File size: 78,750 Bytes
f998fcd |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 |
{
"language": "Solidity",
"sources": {
"contracts/CryptoMason.sol": {
"content": "//SPDX-License-Identifier: MIT\r\n\r\npragma solidity ^0.8.13;\r\n\r\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\r\nimport \"./ERC721A.sol\";\r\n\r\ncontract CryptoMason is ERC721A, Ownable {\r\n string private baseTokenURI;\r\n\r\n uint256 public publicSalePrice;\r\n\r\n uint256 private totalNFTs;\r\n\r\n mapping(address => uint256) mintedNFTs;\r\n\r\n mapping(address => uint256) public NFTtracker;\r\n\r\n bool public isMintActive;\r\n bool public isStakeActive;\r\n\r\n mapping(address => address[]) public adrToAllRefs;\r\n mapping(address => address) public adrToParentRef;\r\n\r\n mapping(address => uint256) adrToCycle;\r\n\r\n uint256 internal refLevel1Percent;\r\n\r\n uint256 public NFTLimitPublic;\r\n\r\n uint256 public maxNFTs;\r\n\r\n event BaseURIChanged(string baseURI);\r\n\r\n event PublicSaleMint(address mintTo, uint256 tokensCount);\r\n\r\n event Received();\r\n\r\n address founderAddress;\r\n\r\n mapping(address => bool) registeredUsers;\r\n\r\n mapping(address => claim[]) claimInfo;\r\n mapping(address => uint256) public adrToClaimAmount;\r\n mapping(address => uint256) public adrToUsedClaimAmount;\r\n mapping(address => uint256[]) adrToIdsArray;\r\n mapping(address => uint256[]) adrToStakes;\r\n\r\n mapping(address => uint256) moneyFromAllRefs;\r\n mapping(address => refs[]) adrToRefsInfo;\r\n\r\n uint256 allMoneyForUsers;\r\n\r\n struct refs {\r\n address ref;\r\n uint256 money;\r\n uint256 date;\r\n }\r\n\r\n bool rewardAvailable;\r\n\r\n struct claim {\r\n address user;\r\n uint256 nftAmount;\r\n uint256 nftStartAmount;\r\n uint256[] nftIds;\r\n uint256 startTime;\r\n uint256 lockTime;\r\n uint256 percent;\r\n uint256 floor;\r\n uint256 rewardAmount;\r\n uint256 alreadyGiven;\r\n uint256 allowTime;\r\n }\r\n\r\n mapping(address => bool) isAdmin;\r\n address[] admins;\r\n\r\n constructor(\r\n string memory baseURI,\r\n address _founderAddress,\r\n uint256 maxNFT\r\n ) ERC721A(\"CryptoMason\", \"MASON\", 100, 9999) {\r\n baseTokenURI = baseURI;\r\n\r\n founderAddress = _founderAddress;\r\n\r\n NFTLimitPublic = 4;\r\n\r\n maxNFTs = maxNFT;\r\n publicSalePrice = 74000000000000000;\r\n\r\n refLevel1Percent = 20;\r\n\r\n registeredUsers[founderAddress] = true;\r\n adrToParentRef[founderAddress] = _founderAddress;\r\n }\r\n\r\n function setPrices(uint256 _newPublicSalePrice) public onlyOwner {\r\n publicSalePrice = _newPublicSalePrice;\r\n }\r\n\r\n function setNFTLimits(uint256 _newLimitPublic) public onlyOwner {\r\n NFTLimitPublic = _newLimitPublic;\r\n }\r\n\r\n function setNFTHardcap(uint256 _newMax) public onlyOwner {\r\n maxNFTs = _newMax;\r\n }\r\n\r\n function registerInSystem(address referal) external {\r\n require(\r\n registeredUsers[referal] == true,\r\n \"referal address is not registered\"\r\n );\r\n require(referal != msg.sender, \"You cannot be referal of yourself\");\r\n registeredUsers[msg.sender] = true;\r\n adrToParentRef[msg.sender] = referal;\r\n adrToAllRefs[referal].push(msg.sender);\r\n adrToRefsInfo[adrToParentRef[msg.sender]].push(refs(msg.sender, 0, 0));\r\n }\r\n\r\n function freeMint() external {\r\n require(registeredUsers[msg.sender], \"Not registered in system\");\r\n require(totalNFTs + 1 <= maxNFTs, \"Exceeded max NFTs amount\");\r\n\r\n require(isMintActive, \"mint is paused\");\r\n\r\n require(\r\n adrToCycle[msg.sender] > 9,\r\n \"Not enough nfts minted with your referal\"\r\n );\r\n\r\n totalNFTs += 1;\r\n\r\n mintedNFTs[msg.sender] += 1;\r\n\r\n NFTtracker[msg.sender] += 1;\r\n\r\n adrToCycle[msg.sender] -= 10;\r\n\r\n _safeMint(msg.sender, 1, true, \"\");\r\n }\r\n\r\n function PublicMint(uint256 quantity) external payable {\r\n require(registeredUsers[msg.sender], \"Not registered in system\");\r\n require(totalNFTs + quantity <= maxNFTs, \"Exceeded max NFTs amount\");\r\n require(isMintActive, \"mint is paused\");\r\n\r\n require(\r\n NFTtracker[msg.sender] + quantity <= NFTLimitPublic,\r\n \"Minting would exceed wallet limit\"\r\n );\r\n require(quantity > 0, \"Quantity has to be more than 0\");\r\n\r\n require(\r\n msg.value >= publicSalePrice * quantity,\r\n \"Fund amount is incorrect\"\r\n );\r\n\r\n _safeMint(msg.sender, quantity, true, \"\");\r\n\r\n totalNFTs += quantity;\r\n\r\n NFTtracker[msg.sender] += quantity;\r\n mintedNFTs[msg.sender] += quantity;\r\n\r\n uint256 money = msg.value;\r\n\r\n address par = adrToParentRef[msg.sender];\r\n\r\n uint256 mon = (refLevel1Percent * money) / 100;\r\n\r\n _widthdraw(par, mon);\r\n moneyFromAllRefs[par] += mon;\r\n\r\n bool found;\r\n uint256 place;\r\n for (uint256 i; i < adrToRefsInfo[par].length; i++) {\r\n if (adrToRefsInfo[par][i].ref == msg.sender) {\r\n found = true;\r\n place = i;\r\n break;\r\n }\r\n }\r\n if (found) {\r\n adrToRefsInfo[par][place].money += mon;\r\n adrToRefsInfo[par][place].date = block.timestamp;\r\n } else {\r\n adrToRefsInfo[par].push(refs(msg.sender, mon, block.timestamp));\r\n }\r\n\r\n money -= mon;\r\n\r\n _widthdraw(founderAddress, money);\r\n adrToCycle[par] += quantity;\r\n }\r\n\r\n function Airdrop(uint256 quantity, address wallet)\r\n external\r\n payable\r\n onlyOwner\r\n {\r\n require(totalNFTs + quantity <= maxNFTs, \"Exceeded max NFTs amount\");\r\n\r\n require(quantity <= 150, \"Exceeded max transaction amount\");\r\n\r\n _safeMint(wallet, quantity, true, \"\");\r\n\r\n totalNFTs += quantity;\r\n\r\n NFTtracker[wallet] += quantity;\r\n }\r\n\r\n function allowUser(\r\n uint256[] memory tokenIds,\r\n uint256 floor,\r\n uint256 time,\r\n uint256 perc,\r\n address user1\r\n ) external {\r\n require(\r\n msg.sender == owner() || isAdmin[msg.sender],\r\n \"Not enough rights\"\r\n );\r\n require(registeredUsers[user1], \"Not registered in system\");\r\n\r\n for (uint256 i; i < tokenIds.length; i++) {\r\n require(\r\n this.ownerOf(tokenIds[i]) == user1,\r\n \"This user is not owner of the nft\"\r\n );\r\n }\r\n\r\n uint256 divide = 1 days * 100;\r\n\r\n uint256 myReward = (floor * tokenIds.length * perc * time * 60) /\r\n divide;\r\n\r\n if (adrToClaimAmount[user1] == adrToUsedClaimAmount[user1]) {\r\n adrToClaimAmount[user1]++;\r\n\r\n claimInfo[user1].push(\r\n claim(\r\n user1,\r\n tokenIds.length,\r\n tokenIds.length,\r\n tokenIds,\r\n 0,\r\n time * 60,\r\n perc,\r\n floor,\r\n myReward,\r\n 0,\r\n block.timestamp\r\n )\r\n );\r\n allMoneyForUsers += myReward;\r\n } else {\r\n claimInfo[user1][claimInfo[user1].length - 1] = claim(\r\n user1,\r\n tokenIds.length,\r\n tokenIds.length,\r\n tokenIds,\r\n 0,\r\n time * 60,\r\n perc,\r\n floor,\r\n myReward,\r\n 0,\r\n block.timestamp\r\n );\r\n }\r\n }\r\n\r\n function stake() external {\r\n require(registeredUsers[msg.sender], \"Not registered in system\");\r\n require(isStakeActive, \"Stake is paused\");\r\n\r\n require(\r\n adrToUsedClaimAmount[msg.sender] < adrToClaimAmount[msg.sender],\r\n \"Don't have stakes\"\r\n );\r\n require(\r\n claimInfo[msg.sender][adrToUsedClaimAmount[msg.sender]].nftAmount >\r\n 0,\r\n \"Do not have stakes at all\"\r\n );\r\n require(\r\n block.timestamp <=\r\n claimInfo[msg.sender][adrToUsedClaimAmount[msg.sender]]\r\n .allowTime +\r\n 1 hours,\r\n \"Stake deadline is over\"\r\n );\r\n\r\n adrToStakes[msg.sender].push(adrToClaimAmount[msg.sender]);\r\n\r\n for (\r\n uint256 i;\r\n i <\r\n claimInfo[msg.sender][adrToUsedClaimAmount[msg.sender]]\r\n .nftIds\r\n .length;\r\n i++\r\n ) {\r\n require(\r\n ownerOf(\r\n claimInfo[msg.sender][adrToUsedClaimAmount[msg.sender]]\r\n .nftIds[i]\r\n ) == msg.sender,\r\n \"This user is not owner of the nft\"\r\n );\r\n\r\n safeTransferFrom(\r\n msg.sender,\r\n address(this),\r\n claimInfo[msg.sender][adrToUsedClaimAmount[msg.sender]].nftIds[\r\n i\r\n ]\r\n );\r\n adrToIdsArray[msg.sender].push(\r\n claimInfo[msg.sender][adrToUsedClaimAmount[msg.sender]].nftIds[\r\n i\r\n ]\r\n );\r\n }\r\n claimInfo[msg.sender][adrToUsedClaimAmount[msg.sender]]\r\n .startTime = block.timestamp;\r\n adrToUsedClaimAmount[msg.sender]++;\r\n }\r\n\r\n function checkReferals(address user, uint256 startPoint)\r\n external\r\n view\r\n returns (refs[] memory referalInfo)\r\n {\r\n uint256 amount = 8;\r\n\r\n require(startPoint % 8 == 0, \"startPoint must be 0, 8, 16 ... etc.\");\r\n require(startPoint < adrToRefsInfo[user].length, \"startPoint too big\");\r\n\r\n uint256 count;\r\n bool a;\r\n\r\n if (adrToRefsInfo[user].length < startPoint + amount) {\r\n uint256 newStartPoint = startPoint - (startPoint % 8);\r\n refs[] memory adrArray = new refs[](\r\n adrToRefsInfo[user].length - newStartPoint\r\n );\r\n for (\r\n uint256 i = newStartPoint;\r\n i < adrToRefsInfo[user].length;\r\n i++\r\n ) {\r\n if (adrToRefsInfo[user][i].ref != address(0)) {\r\n adrArray[count] = adrToRefsInfo[user][i];\r\n count++;\r\n }\r\n }\r\n return adrArray;\r\n } else {\r\n refs[] memory adrArray = new refs[](amount);\r\n for (uint256 i = startPoint; i < startPoint + amount; i++) {\r\n if (adrToRefsInfo[user][i].ref != address(0)) {\r\n adrArray[count] = adrToRefsInfo[user][i];\r\n count++;\r\n a = true;\r\n }\r\n }\r\n\r\n return adrArray;\r\n }\r\n }\r\n\r\n function checkUserStakings(address user)\r\n external\r\n view\r\n returns (\r\n uint256 totalRewards,\r\n uint256 _totalNFTs,\r\n uint256[] memory stakeNumbers,\r\n uint256[] memory stakeNotZero\r\n )\r\n {\r\n uint256 len = adrToStakes[user].length;\r\n uint256[] memory array = new uint256[](len);\r\n\r\n for (uint256 i; i < adrToStakes[user].length; i++) {\r\n if (checkMyRewards(user, adrToStakes[user][i]) != 0) {\r\n array[i] = adrToStakes[user][i];\r\n }\r\n }\r\n\r\n return (\r\n checkMyAllRewards(user),\r\n adrToIdsArray[user].length,\r\n adrToStakes[user],\r\n array\r\n );\r\n }\r\n\r\n function checkGeneralRefInfo(address user)\r\n external\r\n view\r\n returns (uint256 totalMoney, uint256 refAmount)\r\n {\r\n return (moneyFromAllRefs[user], adrToRefsInfo[user].length);\r\n }\r\n\r\n function checkClaimInfo(address user, uint256 claimNumber)\r\n external\r\n view\r\n returns (\r\n uint256[] memory tokenIds,\r\n uint256 floor,\r\n uint256 percent,\r\n uint256 startTime,\r\n uint256 timeAvailable\r\n )\r\n {\r\n return (\r\n claimInfo[user][claimNumber - 1].nftIds,\r\n claimInfo[user][claimNumber - 1].floor,\r\n claimInfo[user][claimNumber - 1].percent,\r\n claimInfo[user][claimNumber - 1].startTime,\r\n claimInfo[user][claimNumber - 1].startTime +\r\n claimInfo[user][claimNumber - 1].lockTime\r\n );\r\n }\r\n\r\n function batchUnstakeNFTs(uint256[] memory nfts) external {\r\n for (uint256 i; i < nfts.length; i++) {\r\n unStakeNFTs(nfts[i]);\r\n uint256 index = 0;\r\n for (\r\n uint256 l;\r\n l < claimInfo[msg.sender][nfts[i] - 1].nftIds.length;\r\n l++\r\n ) {\r\n for (uint256 j; j < adrToIdsArray[msg.sender].length; j++) {\r\n if (\r\n adrToIdsArray[msg.sender][j] ==\r\n claimInfo[msg.sender][nfts[i] - 1].nftIds[l]\r\n ) {\r\n index = j;\r\n }\r\n }\r\n removeNFTs(msg.sender, index);\r\n }\r\n }\r\n }\r\n\r\n function unStakeNFTs(uint256 numberClaim) internal {\r\n require(numberClaim != 0, \"Not correct number\");\r\n numberClaim -= 1;\r\n require(registeredUsers[msg.sender], \"Not registered in system\");\r\n require(\r\n claimInfo[msg.sender][numberClaim].startTime +\r\n claimInfo[msg.sender][numberClaim].lockTime <\r\n block.timestamp,\r\n \"Wait for ending of your deadline\"\r\n );\r\n\r\n for (\r\n uint256 i;\r\n i < claimInfo[msg.sender][numberClaim].nftIds.length;\r\n i++\r\n ) {\r\n this.safeTransferFrom(\r\n address(this),\r\n msg.sender,\r\n claimInfo[msg.sender][numberClaim].nftIds[i]\r\n );\r\n }\r\n\r\n claimInfo[msg.sender][numberClaim].nftAmount == 0;\r\n if (claimInfo[msg.sender][numberClaim].rewardAmount == 0) {\r\n uint256 index = 0;\r\n for (uint256 j; j < adrToStakes[msg.sender].length; j++) {\r\n if (adrToStakes[msg.sender][j] == numberClaim) {\r\n index = j;\r\n }\r\n }\r\n removeStakes(msg.sender, index);\r\n }\r\n }\r\n\r\n function addAdmin(address user) external onlyOwner {\r\n require(!isAdmin[user], \"Already admin\");\r\n isAdmin[user] = true;\r\n admins.push(user);\r\n }\r\n\r\n function deleteAdmin(address user) external onlyOwner {\r\n require(isAdmin[user], \"Not admin\");\r\n for (uint256 i; i < admins.length; i++) {\r\n if (admins[i] == user) {\r\n removeAdmin(i);\r\n }\r\n }\r\n }\r\n\r\n function removeAdmin(uint256 index) internal returns (address[] memory) {\r\n for (uint256 i = index; i < admins.length - 1; i++) {\r\n admins[i] = admins[i + 1];\r\n }\r\n delete admins[admins.length - 1];\r\n admins.pop();\r\n return admins;\r\n }\r\n\r\n function removeNFTs(address user, uint256 index)\r\n internal\r\n returns (uint256[] memory)\r\n {\r\n for (uint256 i = index; i < adrToIdsArray[user].length - 1; i++) {\r\n adrToIdsArray[user][i] = adrToIdsArray[user][i + 1];\r\n }\r\n delete adrToIdsArray[user][adrToIdsArray[user].length - 1];\r\n adrToIdsArray[user].pop();\r\n return adrToIdsArray[user];\r\n }\r\n\r\n function removeStakes(address user, uint256 index)\r\n internal\r\n returns (uint256[] memory)\r\n {\r\n for (uint256 i = index; i < adrToStakes[user].length - 1; i++) {\r\n adrToStakes[user][i] = adrToStakes[user][i + 1];\r\n }\r\n delete adrToStakes[user][adrToStakes[user].length - 1];\r\n adrToStakes[user].pop();\r\n return adrToStakes[user];\r\n }\r\n\r\n function checkAllAdmins()\r\n external\r\n view\r\n onlyOwner\r\n returns (address[] memory)\r\n {\r\n return admins;\r\n }\r\n\r\n function setRewardAmount() external payable onlyOwner {\r\n rewardAvailable = true;\r\n }\r\n\r\n function getRewardsAndNFTs(uint256[] memory numberClaim) external {\r\n for (uint256 i; i < numberClaim.length; i++) {\r\n getRewards(numberClaim[i]);\r\n unStakeNFTs(numberClaim[i]);\r\n }\r\n }\r\n\r\n function batchRewards(uint256[] memory stakeNumbers) external {\r\n for (uint256 i; i < stakeNumbers.length; i++) {\r\n getRewards(stakeNumbers[i]);\r\n }\r\n }\r\n\r\n function getRewards(uint256 numberClaim) internal {\r\n require(numberClaim != 0, \"Not correct number\");\r\n numberClaim -= 1;\r\n require(registeredUsers[msg.sender], \"Not registered in system\");\r\n\r\n require(rewardAvailable, \"Admin didn't set rewardSumm yet\");\r\n\r\n require(\r\n adrToUsedClaimAmount[msg.sender] <= adrToClaimAmount[msg.sender],\r\n \"Don't have stakes\"\r\n );\r\n require(\r\n claimInfo[msg.sender][numberClaim].startTime > 0,\r\n \"Stake at first\"\r\n );\r\n require(\r\n claimInfo[msg.sender][numberClaim].rewardAmount > 0,\r\n \"Dont have rewards\"\r\n );\r\n\r\n uint256 nows = block.timestamp;\r\n uint256 myReward;\r\n bool a;\r\n\r\n if (\r\n claimInfo[msg.sender][numberClaim].startTime +\r\n claimInfo[msg.sender][numberClaim].lockTime <\r\n nows\r\n ) {\r\n myReward = claimInfo[msg.sender][numberClaim].rewardAmount;\r\n claimInfo[msg.sender][numberClaim].rewardAmount -= myReward;\r\n a = true;\r\n } else {\r\n uint256 divide = 1 days * 100;\r\n\r\n myReward =\r\n (claimInfo[msg.sender][numberClaim].floor *\r\n claimInfo[msg.sender][numberClaim].nftStartAmount *\r\n claimInfo[msg.sender][numberClaim].percent *\r\n (block.timestamp -\r\n claimInfo[msg.sender][numberClaim].startTime)) /\r\n divide -\r\n claimInfo[msg.sender][numberClaim].alreadyGiven;\r\n\r\n claimInfo[msg.sender][numberClaim].rewardAmount -= myReward;\r\n }\r\n claimInfo[msg.sender][numberClaim].alreadyGiven += myReward;\r\n\r\n allMoneyForUsers -= myReward;\r\n\r\n (bool success, ) = payable(msg.sender).call{value: myReward}(\"\");\r\n\r\n require(success, \"Transfer failed\");\r\n if (a) {\r\n claimInfo[msg.sender][numberClaim].rewardAmount = 0;\r\n }\r\n }\r\n\r\n function changeStakePauseStatus() external onlyOwner {\r\n isStakeActive = !isStakeActive;\r\n }\r\n\r\n function changeMintPauseStatus() external onlyOwner {\r\n isMintActive = !isMintActive;\r\n }\r\n\r\n function _baseURI() internal view virtual override returns (string memory) {\r\n return baseTokenURI;\r\n }\r\n\r\n function checkMyRewards(address user, uint256 numberClaim)\r\n public\r\n view\r\n returns (uint256)\r\n {\r\n require(numberClaim != 0, \"Not correct number\");\r\n numberClaim -= 1;\r\n require(registeredUsers[user], \"Not registered in system\");\r\n uint256 nows = block.timestamp;\r\n uint256 myReward;\r\n if (numberClaim + 1 <= adrToUsedClaimAmount[user]) {\r\n if (\r\n claimInfo[user][numberClaim].startTime +\r\n claimInfo[user][numberClaim].lockTime <\r\n nows\r\n ) {\r\n myReward = claimInfo[user][numberClaim].rewardAmount;\r\n } else {\r\n uint256 divide = 1 days * 100;\r\n\r\n myReward =\r\n (claimInfo[user][numberClaim].floor *\r\n claimInfo[user][numberClaim].nftStartAmount *\r\n claimInfo[user][numberClaim].percent *\r\n (block.timestamp -\r\n claimInfo[user][numberClaim].startTime)) /\r\n divide -\r\n claimInfo[user][numberClaim].alreadyGiven;\r\n }\r\n return myReward;\r\n } else {\r\n return 0;\r\n }\r\n }\r\n\r\n function checkMyAllRewards(address user) public view returns (uint256) {\r\n uint256 sum;\r\n for (uint256 i; i < adrToStakes[user].length; i++) {\r\n sum += checkMyRewards(user, adrToStakes[user][i]);\r\n }\r\n return sum;\r\n }\r\n\r\n function userNFTIds(address _owner) public view returns (uint256[] memory) {\r\n uint256 ownerTokenCount = balanceOf(_owner);\r\n uint256[] memory tokenIds = new uint256[](ownerTokenCount);\r\n for (uint256 i; i < ownerTokenCount; i++) {\r\n tokenIds[i] = tokenOfOwnerByIndex(_owner, i);\r\n }\r\n return tokenIds;\r\n }\r\n\r\n function checkReferalPercents() external view returns (uint256 level1) {\r\n return (refLevel1Percent);\r\n }\r\n\r\n function checkAllMoneyForAllUsers() external view returns (uint256) {\r\n return allMoneyForUsers;\r\n }\r\n\r\n function tokenURI(uint256 tokenId)\r\n public\r\n view\r\n override(ERC721A)\r\n returns (string memory)\r\n {\r\n string memory _tokenURI = super.tokenURI(tokenId);\r\n\r\n return string(abi.encodePacked(_tokenURI, \".json\"));\r\n }\r\n\r\n function setBaseURI(string memory baseURI) public onlyOwner {\r\n baseTokenURI = baseURI;\r\n\r\n emit BaseURIChanged(baseURI);\r\n }\r\n\r\n function isRegistered(address user) external view returns (bool) {\r\n return registeredUsers[user];\r\n }\r\n\r\n function isMinted(address user) external view returns (bool) {\r\n if (mintedNFTs[user] > 0) {\r\n return true;\r\n }\r\n return false;\r\n }\r\n\r\n function withdrawAll() public onlyOwner {\r\n uint256 balance = address(this).balance;\r\n\r\n require(balance > 0, \"Insufficent balance\");\r\n\r\n _widthdraw(founderAddress, balance);\r\n }\r\n\r\n function _widthdraw(address _address, uint256 _amount) private {\r\n (bool success, ) = _address.call{value: _amount}(\"\");\r\n\r\n require(success, \"Failed to widthdraw Ether\");\r\n }\r\n\r\n function changeFounderAddress(address adr) external onlyOwner {\r\n founderAddress = adr;\r\n }\r\n\r\n function onERC721Received(\r\n address _operator,\r\n address _from,\r\n uint256 _tokenId,\r\n bytes calldata _data\r\n ) external returns (bytes4) {\r\n _operator;\r\n _from;\r\n _tokenId;\r\n _data;\r\n emit Received();\r\n return 0x150b7a02;\r\n }\r\n}\r\n"
},
"contracts/ERC721A.sol": {
"content": "//SPDX-License-Identifier: UNLICENSED\r\n\r\npragma solidity ^0.8.4;\r\n\r\nimport \"@openzeppelin/contracts/utils/Context.sol\";\r\nimport \"@openzeppelin/contracts/utils/introspection/ERC165.sol\";\r\nimport \"@openzeppelin/contracts/token/ERC721/IERC721.sol\";\r\nimport \"@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol\";\r\nimport \"@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol\";\r\nimport \"@openzeppelin/contracts/utils/Address.sol\";\r\nimport \"@openzeppelin/contracts/utils/Strings.sol\";\r\nimport \"@openzeppelin/contracts/utils/math/SafeMath.sol\";\r\nimport \"@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol\";\r\n\r\ncontract ERC721A is\r\n Context,\r\n ERC165,\r\n IERC721,\r\n IERC721Metadata,\r\n IERC721Enumerable\r\n{\r\n using Address for address;\r\n using Strings for uint256;\r\n\r\n struct TokenOwnership {\r\n address addr;\r\n uint64 startTimestamp;\r\n }\r\n\r\n struct AddressData {\r\n uint128 balance;\r\n uint128 numberMinted;\r\n }\r\n\r\n mapping(uint256 => bool) burned;\r\n uint256 burnedCount;\r\n\r\n uint256 private currentIndex;\r\n\r\n uint256 public immutable collectionSize;\r\n uint256 public maxBatchSize;\r\n\r\n // Token name\r\n string private _name;\r\n\r\n // Token symbol\r\n string private _symbol;\r\n\r\n // Mapping from token ID to ownership details\r\n // An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.\r\n mapping(uint256 => TokenOwnership) private _ownerships;\r\n\r\n // Mapping owner address to address data\r\n mapping(address => AddressData) private _addressData;\r\n\r\n // Mapping from token ID to approved address\r\n mapping(uint256 => address) private _tokenApprovals;\r\n\r\n // Mapping from owner to operator approvals\r\n mapping(address => mapping(address => bool)) private _operatorApprovals;\r\n\r\n /**\r\n * @dev\r\n * maxBatchSize refers to how much a minter can mint at a time.\r\n * collectionSize_ refers to how many tokens are in the collection.\r\n */\r\n constructor(\r\n string memory name_,\r\n string memory symbol_,\r\n uint256 maxBatchSize_,\r\n uint256 collectionSize_\r\n ) {\r\n require(\r\n collectionSize_ > 0,\r\n \"ERC721A: collection must have a nonzero supply\"\r\n );\r\n require(maxBatchSize_ > 0, \"ERC721A: max batch size must be nonzero\");\r\n _name = name_;\r\n _symbol = symbol_;\r\n maxBatchSize = maxBatchSize_;\r\n collectionSize = collectionSize_;\r\n currentIndex = _startTokenId();\r\n }\r\n\r\n /**\r\n * To change the starting tokenId, please override this function.\r\n */\r\n function _startTokenId() internal view virtual returns (uint256) {\r\n return 0;\r\n }\r\n\r\n /**\r\n * @dev See {IERC721Enumerable-totalSupply}.\r\n */\r\n function totalSupply() public view override returns (uint256) {\r\n return _totalMinted() - burnedCount;\r\n }\r\n\r\n function currentTokenId() public view returns (uint256) {\r\n return _totalMinted();\r\n }\r\n\r\n function getNextTokenId() public view returns (uint256) {\r\n return SafeMath.add(_totalMinted(), 1);\r\n }\r\n\r\n /**\r\n * Returns the total amount of tokens minted in the contract.\r\n */\r\n function _totalMinted() internal view returns (uint256) {\r\n unchecked {\r\n return currentIndex - _startTokenId();\r\n }\r\n }\r\n\r\n /**\r\n * @dev See {IERC721Enumerable-tokenByIndex}.\r\n */\r\n function tokenByIndex(uint256 index)\r\n public\r\n view\r\n override\r\n returns (uint256)\r\n {\r\n require(index < totalSupply(), \"ERC721A: global index out of bounds\");\r\n return index;\r\n }\r\n\r\n /**\r\n * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.\r\n * This read function is O(collectionSize). If calling from a separate contract, be sure to test gas first.\r\n * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.\r\n */\r\n function tokenOfOwnerByIndex(address owner, uint256 index)\r\n public\r\n view\r\n override\r\n returns (uint256)\r\n {\r\n require(index < balanceOf(owner), \"ERC721A: owner index out of bounds\");\r\n uint256 numMintedSoFar = totalSupply();\r\n uint256 tokenIdsIdx = 0;\r\n address currOwnershipAddr = address(0);\r\n for (uint256 i = 0; i < numMintedSoFar; i++) {\r\n TokenOwnership memory ownership = _ownerships[i];\r\n if (ownership.addr != address(0)) {\r\n currOwnershipAddr = ownership.addr;\r\n }\r\n if (currOwnershipAddr == owner) {\r\n if (tokenIdsIdx == index) {\r\n return i;\r\n }\r\n tokenIdsIdx++;\r\n }\r\n }\r\n revert(\"ERC721A: unable to get token of owner by index\");\r\n }\r\n\r\n /**\r\n * @dev See {IERC165-supportsInterface}.\r\n */\r\n function supportsInterface(bytes4 interfaceId)\r\n public\r\n view\r\n virtual\r\n override(ERC165, IERC165)\r\n returns (bool)\r\n {\r\n return\r\n interfaceId == type(IERC721).interfaceId ||\r\n interfaceId == type(IERC721Metadata).interfaceId ||\r\n interfaceId == type(IERC721Enumerable).interfaceId ||\r\n super.supportsInterface(interfaceId);\r\n }\r\n\r\n /**\r\n * @dev See {IERC721-balanceOf}.\r\n */\r\n function balanceOf(address owner) public view override returns (uint256) {\r\n require(\r\n owner != address(0),\r\n \"ERC721A: balance query for the zero address\"\r\n );\r\n return uint256(_addressData[owner].balance);\r\n }\r\n\r\n function _numberMinted(address owner) internal view returns (uint256) {\r\n require(\r\n owner != address(0),\r\n \"ERC721A: number minted query for the zero address\"\r\n );\r\n return uint256(_addressData[owner].numberMinted);\r\n }\r\n\r\n function ownershipOf(uint256 tokenId)\r\n internal\r\n view\r\n returns (TokenOwnership memory)\r\n {\r\n uint256 curr = tokenId;\r\n\r\n unchecked {\r\n if (_startTokenId() <= curr && curr < currentIndex) {\r\n TokenOwnership memory ownership = _ownerships[curr];\r\n if (true) {\r\n return ownership;\r\n }\r\n\r\n // Invariant:\r\n // There will always be an ownership that has an address and is not burned\r\n // before an ownership that does not have an address and is not burned.\r\n // Hence, curr will not underflow.\r\n while (true) {\r\n curr--;\r\n ownership = _ownerships[curr];\r\n if (ownership.addr != address(0)) {\r\n return ownership;\r\n }\r\n }\r\n }\r\n }\r\n\r\n revert(\"ERC721A: unable to determine the owner of token\");\r\n }\r\n\r\n /**\r\n * @dev See {IERC721-ownerOf}.\r\n */\r\n function ownerOf(uint256 tokenId) public view override returns (address) {\r\n return ownershipOf(tokenId).addr;\r\n }\r\n\r\n /**\r\n * @dev See {IERC721Metadata-name}.\r\n */\r\n function name() public view virtual override returns (string memory) {\r\n return _name;\r\n }\r\n\r\n /**\r\n * @dev See {IERC721Metadata-symbol}.\r\n */\r\n function symbol() public view virtual override returns (string memory) {\r\n return _symbol;\r\n }\r\n\r\n /**\r\n * @dev See {IERC721Metadata-tokenURI}.\r\n */\r\n function tokenURI(uint256 tokenId)\r\n public\r\n view\r\n virtual\r\n override\r\n returns (string memory)\r\n {\r\n string memory baseURI = _baseURI();\r\n return\r\n bytes(baseURI).length > 0\r\n ? string(abi.encodePacked(baseURI, tokenId.toString()))\r\n : \"\";\r\n }\r\n\r\n /**\r\n * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each\r\n * token will be the concatenation of the baseURI and the tokenId. Empty\r\n * by default, can be overriden in child contracts.\r\n */\r\n function _baseURI() internal view virtual returns (string memory) {\r\n return \"\";\r\n }\r\n\r\n /**\r\n * @dev See {IERC721-approve}.\r\n */\r\n function approve(address to, uint256 tokenId) public override {\r\n address owner = ERC721A.ownerOf(tokenId);\r\n require(to != owner, \"ERC721A: approval to current owner\");\r\n\r\n require(\r\n _msgSender() == owner || isApprovedForAll(owner, _msgSender()),\r\n \"ERC721A: approve caller is not owner nor approved for all\"\r\n );\r\n\r\n _approve(to, tokenId, owner);\r\n }\r\n\r\n function batchApprove(address to, uint256[] memory tokenIds) public {\r\n for (uint256 i; i < tokenIds.length; i++) {\r\n address owner = ERC721A.ownerOf(tokenIds[i]);\r\n require(to != owner, \"ERC721A: approval to current owner\");\r\n\r\n require(\r\n _msgSender() == owner || isApprovedForAll(owner, _msgSender()),\r\n \"ERC721A: approve caller is not owner nor approved for all\"\r\n );\r\n\r\n _approve(to, tokenIds[i], owner);\r\n }\r\n }\r\n\r\n /**\r\n * @dev See {IERC721-getApproved}.\r\n */\r\n function getApproved(uint256 tokenId)\r\n public\r\n view\r\n override\r\n returns (address)\r\n {\r\n require(\r\n _exists(tokenId),\r\n \"ERC721A: approved query for nonexistent token\"\r\n );\r\n\r\n return _tokenApprovals[tokenId];\r\n }\r\n\r\n /**\r\n * @dev See {IERC721-setApprovalForAll}.\r\n */\r\n function setApprovalForAll(address operator, bool approved)\r\n public\r\n override\r\n {\r\n require(operator != _msgSender(), \"ERC721A: approve to caller\");\r\n\r\n _operatorApprovals[_msgSender()][operator] = approved;\r\n emit ApprovalForAll(_msgSender(), operator, approved);\r\n }\r\n\r\n function _burn(uint256 tokenId) public {\r\n require(msg.sender == ownerOf(tokenId), \"it's not owner\");\r\n setApprovalForAll(address(this), true);\r\n transferFrom(ownerOf(tokenId), address(0), tokenId);\r\n burnedCount++;\r\n burned[tokenId] = true;\r\n }\r\n\r\n /**\r\n * @dev See {IERC721-isApprovedForAll}.\r\n */\r\n function isApprovedForAll(address owner, address operator)\r\n public\r\n view\r\n virtual\r\n override\r\n returns (bool)\r\n {\r\n return _operatorApprovals[owner][operator];\r\n }\r\n\r\n /**\r\n * @dev See {IERC721-transferFrom}.\r\n */\r\n function transferFrom(\r\n address from,\r\n address to,\r\n uint256 tokenId\r\n ) public override {\r\n _transfer(from, to, tokenId);\r\n }\r\n\r\n /**\r\n * @dev See {IERC721-safeTransferFrom}.\r\n */\r\n function safeTransferFrom(\r\n address from,\r\n address to,\r\n uint256 tokenId\r\n ) public override {\r\n //require(_tokenApprovals[tokenId] == _msgSender(), \"Not approved for this address\");\r\n safeTransferFrom(from, to, tokenId, \"\");\r\n }\r\n\r\n /**\r\n * @dev See {IERC721-safeTransferFrom}.\r\n */\r\n function safeTransferFrom(\r\n address from,\r\n address to,\r\n uint256 tokenId,\r\n bytes memory _data\r\n ) public override {\r\n _transfer(from, to, tokenId);\r\n require(\r\n _checkOnERC721Received(from, to, tokenId, _data),\r\n \"ERC721A: transfer to non ERC721Receiver implementer\"\r\n );\r\n }\r\n\r\n /**\r\n * @dev Returns whether tokenId exists.\r\n *\r\n * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.\r\n *\r\n * Tokens start existing when they are minted (_mint),\r\n */\r\n function _exists(uint256 tokenId) internal view returns (bool) {\r\n return _startTokenId() <= tokenId && tokenId < currentIndex;\r\n }\r\n\r\n function _safeMint(\r\n address to,\r\n uint256 quantity,\r\n bool isAdminMint\r\n ) internal {\r\n _safeMint(to, quantity, isAdminMint, \"\");\r\n }\r\n\r\n /**\r\n * @dev Mints quantity tokens and transfers them to to.\r\n *\r\n * Requirements:\r\n *\r\n * - there must be quantity tokens remaining unminted in the total collection.\r\n * - to cannot be the zero address.\r\n * - quantity cannot be larger than the max batch size.\r\n *\r\n * Emits a {Transfer} event.\r\n */\r\n function _safeMint(\r\n address to,\r\n uint256 quantity,\r\n bool isAdminMint,\r\n bytes memory _data\r\n ) internal {\r\n uint256 startTokenId = currentIndex;\r\n require(to != address(0), \"ERC721A: mint to the zero address\");\r\n // We know if the first token in the batch doesn't exist, the other ones don't as well, because of serial ordering.\r\n require(!_exists(startTokenId), \"ERC721A: token already minted\");\r\n require(quantity <= maxBatchSize, \"ERC721A: quantity to mint too high\");\r\n\r\n _beforeTokenTransfers(address(0), to, startTokenId, quantity);\r\n\r\n AddressData memory addressData = _addressData[to];\r\n _addressData[to] = AddressData(\r\n addressData.balance + uint128(quantity),\r\n addressData.numberMinted + (isAdminMint ? 0 : uint128(quantity))\r\n );\r\n\r\n uint256 updatedIndex = startTokenId;\r\n\r\n for (uint256 i = 0; i < quantity; i++) {\r\n _ownerships[updatedIndex] = TokenOwnership(\r\n to,\r\n uint64(block.timestamp)\r\n );\r\n emit Transfer(address(0), to, updatedIndex);\r\n require(\r\n _checkOnERC721Received(address(0), to, updatedIndex, _data),\r\n \"ERC721A: transfer to non ERC721Receiver implementer\"\r\n );\r\n\r\n updatedIndex++;\r\n }\r\n\r\n currentIndex = updatedIndex;\r\n _afterTokenTransfers(address(0), to, startTokenId, quantity);\r\n }\r\n\r\n /**\r\n * @dev Transfers tokenId from from to to.\r\n *\r\n * Requirements:\r\n *\r\n * - to cannot be the zero address.\r\n * - tokenId token must be owned by from.\r\n *\r\n * Emits a {Transfer} event.\r\n */\r\n function _transfer(\r\n address from,\r\n address to,\r\n uint256 tokenId\r\n ) private {\r\n TokenOwnership memory prevOwnership = ownershipOf(tokenId);\r\n\r\n bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||\r\n getApproved(tokenId) == _msgSender() ||\r\n isApprovedForAll(prevOwnership.addr, _msgSender()));\r\n\r\n require(\r\n isApprovedOrOwner,\r\n \"ERC721A: transfer caller is not owner nor approved\"\r\n );\r\n\r\n require(\r\n prevOwnership.addr == from,\r\n \"ERC721A: transfer from incorrect owner\"\r\n );\r\n //require(to != address(0), \"ERC721A: transfer to the zero address\");\r\n\r\n _beforeTokenTransfers(from, to, tokenId, 1);\r\n\r\n // Clear approvals from the previous owner\r\n _approve(address(0), tokenId, prevOwnership.addr);\r\n\r\n _addressData[from].balance -= 1;\r\n _addressData[to].balance += 1;\r\n _ownerships[tokenId] = TokenOwnership(to, uint64(block.timestamp));\r\n\r\n // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.\r\n // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.\r\n uint256 nextTokenId = tokenId + 1;\r\n if (_ownerships[nextTokenId].addr == address(0)) {\r\n if (_exists(nextTokenId)) {\r\n _ownerships[nextTokenId] = TokenOwnership(\r\n prevOwnership.addr,\r\n prevOwnership.startTimestamp\r\n );\r\n }\r\n }\r\n\r\n emit Transfer(from, to, tokenId);\r\n _afterTokenTransfers(from, to, tokenId, 1);\r\n }\r\n\r\n /**\r\n * @dev Approve to to operate on tokenId\r\n *\r\n * Emits a {Approval} event.\r\n */\r\n function _approve(\r\n address to,\r\n uint256 tokenId,\r\n address owner\r\n ) private {\r\n _tokenApprovals[tokenId] = to;\r\n emit Approval(owner, to, tokenId);\r\n }\r\n\r\n uint256 public nextOwnerToExplicitlySet = 0;\r\n\r\n /**\r\n * @dev Explicitly set owners to eliminate loops in future calls of ownerOf().\r\n */\r\n function _setOwnersExplicit(uint256 quantity) internal {\r\n uint256 oldNextOwnerToSet = nextOwnerToExplicitlySet;\r\n require(quantity > 0, \"quantity must be nonzero\");\r\n if (currentIndex == _startTokenId()) revert(\"No Tokens Minted Yet\");\r\n\r\n uint256 endIndex = oldNextOwnerToSet + quantity - 1;\r\n if (endIndex > collectionSize - 1) {\r\n endIndex = collectionSize - 1;\r\n }\r\n // We know if the last one in the group exists, all in the group exist, due to serial ordering.\r\n require(_exists(endIndex), \"not enough minted yet for this cleanup\");\r\n for (uint256 i = oldNextOwnerToSet; i <= endIndex; i++) {\r\n if (_ownerships[i].addr == address(0)) {\r\n TokenOwnership memory ownership = ownershipOf(i);\r\n _ownerships[i] = TokenOwnership(\r\n ownership.addr,\r\n ownership.startTimestamp\r\n );\r\n }\r\n }\r\n nextOwnerToExplicitlySet = endIndex + 1;\r\n }\r\n\r\n /**\r\n * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.\r\n * The call is not executed if the target address is not a contract.\r\n *\r\n * @param from address representing the previous owner of the given token ID\r\n * @param to target address that will receive the tokens\r\n * @param tokenId uint256 ID of the token to be transferred\r\n * @param _data bytes optional data to send along with the call\r\n * @return bool whether the call correctly returned the expected magic value\r\n */\r\n function _checkOnERC721Received(\r\n address from,\r\n address to,\r\n uint256 tokenId,\r\n bytes memory _data\r\n ) private returns (bool) {\r\n if (to.isContract()) {\r\n try\r\n IERC721Receiver(to).onERC721Received(\r\n _msgSender(),\r\n from,\r\n tokenId,\r\n _data\r\n )\r\n returns (bytes4 retval) {\r\n return retval == IERC721Receiver(to).onERC721Received.selector;\r\n } catch (bytes memory reason) {\r\n if (reason.length == 0) {\r\n revert(\r\n \"ERC721A: transfer to non ERC721Receiver implementer\"\r\n );\r\n } else {\r\n assembly {\r\n revert(add(32, reason), mload(reason))\r\n }\r\n }\r\n }\r\n } else {\r\n return true;\r\n }\r\n }\r\n\r\n /**\r\n * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.\r\n *\r\n * startTokenId - the first token id to be transferred\r\n * quantity - the amount to be transferred\r\n *\r\n * Calling conditions:\r\n *\r\n * - When from and to are both non-zero, from's tokenId will be\r\n * transferred to to.\r\n * - When from is zero, tokenId will be minted for to.\r\n */\r\n function _beforeTokenTransfers(\r\n address from,\r\n address to,\r\n uint256 startTokenId,\r\n uint256 quantity\r\n ) internal virtual {}\r\n\r\n /**\r\n * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes\r\n * minting.\r\n *\r\n * startTokenId - the first token id to be transferred\r\n * quantity - the amount to be transferred\r\n *\r\n * Calling conditions:\r\n *\r\n * - when from and to are both non-zero.\r\n * - from and to are never both zero.\r\n */\r\n function _afterTokenTransfers(\r\n address from,\r\n address to,\r\n uint256 startTokenId,\r\n uint256 quantity\r\n ) internal virtual {}\r\n}\r\n"
},
"@openzeppelin/contracts/access/Ownable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/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 Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\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 the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\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"
},
"@openzeppelin/contracts/utils/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"
},
"@openzeppelin/contracts/utils/Strings.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (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 uint8 private constant _ADDRESS_LENGTH = 20;\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 /**\n * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.\n */\n function toHexString(address addr) internal pure returns (string memory) {\n return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);\n }\n}\n"
},
"@openzeppelin/contracts/utils/introspection/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"
},
"@openzeppelin/contracts/utils/Address.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (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 /// @solidity memory-safe-assembly\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"
},
"@openzeppelin/contracts/token/ERC721/extensions/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"
},
"@openzeppelin/contracts/token/ERC721/IERC721.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../../utils/introspection/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 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"
},
"@openzeppelin/contracts/utils/math/SafeMath.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)\n\npragma solidity ^0.8.0;\n\n// CAUTION\n// This version of SafeMath should only be used with Solidity 0.8 or later,\n// because it relies on the compiler's built in overflow checks.\n\n/**\n * @dev Wrappers over Solidity's arithmetic operations.\n *\n * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler\n * now has built in overflow checking.\n */\nlibrary SafeMath {\n /**\n * @dev Returns the addition of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\n */\n function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n uint256 c = a + b;\n if (c < a) return (false, 0);\n return (true, c);\n }\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\n */\n function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b > a) return (false, 0);\n return (true, a - b);\n }\n }\n\n /**\n * @dev Returns the multiplication of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\n */\n function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n // Gas optimization: this is cheaper than requiring 'a' not being zero, but the\n // benefit is lost if 'b' is also tested.\n // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522\n if (a == 0) return (true, 0);\n uint256 c = a * b;\n if (c / a != b) return (false, 0);\n return (true, c);\n }\n }\n\n /**\n * @dev Returns the division of two unsigned integers, with a division by zero flag.\n *\n * _Available since v3.4._\n */\n function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b == 0) return (false, 0);\n return (true, a / b);\n }\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.\n *\n * _Available since v3.4._\n */\n function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b == 0) return (false, 0);\n return (true, a % b);\n }\n }\n\n /**\n * @dev Returns the addition of two unsigned integers, reverting on\n * overflow.\n *\n * Counterpart to Solidity's `+` operator.\n *\n * Requirements:\n *\n * - Addition cannot overflow.\n */\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n return a + b;\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, reverting on\n * overflow (when the result is negative).\n *\n * Counterpart to Solidity's `-` operator.\n *\n * Requirements:\n *\n * - Subtraction cannot overflow.\n */\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n return a - b;\n }\n\n /**\n * @dev Returns the multiplication of two unsigned integers, reverting on\n * overflow.\n *\n * Counterpart to Solidity's `*` operator.\n *\n * Requirements:\n *\n * - Multiplication cannot overflow.\n */\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n return a * b;\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers, reverting on\n * division by zero. The result is rounded towards zero.\n *\n * Counterpart to Solidity's `/` operator.\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n return a / b;\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * reverting when dividing by zero.\n *\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\n * opcode (which leaves remaining gas untouched) while Solidity uses an\n * invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function mod(uint256 a, uint256 b) internal pure returns (uint256) {\n return a % b;\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, reverting with custom message on\n * overflow (when the result is negative).\n *\n * CAUTION: This function is deprecated because it requires allocating memory for the error\n * message unnecessarily. For custom revert reasons use {trySub}.\n *\n * Counterpart to Solidity's `-` operator.\n *\n * Requirements:\n *\n * - Subtraction cannot overflow.\n */\n function sub(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n unchecked {\n require(b <= a, errorMessage);\n return a - b;\n }\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers, reverting with custom message on\n * division by zero. The result is rounded towards zero.\n *\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n * `revert` opcode (which leaves remaining gas untouched) while Solidity\n * uses an invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n unchecked {\n require(b > 0, errorMessage);\n return a / b;\n }\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * reverting with custom message when dividing by zero.\n *\n * CAUTION: This function is deprecated because it requires allocating memory for the error\n * message unnecessarily. For custom revert reasons use {tryMod}.\n *\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\n * opcode (which leaves remaining gas untouched) while Solidity uses an\n * invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function mod(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n unchecked {\n require(b > 0, errorMessage);\n return a % b;\n }\n }\n}\n"
},
"@openzeppelin/contracts/token/ERC721/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"
},
"@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC721.sol\";\n\n/**\n * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension\n * @dev See https://eips.ethereum.org/EIPS/eip-721\n */\ninterface IERC721Enumerable is IERC721 {\n /**\n * @dev Returns the total amount of tokens stored by the contract.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns a token ID owned by `owner` at a given `index` of its token list.\n * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.\n */\n function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);\n\n /**\n * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.\n * Use along with {totalSupply} to enumerate all tokens.\n */\n function tokenByIndex(uint256 index) external view returns (uint256);\n}\n"
},
"@openzeppelin/contracts/utils/introspection/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"
}
},
"settings": {
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"libraries": {}
}
} |