Overview
TokenID
4146
Total Transfers
-
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|
Contract Name:
Chains
Compiler Version
v0.8.9+commit.e5eed63a
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "./IBallerBars.sol"; import "./ChainsLibrary.sol"; import "./IChains.sol"; import "./IChainsTraits.sol"; contract Chains is ERC721Enumerable, Ownable { /** _______ ________ __ __ _______ ______ __ __ ________ _______ | \| \ \ | \ | \ / \| \ | \ | \ \ | ▓▓▓▓▓▓▓\ ▓▓▓▓▓▓▓▓ ▓▓\ | ▓▓ | ▓▓▓▓▓▓▓\ ▓▓▓▓▓▓\ ▓▓ | ▓▓ | ▓▓▓▓▓▓▓▓ ▓▓▓▓▓▓▓\ | ▓▓__/ ▓▓ ▓▓__ | ▓▓▓\| ▓▓ | ▓▓__/ ▓▓ ▓▓__| ▓▓ ▓▓ | ▓▓ | ▓▓__ | ▓▓__| ▓▓ | ▓▓ ▓▓ ▓▓ \ | ▓▓▓▓\ ▓▓ | ▓▓ ▓▓ ▓▓ ▓▓ ▓▓ | ▓▓ | ▓▓ \ | ▓▓ ▓▓ | ▓▓▓▓▓▓▓\ ▓▓▓▓▓ | ▓▓\▓▓ ▓▓ | ▓▓▓▓▓▓▓\ ▓▓▓▓▓▓▓▓ ▓▓ | ▓▓ | ▓▓▓▓▓ | ▓▓▓▓▓▓▓\ | ▓▓__/ ▓▓ ▓▓_____| ▓▓ \▓▓▓▓ | ▓▓__/ ▓▓ ▓▓ | ▓▓ ▓▓_____| ▓▓_____| ▓▓_____| ▓▓ | ▓▓ | ▓▓ ▓▓ ▓▓ \ ▓▓ \▓▓▓ | ▓▓ ▓▓ ▓▓ | ▓▓ ▓▓ \ ▓▓ \ ▓▓ \ ▓▓ | ▓▓ \▓▓▓▓▓▓▓ \▓▓▓▓▓▓▓▓\▓▓ \▓▓ \▓▓▓▓▓▓▓ \▓▓ \▓▓\▓▓▓▓▓▓▓▓\▓▓▓▓▓▓▓▓\▓▓▓▓▓▓▓▓\▓▓ \▓▓ _______ ______ _______ ________ __ __ ________ | \| \ \ | \ \ | \ \ | ▓▓▓▓▓▓▓\\▓▓▓▓▓▓ ▓▓▓▓▓▓▓\ \▓▓▓▓▓▓▓▓ ▓▓ | ▓▓ ▓▓▓▓▓▓▓▓ | ▓▓ | ▓▓ | ▓▓ | ▓▓ | ▓▓ | ▓▓ | ▓▓__| ▓▓ ▓▓__ | ▓▓ | ▓▓ | ▓▓ | ▓▓ | ▓▓ | ▓▓ | ▓▓ ▓▓ ▓▓ \ | ▓▓ | ▓▓ | ▓▓ | ▓▓ | ▓▓ | ▓▓ | ▓▓▓▓▓▓▓▓ ▓▓▓▓▓ | ▓▓__/ ▓▓_| ▓▓_| ▓▓__/ ▓▓ | ▓▓ | ▓▓ | ▓▓ ▓▓_____ | ▓▓ ▓▓ ▓▓ \ ▓▓ ▓▓ | ▓▓ | ▓▓ | ▓▓ ▓▓ \ \▓▓▓▓▓▓▓ \▓▓▓▓▓▓\▓▓▓▓▓▓▓ \▓▓ \▓▓ \▓▓\▓▓▓▓▓▓▓▓ _______ __ ______ ______ __ __ ______ __ __ ______ ______ __ __ | \| \ / \ / \| \ / \/ \| \ | \/ \| \ \ | \ | ▓▓▓▓▓▓▓\ ▓▓ | ▓▓▓▓▓▓\ ▓▓▓▓▓▓\ ▓▓ / ▓▓ ▓▓▓▓▓▓\ ▓▓ | ▓▓ ▓▓▓▓▓▓\\▓▓▓▓▓▓ ▓▓\ | ▓▓ | ▓▓__/ ▓▓ ▓▓ | ▓▓ | ▓▓ ▓▓ \▓▓ ▓▓/ ▓▓| ▓▓ \▓▓ ▓▓__| ▓▓ ▓▓__| ▓▓ | ▓▓ | ▓▓▓\| ▓▓ | ▓▓ ▓▓ ▓▓ | ▓▓ | ▓▓ ▓▓ | ▓▓ ▓▓ | ▓▓ | ▓▓ ▓▓ ▓▓ ▓▓ | ▓▓ | ▓▓▓▓\ ▓▓ | ▓▓▓▓▓▓▓\ ▓▓ | ▓▓ | ▓▓ ▓▓ __| ▓▓▓▓▓\ | ▓▓ __| ▓▓▓▓▓▓▓▓ ▓▓▓▓▓▓▓▓ | ▓▓ | ▓▓\▓▓ ▓▓ | ▓▓__/ ▓▓ ▓▓_____| ▓▓__/ ▓▓ ▓▓__/ \ ▓▓ \▓▓\| ▓▓__/ \ ▓▓ | ▓▓ ▓▓ | ▓▓_| ▓▓_| ▓▓ \▓▓▓▓ | ▓▓ ▓▓ ▓▓ \\▓▓ ▓▓\▓▓ ▓▓ ▓▓ \▓▓\\▓▓ ▓▓ ▓▓ | ▓▓ ▓▓ | ▓▓ ▓▓ \ ▓▓ \▓▓▓ \▓▓▓▓▓▓▓ \▓▓▓▓▓▓▓▓ \▓▓▓▓▓▓ \▓▓▓▓▓▓ \▓▓ \▓▓ \▓▓▓▓▓▓ \▓▓ \▓▓\▓▓ \▓▓\▓▓▓▓▓▓\▓▓ \▓▓ **/ // RGV2YmVycnkjNDAzMCBhbmQgcG9ua3lwaW5rIzc5MTMgd2VyZSBoZXJl using ChainsLibrary for uint8; struct Trait { string traitName; string traitType; string pixels; uint256 pixelCount; } // Mappings mapping(string => bool) hashToMinted; mapping(uint256 => string) internal tokenIdToHash; mapping(uint256 => uint256) internal tokenIdToTimestamp; // uint256s uint256 public constant MAX_SUPPLY = 6000; uint256 SEED_NONCE = 0; // Addresses address _genOneChainsAddress; address _genOneBallerBarsAddress; address _genTwoBallerBarsAddress; bool public _paused = true; uint256 public _combinedTotalSupply = 3406; uint256 _reserveMinted = 0; constructor() ERC721("Chains", "CHAIN") {} function rarityGen0(uint256 r) private pure returns (uint256) { if (r >= 330) {return 4;} if (r >= 150) {return 3;} if (r >= 30) {return 2;} if (r >= 3) {return 1;} return 0; } function rarityGen1(uint256 r) private pure returns (uint256) { if (r >= 504) {return 9;} if (r >= 414) {return 8;} if (r >= 330) {return 7;} if (r >= 252) {return 6;} if (r >= 180) {return 5;} if (r >= 114) {return 4;} if (r >= 54) {return 3;} if (r >= 9) {return 2;} if (r >= 3) {return 1;} return 0; } function rarityGen2(uint256 r) private pure returns (uint256) { if (r >= 471) {return 9;} if (r >= 372) {return 8;} if (r >= 285) {return 7;} if (r >= 207) {return 6;} if (r >= 135) {return 5;} if (r >= 69) {return 4;} if (r >= 21) {return 3;} if (r >= 9) {return 2;} if (r >= 3) {return 1;} return 0; } function rarityGen3(uint256 r) private pure returns (uint256) { if (r >= 462) {return 7;} if (r >= 336) {return 6;} if (r >= 222) {return 5;} if (r >= 120) {return 4;} if (r >= 33) {return 3;} if (r >= 9) {return 2;} if (r >= 3) {return 1;} return 0; } function rarityGen4(uint256 r) private pure returns (uint256) { if (r >= 93) {return 7;} if (r >= 63) {return 6;} if (r >= 45) {return 5;} if (r >= 33) {return 4;} if (r >= 21) {return 3;} if (r >= 9) {return 2;} if (r >= 3) {return 1;} return 0; } function rarityGen5(uint256 r) private pure returns (uint256) { if (r >= 93) {return 7;} if (r >= 63) {return 6;} if (r >= 45) {return 5;} if (r >= 33) {return 4;} if (r >= 21) {return 3;} if (r >= 9) {return 2;} if (r >= 3) {return 1;} return 0; } function hash( uint256 _t, address _a ) internal returns (string memory) { // This will generate a 7 character string. // The last 6 digits are random, the first is 0, due to the chain is not being burned. SEED_NONCE++; bytes memory buffer = new bytes(7); buffer[0] = bytes1(uint8(48)); unchecked { for (uint _c=0; _c<4; _c++) { uint256 _largeRandom = uint256( keccak256( abi.encodePacked( block.timestamp, block.difficulty, _t, _a, _c, SEED_NONCE ) ) ); for (uint i=0; i<4; i++) { buffer[1] = bytes1(uint8(48 + rarityGen0(_largeRandom % 600))); _largeRandom /= 600; buffer[2] = bytes1(uint8(48 + rarityGen1(_largeRandom % 600))); _largeRandom /= 600; buffer[3] = bytes1(uint8(48 + rarityGen2(_largeRandom % 600))); _largeRandom /= 600; buffer[4] = bytes1(uint8(48 + rarityGen3(_largeRandom % 600))); _largeRandom /= 600; buffer[5] = bytes1(uint8(48 + rarityGen4(_largeRandom % 600))); _largeRandom /= 600; buffer[6] = bytes1(uint8(48 + rarityGen5(_largeRandom % 600))); string memory currentHash = string(buffer); if (hashToMinted[currentHash] == false) { return currentHash; } _largeRandom /= 600; } } // use background 4 buffer[6] = bytes1(uint8(48 + 4)); } return string(buffer); } /** * @dev Returns the current baller bar cost of a mint. */ function currentBallerBarsCost() public view returns (uint256) { uint256 _totalSupply = _combinedTotalSupply; if (_totalSupply <= 3000) return 4 ether; if (_totalSupply > 3000 && _totalSupply <= 4000) return 8 ether; if (_totalSupply > 4000 && _totalSupply <= 5000) return 16 ether; return 24 ether; } /** * @dev Mint reserve. Owner only, for giveaways and tests * @param tokenQuantity Quantity of tokens */ function mintReserve(uint256 tokenQuantity) onlyOwner external { require(_reserveMinted+tokenQuantity<7,"EXCEEDS_RESERVE_MINTS"); for (uint256 i = 0; i < tokenQuantity; i++) { ++_reserveMinted; mintInternal(); } } /** * @dev Mint internal, this is to avoid code duplication. */ function mintInternal() internal { require(_combinedTotalSupply < MAX_SUPPLY); require(tx.origin == msg.sender); uint256 thisTokenId = _combinedTotalSupply; tokenIdToHash[thisTokenId] = hash(thisTokenId, msg.sender); hashToMinted[tokenIdToHash[thisTokenId]] = true; tokenIdToTimestamp[thisTokenId] = block.timestamp; _combinedTotalSupply++; _mint(msg.sender, thisTokenId); } /** * @dev Mint for BallerBars * @param ballerBarsGeneration The generation of Baller Bars to use. */ function mintWithBallerBars(uint256 ballerBarsGeneration) public { require(_paused==false,"PAUSED"); IBallerBars ballerBarsContract = getBallerBarsContract(ballerBarsGeneration); ballerBarsContract.burnFrom(msg.sender, currentBallerBarsCost()); mintInternal(); } /** * @dev Mint for BallerBars with both BallerBars generation one and generation 2 * @param bbOneAmount The amount of BB generation one to burn * @param bbOneAmount The amount of BB generation two to burn */ function mintWithBallerBarsSpecial(uint256 bbOneAmount, uint256 bbTwoAmount) public { require(_paused==false,"PAUSED"); require(bbOneAmount+bbTwoAmount==currentBallerBarsCost(),"INVALID_COMBINATION"); IBallerBars ballerBarsGenOneContract = IBallerBars(_genOneBallerBarsAddress); IBallerBars ballerBarsGenTwoContract = IBallerBars(_genTwoBallerBarsAddress); ballerBarsGenOneContract.burnFrom(msg.sender, bbOneAmount); ballerBarsGenTwoContract.burnFrom(msg.sender, bbTwoAmount); mintInternal(); } /** * @dev Burns and mints new. * @param _tokenId The token to burn. */ function burnForMint(uint256 _tokenId) public { require(_paused==false,"PAUSED"); //Burn token _transfer( msg.sender, 0x000000000000000000000000000000000000dEaD, _tokenId ); mintInternal(); } /** * @dev Burns previous generation chain and mints new one. * @param _tokenId The token to burn. */ function burnGenOneForMint(uint256 _tokenId) public { require(_paused==false,"PAUSED"); IChains chainsGenOne = IChains(_genOneChainsAddress); hashToMinted[chainsGenOne._tokenIdToHash(_tokenId)] = true; //Burn token chainsGenOne.transferFrom( msg.sender, 0x000000000000000000000000000000000000dEaD, _tokenId ); mintInternal(); } /** * @dev Migrates previous generation chain to this one. * @param _tokenId The token to migrate */ function migrateGenOne(uint256 _tokenId) public { require(_paused==false,"PAUSED"); migrate(_tokenId); } /** * @dev Migrates previous generation chain * @param _tokenId The token to migrate */ function migrate(uint _tokenId) internal { require(_tokenId < 3406, "TOKEN_ID_TOO_HIGH"); IChains chainsGenOne = IChains(_genOneChainsAddress); tokenIdToHash[_tokenId] = chainsGenOne._tokenIdToHash(_tokenId); hashToMinted[tokenIdToHash[_tokenId]] = true; tokenIdToTimestamp[_tokenId] = chainsGenOne.getTokenTimestamp(_tokenId); //Burn token chainsGenOne.transferFrom( msg.sender, 0x000000000000000000000000000000000000dEaD, _tokenId ); _mint(msg.sender, _tokenId); } /** * @dev Hash to SVG function */ function hashToSVG(string memory _hash) public view returns (string memory) { string memory svgString; string memory bgString; string memory bgColor; // bool[24][24] memory placedPixels; uint8 bgIndex = ChainsLibrary.parseInt(ChainsLibrary.substring(_hash, 6, 7)); // BG if ( bgIndex == 0 ) { bgColor = "2596be"; } else if ( bgIndex == 1 ) { bgColor = "10447c"; } else if ( bgIndex == 2 ) { bgColor = "c8fcfc"; } else if ( bgIndex == 3 ) { bgColor = "383434"; } else if ( bgIndex == 4 ) { bgColor = "ffe4bc"; } else if ( bgIndex == 5 ) { bgColor = "d0ccfc"; }else if ( bgIndex == 6 ) { bgColor = "e0dcdc"; } if ( bgIndex < 7 ) { // bg color 7 is none bgString = string( abi.encodePacked( 'style="background-color:#', bgColor, '" ' ) ); } else { bgString = ""; } for (uint8 i = 0; i < 6; i++) { // 7 (we should skip BG here, so 6 will be final) uint8 thisTraitIndex = ChainsLibrary.parseInt( ChainsLibrary.substring(_hash, i, i + 1) ); (,,string memory pixels,uint256 pixelCount)= IChainsTraits(_genOneChainsAddress).traitTypes(i, thisTraitIndex); for ( uint16 j = 0; j < pixelCount; // < j++ ) { string memory thisPixel = ChainsLibrary.substring( pixels, j * 4, j * 4 + 4 ); uint8 x = uint8(bytes(thisPixel)[0]) - 96; uint8 y = uint8(bytes(thisPixel)[1]) - 96; if (placedPixels[x][y]) continue; svgString = string( abi.encodePacked( svgString, "<rect class='c", ChainsLibrary.substring(thisPixel, 2, 4), "' x='", x.toString(), "' y='", y.toString(), "'/>" ) ); placedPixels[x][y] = true; } } svgString = string( abi.encodePacked( '<svg id="c" xmlns="http://www.w3.org/2000/svg" ', 'preserveAspectRatio="xMinYMin meet" viewBox="0 0 26 26" ', bgString, ' > ', svgString, '<style>rect{width:1px;height:1px;}#c{shape-rendering: crispedges;}.c00{fill:#d844cf}.c01{fill:#f1f1f1}.c02{fill:#ff4b54}.c03{fill:#ff6b71}.c04{fill:#ff5c64}.c05{fill:#ff132f}.c06{fill:#ff4651}.c07{fill:#ff444f}.c08{fill:#ff3644}.c09{fill:#ff3543}.c10{fill:#ff3845}.c11{fill:#ff4d57}.c12{fill:#c146fb}.c13{fill:#333aff}.c14{fill:#c2defc}.c15{fill:#eaf4ff}.c16{fill:#e3eefa}.c17{fill:#cfe4fa}.c18{fill:#b61ffc}.c19{fill:#bf42fb}.c20{fill:#bc35fb}.c21{fill:#bd36fb}.c22{fill:#fee4bf}.c23{fill:#ff8800}.c24{fill:#ffd300}.c25{fill:#ffc200}.c26{fill:#ff9a00}.c27{fill:#ffb100}.c28{fill:#ffa000}.c29{fill:#f6d900}.c30{fill:#f0ce00}.c31{fill:#eed100}.c32{fill:#00e58b}.c33{fill:#00df71}.c34{fill:#00e280}.c35{fill:#00cb59}.c36{fill:#00d874}.c37{fill:#00d963}.c38{fill:#00d36c}.c39{fill:#00de7c}.c40{fill:#ebb7a5}.c41{fill:#e3aa96}.c42{fill:#094378}.c43{fill:#c1a900}.c44{fill:#dcc000}.c45{fill:#fade11}.c46{fill:#f8dc09}.c47{fill:#00c5e6}.c48{fill:#dcdcdc}.c49{fill:#c1f8f9}.c50{fill:#b2b8b9}.c51{fill:#aab0b1}.c52{fill:#b0b4b5}.c53{fill:#e2a38d}.c54{fill:#eba992}.c55{fill:#e8b2a0}.c56{fill:#ff0043}.c57{fill:#f6767b}.c58{fill:#c74249}.c59{fill:#aa343a}.c60{fill:#4047ff}.c61{fill:#585eff}.c62{fill:#4d54ff}.c63{fill:#222bff}.c64{fill:#3d44ff}.c65{fill:#3b42ff}.c66{fill:#3239ff}.c67{fill:#343bff}.c68{fill:#4249ff}.c69{fill:#333333}.c70{fill:#222222}.c71{fill:#ccccff}</style></svg>' ) ); return svgString; } /** * @dev Hash to metadata function */ function hashToMetadata(string memory _hash) public view returns (string memory) { string memory metadataString; for (uint8 i = 0; i < 7; i++) { //9 uint8 thisTraitIndex = ChainsLibrary.parseInt( ChainsLibrary.substring(_hash, i, i + 1) ); (string memory traitName,string memory traitType,,) = IChainsTraits(_genOneChainsAddress).traitTypes(i, thisTraitIndex); metadataString = string( abi.encodePacked( metadataString, '{"trait_type":"', traitType, '","value":"', traitName, '"},' ) ); } metadataString = string( abi.encodePacked( metadataString, '{"display_type": "boost_number", "trait_type": "BB Boost", "value":', ChainsLibrary.toString(IBallerBars(_genTwoBallerBarsAddress)._calculateBoost(_hash)),'}' ) ); return string(abi.encodePacked("[", metadataString, "]")); } /** * @dev Returns the SVG and metadata for a token Id * @param _tokenId The tokenId to return the SVG and metadata for. */ function tokenURI(uint256 _tokenId) public view override returns (string memory) { require(_exists(_tokenId)); string memory tokenHash = _tokenIdToHash(_tokenId); return string( abi.encodePacked( "data:application/json;base64,", ChainsLibrary.encode( bytes( string( abi.encodePacked( '{"name": "BlockChain #', ChainsLibrary.toString(_tokenId), '", "description": "The BlockChains collection serves as the first', 'phase of Ben Baller','Did The BlockChain.","image": "data:image/svg+xml;base64,', ChainsLibrary.encode( bytes(hashToSVG(tokenHash)) ), '","attributes":', hashToMetadata(tokenHash), "}" ) ) ) ) ) ); } /** * @dev Returns a hash for a given tokenId * @param _tokenId The tokenId to return the hash for. */ function _tokenIdToHash(uint256 _tokenId) public view returns (string memory) { string memory tokenHash = tokenIdToHash[_tokenId]; //If this is a burned token, override the previous hash if (ownerOf(_tokenId) == 0x000000000000000000000000000000000000dEaD) { tokenHash = string( abi.encodePacked( "1", ChainsLibrary.substring(tokenHash, 1, 7) ) ); } return tokenHash; } /** * @dev Returns the mint timestamp of a tokenId * @param _tokenId The tokenId to return the timestamp for. */ function getTokenTimestamp(uint256 _tokenId) public view returns (uint256) { return tokenIdToTimestamp[_tokenId]; } /** * @dev Returns the wallet of a given wallet. Mainly for ease for frontend devs. * @param _wallet The wallet to get the tokens of. */ function walletOfOwner(address _wallet) public view returns (uint256[] memory) { uint256 tokenCount = balanceOf(_wallet); uint256[] memory tokensId = new uint256[](tokenCount); for (uint256 i; i < tokenCount; i++) { tokensId[i] = tokenOfOwnerByIndex(_wallet, i); } return tokensId; } function togglePauseStatus() external onlyOwner { _paused = !_paused; } /** * @dev Sets BB contract address based on generation * @param ballerBarsAddress The BB contract address * @param generation The generation of chains contract */ function setBallerBarsAddress(address ballerBarsAddress,uint256 generation) onlyOwner public { require(generation==1||generation==2,"INVALID_GEN"); if(generation == 1){ _genOneBallerBarsAddress = ballerBarsAddress; }else if(generation == 2){ _genTwoBallerBarsAddress = ballerBarsAddress; } } /** * @dev Sets generation one chains contract address * @param genOneChainsAddress The chains contract address */ function setGenOneChainsAddress(address genOneChainsAddress) onlyOwner public { _genOneChainsAddress = genOneChainsAddress; } /** * @dev Returns BB contract based on generation * @param generation The generation of contract to return. 1 or 2 */ function getBallerBarsContract(uint256 generation) internal view returns (IBallerBars) { if(generation == 1){ return IBallerBars(_genOneBallerBarsAddress); }else if(generation == 2){ return IBallerBars(_genTwoBallerBarsAddress); }else{ revert("INVALID_GEN"); } } /** * @dev Returns the number of rare assets of a tokenId * @param _tokenId The tokenId to return the number of rare assets for. */ function getTokenRarityCount(uint256 _tokenId) public view returns (uint256) { require(_tokenId<3406,"NOT_GEN_ONE_CHAIN"); return IChains(_genOneChainsAddress).getTokenRarityCount(_tokenId); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; interface IChainsTraits { function traitTypes(uint256 i, uint256 j) external view returns (string memory,string memory,string memory,uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol"; interface IChains is IERC721Enumerable { function getTokenTimestamp(uint256 _tokenId) external view returns (uint256); function getTokenRarityCount(uint256 _tokenId) external view returns (uint256); function _tokenIdToHash(uint256 _tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; interface IBallerBars is IERC20 { function burnFrom(address account, uint256 amount) external; function burnUnclaimed(uint256[] memory _tokenIds, uint256 amount) external; function _calculateBoost(string memory _hash) external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; library ChainsLibrary { string internal constant TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; function encode(bytes memory data) internal pure returns (string memory) { if (data.length == 0) return ""; // load the table into memory string memory table = TABLE; // multiply by 4/3 rounded up uint256 encodedLen = 4 * ((data.length + 2) / 3); // add some extra buffer at the end required for the writing string memory result = new string(encodedLen + 32); assembly { // set the actual output length mstore(result, encodedLen) // prepare the lookup table let tablePtr := add(table, 1) // input ptr let dataPtr := data let endPtr := add(dataPtr, mload(data)) // result ptr, jump over length let resultPtr := add(result, 32) // run over the input, 3 bytes at a time for { } lt(dataPtr, endPtr) { } { dataPtr := add(dataPtr, 3) // read 3 bytes let input := mload(dataPtr) // write 4 characters mstore( resultPtr, shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F)))) ) resultPtr := add(resultPtr, 1) mstore( resultPtr, shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F)))) ) resultPtr := add(resultPtr, 1) mstore( resultPtr, shl(248, mload(add(tablePtr, and(shr(6, input), 0x3F)))) ) resultPtr := add(resultPtr, 1) mstore( resultPtr, shl(248, mload(add(tablePtr, and(input, 0x3F)))) ) resultPtr := add(resultPtr, 1) } // padding with '=' switch mod(mload(data), 3) case 1 { mstore(sub(resultPtr, 2), shl(240, 0x3d3d)) } case 2 { mstore(sub(resultPtr, 1), shl(248, 0x3d)) } } return result; } /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } function parseInt(string memory _a) internal pure returns (uint8 _parsedInt) { bytes memory bresult = bytes(_a); uint8 mint = 0; for (uint8 i = 0; i < bresult.length; i++) { if ( (uint8(uint8(bresult[i])) >= 48) && (uint8(uint8(bresult[i])) <= 57) ) { mint *= 10; mint += uint8(bresult[i]) - 48; } } return mint; } function substring( string memory str, uint256 startIndex, uint256 endIndex ) internal pure returns (string memory) { bytes memory strBytes = bytes(str); bytes memory result = new bytes(endIndex - startIndex); for (uint256 i = startIndex; i < endIndex; i++) { result[i - startIndex] = strBytes[i]; } return string(result); } function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../ERC721.sol"; import "./IERC721Enumerable.sol"; /** * @dev This implements an optional extension of {ERC721} defined in the EIP that adds * enumerability of all the token ids in the contract as well as all token ids owned by each * account. */ abstract contract ERC721Enumerable is ERC721, IERC721Enumerable { // Mapping from owner to list of owned token IDs mapping(address => mapping(uint256 => uint256)) private _ownedTokens; // Mapping from token ID to index of the owner tokens list mapping(uint256 => uint256) private _ownedTokensIndex; // Array with all token ids, used for enumeration uint256[] private _allTokens; // Mapping from token id to position in the allTokens array mapping(uint256 => uint256) private _allTokensIndex; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) { return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) { require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds"); return _ownedTokens[owner][index]; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _allTokens.length; } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view virtual override returns (uint256) { require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds"); return _allTokens[index]; } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` cannot be the zero address. * - `to` cannot be the zero address. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override { super._beforeTokenTransfer(from, to, tokenId); if (from == address(0)) { _addTokenToAllTokensEnumeration(tokenId); } else if (from != to) { _removeTokenFromOwnerEnumeration(from, tokenId); } if (to == address(0)) { _removeTokenFromAllTokensEnumeration(tokenId); } else if (to != from) { _addTokenToOwnerEnumeration(to, tokenId); } } /** * @dev Private function to add a token to this extension's ownership-tracking data structures. * @param to address representing the new owner of the given token ID * @param tokenId uint256 ID of the token to be added to the tokens list of the given address */ function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private { uint256 length = ERC721.balanceOf(to); _ownedTokens[to][length] = tokenId; _ownedTokensIndex[tokenId] = length; } /** * @dev Private function to add a token to this extension's token tracking data structures. * @param tokenId uint256 ID of the token to be added to the tokens list */ function _addTokenToAllTokensEnumeration(uint256 tokenId) private { _allTokensIndex[tokenId] = _allTokens.length; _allTokens.push(tokenId); } /** * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for * gas optimizations e.g. when performing a transfer operation (avoiding double writes). * This has O(1) time complexity, but alters the order of the _ownedTokens array. * @param from address representing the previous owner of the given token ID * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address */ function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private { // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = ERC721.balanceOf(from) - 1; uint256 tokenIndex = _ownedTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary if (tokenIndex != lastTokenIndex) { uint256 lastTokenId = _ownedTokens[from][lastTokenIndex]; _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index } // This also deletes the contents at the last position of the array delete _ownedTokensIndex[tokenId]; delete _ownedTokens[from][lastTokenIndex]; } /** * @dev Private function to remove a token from this extension's token tracking data structures. * This has O(1) time complexity, but alters the order of the _allTokens array. * @param tokenId uint256 ID of the token to be removed from the tokens list */ function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private { // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = _allTokens.length - 1; uint256 tokenIndex = _allTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding // an 'if' statement (like in _removeTokenFromOwnerEnumeration) uint256 lastTokenId = _allTokens[lastTokenIndex]; _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index // This also deletes the contents at the last position of the array delete _allTokensIndex[tokenId]; _allTokens.pop(); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IERC721.sol"; import "./IERC721Receiver.sol"; import "./extensions/IERC721Metadata.sol"; import "../../utils/Address.sol"; import "../../utils/Context.sol"; import "../../utils/Strings.sol"; import "../../utils/introspection/ERC165.sol"; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: owner query for nonexistent token"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { require(operator != _msgSender(), "ERC721: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ERC721.ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint( address to, uint256 tokenId, bytes memory _data ) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) internal virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _setOwner(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _setOwner(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _setOwner(newOwner); } function _setOwner(address newOwner) private { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
{ "remappings": [], "optimizer": { "enabled": true, "runs": 200 }, "evmVersion": "london", "libraries": {}, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"MAX_SUPPLY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_combinedTotalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"_tokenIdToHash","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"burnForMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"burnGenOneForMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"currentBallerBarsCost","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"getTokenRarityCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"getTokenTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_hash","type":"string"}],"name":"hashToMetadata","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_hash","type":"string"}],"name":"hashToSVG","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"migrateGenOne","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenQuantity","type":"uint256"}],"name":"mintReserve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"ballerBarsGeneration","type":"uint256"}],"name":"mintWithBallerBars","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"bbOneAmount","type":"uint256"},{"internalType":"uint256","name":"bbTwoAmount","type":"uint256"}],"name":"mintWithBallerBarsSpecial","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"ballerBarsAddress","type":"address"},{"internalType":"uint256","name":"generation","type":"uint256"}],"name":"setBallerBarsAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"genOneChainsAddress","type":"address"}],"name":"setGenOneChainsAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"togglePauseStatus","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_wallet","type":"address"}],"name":"walletOfOwner","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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