Contract 0x4ab2fc6e258a0ca7175d05ff10c5cf798a672cae 20

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.10;

import "../interfaces/IFuroStream.sol";


// Use the FuroStreamRouter to create Streams and do not create streams directly.

contract FuroStream is
    IFuroStream,
    ERC721("Furo Stream", "FUROSTREAM"),
    Multicall,
    BoringOwnable
{
    IBentoBoxMinimal public immutable bentoBox;
    address public immutable wETH;

    uint256 public streamIds;

    address public tokenURIFetcher;

    mapping(uint256 => Stream) public streams;

    // custom errors
    error NotSenderOrRecipient();
    error InvalidStartTime();
    error InvalidEndTime();
    error InvalidWithdrawTooMuch();
    error NotSender();
    error Overflow();

    constructor(IBentoBoxMinimal _bentoBox, address _wETH) {
        bentoBox = _bentoBox;
        wETH = _wETH;
        streamIds = 1000;
        _bentoBox.registerProtocol();
    }

    function setTokenURIFetcher(address _fetcher) external onlyOwner {
        tokenURIFetcher = _fetcher;
    }

    function tokenURI(uint256 id) public view override returns (string memory) {
        return ITokenURIFetcher(tokenURIFetcher).fetchTokenURIData(id);
    }

    function setBentoBoxApproval(
        address user,
        bool approved,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external payable override {
        bentoBox.setMasterContractApproval(
            user,
            address(this),
            approved,
            v,
            r,
            s
        );
    }

    function createStream(
        address recipient,
        address token,
        uint64 startTime,
        uint64 endTime,
        uint256 amount, /// @dev in token amount and not in shares
        bool fromBentoBox
    )
        external
        payable
        override
        returns (uint256 streamId, uint256 depositedShares)
    {
        if (startTime < block.timestamp) revert InvalidStartTime();
        if (endTime <= startTime) revert InvalidEndTime();

        depositedShares = _depositToken(
            token,
            msg.sender,
            address(this),
            amount,
            fromBentoBox
        );

        streamId = streamIds++;

        _mint(recipient, streamId);

        streams[streamId] = Stream({
            sender: msg.sender,
            token: token == address(0) ? wETH : token,
            depositedShares: uint128(depositedShares), // @dev safe since we know bento returns u128
            withdrawnShares: 0,
            startTime: startTime,
            endTime: endTime
        });

        emit CreateStream(
            streamId,
            msg.sender,
            recipient,
            token,
            depositedShares,
            startTime,
            endTime,
            fromBentoBox
        );
    }

    function withdrawFromStream(
        uint256 streamId,
        uint256 sharesToWithdraw,
        address withdrawTo,
        bool toBentoBox,
        bytes calldata taskData
    ) external override returns (uint256 recipientBalance, address to) {
        address recipient = ownerOf[streamId];
        if (msg.sender != streams[streamId].sender && msg.sender != recipient) {
            revert NotSenderOrRecipient();
        }
        Stream storage stream = streams[streamId];
        (, recipientBalance) = _streamBalanceOf(stream);
        if (recipientBalance < sharesToWithdraw)
            revert InvalidWithdrawTooMuch();
        stream.withdrawnShares += uint128(sharesToWithdraw);

        if (msg.sender == recipient && withdrawTo != address(0)) {
            to = withdrawTo;
        } else {
            to = recipient;
        }

        _transferToken(
            stream.token,
            address(this),
            to,
            sharesToWithdraw,
            toBentoBox
        );

        if (taskData.length != 0 && msg.sender == recipient)
            ITasker(to).onTaskReceived(taskData);

        emit Withdraw(
            streamId,
            sharesToWithdraw,
            withdrawTo,
            stream.token,
            toBentoBox
        );
    }

    function cancelStream(uint256 streamId, bool toBentoBox)
        external
        override
        returns (uint256 senderBalance, uint256 recipientBalance)
    {
        address recipient = ownerOf[streamId];
        if (msg.sender != streams[streamId].sender && msg.sender != recipient) {
            revert NotSenderOrRecipient();
        }
        Stream memory stream = streams[streamId];
        (senderBalance, recipientBalance) = _streamBalanceOf(stream);

        delete streams[streamId];

        _transferToken(
            stream.token,
            address(this),
            recipient,
            recipientBalance,
            toBentoBox
        );
        _transferToken(
            stream.token,
            address(this),
            stream.sender,
            senderBalance,
            toBentoBox
        );

        emit CancelStream(
            streamId,
            senderBalance,
            recipientBalance,
            stream.token,
            toBentoBox
        );
    }

    function getStream(uint256 streamId)
        external
        view
        override
        returns (Stream memory)
    {
        return streams[streamId];
    }

    function streamBalanceOf(uint256 streamId)
        external
        view
        override
        returns (uint256 senderBalance, uint256 recipientBalance)
    {
        return _streamBalanceOf(streams[streamId]);
    }

    function _streamBalanceOf(Stream memory stream)
        internal
        view
        returns (uint256 senderBalance, uint256 recipientBalance)
    {
        if (block.timestamp <= stream.startTime) {
            senderBalance = stream.depositedShares;
            recipientBalance = 0;
        } else if (stream.endTime <= block.timestamp) {
            recipientBalance = stream.depositedShares - stream.withdrawnShares;
            senderBalance = 0;
        } else {
            uint64 timeDelta = uint64(block.timestamp) - stream.startTime;
            uint128 streamed = ((stream.depositedShares * timeDelta) /
                (stream.endTime - stream.startTime));
            recipientBalance = streamed - stream.withdrawnShares;
            senderBalance = stream.depositedShares - streamed;
        }
    }

    function updateSender(uint256 streamId, address sender) external override {
        Stream storage stream = streams[streamId];
        if (msg.sender != stream.sender) revert NotSender();
        stream.sender = sender;
    }

    function updateStream(
        uint256 streamId,
        uint128 topUpAmount,
        uint64 extendTime,
        bool fromBentoBox
    ) external payable override returns (uint256 depositedShares) {
        Stream storage stream = streams[streamId];
        if (msg.sender != stream.sender) revert NotSender();

        depositedShares = _depositToken(
            stream.token,
            stream.sender,
            address(this),
            topUpAmount,
            fromBentoBox
        );

        address recipient = ownerOf[streamId];

        (uint256 senderBalance, uint256 recipientBalance) = _streamBalanceOf(
            stream
        );

        stream.startTime = uint64(block.timestamp);
        stream.withdrawnShares = 0;
        uint256 newDepositedShares = senderBalance + depositedShares;
        if (newDepositedShares > type(uint128).max) revert Overflow();
        stream.depositedShares = uint128(newDepositedShares);
        stream.endTime += extendTime;

        _transferToken(
            stream.token,
            address(this),
            recipient,
            recipientBalance,
            true
        );

        emit UpdateStream(streamId, topUpAmount, extendTime, fromBentoBox);
    }

    function _depositToken(
        address token,
        address from,
        address to,
        uint256 amount,
        bool fromBentoBox
    ) internal returns (uint256 depositedShares) {
        if (fromBentoBox) {
            depositedShares = bentoBox.toShare(token, amount, false);
            bentoBox.transfer(token, from, to, depositedShares);
        } else {
            (, depositedShares) = bentoBox.deposit{
                value: token == address(0) ? amount : 0
            }(token, from, to, amount, 0);
        }
    }

    function _transferToken(
        address token,
        address from,
        address to,
        uint256 share,
        bool toBentoBox
    ) internal {
        if (toBentoBox) {
            bentoBox.transfer(token, from, to, share);
        } else {
            bentoBox.withdraw(token, from, to, 0, share);
        }
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.10;

import "./ITasker.sol";
import "./ITokenURIFetcher.sol";
import "./IBentoBoxMinimal.sol";
import "../utils/Multicall.sol";
import "../utils/BoringOwnable.sol";
import "@rari-capital/solmate/src/tokens/ERC721.sol";

interface IFuroStream {
    function setBentoBoxApproval(
        address user,
        bool approved,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external payable;

    function createStream(
        address recipient,
        address token,
        uint64 startTime,
        uint64 endTime,
        uint256 amount, /// @dev in token amount and not in shares
        bool fromBento
    ) external payable returns (uint256 streamId, uint256 depositedShares);

    function withdrawFromStream(
        uint256 streamId,
        uint256 sharesToWithdraw,
        address withdrawTo,
        bool toBentoBox,
        bytes memory taskData
    ) external returns (uint256 recipientBalance, address to);

    function cancelStream(uint256 streamId, bool toBentoBox)
        external
        returns (uint256 senderBalance, uint256 recipientBalance);

    function updateSender(uint256 streamId, address sender) external;

    function updateStream(
        uint256 streamId,
        uint128 topUpAmount,
        uint64 extendTime,
        bool fromBentoBox
    ) external payable returns (uint256 depositedShares);

    function streamBalanceOf(uint256 streamId)
        external
        view
        returns (uint256 senderBalance, uint256 recipientBalance);

    function getStream(uint256 streamId) external view returns (Stream memory);

    event CreateStream(
        uint256 indexed streamId,
        address indexed sender,
        address indexed recipient,
        address token,
        uint256 amount,
        uint256 startTime,
        uint256 endTime,
        bool fromBentoBox
    );

    event UpdateStream(
        uint256 indexed streamId,
        uint128 indexed topUpAmount,
        uint64 indexed extendTime,
        bool fromBentoBox
    );

    event Withdraw(
        uint256 indexed streamId,
        uint256 indexed sharesToWithdraw,
        address indexed withdrawTo,
        address token,
        bool toBentoBox
    );

    event CancelStream(
        uint256 indexed streamId,
        uint256 indexed senderBalance,
        uint256 indexed recipientBalance,
        address token,
        bool toBentoBox
    );

    struct Stream {
        address sender;
        address token;
        uint128 depositedShares;
        uint128 withdrawnShares;
        uint64 startTime;
        uint64 endTime;
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.10;

interface ITasker {
    function onTaskReceived(
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.10;

interface ITokenURIFetcher {
    function fetchTokenURIData(uint256 id)
        external
        view
        returns (string memory);
}

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.10;

/// @notice Minimal BentoBox vault interface.
/// @dev `token` is aliased as `address` from `IERC20` for simplicity.
interface IBentoBoxMinimal {
    /// @notice Balance per ERC-20 token per account in shares.
    function balanceOf(address, address) external view returns (uint256);

    /// @dev Helper function to represent an `amount` of `token` in shares.
    /// @param token The ERC-20 token.
    /// @param amount The `token` amount.
    /// @param roundUp If the result `share` should be rounded up.
    /// @return share The token amount represented in shares.
    function toShare(
        address token,
        uint256 amount,
        bool roundUp
    ) external view returns (uint256 share);

    /// @dev Helper function to represent shares back into the `token` amount.
    /// @param token The ERC-20 token.
    /// @param share The amount of shares.
    /// @param roundUp If the result should be rounded up.
    /// @return amount The share amount back into native representation.
    function toAmount(
        address token,
        uint256 share,
        bool roundUp
    ) external view returns (uint256 amount);

    /// @notice Registers this contract so that users can approve it for BentoBox.
    function registerProtocol() external;

    /// @notice Deposit an amount of `token` represented in either `amount` or `share`.
    /// @param token_ The ERC-20 token to deposit.
    /// @param from which account to pull the tokens.
    /// @param to which account to push the tokens.
    /// @param amount Token amount in native representation to deposit.
    /// @param share Token amount represented in shares to deposit. Takes precedence over `amount`.
    /// @return amountOut The amount deposited.
    /// @return shareOut The deposited amount represented in shares.
    function deposit(
        address token_,
        address from,
        address to,
        uint256 amount,
        uint256 share
    ) external payable returns (uint256 amountOut, uint256 shareOut);

    /// @notice Withdraws an amount of `token` from a user account.
    /// @param token_ The ERC-20 token to withdraw.
    /// @param from which user to pull the tokens.
    /// @param to which user to push the tokens.
    /// @param amount of tokens. Either one of `amount` or `share` needs to be supplied.
    /// @param share Like above, but `share` takes precedence over `amount`.
    function withdraw(
        address token_,
        address from,
        address to,
        uint256 amount,
        uint256 share
    ) external returns (uint256 amountOut, uint256 shareOut);

    /// @notice Transfer shares from a user account to another one.
    /// @param token The ERC-20 token to transfer.
    /// @param from which user to pull the tokens.
    /// @param to which user to push the tokens.
    /// @param share The amount of `token` in shares.
    function transfer(
        address token,
        address from,
        address to,
        uint256 share
    ) external;

    function setMasterContractApproval(
        address user,
        address masterContract,
        bool approved,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity 0.8.10;

/// @title Multicall
/// @notice Enables calling multiple methods in a single call to the contract
abstract contract Multicall {
    function multicall(bytes[] calldata data)
        public
        payable
        returns (bytes[] memory results)
    {
        results = new bytes[](data.length);
        for (uint256 i = 0; i < data.length; i++) {
            (bool success, bytes memory result) = address(this).delegatecall(
                data[i]
            );

            if (!success) {
                // Next 5 lines from https://ethereum.stackexchange.com/a/83577
                if (result.length < 68) revert();
                assembly {
                    result := add(result, 0x04)
                }
                revert(abi.decode(result, (string)));
            }

            results[i] = result;
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.6.12;

// Audit on 5-Jan-2021 by Keno and BoringCrypto
// Source: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol + Claimable.sol
// Edited by BoringCrypto

contract BoringOwnableData {
    address public owner;
    address public pendingOwner;
}

contract BoringOwnable is BoringOwnableData {
    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    /// @notice `owner` defaults to msg.sender on construction.
    constructor() {
        owner = msg.sender;
        emit OwnershipTransferred(address(0), msg.sender);
    }

    /// @notice Transfers ownership to `newOwner`. Either directly or claimable by the new pending owner.
    /// Can only be invoked by the current `owner`.
    /// @param newOwner Address of the new owner.
    /// @param direct True if `newOwner` should be set immediately. False if `newOwner` needs to use `claimOwnership`.
    /// @param renounce Allows the `newOwner` to be `address(0)` if `direct` and `renounce` is True. Has no effect otherwise.
    function transferOwnership(
        address newOwner,
        bool direct,
        bool renounce
    ) public onlyOwner {
        if (direct) {
            // Checks
            require(
                newOwner != address(0) || renounce,
                "Ownable: zero address"
            );

            // Effects
            emit OwnershipTransferred(owner, newOwner);
            owner = newOwner;
            pendingOwner = address(0);
        } else {
            // Effects
            pendingOwner = newOwner;
        }
    }

    /// @notice Needs to be called by `pendingOwner` to claim ownership.
    function claimOwnership() public {
        address _pendingOwner = pendingOwner;

        // Checks
        require(
            msg.sender == _pendingOwner,
            "Ownable: caller != pending owner"
        );

        // Effects
        emit OwnershipTransferred(owner, _pendingOwner);
        owner = _pendingOwner;
        pendingOwner = address(0);
    }

    /// @notice Only allows the `owner` to execute the function.
    modifier onlyOwner() {
        require(msg.sender == owner, "Ownable: caller is not the owner");
        _;
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern, minimalist, and gas efficient ERC-721 implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC721.sol)
/// @dev Note that balanceOf does not revert if passed the zero address, in defiance of the ERC.
abstract contract ERC721 {
    /*///////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Transfer(address indexed from, address indexed to, uint256 indexed id);

    event Approval(address indexed owner, address indexed spender, uint256 indexed id);

    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /*///////////////////////////////////////////////////////////////
                          METADATA STORAGE/LOGIC
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    function tokenURI(uint256 id) public view virtual returns (string memory);

    /*///////////////////////////////////////////////////////////////
                            ERC721 STORAGE                        
    //////////////////////////////////////////////////////////////*/

    mapping(address => uint256) public balanceOf;

    mapping(uint256 => address) public ownerOf;

    mapping(uint256 => address) public getApproved;

    mapping(address => mapping(address => bool)) public isApprovedForAll;

    /*///////////////////////////////////////////////////////////////
                              CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(string memory _name, string memory _symbol) {
        name = _name;
        symbol = _symbol;
    }

    /*///////////////////////////////////////////////////////////////
                              ERC721 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 id) public virtual {
        address owner = ownerOf[id];

        require(msg.sender == owner || isApprovedForAll[owner][msg.sender], "NOT_AUTHORIZED");

        getApproved[id] = spender;

        emit Approval(owner, spender, id);
    }

    function setApprovalForAll(address operator, bool approved) public virtual {
        isApprovedForAll[msg.sender][operator] = approved;

        emit ApprovalForAll(msg.sender, operator, approved);
    }

    function transferFrom(
        address from,
        address to,
        uint256 id
    ) public virtual {
        require(from == ownerOf[id], "WRONG_FROM");

        require(to != address(0), "INVALID_RECIPIENT");

        require(
            msg.sender == from || msg.sender == getApproved[id] || isApprovedForAll[from][msg.sender],
            "NOT_AUTHORIZED"
        );

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        unchecked {
            balanceOf[from]--;

            balanceOf[to]++;
        }

        ownerOf[id] = to;

        delete getApproved[id];

        emit Transfer(from, to, id);
    }

    function safeTransferFrom(
        address from,
        address to,
        uint256 id
    ) public virtual {
        transferFrom(from, to, id);

        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, "") ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }

    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        bytes memory data
    ) public virtual {
        transferFrom(from, to, id);

        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, data) ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }

    /*///////////////////////////////////////////////////////////////
                              ERC165 LOGIC
    //////////////////////////////////////////////////////////////*/

    function supportsInterface(bytes4 interfaceId) public pure virtual returns (bool) {
        return
            interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
            interfaceId == 0x80ac58cd || // ERC165 Interface ID for ERC721
            interfaceId == 0x5b5e139f; // ERC165 Interface ID for ERC721Metadata
    }

    /*///////////////////////////////////////////////////////////////
                       INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 id) internal virtual {
        require(to != address(0), "INVALID_RECIPIENT");

        require(ownerOf[id] == address(0), "ALREADY_MINTED");

        // Counter overflow is incredibly unrealistic.
        unchecked {
            balanceOf[to]++;
        }

        ownerOf[id] = to;

        emit Transfer(address(0), to, id);
    }

    function _burn(uint256 id) internal virtual {
        address owner = ownerOf[id];

        require(ownerOf[id] != address(0), "NOT_MINTED");

        // Ownership check above ensures no underflow.
        unchecked {
            balanceOf[owner]--;
        }

        delete ownerOf[id];

        delete getApproved[id];

        emit Transfer(owner, address(0), id);
    }

    /*///////////////////////////////////////////////////////////////
                       INTERNAL SAFE MINT LOGIC
    //////////////////////////////////////////////////////////////*/

    function _safeMint(address to, uint256 id) internal virtual {
        _mint(to, id);

        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, "") ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }

    function _safeMint(
        address to,
        uint256 id,
        bytes memory data
    ) internal virtual {
        _mint(to, id);

        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, data) ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }
}

/// @notice A generic interface for a contract which properly accepts ERC721 tokens.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC721.sol)
interface ERC721TokenReceiver {
    function onERC721Received(
        address operator,
        address from,
        uint256 id,
        bytes calldata data
    ) external returns (bytes4);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 999999
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

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0000000000000000000000000319000133d3ada02600f0875d2cf03d442c33670000000000000000000000000d500b1d8e8ef31e21c99d1db9a6444d3adf1270

-----Decoded View---------------
Arg [0] : _bentoBox (address): 0x0319000133d3ada02600f0875d2cf03d442c3367
Arg [1] : _wETH (address): 0x0d500b1d8e8ef31e21c99d1db9a6444d3adf1270

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000000319000133d3ada02600f0875d2cf03d442c3367
Arg [1] : 0000000000000000000000000d500b1d8e8ef31e21c99d1db9a6444d3adf1270