// File: contracts/minter/EclipseMinterDutchAuction.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;
import {Eclipse} from "../app/Eclipse.sol";
import {IEclipseERC721} from "../interface/IEclipseERC721.sol";
import {IEclipseMintGate} from "../interface/IEclipseMintGate.sol";
import {IEclipsePaymentSplitter} from "../interface/IEclipsePaymentSplitter.sol";
import {EclipseMinterBase, GateParams} from "./EclipseMinterBase.sol";

/**
 * @dev Eclipse Dutch Auction Minter
 * Admin for collections deployed on {Eclipse}
 */

contract EclipseMinterDutchAuction is EclipseMinterBase {
    struct DutchAuctionPricing {
        uint256 startPrice;
        uint24 decrease;
        uint24 delay;
        uint8 decrements;
        uint8 auctionType;
    }
    struct DutchAuctionParams {
        address artist;
        uint48 startTime;
        uint48 endTime;
        uint24 maxSupply;
        DutchAuctionPricing pricing;
        GateParams gate;
    }

    mapping(address => DutchAuctionPricing[]) public pricings;

    uint256 public constant PRECISION_FACTOR = 10 ** 6;

    event PricingSet(
        address collection,
        CollectionMintParams mint,
        DutchAuctionPricing pricing,
        uint8 index
    );

    constructor(address eclipse_) EclipseMinterBase(eclipse_) {}

    /**
     * @dev Set pricing for collection
     * @param collection contract address of the collection
     * @param data `FixedPriceParams` struct
     */
    function setPricing(
        address collection,
        address sender,
        bytes memory data
    ) external override onlyAdmin {
        DutchAuctionParams memory params = abi.decode(
            data,
            (DutchAuctionParams)
        );
        CollectionMintParams[] storage col = collections[collection];
        DutchAuctionPricing memory pricing = params.pricing;
        address artist = params.artist;
        uint48 startTime = params.startTime;
        uint48 endTime = params.endTime;
        uint24 maxSupply = params.maxSupply;
        uint8 index = uint8(col.length);
        uint8 gateType = params.gate.gateType;
        address gateAddress = Eclipse(eclipse).gateTypes(gateType);

        checkParams(
            collection,
            artist,
            sender,
            startTime,
            endTime,
            maxSupply,
            pricing
        );

        IEclipseMintGate(gateAddress).addGateForCollection(
            collection,
            address(this),
            index,
            params.gate.gateCalldata
        );
        CollectionMintParams memory mintParams = CollectionMintParams(
            artist,
            startTime,
            endTime,
            maxSupply,
            gateAddress,
            gateType
        );
        col.push(mintParams);
        emit PricingSet(collection, mintParams, pricing, index);
    }

    function checkParams(
        address collection,
        address artist,
        address sender,
        uint256 startTime,
        uint256 endTime,
        uint256 maxSupply,
        DutchAuctionPricing memory pricing
    ) internal {
        require(sender == artist, "invalid collection");
        require(startTime > block.timestamp, "startTime too early");
        if (endTime != 0) {
            require(endTime > startTime, "endTime must be greater startTime");
        }
        require(maxSupply > 0, "maxSupply must be greater 0");
        require(pricing.startPrice > 0, "startPrice must be greater 0");
        require(
            pricing.decrease <= 1_000_000,
            "decrease must be less or equal than 1_000_000"
        );
        require(
            pricing.decrements <= 6 && pricing.decrements > 0,
            "decrements must be between 1 and 6"
        );
        require(pricing.delay > 0, "delay must be greather 0");
        require(pricing.auctionType <= 1, "invalid auctionType");
        pricings[collection].push(pricing);
    }

    /**
     * @dev Mint a token
     * @param collection contract address of the collection
     */
    function mintOne(
        address collection,
        uint8 index
    ) external payable override {
        _checkState(collection, index);
        address user = _msgSender();
        address minter = address(this);
        address gate = collections[collection][index].gateAddress;
        _getAllowedMintsAndUpdate(collection, index, minter, gate, user, 1);
        IEclipseERC721(collection).mintOne(user);
        _splitPayment(collection, index, user, 1, msg.value);
    }

    /**
     * @dev Mint a token
     * @param collection contract address of the collection
     * @param amount amount of tokens to mint
     */
    function mint(
        address collection,
        uint8 index,
        uint24 amount
    ) external payable override {
        _checkState(collection, index);
        address user = _msgSender();
        address minter = address(this);
        address gate = collections[collection][index].gateAddress;
        uint24 allowedMints = _getAllowedMintsAndUpdate(
            collection,
            index,
            minter,
            gate,
            user,
            amount
        );
        IEclipseERC721(collection).mint(user, allowedMints);

        _splitPayment(
            collection,
            index,
            user,
            amount,
            (msg.value / amount) * allowedMints
        );
    }

    /**
     * @dev Internal function to forward funds to a {EclipsePaymentSplitter}
     */
    function _splitPayment(
        address collection,
        uint8 index,
        address sender,
        uint24 amount,
        uint256 value
    ) internal {
        uint256 msgValue = msg.value;
        require(
            msgValue == getPrice(collection, index) * amount,
            "wrong amount sent"
        );
        address paymentSplitter = Eclipse(eclipse)
            .store()
            .getPaymentSplitterForCollection(collection);
        IEclipsePaymentSplitter(paymentSplitter).splitPayment{value: value}();
        if (value != msgValue) {
            payable(sender).transfer(msgValue - value);
        }
    }

    /**
     * @dev Get collection pricing object
     * @param collection contract address of the collection
     */
    function getCollectionPricing(
        address collection
    ) external view returns (DutchAuctionPricing[] memory) {
        return pricings[collection];
    }

    /**
     * @dev Get price for collection
     * @param collection contract address of the collection
     */
    function getPrice(
        address collection,
        uint8 index
    ) public view override returns (uint256) {
        DutchAuctionPricing memory pricing = pricings[collection][index];
        CollectionMintParams memory mintParams = collections[collection][index];
        uint48 startTime = mintParams.startTime;
        uint256 startPrice = pricing.startPrice;
        uint48 timestamp = uint48(block.timestamp);
        if (startTime >= timestamp) return startPrice;
        uint8 decrements = pricing.decrements;
        uint256 decrease = pricing.decrease;
        uint256 delay = pricing.delay;
        uint256 duration = timestamp - startTime + 1;
        uint256 steps = (duration / delay) + (duration % delay > 0 ? 1 : 0) - 1;
        steps = steps > decrements ? decrements : steps;

        return
            pricing.auctionType == 0
                ? (startPrice * (PRECISION_FACTOR - (decrease * steps))) /
                    PRECISION_FACTOR
                : (startPrice * ((PRECISION_FACTOR - decrease) ** steps)) /
                    (PRECISION_FACTOR ** steps);
    }
}

// File: contracts/interface/IEclipseERC721.sol



// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;
import {IERC2981Upgradeable} from "@openzeppelin/contracts-upgradeable/interfaces/IERC2981Upgradeable.sol";
import {IERC721EnumerableUpgradeable} from "@openzeppelin/contracts-upgradeable/interfaces/IERC721EnumerableUpgradeable.sol";
import {IERC721MetadataUpgradeable} from "@openzeppelin/contracts-upgradeable/interfaces/IERC721MetadataUpgradeable.sol";

interface IEclipseERC721 is
    IERC721MetadataUpgradeable,
    IERC2981Upgradeable,
    IERC721EnumerableUpgradeable
{
    function initialize(
        string memory name,
        string memory symbol,
        string memory uri,
        uint256 id,
        uint24 maxSupply,
        address admin,
        address contractAdmin,
        address artist,
        address[] memory minters,
        address paymentSplitter
    ) external;

    function getTokensByOwner(
        address _owner
    ) external view returns (uint256[] memory);

    function getInfo()
        external
        view
        returns (
            string memory name,
            string memory symbol,
            address artist,
            uint256 id,
            uint24 maxSupply,
            uint256 totalSupply
        );

    function mint(address to, uint24 amount) external;

    function mintOne(address to) external;

    function setMinter(address minter, bool enable) external;
}

// File: contracts/app/Eclipse.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;
import {EclipseAccess} from "../access/EclipseAccess.sol";
import {EclipseCollectionFactory, CollectionParams} from "../factory/EclipseCollectionFactory.sol";
import {EclipsePaymentSplitterFactory} from "../factory/EclipsePaymentSplitterFactory.sol";
import {IEclipseERC721} from "../interface/IEclipseERC721.sol";
import {IEclipseMinter} from "../interface/IEclipseMinter.sol";
import {EclipseStorage, Collection, Artist} from "../storage/EclipseStorage.sol";

/**
 * @dev Eclipse
 * Admin of {EclipseCollectionFactory} and {EclipsePaymentSplitterFactory}
 */

struct CreateCollectionParams {
    string name;
    string symbol;
    string script;
    uint8 collectionType;
    uint24 maxSupply;
    uint8 erc721Index;
    uint8[] pricingMode;
    bytes[] pricingData;
    address[] payeesMint;
    address[] payeesRoyalties;
    uint24[] sharesMint;
    uint24[] sharesRoyalties;
}
struct PricingParams {
    uint8 mode;
    bytes data;
}

struct CollectionInfo {
    string name;
    string symbol;
    Collection collection;
    Artist artist;
}

contract Eclipse is EclipseAccess {
    address public collectionFactory;
    address public paymentSplitterFactory;
    address public platformPayoutAddress;
    mapping(uint8 => address) public minters;
    mapping(uint8 => address) public gateTypes;

    EclipseStorage public store;

    constructor(
        address collectionFactory_,
        address paymentSplitterFactory_,
        address store_,
        address platformPayoutAddress_
    ) {
        collectionFactory = collectionFactory_;
        paymentSplitterFactory = paymentSplitterFactory_;
        platformPayoutAddress = platformPayoutAddress_;
        store = EclipseStorage(store_);
    }

    /**
     * @dev Throws if called by any account other than the artist
     */
    modifier onlyArtist(address collection) {
        address artist = store.getCollection(collection).artist;
        require(
            _msgSender() == artist,
            "EclipseAccess: caller is not the artist"
        );
        _;
    }

    /**
     * @dev Internal functtion to close the ERC721 implementation contract
     */
    function _cloneCollection(
        CollectionParams memory params
    ) internal returns (address instance, uint256 id) {
        return
            EclipseCollectionFactory(collectionFactory).cloneCollectionContract(
                params
            );
    }

    /**
     * @dev Internal functtion to create the collection and risgister to minter
     */
    function _createCollection(
        CollectionParams memory params
    ) internal returns (address instance, uint256 id) {
        (instance, id) = _cloneCollection(params);
        store.setCollection(
            Collection(
                id,
                params.artist,
                instance,
                params.maxSupply,
                params.script,
                params.paymentSplitter
            )
        );
    }

    /**
     * @dev Clones an ERC721 implementation contract
     * @param params params
     * @dev name name of collection
     * @dev symbol ERC721 symbol for collection
     * @dev script single html as string
     * @dev maxSupply max token supply
     * @dev erc721Index ERC721 implementation index
     * @dev pricingMode minter index
     * @dev pricingData calldata for `setPricing` function
     * @dev payeesMint address list of payees of mint proceeds
     * @dev payeesRoyalties address list of payees of royalties
     * @dev sharesMint list of shares for mint proceeds
     * @dev sharesRoyalties list of shares for royalties
     * Note payee and shares indices must be in respective order
     */
    function createCollection(CreateCollectionParams calldata params) external {
        uint24 maxSupply = params.maxSupply;
        require(maxSupply <= 1_000_000, "maxSupply too big");
        address artist = _msgSender();
        _createArtist(artist);
        address paymentSplitter = EclipsePaymentSplitterFactory(
            paymentSplitterFactory
        ).clone(
                owner(),
                platformPayoutAddress,
                artist,
                params.payeesMint,
                params.payeesRoyalties,
                params.sharesMint,
                params.sharesRoyalties
            );
        address instance = EclipseCollectionFactory(collectionFactory)
            .predictDeterministicAddress(params.erc721Index);
        bytes[] memory pricingData = params.pricingData;
        uint8[] memory pricingMode = params.pricingMode;
        address[] memory collectionMinters = new address[](pricingMode.length);
        for (uint8 i; i < pricingMode.length; i++) {
            address minter = minters[pricingMode[i]];
            collectionMinters[i] = minter;
            _addMinterToCollection(instance, artist, minter, pricingData[i]);
        }
        _createCollection(
            CollectionParams(
                artist,
                params.name,
                params.symbol,
                params.script,
                params.collectionType,
                maxSupply,
                address(this),
                params.erc721Index,
                collectionMinters,
                paymentSplitter
            )
        );
    }

    /**
     * @dev Internal helper method to create artist
     * @param artist address of artist
     */
    function _createArtist(address artist) internal {
        if (store.getArtist(artist).wallet != address(0)) return;
        address[] memory collections_;
        store.setArtist(Artist(artist, collections_));
    }

    /**
     * @dev Internal helper method to add minter to collection
     */
    function _addMinterToCollection(
        address collection,
        address sender,
        address minter,
        bytes memory pricingData
    ) internal {
        IEclipseMinter(minter).setPricing(collection, sender, pricingData);
    }

    /**
     * @dev Set the {EclipseCollectionFactory} contract address
     */
    function setCollectionFactory(address factory) external onlyAdmin {
        collectionFactory = factory;
    }

    /**
     * @dev Set the {EclipsePaymentSplitterFactory} contract address
     */
    function setPaymentSplitterFactory(address factory) external onlyAdmin {
        paymentSplitterFactory = factory;
    }

    /**
     * @dev Set the {EclipsePaymentSplitterFactory} contract address
     */
    function enableMinterForCollection(
        address collection,
        uint8 pricingMode,
        bytes memory pricingData,
        bool enable
    ) external onlyArtist(collection) {
        address minter = minters[pricingMode];
        if (enable) {
            _addMinterToCollection(
                collection,
                _msgSender(),
                minter,
                pricingData
            );
        }
        IEclipseERC721(collection).setMinter(minter, enable);
    }

    /**
     * @dev Add a minter contract and map by index
     */
    function addMinter(uint8 index, address minter) external onlyAdmin {
        minters[index] = minter;
    }

    /**
     * @dev Add a gatre contract and map by index
     */
    function addGate(uint8 index, address gate) external onlyAdmin {
        gateTypes[index] = gate;
    }

    /**
     * @dev Get collection info
     * @param collection contract address of the collection
     */
    function getCollectionInfo(
        address collection
    ) external view returns (CollectionInfo memory info) {
        (
            string memory name,
            string memory symbol,
            address artist,
            ,
            ,

        ) = IEclipseERC721(collection).getInfo();
        Artist memory artist_ = store.getArtist(artist);

        info = CollectionInfo(
            name,
            symbol,
            store.getCollection(collection),
            artist_
        );
    }
}

// File: contracts/interface/IEclipseMintGate.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

struct UserMint {
    uint24 allowed;
    uint24 minted;
}

interface IEclipseMintGate {
    function getAllowedMints(
        address collection,
        address minterContract,
        uint8 index,
        address user
    ) external view returns (uint24);

    function update(
        address collection,
        address minterContract,
        uint8 index,
        address user,
        uint24 amount
    ) external;

    function isUserAllowed(
        address collection,
        address minterContract,
        uint8 index,
        address user
    ) external view returns (bool);

    function addGateForCollection(
        address collection,
        address minterContract,
        uint8 index,
        bytes memory data
    ) external;

    function getTotalMinted(
        address collection,
        address minterContract,
        uint8 index
    ) external view returns (uint24);

    function getUserMint(
        address collection,
        address minterContract,
        uint8 index,
        address user
    ) external view returns (UserMint memory);
}

// File: contracts/interface/IEclipsePaymentSplitter.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

interface IEclipsePaymentSplitter {
    function splitPayment() external payable;

    function getTotalShares() external view returns (uint256);

    function getTotalRoyaltyShares() external view returns (uint256);

    function release(address account) external;

    function updatePayee(
        uint8 paymentType,
        uint8 payeeIndex,
        address newPayee
    ) external;
}

// File: contracts/minter/EclipseMinterBase.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;
import {EclipseAccess} from "../access/EclipseAccess.sol";
import {Eclipse} from "../app/Eclipse.sol";
import {IEclipseMinter} from "../interface/IEclipseMinter.sol";
import {IEclipseMintGate, UserMint} from "../interface/IEclipseMintGate.sol";

/**
 * @dev Eclipse base minter
 */

struct GateParams {
    uint8 gateType;
    bytes gateCalldata;
}

abstract contract EclipseMinterBase is EclipseAccess, IEclipseMinter {
    struct CollectionMintParams {
        address artist;
        uint48 startTime;
        uint48 endTime;
        uint24 maxSupply;
        address gateAddress;
        uint8 gateType;
    }

    struct CollectionState {
        CollectionMintParams params;
        uint24 available;
        uint24 minted;
    }
    Eclipse public eclipse;

    mapping(address => CollectionMintParams[]) public collections;

    constructor(address eclipse_) EclipseAccess() {
        eclipse = Eclipse(eclipse_);
    }

    /**
     * @dev Set the {Eclipse} contract address
     */
    function setEclipse(address eclipse_) external onlyAdmin {
        eclipse = Eclipse(eclipse_);
    }

    function _getAvailableSupply(
        address collection,
        uint8 index
    ) internal view returns (uint24 available, uint24 minted) {
        address gateAddress = collections[collection][index].gateAddress;
        IEclipseMintGate gate = IEclipseMintGate(gateAddress);
        uint24 totalMinted = gate.getTotalMinted(
            collection,
            address(this),
            index
        );

        return (
            collections[collection][index].maxSupply - totalMinted,
            totalMinted
        );
    }

    function getAllowedMintsForUser(
        address collection,
        uint8 index,
        address user
    ) external view override returns (UserMint memory) {
        address gateAddress = collections[collection][index].gateAddress;
        IEclipseMintGate gate = IEclipseMintGate(gateAddress);
        return gate.getUserMint(collection, address(this), index, user);
    }

    function getAvailableSupply(
        address collection,
        uint8 index
    ) external view override returns (uint24 available, uint24 minted) {
        return _getAvailableSupply(collection, index);
    }

    function getCollectionState(
        address collection
    ) external view returns (CollectionState[] memory) {
        CollectionMintParams[] memory params = collections[collection];
        CollectionState[] memory returnArr = new CollectionState[](
            params.length
        );
        for (uint8 i; i < params.length; i++) {
            (uint24 available, uint24 minted) = _getAvailableSupply(
                collection,
                i
            );
            returnArr[i] = CollectionState(params[i], available, minted);
        }

        return returnArr;
    }

    /**
     * @dev Helper function to check for mint price and start date
     */
    function _checkState(
        address collection,
        uint8 index
    ) internal view virtual {
        uint256 timestamp = block.timestamp;
        uint256 startTime = collections[collection][index].startTime;
        uint256 endTime = collections[collection][index].endTime;
        require(
            startTime != 0 && startTime <= timestamp,
            "mint not started yet"
        );
        if (endTime != 0) {
            require(timestamp <= endTime, "mint ended");
        }
    }

    /**
     * @dev Helper function to check for available mints for sender
     */
    function _getAllowedMints(
        address collection,
        uint8 index,
        address minter,
        address gateAddress,
        address sender,
        uint24 amount
    ) internal view returns (uint24) {
        IEclipseMintGate gate = IEclipseMintGate(gateAddress);
        uint24 allowedMints = gate.getAllowedMints(
            collection,
            minter,
            index,
            sender
        );
        require(allowedMints > 0, "no mints available");
        uint24 minted = gate.getTotalMinted(collection, minter, index);
        uint24 availableSupply = collections[collection][index].maxSupply -
            minted;
        require(availableSupply > 0, "sold out");
        uint24 mints = amount > allowedMints ? allowedMints : amount;

        return mints > availableSupply ? availableSupply : mints;
    }

    /**
     * @dev Helper function to check for available mints for sender
     */
    function _getAllowedMintsAndUpdate(
        address collection,
        uint8 index,
        address minter,
        address gateAddress,
        address sender,
        uint24 amount
    ) internal returns (uint24) {
        IEclipseMintGate gate = IEclipseMintGate(gateAddress);
        uint24 minted = _getAllowedMints(
            collection,
            index,
            minter,
            gateAddress,
            sender,
            amount
        );
        gate.update(collection, minter, index, sender, minted);
        return minted;
    }
}

// File: @openzeppelin/contracts-upgradeable/interfaces/IERC2981Upgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (interfaces/IERC2981.sol)

pragma solidity ^0.8.0;

import "../utils/introspection/IERC165Upgradeable.sol";

/**
 * @dev Interface for the NFT Royalty Standard.
 *
 * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
 * support for royalty payments across all NFT marketplaces and ecosystem participants.
 *
 * _Available since v4.5._
 */
interface IERC2981Upgradeable is IERC165Upgradeable {
    /**
     * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
     * exchange. The royalty amount is denominated and should be paid in that same unit of exchange.
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        returns (address receiver, uint256 royaltyAmount);
}

// File: @openzeppelin/contracts-upgradeable/interfaces/IERC721EnumerableUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../token/ERC721/extensions/IERC721EnumerableUpgradeable.sol";

// File: @openzeppelin/contracts-upgradeable/interfaces/IERC721MetadataUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../token/ERC721/extensions/IERC721MetadataUpgradeable.sol";

// File: @openzeppelin/contracts-upgradeable/utils/introspection/IERC165Upgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165Upgradeable {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// File: @openzeppelin/contracts-upgradeable/token/ERC721/extensions/IERC721EnumerableUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../IERC721Upgradeable.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721EnumerableUpgradeable is IERC721Upgradeable {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

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

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

// File: @openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0-rc.1) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165Upgradeable.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721Upgradeable is IERC165Upgradeable {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

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

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

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

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

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

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

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

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

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

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

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

// File: @openzeppelin/contracts-upgradeable/token/ERC721/extensions/IERC721MetadataUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721Upgradeable.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721MetadataUpgradeable is IERC721Upgradeable {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

// File: contracts/interface/IEclipseMinter.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import {UserMint} from "./IEclipseMintGate.sol";

interface IEclipseMinter {
    function mintOne(address collection, uint8 index) external payable;

    function mint(
        address collection,
        uint8 index,
        uint24 amount
    ) external payable;

    function getPrice(
        address collection,
        uint8 index
    ) external view returns (uint256);

    function getAllowedMintsForUser(
        address collection,
        uint8 index,
        address user
    ) external view returns (UserMint memory);

    function setPricing(
        address collection,
        address sender,
        bytes memory data
    ) external;

    function getAvailableSupply(
        address collection,
        uint8 index
    ) external view returns (uint24 available, uint24 minted);
}

// File: contracts/access/EclipseAccess.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";

/**
 * @dev This implements access control for owner and admins
 */
abstract contract EclipseAccess is Ownable {
    mapping(address => bool) public admins;
    address public eclipseAdmin;

    constructor() Ownable() {
        eclipseAdmin = _msgSender();
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyAdmin() {
        address sender = _msgSender();
        require(
            owner() == sender || admins[sender],
            "EclipseAccess: caller is not the owner nor admin"
        );
        _;
    }

    /**
     * @dev Throws if called by any account other than the Eclipse admin.
     */
    modifier onlyEclipseAdmin() {
        address sender = _msgSender();
        require(
            eclipseAdmin == sender,
            "EclipseAccess: caller is not eclipse admin"
        );
        _;
    }

    function setEclipseAdmin(address admin) public onlyEclipseAdmin {
        eclipseAdmin = admin;
    }

    function setAdminAccess(
        address admin,
        bool access
    ) public onlyEclipseAdmin {
        admins[admin] = access;
    }
}

// File: contracts/factory/EclipseCollectionFactory.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import {Clones} from "@openzeppelin/contracts/proxy/Clones.sol";
import {Address} from "@openzeppelin/contracts/utils/Address.sol";
import {EclipseAccess} from "../access/EclipseAccess.sol";
import {IEclipseMinter} from "../interface/IEclipseMinter.sol";

/**
 * Eclipse ERC721 contract factory
 */

struct CollectionParams {
    address artist;
    string name;
    string symbol;
    string script;
    uint8 collectionType;
    uint24 maxSupply;
    address contractAdmin;
    uint8 erc721Index;
    address[] minters;
    address paymentSplitter;
}
struct CollectionEvent {
    uint256 id;
    address contractAddress;
    uint8 collectionType;
    address artist;
    string name;
    string symbol;
    string script;
    uint24 maxSupply;
    address implementation;
    address paymentSplitter;
}
struct CollectionType {
    string name;
    uint256 prefix;
    uint256 lastId;
}

struct InitializerParams {
    uint256 id;
    address artist;
    string name;
    string symbol;
    uint24 maxSupply;
    address contractAdmin;
    address[] minters;
    address paymentSplitter;
}

contract EclipseCollectionFactory is EclipseAccess {
    mapping(uint8 => address) public erc721Implementations;
    mapping(uint8 => CollectionType) public collectionTypes;

    address public paymentSplitterImplementation;
    string public uri;

    event Created(CollectionEvent collection);

    constructor(string memory uri_) EclipseAccess() {
        uri = uri_;
        uint256 chain;
        assembly {
            chain := chainid()
        }
        collectionTypes[0] = CollectionType(
            "js",
            chain * 1_000_000_000 + 100_000_000,
            0
        );
    }

    /**
     * @dev Get next collection id
     */
    function _getNextCollectionId(
        uint8 collectionType
    ) internal returns (uint256) {
        CollectionType storage obj = collectionTypes[collectionType];
        require(obj.prefix != 0, "invalid collectionType");
        obj.lastId += 1;
        uint256 id = obj.prefix + obj.lastId;
        return id;
    }

    /**
     * @dev Create initializer for clone
     * Note The method signature is created on chain to prevent malicious initialization args
     */
    function _createInitializer(
        InitializerParams memory params
    ) internal view returns (bytes memory) {
        return
            abi.encodeWithSignature(
                "initialize(string,string,string,uint256,uint24,address,address,address,address[],address)",
                params.name,
                params.symbol,
                uri,
                params.id,
                params.maxSupply,
                eclipseAdmin,
                params.contractAdmin,
                params.artist,
                params.minters,
                params.paymentSplitter
            );
    }

    /**
     * @dev Cone an implementation contract
     */
    function cloneCollectionContract(
        CollectionParams memory params
    ) external onlyAdmin returns (address, uint256) {
        address implementation = erc721Implementations[params.erc721Index];
        require(implementation != address(0), "invalid erc721Index");
        uint24 maxSupply = params.maxSupply;
        require(maxSupply <= 99_999, "maxSupply must not be greater 99.999");
        uint8 collectionType = params.collectionType;
        uint256 id = _getNextCollectionId(collectionType);
        address paymentSplitter = params.paymentSplitter;
        address artist = params.artist;
        address contractAdmin = params.contractAdmin;
        address[] memory minters = params.minters;
        string memory symbol = params.symbol;
        string memory name = params.name;
        string memory script = params.script;
        bytes memory initializer = _createInitializer(
            InitializerParams(
                id,
                artist,
                name,
                symbol,
                maxSupply,
                contractAdmin,
                minters,
                paymentSplitter
            )
        );
        address instance = Clones.cloneDeterministic(
            implementation,
            bytes32(block.number)
        );
        Address.functionCall(instance, initializer);
        emit Created(
            CollectionEvent(
                id,
                instance,
                collectionType,
                artist,
                name,
                symbol,
                script,
                maxSupply,
                implementation,
                paymentSplitter
            )
        );
        return (instance, id);
    }

    /**
     * @dev Add an ERC721 implementation contract and map by index
     */
    function addErc721Implementation(
        uint8 index,
        address implementation
    ) external onlyAdmin {
        erc721Implementations[index] = implementation;
    }

    /**
     * @dev Add a collectionType and map by index
     */
    function addCollectionType(
        uint8 index,
        string memory name,
        uint256 prefix,
        uint256 lastId
    ) external onlyAdmin {
        collectionTypes[index] = CollectionType(name, prefix, lastId);
    }

    /**
     * @dev Sets the base tokenURI for collections
     */
    function setUri(string memory uri_) external onlyAdmin {
        uri = uri_;
    }

    /**
     * @dev Predict contract address for new collection
     */
    function predictDeterministicAddress(
        uint8 erc721Index
    ) external view returns (address) {
        return
            Clones.predictDeterministicAddress(
                erc721Implementations[erc721Index],
                bytes32(block.number),
                address(this)
            );
    }
}

// File: contracts/factory/EclipsePaymentSplitterFactory.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import {Clones} from "@openzeppelin/contracts/proxy/Clones.sol";
import {Address} from "@openzeppelin/contracts/utils/Address.sol";
import {EclipseAccess} from "../access/EclipseAccess.sol";

/**
 * Eclipse {EclipsePaymentSplitter} contract factory
 */

contract EclipsePaymentSplitterFactory is EclipseAccess {
    struct Payment {
        address[] payees;
        uint24[] shares;
    }
    address public implementation;

    event Created(
        address contractAddress,
        address artist,
        address[] payeesMint,
        address[] payeesRoyalties,
        uint24[] sharesMint,
        uint24[] sharesRoyalties
    );

    constructor(address implementation_) EclipseAccess() {
        implementation = implementation_;
    }

    /**
     * @dev Intenal helper method to create initializer
     */
    function _createInitializer(
        address owner,
        address platformPayout,
        address[] memory payeesMint,
        address[] memory payeesRoyalties,
        uint24[] memory sharesMint,
        uint24[] memory sharesRoyalties
    ) internal pure returns (bytes memory) {
        return
            abi.encodeWithSignature(
                "initialize(address,address,address[],address[],uint24[],uint24[])",
                owner,
                platformPayout,
                payeesMint,
                payeesRoyalties,
                sharesMint,
                sharesRoyalties
            );
    }

    /**
     * @dev Cone a {PaymentSplitter} implementation contract
     */
    function clone(
        address owner,
        address platformPayout,
        address artist,
        address[] memory payeesMint,
        address[] memory payeesRoyalties,
        uint24[] memory sharesMint,
        uint24[] memory sharesRoyalties
    ) external onlyAdmin returns (address) {
        bytes memory initializer = _createInitializer(
            owner,
            platformPayout,
            payeesMint,
            payeesRoyalties,
            sharesMint,
            sharesRoyalties
        );
        address instance = Clones.clone(implementation);
        Address.functionCall(instance, initializer);
        emit Created(
            instance,
            artist,
            payeesMint,
            payeesRoyalties,
            sharesMint,
            sharesRoyalties
        );
        return instance;
    }

    /**
     * @dev Set the {EclipsePaymentSplitter} implementation
     */
    function setImplementation(address implementation_) external onlyAdmin {
        implementation = implementation_;
    }
}

// File: contracts/storage/EclipseStorage.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;
import {EclipseAccess} from "../access/EclipseAccess.sol";
import {EclipseCollectionFactory} from "../factory/EclipseCollectionFactory.sol";
import {EclipsePaymentSplitterFactory} from "../factory/EclipsePaymentSplitterFactory.sol";
import {IEclipseERC721} from "../interface/IEclipseERC721.sol";
import {IEclipseMinter} from "../interface/IEclipseMinter.sol";

/**
 * @dev Eclipse
 * Admin of {EclipseCollectionFactory} and {EclipsePaymentSplitterFactory}
 */

struct Collection {
    uint256 id;
    address artist;
    address contractAddress;
    uint256 maxSupply;
    string script;
    address paymentSplitter;
}

struct Artist {
    address wallet;
    address[] collections;
}

contract EclipseStorage is EclipseAccess {
    mapping(address => Collection) public collections;
    mapping(address => Artist) public artists;

    event ScriptUpdated(address collection, string script);

    /**
     * @dev Helper function to get {PaymentSplitter} of artist
     */
    function getPaymentSplitterForCollection(
        address collection
    ) external view returns (address) {
        return collections[collection].paymentSplitter;
    }

    /**
     * @dev Update script of collection
     * @param collection contract address of the collection
     * @param script single html as string
     */
    function updateScript(address collection, string memory script) external {
        require(collections[collection].artist == _msgSender(), "not allowed");
        collections[collection].script = script;
        emit ScriptUpdated(collection, script);
    }

    /**
     * @dev set collection
     * @param collection contract object
     */
    function setCollection(Collection calldata collection) external onlyAdmin {
        collections[collection.contractAddress] = collection;
        artists[collection.artist].collections.push(collection.contractAddress);
    }

    /**
     * @dev set collection
     * @param artist artist object
     */
    function setArtist(Artist calldata artist) external onlyAdmin {
        artists[artist.wallet] = artist;
    }

    /**
     * @dev Get artist struct
     * @param artist adress of artist
     */
    function getArtist(address artist) external view returns (Artist memory) {
        return artists[artist];
    }

    /**
     * @dev Get collection struct
     * @param collection collection address
     */
    function getCollection(
        address collection
    ) external view returns (Collection memory) {
        return collections[collection];
    }

    /**
     * @dev Get artist of collection
     * @param collection collection address
     */
    function getArtistOfCollection(
        address collection
    ) external view returns (address) {
        return collections[collection].artist;
    }

    /**
     * @dev Update payment splitter for collection
     * @param paymentSplitter address of new payment splitter
     */
    function setPaymentSplitter(
        address collection,
        address paymentSplitter
    ) external onlyAdmin {
        collections[collection].paymentSplitter = paymentSplitter;
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

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

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

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

// File: @openzeppelin/contracts/proxy/Clones.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/Clones.sol)

pragma solidity ^0.8.0;

/**
 * @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
 * deploying minimal proxy contracts, also known as "clones".
 *
 * > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
 * > a minimal bytecode implementation that delegates all calls to a known, fixed address.
 *
 * The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
 * (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
 * deterministic method.
 *
 * _Available since v3.4._
 */
library Clones {
    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
     *
     * This function uses the create opcode, which should never revert.
     */
    function clone(address implementation) internal returns (address instance) {
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create(0, ptr, 0x37)
        }
        require(instance != address(0), "ERC1167: create failed");
    }

    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
     *
     * This function uses the create2 opcode and a `salt` to deterministically deploy
     * the clone. Using the same `implementation` and `salt` multiple time will revert, since
     * the clones cannot be deployed twice at the same address.
     */
    function cloneDeterministic(address implementation, bytes32 salt) internal returns (address instance) {
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create2(0, ptr, 0x37, salt)
        }
        require(instance != address(0), "ERC1167: create2 failed");
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(
        address implementation,
        bytes32 salt,
        address deployer
    ) internal pure returns (address predicted) {
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
            mstore(add(ptr, 0x38), shl(0x60, deployer))
            mstore(add(ptr, 0x4c), salt)
            mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
            predicted := keccak256(add(ptr, 0x37), 0x55)
        }
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(address implementation, bytes32 salt)
        internal
        view
        returns (address predicted)
    {
        return predictDeterministicAddress(implementation, salt, address(this));
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}