Dont try to fetch 4bytes again in case of network errors

src/use4Bytes.ts

@@ -53,6 +53,7 @@ const fourBytesFetcher =
     const fourBytes = key.slice(2);
     const signatureURL = fourBytesURL(assetsURLPrefix, fourBytes);
 
+    try {
       const res = await fetch(signatureURL);
       if (!res.ok) {
         console.warn(`Signature does not exist in 4bytes DB: ${fourBytes}`);
@@ -70,6 +71,11 @@ const fourBytesFetcher =
         signature: sig,
       };
       return entry;
+    } catch (err) {
+      // Network error or something wrong with URL config;
+      // silence and don't try it again
+      return null;
+    }
   };
 
 /**