update healthcheck; add metrics config

app/api/tokens.server.ts

@@ -18,19 +18,32 @@ import {
 } from ".graphclient";
 
 /**
- * Fetches tokens available for swapping with NFT metadata and USD prices
+ * Fetches tokens available for swapping
  */
 export const fetchTokens = async () => {
-  const result = (await execute(
+  const { data, errors } = (await execute(
     GetTokensDocument,
     {},
   )) as ExecutionResult<GetTokensQuery>;
-  const { tokens: rawTokens = [] } = result.data ?? {};
+  if (errors) {
+    throw new Error(
+      `Error fetching tokens: ${errors.map((error) => error.message).join(", ")}`,
+    );
+  }
+
+  return data?.tokens ?? [];
+};
+
+/**
+ * Fetches tokens available for swapping with NFT metadata and USD prices
+ */
+export const fetchTokensWithMetadata = async () => {
+  const tokens = await fetchTokens();
   const [[collectionMapping, tokenMapping], magicUSD] = await Promise.all([
-    fetchTokensCollections(rawTokens),
+    fetchTokensCollections(tokens),
     fetchMagicUSD(),
   ]);
-  return rawTokens.map((token) =>
+  return tokens.map((token) =>
     createPoolToken(token, collectionMapping, tokenMapping, magicUSD),
   );
 };

app/routes/healthcheck.tsx

@@ -1 +1,11 @@
-export const loader = () => new Response("OK");
+import { fetchTokens } from "~/api/tokens.server";
+
+export const loader = async () => {
+  try {
+    await fetchTokens();
+    return new Response("OK");
+  } catch (err) {
+    console.error("Healthcheck failed:", err);
+    return new Response("ERROR", { status: 500 });
+  }
+};

app/routes/swap.tsx

@@ -27,6 +27,7 @@ import {
   fetchPoolTokenBalance,
   fetchToken,
   fetchTokens,
+  fetchTokensWithMetadata,
 } from "~/api/tokens.server";
 import { CurrencyInput } from "~/components/CurrencyInput";
 import { DisabledInputPopover } from "~/components/DisabledInputPopover";
@@ -114,7 +115,7 @@ export async function loader({ request }: LoaderFunctionArgs) {
   const address = session.get("address");
   return defer({
     pools,
-    tokens: fetchTokens(),
+    tokens: fetchTokensWithMetadata(),
     tokenIn,
     tokenOut,
     tokenInNFTBalance:

fly.toml

@@ -23,3 +23,7 @@ primary_region = "lax"
     path = "/healthcheck"
     protocol = "http"
     tls_skip_verify = false
+
+[metrics]
+  port = 9090
+  path = "/metrics"