Contract Address Details

// Sources flattened with hardhat v2.9.3 https://hardhat.org

// File @openzeppelin/contracts/utils/[email protected]

// 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/access/[email protected]

// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

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

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

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

// 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 IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}


// File @openzeppelin/contracts/interfaces/[email protected]

// OpenZeppelin Contracts v4.4.1 (interfaces/IERC165.sol)

pragma solidity ^0.8.0;


// File @openzeppelin/contracts/interfaces/[email protected]

// OpenZeppelin Contracts v4.4.1 (interfaces/IERC2981.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface for the NFT Royalty Standard
 */
interface IERC2981 is IERC165 {
    /**
     * @dev Called with the sale price to determine how much royalty is owed and to whom.
     * @param tokenId - the NFT asset queried for royalty information
     * @param salePrice - the sale price of the NFT asset specified by `tokenId`
     * @return receiver - address of who should be sent the royalty payment
     * @return royaltyAmount - the royalty payment amount for `salePrice`
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        returns (address receiver, uint256 royaltyAmount);
}


// File contracts/interfaces/IRoyaltyFeeManager.sol

pragma solidity ^0.8.0;

interface IRoyaltyFeeManager {
    function calculateRoyaltyFeeAndGetRecipient(
        address collection,
        uint256 tokenId,
        uint256 amount
    ) external view returns (address, uint256);
}


// File contracts/interfaces/IRoyaltyFeeRegistry.sol

pragma solidity ^0.8.0;

interface IRoyaltyFeeRegistry {
    function updateRoyaltyInfoForCollection(
        address collection,
        address setter,
        address receiver,
        uint256 fee
    ) external;

    function updateRoyaltyFeeLimit(uint256 _royaltyFeeLimit) external;

    function royaltyInfo(address collection, uint256 amount) external view returns (address, uint256);

    function royaltyFeeInfoCollection(address collection)
        external
        view
        returns (
            address,
            address,
            uint256
        );
}


// File contracts/RoyaltyFeeManager.sol

pragma solidity ^0.8.0;



/**
 * @title RoyaltyFeeManager
 * @notice It handles the logic to check and transfer royalty fees (if any).
 */
contract RoyaltyFeeManager is IRoyaltyFeeManager, Ownable {
    // https://eips.ethereum.org/EIPS/eip-2981
    bytes4 public constant INTERFACE_ID_ERC2981 = 0x2a55205a;

    IRoyaltyFeeRegistry public immutable royaltyFeeRegistry;

    /**
     * @notice Constructor
     * @param _royaltyFeeRegistry address of the RoyaltyFeeRegistry
     */
    constructor(address _royaltyFeeRegistry) {
        royaltyFeeRegistry = IRoyaltyFeeRegistry(_royaltyFeeRegistry);
    }

    /**
     * @notice Calculate royalty fee and get recipient
     * @param collection address of the NFT contract
     * @param tokenId tokenId
     * @param amount amount to transfer
     */
    function calculateRoyaltyFeeAndGetRecipient(
        address collection,
        uint256 tokenId,
        uint256 amount
    ) external view override returns (address, uint256) {
        // 1. Check if there is a royalty info in the system
        (address receiver, uint256 royaltyAmount) = royaltyFeeRegistry.royaltyInfo(collection, amount);

        // 2. If the receiver is address(0), fee is null, check if it supports the ERC2981 interface
        if ((receiver == address(0)) || (royaltyAmount == 0)) {
            if (IERC165(collection).supportsInterface(INTERFACE_ID_ERC2981)) {
                (receiver, royaltyAmount) = IERC2981(collection).royaltyInfo(tokenId, amount);
            }
        }
        return (receiver, royaltyAmount);
    }
}