProperties {
    uint256 target;
    uint256 currency;
    uint256 duration;
    uint256 cycleLimit;
    uint256 discountRate;
    IFundingCycleBallot ballot;
}

interface IFundingCycles {
    event Configure(
        uint256 indexed fundingCycleId,
        uint256 indexed projectId,
        uint256 reconfigured,
        FundingCycleProperties _properties,
        uint256 metadata,
        address caller
    );

    event Tap(
        uint256 indexed fundingCycleId,
        uint256 indexed projectId,
        uint256 amount,
        uint256 newTappedAmount,
        address caller
    );

    event Init(
        uint256 indexed fundingCycleId,
        uint256 indexed projectId,
        uint256 number,
        uint256 previous,
        uint256 weight,
        uint256 start
    );

    function latestIdOf(uint256 _projectId) external view returns (uint256);

    function count() external view returns (uint256);

    function BASE_WEIGHT() external view returns (uint256);

    function MAX_CYCLE_LIMIT() external view returns (uint256);

    function get(uint256 _fundingCycleId)
        external
        view
        returns (FundingCycle memory);

    function queuedOf(uint256 _projectId)
        external
        view
        returns (FundingCycle memory);

    function currentOf(uint256 _projectId)
        external
        view
        returns (FundingCycle memory);

    function currentBallotStateOf(uint256 _projectId)
        external
        view
        returns (BallotState);

    function configure(
        uint256 _projectId,
        FundingCycleProperties calldata _properties,
        uint256 _metadata,
        uint256 _fee,
        bool _configureActiveFundingCycle
    ) external returns (FundingCycle memory fundingCycle);

    function tap(uint256 _projectId, uint256 _amount)
        external
        returns (FundingCycle memory fundingCycle);
}

// File: contracts/interfaces/IYielder.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

import "./ITerminalV1.sol";

// In constructure, give unlimited access for TerminalV1 to take money from this.
interface IYielder {
    function deposited() external view returns (uint256);

    function getCurrentBalance() external view returns (uint256);

    function deposit() external payable;

    function withdraw(uint256 _amount, address payable _beneficiary) external;

    function withdrawAll(address payable _beneficiary)
        external
        returns (uint256);
}

// File: contracts/interfaces/IModStore.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "./IOperatorStore.sol";
import "./IProjects.sol";
import "./IModAllocator.sol";

struct PayoutMod {
    bool preferUnstaked;
    uint16 percent;
    uint48 lockedUntil;
    address payable beneficiary;
    IModAllocator allocator;
    uint56 projectId;
}

struct TicketMod {
    bool preferUnstaked;
    uint16 percent;
    uint48 lockedUntil;
    address payable beneficiary;
}

interface IModStore {
    event SetPayoutMod(
        uint256 indexed projectId,
        uint256 indexed configuration,
        PayoutMod mods,
        address caller
    );

    event SetTicketMod(
        uint256 indexed projectId,
        uint256 indexed configuration,
        TicketMod mods,
        address caller
    );

    function projects() external view returns (IProjects);

    function payoutModsOf(uint256 _projectId, uint256 _configuration)
        external
        view
        returns (PayoutMod[] memory);

    function ticketModsOf(uint256 _projectId, uint256 _configuration)
        external
        view
        returns (TicketMod[] memory);

    function setPayoutMods(
        uint256 _projectId,
        uint256 _configuration,
        PayoutMod[] memory _mods
    ) external;

    function setTicketMods(
        uint256 _projectId,
        uint256 _configuration,
        TicketMod[] memory _mods
    ) external;
}

// File: contracts/interfaces/ITickets.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface ITickets is IERC20 {
    function print(address _account, uint256 _amount) external;

    function redeem(address _account, uint256 _amount) external;
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// File: contracts/interfaces/IFundingCycleBallot.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "./ITerminalV1.sol";

enum BallotState {
    Approved,
    Active,
    Failed,
    Standby
}

interface IFundingCycleBallot {
    function duration() external view returns (uint256);

    function state(uint256 _fundingCycleId, uint256 _configured)
        external
        view
        returns (BallotState);
}

// File: contracts/interfaces/IModAllocator.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

interface IModAllocator {
    event Allocate(
        uint256 indexed projectId,
        uint256 indexed forProjectId,
        address indexed beneficiary,
        uint256 amount,
        address caller
    );

    function allocate(
        uint256 _projectId,
        uint256 _forProjectId,
        address _beneficiary
    ) external payable;
}