Create class for quotes service

cache.ts

@@ -1,37 +0,0 @@
-import assert from "assert";
-import BN from "bn.js";
-import fetch from 'node-fetch';
-
-let cachedQuotes: BN[] = [];
-
-assert(process.env.NEXT_PUBLIC_USDC_MINT, 'USDC_MINT is required');
-assert(process.env.NEXT_PUBLIC_MTM_TOKEN_MINT, 'MTM_TOKEN_MINT is required');
-
-const MTM_TOKEN_MINT = process.env.NEXT_PUBLIC_MTM_TOKEN_MINT;
-const USDC_MINT = process.env.NEXT_PUBLIC_USDC_MINT;
-
-export async function fetchAndCacheQuotes(): Promise<void> {
-  try {
-    const url = `https://api.jup.ag/price/v2?ids=${USDC_MINT}&vsToken=${MTM_TOKEN_MINT}`;
-    const response = await fetch(url);
-
-    if (!response.ok) {
-      throw new Error(`Failed to fetch quote: ${response.statusText}`);
-    }
-
-    const quoteResponse = await response.json();
-    const priceFromAPI = Number(quoteResponse['data'][USDC_MINT]['price']).toFixed(6);
-    const price = new BN(priceFromAPI.toString().replace('.', ''));
-
-    cachedQuotes.push(price);
-    if (cachedQuotes.length > 3) {
-      cachedQuotes.shift();
-    }
-  } catch (error) {
-    console.error('Error fetching quotes:', error);
-  }
-}
-
-export function getLatestQuote(): BN | undefined {
-  return cachedQuotes[cachedQuotes.length - 1];
-}

quotes-service.ts

@@ -0,0 +1,43 @@
+import assert from "assert";
+import BN from "bn.js";
+import fetch from 'node-fetch';
+
+assert(process.env.NEXT_PUBLIC_USDC_MINT, 'USDC_MINT is required');
+assert(process.env.NEXT_PUBLIC_MTM_TOKEN_MINT, 'MTM_TOKEN_MINT is required');
+
+const MTM_TOKEN_MINT = process.env.NEXT_PUBLIC_MTM_TOKEN_MINT;
+const USDC_MINT = process.env.NEXT_PUBLIC_USDC_MINT;
+
+class QuotesService {
+  private cachedQuotes: BN[] = [];
+
+  async fetchAndCacheQuotes(): Promise<void> {
+    try {
+      const url = `https://api.jup.ag/price/v2?ids=${USDC_MINT}&vsToken=${MTM_TOKEN_MINT}`;
+      const response = await fetch(url);
+
+      if (!response.ok) {
+        throw new Error(`Failed to fetch quote: ${response.statusText}`);
+      }
+
+      const quoteResponse = await response.json();
+      const priceFromAPI = Number(quoteResponse['data'][USDC_MINT]['price']).toFixed(6);
+      const price = new BN(priceFromAPI.toString().replace('.', ''));
+
+      this.cachedQuotes.push(price);
+      if (this.cachedQuotes.length > 3) {
+        this.cachedQuotes.shift();
+      }
+      console.log('Cache updated: ', this.cachedQuotes);
+    } catch (error) {
+      console.error('Error fetching quotes:', error);
+    }
+  }
+
+  getLatestQuote(): BN | undefined {
+    console.log({ cachedQuotes: this.cachedQuotes });
+    return this.cachedQuotes[this.cachedQuotes.length - 1];
+  }
+}
+
+export { QuotesService };

server.ts

@@ -4,32 +4,30 @@ import next from 'next';
 import dotenv from 'dotenv';
 dotenv.config();
 
-import { fetchAndCacheQuotes, getLatestQuote } from './cache';
+import { QuotesService } from './quotes-service';
 
 const port = parseInt(process.env.PORT || '3000', 10);
 const app = next({ dev: process.env.NODE_ENV !== 'production' });
 const handle = app.getRequestHandler();
 
+const quotesService = new QuotesService();
+
 declare global {
   namespace NodeJS {
     interface Global {
-      quoteService: {
-        getLatestQuote: typeof getLatestQuote;
-      }
-    }
+      quotesService: typeof quotesService
   }
 }
+}
 
-// TODO: Look for a better way to use quoteService
+// TODO: Look for a better way to use quotesService
 // Initialize the global quote service
-(global as any).quoteService = {
-  getLatestQuote
-};
+(global as any).quotesService = quotesService
 
 app.prepare().then(() => {
   const server = createServer(async (req, res) => {
     const parsedUrl = parse(req.url!, true);
-    (req as any).getLatestQuote = getLatestQuote;
+    (req as any).quotesService = quotesService;
 
     // Default Next.js request handling
     handle(req, res, parsedUrl);
@@ -40,6 +38,6 @@ app.prepare().then(() => {
   });
 
   // Initial call and interval setup
-  fetchAndCacheQuotes(); // Initial store
-  setInterval(fetchAndCacheQuotes, 5 * 60 * 1000); // Update cache every 5 minutes
+  quotesService.fetchAndCacheQuotes(); // Initial store
+  setInterval(() => quotesService.fetchAndCacheQuotes(), 5 * 60 * 1000); // Update cache every 5 minutes
 });