Refactor: Exclude chains with known subscription issues (#139)

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: shane <shane@dune.com>

Author: 3 people

evm/subscriptions.mdx

@@ -6,6 +6,14 @@ description: "Get realtime onchain data pushed directly to your app with webhook
 
 import { SupportedChains } from "/snippets/supported-chains.mdx";
 
+{/* 
+  NOTE: The SupportedChains components below exclude "abstract", "zero_network", and "zksync"
+  because subscriptions are not currently working for these chains due to ingestion issues.
+  This is a temporary frontend workaround until the backend API properly reflects subscription
+  chain support separately from general API endpoint support.
+  See: https://duneanalytics.slack.com/archives/C04AD72E0FL/p1766158048815119
+*/}
+
 The Subscriptions API allows you to receive realtime onchain data through webhooks. Instead of repeatedly polling endpoints to check for new data, the Subscriptions API pushes data directly to your app as soon as events occur. This makes it a great way to build reactive apps that respond instantly to onchain activity.
 
 Essentially, the Subscriptions API provides a webhook-based version of our existing [Balances](/evm/balances), [Activity](/evm/activity), and [Transactions](/evm/transactions) endpoints. Supported chains vary by subscription type.
@@ -77,7 +85,7 @@ Below are examples of the webhook payloads for each subscription type, along wit
 
 Get notified when a wallet's ERC20 token balance changes. The payload contains details about the asset, the balance change, and the transaction that caused it. This data is similar to the response from our [Balances API](/evm/balances).
 
-<SupportedChains endpoint="balances" title="Balances Event Supported Chains" />
+<SupportedChains endpoint="balances" title="Balances Event Supported Chains" excludeChains={["abstract", "zero_network", "zksync"]} />
 
 <CodeGroup>
 ```json [expandable] Balance Change Payload
@@ -116,7 +124,7 @@ Get notified when a wallet's ERC20 token balance changes. The payload contains d
 
 Receive a notification when a new activity is associated with a subscribed address. The payload contains an array of activity objects, which is similar to the response from our [Activity API](/evm/activity).
 
-<SupportedChains endpoint="activity" title="Activities Event Supported Chains" />
+<SupportedChains endpoint="activity" title="Activities Event Supported Chains" excludeChains={["abstract", "zero_network", "zksync"]} />
 
 <CodeGroup>
 ```json [expandable] Activity Payload
@@ -159,7 +167,7 @@ Receive a notification when a new activity is associated with a subscribed addre
 
 Get notified when a subscribed address is the sender or receiver of a transaction. The payload contains an array of transaction objects, which is similar to the response from our [Transactions API](/evm/transactions).
 
-<SupportedChains endpoint="transactions" title="Transactions Event Supported Chains" />
+<SupportedChains endpoint="transactions" title="Transactions Event Supported Chains" excludeChains={["abstract", "zero_network", "zksync"]} />
 
 <CodeGroup>
 ```json [expandable] Transaction Payload

snippets/supported-chains.mdx

@@ -1,4 +1,4 @@
-export const SupportedChains = ({ endpoint, title }) => {
+export const SupportedChains = ({ endpoint, title, excludeChains }) => {
   const dataState = useState(null);
   const data = dataState[0];
   const setData = dataState[1];
@@ -30,16 +30,22 @@ export const SupportedChains = ({ endpoint, title }) => {
 
   var supportedChains = [];
   var totalChains = data.chains.length;
+  var excludedChainNames = excludeChains || [];
 
   if (endpoint !== undefined && endpoint !== 'defi_positions') {
     for (var i = 0; i < data.chains.length; i++) {
       var chain = data.chains[i];
-      if (chain[endpoint] && chain[endpoint].supported) {
+      if (chain[endpoint] && chain[endpoint].supported && excludedChainNames.indexOf(chain.name) === -1) {
         supportedChains.push(chain);
       }
     }
   } else {
-    supportedChains = data.chains;
+    for (var i = 0; i < data.chains.length; i++) {
+      var chain = data.chains[i];
+      if (excludedChainNames.indexOf(chain.name) === -1) {
+        supportedChains.push(chain);
+      }
+    }
   }
 
   var count = supportedChains.length;