{"id":6062,"date":"2018-09-17T03:07:33","date_gmt":"2018-09-16T18:07:33","guid":{"rendered":"http:\/\/blog.jansnap.com\/?p=6062"},"modified":"2021-12-15T01:46:00","modified_gmt":"2021-12-14T16:46:00","slug":"cryptozombies%e3%81%a7%e5%be%97%e3%81%9f%e7%9f%a5%e8%ad%98%e5%89%8d%e5%8d%8a%e8%87%aa%e5%88%86%e7%94%a8%e3%83%a1%e3%83%a2","status":"publish","type":"post","link":"https:\/\/blog.jansnap.com\/?p=6062","title":{"rendered":"CryptoZombies\u3067\u5f97\u305f\u77e5\u8b58(\u524d\u534a)(\u81ea\u5206\u7528\u30e1\u30e2)"},"content":{"rendered":"<p>Solidity\u306e\u52c9\u5f37\u306e\u305f\u3081\u3001<a href=\"https:\/\/cryptozombies.io\/jp\/\" rel=\"nofollow noopener\" target=\"_blank\">CryptoZomibies<\/a>\u3092\u3084\u308a\u307e\u3057\u305f\u3002<br>\n\u5206\u304b\u308a\u3084\u3059\u3044\u65e5\u672c\u8a9e\u3067\u3044\u3044\u611f\u3058\u3067\u3059\u3002<br>\n\u5de6\u5074\u306e\u8aac\u660e\u6587\u3092\u8aad\u3093\u3060\u5f8c\u306b\u3001\u53f3\u5074\u306e\u30a8\u30c7\u30a3\u30bf\u306b\u5165\u529b\u3057\u3066\u307f\u3066\u3001\u7b54\u3048\u5408\u308f\u305b\u30dc\u30bf\u30f3\u3092\u62bc\u3059\u3068\u6b63\u3057\u3044\u304b\u5224\u65ad\u3057\u3066\u304f\u308c\u308b\u3068\u3044\u3046\u6d41\u308c\u3067\u3001\u30b9\u30e0\u30fc\u30ba\u306b\u5b66\u7fd2\u3067\u304d\u307e\u3059\u3002<br>\n\u30ec\u30c3\u30b9\u30f31\u304b\u30896\u307e\u3067\u3042\u308a\u3001\u30dc\u30ea\u30e5\u30fc\u30e0\u304c\u3042\u308a\u307e\u3059\u3002<br>\n<a href=\"https:\/\/solidity.readthedocs.io\/en\/develop\/index.html\" rel=\"nofollow noopener\" target=\"_blank\">Solidity\u306e\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u3082\u898b\u306a\u304c\u3089\u9032\u3081\u307e\u3057\u305f\u3002<\/p>\n\n<p>\u9577\u3044\u306e\u3067\u3001\u524d\u534a(\u30ec\u30c3\u30b9\u30f31-3)\u3068\u5f8c\u534a(\u30ec\u30c3\u30b9\u30f34-6)\u306b\u5206\u3051\u307e\u3057\u305f\u3002<\/p>\n\n<h2><span class=\"ez-toc-section\" id=\"%E3%83%AC%E3%83%83%E3%82%B9%E3%83%B31_%E3%82%BE%E3%83%B3%E3%83%93%E3%83%95%E3%82%A1%E3%82%AF%E3%83%88%E3%83%AA%E3%83%BC%E3%81%AE%E4%BD%9C%E6%88%90\"><\/span>\n\u30ec\u30c3\u30b9\u30f31:\u30be\u30f3\u30d3\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u306e\u4f5c\u6210<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<h3><span class=\"ez-toc-section\" id=\"%E5%A4%89%E6%95%B0\"><\/span>\n\u5909\u6570<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>\u5909\u6570\u306e\u3053\u3068\u3092\u72b6\u614b\u5909\u6570(state variable)\u3068\u547c\u3076\u3002<\/li>\n<li>\u5909\u6570\u5b9a\u7fa9\u306e<code>uint<\/code>\u306f<code>uint256<\/code>\u306e\u30a8\u30a4\u30ea\u30a2\u30b9\u3002\u4ed6\u306b<code>int<\/code>(\u7b26\u53f7\u4ed8\u304d)\u306a\u3069\u3082\u3042\u308b\u3002\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e<a href=\"https:\/\/solidity.readthedocs.io\/en\/develop\/types.html\" rel=\"nofollow noopener\" target=\"_blank\">Types<\/a>\u3092\u53c2\u7167\u3002<\/li>\n<li>\u69cb\u9020\u4f53\u3082\u3042\u308b\u3002\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e<a href=\"https:\/\/solidity.readthedocs.io\/en\/develop\/types.html#structs\" rel=\"nofollow noopener\" target=\"_blank\">Structs<\/a>\u3092\u53c2\u7167\u3002\u95a2\u6570\u306e\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059\u3053\u3068\u3082\u3067\u304d\u308b\u3002mapping\u3068\u306f\u9055\u3046\u306e\u3067\u6ce8\u610f\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"text\" class=\"language-text\">struct Person {\n  uint age;\n  string name;\n}<\/code><\/pre>\n\n\n\n<ul>\n<li>\u5909\u6570\u3092<code>public<\/code>\u3067\u5ba3\u8a00\u3059\u308b\u3068\u3001\u81ea\u52d5\u7684\u306bgetter\u304c\u7528\u610f\u3055\u308c\u308b\u3002<\/li>\n<li><p>\u5ba3\u8a00\u306e\u66f8\u304d\u65b9\u306f\u3001<code>Zombie[] public zombies;<\/code>\u306e\u3088\u3046\u306b\u3001\u578b\u540d\u3001public\u3001\u5909\u6570\u540d\u306e\u9806\u756a\u306a\u306e\u3067\u6ce8\u610f(public\u306f\u578b\u540d\u306e\u5f8c\uff09\u3002<\/p><\/li>\n<li><p>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3068\u533a\u5225\u3059\u308b\u305f\u3081\u3001\u95a2\u6570\u30d1\u30e9\u30e1\u30fc\u30bf\u5909\u6570\u540d\u306b\u306f\u3001\u982d\u306b\u30a2\u30f3\u30c0\u30fc\u30d0\u30fc<code>_<\/code>\u3092\u4ed8\u3051\u308b\u306e\u304c\u901a\u4f8b\u3002<\/p><\/li>\n<li><p>\u914d\u5217\u306e\u672b\u5c3e\u306b\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u306e\u306b\u3001<code>push()<\/code>\u3092\u4f7f\u3046\u3002<\/p><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"text\" class=\"language-text\">uint[] numbers;\nnumbers.push(5);\nnumbers.push(10);\nnumbers.push(15);\n\/\/ \u6570\u5b57\u306f [5, 10, 15]<\/code><\/pre>\n\n\n\n<ul>\n<li>\n<p>\u914d\u5217\u306e\u672b\u5c3e\u306b<code>push()<\/code>\u3067\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u3068\u3001\u623b\u308a\u5024\u3068\u3057\u3066\u3001\u8ffd\u52a0\u5f8c\u306e\u9577\u3055\u3092\u8fd4\u3059\u3002\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u300cArrays\u300d\u306e<a href=\"https:\/\/solidity.readthedocs.io\/en\/develop\/types.html#members\" rel=\"nofollow noopener\" target=\"_blank\">Members<\/a>\u3092\u53c2\u7167\u3002<\/p>\n\n<ul>\n<li>CryptoZombies\u3067\u306f\u300c\u65b0\u3057\u3044\u9577\u3055\u306euint\u914d\u5217\u3092\u8fd4\u3057\u300d\u3068\u3042\u308b\u304c\u3001\u66f8\u304f\u306a\u3089\u300c\u65b0\u3057\u3044\u914d\u5217\u306e\u9577\u3055\u3092unit\u3067\u8fd4\u3057\u300d\u3060\u3068\u601d\u3046\u3002<\/li>\n<\/ul>\n<\/li>\n<li><p>\u578b\u30ad\u30e3\u30b9\u30c8\u306f\u3001<code>uint8 c = a * uint8(b);<\/code>\u306e\u3088\u3046\u306b\u3001\u95a2\u6570\u3063\u307d\u304f\u66f8\u304f\u3002\u300c(uint8)b\u300d\u3067\u306f\u306a\u3044\u306e\u3067\u6ce8\u610f\u3002<\/p><\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"%E9%96%A2%E6%95%B0\"><\/span>\n\u95a2\u6570<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li><p>\u95a2\u6570\u306e\u516c\u958b\u7bc4\u56f2\u3002\u95a2\u6570\u3092\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u5185\u304b\u3089\u306e\u307f\u547c\u3073\u51fa\u305b\u308b\u3088\u3046\u306b\u3001\u95a2\u6570\u540d(\u5f15\u6570)\u306e\u5f8c\u308d\u306b<code>private<\/code>\u3092\u3064\u3051\u308b\u3002\u95a2\u6570\u540d\u306e\u982d\u306b\u30a2\u30f3\u30c0\u30fc\u30d0\u30fc<code>_<\/code>\u3092\u3064\u3051\u308b\u306e\u304c\u901a\u4f8b\u3002\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e<a href=\"https:\/\/solidity.readthedocs.io\/en\/develop\/contracts.html#visibility-and-getters\" rel=\"nofollow noopener\" target=\"_blank\">Visibility and Getters<\/a>\u3092\u53c2\u7167\u3002<\/p><\/li>\n<li><p>\u95a2\u6570\u306e\u623b\u308a\u5024\u306f\u3001<code>function sayHello() public returns (string) {<\/code>\u306e\u3088\u3046\u306b\u3001<code>returns (\u578b\u540d,...)<\/code>\u3092\u4ed8\u3051\u308b\u3002<\/p><\/li>\n<li>\n<p>\u95a2\u6570\u306e\u4fee\u98fe\u5b50\u3002<code>view<\/code>(\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u53d6\u308a\u3060\u3051)\u3001<code>pure<\/code>(\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u66f8\u304d\u3082\u3057\u306a\u3044)\u306a\u3069\u3002\u8a73\u7d30\u306f\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306eMiscellaneous\u306e<a href=\"https:\/\/solidity.readthedocs.io\/en\/develop\/miscellaneous.html#modifiers\" rel=\"nofollow noopener\" target=\"_blank\">Modifiers<\/a>\u3092\u53c2\u7167\u3002<\/p>\n\n<ul>\n<li>\u66f8\u304d\u9806\u306f<code>function _generateRandomDna(string _str) private view returns (uint) {<\/code> <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"%E3%83%8F%E3%83%83%E3%82%B7%E3%83%A5%E9%96%A2%E6%95%B0keccak256\"><\/span>\n\u30cf\u30c3\u30b7\u30e5\u95a2\u6570keccak256()\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li> \u30cf\u30c3\u30b7\u30e5\u95a2\u6570<code>keccak256()<\/code>\u306f\u3001\u6587\u5b57\u5217\u3092\u30e9\u30f3\u30c0\u30e0\u306a256\u30d3\u30c3\u30c8\u306e16\u9032\u6570\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3059\u308b\u3002\n\n<ul>\n<li>\u30cf\u30c3\u30b7\u30e5\u5316\u306e\u4ed6\u306b\u3001\u6587\u5b57\u5217\u6bd4\u8f03\u306b\u3082\u4f7f\u3046\u3002 <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"%E3%82%A4%E3%83%99%E3%83%B3%E3%83%88event\"><\/span>\n\u30a4\u30d9\u30f3\u30c8(event)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>\u30a4\u30d9\u30f3\u30c8\u3092\u4f7f\u3046\u3068\u3001\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u304b\u3089\u30a2\u30d7\u30ea\u306e\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9(JavaScript\u3068\u304b)\u306b\u60c5\u5831\u3092\u901a\u77e5\u3067\u304d\u308b\u3002 <\/li>\n<li>\u7279\u5b9a\u306e\u30a4\u30d9\u30f3\u30c8\u3092Listening\u3067\u304d\u308b\u3002\u30a4\u30d9\u30f3\u30c8\u304c\u767a\u751f\u3057\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u901a\u77e5\u3067\u304d\u308b\u3002\n\n<ul>\n<li>\u30d1\u30c3\u3068\u898b\u3067\u3001\u95a2\u6570(\u4f55\u304b\u51e6\u7406\u3092\u3059\u308b)\u3068\u3001\u30a4\u30d9\u30f3\u30c8(\u30d5\u30ed\u30f3\u30c8\u5074\u306b\u901a\u77e5\u3059\u308b)\u306e\u533a\u5225\u304c\u3064\u304d\u3065\u3089\u3044\u306e\u3067\u3001\u540d\u524d\u306f\u5de5\u592b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u305d\u3046\u3002(\u51e6\u7406\u3057\u305f\u3064\u3082\u308a\u304c\u30a4\u30d9\u30f3\u30c8\u901a\u77e5\u3060\u3051\u3060\u3063\u305f\u3068\u304b\u3042\u308a\u305d\u3046)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<p>(Solidity\u5074)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"text\" class=\"language-text\">\/\/ \u30a4\u30d9\u30f3\u30c8\u306e\u5ba3\u8a00\nevent IntegersAdded(uint x, uint y, uint result);\n\nfunction add(uint _x, uint _y) public {\n  uint result = _x + _y;\n  \/\/ \u95a2\u6570\u304c\u547c\u3070\u308c\u305f\u3053\u3068\u3092\u30a2\u30d7\u30ea\u306b\u4f1d\u3048\u308b\u305f\u3081\u306b\u30a4\u30d9\u30f3\u30c8\u3092\u767a\u751f\u3055\u305b\u308b\uff1a\n  IntegersAdded(_x, _y, result);\n  return result;\n}<\/code><\/pre>\n\n\n\n<p>(JavaScript\u5074)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"text\" class=\"language-text\">YourContract.IntegersAdded(function(error, result) { \n  \/\/ \u7d50\u679c\u306b\u3064\u3044\u3066\u4f55\u3089\u304b\u306e\u51e6\u7406\u3092\u3059\u308b\n});<\/code><\/pre>\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"%E3%81%9D%E3%81%AE%E4%BB%96\"><\/span>\n\u305d\u306e\u4ed6<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>\u5909\u6570\u540d\u306e<code>dnaModulus<\/code>\u3092dnaModules\u3068\u6253\u3061\u9593\u9055\u3044\u307e\u3057\u305f\u3002<\/li>\n<\/ul>\n\n<h2><span class=\"ez-toc-section\" id=\"%E3%83%AC%E3%83%83%E3%82%B9%E3%83%B32_%E3%82%BE%E3%83%B3%E3%83%93%E3%81%8C%E4%BA%BA%E9%96%93%E3%82%92%E8%A5%B2%E3%81%86\"><\/span>\n\u30ec\u30c3\u30b9\u30f32:\u30be\u30f3\u30d3\u304c\u4eba\u9593\u3092\u8972\u3046<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<ul>\n<li>\n<p>mapping\u30fb\u30fb\u30fb\u30ad\u30fc\u30d0\u30ea\u30e5\u30fc\u30b9\u30c8\u30a2\u3002\u9023\u60f3\u914d\u5217\u306e\u3053\u3068\u3002<a href=\"https:\/\/solidity.readthedocs.io\/en\/develop\/types.html#mappings\" rel=\"nofollow noopener\" target=\"_blank\">mapping<\/a>\u3002<\/p>\n\n<ul>\n<li>\n<code>mapping (uint => string) userIdToName;<\/code>\u306e\u3088\u3046\u306b<code>mapping (\u30ad\u30fc\u306e\u578b => \u30d0\u30ea\u30e5\u30fc\u306e\u578b) \u30de\u30c3\u30d4\u30f3\u30b0\u540d<\/code>\u3068\u66f8\u304f\u3002<\/li>\n<li>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001<code>userIdToName[id]<\/code>\u306e\u3088\u3046\u306b\u3001uint\u578b\u3092\u6e21\u3059\u3068\u3001string\u578b\u304c\u8fd4\u3063\u3066\u304f\u308b\u3002<\/li>\n<li>\u914d\u5217\u3068\u540c\u3058\u306a\u306e\u3067\u3001\u4e38\u30ab\u30c3\u30b3\u3067\u306f\u306a\u304f\u89d2\u30ab\u30c3\u30b3<code>[ ]<\/code>\u306a\u306e\u3067\u6ce8\u610f\u3002<\/li>\n<\/ul>\n<\/li>\n<li><p>address\u578b\u30fb\u30fb\u30fb\u30a4\u30fc\u30b5\u30ea\u30a2\u30e0\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\uff1f<\/p><\/li>\n<li><p>msg.sender\u30fb\u30fb\u30fb\u305d\u306e\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u305f\u30e6\u30fc\u30b6(\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u306e\u5834\u5408\u3082\u3042\u308b)\u306e\u30a2\u30c9\u30ec\u30b9(address\u578b)\u3002<a href=\"https:\/\/solidity.readthedocs.io\/en\/develop\/miscellaneous.html#global-variables\" rel=\"nofollow noopener\" target=\"_blank\">\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570<\/a>\u3002<\/p><\/li>\n<li><p>require(\u6761\u4ef6\u5f0f)\u30fb\u30fb\u30fb\u6761\u4ef6\u304c\u63c3\u308f\u306a\u3044\u5834\u5408\u306f\u3001\u30a8\u30e9\u30fc\u3092\u51fa\u3057\u3066\u51e6\u7406\u3092\u4e2d\u65ad\u3059\u308b\u3002if\u6587\u3067\u4e2d\u65ad\u3055\u305b\u308b\u3088\u308a\u5206\u304b\u308a\u3084\u3059\u3044\u3002<\/p><\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"%E7%B6%99%E6%89%BF\"><\/span>\n\u7d99\u627f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li><p><code>contract BabyDoge is Doge { }<\/code>\u306e\u3088\u3046\u306b\u3001\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u540d\u306e\u5f8c\u308d\u306b<code>is<\/code>\u3092\u4f7f\u3046\u3002<\/p><\/li>\n<li>\n<p>import\u30fb\u30fb\u30fb\u5225\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u3002<\/p>\n\n<ul>\n<li><code>import \".\/zombiefactory.sol\";<\/code><\/li>\n<li>\n<code>import \"somepackage\/SomeContract.sol\";<\/code>\u306e\u3088\u3046\u306b\u3001npm\u3068\u304b\u3067\u5165\u308c\u305f\u5916\u90e8\u30d1\u30c3\u30b1\u30fc\u30b8\u3082\u8aad\u307f\u8fbc\u3081\u308b\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"%E3%82%B9%E3%83%88%E3%83%AC%E3%83%BC%E3%82%B8vs%E3%83%A1%E3%83%A2%E3%83%AA\"><\/span>\n\u30b9\u30c8\u30ec\u30fc\u30b8vs\u30e1\u30e2\u30ea<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>\u5909\u6570\u306e\u683c\u7d0d\u5834\u6240\u306b\u306f\u3001<code>storage<\/code>\u3068<code>memory<\/code>\u304c\u3042\u308b\u3002\n\n<ul>\n<li>storage\u306f\u6c38\u7d9a\u7684\u3002<\/li>\n<li>memory\u306f\u4e00\u6642\u7684\u3002<\/li>\n<li>\u5909\u6570\u5ba3\u8a00\u6642\u306b<code>Zombie storage myZombie;<\/code>\u306e\u3088\u3046\u306b\u3001<code>\u578b\u540d \u683c\u7d0d\u5834\u6240 \u5909\u6570\u540d<\/code>\u3067\u6307\u5b9a\u3059\u308b\u3002<\/li>\n<li>\u660e\u793a\u3057\u306a\u3044\u3068\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u81ea\u52d5\u3067\u5224\u65ad\u3057\u3066\u304f\u308c\u308b(\u3042\u3084\u3057\u3044\u6642\u306fwarning\u304c\u51fa\u308b)<\/li>\n<li>(chapter7\u306f\u3001_zombieId\u304czombies[]\u306e\u6dfb\u5b57\u306b\u306a\u308b\u3002\u521d\u56de\u306f\u5206\u304b\u3089\u306a\u304b\u3063\u305f\u306e\u3067\u5f8c\u3067\u5fa9\u7fd2\u3057\u3066\u304a\u304f)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"%E5%88%A5%E3%81%AE%E9%96%A2%E6%95%B0%E3%81%A8%E3%83%93%E3%82%B8%E3%83%93%E3%83%AA%E3%83%86%E3%82%A3%E5%8F%AF%E8%A6%96%E6%80%A7%E4%BF%AE%E9%A3%BE%E5%AD%90\"><\/span>\n\u5225\u306e\u95a2\u6570\u3068\u30d3\u30b8\u30d3\u30ea\u30c6\u30a3(\u53ef\u8996\u6027\u4fee\u98fe\u5b50)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>Solidity\u306b\u306fpublic \u3068private\u306e\u4ed6\u306b\u3001internal \u3068 external\u3068\u3044\u3046\u95a2\u6570\u7528\u306e\u30d3\u30b8\u30d3\u30ea\u30c6\u30a3\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u308b\u3002\n\n<ul>\n<li>internal\u306fprivate\u3068\u540c\u3058\u3060\u304c\u3001\u3053\u306e\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u304b\u3089\u7d99\u627f\u3057\u305f\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u306b\u3082\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3002 <\/li>\n<li>external\u306f\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u5916\u304b\u3089\u306e\u307f\u547c\u3073\u51fa\u305b\u308b\u3002<\/li>\n<li>public\u306f\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u5185\u5916\u304b\u3089\u547c\u3073\u51fa\u305b\u308b\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"%E5%88%A5%E3%81%AA%E3%82%B3%E3%83%B3%E3%83%88%E3%83%A9%E3%82%AF%E3%83%88%E3%81%A8%E3%81%AE%E3%82%84%E3%82%8A%E3%81%A8%E3%82%8A\"><\/span>\n\u5225\u306a\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3068\u306e\u3084\u308a\u3068\u308a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u4e0a\u306e\u5225\u306a\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u5185\u306e\u5909\u6570\u3084\u95a2\u6570\u3092\u4f7f\u3048\u308b\u3002<\/li>\n<li>\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u5b9a\u7fa9\u3092\u4f7f\u3046\u3002\n\n<ul>\n<li>\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092\u66f8\u3044\u3066\u3001\u4e2d\u306b\u306f\u95a2\u6570\u306e\u578b\u3060\u3051\u5b9a\u7fa9\u3057\u3066\u3001\u4e2d\u8eab\u306e{}\u3092\u66f8\u304b\u305a\u306b;\u3067\u7d42\u308f\u308b\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"text\" class=\"language-text\">contract NumberInterface {\n  function getNum(address _myAddress) public view returns (uint);\n}<\/code><\/pre>\n\n\n\n<ul>\n<li>\u4f7f\u3046\u6642\u306f\u3001\u30c7\u30d7\u30ed\u30a4\u3055\u308c\u305f\u6642\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u6e21\u3057\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3059\u308b\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"text\" class=\"language-text\">NumberInterface n = NumberInterface(0x38ea...);\nn.getNum(msg.sender);<\/code><\/pre>\n\n\n\n<h2><span class=\"ez-toc-section\" id=\"%E3%83%AC%E3%83%83%E3%82%B9%E3%83%B33_Solidity%E3%81%AE%E9%AB%98%E5%BA%A6%E3%81%AA%E3%82%B3%E3%83%B3%E3%82%BB%E3%83%97%E3%83%88\"><\/span>\n\u30ec\u30c3\u30b9\u30f33:Solidity\u306e\u9ad8\u5ea6\u306a\u30b3\u30f3\u30bb\u30d7\u30c8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<ul>\n<li>\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092\u30a4\u30fc\u30b5\u30ea\u30a2\u30e0\u4e0a\u306b\u30c7\u30d7\u30ed\u30a4\u3059\u308b\u3068\u3001\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306b\u306a\u308b\u3002\u3064\u307e\u308a\u7de8\u96c6\u3082\u66f4\u65b0\u3082\u3067\u304d\u306a\u304f\u306a\u308b\u3068\u3044\u3046\u3053\u3068\u3002<\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"%E5%A4%96%E9%83%A8%E3%81%AE%E3%82%B3%E3%83%B3%E3%83%88%E3%83%A9%E3%82%AF%E3%83%88%E3%81%AB%E4%BE%9D%E5%AD%98%E3%81%99%E3%82%8B%E3%82%B3%E3%83%B3%E3%83%88%E3%83%A9%E3%82%AF%E3%83%88\"><\/span>\n\u5916\u90e8\u306e\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u306b\u4f9d\u5b58\u3059\u308b\u30b3\u30f3\u30c8\u30e9\u30af\u30c8<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>\u578b\u3068\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u306e\u30c7\u30d7\u30ed\u30a4\u5148\u30a2\u30c9\u30ec\u30b9\u3092\u6307\u5b9a\u3057\u3066\u3001\u5916\u90e8\u306e\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3002<\/li>\n<li>\u4f9d\u5b58\u5148\u306e\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u304c\u30d0\u30b0\u306a\u3069\u3067\u66f8\u304d\u63db\u308f\u3063\u3066\u3082\u3001\u30a2\u30c9\u30ec\u30b9\u3092\u5909\u3048\u308c\u3070\u65b0\u3057\u3044\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3067\u304d\u308b\u3002<\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"modifier%E4%BF%AE%E9%A3%BE%E5%AD%90\"><\/span>\nmodifier\u4fee\u98fe\u5b50<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li><p>OpenZeppelin\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u63d0\u4f9b\u3059\u308b<code>Ownable<\/code>\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092\u4f8b\u306b\u3057\u3066\u8aac\u660e\u3057\u3066\u3044\u308b\u3002<\/p><\/li>\n<li><p><code>modifier<\/code>\u4fee\u98fe\u5b50\u3002\u95a2\u6570\u307f\u305f\u3044\u306a\u3082\u306e\u3002\u4f8b\u3067\u306f<code>modifier onlyOwner{...}<\/code>\u3067\u3001\u30c7\u30d7\u30ed\u30a4\u3057\u305f\u30a2\u30ab\u30a6\u30f3\u30c8\u3060\u3051\u304c\u4f7f\u3048\u308b\u3088\u3046\u306a\u4fee\u98fe\u5b50\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u3002<\/p><\/li>\n<li><p>\u4f7f\u3044\u65b9\u306f\u3001\u95a2\u6570\u5ba3\u8a00\u306e\u6700\u5f8c\u306b\u4fee\u98fe\u5b50\u3092\u3064\u3051\u308b\u3002\u4f8b\uff1a<code>function likeABoss() external onlyOwner {<\/code>\u3002<\/p><\/li>\n<li>\n<p>\u5b9f\u884c\u6642\u306f\u3001\u5148\u306bmodifier\u304c\u547c\u3070\u308c\u3001modifier\u306e\u4e2d\u306e<code>_;<\/code>\u304c\u547c\u3070\u308c\u308b\u3068\u3001\u5143\u306e\u95a2\u6570\u304c\u5b9f\u884c\u3055\u308c\u308b\u3002<\/p>\n\n<ul>\n<li>\u95a2\u6570\u306e\u5b9f\u884c\u524d\u306b\u3001require\u3067\u6a29\u9650\u30c1\u30a7\u30c3\u30af\u3059\u308b\u6642\u306b\u3001\u7c21\u5358\u306b\u66f8\u3051\u308b\u3002<\/li>\n<\/ul>\n<\/li>\n<li><p>DApps\u3092\u66f8\u304f\u6642\u306b\u3001\u30aa\u30fc\u30ca\u30fc\u304c\u306a\u3093\u3067\u3082\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3068\u3001\u30aa\u30fc\u30ca\u30fc\u304c\u30d0\u30c3\u30af\u30c9\u30a2\u3092\u4ed5\u8fbc\u3093\u3060\u308a\u3067\u304d\u3066\u3057\u307e\u3046\u306e\u3067\u3001\u3069\u308c\u3060\u3051\u6a29\u9650\u3092\u4e0e\u3048\u308b\u304b\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u8003\u3048\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p><\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"%E5%BC%95%E6%95%B0%E3%82%92%E6%8C%81%E3%81%A4%E9%96%A2%E6%95%B0%E4%BF%AE%E9%A3%BE%E5%AD%90modifier\"><\/span>\n\u5f15\u6570\u3092\u6301\u3064\u95a2\u6570\u4fee\u98fe\u5b50(modifier)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"text\" class=\"language-text\">\/\/ \u4e00\u5b9a\u306e\u5e74\u9f62\u3088\u308a\u30e6\u30fc\u30b6\u30fc\u306e\u5e74\u9f62\u304c\u9ad8\u3044\u3053\u3068\u3092\u8981\u4ef6\u3068\u3059\u308b\u4fee\u98fe\u5b50\u3060\uff1a\nmodifier olderThan(uint _age, uint _userId) {\n  require (age[_userId] >= _age);\n  _;\n}<\/code><\/pre>\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"%E3%82%AC%E3%82%B9gas_%E7%87%83%E6%96%99\"><\/span>\n\u30ac\u30b9(gas, \u71c3\u6599)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>\u95a2\u6570\u306e\u5b9f\u884c\u306b\u306fgas\u304c\u5fc5\u8981\u3002\u5b9f\u884c\u306b\u5fc5\u8981\u306a\u8a08\u7b97\u6a5f\u8cc7\u6e90\u306b\u3088\u3063\u3066gas\u4ee3\u304c\u5909\u308f\u308b\u3002\n\n<ul>\n<li>\u95a2\u6570\u306e\u72b6\u614b\u4fee\u98fe\u5b50\u306b\u3001<code>view<\/code>\u3068<code>pure<\/code>\u304c\u3042\u308b\u3002<\/li>\n<li>\n<code>view<\/code>\u306e\u95a2\u6570\u306f\u3001gas\u4ee3\u304c\u304b\u304b\u3089\u306a\u3044(\u30c7\u30fc\u30bf\u3092\u53c2\u7167\u3059\u308b\u3060\u3051\u3060\u304b\u3089)\u3002<\/li>\n<li>\n<code>pure<\/code>\u306e\u95a2\u6570\u3082\u3001gas\u4ee3\u304c\u304b\u304b\u3089\u306a\u3044(\u3053\u3061\u3089\u306f\u53c2\u7167\u3082\u3057\u306a\u3044)\u3002<\/li>\n<li>storage\u3078\u306e\u66f8\u304d\u8fbc\u307f\u306f\u3001\u9ad8\u3044gas\u4ee3\u304c\u304b\u304b\u308b\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u69cb\u9020\u4f53(struct)\u306e\u4e2d\u3067\u306f\u3001\u3067\u304d\u308b\u3060\u3051\u5c0f\u3055\u3044uint\u3092\u4f7f\u3046\u3068\u3001gas\u4ee3\u306e\u7bc0\u7d04\u306b\u306a\u308b\u3002\n\n<ul>\n<li>\u4f8b\u3048\u3070\u3001<code>uint<\/code>\u3088\u308a\u3082<code>uint32<\/code>\u306e\u65b9\u304cgas\u4ee3\u304c\u5b89\u304f\u3066\u3059\u3080\u3002<\/li>\n<li>\u540c\u3058\u578b\u306e\u5909\u6570\u3092\u96a3\u308a\u5408\u308f\u305b\u3066\u66f8\u304f\u306e\u3082gas\u4ee3\u3092\u5b89\u304f\u3067\u304d\u308b\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5fc5\u8981\u306a\u6642\u4ee5\u5916\u306f<code>storage<\/code>\u5909\u6570\u306b\u5024\u3092\u66f8\u304d\u8fbc\u307e\u306a\u3044\u3088\u3046\u306b\u3001<code>memory<\/code>\u5909\u6570\u306b\u914d\u5217\u3092\u518d\u751f\u6210\u3059\u308b\u3084\u308a\u65b9\u304c\u91cd\u8981\u3002<\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"Time_units\"><\/span>\nTime units<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>\n<code>now<\/code>\u5909\u6570\u3067\u3001\u73fe\u5728\u6642\u523b\u3092unixtime(\u79d2)\u3067\u53d6\u5f97\u3067\u304d\u308b\u3002uint\u578b(uint256\u578b)\u306a\u306e\u3067\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u578b\u30ad\u30e3\u30b9\u30c8\u3059\u308b\u3002<\/li>\n<li>seconds\u3001 minutes\u3001 hours\u3001 days\u3001weeks \u3001years\u3068\u3044\u3046\u5358\u4f4d\u304c\u3042\u308a\u3001uint\u578b\u306e\u79d2\u306b\u5909\u63db\u3055\u308c\u308b\u3002<\/li>\n<li>\u4f8b\u3067\u306f\u3001readyTime\u5909\u6570\u3067\u6355\u98df\u306e\u9593\u9694\u3092\u5236\u9650\u3057\u3066\u3044\u308b\u3002<\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"%E6%A7%8B%E9%80%A0%E4%BD%93%E3%81%AE%E3%83%9D%E3%82%A4%E3%83%B3%E3%82%BF%EF%BC%9F%EF%BC%9F\"><\/span>\n\u69cb\u9020\u4f53\u306e\u30dd\u30a4\u30f3\u30bf\uff1f\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>\n<code>function _triggerCooldown(Zombie storage _zombie) internal {<\/code>\u306e\u3088\u3046\u306b\u3001\u5f15\u6570\u306bstorage\u3092\u6307\u5b9a\u3067\u304d\u308b\u3002\n\n<ul>\n<li>\u300c\u30dd\u30a4\u30f3\u30bf\u300d\u3068\u3042\u308b\u304c\u3001\u30a2\u30c9\u30ec\u30b9\u6e21\u3057\u306e\u4e8b\u306a\u306e\u304b\u4e0d\u660e\u3002\u3002\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"public%E9%96%A2%E6%95%B0%E3%81%A8%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3\"><\/span>\npublic\u95a2\u6570\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>(\u30c1\u30e3\u30d7\u30bf\u30fc7\u306e\u300c\u307e\u305amyZombie\u3092\u53c2\u7167\u3057\u305f\u3042\u3068\u3001\u300d\u3068\u3044\u3046\u6587\u304c\u4f55\u3092\u6307\u3057\u3066\u3044\u308b\u306e\u304b\u5206\u304b\u3089\u306a\u3044)<\/li>\n<\/ul>\n\n<h3><span class=\"ez-toc-section\" id=\"memory%E3%81%A7%E5%A4%89%E6%95%B0%E3%82%92%E5%AE%A3%E8%A8%80%E3%81%97%E3%81%A6%E4%BD%BF%E3%81%86\"><\/span>\nmemory\u3067\u5909\u6570\u3092\u5ba3\u8a00\u3057\u3066\u4f7f\u3046<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>\n<code>storage<\/code>\u3092\u4f7f\u308f\u306a\u3044\u3067\u3059\u3080\u3088\u3046\u306b\u3001<code>memory<\/code>\u3067\u5909\u6570\u3092\u5ba3\u8a00\u3057\u3066\u4f7f\u3046\u3002\n\n<ul>\n<li>\u914d\u5217\u306e\u5834\u5408\u306f\u3001\u5fc5\u305a\u9577\u3055\u3092\u6307\u5b9a\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<code>new<\/code>\u3092\u4f7f\u3046\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"text\" class=\"language-text\">  \/\/ \u9577\u30553\u306e\u65b0\u3057\u3044\u914d\u5217\u3092\u30e1\u30e2\u30ea\u5185\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3059\u308b\n  uint[] memory values = new uint[](3);<\/code><\/pre>\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"for%E6%96%87%E3%81%AE%E6%9B%B8%E3%81%8D%E6%96%B9\"><\/span>\nfor\u6587\u306e\u66f8\u304d\u65b9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"text\" class=\"language-text\">for (uint i = 0; i < zombies.length; i++) {\n  if (zombieToOwner[i] == _owner) {\n    result[counter] = i;\n     counter++;\n  }\n}<\/code><\/pre>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Solidity\u306e\u52c9\u5f37\u306e\u305f\u3081\u3001<a href=\"https:\/\/cryptozombies.io\/jp\/\" rel=\"nofollow noopener\" target=\"_blank\">CryptoZomibies<\/a>\u3092\u3084\u308a\u307e\u3057\u305f\u3002<br \/>\n  \u5206\u304b\u308a\u3084\u3059\u3044\u65e5\u672c\u8a9e\u3067\u3044\u3044\u611f\u3058\u3067\u3059\u3002<br \/>\n  \u5de6\u5074\u306e\u8aac\u660e\u6587\u3092\u8aad\u3093\u3060\u5f8c\u306b\u3001\u53f3\u5074\u306e\u30a8\u30c7\u30a3\u30bf\u306b\u5165\u529b\u3057\u3066\u307f\u3066\u3001\u7b54\u3048\u5408\u308f\u305b\u30dc\u30bf\u30f3\u3092\u62bc\u3059\u3068\u6b63\u3057\u3044\u304b\u5224\u65ad\u3057\u3066\u304f\u308c\u308b\u3068\u3044\u3046\u6d41\u308c\u3067\u3001\u30b9\u30e0\u30fc\u30ba\u306b\u5b66\u7fd2\u3067\u304d\u307e\u3059\u3002<br \/>\n  \u30ec\u30c3\u30b9\u30f31\u304b\u30896\u307e\u3067\u3042\u308a\u3001\u30dc\u30ea\u30e5\u30fc\u30e0\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n  <a href=\"https:\/\/solidity.readthedocs.io\/en\/develop\/index.html\" rel=\"nofollow noopener\" target=\"_blank\">Solidity\u306e\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u3082\u898b\u306a\u304c\u3089\u9032\u3081\u307e\u3057\u305f\u3002\n<\/p>\n<p>\u9577\u3044\u306e\u3067\u3001\u524d\u534a(\u30ec\u30c3\u30b9\u30f31-3)\u3068\u5f8c\u534a(\u30ec\u30c3\u30b9\u30f34-6)\u306b\u5206\u3051\u307e\u3057\u305f\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4223,4222],"tags":[4221,4220],"class_list":["post-6062","post","type-post","status-publish","format-standard","hentry","category-cryptozombies","category-solidity","tag-cryptozombies","tag-solidity"],"_links":{"self":[{"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=\/wp\/v2\/posts\/6062","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6062"}],"version-history":[{"count":0,"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=\/wp\/v2\/posts\/6062\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6062"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6062"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6062"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}