I'm using Omnipay with CodeIgniter to allow customers to checkout on Paypal. I was using test mode during the development on the website, but now the site is done and ready to be put in production.
But I don't know how to setup Omnipay to use live payments and not Sandbox mode. I tried setting the testMode to false. -> Security header invalid.
I tried creating REST Api credentials -> You can't make this api call.
I know that's probably not the right way to do this, but at least I explored options.
So please, what's the most suitable configuration to do live Payments on PaypalExpress with Omnipay ?
Thanks in advance.
You need to set testMode to false, or just leave it out entirely (false is the default).
Security header invalid
This means that you are trying to use test credentials with the production environment (which it sounds like you were).
You don't want to create REST credentials, you need to create API credentials for the standard PayPal NVP API.
PayPal Express requires an API Username, Password, and Signature. These are different from your PayPal account details. You can obtain your API details by logging in to your (live) PayPal account, and clicking Profile > My Selling Tools > API Access > Request/View API Credentials > Request API Signature.