fix: use archive RPC node and add error handling for staked XTZ balance

- Switch RPC nodes to rpc.tzkt.io (archive nodes with full history)
- Add try/catch with fallback to TzKT API if RPC fails
- Ensures staked XTZ is included in voting power via full_balance endpoint
- Fixes voting power queries for proposals older than 3 days

Author: EightRice

.gitignore

@@ -37,3 +37,9 @@ bun.lockb
 
 # Local Netlify folder
 .netlify
+
+# Claude
+.claude/
+
+# Misc
+deno.lock

services/index.js

@@ -9,8 +9,8 @@ const networkNameMap = {
 };
 
 const rpcNodes = {
-  mainnet: "https://mainnet.api.tez.ie",
-  ghostnet: "https://ghostnet.smartpy.io",
+  mainnet: "https://rpc.tzkt.io/mainnet",
+  ghostnet: "https://rpc.tzkt.io/ghostnet",
 };
 
 const getTokenMetadata = async (contractAddress, network, tokenId) => {

utils.js

@@ -80,13 +80,18 @@ const getUserBalanceAtLevel = async (
 const getUserXTZBalanceAtLevelViaRpc = async (network, level, userAddress) => {
   const rpcUrl = rpcNodes[network];
   const url = `${rpcUrl}/chains/main/blocks/${level}/context/contracts/${userAddress}/full_balance`;
-  console.log("url: ", url);
-  const response = await axios({ url, method: "GET" });
-  
-  if (response.status === 200) {
-    return new BigNumber(response.data);
+
+  try {
+    const response = await axios({ url, method: "GET" });
+    if (response.status === 200) {
+      return new BigNumber(response.data);
+    }
+  } catch (error) {
+    // RPC failed (likely historical block not available), fall back to TzKT
+    console.warn(`RPC failed for block ${level}, falling back to TzKT API`);
+    return await getUserXTZBalanceAtLevel(network, level, userAddress);
   }
-  
+
   return new BigNumber(0);
 };