# 完全なオンチェーンNFT

完全オンチェーンNFTは、通常のトークンとは異なり、ファイルが[IPFS](https://docs.nmkr.io/introduction/what-is-ipfs)上にあり、メタデータでNFTにリンクされているNFTです。NMKR Studioでは、[ファイルをBase64としてメタデータに](https://docs.nmkr.io/nmkr-studio/token/metadata/add-token-specific-metadata)追加することで、このような完全オンチェーンNFTをミントすることもできます。Base64エンコーディング方式は、バイナリデータをASCIIテキストでエンコードするために使用されます。主に画像、音声ファイル、その他のメディアの保存や転送に使用されます。

{% hint style="warning" %}
これらのタイプのアセットをミントする際には、Cardanoの現在のメタデータファイルのサイズ制限である16kbに留意してください。空白を含む各文字は1バイトとしてカウントされるため、通常、1回の取引で販売できるNFTは1つだけです。
{% endhint %}

通常、トークンのメタデータにはIPFSリンク（"ipfs\://qmudas..."）で画像がリンクされているため、完全にオンチェーンなNFTの場合はBase64エンコードしたNFTに画像やその他のメディアファイルを追加することになります。

```json
            "src": [
              "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAlYAAAJWCAYAAACapc",
              "kfAAAM5UlEQVR4nO3YMYveVR6G4czyR0ewUNSdURLSpBAsBAe02cg2FltYCIKQXk",
              .....
              "SEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBA5FdySWoe28",
              "2w6gAAAABJRU5ErkJggg=="
            ]
```

{% hint style="warning" %}
あなたの文字列は、Cardanoに適合させるために、各行に63文字しか含まない配列に変換されなければならないことに注意してください。
{% endhint %}

**ファイルセクションのBase64：**

メタデータのfilesセクションにbase64エンコードされたメディアファイルを追加して、メインファイルをbase64に設定することができます。

```json
"files": [
          {
            "mediaType": "image/png",
            "name": "tokenname",
            "src": [
              "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAlYAAAJWCAYAAACapc",
              "kfAAAM5UlEQVR4nO3YMYveVR6G4czyR0ewUNSdURLSpBAsBAe02cg2FltYCIKQXk",
              ....
              "SEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBA5FdySWoe28",
              "2w6gAAAABJRU5ErkJggg=="
            ]
```

**画像としてBase64：**

また、base64エンコードした画像を縮小したものをサムネイルとして追加することもできます。

```json

        "image": [
          "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAATgAAAE4CAYAAADPf+",
          "9qAAAGFUlEQVR4nO3dvauWdRjAcU9IGTQUvZihtDQEDkFBLSktDg0NQRC4R52iGq",.....          "1bn3uI/9vut6JTHd51ee4RNjj00oNzj7DQvvvg9NwjXJdlu3W1wQFZAgdkCRyQJX",
          "BAlsABWQIHZAkckCVwQJbAAVkCB2QJHJD1L4cNZ+LMYCADAAAAAElFTkSuQmCC"
        ],
        "mediaType": "image/png",
        "name": "tokenname"
```

**完全なオンチェーンNFTのメタデータ例**

以下のコードは、base64エンコードされた画像をサムネイルとして使用し、filesectionのmainfileも使用する、完全にオンチェインのNFTの例です。

<pre class="language-json"><code class="lang-json">{
  "721": {
    "684ffa75d83ccd4dfe179bd37fe679e74d33cce181a6f473337df098": {
      "hunk0030": {
        "Base": "Tan",
        "Cigarette": "None",
        "Earring": "None",
        "Eyes": "Shades (yellow)",
        "Facial Hair": "None",
        "Hair": "Swirl (black)",
        "Headwear": "None",
        "Mouth": "Lips",
        "Top": "Turtleneck (rust)",
        "Top Secondary": "Chain",
        "files": [
          {
            "mediaType": "image/png",
            "name": "hunk0030",
            "src": [
              "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAlYAAAJWCAYAAACapc",
              "kfAAAM5UlEQVR4nO3YMYveVR6G4czyR0ewUNSdURLSpBAsBAe02cg2FltYCIKQXk",
              "yUaCHaCIILFrtWWdlVV2zCNopgIwjRIjhWagJ+hBAxBlMIWmghsVeLMHufnHnzXt",
              "cH+PEUp7g5GydOn7l6AACA/9ufZg8AALhRCCsAgIiwAgCICCsAgIiwAgCICCsAgI",
              "iwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAg",
              "CICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICC",
              "sAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgI",
              "iwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAg",
              "CICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICC",
              "sAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgI",
              "iwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAg",
              "CICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICC",
              "sAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgI",
              "iwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAg",
              "CICCsAgMgyewCMdPbVp2dP2JODm1dmT4Bhjjz/3uwJMIwfKwCAiLACAIgIKwCAiL",
              "ACAIgIKwCAiLACAIgIKwCAiLACAIgIKwCAiLACAIgIKwCAiLACAIgIKwCAiLACAI",
              "gIKwCAiLACAIgIKwCAiLACAIgIKwCAiLACAIgIKwCAiLACAIhsnDh95ursEay3s6",
              "8+PXvCWjm4eWX2BBjmyPPvzZ7AmvNjBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAAB",
              "FhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQ",
              "AQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEV",
              "YAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAAB",
              "FhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQWWYPAK6vr3+6c9jtg5tXht",
              "0GWAV+rAAAIsIKACAirAAAIsIKACAirAAAIsIKACAirAAAIsIKACAirAAAIsIKAC",
              "AirAAAIsIKACAirAAAIsIKACAirAAAIsIKACAirAAAIsIKACAirAAAIsIKACAirA",
              "AAIsIKACCyzB4A3DhOPnjX7Al78vrn382esFZGvpOPhl2Ga+PHCgAgIqwAACLCCg",
              "AgIqwAACLCCgAgIqwAACLCCgAgIqwAACLCCgAgIqwAACLCCgAgIqwAACLCCgAgIq",
              "wAACLCCgAgIqwAACLCCgAgIqwAACLCCgAgIqwAACLCCgAgIqwAACLL7AHA9fWPhz",
              "dmT9h3Tj5417Dbr3/+3bDbwP7jxwoAICKsAAAiwgoAICKsAAAiwgoAICKsAAAiwg",
              "oAICKsAAAiwgoAICKsAAAiwgoAICKsAAAiwgoAICKsAAAiwgoAICKsAAAiwgoAIC",
              "KsAAAiwgoAICKsAAAiwgoAICKsAAAiy+wBwO/tbG8Nu/3GV1eH3b7vzz8Mu72q7j",
              "90aPaEfefTS7MXwDh+rAAAIsIKACAirAAAIsIKACAirAAAIsIKACAirAAAIsIKAC",
              "AirAAAIsIKACAirAAAIsIKACAirAAAIsIKACAirAAAIsIKACAirAAAIsIKACAirA",
              "AAIsIKACAirAAAIsIKACCyzB4Aq2pne2v2hH3nkUfvG3f73tuH3V5VL7722bDb/3",
              "zhL8Nuj/XBsMvPXHhs2G1uHH6sAAAiwgoAICKsAAAiwgoAICKsAAAiwgoAICKsAA",
              "AiwgoAICKsAAAiwgoAICKsAAAiwgoAICKsAAAiwgoAICKsAAAiwgoAICKsAAAiwg",
              "oAICKsAAAiwgoAICKsAAAiwgoAILLMHgAj7WxvzZ6w79xxy8bsCUQevvun2ROA3/",
              "BjBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQ",
              "AQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEVYAABFhBQAQEV",
              "YAAJFl9gBYVee+vTzs9s721rDbAIzjxwoAICKsAAAiwgoAICKsAAAiwgoAICKsAA",
              "AiwgoAICKsAAAiwgoAICKsAAAiwgoAICKsAAAiwgoAICKsAAAiwgoAICKsAAAiwg",
              "oAICKsAAAiwgoAICKsAAAiwgoAICKsAAAiy+wBMNK5by/PnrBWfv7y3LDbH3457D",
              "R/4MP/fTJ7wp58dPTfsyew5vxYAQBEhBUAQERYAQBEhBUAQERYAQBEhBUAQERYAQ",
              "BEhBUAQERYAQBEhBUAQERYAQBEhBUAQERYAQBEhBUAQERYAQBEhBUAQERYAQBEhB",
              "UAQERYAQBEhBUAQERYAQBEhBUAQGSZPQBW1c721uwJAOwzfqwAACLCCgAgIqwAAC",
              "LCCgAgIqwAACLCCgAgIqwAACLCCgAgIqwAACLCCgAgIqwAACLCCgAgIqwAACLCCg",
              "AgIqwAACLCCgAgIqwAACLCCgAgIqwAACLCCgAgIqwAACLCCgAgssweAH996T+zJ+",
              "zJD++8MnsCa+7yu9/MnrAnW0/cM3sCDOPHCgAgIqwAACLCCgAgIqwAACLCCgAgIq",
              "wAACLCCgAgIqwAACLCCgAgIqwAACLCCgAgIqwAACLCCgAgIqwAACLCCgAgIqwAAC",
              "LCCgAgIqwAACLCCgAgIqwAACLCCgAgIqwAACLL7AEA7M3WE/fMngD8hh8rAICIsA",
              "IAiAgrAICIsAIAiAgrAICIsAIAiAgrAICIsAIAiAgrAICIsAIAiAgrAICIsAIAiA",
              "grAICIsAIAiAgrAICIsAIAiAgrAICIsAIAiAgrAICIsAIAiAgrAICIsAIAiAgrAI",
              "CIsAIAiAgrAICIsAIAiAgrAICIsAIAiAgrAICIsAIAiAgrAICIsAIAiAgrAICIsA",
              "IAiAgrAICIsAIAiAgrAICIsAIAiAgrAICIsAIAiAgrAICIsAIAiAgrAICIsAIAiA",
              "grAIDIMnsArKrvf7w0e8Ke3Hbr3bMnANyw/FgBAESEFQBARFgBAESEFQBARFgBAE",
              "SEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQ",
              "BARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBAZJk9ALi+vv/x0rDb/z0/7DTX2a",
              "Hn3pw9AVaSHysAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgI",
              "iwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAgCICCsAgIiwAg",
              "CICCsAgIiwAgCILLMHwEgPnf/bsNsXDxwedntVHdv8ZfYEIruzB8CK8mMFABARVg",
              "AAEWEFABARVgAAEWEFABARVgAAEWEFABARVgAAEWEFABARVgAAEWEFABARVgAAEW",
              "EFABARVgAAEWEFABARVgAAEWEFABARVgAAEWEFABARVgAAEWEFABARVgAAkWX2AL",
              "h46vi42wcOD7v9+NELw26/vztuN1yLv9/8xrDbL/98YthtmM2PFQBARFgBAESEFQ",
              "BARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARF",
              "gBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESW2QPoXDx1fP",
              "aEtfL+7uFhtx8/emHY7Zu+ODjsNlyLo289Oez27lNvD7sN18KPFQBARFgBAESEFQ",
              "BARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARF",
              "gBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAEQ2Tpw+c3X2iP",
              "3m4qnjsycQObb5y+wJ+84jzz4wewIr4ON/nZ89Ya3sPvX27AlE/FgBAESEFQBARF",
              "gBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAE",
              "SEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBARFgBAESEFQBA5FdySWoe28",
              "2w6gAAAABJRU5ErkJggg=="
            ]
          }
        ],
<strong>        "image": [
</strong>          "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAATgAAAE4CAYAAADPf+",
          "9qAAAGFUlEQVR4nO3dvauWdRjAcU9IGTQUvZihtDQEDkFBLSktDg0NQRC4R52iGq",
          "KWIChoqKaKshdapKUIWgTh1BDZVCr0J4iRSQ2BDTrIaQo6i3jr+Z37Od/n85l/3F",
          "w8w5druXhWVo+ure8ACLph7gEARhE4IEvggCyBA7IEDsgSOCBL4IAsgQOyBA7IEj",
          "ggS+CALIEDsgQOyBI4IEvggCyBA7IEDsgSOCBL4IAsgQOyBA7IEjggS+CALIEDsg",
          "QOyBI4IEvggCyBA7IEDsgSOCBL4IAsgQOyBA7IEjggS+CALIEDsgQOyBI4IEvggC",
          "yBA7IEDsgSOCBL4IAsgQOyBA7IEjggS+CALIEDsgQOyBI4IEvggCyBA7IEDsgSOC",
          "BL4IAsgQOyBA7IEjggS+CArJ1zD7Dsfnj7+aHf37vrr6Hf58rue+XruUdYajY4IE",
          "vggCyBA7IEDsgSOCBL4IAsgQOyBA7IEjggS+CALIEDslZWj66tzz1Eyejb0tHcrs",
          "7L7ermssEBWQIHZAkckCVwQJbAAVkCB2QJHJAlcECWwAFZAgdkCRyQJXBAlsABWQ",
          "IHZAkckCVwQJbAAVkCB2QJHJAlcECWwAFZAgdkCRyQtXPuAVgsv128Y9J7/6PKIr",
          "PBAVkCB2QJHJAlcECWwAFZAgdkCRyQJXBAlsABWQIHZAkckOUWlevy4sN3Dv3+hz",
          "//OfT7o039fY4PmmNZ2eCALIEDsgQOyBI4IEvggCyBA7IEDsgSOCBL4IAsgQOyBA",
          "7IcovKBu8cXJl7hA2m3nJu99tVNpcNDsgSOCBL4IAsgQOyBA7IEjggS+CALIEDsg",
          "QOyBI4IEvggCy3qHEP3b170vsjv65Per//rguT3o/2wL59c4+wwY/n5p5gudnggC",
          "yBA7IEDsgSOCBL4IAsgQOyBA7IEjggS+CALIEDsgQOyHKLus1MvS0d7dAT+6e9v/",
          "+2QZNcm9fe+2nS+3dffXTQJP/5dtLrF848OWiOBhsckCVwQJbAAVkCB2QJHJAlcE",
          "CWwAFZAgdkCRyQJXBAlsABWW5RZ7Zot6W337wy9whb6uCei3OPwEA2OCBL4IAsgQ",
          "OyBA7IEjggS+CALIEDsgQOyBI4IEvggCyBA7Lcom4zp/44P+n9ot26wlaywQFZAg",
          "dkCRyQJXBAlsABWQIHZAkckCVwQJbAAVkCB2QJHJDlFnVmU29LF82lk6cmvT92ct",
          "AgW+TYl98P/f7xAx8N/f6yscEBWQIHZAkckCVwQJbAAVkCB2QJHJAlcECWwAFZAg",
          "dkCRyQ5RZ1m/E/p3D1bHBAlsABWQIHZAkckCVwQJbAAVkCB2QJHJAlcECWwAFZAg",
          "dkuUXdZI+9/vHQ71/44s2h318257/6fej3dz99z9Dvc2U2OCBL4IAsgQOyBA7IEj",
          "ggS+CALIEDsgQOyBI4IEvggCyBA7LcorLU3Iq22eCALIEDsgQOyBI4IEvggCyBA7",
          "IEDsgSOCBL4IAsgQOyBA7IEjggS+CALIEDsgQOyBI4IEvggCyBA7IEDsgSOCBL4I",
          "AsgQOyBA7I8r+o28zf/5wb+v1bb9kz9PuwlWxwQJbAAVkCB2QJHJAlcECWwAFZAg",
          "dkCRyQJXBAlsABWQIHZLlFZYOpt66fnR40yILa9/Inc4/ABDY4IEvggCyBA7IEDs",
          "gSOCBL4IAsgQOyBA7IEjggS+CALIEDstyizuyR049Pen92x72DJrk2h3ddnnuELX",
          "Vi7gGYxAYHZAkckCVwQJbAAVkCB2QJHJAlcECWwAFZAgdkCRyQJXBAllvUTXb2/e",
          "emvZ94W/rUgTOT3n9zYrFuV7e7t246Mun9G5dWB03C1bDBAVkCB2QJHJAlcECWwA",
          "FZAgdkCRyQJXBAlsABWQIHZAkckLV0t6hTb0UXzdTb0qm3qzf+snfSe67swKfPTH",
          "p/4tnPB02ynGxwQJbAAVkCB2QJHJAlcECWwAFZAgdkCRyQJXBAlsABWQIHZK2sHl",
          "1bn3uI/9vut6JTHd51ee4RNjj00oNzj7DQvvvg9NwjXJdlu3W1wQFZAgdkCRyQJX",
          "BAlsABWQIHZAkckCVwQJbAAVkCB2QJHJD1L4cNZ+LMYCADAAAAAElFTkSuQmCC"
        ],
        "mediaType": "image/png",
        "name": "hunk0030"
      }
    }
  }
}
</code></pre>

そして、これがオンチェーンでの表示方法です。ストレージの下に "On-Chain immutable "と表示されているのが見えるはずです。サムネイルにIPFSを使用しているNFTでは、"IPFS, On-Chain immutable "と表示されます。

<figure><img src="/files/hDANU3ri1tRYp7DxNJYy" alt=""><figcaption><p>pool.pmでbas64エンコードされた画像を使ったNFTのプレビュー</p></figcaption></figure>


---

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