update advanced integration format to support v1 and v2 (#87)

advanced-integration/README.md

@@ -1,9 +1,14 @@
-# Advanced Integration Example
+# Advanced Checkout Integration Example
 
-This folder contains example code for an Advanced PayPal integration using both the JS SDK and Node.js to complete transactions with the PayPal REST API.
+This folder contains example code for a PayPal advanced Checkout integration using both the JavaScript SDK and Node.js to complete transactions with the PayPal REST API.
+
+* [`v2`](v2/README.md) contains sample code for the current advanced Checkout integration. This includes guidance on using Hosted Card Fields.
+* [`v1`](v1/README.md) contains sample code for the legacy advanced Checkout integration. Use `v2` for new integrations.
 
 ## Instructions
 
+These instructions apply to the sample code for both `v2` and `v1`:
+
 1. Rename `.env.example` to `.env` and update `PAYPAL_CLIENT_ID` and `PAYPAL_CLIENT_SECRET`.
 2. Run `npm install`
 3. Run `npm start`

advanced-integration/v1/.gitignore

@@ -0,0 +1 @@
+.env

advanced-integration/v1/README.md

@@ -1,11 +1,14 @@
 # Advanced Integration Example
 
-This folder contains example code for an Advanced PayPal integration using both the JS SDK and Node.js to complete transactions with the PayPal REST API.
+This folder contains example code for [version 1](https://developer.paypal.com/docs/checkout/advanced/integrate/sdk/v1) of a PayPal advanced Checkout integration using the JavaScript SDK and Node.js to complete transactions with the PayPal REST API.
+
+> **Note:** Version 1 is a legacy integration. Use [version 2](https://developer.paypal.com/docs/checkout/advanced/integrate/) for new integrations.
 
 ## Instructions
 
-1. Rename `.env.example` to `.env` and update `PAYPAL_CLIENT_ID` and `PAYPAL_CLIENT_SECRET`.
-2. Run `npm install`
-3. Run `npm start`
-4. Open http://localhost:8888
-5. Enter the credit card number provided from one of your [sandbox accounts](https://developer.paypal.com/dashboard/accounts) or [generate a new credit card](https://developer.paypal.com/dashboard/creditCardGenerator)
+1. [Create an application](https://developer.paypal.com/dashboard/applications/sandbox/create).
+2. Rename `.env.example` to `.env` and update `PAYPAL_CLIENT_ID` and `PAYPAL_CLIENT_SECRET`.
+3. Run `npm install`.
+4. Run `npm start`.
+5. Open http://localhost:8888.
+6. Enter the credit card number provided from one of your [sandbox accounts](https://developer.paypal.com/dashboard/accounts) or [generate a new credit card](https://developer.paypal.com/dashboard/creditCardGenerator).

advanced-integration/v1/package.json

@@ -6,10 +6,10 @@
   "type": "module",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "start": "nodemon server/server.js",
+    "start": "nodemon server.js",
     "format": "npx prettier --write **/*.{js,md}",
     "format:check": "npx prettier --check **/*.{js,md}",
-    "lint": "npx eslint server/*.js --env=node && npx eslint client/*.js --env=browser"
+    "lint": "npx eslint server.js paypal-api.js --env=node && npx eslint public/*.js --env=browser"
   },
   "license": "Apache-2.0",
   "dependencies": {