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0xE574DdD69079A87222f282AA40f2d3B05303e93B
 

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Contract Source Code Verified (Exact Match)

Contract Name:
LandProxy

Compiler Version
v0.8.13+commit.abaa5c0e

Optimization Enabled:
Yes with 10000 runs

Other Settings:
default evmVersion, MIT license
File 1 of 41 : LandProxy.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@solidstate/contracts/access/ownable/OwnableInternal.sol";
import "@solidstate/contracts/introspection/ERC165Storage.sol";
import "@solidstate/contracts/proxy/diamond/SolidStateDiamond.sol";
import "@solidstate/contracts/token/ERC1155/IERC1155.sol";
import "@solidstate/contracts/token/ERC1155/metadata/IERC1155Metadata.sol";
import "@solidstate/contracts/token/ERC1155/metadata/ERC1155MetadataStorage.sol";

import "../vendor/ERC2981/IERC2981Royalties.sol";
import "../vendor/ERC2981/ERC2981Storage.sol";
import "../vendor/OpenSea/OpenSeaCompatible.sol";
import "../vendor/OpenSea/OpenSeaProxyStorage.sol";

import "./LandStorage.sol";
import "./LandTypes.sol";

contract LandProxy is SolidStateDiamond {
	using ERC165Storage for ERC165Storage.Layout;

	constructor() {
		ERC165Storage.layout().setSupportedInterface(type(IERC1155).interfaceId, true);
		ERC165Storage.layout().setSupportedInterface(type(IERC1155Metadata).interfaceId, true);
		ERC165Storage.layout().setSupportedInterface(type(IERC2981Royalties).interfaceId, true);
	}
}

contract LandProxyInitializer {
	function init(
		LandInitArgs memory landInit,
		RoyaltyInfo memory royaltyInit,
		OpenSeaProxyInitArgs memory osInit,
		string memory contractURI,
		string memory baseURI
	) external {
		// Init ERC1155Metadata
		ERC1155MetadataStorage.layout().baseURI = baseURI;
		OpenSeaCompatibleStorage.layout().contractURI = contractURI;

		// Init Land
		LandStorage.layout().mintState = uint8(MintState.CLOSED);
		LandStorage.layout().price = 0.2 ether;

		LandStorage.layout().signer = landInit.signer;
		LandStorage.layout().avatars = landInit.avatars;

		LandStorage.layout().avatarClaim = landInit.avatarClaim;

		// loop thru the zones for sale
		for (uint8 i = 0; i < landInit.zones.length; i++) {
			LandStorage._addZone(landInit.zones[i]);
		}

		// Init Royalties
		ERC2981Storage.layout().royalties = royaltyInit;

		// Init Opensea Proxy
		OpenSeaProxyStorage._setProxies(osInit);
	}
}

File 2 of 41 : IERC173.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IERC173Internal } from './IERC173Internal.sol';

/**
 * @title Contract ownership standard interface
 * @dev see https://eips.ethereum.org/EIPS/eip-173
 */
interface IERC173 is IERC173Internal {
    /**
     * @notice get the ERC173 contract owner
     * @return conrtact owner
     */
    function owner() external view returns (address);

    /**
     * @notice transfer contract ownership to new account
     * @param account address of new owner
     */
    function transferOwnership(address account) external;
}

File 3 of 41 : IERC173Internal.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title Partial ERC173 interface needed by internal functions
 */
interface IERC173Internal {
    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );
}

File 4 of 41 : IOwnable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IERC173 } from '../IERC173.sol';

interface IOwnable is IERC173 {}

File 5 of 41 : IOwnableInternal.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IERC173Internal } from '../IERC173Internal.sol';

interface IOwnableInternal is IERC173Internal {}

File 6 of 41 : ISafeOwnable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IOwnable } from './IOwnable.sol';

interface ISafeOwnable is IOwnable {
    /**
     * @notice get the nominated owner who has permission to call acceptOwnership
     */
    function nomineeOwner() external view returns (address);

    /**
     * @notice accept transfer of contract ownership
     */
    function acceptOwnership() external;
}

File 7 of 41 : ISafeOwnableInternal.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IOwnableInternal } from './IOwnableInternal.sol';

interface ISafeOwnableInternal is IOwnableInternal {}

File 8 of 41 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IERC173 } from '../IERC173.sol';
import { IOwnable } from './IOwnable.sol';
import { OwnableInternal } from './OwnableInternal.sol';
import { OwnableStorage } from './OwnableStorage.sol';

/**
 * @title Ownership access control based on ERC173
 */
abstract contract Ownable is IOwnable, OwnableInternal {
    using OwnableStorage for OwnableStorage.Layout;

    /**
     * @inheritdoc IERC173
     */
    function owner() public view virtual returns (address) {
        return _owner();
    }

    /**
     * @inheritdoc IERC173
     */
    function transferOwnership(address account) public virtual onlyOwner {
        _transferOwnership(account);
    }
}

File 9 of 41 : OwnableInternal.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IOwnableInternal } from './IOwnableInternal.sol';
import { OwnableStorage } from './OwnableStorage.sol';

abstract contract OwnableInternal is IOwnableInternal {
    using OwnableStorage for OwnableStorage.Layout;

    modifier onlyOwner() {
        require(
            msg.sender == OwnableStorage.layout().owner,
            'Ownable: sender must be owner'
        );
        _;
    }

    function _owner() internal view virtual returns (address) {
        return OwnableStorage.layout().owner;
    }

    function _transferOwnership(address account) internal virtual {
        OwnableStorage.layout().setOwner(account);
        emit OwnershipTransferred(msg.sender, account);
    }
}

File 10 of 41 : OwnableStorage.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

library OwnableStorage {
    struct Layout {
        address owner;
    }

    bytes32 internal constant STORAGE_SLOT =
        keccak256('solidstate.contracts.storage.Ownable');

    function layout() internal pure returns (Layout storage l) {
        bytes32 slot = STORAGE_SLOT;
        assembly {
            l.slot := slot
        }
    }

    function setOwner(Layout storage l, address owner) internal {
        l.owner = owner;
    }
}

File 11 of 41 : SafeOwnable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { Ownable, OwnableStorage } from './Ownable.sol';
import { ISafeOwnable } from './ISafeOwnable.sol';
import { OwnableInternal } from './OwnableInternal.sol';
import { SafeOwnableInternal } from './SafeOwnableInternal.sol';

/**
 * @title Ownership access control based on ERC173 with ownership transfer safety check
 */
abstract contract SafeOwnable is ISafeOwnable, Ownable, SafeOwnableInternal {
    /**
     * @inheritdoc ISafeOwnable
     */
    function nomineeOwner() public view virtual returns (address) {
        return _nomineeOwner();
    }

    /**
     * @inheritdoc ISafeOwnable
     */
    function acceptOwnership() public virtual onlyNomineeOwner {
        _acceptOwnership();
    }

    function _transferOwnership(address account)
        internal
        virtual
        override(OwnableInternal, SafeOwnableInternal)
    {
        super._transferOwnership(account);
    }
}

File 12 of 41 : SafeOwnableInternal.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { ISafeOwnableInternal } from './ISafeOwnableInternal.sol';
import { OwnableInternal } from './OwnableInternal.sol';
import { OwnableStorage } from './OwnableStorage.sol';
import { SafeOwnableStorage } from './SafeOwnableStorage.sol';

abstract contract SafeOwnableInternal is ISafeOwnableInternal, OwnableInternal {
    using OwnableStorage for OwnableStorage.Layout;
    using SafeOwnableStorage for SafeOwnableStorage.Layout;

    modifier onlyNomineeOwner() {
        require(
            msg.sender == _nomineeOwner(),
            'SafeOwnable: sender must be nominee owner'
        );
        _;
    }

    /**
     * @notice get the nominated owner who has permission to call acceptOwnership
     */
    function _nomineeOwner() internal view virtual returns (address) {
        return SafeOwnableStorage.layout().nomineeOwner;
    }

    /**
     * @notice accept transfer of contract ownership
     */
    function _acceptOwnership() internal virtual {
        OwnableStorage.Layout storage l = OwnableStorage.layout();
        emit OwnershipTransferred(l.owner, msg.sender);
        l.setOwner(msg.sender);
        SafeOwnableStorage.layout().setNomineeOwner(address(0));
    }

    /**
     * @notice set nominee owner, granting permission to call acceptOwnership
     */
    function _transferOwnership(address account) internal virtual override {
        SafeOwnableStorage.layout().setNomineeOwner(account);
    }
}

File 13 of 41 : SafeOwnableStorage.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

library SafeOwnableStorage {
    struct Layout {
        address nomineeOwner;
    }

    bytes32 internal constant STORAGE_SLOT =
        keccak256('solidstate.contracts.storage.SafeOwnable');

    function layout() internal pure returns (Layout storage l) {
        bytes32 slot = STORAGE_SLOT;
        assembly {
            l.slot := slot
        }
    }

    function setNomineeOwner(Layout storage l, address nomineeOwner) internal {
        l.nomineeOwner = nomineeOwner;
    }
}

File 14 of 41 : ERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IERC165 } from './IERC165.sol';
import { ERC165Storage } from './ERC165Storage.sol';

/**
 * @title ERC165 implementation
 */
abstract contract ERC165 is IERC165 {
    using ERC165Storage for ERC165Storage.Layout;

    /**
     * @inheritdoc IERC165
     */
    function supportsInterface(bytes4 interfaceId) public view returns (bool) {
        return ERC165Storage.layout().isSupportedInterface(interfaceId);
    }
}

File 15 of 41 : ERC165Storage.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

library ERC165Storage {
    struct Layout {
        mapping(bytes4 => bool) supportedInterfaces;
    }

    bytes32 internal constant STORAGE_SLOT =
        keccak256('solidstate.contracts.storage.ERC165');

    function layout() internal pure returns (Layout storage l) {
        bytes32 slot = STORAGE_SLOT;
        assembly {
            l.slot := slot
        }
    }

    function isSupportedInterface(Layout storage l, bytes4 interfaceId)
        internal
        view
        returns (bool)
    {
        return l.supportedInterfaces[interfaceId];
    }

    function setSupportedInterface(
        Layout storage l,
        bytes4 interfaceId,
        bool status
    ) internal {
        require(interfaceId != 0xffffffff, 'ERC165: invalid interface id');
        l.supportedInterfaces[interfaceId] = status;
    }
}

File 16 of 41 : IERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title ERC165 interface registration interface
 * @dev see https://eips.ethereum.org/EIPS/eip-165
 */
interface IERC165 {
    /**
     * @notice query whether contract has registered support for given interface
     * @param interfaceId interface id
     * @return bool whether interface is supported
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

File 17 of 41 : IProxy.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

interface IProxy {
    fallback() external payable;
}

File 18 of 41 : Proxy.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { AddressUtils } from '../utils/AddressUtils.sol';
import { IProxy } from './IProxy.sol';

/**
 * @title Base proxy contract
 */
abstract contract Proxy is IProxy {
    using AddressUtils for address;

    /**
     * @notice delegate all calls to implementation contract
     * @dev reverts if implementation address contains no code, for compatibility with metamorphic contracts
     * @dev memory location in use by assembly may be unsafe in other contexts
     */
    fallback() external payable virtual {
        address implementation = _getImplementation();

        require(
            implementation.isContract(),
            'Proxy: implementation must be contract'
        );

        assembly {
            calldatacopy(0, 0, calldatasize())
            let result := delegatecall(
                gas(),
                implementation,
                0,
                calldatasize(),
                0,
                0
            )
            returndatacopy(0, 0, returndatasize())

            switch result
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    /**
     * @notice get logic implementation address
     * @return implementation address
     */
    function _getImplementation() internal virtual returns (address);
}

File 19 of 41 : ISolidStateDiamond.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { ISafeOwnable } from '../../access/ownable/ISafeOwnable.sol';
import { IERC165 } from '../../introspection/IERC165.sol';
import { IDiamondBase } from './base/IDiamondBase.sol';
import { IDiamondReadable } from './readable/IDiamondReadable.sol';
import { IDiamondWritable } from './writable/IDiamondWritable.sol';

interface ISolidStateDiamond is
    IDiamondBase,
    IDiamondReadable,
    IDiamondWritable,
    ISafeOwnable,
    IERC165
{
    receive() external payable;

    /**
     * @notice get the address of the fallback contract
     * @return fallback address
     */
    function getFallbackAddress() external view returns (address);

    /**
     * @notice set the address of the fallback contract
     * @param fallbackAddress fallback address
     */
    function setFallbackAddress(address fallbackAddress) external;
}

File 20 of 41 : SolidStateDiamond.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IOwnable, Ownable, OwnableInternal, OwnableStorage } from '../../access/ownable/Ownable.sol';
import { ISafeOwnable, SafeOwnable } from '../../access/ownable/SafeOwnable.sol';
import { IERC173 } from '../../access/IERC173.sol';
import { ERC165, IERC165, ERC165Storage } from '../../introspection/ERC165.sol';
import { DiamondBase, DiamondBaseStorage } from './base/DiamondBase.sol';
import { DiamondReadable, IDiamondReadable } from './readable/DiamondReadable.sol';
import { DiamondWritable, IDiamondWritable } from './writable/DiamondWritable.sol';
import { ISolidStateDiamond } from './ISolidStateDiamond.sol';

/**
 * @title SolidState "Diamond" proxy reference implementation
 */
abstract contract SolidStateDiamond is
    ISolidStateDiamond,
    DiamondBase,
    DiamondReadable,
    DiamondWritable,
    SafeOwnable,
    ERC165
{
    using DiamondBaseStorage for DiamondBaseStorage.Layout;
    using ERC165Storage for ERC165Storage.Layout;
    using OwnableStorage for OwnableStorage.Layout;

    constructor() {
        ERC165Storage.Layout storage erc165 = ERC165Storage.layout();
        bytes4[] memory selectors = new bytes4[](12);

        // register DiamondWritable

        selectors[0] = IDiamondWritable.diamondCut.selector;

        erc165.setSupportedInterface(type(IDiamondWritable).interfaceId, true);

        // register DiamondReadable

        selectors[1] = IDiamondReadable.facets.selector;
        selectors[2] = IDiamondReadable.facetFunctionSelectors.selector;
        selectors[3] = IDiamondReadable.facetAddresses.selector;
        selectors[4] = IDiamondReadable.facetAddress.selector;

        erc165.setSupportedInterface(type(IDiamondReadable).interfaceId, true);

        // register ERC165

        selectors[5] = IERC165.supportsInterface.selector;

        erc165.setSupportedInterface(type(IERC165).interfaceId, true);

        // register SafeOwnable

        selectors[6] = Ownable.owner.selector;
        selectors[7] = SafeOwnable.nomineeOwner.selector;
        selectors[8] = Ownable.transferOwnership.selector;
        selectors[9] = SafeOwnable.acceptOwnership.selector;

        erc165.setSupportedInterface(type(IERC173).interfaceId, true);

        // register Diamond

        selectors[10] = SolidStateDiamond.getFallbackAddress.selector;
        selectors[11] = SolidStateDiamond.setFallbackAddress.selector;

        // diamond cut

        FacetCut[] memory facetCuts = new FacetCut[](1);

        facetCuts[0] = FacetCut({
            target: address(this),
            action: IDiamondWritable.FacetCutAction.ADD,
            selectors: selectors
        });

        DiamondBaseStorage.layout().diamondCut(facetCuts, address(0), '');

        // set owner

        OwnableStorage.layout().setOwner(msg.sender);
    }

    receive() external payable {}

    /**
     * @inheritdoc ISolidStateDiamond
     */
    function getFallbackAddress() external view returns (address) {
        return DiamondBaseStorage.layout().fallbackAddress;
    }

    /**
     * @inheritdoc ISolidStateDiamond
     */
    function setFallbackAddress(address fallbackAddress) external onlyOwner {
        DiamondBaseStorage.layout().fallbackAddress = fallbackAddress;
    }

    function _transferOwnership(address account)
        internal
        virtual
        override(OwnableInternal, SafeOwnable)
    {
        super._transferOwnership(account);
    }
}

File 21 of 41 : DiamondBase.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { Proxy } from '../../Proxy.sol';
import { IDiamondBase } from './IDiamondBase.sol';
import { DiamondBaseStorage } from './DiamondBaseStorage.sol';

/**
 * @title EIP-2535 "Diamond" proxy base contract
 * @dev see https://eips.ethereum.org/EIPS/eip-2535
 */
abstract contract DiamondBase is IDiamondBase, Proxy {
    /**
     * @inheritdoc Proxy
     */
    function _getImplementation() internal view override returns (address) {
        // inline storage layout retrieval uses less gas
        DiamondBaseStorage.Layout storage l;
        bytes32 slot = DiamondBaseStorage.STORAGE_SLOT;
        assembly {
            l.slot := slot
        }

        address implementation = address(bytes20(l.facets[msg.sig]));

        if (implementation == address(0)) {
            implementation = l.fallbackAddress;
            require(
                implementation != address(0),
                'DiamondBase: no facet found for function signature'
            );
        }

        return implementation;
    }
}

File 22 of 41 : DiamondBaseStorage.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { AddressUtils } from '../../../utils/AddressUtils.sol';
import { IDiamondWritable } from '../writable/IDiamondWritable.sol';

/**
 * @dev derived from https://github.com/mudgen/diamond-2 (MIT license)
 */
library DiamondBaseStorage {
    using AddressUtils for address;
    using DiamondBaseStorage for DiamondBaseStorage.Layout;

    struct Layout {
        // function selector => (facet address, selector slot position)
        mapping(bytes4 => bytes32) facets;
        // total number of selectors registered
        uint16 selectorCount;
        // array of selector slots with 8 selectors per slot
        mapping(uint256 => bytes32) selectorSlots;
        address fallbackAddress;
    }

    bytes32 constant CLEAR_ADDRESS_MASK =
        bytes32(uint256(0xffffffffffffffffffffffff));
    bytes32 constant CLEAR_SELECTOR_MASK = bytes32(uint256(0xffffffff << 224));

    bytes32 internal constant STORAGE_SLOT =
        keccak256('solidstate.contracts.storage.DiamondBase');

    event DiamondCut(
        IDiamondWritable.FacetCut[] facetCuts,
        address target,
        bytes data
    );

    function layout() internal pure returns (Layout storage l) {
        bytes32 slot = STORAGE_SLOT;
        assembly {
            l.slot := slot
        }
    }

    /**
     * @notice update functions callable on Diamond proxy
     * @param l storage layout
     * @param facetCuts array of structured Diamond facet update data
     * @param target optional recipient of initialization delegatecall
     * @param data optional initialization call data
     */
    function diamondCut(
        Layout storage l,
        IDiamondWritable.FacetCut[] memory facetCuts,
        address target,
        bytes memory data
    ) internal {
        unchecked {
            uint256 originalSelectorCount = l.selectorCount;
            uint256 selectorCount = originalSelectorCount;
            bytes32 selectorSlot;

            // Check if last selector slot is not full
            if (selectorCount & 7 > 0) {
                // get last selectorSlot
                selectorSlot = l.selectorSlots[selectorCount >> 3];
            }

            for (uint256 i; i < facetCuts.length; i++) {
                IDiamondWritable.FacetCut memory facetCut = facetCuts[i];
                IDiamondWritable.FacetCutAction action = facetCut.action;

                require(
                    facetCut.selectors.length > 0,
                    'DiamondBase: no selectors specified'
                );

                if (action == IDiamondWritable.FacetCutAction.ADD) {
                    (selectorCount, selectorSlot) = l.addFacetSelectors(
                        selectorCount,
                        selectorSlot,
                        facetCut
                    );
                } else if (action == IDiamondWritable.FacetCutAction.REPLACE) {
                    l.replaceFacetSelectors(facetCut);
                } else if (action == IDiamondWritable.FacetCutAction.REMOVE) {
                    (selectorCount, selectorSlot) = l.removeFacetSelectors(
                        selectorCount,
                        selectorSlot,
                        facetCut
                    );
                }
            }

            if (selectorCount != originalSelectorCount) {
                l.selectorCount = uint16(selectorCount);
            }

            // If last selector slot is not full
            if (selectorCount & 7 > 0) {
                l.selectorSlots[selectorCount >> 3] = selectorSlot;
            }

            emit DiamondCut(facetCuts, target, data);
            initialize(target, data);
        }
    }

    function addFacetSelectors(
        Layout storage l,
        uint256 selectorCount,
        bytes32 selectorSlot,
        IDiamondWritable.FacetCut memory facetCut
    ) internal returns (uint256, bytes32) {
        unchecked {
            require(
                facetCut.target == address(this) ||
                    facetCut.target.isContract(),
                'DiamondBase: ADD target has no code'
            );

            for (uint256 i; i < facetCut.selectors.length; i++) {
                bytes4 selector = facetCut.selectors[i];
                bytes32 oldFacet = l.facets[selector];

                require(
                    address(bytes20(oldFacet)) == address(0),
                    'DiamondBase: selector already added'
                );

                // add facet for selector
                l.facets[selector] =
                    bytes20(facetCut.target) |
                    bytes32(selectorCount);
                uint256 selectorInSlotPosition = (selectorCount & 7) << 5;

                // clear selector position in slot and add selector
                selectorSlot =
                    (selectorSlot &
                        ~(CLEAR_SELECTOR_MASK >> selectorInSlotPosition)) |
                    (bytes32(selector) >> selectorInSlotPosition);

                // if slot is full then write it to storage
                if (selectorInSlotPosition == 224) {
                    l.selectorSlots[selectorCount >> 3] = selectorSlot;
                    selectorSlot = 0;
                }

                selectorCount++;
            }

            return (selectorCount, selectorSlot);
        }
    }

    function removeFacetSelectors(
        Layout storage l,
        uint256 selectorCount,
        bytes32 selectorSlot,
        IDiamondWritable.FacetCut memory facetCut
    ) internal returns (uint256, bytes32) {
        unchecked {
            require(
                facetCut.target == address(0),
                'DiamondBase: REMOVE target must be zero address'
            );

            uint256 selectorSlotCount = selectorCount >> 3;
            uint256 selectorInSlotIndex = selectorCount & 7;

            for (uint256 i; i < facetCut.selectors.length; i++) {
                bytes4 selector = facetCut.selectors[i];
                bytes32 oldFacet = l.facets[selector];

                require(
                    address(bytes20(oldFacet)) != address(0),
                    'DiamondBase: selector not found'
                );

                require(
                    address(bytes20(oldFacet)) != address(this),
                    'DiamondBase: selector is immutable'
                );

                if (selectorSlot == 0) {
                    selectorSlotCount--;
                    selectorSlot = l.selectorSlots[selectorSlotCount];
                    selectorInSlotIndex = 7;
                } else {
                    selectorInSlotIndex--;
                }

                bytes4 lastSelector;
                uint256 oldSelectorsSlotCount;
                uint256 oldSelectorInSlotPosition;

                // adding a block here prevents stack too deep error
                {
                    // replace selector with last selector in l.facets
                    lastSelector = bytes4(
                        selectorSlot << (selectorInSlotIndex << 5)
                    );

                    if (lastSelector != selector) {
                        // update last selector slot position info
                        l.facets[lastSelector] =
                            (oldFacet & CLEAR_ADDRESS_MASK) |
                            bytes20(l.facets[lastSelector]);
                    }

                    delete l.facets[selector];
                    uint256 oldSelectorCount = uint16(uint256(oldFacet));
                    oldSelectorsSlotCount = oldSelectorCount >> 3;
                    oldSelectorInSlotPosition = (oldSelectorCount & 7) << 5;
                }

                if (oldSelectorsSlotCount != selectorSlotCount) {
                    bytes32 oldSelectorSlot = l.selectorSlots[
                        oldSelectorsSlotCount
                    ];

                    // clears the selector we are deleting and puts the last selector in its place.
                    oldSelectorSlot =
                        (oldSelectorSlot &
                            ~(CLEAR_SELECTOR_MASK >>
                                oldSelectorInSlotPosition)) |
                        (bytes32(lastSelector) >> oldSelectorInSlotPosition);

                    // update storage with the modified slot
                    l.selectorSlots[oldSelectorsSlotCount] = oldSelectorSlot;
                } else {
                    // clears the selector we are deleting and puts the last selector in its place.
                    selectorSlot =
                        (selectorSlot &
                            ~(CLEAR_SELECTOR_MASK >>
                                oldSelectorInSlotPosition)) |
                        (bytes32(lastSelector) >> oldSelectorInSlotPosition);
                }

                if (selectorInSlotIndex == 0) {
                    delete l.selectorSlots[selectorSlotCount];
                    selectorSlot = 0;
                }
            }

            selectorCount = (selectorSlotCount << 3) | selectorInSlotIndex;

            return (selectorCount, selectorSlot);
        }
    }

    function replaceFacetSelectors(
        Layout storage l,
        IDiamondWritable.FacetCut memory facetCut
    ) internal {
        unchecked {
            require(
                facetCut.target.isContract(),
                'DiamondBase: REPLACE target has no code'
            );

            for (uint256 i; i < facetCut.selectors.length; i++) {
                bytes4 selector = facetCut.selectors[i];
                bytes32 oldFacet = l.facets[selector];
                address oldFacetAddress = address(bytes20(oldFacet));

                require(
                    oldFacetAddress != address(0),
                    'DiamondBase: selector not found'
                );

                require(
                    oldFacetAddress != address(this),
                    'DiamondBase: selector is immutable'
                );

                require(
                    oldFacetAddress != facetCut.target,
                    'DiamondBase: REPLACE target is identical'
                );

                // replace old facet address
                l.facets[selector] =
                    (oldFacet & CLEAR_ADDRESS_MASK) |
                    bytes20(facetCut.target);
            }
        }
    }

    function initialize(address target, bytes memory data) private {
        require(
            (target == address(0)) == (data.length == 0),
            'DiamondBase: invalid initialization parameters'
        );

        if (target != address(0)) {
            if (target != address(this)) {
                require(
                    target.isContract(),
                    'DiamondBase: initialization target has no code'
                );
            }

            (bool success, ) = target.delegatecall(data);

            if (!success) {
                assembly {
                    returndatacopy(0, 0, returndatasize())
                    revert(0, returndatasize())
                }
            }
        }
    }
}

File 23 of 41 : IDiamondBase.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IProxy } from '../../IProxy.sol';

interface IDiamondBase is IProxy {}

File 24 of 41 : DiamondReadable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { DiamondBaseStorage } from '../base/DiamondBaseStorage.sol';
import { IDiamondReadable } from './IDiamondReadable.sol';

/**
 * @title EIP-2535 "Diamond" proxy introspection contract
 * @dev derived from https://github.com/mudgen/diamond-2 (MIT license)
 */
abstract contract DiamondReadable is IDiamondReadable {
    /**
     * @inheritdoc IDiamondReadable
     */
    function facets() external view returns (Facet[] memory diamondFacets) {
        DiamondBaseStorage.Layout storage l = DiamondBaseStorage.layout();

        diamondFacets = new Facet[](l.selectorCount);

        uint8[] memory numFacetSelectors = new uint8[](l.selectorCount);
        uint256 numFacets;
        uint256 selectorIndex;

        // loop through function selectors
        for (uint256 slotIndex; selectorIndex < l.selectorCount; slotIndex++) {
            bytes32 slot = l.selectorSlots[slotIndex];

            for (
                uint256 selectorSlotIndex;
                selectorSlotIndex < 8;
                selectorSlotIndex++
            ) {
                selectorIndex++;

                if (selectorIndex > l.selectorCount) {
                    break;
                }

                bytes4 selector = bytes4(slot << (selectorSlotIndex << 5));
                address facet = address(bytes20(l.facets[selector]));

                bool continueLoop;

                for (uint256 facetIndex; facetIndex < numFacets; facetIndex++) {
                    if (diamondFacets[facetIndex].target == facet) {
                        diamondFacets[facetIndex].selectors[
                            numFacetSelectors[facetIndex]
                        ] = selector;
                        // probably will never have more than 256 functions from one facet contract
                        require(numFacetSelectors[facetIndex] < 255);
                        numFacetSelectors[facetIndex]++;
                        continueLoop = true;
                        break;
                    }
                }

                if (continueLoop) {
                    continue;
                }

                diamondFacets[numFacets].target = facet;
                diamondFacets[numFacets].selectors = new bytes4[](
                    l.selectorCount
                );
                diamondFacets[numFacets].selectors[0] = selector;
                numFacetSelectors[numFacets] = 1;
                numFacets++;
            }
        }

        for (uint256 facetIndex; facetIndex < numFacets; facetIndex++) {
            uint256 numSelectors = numFacetSelectors[facetIndex];
            bytes4[] memory selectors = diamondFacets[facetIndex].selectors;

            // setting the number of selectors
            assembly {
                mstore(selectors, numSelectors)
            }
        }

        // setting the number of facets
        assembly {
            mstore(diamondFacets, numFacets)
        }
    }

    /**
     * @inheritdoc IDiamondReadable
     */
    function facetFunctionSelectors(address facet)
        external
        view
        returns (bytes4[] memory selectors)
    {
        DiamondBaseStorage.Layout storage l = DiamondBaseStorage.layout();

        selectors = new bytes4[](l.selectorCount);

        uint256 numSelectors;
        uint256 selectorIndex;

        // loop through function selectors
        for (uint256 slotIndex; selectorIndex < l.selectorCount; slotIndex++) {
            bytes32 slot = l.selectorSlots[slotIndex];

            for (
                uint256 selectorSlotIndex;
                selectorSlotIndex < 8;
                selectorSlotIndex++
            ) {
                selectorIndex++;

                if (selectorIndex > l.selectorCount) {
                    break;
                }

                bytes4 selector = bytes4(slot << (selectorSlotIndex << 5));

                if (facet == address(bytes20(l.facets[selector]))) {
                    selectors[numSelectors] = selector;
                    numSelectors++;
                }
            }
        }

        // set the number of selectors in the array
        assembly {
            mstore(selectors, numSelectors)
        }
    }

    /**
     * @inheritdoc IDiamondReadable
     */
    function facetAddresses()
        external
        view
        returns (address[] memory addresses)
    {
        DiamondBaseStorage.Layout storage l = DiamondBaseStorage.layout();

        addresses = new address[](l.selectorCount);
        uint256 numFacets;
        uint256 selectorIndex;

        for (uint256 slotIndex; selectorIndex < l.selectorCount; slotIndex++) {
            bytes32 slot = l.selectorSlots[slotIndex];

            for (
                uint256 selectorSlotIndex;
                selectorSlotIndex < 8;
                selectorSlotIndex++
            ) {
                selectorIndex++;

                if (selectorIndex > l.selectorCount) {
                    break;
                }

                bytes4 selector = bytes4(slot << (selectorSlotIndex << 5));
                address facet = address(bytes20(l.facets[selector]));

                bool continueLoop;

                for (uint256 facetIndex; facetIndex < numFacets; facetIndex++) {
                    if (facet == addresses[facetIndex]) {
                        continueLoop = true;
                        break;
                    }
                }

                if (continueLoop) {
                    continue;
                }

                addresses[numFacets] = facet;
                numFacets++;
            }
        }

        // set the number of facet addresses in the array
        assembly {
            mstore(addresses, numFacets)
        }
    }

    /**
     * @inheritdoc IDiamondReadable
     */
    function facetAddress(bytes4 selector)
        external
        view
        returns (address facet)
    {
        facet = address(bytes20(DiamondBaseStorage.layout().facets[selector]));
    }
}

File 25 of 41 : IDiamondReadable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title Diamond proxy introspection interface
 * @dev see https://eips.ethereum.org/EIPS/eip-2535
 */
interface IDiamondReadable {
    struct Facet {
        address target;
        bytes4[] selectors;
    }

    /**
     * @notice get all facets and their selectors
     * @return diamondFacets array of structured facet data
     */
    function facets() external view returns (Facet[] memory diamondFacets);

    /**
     * @notice get all selectors for given facet address
     * @param facet address of facet to query
     * @return selectors array of function selectors
     */
    function facetFunctionSelectors(address facet)
        external
        view
        returns (bytes4[] memory selectors);

    /**
     * @notice get addresses of all facets used by diamond
     * @return addresses array of facet addresses
     */
    function facetAddresses()
        external
        view
        returns (address[] memory addresses);

    /**
     * @notice get the address of the facet associated with given selector
     * @param selector function selector to query
     * @return facet facet address (zero address if not found)
     */
    function facetAddress(bytes4 selector)
        external
        view
        returns (address facet);
}

File 26 of 41 : DiamondWritable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { OwnableInternal } from '../../../access/ownable/OwnableInternal.sol';
import { DiamondBaseStorage } from '../base/DiamondBaseStorage.sol';
import { IDiamondWritable } from './IDiamondWritable.sol';

/**
 * @title EIP-2535 "Diamond" proxy update contract
 */
abstract contract DiamondWritable is IDiamondWritable, OwnableInternal {
    using DiamondBaseStorage for DiamondBaseStorage.Layout;

    /**
     * @inheritdoc IDiamondWritable
     */
    function diamondCut(
        FacetCut[] calldata facetCuts,
        address target,
        bytes calldata data
    ) external onlyOwner {
        DiamondBaseStorage.layout().diamondCut(facetCuts, target, data);
    }
}

File 27 of 41 : IDiamondWritable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title Diamond proxy upgrade interface
 * @dev see https://eips.ethereum.org/EIPS/eip-2535
 */
interface IDiamondWritable {
    enum FacetCutAction {
        ADD,
        REPLACE,
        REMOVE
    }

    event DiamondCut(FacetCut[] facetCuts, address target, bytes data);

    struct FacetCut {
        address target;
        FacetCutAction action;
        bytes4[] selectors;
    }

    /**
     * @notice update diamond facets and optionally execute arbitrary initialization function
     * @param facetCuts array of structured Diamond facet update data
     * @param target optional target of initialization delegatecall
     * @param data optional initialization function call data
     */
    function diamondCut(
        FacetCut[] calldata facetCuts,
        address target,
        bytes calldata data
    ) external;
}

File 28 of 41 : IERC1155.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IERC1155Internal } from './IERC1155Internal.sol';
import { IERC165 } from '../../introspection/IERC165.sol';

/**
 * @title ERC1155 interface
 * @dev see https://github.com/ethereum/EIPs/issues/1155
 */
interface IERC1155 is IERC1155Internal, IERC165 {
    /**
     * @notice query the balance of given token held by given address
     * @param account address to query
     * @param id token to query
     * @return token balance
     */
    function balanceOf(address account, uint256 id)
        external
        view
        returns (uint256);

    /**
     * @notice query the balances of given tokens held by given addresses
     * @param accounts addresss to query
     * @param ids tokens to query
     * @return token balances
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
        external
        view
        returns (uint256[] memory);

    /**
     * @notice query approval status of given operator with respect to given address
     * @param account address to query for approval granted
     * @param operator address to query for approval received
     * @return whether operator is approved to spend tokens held by account
     */
    function isApprovedForAll(address account, address operator)
        external
        view
        returns (bool);

    /**
     * @notice grant approval to or revoke approval from given operator to spend held tokens
     * @param operator address whose approval status to update
     * @param status whether operator should be considered approved
     */
    function setApprovalForAll(address operator, bool status) external;

    /**
     * @notice transfer tokens between given addresses, checking for ERC1155Receiver implementation if applicable
     * @param from sender of tokens
     * @param to receiver of tokens
     * @param id token ID
     * @param amount quantity of tokens to transfer
     * @param data data payload
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

    /**
     * @notice transfer batch of tokens between given addresses, checking for ERC1155Receiver implementation if applicable
     * @param from sender of tokens
     * @param to receiver of tokens
     * @param ids list of token IDs
     * @param amounts list of quantities of tokens to transfer
     * @param data data payload
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

File 29 of 41 : IERC1155Internal.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IERC165 } from '../../introspection/IERC165.sol';

/**
 * @title Partial ERC1155 interface needed by internal functions
 */
interface IERC1155Internal {
    event TransferSingle(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256 id,
        uint256 value
    );

    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    event ApprovalForAll(
        address indexed account,
        address indexed operator,
        bool approved
    );
}

File 30 of 41 : ERC1155MetadataStorage.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title ERC1155 metadata extensions
 */
library ERC1155MetadataStorage {
    bytes32 internal constant STORAGE_SLOT =
        keccak256('solidstate.contracts.storage.ERC1155Metadata');

    struct Layout {
        string baseURI;
        mapping(uint256 => string) tokenURIs;
    }

    function layout() internal pure returns (Layout storage l) {
        bytes32 slot = STORAGE_SLOT;
        assembly {
            l.slot := slot
        }
    }
}

File 31 of 41 : IERC1155Metadata.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IERC1155MetadataInternal } from './IERC1155MetadataInternal.sol';

/**
 * @title ERC1155Metadata interface
 */
interface IERC1155Metadata is IERC1155MetadataInternal {
    /**
     * @notice get generated URI for given token
     * @return token URI
     */
    function uri(uint256 tokenId) external view returns (string memory);
}

File 32 of 41 : IERC1155MetadataInternal.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title Partial ERC1155Metadata interface needed by internal functions
 */
interface IERC1155MetadataInternal {
    event URI(string value, uint256 indexed tokenId);
}

File 33 of 41 : AddressUtils.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { UintUtils } from './UintUtils.sol';

library AddressUtils {
    using UintUtils for uint256;

    function toString(address account) internal pure returns (string memory) {
        return uint256(uint160(account)).toHexString(20);
    }

    function isContract(address account) internal view returns (bool) {
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    function sendValue(address payable account, uint256 amount) internal {
        (bool success, ) = account.call{ value: amount }('');
        require(success, 'AddressUtils: failed to send value');
    }

    function functionCall(address target, bytes memory data)
        internal
        returns (bytes memory)
    {
        return
            functionCall(target, data, 'AddressUtils: failed low-level call');
    }

    function functionCall(
        address target,
        bytes memory data,
        string memory error
    ) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, error);
    }

    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return
            functionCallWithValue(
                target,
                data,
                value,
                'AddressUtils: failed low-level call with value'
            );
    }

    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory error
    ) internal returns (bytes memory) {
        require(
            address(this).balance >= value,
            'AddressUtils: insufficient balance for call'
        );
        return _functionCallWithValue(target, data, value, error);
    }

    function _functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory error
    ) private returns (bytes memory) {
        require(
            isContract(target),
            'AddressUtils: function call to non-contract'
        );

        (bool success, bytes memory returnData) = target.call{ value: value }(
            data
        );

        if (success) {
            return returnData;
        } else if (returnData.length > 0) {
            assembly {
                let returnData_size := mload(returnData)
                revert(add(32, returnData), returnData_size)
            }
        } else {
            revert(error);
        }
    }
}

File 34 of 41 : UintUtils.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title utility functions for uint256 operations
 * @dev derived from https://github.com/OpenZeppelin/openzeppelin-contracts/ (MIT license)
 */
library UintUtils {
    bytes16 private constant HEX_SYMBOLS = '0123456789abcdef';

    function toString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return '0';
        }

        uint256 temp = value;
        uint256 digits;

        while (temp != 0) {
            digits++;
            temp /= 10;
        }

        bytes memory buffer = new bytes(digits);

        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }

        return string(buffer);
    }

    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return '0x00';
        }

        uint256 length = 0;

        for (uint256 temp = value; temp != 0; temp >>= 8) {
            unchecked {
                length++;
            }
        }

        return toHexString(value, length);
    }

    function toHexString(uint256 value, uint256 length)
        internal
        pure
        returns (string memory)
    {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = '0';
        buffer[1] = 'x';

        unchecked {
            for (uint256 i = 2 * length + 1; i > 1; --i) {
                buffer[i] = HEX_SYMBOLS[value & 0xf];
                value >>= 4;
            }
        }

        require(value == 0, 'UintUtils: hex length insufficient');

        return string(buffer);
    }
}

File 35 of 41 : LandStorage.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { MintState, Zone } from "./LandTypes.sol";

library LandStorage {
	struct Layout {
		uint8 mintState;
		uint16 index; // current incremental index of zone id's
		uint64 price;
		address signer;
		address avatars;
		Zone avatarClaim; // zoneId is zero
		mapping(uint256 => address) claimedAvatars;
		mapping(uint16 => Zone) zones;
		mapping(address => bool) proxies;
	}

	bytes32 internal constant STORAGE_SLOT = keccak256("io.frogland.contracts.storage.LandStorage");

	function layout() internal pure returns (Layout storage l) {
		bytes32 slot = STORAGE_SLOT;
		// slither-disable-next-line timestamp
		// solhint-disable no-inline-assembly
		assembly {
			l.slot := slot
		}
	}

	// Adders

	function _addClaimCount(uint16 count) internal {
		layout().avatarClaim.count += count;
	}

	function _addCount(uint16 index, uint16 count) internal {
		Zone storage zone = _getZone(index);
		_addCount(zone, count);
	}

	function _addCount(Zone storage zone, uint16 count) internal {
		zone.count += count;
	}

	function _addInventory(Zone storage zone, uint16 count) internal {
		zone.max += count;
	}

	function _removeInventory(Zone storage zone, uint16 count) internal {
		zone.max -= count;
	}

	function _addZone(Zone memory zone) internal {
		uint16 index = _getIndex();
		index += 1;
		layout().zones[index] = zone;
		_setIndex(index);
	}

	// Getters

	function _getClaimedAvatar(uint256 tokenId) internal view returns (address) {
		return layout().claimedAvatars[tokenId];
	}

	function _getIndex() internal view returns (uint16 index) {
		return layout().index;
	}

	function _getPrice() internal view returns (uint64) {
		return layout().price;
	}

	function _getSigner() internal view returns (address) {
		return layout().signer;
	}

	function _getZone(uint16 index) internal view returns (Zone storage) {
		if (index == 0) {
			return layout().avatarClaim;
		}
		return layout().zones[index];
	}

	// Setters

	function _setAvatars(address avatars) internal {
		layout().avatars = avatars;
	}

	function _setClaimedAvatar(uint256 tokenId, address claimedBy) internal {
		layout().claimedAvatars[tokenId] = claimedBy;
	}

	function _setClaimedAvatars(uint256[] memory tokenIds, address claimedBy) internal {
		for (uint256 index = 0; index < tokenIds.length; index++) {
			uint256 tokenId = tokenIds[index];
			_setClaimedAvatar(tokenId, claimedBy);
		}
	}

	function _setIndex(uint16 index) internal {
		layout().index = index;
	}

	function _setInventory(Zone storage zone, uint16 maxCount) internal {
		zone.max = maxCount;
	}

	function _setPrice(uint64 price) internal {
		layout().price = price;
	}

	function _setProxy(address proxy, bool enabled) internal {
		layout().proxies[proxy] = enabled;
	}

	function _setSigner(address signer) internal {
		layout().signer = signer;
	}
}

File 36 of 41 : LandTypes.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// Enums

enum MintState {
	CLOSED,
	CLAIM,
	PRESALE,
	PUBLIC
}

// Init Args

struct LandInitArgs {
	address signer;
	address avatars;
	uint64 price;
	Zone avatarClaim;
	Zone[] zones;
}

// Structs

// waves for sale
// each tranche is mapped to a zone by Id
// except zone 0 which is the claim
// the first 10k are the claim
struct Zone {
	uint8 zoneId;
	uint16 count;
	uint16 max;
	uint24 startIndex;
	uint24 endIndex;
}

// requests

struct ClaimRequest {
	address to;
	uint64 deadline; // block.timestamp
	uint256[] tokenIds;
}

struct MintRequest {
	address to;
	uint64 deadline; // block.timestamp
	uint8 zoneId;
	uint16 count;
}

struct MintManyRequest {
	address to;
	uint64 deadline;
	uint16[] count; // array by zone index
}

File 37 of 41 : ERC2981Storage.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

struct RoyaltyInfo {
	address recipient;
	uint24 amount;
}

library ERC2981Storage {
	struct Layout {
		RoyaltyInfo royalties;
	}

	bytes32 internal constant STORAGE_SLOT =
		keccak256("IERC2981Royalties.contracts.storage.ERC2981Storage");

	function layout() internal pure returns (Layout storage l) {
		bytes32 slot = STORAGE_SLOT;
		// slither-disable-next-line timestamp
		// solhint-disable no-inline-assembly
		assembly {
			l.slot := slot
		}
	}
}

File 38 of 41 : IERC2981Royalties.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/// @title IERC2981Royalties
/// @dev Interface for the ERC2981 - Token Royalty standard
interface IERC2981Royalties {
	/// @notice 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 _value - 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 value sale price
	function royaltyInfo(uint256 _tokenId, uint256 _value)
		external
		view
		returns (address _receiver, uint256 _royaltyAmount);
}

File 39 of 41 : IOpenSeaCompatible.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

interface IOpenSeaCompatible {
	/**
	 * Get the contract metadata
	 */
	function contractURI() external view returns (string memory);
}

File 40 of 41 : OpenSeaCompatible.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

library OpenSeaCompatibleStorage {
	struct Layout {
		string contractURI;
	}

	bytes32 internal constant STORAGE_SLOT =
		keccak256("com.opensea.contracts.storage.OpenSeaCompatibleStorage");

	function layout() internal pure returns (Layout storage l) {
		bytes32 slot = STORAGE_SLOT;
		// slither-disable-next-line timestamp
		// solhint-disable no-inline-assembly
		assembly {
			l.slot := slot
		}
	}
}

abstract contract OpenSeaCompatibleInternal {
	function _setContractURI(string memory contractURI) internal virtual {
		OpenSeaCompatibleStorage.layout().contractURI = contractURI;
	}
}

abstract contract OpenSeaCompatible is OpenSeaCompatibleInternal, IOpenSeaCompatible {
	function contractURI() external view returns (string memory) {
		return OpenSeaCompatibleStorage.layout().contractURI;
	}
}

File 41 of 41 : OpenSeaProxyStorage.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

struct OpenSeaProxyInitArgs {
	address os721Proxy;
	address os1155Proxy;
}

library OpenSeaProxyStorage {
	struct Layout {
		address os721Proxy;
		address os1155Proxy;
	}

	bytes32 internal constant STORAGE_SLOT = keccak256("com.opensea.contracts.storage.proxy");

	function layout() internal pure returns (Layout storage l) {
		bytes32 slot = STORAGE_SLOT;
		assembly {
			l.slot := slot
		}
	}

	function _setProxies(OpenSeaProxyInitArgs memory init) internal {
		_setProxies(init.os721Proxy, init.os1155Proxy);
	}

	function _setProxies(address os721Proxy, address os1155Proxy) internal {
		layout().os721Proxy = os721Proxy;
		layout().os1155Proxy = os1155Proxy;
	}
}

Settings
{
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"enum IDiamondWritable.FacetCutAction","name":"action","type":"uint8"},{"internalType":"bytes4[]","name":"selectors","type":"bytes4[]"}],"indexed":false,"internalType":"struct IDiamondWritable.FacetCut[]","name":"facetCuts","type":"tuple[]"},{"indexed":false,"internalType":"address","name":"target","type":"address"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"DiamondCut","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"enum IDiamondWritable.FacetCutAction","name":"action","type":"uint8"},{"internalType":"bytes4[]","name":"selectors","type":"bytes4[]"}],"internalType":"struct IDiamondWritable.FacetCut[]","name":"facetCuts","type":"tuple[]"},{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"diamondCut","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"selector","type":"bytes4"}],"name":"facetAddress","outputs":[{"internalType":"address","name":"facet","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"facetAddresses","outputs":[{"internalType":"address[]","name":"addresses","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"facet","type":"address"}],"name":"facetFunctionSelectors","outputs":[{"internalType":"bytes4[]","name":"selectors","type":"bytes4[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"facets","outputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes4[]","name":"selectors","type":"bytes4[]"}],"internalType":"struct IDiamondReadable.Facet[]","name":"diamondFacets","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getFallbackAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nomineeOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"fallbackAddress","type":"address"}],"name":"setFallbackAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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*Hey, you there!*Are you constantly disappointed by paper land deeds for boring pixel lands? Do you want to be one of the cool kids and have your own NFT deed to metaverse land, but don't know where to start? Have you ever thought to yourself 'I wish I had an enigma mach...

Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.