From e8aad7f01da28b2acc327cd77dba1c3041486da4 Mon Sep 17 00:00:00 2001
From: Ardis Lu <ardisglu@gmail.com>
Date: Sun, 30 Apr 2023 23:43:20 -0700
Subject: [PATCH] Handle smart contracts with Swarm hash

---
 index.html | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/index.html b/index.html
index 0a76f0d..78feef0 100644
--- a/index.html
+++ b/index.html
@@ -117,10 +117,23 @@
       const bytecode = await fetchBytecode(address, rpc);
       const cbor = extractCBOR(bytecode);
       const metadata = decodeCBOR(cbor);
-      const { cidV0, cidV1 } = calculateCID(metadata);
-      const json = await fetchJSONMetadata(cidV1, ipfs);
+      let output;
+      if (metadata.bzzr0 !== undefined) {
+        const hex = [...metadata.bzzr0].map(b => b.toString(16).padStart(2, '0')).join('');
+        output = 'Unable to fetch metadata because the smart contract uses a Swarm hash. Swarm hash below:\n';
+        output += `bzzr://${hex}`;
+      }
+      else if (metadata.bzzr1 !== undefined) {
+        const hex = [...metadata.bzzr0].map(b => b.toString(16).padStart(2, '0')).join('');
+        output = 'Unable to fetch metadata because the smart contract uses a Swarm hash. Swarm hash below:\n';
+        output += `bzz-raw://${hex}`;
+      }
+      else {
+        const { cidV0, cidV1 } = calculateCID(metadata);
+        output = JSON.stringify(await fetchJSONMetadata(cidV1, ipfs));
+      }
 
-      result.textContent = JSON.stringify(json);
+      result.textContent = output;
     })
   </script>
 </body>
-- 
2.47.3