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// SPDX-License-Identifier: MIT

pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/drafts/IERC20Permit.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "../farm/facets/DepotFacet.sol";
import "../interfaces/IBeanstalkTransfer.sol";
import "../interfaces/IERC4494.sol";
import "../libraries/LibFunction.sol";

/**
 * @title Depot
 * @author Publius
 * @notice Depot wraps Pipeline's Pipe functions to facilitate the loading of non-Ether assets in Pipeline
 * in the same transaction that loads Ether, Pipes calls to other protocols and unloads Pipeline.
 * https://evmpipeline.org
**/

contract Depot is DepotFacet {

    using SafeERC20 for IERC20;

    IBeanstalkTransfer private constant beanstalk =
        IBeanstalkTransfer(0xC1E088fC1323b20BCBee9bd1B9fC9546db5624C5);

    /**
     * 
     * Farm
     * 
    **/

    /**
     * @notice Execute multiple function calls in Depot.
     * @param data list of encoded function calls to be executed
     * @return results list of return data from each function call
     * @dev Implementation from https://github.com/Uniswap/v3-periphery/blob/main/contracts/base/Multicall.sol.
    **/
    function farm(bytes[] calldata data)
        external
        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]);
            LibFunction.checkReturn(success, result);
            results[i] = result;
        }
    }

    /**
     *
     * Transfer
     *
    **/

    /**
     * @notice Execute a Beanstalk ERC-20 token transfer.
     * @dev See {TokenFacet-transferToken}.
     * @dev Only supports INTERNAL and EXTERNAL From modes.
    **/
    function transferToken(
        IERC20 token,
        address recipient,
        uint256 amount,
        From fromMode,
        To toMode
    ) external payable {
        if (fromMode == From.EXTERNAL) {
            token.safeTransferFrom(msg.sender, recipient, amount);
        } else if (fromMode == From.INTERNAL) {
            beanstalk.transferInternalTokenFrom(token, msg.sender, recipient, amount, toMode);
        } else {
            revert("Mode not supported");
        }
    }

    /**
     * @notice Execute an ERC-721 token transfer
     * @dev Wraps {IERC721-safeBatchTransferFrom}.
    **/
    function transferERC721(
        IERC721 token,
        address to,
        uint256 id
    ) external payable {
        token.safeTransferFrom(msg.sender, to, id);
    }

    /**
     * @notice Execute an ERC-1155 token transfer of a single Id.
     * @dev Wraps {IERC1155-safeTransferFrom}.
    **/
    function transferERC1155(
        IERC1155 token,
        address to,
        uint256 id,
        uint256 value
    ) external payable {
        token.safeTransferFrom(msg.sender, to, id, value, new bytes(0));
    }

    /**
     * @notice Execute an ERC-1155 token transfer of multiple Ids.
     * @dev Wraps {IERC1155-safeBatchTransferFrom}.
    **/
    function batchTransferERC1155(
        IERC1155 token,
        address to,
        uint256[] calldata ids,
        uint256[] calldata values
    ) external payable {
        token.safeBatchTransferFrom(msg.sender, to, ids, values, new bytes(0));
    }

    /**
     * @notice Execute a single Beanstalk Deposit transfer.
     * @dev See {SiloFacet-transferDeposit}.
    **/
    function transferDeposit(
        address sender,
        address recipient,
        address token,
        uint32 season,
        uint256 amount
    ) external payable returns (uint256 bdv) {
        require(sender == msg.sender, "invalid sender");
        bdv = beanstalk.transferDeposit(msg.sender, recipient, token, season, amount);
    }

    /**
     * @notice Execute multiple Beanstalk Deposit transfers of a single Whitelisted Tokens.
     * @dev See {SiloFacet-transferDeposits}.
    **/
    function transferDeposits(
        address sender,
        address recipient,
        address token,
        uint32[] calldata seasons,
        uint256[] calldata amounts
    ) external payable returns (uint256[] memory bdvs) {
        require(sender == msg.sender, "invalid sender");
        bdvs = beanstalk.transferDeposits(msg.sender, recipient, token, seasons, amounts);
    }

    /**
     *
     * Permits
     *
    **/

    /**
     * @notice Execute a permit for an ERC-20 token.
     * @dev See {IERC20Permit-permit}.
    **/
    function permitERC20(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external payable {
        token.permit(owner, spender, value, deadline, v, r, s);
    }

    /**
     * @notice Execute a permit for an ERC-20 Token stored in a Beanstalk Farm balance.
     * @dev See {TokenFacet-permitToken}.
    **/
    function permitToken(
        address owner,
        address spender,
        address token,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external payable {
        beanstalk.permitToken(owner, spender, token, value, deadline, v, r, s);
    }

    /**
     * @notice Execute a permit for an ERC-721 token.
     * @dev See {IERC4494-permit}.
    **/
    function permitERC721(
        IERC4494 token,
        address spender,
        uint256 tokenId,
        uint256 deadline,
        bytes memory sig
    ) external payable {
        token.permit(spender, tokenId, deadline, sig);
    }

    /**
     * @notice Execute a permit for Beanstalk Deposits of a single Whitelisted Token.
     * @dev See {SiloFacet-permitDeposit}.
    **/
    function permitDeposit(
        address owner,
        address spender,
        address token,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external payable {
        beanstalk.permitDeposit(owner, spender, token, value, deadline, v, r, s);
    }

    /**
     * @notice Execute a permit for a Beanstalk Deposits of a multiple Whitelisted Tokens.
     * @dev See {SiloFacet-permitDeposits}.
    **/
    function permitDeposits(
        address owner,
        address spender,
        address[] calldata tokens,
        uint256[] calldata values,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external payable {
        beanstalk.permitDeposits(owner, spender, tokens, values, deadline, v, r, s);
    }
}

// SPDX-License-Identifier: MIT
pragma experimental ABIEncoderV2;
pragma solidity =0.7.6;

import "@openzeppelin/contracts/drafts/IERC20Permit.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

enum From {
    EXTERNAL,
    INTERNAL,
    EXTERNAL_INTERNAL,
    INTERNAL_TOLERANT
}
enum To {
    EXTERNAL,
    INTERNAL
}

interface IBeanstalkTransfer {
    function transferInternalTokenFrom(
        IERC20 token,
        address sender,
        address recipient,
        uint256 amount,
        To toMode
    ) external payable;

    function permitToken(
        address owner,
        address spender,
        address token,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external payable;

    function transferDeposit(
        address sender,
        address recipient,
        address token,
        uint32 season,
        uint256 amount
    ) external payable returns (uint256 bdv);

    function transferDeposits(
        address sender,
        address recipient,
        address token,
        uint32[] calldata seasons,
        uint256[] calldata amounts
    ) external payable returns (uint256[] memory bdvs);

    function permitDeposits(
        address owner,
        address spender,
        address[] calldata tokens,
        uint256[] calldata values,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external payable;

    function permitDeposit(
        address owner,
        address spender,
        address token,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external payable;
}

/*
 SPDX-License-Identifier: MIT
*/

pragma solidity =0.7.6;
pragma experimental ABIEncoderV2;

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

/**
 * @title Lib Function
 * @author Publius
 **/

library LibFunction {
    /**
     * @notice Checks The return value of a any function call for success, if not returns the error returned in `results`
     * @param success Whether the corresponding function call succeeded
     * @param result The return data of the corresponding function call
    **/
    function checkReturn(bool success, bytes memory result) internal pure {
        if (!success) {
            // Next 5 lines from https://ethereum.stackexchange.com/a/83577
            // Also, used in Uniswap V3 https://github.com/Uniswap/v3-periphery/blob/main/contracts/base/Multicall.sol#L17
            if (result.length < 68) revert();
            assembly {
                result := add(result, 0x04)
            }
            revert(abi.decode(result, (string)));
        }
    }

    /**
     * @notice Gets the facet address for a given selector
     * @param selector The function selector to fetch the facet address for
     * @dev Fails if no set facet address
     * @return facet The facet address
    **/
    function facetForSelector(bytes4 selector)
        internal
        view
        returns (address facet)
    {
        LibDiamond.DiamondStorage storage ds = LibDiamond.diamondStorage();
        facet = ds.selectorToFacetAndPosition[selector].facetAddress;
        require(facet != address(0), "Diamond: Function does not exist");
    }

    /** @notice Use a Clipboard on callData to copy return values stored as returnData from any Advanced Calls
     * that have already been executed and paste them into the callData of the next Advanced Call, in a customizable manner
     * @param callData The callData bytes of next Advanced Call to paste onto
     * @param clipboard 0, 1 or n encoded paste operations and encoded ether value if using Pipeline
     * -------------------------------------------------------------------------------------
     * Clipboard stores the bytes:
     * [ Type   | Use Ether Flag*  | Type data      | Ether Value (only if flag == 1)*]
     * [ 1 byte | 1 byte           | n bytes        | 0 or 32 bytes                   ]
     * * Use Ether Flag and Ether Value are processed in Pipeline.sol (Not used in Farm). See Pipeline.getEthValue for ussage.
     * Type: 0x00, 0x01 or 0x002
     *  - 0x00: 0 Paste Operations (Logic in Pipeline.sol and FarmFacet.sol)
     *  - 0x01: 1 Paste Operation
     *  - 0x02: n Paste Operations
     * Type Data: There are two types with type data: 0x01, 0x02
     *  Type 1 (0x01): Copy 1 bytes32 from a previous function return value
     *       [ pasteParams ]
     *       [ 32 bytes ]
     *      Note: Should be encoded with ['bytes2', 'uint80', 'uint80', 'uint80']  where the first two bytes are Type and Send Ether Flag if using Pipeline
     *  Type 2 (0x02): Copy n bytes32 from a previous function return value
     *       [ Padding      | pasteParams[] ]
     *       [ 32 bytes     | 32 + 32 * n   ]
     *        * The first 32 bytes are the length of the array.
     * -------------------------------------------------------------------------------------
     * @param returnData A list of return values from previously executed Advanced Calls
     @return data The function call return datas
    **/
    function useClipboard(
        bytes calldata callData,
        bytes calldata clipboard,
        bytes[] memory returnData
    ) internal pure returns (bytes memory data) {
        bytes1 typeId = clipboard[0];
        if (typeId == 0x01) {
            bytes32 pasteParams = abi.decode(clipboard, (bytes32));
            data = LibFunction.pasteAdvancedBytes(callData, returnData, pasteParams);
        } else if (typeId == 0x02) {
            (, bytes32[] memory pasteParams) = abi.decode(
                clipboard,
                (uint256, bytes32[])
            );
            data = callData;
            for (uint256 i; i < pasteParams.length; i++)
                data = LibFunction.pasteAdvancedBytes(data, returnData, pasteParams[i]);
        } else {
            revert("Function: Advanced Type not supported");
        }
    }

    /**
     * @notice Copies 32 bytes from returnData into callData determined by pasteParams
     * @param callData The callData bytes of the next function call
     * @param returnData A list of bytes corresponding to return data from previous function calls in the transaction
     * @param pasteParams Denotes which data should be copied and where it should be pasted
     * Should be in the following format
     * [2 bytes | 10 bytes         | 10 bytes  | 10 bytes   ]
     * [ N/A    | returnDataIndex  | copyIndex | pasteIndex ]
     * @return pastedData the calldata for the next function call with bytes pasted from returnData
     **/
    function pasteAdvancedBytes(
        bytes memory callData,
        bytes[] memory returnData,
        bytes32 pasteParams
    ) internal pure returns (bytes memory pastedData) {
        // Shift `pasteParams` right 22 bytes to insolated reduceDataIndex
        bytes memory copyData = returnData[uint256((pasteParams << 16) >> 176)];
        pastedData = paste32Bytes(
            copyData,
            callData,
            uint256((pasteParams << 96) >> 176), // Isolate copyIndex
            uint256((pasteParams << 176) >> 176) // Isolate pasteIndex
        );
    }

    /**
     * @notice Copy 32 Bytes from copyData at copyIndex and paste into pasteData at pasteIndex
     * @param copyData The data bytes to copy from
     * @param pasteData The data bytes to paste into
     * @param copyIndex The index in copyData to copying from
     * @param pasteIndex The index in pasteData to paste into
     * @return pastedData The data with the copied with 32 bytes
    **/
    function paste32Bytes(
        bytes memory copyData,
        bytes memory pasteData,
        uint256 copyIndex,
        uint256 pasteIndex
    ) internal pure returns (bytes memory pastedData) {
        assembly {
            mstore(add(pasteData, pasteIndex), mload(add(copyData, copyIndex)))
        }
        pastedData = pasteData;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/introspection/IERC165.sol";

/// Implementation from https://eips.ethereum.org/EIPS/eip-4494
/// @dev Interface for token permits for ERC-721
///
interface IERC4494 is IERC165{
  /// ERC165 bytes to add to interface array - set in parent contract
  ///
  /// _INTERFACE_ID_ERC4494 = 0x5604e225

  /// @notice Function to approve by way of owner signature
  /// @param spender the address to approve
  /// @param tokenId the index of the NFT to approve the spender on
  /// @param deadline a timestamp expiry for the permit
  /// @param sig a traditional or EIP-2098 signature
  function permit(address spender, uint256 tokenId, uint256 deadline, bytes memory sig) external;
  /// @notice Returns the nonce of an NFT - useful for creating permits
  /// @param tokenId the index of the NFT to get the nonce of
  /// @return the uint256 representation of the nonce
  function nonces(uint256 tokenId) external view returns(uint256);
  /// @notice Returns the domain separator used in the encoding of the signature for permits, as defined by EIP-712
  /// @return the bytes32 domain separator
  function DOMAIN_SEPARATOR() external view returns(bytes32);
}

/**
 * SPDX-License-Identifier: MIT
 **/

pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;

import "../../interfaces/IPipeline.sol";
import "../../libraries/LibFunction.sol";
import "../../libraries/Token/LibEth.sol";

/**
 * @title Depot Facet
 * @author Publius
 * @notice DepotFacet wraps Pipeline's Pipe functions to facilitate the loading of non-Ether assets in Pipeline
 * in the same transaction that loads Ether, Pipes calls to other protocols and unloads Pipeline.
 **/

contract DepotFacet {
    address private constant PIPELINE =
        0xb1bE0000bFdcDDc92A8290202830C4Ef689dCeaa; // TO DO: Update with final address.

    /**
     * @notice Pipe a PipeCall through Pipeline.
     * @param p PipeCall to pipe through Pipeline
     * @return result PipeCall return value
    **/
    function pipe(PipeCall calldata p)
        external
        payable
        returns (bytes memory result)
    {
        result = IPipeline(PIPELINE).pipe(p);
    }

    /**
     * @notice Pipe multiple PipeCalls through Pipeline.
     * Does not support sending Ether in the call
     * @param pipes list of PipeCalls to pipe through Pipeline
     * @return results list of return values from each PipeCall
    **/
    function multiPipe(PipeCall[] calldata pipes)
        external
        payable
        returns (bytes[] memory results)
    {
        results = IPipeline(PIPELINE).multiPipe(pipes);
    }

    /**
     * @notice Pipe multiple AdvancedPipeCalls through Pipeline.
     * @param pipes list of AdvancedPipeCalls to pipe through Pipeline
     * @return results list of return values from each AdvancedPipeCall
    **/
    function advancedPipe(AdvancedPipeCall[] calldata pipes, uint256 value)
        external
        payable
        returns (bytes[] memory results)
    {
        results = IPipeline(PIPELINE).advancedPipe{value: value}(pipes);
        LibEth.refundEth();
    }

    /**
     * @notice Pipe a PipeCall through Pipeline with an Ether value.
     * @param p PipeCall to pipe through Pipeline
     * @param value Ether value to send in Pipecall
     * @return result PipeCall return value
    **/
    function etherPipe(PipeCall calldata p, uint256 value)
        external
        payable
        returns (bytes memory result)
    {
        result = IPipeline(PIPELINE).pipe{value: value}(p);
        LibEth.refundEth();
    }

    /**
     * @notice Return the return value of a PipeCall without executing it.
     * @param p PipeCall to execute with a staticcall
     * @return result PipeCall return value
    **/
    function readPipe(PipeCall calldata p)
        external
        view
        returns (bytes memory result)
    {
        bool success;
        // Use a static call to ensure no state modification
        (success, result) = p.target.staticcall(p.data);
        LibFunction.checkReturn(success, result);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over `owner`'s tokens,
     * given `owner`'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;

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

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

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.2 <0.8.0;

import "../../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;
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.2 <0.8.0;

import "../../introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values);

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data) external;
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    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'
        // solhint-disable-next-line max-line-length
        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).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @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
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <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);
}

/*
 SPDX-License-Identifier: MIT
*/

pragma experimental ABIEncoderV2;
pragma solidity =0.7.6;
/******************************************************************************\
* Author: Nick Mudge <[email protected]> (https://twitter.com/mudgen)
* EIP-2535 Diamonds: https://eips.ethereum.org/EIPS/eip-2535
/******************************************************************************/

import {IDiamondCut} from "../interfaces/IDiamondCut.sol";
import {IDiamondLoupe} from "../interfaces/IDiamondLoupe.sol";
import {IERC165} from "../interfaces/IERC165.sol";

library LibDiamond {
    bytes32 constant DIAMOND_STORAGE_POSITION = keccak256("diamond.standard.diamond.storage");

    struct FacetAddressAndPosition {
        address facetAddress;
        uint96 functionSelectorPosition; // position in facetFunctionSelectors.functionSelectors array
    }

    struct FacetFunctionSelectors {
        bytes4[] functionSelectors;
        uint256 facetAddressPosition; // position of facetAddress in facetAddresses array
    }

    struct DiamondStorage {
        // maps function selector to the facet address and
        // the position of the selector in the facetFunctionSelectors.selectors array
        mapping(bytes4 => FacetAddressAndPosition) selectorToFacetAndPosition;
        // maps facet addresses to function selectors
        mapping(address => FacetFunctionSelectors) facetFunctionSelectors;
        // facet addresses
        address[] facetAddresses;
        // Used to query if a contract implements an interface.
        // Used to implement ERC-165.
        mapping(bytes4 => bool) supportedInterfaces;
        // owner of the contract
        address contractOwner;
    }

    function diamondStorage() internal pure returns (DiamondStorage storage ds) {
        bytes32 position = DIAMOND_STORAGE_POSITION;
        assembly {
            ds.slot := position
        }
    }

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

    function setContractOwner(address _newOwner) internal {
        DiamondStorage storage ds = diamondStorage();
        address previousOwner = ds.contractOwner;
        ds.contractOwner = _newOwner;
        emit OwnershipTransferred(previousOwner, _newOwner);
    }

    function contractOwner() internal view returns (address contractOwner_) {
        contractOwner_ = diamondStorage().contractOwner;
    }

    function enforceIsOwnerOrContract() internal view {
        require(msg.sender == diamondStorage().contractOwner ||
                msg.sender == address(this), "LibDiamond: Must be contract or owner"
        );
    }

    function enforceIsContractOwner() internal view {
        require(msg.sender == diamondStorage().contractOwner, "LibDiamond: Must be contract owner");
    }

    event DiamondCut(IDiamondCut.FacetCut[] _diamondCut, address _init, bytes _calldata);

    function addDiamondFunctions(
        address _diamondCutFacet,
        address _diamondLoupeFacet
    ) internal {
        IDiamondCut.FacetCut[] memory cut = new IDiamondCut.FacetCut[](2);
        bytes4[] memory functionSelectors = new bytes4[](1);
        functionSelectors[0] = IDiamondCut.diamondCut.selector;
        cut[0] = IDiamondCut.FacetCut({facetAddress: _diamondCutFacet, action: IDiamondCut.FacetCutAction.Add, functionSelectors: functionSelectors});
        functionSelectors = new bytes4[](5);
        functionSelectors[0] = IDiamondLoupe.facets.selector;
        functionSelectors[1] = IDiamondLoupe.facetFunctionSelectors.selector;
        functionSelectors[2] = IDiamondLoupe.facetAddresses.selector;
        functionSelectors[3] = IDiamondLoupe.facetAddress.selector;
        functionSelectors[4] = IERC165.supportsInterface.selector;
        cut[1] = IDiamondCut.FacetCut({
            facetAddress: _diamondLoupeFacet,
            action: IDiamondCut.FacetCutAction.Add,
            functionSelectors: functionSelectors
        });
        diamondCut(cut, address(0), "");
    }

    // Internal function version of diamondCut
    function diamondCut(
        IDiamondCut.FacetCut[] memory _diamondCut,
        address _init,
        bytes memory _calldata
    ) internal {
        for (uint256 facetIndex; facetIndex < _diamondCut.length; facetIndex++) {
            IDiamondCut.FacetCutAction action = _diamondCut[facetIndex].action;
            if (action == IDiamondCut.FacetCutAction.Add) {
                addFunctions(_diamondCut[facetIndex].facetAddress, _diamondCut[facetIndex].functionSelectors);
            } else if (action == IDiamondCut.FacetCutAction.Replace) {
                replaceFunctions(_diamondCut[facetIndex].facetAddress, _diamondCut[facetIndex].functionSelectors);
            } else if (action == IDiamondCut.FacetCutAction.Remove) {
                removeFunctions(_diamondCut[facetIndex].facetAddress, _diamondCut[facetIndex].functionSelectors);
            } else {
                revert("LibDiamondCut: Incorrect FacetCutAction");
            }
        }
        emit DiamondCut(_diamondCut, _init, _calldata);
        initializeDiamondCut(_init, _calldata);
    }

    function addFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal {
        require(_functionSelectors.length > 0, "LibDiamondCut: No selectors in facet to cut");
        DiamondStorage storage ds = diamondStorage();        
        require(_facetAddress != address(0), "LibDiamondCut: Add facet can't be address(0)");
        uint96 selectorPosition = uint96(ds.facetFunctionSelectors[_facetAddress].functionSelectors.length);
        // add new facet address if it does not exist
        if (selectorPosition == 0) {
            addFacet(ds, _facetAddress);            
        }
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; selectorIndex++) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = ds.selectorToFacetAndPosition[selector].facetAddress;
            require(oldFacetAddress == address(0), "LibDiamondCut: Can't add function that already exists");
            addFunction(ds, selector, selectorPosition, _facetAddress);
            selectorPosition++;
        }
    }

    function replaceFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal {
        require(_functionSelectors.length > 0, "LibDiamondCut: No selectors in facet to cut");
        DiamondStorage storage ds = diamondStorage();
        require(_facetAddress != address(0), "LibDiamondCut: Add facet can't be address(0)");
        uint96 selectorPosition = uint96(ds.facetFunctionSelectors[_facetAddress].functionSelectors.length);
        // add new facet address if it does not exist
        if (selectorPosition == 0) {
            addFacet(ds, _facetAddress);
        }
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; selectorIndex++) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = ds.selectorToFacetAndPosition[selector].facetAddress;
            require(oldFacetAddress != _facetAddress, "LibDiamondCut: Can't replace function with same function");
            removeFunction(ds, oldFacetAddress, selector);
            addFunction(ds, selector, selectorPosition, _facetAddress);
            selectorPosition++;
        }
    }

    function removeFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal {
        require(_functionSelectors.length > 0, "LibDiamondCut: No selectors in facet to cut");
        DiamondStorage storage ds = diamondStorage();
        // if function does not exist then do nothing and return
        require(_facetAddress == address(0), "LibDiamondCut: Remove facet address must be address(0)");
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; selectorIndex++) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = ds.selectorToFacetAndPosition[selector].facetAddress;
            removeFunction(ds, oldFacetAddress, selector);
        }
    }

    function addFacet(DiamondStorage storage ds, address _facetAddress) internal {
        enforceHasContractCode(_facetAddress, "LibDiamondCut: New facet has no code");
        ds.facetFunctionSelectors[_facetAddress].facetAddressPosition = ds.facetAddresses.length;
        ds.facetAddresses.push(_facetAddress);
    }    


    function addFunction(DiamondStorage storage ds, bytes4 _selector, uint96 _selectorPosition, address _facetAddress) internal {
        ds.selectorToFacetAndPosition[_selector].functionSelectorPosition = _selectorPosition;
        ds.facetFunctionSelectors[_facetAddress].functionSelectors.push(_selector);
        ds.selectorToFacetAndPosition[_selector].facetAddress = _facetAddress;
    }

    function removeFunction(DiamondStorage storage ds, address _facetAddress, bytes4 _selector) internal {        
        require(_facetAddress != address(0), "LibDiamondCut: Can't remove function that doesn't exist");
        // an immutable function is a function defined directly in a diamond
        require(_facetAddress != address(this), "LibDiamondCut: Can't remove immutable function");
        // replace selector with last selector, then delete last selector
        uint256 selectorPosition = ds.selectorToFacetAndPosition[_selector].functionSelectorPosition;
        uint256 lastSelectorPosition = ds.facetFunctionSelectors[_facetAddress].functionSelectors.length - 1;
        // if not the same then replace _selector with lastSelector
        if (selectorPosition != lastSelectorPosition) {
            bytes4 lastSelector = ds.facetFunctionSelectors[_facetAddress].functionSelectors[lastSelectorPosition];
            ds.facetFunctionSelectors[_facetAddress].functionSelectors[selectorPosition] = lastSelector;
            ds.selectorToFacetAndPosition[lastSelector].functionSelectorPosition = uint96(selectorPosition);
        }
        // delete the last selector
        ds.facetFunctionSelectors[_facetAddress].functionSelectors.pop();
        delete ds.selectorToFacetAndPosition[_selector];

        // if no more selectors for facet address then delete the facet address
        if (lastSelectorPosition == 0) {
            // replace facet address with last facet address and delete last facet address
            uint256 lastFacetAddressPosition = ds.facetAddresses.length - 1;
            uint256 facetAddressPosition = ds.facetFunctionSelectors[_facetAddress].facetAddressPosition;
            if (facetAddressPosition != lastFacetAddressPosition) {
                address lastFacetAddress = ds.facetAddresses[lastFacetAddressPosition];
                ds.facetAddresses[facetAddressPosition] = lastFacetAddress;
                ds.facetFunctionSelectors[lastFacetAddress].facetAddressPosition = facetAddressPosition;
            }
            ds.facetAddresses.pop();
            delete ds.facetFunctionSelectors[_facetAddress].facetAddressPosition;
        }
    }

    function initializeDiamondCut(address _init, bytes memory _calldata) internal {
        if (_init == address(0)) {
            require(_calldata.length == 0, "LibDiamondCut: _init is address(0) but_calldata is not empty");
        } else {
            require(_calldata.length > 0, "LibDiamondCut: _calldata is empty but _init is not address(0)");
            if (_init != address(this)) {
                enforceHasContractCode(_init, "LibDiamondCut: _init address has no code");
            }
            (bool success, bytes memory error) = _init.delegatecall(_calldata);
            if (!success) {
                if (error.length > 0) {
                    // bubble up the error
                    revert(string(error));
                } else {
                    revert("LibDiamondCut: _init function reverted");
                }
            }
        }
    }

    function enforceHasContractCode(address _contract, string memory _errorMessage) internal view {
        uint256 contractSize;
        assembly {
            contractSize := extcodesize(_contract)
        }
        require(contractSize > 0, _errorMessage);
    }
}

// SPDX-License-Identifier: MIT
pragma experimental ABIEncoderV2;
pragma solidity =0.7.6;
/******************************************************************************\
* Author: Nick Mudge <[email protected]> (https://twitter.com/mudgen)
/******************************************************************************/

interface IDiamondCut {
    enum FacetCutAction {Add, Replace, Remove}

    struct FacetCut {
        address facetAddress;
        FacetCutAction action;
        bytes4[] functionSelectors;
    }

    /// @notice Add/replace/remove any number of functions and optionally execute
    ///         a function with delegatecall
    /// @param _diamondCut Contains the facet addresses and function selectors
    /// @param _init The address of the contract or facet to execute _calldata
    /// @param _calldata A function call, including function selector and arguments
    ///                  _calldata is executed with delegatecall on _init
    function diamondCut(
        FacetCut[] calldata _diamondCut,
        address _init,
        bytes calldata _calldata
    ) external;

    event DiamondCut(FacetCut[] _diamondCut, address _init, bytes _calldata);
}

// SPDX-License-Identifier: MIT
pragma experimental ABIEncoderV2;
pragma solidity =0.7.6;
// A loupe is a small magnifying glass used to look at diamonds.
// These functions look at diamonds
interface IDiamondLoupe {
    /// These functions are expected to be called frequently
    /// by tools.

    struct Facet {
        address facetAddress;
        bytes4[] functionSelectors;
    }

    /// @notice Gets all facet addresses and their four byte function selectors.
    /// @return facets_ Facet
    function facets() external view returns (Facet[] memory facets_);

    /// @notice Gets all the function selectors supported by a specific facet.
    /// @param _facet The facet address.
    /// @return facetFunctionSelectors_
    function facetFunctionSelectors(address _facet) external view returns (bytes4[] memory facetFunctionSelectors_);

    /// @notice Get all the facet addresses used by a diamond.
    /// @return facetAddresses_
    function facetAddresses() external view returns (address[] memory facetAddresses_);

    /// @notice Gets the facet that supports the given selector.
    /// @dev If facet is not found return address(0).
    /// @param _functionSelector The function selector.
    /// @return facetAddress_ The facet address.
    function facetAddress(bytes4 _functionSelector) external view returns (address facetAddress_);
}

// SPDX-License-Identifier: MIT
pragma experimental ABIEncoderV2;
pragma solidity =0.7.6;
interface IERC165 {
    /// @notice Query if a contract implements an interface
    /// @param interfaceId The interface identifier, as specified in ERC-165
    /// @dev Interface identification is specified in ERC-165. This function
    ///  uses less than 30,000 gas.
    /// @return `true` if the contract implements `interfaceID` and
    ///  `interfaceID` is not 0xffffffff, `false` otherwise
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

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

//SPDX-License-Identifier: MIT
pragma solidity =0.7.6;
pragma experimental ABIEncoderV2;

/**
 * @title IPipeline
 * @author Publius
 * @notice Pipeline Interface – Pipeline creates a sandbox to execute any series of function calls on any series of protocols through Pipe functions. 
 * Any assets left in Pipeline between transactions can be transferred out by any account. 
 * Users Pipe a series of PipeCalls that each execute a function call to another protocol through Pipeline. 
 **/

// PipeCalls specify a function call to be executed by Pipeline. 
// Pipeline supports 2 types of PipeCalls: PipeCall and AdvancedPipeCall.

// PipeCall makes a function call with a static target address and callData.
struct PipeCall {
    address target;
    bytes data;
}

// AdvancedPipeCall makes a function call with a static target address and both static and dynamic callData.
// AdvancedPipeCalls support sending Ether in calls.
// [ PipeCall Type | Send Ether Flag | PipeCall Type data | Ether Value (only if flag == 1)]
// [ 1 byte        | 1 byte          | n bytes        | 0 or 32 bytes                      ]
// See LibFunction.useClipboard for more details.
struct AdvancedPipeCall {
    address target;
    bytes callData;
    bytes clipboard;
}

interface IPipeline {

    function pipe(PipeCall calldata p)
        external
        payable
        returns (bytes memory result);

    function multiPipe(PipeCall[] calldata pipes)
        external
        payable
        returns (bytes[] memory results);

    function advancedPipe(AdvancedPipeCall[] calldata pipes)
        external
        payable
        returns (bytes[] memory results);

}

/*
 SPDX-License-Identifier: MIT
*/

pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;

import "../LibAppStorage.sol";

/**
 * @author Publius
 * @title LibEth
 **/

library LibEth {
    function refundEth()
        internal
    {
        AppStorage storage s = LibAppStorage.diamondStorage();
        if (address(this).balance > 0 && s.isFarm != 2) {
            (bool success, ) = msg.sender.call{value: address(this).balance}(
                new bytes(0)
            );
            require(success, "Eth transfer Failed.");
        }
    }
}

/*
 SPDX-License-Identifier: MIT
*/

pragma solidity =0.7.6;
pragma experimental ABIEncoderV2;

import "../farm/AppStorage.sol";

/**
 * @author Publius
 * @title App Storage Library allows libaries to access Beanstalk's state.
**/
library LibAppStorage {

    function diamondStorage() internal pure returns (AppStorage storage ds) {
        assembly {
            ds.slot := 0
        }
    }

}

/*
 SPDX-License-Identifier: MIT
*/

pragma solidity =0.7.6;
pragma experimental ABIEncoderV2;

import "../interfaces/IDiamondCut.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

/**
 * @author Publius
 * @title App Storage defines the state object for Beanstalk.
**/

// The Account contract stores all of the Farmer specific storage data.
// Each unique Ethereum address is a Farmer.
// Account.State is the primary struct that is referenced in the greater Storage.State struct.
// All other structs in Account are stored in Account.State.
contract Account {

    // Field stores a Farmer's Plots and Pod allowances.
    struct Field {
        mapping(uint256 => uint256) plots; // A Farmer's Plots. Maps from Plot index to Pod amount.
        mapping(address => uint256) podAllowances; // An allowance mapping for Pods similar to that of the ERC-20 standard. Maps from spender address to allowance amount.
    }

    // Asset Silo is a struct that stores Deposits and Seeds per Deposit, and formerly stored Withdrawals.
    // Asset Silo currently stores Unripe Bean and Unripe LP Deposits.
    struct AssetSilo {
        mapping(uint32 => uint256) withdrawals; // DEPRECATED – Silo V1 Withdrawals are no longer referenced.
        mapping(uint32 => uint256) deposits; // Unripe Bean/LP Deposits (previously Bean/LP Deposits).
        mapping(uint32 => uint256) depositSeeds; // BDV of Unripe LP Deposits / 4 (previously # of Seeds in corresponding LP Deposit).
    }

    // Deposit represents a Deposit in the Silo of a given Token at a given Season.
    // Stored as two uint128 state variables to save gas.
    struct Deposit {
        uint128 amount; // The amount of Tokens in the Deposit.
        uint128 bdv; // The Bean-denominated-value of the total amount of Tokens in the Deposit.
    }

    // Silo stores Silo-related balances
    struct Silo {
        uint256 stalk; // Balance of the Farmer's normal Stalk.
        uint256 seeds; // Balance of the Farmer's normal Seeds.
    }

    // Season Of Plenty stores Season of Plenty (SOP) related balances
    struct SeasonOfPlenty {
        // uint256 base; // DEPRECATED – Post Replant SOPs are denominated in plenty Tokens instead of base.
        uint256 roots; // The number of Roots a Farmer had when it started Raining.
        // uint256 basePerRoot; // DEPRECATED – Post Replant SOPs are denominated in plenty Tokens instead of base.
        uint256 plentyPerRoot; // The global Plenty Per Root index at the last time a Farmer updated their Silo. 
        uint256 plenty; // The balance of a Farmer's plenty. Plenty can be claimed directly for 3Crv.
    }

    // The Account level State stores all of the Farmer's balances in the contract.
    // The global AppStorage state stores a mapping from account address to Account.State.
    struct State {
        Field field; // A Farmer's Field storage.
        AssetSilo bean; // A Farmer's Unripe Bean Deposits only as a result of Replant (previously held the V1 Silo Deposits/Withdrawals for Beans).
        AssetSilo lp;  // A Farmer's Unripe LP Deposits as a result of Replant of BEAN:ETH Uniswap v2 LP Tokens (previously held the V1 Silo Deposits/Withdrawals for BEAN:ETH Uniswap v2 LP Tokens).
        Silo s; // A Farmer's Silo storage.
        uint32 votedUntil; // DEPRECATED – Replant removed on-chain governance including the ability to vote on BIPs.
        uint32 lastUpdate; // The Season in which the Farmer last updated their Silo.
        uint32 lastSop; // The last Season that a SOP occured at the time the Farmer last updated their Silo.
        uint32 lastRain; // The last Season that it started Raining at the time the Farmer last updated their Silo.
        uint32 lastSIs; // DEPRECATED – In Silo V1.2, the Silo reward mechanism was updated to no longer need to store the number of the Supply Increases at the time the Farmer last updated their Silo.
        uint32 proposedUntil; // DEPRECATED – Replant removed on-chain governance including the ability to propose BIPs.
        SeasonOfPlenty deprecated; // DEPRECATED – Replant reset the Season of Plenty mechanism
        uint256 roots; // A Farmer's Root balance.
        uint256 wrappedBeans; // DEPRECATED – Replant generalized Internal Balances. Wrapped Beans are now stored at the AppStorage level.
        mapping(address => mapping(uint32 => Deposit)) deposits; // A Farmer's Silo Deposits stored as a map from Token address to Season of Deposit to Deposit.
        mapping(address => mapping(uint32 => uint256)) withdrawals; // A Farmer's Withdrawals from the Silo stored as a map from Token address to Season the Withdrawal becomes Claimable to Withdrawn amount of Tokens.
        SeasonOfPlenty sop; // A Farmer's Season Of Plenty storage.
        mapping(address => mapping(address => uint256)) depositAllowances; // Spender => Silo Token
        mapping(address => mapping(IERC20 => uint256)) tokenAllowances; // Token allowances
        uint256 depositPermitNonces; // A Farmer's current deposit permit nonce
        uint256 tokenPermitNonces; // A Farmer's current token permit nonce
    }
}

// Storage stores the Global Beanstalk State.
// Storage.State stores the highest level State
// All Facets define Storage.State as the first and only state variable in the contract.
contract Storage {

    // DEPRECATED – After Replant, Beanstalk stores Token addresses as constants to save gas.
    // Contracts stored the contract addresses of various important contracts to Beanstalk.
    struct Contracts {
        address bean; // DEPRECATED – See above note
        address pair; // DEPRECATED – See above note
        address pegPair; // DEPRECATED – See above note
        address weth; // DEPRECATED – See above note
    }

    // Field stores global Field balances.
    struct Field {
        uint256 soil; // The number of Soil currently available.
        uint256 pods; // The pod index; the total number of Pods ever minted.
        uint256 harvested; // The harvested index; the total number of Pods that have ever been Harvested.
        uint256 harvestable; // The harvestable index; the total number of Pods that have ever been Harvestable. Included previously Harvested Beans.
    }

    // DEPRECATED – Replant moved governance off-chain.
    // Bip stores Bip related data.
    struct Bip {
        address proposer; // DEPRECATED – See above note
        uint32 start; // DEPRECATED – See above note
        uint32 period; // DEPRECATED – See above note
        bool executed; // DEPRECATED – See above note
        int pauseOrUnpause; // DEPRECATED – See above note
        uint128 timestamp; // DEPRECATED – See above note
        uint256 roots; // DEPRECATED – See above note
        uint256 endTotalRoots; // DEPRECATED – See above note
    }

    // DEPRECATED – Replant moved governance off-chain.
    // DiamondCut stores DiamondCut related data for each Bip.
    struct DiamondCut {
        IDiamondCut.FacetCut[] diamondCut;
        address initAddress;
        bytes initData;
    }

    // DEPRECATED – Replant moved governance off-chain.
    // Governance stores global Governance balances.
    struct Governance {
        uint32[] activeBips; // DEPRECATED – See above note
        uint32 bipIndex; // DEPRECATED – See above note
        mapping(uint32 => DiamondCut) diamondCuts; // DEPRECATED – See above note
        mapping(uint32 => mapping(address => bool)) voted; // DEPRECATED – See above note
        mapping(uint32 => Bip) bips; // DEPRECATED – See above note
    }

    // AssetSilo stores global Token level Silo balances.
    // In Storage.State there is a mapping from Token address to AssetSilo.
    struct AssetSilo {
        uint256 deposited; // The total number of a given Token currently Deposited in the Silo.
        uint256 withdrawn; // The total number of a given Token currently Withdrawn From the Silo but not Claimed.
    }

    // Silo stores global level Silo balances.
    struct Silo {
        uint256 stalk; // The total amount of active Stalk (including Earned Stalk, excluding Grown Stalk).
        uint256 seeds; // The total amount of active Seeds (excluding Earned Seeds).
        uint256 roots; // Total amount of Roots.
    }

    // Oracle stores global level Oracle balances.
    // Currently the oracle refers to the time weighted average delta b calculated from the Bean:3Crv pool.
    struct Oracle {
        bool initialized; // True if the Oracle has been initialzed. It needs to be initialized on Deployment and re-initialized each Unpause.
        uint32 startSeason; // The Season the Oracle started minting. Used to ramp up delta b when oracle is first added.
        uint256[2] balances; // The cumulative reserve balances of the pool at the start of the Season (used for computing time weighted average delta b).
        uint256 timestamp; // The timestamp of the start of the current Season.
    }

    // Rain stores global level Rain balances. (Rain is when P > 1, Pod rate Excessively Low).
    // Note: The `raining` storage variable is stored in the Season section for a gas efficient read operation.
    struct Rain {
        uint256 depreciated; // Ocupies a storage slot in place of a deprecated State variable.
        uint256 pods; // The number of Pods when it last started Raining.
        uint256 roots; // The number of Roots when it last started Raining.
    }

    // Sesaon stores global level Season balances.
    struct Season {
        // The first storage slot in Season is filled with a variety of somewhat unrelated storage variables.
        // Given that they are all smaller numbers, they are stored together for gas efficient read/write operations. 
        // Apologies if this makes it confusing :(
        uint32 current; // The current Season in Beanstalk.
        uint32 lastSop; // The Season in which the most recent consecutive series of Seasons of Plenty started.
        uint8 withdrawSeasons; // The number of seasons required to Withdraw a Deposit.
        uint32 lastSopSeason; // The Season in which the most recent consecutive series of Seasons of Plenty ended.
        uint32 rainStart; // rainStart stores the most recent Season in which Rain started.
        bool raining; // True if it is Raining (P < 1, Pod Rate Excessively Low).
        bool fertilizing; // True if Beanstalk has Fertilizer left to be paid off.
        uint256 start; // The timestamp of the Beanstalk deployment rounded down to the nearest hour.
        uint256 period; // The length of each season in Beanstalk.
        uint256 timestamp; // The timestamp of the start of the current Season.
    }

    // Weather stores global level Weather balances.
    struct Weather {
        uint256 startSoil; // The number of Soil at the start of the current Season.
        uint256 lastDSoil; // Delta Soil; the number of Soil purchased last Season.
        uint96 lastSoilPercent; // DEPRECATED: Was removed with Extreme Weather V2
        uint32 lastSowTime; // The number of seconds it took for all but at most 1 Soil to sell out last Season.
        uint32 nextSowTime; // The number of seconds it took for all but at most 1 Soil to sell out this Season
        uint32 yield; // Weather; the interest rate for sowing Beans in Soil.
        bool didSowBelowMin; // DEPRECATED: Was removed with Extreme Weather V2
        bool didSowFaster; // DEPRECATED: Was removed with Extreme Weather V2
    }

    // Fundraiser stores Fundraiser data for a given Fundraiser.
    struct Fundraiser {
        address payee; // The address to be paid after the Fundraiser has been fully funded.
        address token; // The token address that used to raise funds for the Fundraiser.
        uint256 total; // The total number of Tokens that need to be raised to complete the Fundraiser.
        uint256 remaining; // The remaining number of Tokens that need to to complete the Fundraiser.
        uint256 start; // The timestamp at which the Fundraiser started (Fundraisers cannot be started and funded in the same block).
    }

    // SiloSettings stores the settings for each Token that has been Whitelisted into the Silo.
    // A Token is considered whitelisted in the Silo if there exists a non-zero SiloSettings selector.
    struct SiloSettings {
        // selector is an encoded function selector 
        // that pertains to an external view Beanstalk function 
        // with the following signature:
        // function tokenToBdv(uint256 amount) public view returns (uint256);
        // It is called by `LibTokenSilo` through the use of delegatecall
        // To calculate the BDV of a Deposit at the time of Deposit.
        bytes4 selector; // The encoded BDV function selector for the Token.
        uint32 seeds; // The Seeds Per BDV that the Silo mints in exchange for Depositing this Token.
        uint32 stalk; // The Stalk Per BDV that the Silo mints in exchange for Depositing this Token.
    }

    // UnripeSettings stores the settings for an Unripe Token in Beanstalk.
    // An Unripe token is a vesting Token that is redeemable for a a pro rata share
    // of the balanceOfUnderlying subject to a penalty based on the percent of
    // Unfertilized Beans paid back.
    // There were two Unripe Tokens added at Replant: 
    // Unripe Bean with its underlying Token as Bean; and
    // Unripe LP with its underlying Token as Bean:3Crv LP.
    // Unripe Tokens are distirbuted through the use of a merkleRoot.
    // The existence of a non-zero UnripeSettings implies that a Token is an Unripe Token.
    struct UnripeSettings {
        address underlyingToken; // The address of the Token underlying the Unripe Token.
        uint256 balanceOfUnderlying; // The number of Tokens underlying the Unripe Tokens (redemption pool).
        bytes32 merkleRoot; // The Merkle Root used to validate a claim of Unripe Tokens.
    }
}

struct AppStorage {
    uint8 index; // DEPRECATED - Was the index of the Bean token in the Bean:Eth Uniswap v2 pool, which has been depreciated.
    int8[32] cases; // The 24 Weather cases (array has 32 items, but caseId = 3 (mod 4) are not cases).
    bool paused; // True if Beanstalk is Paused.
    uint128 pausedAt; // The timestamp at which Beanstalk was last paused. 
    Storage.Season season; // The Season storage struct found above.
    Storage.Contracts c; // DEPRECATED - Previously stored the Contracts State struct. Removed when contract addresses were moved to constants in C.sol.
    Storage.Field f; // The Field storage struct found above.
    Storage.Governance g; // The Governance storage struct found above.
    Storage.Oracle co; // The Oracle storage struct found above.
    Storage.Rain r; // The Rain storage struct found above.
    Storage.Silo s; // The Silo storage struct found above.
    uint256 reentrantStatus; // An intra-transaction state variable to protect against reentrance.
    Storage.Weather w; // The Weather storage struct found above.

    //////////////////////////////////

    uint256 earnedBeans; // The number of Beans distributed to the Silo that have not yet been Deposited as a result of the Earn function being called.
    uint256[14] depreciated; // DEPRECATED - 14 slots that used to store state variables which have been deprecated through various updates. Storage slots can be left alone or reused.
    mapping (address => Account.State) a; // A mapping from Farmer address to Account state.
    uint32 bip0Start; // DEPRECATED - bip0Start was used to aid in a migration that occured alongside BIP-0.
    uint32 hotFix3Start; // DEPRECATED - hotFix3Start was used to aid in a migration that occured alongside HOTFIX-3.
    mapping (uint32 => Storage.Fundraiser) fundraisers; // A mapping from Fundraiser Id to Fundraiser storage.
    uint32 fundraiserIndex; // The number of Fundraisers that have occured.
    mapping (address => bool) isBudget; // DEPRECATED - Budget Facet was removed in BIP-14. 
    mapping(uint256 => bytes32) podListings; // A mapping from Plot Index to the hash of the Pod Listing.
    mapping(bytes32 => uint256) podOrders; // A mapping from the hash of a Pod Order to the amount of Pods that the Pod Order is still willing to buy.
    mapping(address => Storage.AssetSilo) siloBalances; // A mapping from Token address to Silo Balance storage (amount deposited and withdrawn).
    mapping(address => Storage.SiloSettings) ss; // A mapping from Token address to Silo Settings for each Whitelisted Token. If a non-zero storage exists, a Token is whitelisted.
    uint256[3] depreciated2; // DEPRECATED - 3 slots that used to store state variables which have been depreciated through various updates. Storage slots can be left alone or reused.

    // New Sops
    mapping (uint32 => uint256) sops; // A mapping from Season to Plenty Per Root (PPR) in that Season. Plenty Per Root is 0 if a Season of Plenty did not occur.

    // Internal Balances
    mapping(address => mapping(IERC20 => uint256)) internalTokenBalance; // A mapping from Farmer address to Token address to Internal Balance. It stores the amount of the Token that the Farmer has stored as an Internal Balance in Beanstalk.

    // Unripe
    mapping(address => mapping(address => bool)) unripeClaimed; // True if a Farmer has Claimed an Unripe Token. A mapping from Farmer to Unripe Token to its Claim status.
    mapping(address => Storage.UnripeSettings) u; // Unripe Settings for a given Token address. The existence of a non-zero Unripe Settings implies that the token is an Unripe Token. The mapping is from Token address to Unripe Settings.

    // Fertilizer
    mapping(uint128 => uint256) fertilizer; // A mapping from Fertilizer Id to the supply of Fertilizer for each Id.
    mapping(uint128 => uint128) nextFid; // A linked list of Fertilizer Ids ordered by Id number. Fertilizer Id is the Beans Per Fertilzer level at which the Fertilizer no longer receives Beans. Sort in order by which Fertilizer Id expires next.
    uint256 activeFertilizer; // The number of active Fertilizer.
    uint256 fertilizedIndex; // The total number of Fertilizer Beans.
    uint256 unfertilizedIndex; // The total number of Unfertilized Beans ever.
    uint128 fFirst; // The lowest active Fertilizer Id (start of linked list that is stored by nextFid). 
    uint128 fLast; // The highest active Fertilizer Id (end of linked list that is stored by nextFid). 
    uint128 bpf; // The cumulative Beans Per Fertilizer (bfp) minted over all Season.
    uint256 recapitalized; // The nubmer of USDC that has been recapitalized in the Barn Raise.
    uint256 isFarm; // Stores whether the function is wrapped in the `farm` function (1 if not, 2 if it is).
    address ownerCandidate; // Stores a candidate address to transfer ownership to. The owner must claim the ownership transfer.
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../math/SafeMath.sol";

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 * Since it is not possible to overflow a 256 bit integer with increments of one, `increment` can skip the {SafeMath}
 * overflow check, thereby saving gas. This does assume however correct usage, in that the underlying `_value` is never
 * directly accessed.
 */
library Counters {
    using SafeMath for uint256;

    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        // The {SafeMath} overflow check can be skipped here, see the comment at the top
        counter._value += 1;
    }

    function decrement(Counter storage counter) internal {
        counter._value = counter._value.sub(1);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.2 <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;
        // solhint-disable-next-line no-inline-assembly
        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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"},{"internalType":"bytes","name":"clipboard","type":"bytes"}],"internalType":"struct AdvancedPipeCall[]","name":"pipes","type":"tuple[]"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"advancedPipe","outputs":[{"internalType":"bytes[]","name":"results","type":"bytes[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"contract IERC1155","name":"token","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256[]","name":"ids","type":"uint256[]"},{"internalType":"uint256[]","name":"values","type":"uint256[]"}],"name":"batchTransferERC1155","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct PipeCall","name":"p","type":"tuple"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"etherPipe","outputs":[{"internalType":"bytes","name":"result","type":"bytes"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"farm","outputs":[{"internalType":"bytes[]","name":"results","type":"bytes[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct PipeCall[]","name":"pipes","type":"tuple[]"}],"name":"multiPipe","outputs":[{"internalType":"bytes[]","name":"results","type":"bytes[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permitDeposit","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"uint256[]","name":"values","type":"uint256[]"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permitDeposits","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"contract IERC20Permit","name":"token","type":"address"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permitERC20","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"contract IERC4494","name":"token","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bytes","name":"sig","type":"bytes"}],"name":"permitERC721","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permitToken","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct PipeCall","name":"p","type":"tuple"}],"name":"pipe","outputs":[{"internalType":"bytes","name":"result","type":"bytes"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct PipeCall","name":"p","type":"tuple"}],"name":"readPipe","outputs":[{"internalType":"bytes","name":"result","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint32","name":"season","type":"uint32"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferDeposit","outputs":[{"internalType":"uint256","name":"bdv","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint32[]","name":"seasons","type":"uint32[]"},{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"name":"transferDeposits","outputs":[{"internalType":"uint256[]","name":"bdvs","type":"uint256[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"contract IERC1155","name":"token","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transferERC1155","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"contract IERC721","name":"token","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"}],"name":"transferERC721","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"enum From","name":"fromMode","type":"uint8"},{"internalType":"enum To","name":"toMode","type":"uint8"}],"name":"transferToken","outputs":[],"stateMutability":"payable","type":"function"}]

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