fix onchain metadata decoding error

example/node.js

@@ -37,9 +37,11 @@ avt
   })
   .catch(console.log);
 
-avt
-  .getHeader(ensName)
+try {
+  avt
+  .getHeader(ensName, { jsdomWindow: jsdom })
   .then(header => {
     console.log('header: ', header);
   })
   .catch(console.log);
+} catch {}

package.json

@@ -1,5 +1,5 @@
 {
-  "version": "1.0.2",
+  "version": "1.0.3",
   "license": "MIT",
   "main": "dist/index.js",
   "module": "dist/index.esm.js",

src/specs/erc1155.ts

@@ -62,7 +62,8 @@ export default class ERC1155 {
           'base64'
         ).toString();
       }
-      return JSON.parse(_resolvedUri);
+      const metadata = JSON.parse(_resolvedUri);
+      return { ...metadata, is_owner: isOwner };
     }
 
     const marketplaceKey = getMarketplaceAPIKey(resolvedURI, options);

src/specs/erc721.ts

@@ -50,7 +50,7 @@ export default class ERC721 {
           'base64'
         ).toString();
       }
-      const metadata = JSON.parse(decodeURI(_resolvedUri));
+      const metadata = JSON.parse(_resolvedUri);
       return { ...metadata, is_owner: isOwner };
     }
     const response = await fetch(

src/utils/resolveURI.ts

@@ -9,6 +9,7 @@ const IPNS_SUBPATH = '/ipns/';
 const networkRegex = /(?<protocol>ipfs:\/|ipns:\/|ar:\/)?(?<root>\/)?(?<subpath>ipfs\/|ipns\/)?(?<target>[\w\-.]+)(?<subtarget>\/.*)?/;
 const base64Regex = /^data:([a-zA-Z\-/+]*);base64,([^"].*)/;
 const dataURIRegex = /^data:([a-zA-Z\-/+]*)?(;[a-zA-Z0-9].*?)?(,)/;
+const JSON_MIMETYPE = 'data:application/json;';
 
 function _getImageMimeType(uri: string) {
   const base64Data = uri.replace(base64Regex, '$2');
@@ -49,11 +50,11 @@ function _isValidBase64(uri: string) {
   }
 
   const [header, str] = uri.split('base64,');
-
-  const mimeType = _getImageMimeType(uri);
-
-  if (!mimeType || !header.includes(mimeType)) {
-    return false;
+  if (header != JSON_MIMETYPE) {
+    const mimeType = _getImageMimeType(uri);
+    if (!mimeType || !header.includes(mimeType)) {
+      return false;
+    }
   }
 
   // length must be multiple of 4