fix: Allow native reading of data: urls for VerifiableURI

src/lib/getDataFromExternalSources.ts

@@ -79,20 +79,29 @@ export const getDataFromExternalSources = (
         urlDataWithHash as URLDataWithHash,
         ipfsGateway,
       );
+
       try {
         if (/[=?/]$/.test(url)) {
           // this URL is not verifiable and the URL ends with a / or ? or = meaning it's not a file
           // and more likely to be some kind of directory or query BaseURI
           return dataEntry;
         }
-        const receivedData = await fetch(url).then(async (response) => {
-          if (!response.ok) {
-            throw new Error(response.statusText);
-          }
-          return response
-            .arrayBuffer()
-            .then((buffer) => new Uint8Array(buffer));
-        });
+        let receivedData: Uint8Array;
+        const [, encoding, data] = url.match(/^data:.*?;(.*?),(.*)$/) || [];
+        if (data) {
+          receivedData = Uint8Array.from(
+            Buffer.from(data, encoding === 'base64' ? 'base64' : 'utf8'),
+          );
+        } else {
+          receivedData = await fetch(url).then(async (response) => {
+            if (!response.ok) {
+              throw new Error(response.statusText);
+            }
+            return response
+              .arrayBuffer()
+              .then((buffer) => new Uint8Array(buffer));
+          });
+        }
         if (receivedData.length >= 2) {
           // JSON data cannot be less than 2 characters long.
           try {