chore: update filter policy hourly (#126)

# Description

Update the filter policy every hour

# Changes

- [x] Set frequency at which to update the filter policy

src/domain/chainContext.ts

@@ -37,6 +37,7 @@ import { FilterPolicy } from "../utils/filterPolicy";
 const WATCHDOG_FREQUENCY = 5 * 1000; // 5 seconds
 
 const MULTICALL3 = "0xcA11bde05977b3631167028862bE2a173976CA11";
+const FILTER_FREQUENCY_SECS = 60 * 60; // 1 hour
 
 export const SDK_BACKOFF_NUM_OF_ATTEMPTS = 5;
 
@@ -469,8 +470,15 @@ async function processBlock(
     block.number.toString()
   );
 
-  // Get the latest filter policy
-  if (filterPolicy) {
+  // Refresh the policy every hour
+  // NOTE: This is a temporary solution until we have a better way to update the filter policy
+  const blocksPerFilterFrequency =
+    FILTER_FREQUENCY_SECS /
+    (context.chainId === SupportedChainId.GNOSIS_CHAIN ? 5 : 12); // 5 seconds for gnosis, 12 seconds for mainnet
+  if (
+    filterPolicy &&
+    block.number % (FILTER_FREQUENCY_SECS / blocksPerFilterFrequency) == 0
+  ) {
     filterPolicy.reloadPolicies().catch((error) => {
       console.log(`Error fetching the filter policy config for chain `, error);
       return null;