How to integrate WP-Invoice with 2Checkout

WP e-Commerce Settings:

1. Download or clone the 2Checkout payment module at https://github.com/craigchristenson/2checkout-wp-invoice
2. Upload the files under the “wp-invoice” directory to “/wp-content/plugins/wp-invoice” on your web server.
3. In your WordPress admin select Invoice -> Settings to open your WP Invoice settings.
4. Under Payment select 2Checkout.
5. Enter Display Name. Example: Credit Card (Visa, MasterCard, American Express, Discover, JCB, Diners Club, PIN Debit) and PayPal
6. Enter your 2Checkout Account Number.
7. Enter your 2Checkout Secret Word. (Must be the same value entered on your 2Checkout Site Management page.)
8. For demo sales set Demo Mode to Yes. For live sales keep Demo Mode at No.
9. Under Direct Checkout select Yes.
10. Copy the URL provided under “2Checkout Approved URL/INS URL”.
11. Click Save All Settings.

2Checkout Settings:

1. Sign in to your 2Checkout account.
2. Navigate to Dashboard → Integrations → Webhooks & API Section
3. Activate Redirect URL: In the Redirect URL section check “Enable return after sale” and for Return method, select Link in the Thank You Page or Redirect Header. Set the Approved URL to the URL provided in your WP Invoice settings (Replace http://yourdomain.com with the actual URL to your domain). Finally, click Update to save your settings.
4. In the Secret Word section enter the INS Secret Word (it must be the same value entered in your WP Invoice settings).
5. In the Webhooks and API section, under the Instant Notification Service (INS) card, check the Enable Global URL box.
6. Enter the Approved URL (it must be the same value entered in your WP Invoice settings) as the Global URL (replace http://www.yourdomain.com with your actual website URL)
7. Enable all triggers and click on Update to save your changes

For more information visit: http://wordpress.org/extend/plugins/wp-invoice/