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{
"language": "Solidity",
"sources": {
"FairXYZDeployer.sol": {
"content": "// SPDX-License-Identifier: MIT\n\n// @ Fair.xyz dev\n\npragma solidity 0.8.7;\n\nimport \"ERC721xyz.sol\";\nimport \"IFairXYZWallets.sol\";\nimport \"Pausable.sol\";\nimport \"ECDSA.sol\";\nimport \"Ownable.sol\";\n\ncontract FairXYZDeployer is ERC721xyz, Pausable, Ownable{\n \n using ECDSA for bytes32;\n\n // Collection Name and ticker\n string private _name;\n string private _symbol;\n\n \n // Max number of tokens on sale\n uint256 public maxTokens;\n \n // Price per NFT\n uint256 internal nftPrice;\n\n // URI information\n string private baseURI;\n string private pathURI;\n string public preRevealURI;\n string private _overrideURI;\n bool public lockURI;\n\n // Bool to allow signature-less minting\n bool public mintReleased;\n\n // Interface into FairXYZWallets\n address public interfaceAddress;\n\n bool public isBase;\n\n // Burnable token bool\n bool public burnable;\n\n // Maximum number of mints per wallet\n uint256 public maxMintsPerWallet;\n mapping(address => uint256) public mintsPerWallet;\n\n // Royalty information\n address internal _primaryRoyaltyReceiver; \n address internal _secondaryRoyaltyReceiver; \n uint96 internal _secondaryRoyaltyValue;\n\n // Hash storage\n mapping(bytes32 => bool) private usedHashes;\n\n event NewPriceSet(uint256 newSetPrice);\n event NewMaxMintsPerWalletSet(uint256 newMaxMints);\n event NewTokenRoyaltySet(uint256 newRoyalty);\n event NewRoyaltyPrimaryReceiver(address newPrimaryReceiver);\n event NewRoyaltySecondaryReceiver(address newSecondaryReceiver);\n event NewTokenURI(string newTokenURI);\n event NewPathURI(string newPathURI);\n\n constructor() payable ERC721xyz(_name, _symbol){\n isBase = true;\n _name = \"FairXYZ\";\n _symbol = \"FairXYZ\";\n _pause();\n renounceOwnership();\n }\n \n /**\n * @dev Return Collection Name\n */\n function name() override public view returns (string memory) {\n return _name;\n }\n\n /**\n * @dev Return Collection Ticker\n */\n function symbol() override public view returns (string memory) {\n return _symbol;\n }\n\n /**\n * @dev Return list of contract variables\n */\n function viewAllVariables() public view returns(uint256, uint256, string memory){\n return(nftPrice, maxMintsPerWallet, pathURI);\n }\n\n /**\n * @dev View signer wallet for minting and variable overrides\n */\n function viewSigner() public view returns(address){\n address returnSigner = IFairXYZWallets(interfaceAddress).viewSigner(); \n return(returnSigner);\n }\n\n /**\n * @dev Returns the wallet of Fair.xyz\n */\n function viewWithdraw() public view returns(address){\n address returnWithdraw = IFairXYZWallets(interfaceAddress).viewWithdraw(); \n return(returnWithdraw);\n }\n\n /**\n * @dev Initialise a new Creator contract using proxy\n */\n function initialize(uint256 maxTokens_, uint256 nftPrice_, string memory name_, string memory symbol_,\n bool burnable_, uint256 maxMintsPerWallet_, address interfaceAddress_,\n string[] memory URIs_, uint96 royaltyPercentage_, address[] memory royaltyReceivers) external {\n \n require( !isBase , \"This contract is not a base contract!\");\n require( interfaceAddress_ != address(0), \"Cannot set to 0 address!\");\n _transferOwnership(tx.origin);\n maxTokens = maxTokens_;\n nftPrice = nftPrice_;\n _name = name_;\n _symbol = symbol_;\n burnable = burnable_; \n maxMintsPerWallet = maxMintsPerWallet_;\n interfaceAddress = interfaceAddress_;\n preRevealURI = URIs_[0];\n baseURI = URIs_[1];\n pathURI = URIs_[2];\n isBase = true;\n _primaryRoyaltyReceiver = royaltyReceivers[0];\n _secondaryRoyaltyReceiver = royaltyReceivers[1];\n _secondaryRoyaltyValue = royaltyPercentage_;\n _setDefaultRoyalty(_secondaryRoyaltyReceiver, _secondaryRoyaltyValue);\n }\n\n /**\n * @dev Ensure number of minted tokens never goes above the sale limit\n */\n modifier saleIsOpen{\n require(_mintedTokens < maxTokens, \"Sale end\");\n _;\n }\n\n /**\n * @dev Lock the token metadata forever\n */\n function lockURIforever() external onlyOwner {\n lockURI = true;\n }\n \n /**\n * @dev View Token price\n */\n function price() external view returns (uint256) {\n return nftPrice; \n }\n\n /**\n * @dev Hash the variables to be modified\n */\n function hashVariableChanges(address sender, string memory newURI, string memory newPathURI, \n uint256 newPrice, uint256 newMaxMintsPerWallet, uint256 newRoyaltyPercentage) private pure returns(bytes32) \n {\n bytes32 hash = keccak256(abi.encodePacked(\n \"\\x19Ethereum Signed Message:\\n32\",\n keccak256(abi.encodePacked(sender, newURI, newPathURI, newPrice, newMaxMintsPerWallet, newRoyaltyPercentage)))\n ); \n return hash;\n }\n\n /**\n * @dev Override royalty receivers\n */\n function changeRoyaltyReceivers(address newPrimaryRoyaltyReceiver, address newSecondaryRoyaltyReceiver, uint96 newRoyaltyValue) \n external onlyOwner\n {\n bool requiresSecondaryChange; \n\n if(_primaryRoyaltyReceiver != newPrimaryRoyaltyReceiver)\n {\n _primaryRoyaltyReceiver = newPrimaryRoyaltyReceiver;\n\n emit NewRoyaltyPrimaryReceiver(_primaryRoyaltyReceiver);\n }\n\n if(_secondaryRoyaltyReceiver != newSecondaryRoyaltyReceiver)\n {\n _secondaryRoyaltyReceiver = newSecondaryRoyaltyReceiver;\n\n requiresSecondaryChange = true;\n \n emit NewRoyaltySecondaryReceiver(_secondaryRoyaltyReceiver);\n }\n\n if(newRoyaltyValue != _secondaryRoyaltyValue )\n {\n _secondaryRoyaltyValue = newRoyaltyValue;\n\n requiresSecondaryChange = true;\n \n emit NewTokenRoyaltySet(newRoyaltyValue);\n }\n\n if(requiresSecondaryChange)\n _setDefaultRoyalty(_secondaryRoyaltyReceiver, _secondaryRoyaltyValue);\n }\n \n \n /**\n * @dev Override contract variables\n */\n function overrideVariables(bytes memory signature, string memory newURI, string memory newPathURI, \n uint256 newPrice, uint256 newMaxMintsPerWallet, uint96 newRoyaltyPercentage)\n onlyOwner\n external\n {\n bytes32 messageHash = hashVariableChanges(msg.sender, newURI, newPathURI, \n newPrice, newMaxMintsPerWallet, newRoyaltyPercentage);\n address signAdd = viewSigner();\n require(messageHash.recover(signature) == signAdd, \"Unrecognizable Hash\");\n\n if(!lockURI)\n {\n if (bytes(newPathURI).length != 0) \n pathURI = newPathURI;\n emit NewPathURI(pathURI);\n\n if(bytes(newURI).length != 0)\n {\n _overrideURI = newURI;\n baseURI = \"\";\n emit NewTokenURI(_overrideURI);\n }\n }\n\n if(newPrice!=nftPrice)\n {\n nftPrice = newPrice;\n emit NewPriceSet(nftPrice);\n }\n\n if(newMaxMintsPerWallet!=maxMintsPerWallet)\n {\n maxMintsPerWallet = newMaxMintsPerWallet;\n emit NewMaxMintsPerWalletSet(maxMintsPerWallet);\n }\n\n if(newRoyaltyPercentage!=_secondaryRoyaltyValue)\n {\n _secondaryRoyaltyValue = newRoyaltyPercentage;\n _setDefaultRoyalty(_secondaryRoyaltyReceiver, _secondaryRoyaltyValue);\n emit NewTokenRoyaltySet(_secondaryRoyaltyValue);\n }\n\n }\n \n /**\n * @dev Return the Base URI\n */\n function _baseURI() public view override returns (string memory) {\n return baseURI;\n }\n\n /**\n * @dev Return the path URI - used for reveal experience\n */\n function _pathURI() public view override returns (string memory) {\n if(bytes(_overrideURI).length == 0)\n {\n return IFairXYZWallets(interfaceAddress).viewPathURI(pathURI);\n }\n else\n {\n return _overrideURI;\n }\n }\n\n /**\n * @dev Return the pre-reveal URI\n */\n function _preRevealURI() public view override returns (string memory) {\n return preRevealURI;\n }\n\n /**\n * @dev See the remaining mints for a wallet\n */\n function remainingMints(address minterAddress) public view returns(uint256) {\n \n if (maxMintsPerWallet == 0 ) {\n revert(\"Collection with no mint limit\");\n }\n \n uint256 mintsLeft = maxMintsPerWallet - mintsPerWallet[minterAddress];\n\n return mintsLeft; \n }\n \n /**\n * @dev Pause minting\n */\n function pause() external onlyOwner {\n _pause();\n }\n \n /**\n * @dev Unpause minting\n */\n function unpause() external onlyOwner {\n _unpause();\n }\n\n /**\n * @dev Burn a token\n */\n function burn(uint256 tokenId) external returns(uint256)\n {\n require(burnable, \"This contract does not allow burning\");\n require(msg.sender == ownerOf(tokenId), \"Burner is not the owner of token\");\n _burn(tokenId);\n return tokenId;\n }\n\n /**\n * @dev Airdrop tokens to a list of addresses\n */\n function airdrop(address[] memory address_, uint256 tokenCount) onlyOwner external returns(uint256) \n {\n require(_mintedTokens + address_.length * tokenCount <= maxTokens, \"This exceeds the maximum number of NFTs on sale!\");\n for(uint256 i = 0; i < address_.length; ) {\n _safeMint(address_[i], tokenCount);\n ++i;\n }\n return _mintedTokens;\n }\n\n /**\n * @dev Hash transaction data for minting\n */\n function hashTransaction(address sender, uint256 qty, uint256 nonce, uint256 phaseLimit, address address_) private pure returns(bytes32) \n {\n bytes32 hash = keccak256(abi.encodePacked(\n \"\\x19Ethereum Signed Message:\\n32\",\n keccak256(abi.encodePacked(sender, qty, nonce, phaseLimit, address_)))\n ); \n return hash;\n }\n\n /**\n * @dev Mint token(s)\n */\n function mint(bytes memory signature, uint256 nonce, uint256 numberOfTokens, uint256 phaseLimit)\n payable\n external\n whenNotPaused\n saleIsOpen\n returns (uint256)\n {\n bytes32 messageHash = hashTransaction(msg.sender, numberOfTokens, nonce, phaseLimit, address(this));\n address signAdd = viewSigner();\n require(_mintedTokens < phaseLimit, \"End of phase limit!\");\n require(phaseLimit <= maxTokens, \"Phase limit cannot be larger than max tokens\");\n require(messageHash.recover(signature) == signAdd, \"Unrecognizable Hash\");\n require(!usedHashes[messageHash], \"Reused Hash\");\n require(msg.value >= nftPrice * numberOfTokens, \"You have not sent the required amount of ETH\");\n require(numberOfTokens <= 20, \"Token minting limit per transaction exceeded\");\n require(block.number <= nonce + 20, \"Time limit has passed\");\n require(msg.sender == tx.origin, \"Cannot mint from contract\");\n\n usedHashes[messageHash] = true;\n\n uint256 origMintCount = numberOfTokens;\n\n // If trying to mint more tokens than available -> reimburse for excess mints and allow for lower mint count\n // to avoid a failed tx\n\n if(maxMintsPerWallet > 0)\n {\n require(mintsPerWallet[msg.sender] < maxMintsPerWallet, \"Exceeds number of mints per wallet\");\n \n if(mintsPerWallet[msg.sender] + numberOfTokens > maxMintsPerWallet)\n {\n numberOfTokens = maxMintsPerWallet - mintsPerWallet[msg.sender];\n } \n }\n \n if( (_mintedTokens + numberOfTokens > phaseLimit) )\n {\n numberOfTokens = phaseLimit - _mintedTokens;\n }\n \n uint256 reimbursementPrice = (origMintCount - numberOfTokens) * nftPrice;\n\n mintsPerWallet[msg.sender] += numberOfTokens;\n\n _mint(msg.sender, numberOfTokens);\n \n // cap reimbursement at msg.value in case something goes wrong\n if( 0 < reimbursementPrice && reimbursementPrice < msg.value)\n {\n (bool sent, ) = msg.sender.call{value: reimbursementPrice}(\"\");\n require(sent, \"Failed to send Ether\");\n }\n \n return _mintedTokens;\n }\n\n /**\n * @dev Release a mint so no signature is required\n */\n function releaseMint() onlyOwner external\n {\n require(!mintReleased);\n mintReleased = true;\n }\n\n /**\n * @dev Mint a token with no signature - requires mint release\n */\n function mintNoSignature(uint256 numberOfTokens)\n payable\n external\n whenNotPaused\n saleIsOpen\n returns (uint256)\n {\n require(mintReleased, \"Please use the mint function to buy your token\");\n require(msg.value >= nftPrice * numberOfTokens, \"You have not sent the required amount of ETH\");\n require(numberOfTokens <= 20, \"Token minting limit per transaction exceeded\");\n require(msg.sender == tx.origin, \"Cannot mint from contract\");\n\n uint256 origMintCount = numberOfTokens;\n\n // If trying to mint more tokens than available -> reimburse for excess mints and allow for lower mint count\n // to avoid a failed tx\n\n if(maxMintsPerWallet > 0)\n {\n require(mintsPerWallet[msg.sender] < maxMintsPerWallet, \"Exceeds number of mints per wallet\");\n \n if(mintsPerWallet[msg.sender] + numberOfTokens > maxMintsPerWallet)\n {\n numberOfTokens = maxMintsPerWallet - mintsPerWallet[msg.sender];\n } \n }\n \n if( (_mintedTokens + numberOfTokens > maxTokens) )\n {\n numberOfTokens = maxTokens - _mintedTokens;\n }\n\n uint256 reimbursementPrice = (origMintCount - numberOfTokens) * nftPrice;\n\n mintsPerWallet[msg.sender] += numberOfTokens;\n\n _mint(msg.sender, numberOfTokens);\n \n // cap reimbursement at msg.value in case something goes wrong\n if( 0 < reimbursementPrice && reimbursementPrice < msg.value)\n {\n (bool sent, ) = msg.sender.call{value: reimbursementPrice}(\"\");\n require(sent, \"Failed to send Ether\");\n }\n \n return _mintedTokens;\n }\n \n /**\n * @dev Only owner or Fair.xyz - withdraw contract balance to owner wallet. 6% primary sale fee to Fair.xyz\n */\n function withdraw()\n public\n payable\n {\n require(msg.sender == owner() || msg.sender == viewWithdraw(), \"Not owner or Fair.xyz!\");\n uint256 contractBalance = address(this).balance;\n\n (bool sent, ) = viewWithdraw().call{value: contractBalance*3/50}(\"\");\n require(sent, \"Failed to send Ether\");\n\n uint256 remainingContractBalance = address(this).balance;\n (bool sent_, ) = _primaryRoyaltyReceiver.call{value: remainingContractBalance}(\"\");\n require(sent_, \"Failed to send Ether\");\n }\n\n\n}"
},
"ERC721xyz.sol": {
"content": "// SPDX-License-Identifier: MIT\n\n// @ Fair.xyz dev\n\npragma solidity 0.8.7;\n\nimport \"IERC721.sol\";\nimport \"IERC721Receiver.sol\";\nimport \"IERC721Metadata.sol\";\nimport \"Address.sol\";\nimport \"Context.sol\";\nimport \"Strings.sol\";\nimport \"ERC165.sol\";\nimport \"ERC2981.sol\";\n\n/**\n * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including\n * the Metadata extension, with modifications by the Fair.xyz team, thus setting the ERC721xyz standard\n */\ncontract ERC721xyz is Context, ERC165, IERC721, ERC2981, IERC721Metadata {\n using Address for address;\n using Strings for uint256;\n\n // Token name\n string private _name;\n\n // Token symbol\n string private _symbol;\n\n // Token mint count\n uint256 public _mintedTokens;\n\n // Token burnt count\n uint256 internal _burntTokens;\n\n // Mapping from token ID to owner address\n mapping(uint256 => address) private _owners;\n\n // Mapping from token ID to original owner address\n mapping(uint256 => address) private _origOwners;\n\n // Burnt tokens\n mapping(uint256 => bool) private _burnedTokens;\n\n // Mapping owner address to token count\n mapping(address => uint256) private _balances;\n\n // Mapping from token ID to approved address\n mapping(uint256 => address) private _tokenApprovals;\n\n // Mapping from owner to operator approvals\n mapping(address => mapping(address => bool)) private _operatorApprovals;\n\n /**\n * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.\n */\n constructor(string memory name_, string memory symbol_) {\n _name = name_;\n _symbol = symbol_;\n }\n\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(bytes4 interfaceId) public view virtual override(ERC2981, ERC165, IERC165) returns (bool) {\n return\n interfaceId == type(IERC2981).interfaceId ||\n interfaceId == type(IERC721).interfaceId ||\n interfaceId == type(IERC721Metadata).interfaceId ||\n super.supportsInterface(interfaceId);\n }\n\n /**\n * @dev See {IERC721-balanceOf}.\n */\n function balanceOf(address owner) public view virtual override returns (uint256) {\n require(owner != address(0), \"ERC721: balance query for the zero address\");\n return _balances[owner];\n }\n\n /**\n * @dev Returns number of minted Tokens\n */\n function viewMinted() public view virtual returns(uint256) {\n return _mintedTokens;\n }\n\n // return all tokens\n function totalSupply() public view virtual returns(uint256) {\n return _mintedTokens - _burntTokens;\n }\n\n /**\n * @dev Mints a batch of `tokenIds` and transfers it to `to`.\n *\n * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible\n *\n * Requirements:\n *\n * - `to` cannot be the zero address.\n *\n * Emits {Transfer} events.\n */\n function _mint(address to, uint256 numberOfTokens) internal virtual {\n\n require(to != address(0), \"ERC721: mint to the zero address\");\n\n uint256 orig_count = _mintedTokens;\n \n _mintedTokens += numberOfTokens;\n\n _beforeTokenTransfer(address(0), to, _mintedTokens);\n\n _balances[to] += numberOfTokens;\n \n _origOwners[_mintedTokens] = to;\n\n uint256 loop_ = orig_count + numberOfTokens + 1; \n\n for (uint i = orig_count + 1; i < loop_ ; ) {\n emit Transfer(address(0), to, i);\n ++i;\n } \n\n _afterTokenTransfer(address(0), to, _mintedTokens);\n }\n\n /**\n * @dev Returns owner of token ID.\n */\n function ownerOf(uint256 tokenId) public view virtual override returns (address) {\n\n require(_exists(tokenId), \"ERC721xyz: Query for non existent token!\");\n \n uint256 counter = tokenId;\n \n if(_owners[tokenId] == address(0))\n {\n while (true) {\n \n address firstOwner = _origOwners[counter];\n if (firstOwner != address(0)) {\n return firstOwner;\n }\n ++counter;\n }\n } else {\n return _owners[tokenId];\n }\n }\n\n /**\n * @dev See {IERC721Metadata-name}.\n */\n function name() public view virtual override returns (string memory) {\n return _name;\n }\n\n /**\n * @dev See {IERC721Metadata-symbol}.\n */\n function symbol() public view virtual override returns (string memory) {\n return _symbol;\n }\n\n /**\n * @dev Combines path URI, base URI and pre-reveal URI for the full metadata journey on Fair.xyz\n */\n function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {\n require(_exists(tokenId), \"ERC721Metadata: URI query for nonexistent token\");\n\n string memory pathURI = _pathURI();\n string memory baseURI = _baseURI();\n string memory preRevealURI = _preRevealURI();\n \n if (bytes(pathURI).length == 0)\n {\n return preRevealURI; \n }\n else\n {\n return string(abi.encodePacked(pathURI, baseURI, tokenId.toString()));\n }\n }\n\n /**\n * @dev Base URI for computing {tokenURI}. If the pathURI is set, the resulting URI for each\n * token will be the concatenation of the `baseURI`, the `pathURI` and the `tokenId`. Empty\n * by default, can be overridden in child contracts.\n */\n function _baseURI() public view virtual returns (string memory) {\n return \"\";\n }\n\n /**\n * @dev FairXYZ - URI for computing {tokenURI}. If set, the resulting URI for each\n * token will be the concatenation of the `baseURI`, the `pathURI` and the `tokenId`. Empty\n * by default, can be overridden in child contracts.\n */\n function _pathURI() public view virtual returns (string memory) {\n return \"\";\n }\n\n /**\n * @dev FairXYZ - URI to be shown during pre-reveal of a collection\n */\n function _preRevealURI() public view virtual returns (string memory) {\n return \"\";\n }\n\n /**\n * @dev See {IERC721-approve}.\n */\n function approve(address to, uint256 tokenId) public virtual override {\n address owner = ERC721xyz.ownerOf(tokenId);\n require(to != owner, \"ERC721: approval to current owner\");\n\n require(\n _msgSender() == owner || isApprovedForAll(owner, _msgSender()),\n \"ERC721: approve caller is not owner nor approved for all\"\n );\n\n _approve(to, tokenId);\n }\n\n /**\n * @dev See {IERC721-getApproved}.\n */\n function getApproved(uint256 tokenId) public view virtual override returns (address) {\n require(_exists(tokenId), \"ERC721: approved query for nonexistent token\");\n\n return _tokenApprovals[tokenId];\n }\n\n /**\n * @dev See {IERC721-setApprovalForAll}.\n */\n function setApprovalForAll(address operator, bool approved) public virtual override {\n _setApprovalForAll(_msgSender(), operator, approved);\n }\n\n /**\n * @dev See {IERC721-isApprovedForAll}.\n */\n function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {\n return _operatorApprovals[owner][operator];\n }\n\n /**\n * @dev See {IERC721-transferFrom}.\n */\n function transferFrom(\n address from,\n address to,\n uint256 tokenId\n ) public virtual override {\n //solhint-disable-next-line max-line-length\n require(_isApprovedOrOwner(_msgSender(), tokenId), \"ERC721: transfer caller is not owner nor approved\");\n\n _transfer(from, to, tokenId);\n }\n\n /**\n * @dev See {IERC721-safeTransferFrom}.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId\n ) public virtual override {\n safeTransferFrom(from, to, tokenId, \"\");\n }\n\n /**\n * @dev See {IERC721-safeTransferFrom}.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId,\n bytes memory _data\n ) public virtual override {\n require(_isApprovedOrOwner(_msgSender(), tokenId), \"ERC721: transfer caller is not owner nor approved\");\n _safeTransfer(from, to, tokenId, _data);\n }\n\n /**\n * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n * are aware of the ERC721 protocol to prevent tokens from being forever locked.\n *\n * `_data` is additional data, it has no specified format and it is sent in call to `to`.\n *\n * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.\n * implement alternative mechanisms to perform token transfer, such as signature-based.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `tokenId` token must exist and be owned by `from`.\n * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n *\n * Emits a {Transfer} event.\n */\n function _safeTransfer(\n address from,\n address to,\n uint256 tokenId,\n bytes memory _data\n ) internal virtual {\n _transfer(from, to, tokenId);\n require(_checkOnERC721Received(from, to, tokenId, _data), \"ERC721: transfer to non ERC721Receiver implementer\");\n }\n\n /**\n * @dev Returns whether `tokenId` exists.\n *\n * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.\n *\n * Tokens start existing when they are minted (`_mint`),\n * and stop existing when they are burned (`_burn`).\n */\n function _exists(uint256 tokenId) internal view virtual returns (bool) {\n\n if(_burnedTokens[tokenId]) return false;\n\n return (0 < tokenId && tokenId <= _mintedTokens);\n }\n\n /**\n * @dev Returns whether `spender` is allowed to manage `tokenId`.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n */\n function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {\n require(_exists(tokenId), \"ERC721: operator query for nonexistent token\");\n address owner = ERC721xyz.ownerOf(tokenId);\n return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));\n }\n\n /**\n * @dev Safely mints `tokenId` and transfers it to `to`.\n *\n * Requirements:\n *\n * - `tokenId` must not exist.\n * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n *\n * Emits a {Transfer} event.\n */\n function _safeMint(address to, uint256 tokenCount) internal virtual {\n _safeMint(to, tokenCount, \"\");\n }\n\n /**\n * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is\n * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.\n */\n function _safeMint(\n address to,\n uint256 tokenCount,\n bytes memory _data\n ) internal virtual {\n _mint(to, tokenCount);\n require(\n _checkOnERC721Received(address(0), to, _mintedTokens, _data),\n \"ERC721: transfer to non ERC721Receiver implementer\"\n );\n }\n\n /**\n * @dev Destroys `tokenId`.\n * The approval is cleared when the token is burned.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n *\n * Emits a {Transfer} event.\n */\n function _burn(uint256 tokenId) internal virtual {\n require(_exists(tokenId), \"ERC721xyz: Query for nonexistent token!\");\n address owner = ERC721xyz.ownerOf(tokenId);\n\n _beforeTokenTransfer(owner, address(0), tokenId);\n\n // Clear approvals\n _approve(address(0), tokenId);\n\n _balances[owner] -= 1;\n _burnedTokens[tokenId] = true;\n _burntTokens += 1;\n\n emit Transfer(owner, address(0), tokenId);\n\n _afterTokenTransfer(owner, address(0), tokenId);\n }\n\n /**\n * @dev Transfers `tokenId` from `from` to `to`.\n * As opposed to {transferFrom}, this imposes no restrictions on msg.sender.\n *\n * Requirements:\n *\n * - `to` cannot be the zero address.\n * - `tokenId` token must be owned by `from`.\n *\n * Emits a {Transfer} event.\n */\n function _transfer(\n address from,\n address to,\n uint256 tokenId\n ) internal virtual {\n require(ERC721xyz.ownerOf(tokenId) == from, \"ERC721: transfer from incorrect owner\");\n require(to != address(0), \"ERC721: transfer to the zero address\");\n\n _beforeTokenTransfer(from, to, tokenId);\n\n // Clear approvals from the previous owner\n _approve(address(0), tokenId);\n\n _balances[from] -= 1;\n _balances[to] += 1;\n _owners[tokenId] = to;\n\n emit Transfer(from, to, tokenId);\n\n _afterTokenTransfer(from, to, tokenId);\n }\n\n /**\n * @dev Approve `to` to operate on `tokenId`\n *\n * Emits a {Approval} event.\n */\n function _approve(address to, uint256 tokenId) internal virtual {\n _tokenApprovals[tokenId] = to;\n emit Approval(ERC721xyz.ownerOf(tokenId), to, tokenId);\n }\n\n /**\n * @dev Approve `operator` to operate on all of `owner` tokens\n *\n * Emits a {ApprovalForAll} event.\n */\n function _setApprovalForAll(\n address owner,\n address operator,\n bool approved\n ) internal virtual {\n require(owner != operator, \"ERC721: approve to caller\");\n _operatorApprovals[owner][operator] = approved;\n emit ApprovalForAll(owner, operator, approved);\n }\n\n /**\n * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.\n * The call is not executed if the target address is not a contract.\n *\n * @param from address representing the previous owner of the given token ID\n * @param to target address that will receive the tokens\n * @param tokenId uint256 ID of the token to be transferred\n * @param _data bytes optional data to send along with the call\n * @return bool whether the call correctly returned the expected magic value\n */\n function _checkOnERC721Received(\n address from,\n address to,\n uint256 tokenId,\n bytes memory _data\n ) private returns (bool) {\n if (to.isContract()) {\n try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {\n return retval == IERC721Receiver.onERC721Received.selector;\n } catch (bytes memory reason) {\n if (reason.length == 0) {\n revert(\"ERC721: transfer to non ERC721Receiver implementer\");\n } else {\n assembly {\n revert(add(32, reason), mload(reason))\n }\n }\n }\n } else {\n return true;\n }\n }\n\n /**\n * @dev Hook that is called before any token transfer. This includes minting\n * and burning.\n *\n * Calling conditions:\n *\n * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be\n * transferred to `to`.\n * - When `from` is zero, `tokenId` will be minted for `to`.\n * - When `to` is zero, ``from``'s `tokenId` will be burned.\n * - `from` and `to` are never both zero.\n *\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n */\n function _beforeTokenTransfer(\n address from,\n address to,\n uint256 tokenId\n ) internal virtual {}\n\n /**\n * @dev Hook that is called after any transfer of tokens. This includes\n * minting and burning.\n *\n * Calling conditions:\n *\n * - when `from` and `to` are both non-zero.\n * - `from` and `to` are never both zero.\n *\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n */\n function _afterTokenTransfer(\n address from,\n address to,\n uint256 tokenId\n ) internal virtual {}\n}"
},
"IERC721.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol)\n\npragma solidity ^0.8.0;\n\nimport \"IERC165.sol\";\n\n/**\n * @dev Required interface of an ERC721 compliant contract.\n */\ninterface IERC721 is IERC165 {\n /**\n * @dev Emitted when `tokenId` token is transferred from `from` to `to`.\n */\n event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);\n\n /**\n * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.\n */\n event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);\n\n /**\n * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.\n */\n event ApprovalForAll(address indexed owner, address indexed operator, bool approved);\n\n /**\n * @dev Returns the number of tokens in ``owner``'s account.\n */\n function balanceOf(address owner) external view returns (uint256 balance);\n\n /**\n * @dev Returns the owner of the `tokenId` token.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n */\n function ownerOf(uint256 tokenId) external view returns (address owner);\n\n /**\n * @dev Safely transfers `tokenId` token from `from` to `to`.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `tokenId` token must exist and be owned by `from`.\n * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n *\n * Emits a {Transfer} event.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId,\n bytes calldata data\n ) external;\n\n /**\n * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n * are aware of the ERC721 protocol to prevent tokens from being forever locked.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `tokenId` token must exist and be owned by `from`.\n * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.\n * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n *\n * Emits a {Transfer} event.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId\n ) external;\n\n /**\n * @dev Transfers `tokenId` token from `from` to `to`.\n *\n * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `tokenId` token must be owned by `from`.\n * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address from,\n address to,\n uint256 tokenId\n ) external;\n\n /**\n * @dev Gives permission to `to` to transfer `tokenId` token to another account.\n * The approval is cleared when the token is transferred.\n *\n * Only a single account can be approved at a time, so approving the zero address clears previous approvals.\n *\n * Requirements:\n *\n * - The caller must own the token or be an approved operator.\n * - `tokenId` must exist.\n *\n * Emits an {Approval} event.\n */\n function approve(address to, uint256 tokenId) external;\n\n /**\n * @dev Approve or remove `operator` as an operator for the caller.\n * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.\n *\n * Requirements:\n *\n * - The `operator` cannot be the caller.\n *\n * Emits an {ApprovalForAll} event.\n */\n function setApprovalForAll(address operator, bool _approved) external;\n\n /**\n * @dev Returns the account approved for `tokenId` token.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n */\n function getApproved(uint256 tokenId) external view returns (address operator);\n\n /**\n * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.\n *\n * See {setApprovalForAll}\n */\n function isApprovedForAll(address owner, address operator) external view returns (bool);\n}\n"
},
"IERC165.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC165 standard, as defined in the\n * https://eips.ethereum.org/EIPS/eip-165[EIP].\n *\n * Implementers can declare support of contract interfaces, which can then be\n * queried by others ({ERC165Checker}).\n *\n * For an implementation, see {ERC165}.\n */\ninterface IERC165 {\n /**\n * @dev Returns true if this contract implements the interface defined by\n * `interfaceId`. See the corresponding\n * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\n * to learn more about how these ids are created.\n *\n * This function call must use less than 30 000 gas.\n */\n function supportsInterface(bytes4 interfaceId) external view returns (bool);\n}\n"
},
"IERC721Receiver.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @title ERC721 token receiver interface\n * @dev Interface for any contract that wants to support safeTransfers\n * from ERC721 asset contracts.\n */\ninterface IERC721Receiver {\n /**\n * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}\n * by `operator` from `from`, this function is called.\n *\n * It must return its Solidity selector to confirm the token transfer.\n * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.\n *\n * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.\n */\n function onERC721Received(\n address operator,\n address from,\n uint256 tokenId,\n bytes calldata data\n ) external returns (bytes4);\n}\n"
},
"IERC721Metadata.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)\n\npragma solidity ^0.8.0;\n\nimport \"IERC721.sol\";\n\n/**\n * @title ERC-721 Non-Fungible Token Standard, optional metadata extension\n * @dev See https://eips.ethereum.org/EIPS/eip-721\n */\ninterface IERC721Metadata is IERC721 {\n /**\n * @dev Returns the token collection name.\n */\n function name() external view returns (string memory);\n\n /**\n * @dev Returns the token collection symbol.\n */\n function symbol() external view returns (string memory);\n\n /**\n * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.\n */\n function tokenURI(uint256 tokenId) external view returns (string memory);\n}\n"
},
"Address.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length > 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance >= value, \"Address: insufficient balance for call\");\n require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(isContract(target), \"Address: delegate call to non-contract\");\n\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n // Look for revert reason and bubble it up if present\n if (returndata.length > 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n }\n}\n"
},
"Context.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n}\n"
},
"Strings.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n bytes16 private constant _HEX_SYMBOLS = \"0123456789abcdef\";\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` decimal representation.\n */\n function toString(uint256 value) internal pure returns (string memory) {\n // Inspired by OraclizeAPI's implementation - MIT licence\n // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol\n\n if (value == 0) {\n return \"0\";\n }\n uint256 temp = value;\n uint256 digits;\n while (temp != 0) {\n digits++;\n temp /= 10;\n }\n bytes memory buffer = new bytes(digits);\n while (value != 0) {\n digits -= 1;\n buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));\n value /= 10;\n }\n return string(buffer);\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\n */\n function toHexString(uint256 value) internal pure returns (string memory) {\n if (value == 0) {\n return \"0x00\";\n }\n uint256 temp = value;\n uint256 length = 0;\n while (temp != 0) {\n length++;\n temp >>= 8;\n }\n return toHexString(value, length);\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\n */\n function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\n bytes memory buffer = new bytes(2 * length + 2);\n buffer[0] = \"0\";\n buffer[1] = \"x\";\n for (uint256 i = 2 * length + 1; i > 1; --i) {\n buffer[i] = _HEX_SYMBOLS[value & 0xf];\n value >>= 4;\n }\n require(value == 0, \"Strings: hex length insufficient\");\n return string(buffer);\n }\n}\n"
},
"ERC165.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)\n\npragma solidity ^0.8.0;\n\nimport \"IERC165.sol\";\n\n/**\n * @dev Implementation of the {IERC165} interface.\n *\n * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check\n * for the additional interface id that will be supported. For example:\n *\n * ```solidity\n * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);\n * }\n * ```\n *\n * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.\n */\nabstract contract ERC165 is IERC165 {\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n return interfaceId == type(IERC165).interfaceId;\n }\n}\n"
},
"ERC2981.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/common/ERC2981.sol)\n\npragma solidity ^0.8.0;\n\nimport \"IERC2981.sol\";\nimport \"ERC165.sol\";\n\n/**\n * @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information.\n *\n * Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for\n * specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first.\n *\n * Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the\n * fee is specified in basis points by default.\n *\n * IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See\n * https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to\n * voluntarily pay royalties together with sales, but note that this standard is not yet widely supported.\n *\n * _Available since v4.5._\n */\nabstract contract ERC2981 is IERC2981, ERC165 {\n struct RoyaltyInfo {\n address receiver;\n uint96 royaltyFraction;\n }\n\n RoyaltyInfo private _defaultRoyaltyInfo;\n mapping(uint256 => RoyaltyInfo) private _tokenRoyaltyInfo;\n\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165) returns (bool) {\n return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId);\n }\n\n /**\n * @inheritdoc IERC2981\n */\n function royaltyInfo(uint256 _tokenId, uint256 _salePrice) public view virtual override returns (address, uint256) {\n RoyaltyInfo memory royalty = _tokenRoyaltyInfo[_tokenId];\n\n if (royalty.receiver == address(0)) {\n royalty = _defaultRoyaltyInfo;\n }\n\n uint256 royaltyAmount = (_salePrice * royalty.royaltyFraction) / _feeDenominator();\n\n return (royalty.receiver, royaltyAmount);\n }\n\n /**\n * @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a\n * fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an\n * override.\n */\n function _feeDenominator() internal pure virtual returns (uint96) {\n return 10000;\n }\n\n /**\n * @dev Sets the royalty information that all ids in this contract will default to.\n *\n * Requirements:\n *\n * - `receiver` cannot be the zero address.\n * - `feeNumerator` cannot be greater than the fee denominator.\n */\n function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual {\n require(feeNumerator <= _feeDenominator(), \"ERC2981: royalty fee will exceed salePrice\");\n require(receiver != address(0), \"ERC2981: invalid receiver\");\n\n _defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator);\n }\n\n /**\n * @dev Removes default royalty information.\n */\n function _deleteDefaultRoyalty() internal virtual {\n delete _defaultRoyaltyInfo;\n }\n\n /**\n * @dev Sets the royalty information for a specific token id, overriding the global default.\n *\n * Requirements:\n *\n * - `tokenId` must be already minted.\n * - `receiver` cannot be the zero address.\n * - `feeNumerator` cannot be greater than the fee denominator.\n */\n function _setTokenRoyalty(\n uint256 tokenId,\n address receiver,\n uint96 feeNumerator\n ) internal virtual {\n require(feeNumerator <= _feeDenominator(), \"ERC2981: royalty fee will exceed salePrice\");\n require(receiver != address(0), \"ERC2981: Invalid parameters\");\n\n _tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator);\n }\n\n /**\n * @dev Resets royalty information for the token id back to the global default.\n */\n function _resetTokenRoyalty(uint256 tokenId) internal virtual {\n delete _tokenRoyaltyInfo[tokenId];\n }\n}\n"
},
"IERC2981.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (interfaces/IERC2981.sol)\n\npragma solidity ^0.8.0;\n\nimport \"IERC165.sol\";\n\n/**\n * @dev Interface for the NFT Royalty Standard.\n *\n * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal\n * support for royalty payments across all NFT marketplaces and ecosystem participants.\n *\n * _Available since v4.5._\n */\ninterface IERC2981 is IERC165 {\n /**\n * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of\n * exchange. The royalty amount is denominated and should be paid in that same unit of exchange.\n */\n function royaltyInfo(uint256 tokenId, uint256 salePrice)\n external\n view\n returns (address receiver, uint256 royaltyAmount);\n}\n"
},
"IFairXYZWallets.sol": {
"content": "// SPDX-License-Identifier: MIT\n\n// @ Fair.xyz dev\n\npragma solidity 0.8.7;\n\ninterface IFairXYZWallets {\n function viewSigner() view external returns(address);\n function viewWithdraw() view external returns(address);\n function viewPathURI(string memory pathURI_) view external returns(string memory);\n}"
},
"Pausable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"Context.sol\";\n\n/**\n * @dev Contract module which allows children to implement an emergency stop\n * mechanism that can be triggered by an authorized account.\n *\n * This module is used through inheritance. It will make available the\n * modifiers `whenNotPaused` and `whenPaused`, which can be applied to\n * the functions of your contract. Note that they will not be pausable by\n * simply including this module, only once the modifiers are put in place.\n */\nabstract contract Pausable is Context {\n /**\n * @dev Emitted when the pause is triggered by `account`.\n */\n event Paused(address account);\n\n /**\n * @dev Emitted when the pause is lifted by `account`.\n */\n event Unpaused(address account);\n\n bool private _paused;\n\n /**\n * @dev Initializes the contract in unpaused state.\n */\n constructor() {\n _paused = false;\n }\n\n /**\n * @dev Returns true if the contract is paused, and false otherwise.\n */\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n /**\n * @dev Modifier to make a function callable only when the contract is not paused.\n *\n * Requirements:\n *\n * - The contract must not be paused.\n */\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n /**\n * @dev Modifier to make a function callable only when the contract is paused.\n *\n * Requirements:\n *\n * - The contract must be paused.\n */\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n /**\n * @dev Triggers stopped state.\n *\n * Requirements:\n *\n * - The contract must not be paused.\n */\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n /**\n * @dev Returns to normal state.\n *\n * Requirements:\n *\n * - The contract must be paused.\n */\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n}\n"
},
"ECDSA.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)\n\npragma solidity ^0.8.0;\n\nimport \"Strings.sol\";\n\n/**\n * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.\n *\n * These functions can be used to verify that a message was signed by the holder\n * of the private keys of a given address.\n */\nlibrary ECDSA {\n enum RecoverError {\n NoError,\n InvalidSignature,\n InvalidSignatureLength,\n InvalidSignatureS,\n InvalidSignatureV\n }\n\n function _throwError(RecoverError error) private pure {\n if (error == RecoverError.NoError) {\n return; // no error: do nothing\n } else if (error == RecoverError.InvalidSignature) {\n revert(\"ECDSA: invalid signature\");\n } else if (error == RecoverError.InvalidSignatureLength) {\n revert(\"ECDSA: invalid signature length\");\n } else if (error == RecoverError.InvalidSignatureS) {\n revert(\"ECDSA: invalid signature 's' value\");\n } else if (error == RecoverError.InvalidSignatureV) {\n revert(\"ECDSA: invalid signature 'v' value\");\n }\n }\n\n /**\n * @dev Returns the address that signed a hashed message (`hash`) with\n * `signature` or error string. This address can then be used for verification purposes.\n *\n * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n * this function rejects them by requiring the `s` value to be in the lower\n * half order, and the `v` value to be either 27 or 28.\n *\n * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n * verification to be secure: it is possible to craft signatures that\n * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n * this is by receiving a hash of the original message (which may otherwise\n * be too long), and then calling {toEthSignedMessageHash} on it.\n *\n * Documentation for signature generation:\n * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]\n * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]\n *\n * _Available since v4.3._\n */\n function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {\n // Check the signature length\n // - case 65: r,s,v signature (standard)\n // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._\n if (signature.length == 65) {\n bytes32 r;\n bytes32 s;\n uint8 v;\n // ecrecover takes the signature parameters, and the only way to get them\n // currently is to use assembly.\n assembly {\n r := mload(add(signature, 0x20))\n s := mload(add(signature, 0x40))\n v := byte(0, mload(add(signature, 0x60)))\n }\n return tryRecover(hash, v, r, s);\n } else if (signature.length == 64) {\n bytes32 r;\n bytes32 vs;\n // ecrecover takes the signature parameters, and the only way to get them\n // currently is to use assembly.\n assembly {\n r := mload(add(signature, 0x20))\n vs := mload(add(signature, 0x40))\n }\n return tryRecover(hash, r, vs);\n } else {\n return (address(0), RecoverError.InvalidSignatureLength);\n }\n }\n\n /**\n * @dev Returns the address that signed a hashed message (`hash`) with\n * `signature`. This address can then be used for verification purposes.\n *\n * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n * this function rejects them by requiring the `s` value to be in the lower\n * half order, and the `v` value to be either 27 or 28.\n *\n * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n * verification to be secure: it is possible to craft signatures that\n * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n * this is by receiving a hash of the original message (which may otherwise\n * be too long), and then calling {toEthSignedMessageHash} on it.\n */\n function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {\n (address recovered, RecoverError error) = tryRecover(hash, signature);\n _throwError(error);\n return recovered;\n }\n\n /**\n * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.\n *\n * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]\n *\n * _Available since v4.3._\n */\n function tryRecover(\n bytes32 hash,\n bytes32 r,\n bytes32 vs\n ) internal pure returns (address, RecoverError) {\n bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);\n uint8 v = uint8((uint256(vs) >> 255) + 27);\n return tryRecover(hash, v, r, s);\n }\n\n /**\n * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.\n *\n * _Available since v4.2._\n */\n function recover(\n bytes32 hash,\n bytes32 r,\n bytes32 vs\n ) internal pure returns (address) {\n (address recovered, RecoverError error) = tryRecover(hash, r, vs);\n _throwError(error);\n return recovered;\n }\n\n /**\n * @dev Overload of {ECDSA-tryRecover} that receives the `v`,\n * `r` and `s` signature fields separately.\n *\n * _Available since v4.3._\n */\n function tryRecover(\n bytes32 hash,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) internal pure returns (address, RecoverError) {\n // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature\n // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines\n // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most\n // signatures from current libraries generate a unique signature with an s-value in the lower half order.\n //\n // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value\n // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or\n // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept\n // these malleable signatures as well.\n if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {\n return (address(0), RecoverError.InvalidSignatureS);\n }\n if (v != 27 && v != 28) {\n return (address(0), RecoverError.InvalidSignatureV);\n }\n\n // If the signature is valid (and not malleable), return the signer address\n address signer = ecrecover(hash, v, r, s);\n if (signer == address(0)) {\n return (address(0), RecoverError.InvalidSignature);\n }\n\n return (signer, RecoverError.NoError);\n }\n\n /**\n * @dev Overload of {ECDSA-recover} that receives the `v`,\n * `r` and `s` signature fields separately.\n */\n function recover(\n bytes32 hash,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) internal pure returns (address) {\n (address recovered, RecoverError error) = tryRecover(hash, v, r, s);\n _throwError(error);\n return recovered;\n }\n\n /**\n * @dev Returns an Ethereum Signed Message, created from a `hash`. This\n * produces hash corresponding to the one signed with the\n * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n * JSON-RPC method as part of EIP-191.\n *\n * See {recover}.\n */\n function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {\n // 32 is the length in bytes of hash,\n // enforced by the type signature above\n return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n32\", hash));\n }\n\n /**\n * @dev Returns an Ethereum Signed Message, created from `s`. This\n * produces hash corresponding to the one signed with the\n * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n * JSON-RPC method as part of EIP-191.\n *\n * See {recover}.\n */\n function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {\n return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n\", Strings.toString(s.length), s));\n }\n\n /**\n * @dev Returns an Ethereum Signed Typed Data, created from a\n * `domainSeparator` and a `structHash`. This produces hash corresponding\n * to the one signed with the\n * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]\n * JSON-RPC method as part of EIP-712.\n *\n * See {recover}.\n */\n function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {\n return keccak256(abi.encodePacked(\"\\x19\\x01\", domainSeparator, structHash));\n }\n}\n"
},
"Ownable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"Context.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n constructor() {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions anymore. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby removing any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n}\n"
}
},
"settings": {
"evmVersion": "istanbul",
"optimizer": {
"enabled": true,
"runs": 200
},
"libraries": {
"FairXYZDeployer.sol": {}
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
}
}
} |