itemLookUp complete and addItem endpoint

api/utils/fetchEbayUserToken.js

@@ -0,0 +1,41 @@
+import fetch from "node-fetch";
+
+const fetchEbayUserToken = async (authorizationCode) => {
+  const clientId = process.env.EBAY_CLIENT_ID;
+  const clientSecret = process.env.EBAY_CLIENT_SECRET;
+  const redirectUri = process.env.EBAY_REDIRECT_URI; // Make sure this matches the URI registered with eBay
+  const credentials = Buffer.from(`${clientId}:${clientSecret}`).toString(
+    "base64"
+  );
+
+  try {
+    const response = await fetch(
+      "https://api.ebay.com/identity/v1/oauth2/token",
+      {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/x-www-form-urlencoded",
+          Authorization: `Basic ${credentials}`,
+        },
+        body: `grant_type=authorization_code&code=${authorizationCode}&redirect_uri=${encodeURIComponent(
+          redirectUri
+        )}`,
+      }
+    );
+
+    if (!response.ok) {
+      const errorBody = await response.text();
+      throw new Error(
+        `Failed to fetch eBay user token: ${response.status} ${response.statusText} - ${errorBody}`
+      );
+    }
+
+    const data = await response.json();
+    return data.access_token; // This is the User access token
+  } catch (error) {
+    console.error("Error fetching eBay user token:", error);
+    throw error;
+  }
+};
+
+export default fetchEbayUserToken;