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此合同的源代码已经过验证！
合同元数据
编译器
0.8.7+commit.e28d00a7
语言
Solidity
合同源代码
文件 1 的 1：UnicodeForGeeks.sol
// _ _ _ _ ____ _____ _ __
// | | | | (_) | | / / _| / ____| | | \ \
// | | | |_ __ _ ___ ___ __| | ___ | | |_ ___ _ __ | | __ ___ ___| | _____| |
// | | | | '_ \| |/ __/ _ \ / _` |/ _ \ | | _/ _ \| '__| | | |_ |/ _ \/ _ \ |/ / __| |
// | |__| | | | | | (_| (_) | (_| | __/ | | || (_) | | | |__| | __/ __/ <\__ \ |
// \____/|_| |_|_|\___\___/ \__,_|\___| | |_| \___/|_| \_____|\___|\___|_|\_\___/ |
// \_\ /_/
//
// An NFT contract for Unicode characters. Strictly limited supply of 143,859, but only one u.
// Free to mint - call `mintAny()` or `mintAll()`.
// File: UnicodeMap.sol
pragma solidity ^0.8.2;
library UnicodeMap {
function codepointToBlock(uint256 cp) external pure returns(string memory) {
if(cp < 66560) {
if(cp < 10224) {
if(cp < 5920) {
if(cp < 2304) {
if(cp < 1424) {
if(cp < 688) {
if(cp < 256) {
if(cp < 128) {
return "Basic Latin";
} else {
return "Latin-1 Supplement";
}
} else {
if(cp < 384) {
return "Latin Extended-A";
} else {
if(cp < 592) {
return "Latin Extended-B";
} else {
return "IPA Extensions";
}
}
}
} else {
if(cp < 1024) {
if(cp < 768) {
return "Spacing Modifier Letters";
} else {
if(cp < 880) {
return "Combining Diacritical Marks";
} else {
return "Greek and Coptic";
}
}
} else {
if(cp < 1280) {
return "Cyrillic";
} else {
if(cp < 1328) {
return "Cyrillic Supplement";
} else {
return "Armenian";
}
}
}
}
} else {
if(cp < 1984) {
if(cp < 1792) {
if(cp < 1536) {
return "Hebrew";
} else {
return "Arabic";
}
} else {
if(cp < 1872) {
return "Syriac";
} else {
if(cp < 1920) {
return "Arabic Supplement";
} else {
return "Thaana";
}
}
}
} else {
if(cp < 2144) {
if(cp < 2048) {
return "NKo";
} else {
if(cp < 2112) {
return "Samaritan";
} else {
return "Mandaic";
}
}
} else {
if(cp < 2160) {
return "Syriac Supplement";
} else {
if(cp < 2208) {
return "";
} else {
return "Arabic Extended-A";
}
}
}
}
}
} else {
if(cp < 3712) {
if(cp < 2944) {
if(cp < 2560) {
if(cp < 2432) {
return "Devanagari";
} else {
return "Bengali";
}
} else {
if(cp < 2688) {
return "Gurmukhi";
} else {
if(cp < 2816) {
return "Gujarati";
} else {
return "Oriya";
}
}
}
} else {
if(cp < 3328) {
if(cp < 3072) {
return "Tamil";
} else {
if(cp < 3200) {
return "Telugu";
} else {
return "Kannada";
}
}
} else {
if(cp < 3456) {
return "Malayalam";
} else {
if(cp < 3584) {
return "Sinhala";
} else {
return "Thai";
}
}
}
}
} else {
if(cp < 4992) {
if(cp < 4256) {
if(cp < 3840) {
return "Lao";
} else {
if(cp < 4096) {
return "Tibetan";
} else {
return "Myanmar";
}
}
} else {
if(cp < 4352) {
return "Georgian";
} else {
if(cp < 4608) {
return "Hangul Jamo";
} else {
return "Ethiopic";
}
}
}
} else {
if(cp < 5760) {
if(cp < 5024) {
return "Ethiopic Supplement";
} else {
if(cp < 5120) {
return "Cherokee";
} else {
return "Unified Canadian Aboriginal Syllabics";
}
}
} else {
if(cp < 5792) {
return "Ogham";
} else {
if(cp < 5888) {
return "Runic";
} else {
return "Tagalog";
}
}
}
}
}
}
} else {
if(cp < 7424) {
if(cp < 6688) {
if(cp < 6320) {
if(cp < 5984) {
if(cp < 5952) {
return "Hanunoo";
} else {
return "Buhid";
}
} else {
if(cp < 6016) {
return "Tagbanwa";
} else {
if(cp < 6144) {
return "Khmer";
} else {
return "Mongolian";
}
}
}
} else {
if(cp < 6528) {
if(cp < 6400) {
return "Unified Canadian Aboriginal Syllabics Extended";
} else {
if(cp < 6480) {
return "Limbu";
} else {
return "Tai Le";
}
}
} else {
if(cp < 6624) {
return "New Tai Lue";
} else {
if(cp < 6656) {
return "Khmer Symbols";
} else {
return "Buginese";
}
}
}
}
} else {
if(cp < 7168) {
if(cp < 6912) {
if(cp < 6832) {
return "Tai Tham";
} else {
return "Combining Diacritical Marks Extended";
}
} else {
if(cp < 7040) {
return "Balinese";
} else {
if(cp < 7104) {
return "Sundanese";
} else {
return "Batak";
}
}
}
} else {
if(cp < 7312) {
if(cp < 7248) {
return "Lepcha";
} else {
if(cp < 7296) {
return "Ol Chiki";
} else {
return "Cyrillic Extended-C";
}
}
} else {
if(cp < 7360) {
return "Georgian Extended";
} else {
if(cp < 7376) {
return "Sundanese Supplement";
} else {
return "Vedic Extensions";
}
}
}
}
}
} else {
if(cp < 8592) {
if(cp < 8192) {
if(cp < 7616) {
if(cp < 7552) {
return "Phonetic Extensions";
} else {
return "Phonetic Extensions Supplement";
}
} else {
if(cp < 7680) {
return "Combining Diacritical Marks Supplement";
} else {
if(cp < 7936) {
return "Latin Extended Additional";
} else {
return "Greek Extended";
}
}
}
} else {
if(cp < 8400) {
if(cp < 8304) {
return "General Punctuation";
} else {
if(cp < 8352) {
return "Superscripts and Subscripts";
} else {
return "Currency Symbols";
}
}
} else {
if(cp < 8448) {
return "Combining Diacritical Marks for Symbols";
} else {
if(cp < 8528) {
return "Letterlike Symbols";
} else {
return "Number Forms";
}
}
}
}
} else {
if(cp < 9472) {
if(cp < 9216) {
if(cp < 8704) {
return "Arrows";
} else {
if(cp < 8960) {
return "Mathematical Operators";
} else {
return "Miscellaneous Technical";
}
}
} else {
if(cp < 9280) {
return "Control Pictures";
} else {
if(cp < 9312) {
return "Optical Character Recognition";
} else {
return "Enclosed Alphanumerics";
}
}
}
} else {
if(cp < 9728) {
if(cp < 9600) {
return "Box Drawing";
} else {
if(cp < 9632) {
return "Block Elements";
} else {
return "Geometric Shapes";
}
}
} else {
if(cp < 9984) {
return "Miscellaneous Symbols";
} else {
if(cp < 10176) {
return "Dingbats";
} else {
return "Miscellaneous Mathematical Symbols-A";
}
}
}
}
}
}
}
} else {
if(cp < 43264) {
if(cp < 12592) {
if(cp < 11648) {
if(cp < 11008) {
if(cp < 10496) {
if(cp < 10240) {
return "Supplemental Arrows-A";
} else {
return "Braille Patterns";
}
} else {
if(cp < 10624) {
return "Supplemental Arrows-B";
} else {
if(cp < 10752) {
return "Miscellaneous Mathematical Symbols-B";
} else {
return "Supplemental Mathematical Operators";
}
}
}
} else {
if(cp < 11392) {
if(cp < 11264) {
return "Miscellaneous Symbols and Arrows";
} else {
if(cp < 11360) {
return "Glagolitic";
} else {
return "Latin Extended-C";
}
}
} else {
if(cp < 11520) {
return "Coptic";
} else {
if(cp < 11568) {
return "Georgian Supplement";
} else {
return "Tifinagh";
}
}
}
}
} else {
if(cp < 12256) {
if(cp < 11776) {
if(cp < 11744) {
return "Ethiopic Extended";
} else {
return "Cyrillic Extended-A";
}
} else {
if(cp < 11904) {
return "Supplemental Punctuation";
} else {
if(cp < 12032) {
return "CJK Radicals Supplement";
} else {
return "Kangxi Radicals";
}
}
}
} else {
if(cp < 12352) {
if(cp < 12272) {
return "";
} else {
if(cp < 12288) {
return "Ideographic Description Characters";
} else {
return "CJK Symbols and Punctuation";
}
}
} else {
if(cp < 12448) {
return "Hiragana";
} else {
if(cp < 12544) {
return "Katakana";
} else {
return "Bopomofo";
}
}
}
}
}
} else {
if(cp < 42128) {
if(cp < 12800) {
if(cp < 12704) {
if(cp < 12688) {
return "Hangul Compatibility Jamo";
} else {
return "Kanbun";
}
} else {
if(cp < 12736) {
return "Bopomofo Extended";
} else {
if(cp < 12784) {
return "CJK Strokes";
} else {
return "Katakana Phonetic Extensions";
}
}
}
} else {
if(cp < 19904) {
if(cp < 13056) {
return "Enclosed CJK Letters and Months";
} else {
if(cp < 13312) {
return "CJK Compatibility";
} else {
return "CJK Unified Ideographs Extension A";
}
}
} else {
if(cp < 19968) {
return "Yijing Hexagram Symbols";
} else {
if(cp < 40960) {
return "CJK Unified Ideographs";
} else {
return "Yi Syllables";
}
}
}
}
} else {
if(cp < 42784) {
if(cp < 42560) {
if(cp < 42192) {
return "Yi Radicals";
} else {
if(cp < 42240) {
return "Lisu";
} else {
return "Vai";
}
}
} else {
if(cp < 42656) {
return "Cyrillic Extended-B";
} else {
if(cp < 42752) {
return "Bamum";
} else {
return "Modifier Tone Letters";
}
}
}
} else {
if(cp < 43072) {
if(cp < 43008) {
return "Latin Extended-D";
} else {
if(cp < 43056) {
return "Syloti Nagri";
} else {
return "Common Indic Number Forms";
}
}
} else {
if(cp < 43136) {
return "Phags-pa";
} else {
if(cp < 43232) {
return "Saurashtra";
} else {
return "Devanagari Extended";
}
}
}
}
}
}
} else {
if(cp < 65040) {
if(cp < 43888) {
if(cp < 43520) {
if(cp < 43360) {
if(cp < 43312) {
return "Kayah Li";
} else {
return "Rejang";
}
} else {
if(cp < 43392) {
return "Hangul Jamo Extended-A";
} else {
if(cp < 43488) {
return "Javanese";
} else {
return "Myanmar Extended-B";
}
}
}
} else {
if(cp < 43744) {
if(cp < 43616) {
return "Cham";
} else {
if(cp < 43648) {
return "Myanmar Extended-A";
} else {
return "Tai Viet";
}
}
} else {
if(cp < 43776) {
return "Meetei Mayek Extensions";
} else {
if(cp < 43824) {
return "Ethiopic Extended-A";
} else {
return "Latin Extended-E";
}
}
}
}
} else {
if(cp < 56320) {
if(cp < 55216) {
if(cp < 43968) {
return "Cherokee Supplement";
} else {
if(cp < 44032) {
return "Meetei Mayek";
} else {
return "Hangul Syllables";
}
}
} else {
if(cp < 55296) {
return "Hangul Jamo Extended-B";
} else {
if(cp < 56192) {
return "High Surrogates";
} else {
return "High Private Use Surrogates";
}
}
}
} else {
if(cp < 64256) {
if(cp < 57344) {
return "Low Surrogates";
} else {
if(cp < 63744) {
return "Private Use Area";
} else {
return "CJK Compatibility Ideographs";
}
}
} else {
if(cp < 64336) {
return "Alphabetic Presentation Forms";
} else {
if(cp < 65024) {
return "Arabic Presentation Forms-A";
} else {
return "Variation Selectors";
}
}
}
}
}
} else {
if(cp < 65936) {
if(cp < 65280) {
if(cp < 65072) {
if(cp < 65056) {
return "Vertical Forms";
} else {
return "Combining Half Marks";
}
} else {
if(cp < 65104) {
return "CJK Compatibility Forms";
} else {
if(cp < 65136) {
return "Small Form Variants";
} else {
return "Arabic Presentation Forms-B";
}
}
}
} else {
if(cp < 65664) {
if(cp < 65520) {
return "Halfwidth and Fullwidth Forms";
} else {
if(cp < 65536) {
return "Specials";
} else {
return "Linear B Syllabary";
}
}
} else {
if(cp < 65792) {
return "Linear B Ideograms";
} else {
if(cp < 65856) {
return "Aegean Numbers";
} else {
return "Ancient Greek Numbers";
}
}
}
}
} else {
if(cp < 66304) {
if(cp < 66176) {
if(cp < 66000) {
return "Ancient Symbols";
} else {
if(cp < 66048) {
return "Phaistos Disc";
} else {
return "";
}
}
} else {
if(cp < 66208) {
return "Lycian";
} else {
if(cp < 66272) {
return "Carian";
} else {
return "Coptic Epact Numbers";
}
}
}
} else {
if(cp < 66432) {
if(cp < 66352) {
return "Old Italic";
} else {
if(cp < 66384) {
return "Gothic";
} else {
return "Old Permic";
}
}
} else {
if(cp < 66464) {
return "Ugaritic";
} else {
if(cp < 66528) {
return "Old Persian";
} else {
return "";
}
}
}
}
}
}
}
}
} else {
if(cp < 75088) {
if(cp < 69840) {
if(cp < 68224) {
if(cp < 67680) {
if(cp < 66864) {
if(cp < 66688) {
if(cp < 66640) {
return "Deseret";
} else {
return "Shavian";
}
} else {
if(cp < 66736) {
return "Osmanya";
} else {
if(cp < 66816) {
return "Osage";
} else {
return "Elbasan";
}
}
}
} else {
if(cp < 67456) {
if(cp < 66928) {
return "Caucasian Albanian";
} else {
if(cp < 67072) {
return "";
} else {
return "Linear A";
}
}
} else {
if(cp < 67584) {
return "";
} else {
if(cp < 67648) {
return "Cypriot Syllabary";
} else {
return "Imperial Aramaic";
}
}
}
}
} else {
if(cp < 67872) {
if(cp < 67760) {
if(cp < 67712) {
return "Palmyrene";
} else {
return "Nabataean";
}
} else {
if(cp < 67808) {
return "";
} else {
if(cp < 67840) {
return "Hatran";
} else {
return "Phoenician";
}
}
}
} else {
if(cp < 68000) {
if(cp < 67904) {
return "Lydian";
} else {
if(cp < 67968) {
return "";
} else {
return "Meroitic Hieroglyphs";
}
}
} else {
if(cp < 68096) {
return "Meroitic Cursive";
} else {
if(cp < 68192) {
return "Kharoshthi";
} else {
return "Old South Arabian";
}
}
}
}
}
} else {
if(cp < 68864) {
if(cp < 68448) {
if(cp < 68288) {
if(cp < 68256) {
return "Old North Arabian";
} else {
return "";
}
} else {
if(cp < 68352) {
return "Manichaean";
} else {
if(cp < 68416) {
return "Avestan";
} else {
return "Inscriptional Parthian";
}
}
}
} else {
if(cp < 68608) {
if(cp < 68480) {
return "Inscriptional Pahlavi";
} else {
if(cp < 68528) {
return "Psalter Pahlavi";
} else {
return "";
}
}
} else {
if(cp < 68688) {
return "Old Turkic";
} else {
if(cp < 68736) {
return "";
} else {
return "Old Hungarian";
}
}
}
}
} else {
if(cp < 69424) {
if(cp < 69248) {
if(cp < 68928) {
return "Hanifi Rohingya";
} else {
if(cp < 69216) {
return "";
} else {
return "Rumi Numeral Symbols";
}
}
} else {
if(cp < 69312) {
return "Yezidi";
} else {
if(cp < 69376) {
return "";
} else {
return "Old Sogdian";
}
}
}
} else {
if(cp < 69600) {
if(cp < 69488) {
return "Sogdian";
} else {
if(cp < 69552) {
return "";
} else {
return "Chorasmian";
}
}
} else {
if(cp < 69632) {
return "Elymaic";
} else {
if(cp < 69760) {
return "Brahmi";
} else {
return "Kaithi";
}
}
}
}
}
}
} else {
if(cp < 71760) {
if(cp < 70656) {
if(cp < 70144) {
if(cp < 69968) {
if(cp < 69888) {
return "Sora Sompeng";
} else {
return "Chakma";
}
} else {
if(cp < 70016) {
return "Mahajani";
} else {
if(cp < 70112) {
return "Sharada";
} else {
return "Sinhala Archaic Numbers";
}
}
}
} else {
if(cp < 70320) {
if(cp < 70224) {
return "Khojki";
} else {
if(cp < 70272) {
return "";
} else {
return "Multani";
}
}
} else {
if(cp < 70400) {
return "Khudawadi";
} else {
if(cp < 70528) {
return "Grantha";
} else {
return "";
}
}
}
}
} else {
if(cp < 71264) {
if(cp < 70880) {
if(cp < 70784) {
return "Newa";
} else {
return "Tirhuta";
}
} else {
if(cp < 71040) {
return "";
} else {
if(cp < 71168) {
return "Siddham";
} else {
return "Modi";
}
}
}
} else {
if(cp < 71424) {
if(cp < 71296) {
return "Mongolian Supplement";
} else {
if(cp < 71376) {
return "Takri";
} else {
return "";
}
}
} else {
if(cp < 71488) {
return "Ahom";
} else {
if(cp < 71680) {
return "";
} else {
return "Dogra";
}
}
}
}
}
} else {
if(cp < 72816) {
if(cp < 72192) {
if(cp < 71936) {
if(cp < 71840) {
return "";
} else {
return "Warang Citi";
}
} else {
if(cp < 72032) {
return "Dives Akuru";
} else {
if(cp < 72096) {
return "";
} else {
return "Nandinagari";
}
}
}
} else {
if(cp < 72384) {
if(cp < 72272) {
return "Zanabazar Square";
} else {
if(cp < 72368) {
return "Soyombo";
} else {
return "";
}
}
} else {
if(cp < 72448) {
return "Pau Cin Hau";
} else {
if(cp < 72704) {
return "";
} else {
return "Bhaiksuki";
}
}
}
}
} else {
if(cp < 73472) {
if(cp < 73056) {
if(cp < 72896) {
return "Marchen";
} else {
if(cp < 72960) {
return "";
} else {
return "Masaram Gondi";
}
}
} else {
if(cp < 73136) {
return "Gunjala Gondi";
} else {
if(cp < 73440) {
return "";
} else {
return "Makasar";
}
}
}
} else {
if(cp < 73728) {
if(cp < 73648) {
return "";
} else {
if(cp < 73664) {
return "Lisu Supplement";
} else {
return "Tamil Supplement";
}
}
} else {
if(cp < 74752) {
return "Cuneiform";
} else {
if(cp < 74880) {
return "Cuneiform Numbers and Punctuation";
} else {
return "Early Dynastic Cuneiform";
}
}
}
}
}
}
}
} else {
if(cp < 123584) {
if(cp < 110592) {
if(cp < 93072) {
if(cp < 83584) {
if(cp < 78896) {
if(cp < 77824) {
return "";
} else {
return "Egyptian Hieroglyphs";
}
} else {
if(cp < 78912) {
return "Egyptian Hieroglyph Format Controls";
} else {
if(cp < 82944) {
return "";
} else {
return "Anatolian Hieroglyphs";
}
}
}
} else {
if(cp < 92784) {
if(cp < 92160) {
return "";
} else {
if(cp < 92736) {
return "Bamum Supplement";
} else {
return "Mro";
}
}
} else {
if(cp < 92880) {
return "";
} else {
if(cp < 92928) {
return "Bassa Vah";
} else {
return "Pahawh Hmong";
}
}
}
}
} else {
if(cp < 94176) {
if(cp < 93856) {
if(cp < 93760) {
return "";
} else {
return "Medefaidrin";
}
} else {
if(cp < 93952) {
return "";
} else {
if(cp < 94112) {
return "Miao";
} else {
return "";
}
}
}
} else {
if(cp < 101120) {
if(cp < 94208) {
return "Ideographic Symbols and Punctuation";
} else {
if(cp < 100352) {
return "Tangut";
} else {
return "Tangut Components";
}
}
} else {
if(cp < 101632) {
return "Khitan Small Script";
} else {
if(cp < 101776) {
return "Tangut Supplement";
} else {
return "";
}
}
}
}
}
} else {
if(cp < 119376) {
if(cp < 113664) {
if(cp < 110896) {
if(cp < 110848) {
return "Kana Supplement";
} else {
return "Kana Extended-A";
}
} else {
if(cp < 110960) {
return "Small Kana Extension";
} else {
if(cp < 111360) {
return "Nushu";
} else {
return "";
}
}
}
} else {
if(cp < 118784) {
if(cp < 113824) {
return "Duployan";
} else {
if(cp < 113840) {
return "Shorthand Format Controls";
} else {
return "";
}
}
} else {
if(cp < 119040) {
return "Byzantine Musical Symbols";
} else {
if(cp < 119296) {
return "Musical Symbols";
} else {
return "Ancient Greek Musical Notation";
}
}
}
}
} else {
if(cp < 120832) {
if(cp < 119648) {
if(cp < 119520) {
return "";
} else {
if(cp < 119552) {
return "Mayan Numerals";
} else {
return "Tai Xuan Jing Symbols";
}
}
} else {
if(cp < 119680) {
return "Counting Rod Numerals";
} else {
if(cp < 119808) {
return "";
} else {
return "Mathematical Alphanumeric Symbols";
}
}
}
} else {
if(cp < 122928) {
if(cp < 121520) {
return "Sutton SignWriting";
} else {
if(cp < 122880) {
return "";
} else {
return "Glagolitic Supplement";
}
}
} else {
if(cp < 123136) {
return "";
} else {
if(cp < 123216) {
return "Nyiakeng Puachue Hmong";
} else {
return "";
}
}
}
}
}
}
} else {
if(cp < 129024) {
if(cp < 126720) {
if(cp < 125280) {
if(cp < 124928) {
if(cp < 123648) {
return "Wancho";
} else {
return "";
}
} else {
if(cp < 125152) {
return "Mende Kikakui";
} else {
if(cp < 125184) {
return "";
} else {
return "Adlam";
}
}
}
} else {
if(cp < 126208) {
if(cp < 126064) {
return "";
} else {
if(cp < 126144) {
return "Indic Siyaq Numbers";
} else {
return "";
}
}
} else {
if(cp < 126288) {
return "Ottoman Siyaq Numbers";
} else {
if(cp < 126464) {
return "";
} else {
return "Arabic Mathematical Alphabetic Symbols";
}
}
}
}
} else {
if(cp < 127744) {
if(cp < 127136) {
if(cp < 126976) {
return "";
} else {
if(cp < 127024) {
return "Mahjong Tiles";
} else {
return "Domino Tiles";
}
}
} else {
if(cp < 127232) {
return "Playing Cards";
} else {
if(cp < 127488) {
return "Enclosed Alphanumeric Supplement";
} else {
return "Enclosed Ideographic Supplement";
}
}
}
} else {
if(cp < 128640) {
if(cp < 128512) {
return "Miscellaneous Symbols and Pictographs";
} else {
if(cp < 128592) {
return "Emoticons";
} else {
return "Ornamental Dingbats";
}
}
} else {
if(cp < 128768) {
return "Transport and Map Symbols";
} else {
if(cp < 128896) {
return "Alchemical Symbols";
} else {
return "Geometric Shapes Extended";
}
}
}
}
}
} else {
if(cp < 183984) {
if(cp < 130048) {
if(cp < 129536) {
if(cp < 129280) {
return "Supplemental Arrows-C";
} else {
return "Supplemental Symbols and Pictographs";
}
} else {
if(cp < 129648) {
return "Chess Symbols";
} else {
if(cp < 129792) {
return "Symbols and Pictographs Extended-A";
} else {
return "Symbols for Legacy Computing";
}
}
}
} else {
if(cp < 173824) {
if(cp < 131072) {
return "";
} else {
if(cp < 173792) {
return "CJK Unified Ideographs Extension B";
} else {
return "";
}
}
} else {
if(cp < 177984) {
return "CJK Unified Ideographs Extension C";
} else {
if(cp < 178208) {
return "CJK Unified Ideographs Extension D";
} else {
return "CJK Unified Ideographs Extension E";
}
}
}
}
} else {
if(cp < 917504) {
if(cp < 195104) {
if(cp < 191472) {
return "CJK Unified Ideographs Extension F";
} else {
if(cp < 194560) {
return "";
} else {
return "CJK Compatibility Ideographs Supplement";
}
}
} else {
if(cp < 196608) {
return "";
} else {
if(cp < 201552) {
return "CJK Unified Ideographs Extension G";
} else {
return "";
}
}
}
} else {
if(cp < 918000) {
if(cp < 917632) {
return "Tags";
} else {
if(cp < 917760) {
return "";
} else {
return "Variation Selectors Supplement";
}
}
} else {
if(cp < 983040) {
return "";
} else {
if(cp < 1048576) {
return "Supplementary Private Use Area-A";
} else {
return "Supplementary Private Use Area-B";
}
}
}
}
}
}
}
}
}
}
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_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);
}
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @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;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
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);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
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);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @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;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
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);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.8.0;
/**
* @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 {}
}
// File: unicode.sol
pragma solidity ^0.8.2;
/// @title Base64
/// @author Brecht Devos - <brecht@loopring.org>
/// @notice Provides a function for encoding some bytes in base64
library Base64 {
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;
}
}
contract UnicodeForGeeks is ERC721, Ownable {
constructor() ERC721("Unicode (for Geeks)", hex"efbfbd") {}
/**
* @dev Mints all the characters in `chars`. Reverts if any are already minted.
* @param to The address that should own the newly minted characters.
* @param chars The characters to mint.
*/
function mintAll(address to, string calldata chars) external {
for(uint256 offset = 0; offset < bytes(chars).length;) {
(uint256 codepoint, uint256 len) = charToCodepoint(chars, offset);
// Check the character is valid
require(bytes(UnicodeMap.codepointToBlock(codepoint)).length > 0, "Invalid character");
_safeMint(to, codepoint);
offset += len;
}
}
/**
* @dev Mints any of the characters in `chars` that are not already minted.
* @param to The address that should own the newly minted characters.
* @param chars The characters to mint.
*/
function mintAny(address to, string calldata chars) external {
for(uint256 offset = 0; offset < bytes(chars).length;) {
(uint256 codepoint, uint256 len) = charToCodepoint(chars, offset);
// Check the character is valid
require(bytes(UnicodeMap.codepointToBlock(codepoint)).length > 0, "Invalid character");
if(!_exists(codepoint)) {
_safeMint(to, codepoint);
}
offset += len;
}
}
/**
* @dev Reads the UTF-8 character starting at `offset` from `char`.
* @param char The string containing the chararacter to read.
* @param offset The offset to start reading at.
* @return codepoint The Unicode codepoint at `offset`.
* @return len The length in bytes of the unicode character just read.
*/
function charToCodepoint(string memory char, uint256 offset) public pure returns(uint256 codepoint, uint256 len) {
bytes memory ch = bytes(char);
if(ch[offset] & 0x80 == 0) {
require(ch.length >= offset + 1, "Invalid unicode chacter");
return (uint256(uint8(ch[offset])), 1);
}
if(ch[offset] & 0xE0 == 0xC0) {
require(ch.length >= offset + 2 && ch[offset + 1] & 0xC0 == 0x80, "Invalid unicode chacter");
return ((uint256(uint8(ch[offset] & 0x1F)) << 6) | uint256(uint8(ch[offset + 1] & 0x3F)), 2);
}
if(ch[offset] & 0xF0 == 0xE0) {
require(ch.length >= offset + 3 && ch[offset + 1] & 0xC0 == 0x80 && ch[offset + 2] & 0xC0 == 0x80, "Invalid unicode chacter");
return ((uint256(uint8(ch[offset] & 0x0F)) << 12) | (uint256(uint8(ch[offset + 1] & 0x3F)) << 6) | uint256(uint8(ch[offset + 2] & 0x3F)), 3);
}
if(ch[offset] & 0xF8 == 0xF0) {
require(ch.length >= offset + 4 && ch[offset + 1] & 0xC0 == 0x80 && ch[offset + 2] & 0xC0 == 0x80 && ch[offset + 3] & 0xC0 == 0x80, "Invalid unicode chacter");
return ((uint256(uint8(ch[offset] & 0x07)) << 18) | (uint256(uint8(ch[offset + 1] & 0x3F)) << 12) | (uint256(uint8(ch[offset + 2] & 0x3F)) << 6) | uint256(uint8(ch[offset + 3] & 0x3F)), 4);
}
revert("Invalid unicode chacter");
}
/**
* @dev Converts a Unicode codepoint into a single-character UTF-8 string.
* @param cp The codepoint to convert.
* @return The UTF-8 string.
*/
function codepointToChar(uint256 cp) public pure returns(string memory) {
if(cp <= 0x7F) {
bytes memory ret = new bytes(1);
ret[0] = bytes1(uint8(cp));
return string(ret);
}
if(cp <= 0x7FF) {
bytes memory ret = new bytes(2);
ret[0] = bytes1(uint8(0xC0 | (cp >> 6)));
ret[1] = bytes1(uint8(0x80 | (cp & 0x3F)));
return string(ret);
}
if(cp <= 0xFFFF) {
bytes memory ret = new bytes(3);
ret[0] = bytes1(uint8(0xE0 | (cp >> 12)));
ret[1] = bytes1(uint8(0x80 | ((cp >> 6) & 0x3F)));
ret[2] = bytes1(uint8(0x80 | (cp & 0x3F)));
return string(ret);
}
if(cp <= 0x10FFFF) {
bytes memory ret = new bytes(4);
ret[0] = bytes1(uint8(0xF0 | (cp >> 18)));
ret[1] = bytes1(uint8(0x80 | ((cp >> 12) & 0x3F)));
ret[2] = bytes1(uint8(0x80 | ((cp >> 6) & 0x3F)));
ret[3] = bytes1(uint8(0x80 | (cp & 0x3F)));
return string(ret);
}
revert("Invalid codepoint");
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory svgch = codepointToChar(tokenId);
string memory jsonch = svgch;
if(tokenId == 60) { // <
svgch = "<";
} else if(tokenId == 38) { // &
svgch = "&";
} else if(tokenId == 34) { // "
jsonch = '\\"';
}
string memory svg = string(abi.encodePacked('<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidyMid meet" viewBox="0 0 400 400"><style>.ch { text-anchor: middle; dominant-baseline: middle; fill: white; font-family: serif; font-size: 96px; }</style><rect width="100%" height="100%" fill="black" /><text x="200" y="200" class="ch">', svgch, '</text></svg>'));
string memory json = string(abi.encodePacked('{"name":"', jsonch, '","description":"The unicode character ', jsonch, '","attributes":[{"trait_type":"Character Type","value":"', UnicodeMap.codepointToBlock(tokenId) ,'"}],"image":"data:image/svg+xml;base64,', Base64.encode(bytes(svg)), '"}'));
return string(abi.encodePacked('data:application/json;base64,', Base64.encode(bytes(json))));
}
}设置
{
"compilationTarget": {
"UnicodeForGeeks.sol": "UnicodeForGeeks"
},
"evmVersion": "london",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 1
},
"remappings": []
}ABI
[{"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":[{"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":"string","name":"char","type":"string"},{"internalType":"uint256","name":"offset","type":"uint256"}],"name":"charToCodepoint","outputs":[{"internalType":"uint256","name":"codepoint","type":"uint256"},{"internalType":"uint256","name":"len","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"cp","type":"uint256"}],"name":"codepointToChar","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"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":"address","name":"to","type":"address"},{"internalType":"string","name":"chars","type":"string"}],"name":"mintAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"string","name":"chars","type":"string"}],"name":"mintAny","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":"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":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"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"}]