fix marketplace not fetching NFT metadata from non-standard contracts

src/common/nft.ts

@@ -43,14 +43,21 @@ export async function fetchTokenMetadata(
   try {
     jsonMetadata = await storage.get(parsedUri);
   } catch (err) {
-    console.warn(
-      `failed to get token metadata: ${JSON.stringify({
-        tokenId,
-        tokenUri,
-      })} -- falling back to default metadata`,
-      err,
+    const unparsedTokenIdUri = tokenUri.replace(
+      "{id}",
+      BigNumber.from(tokenId).toString(),
     );
-    jsonMetadata = FALLBACK_METADATA;
+    try {
+      jsonMetadata = await storage.get(unparsedTokenIdUri);
+    } catch (e) {
+      console.warn(
+        `failed to get token metadata: ${JSON.stringify({
+          tokenId: tokenId.toString(),
+          tokenUri,
+        })} -- falling back to default metadata`,
+      );
+      jsonMetadata = FALLBACK_METADATA;
+    }
   }
 
   return CommonNFTOutput.parse({

src/core/classes/ipfs-storage.ts

@@ -191,6 +191,9 @@ export class IpfsStorage implements IStorage {
       uri = resolveGatewayUrl(hash, "ipfs://", this.gatewayUrl);
     }
     const result = await fetch(uri);
+    if (!result.ok && result.status === 500) {
+      throw new Error(`Error fetching ${uri} - Status code ${result.status}`);
+    }
     if (!result.ok && result.status !== 404) {
       const nextUrl = this.getNextPublicGateway();
       if (nextUrl) {