Cryptain for OpenCart 4
1. Admin → Extensions → Installer → Upload → choose cryptain.ocmod.zip → click Install (green +).
2. Extensions → Extensions → Payments → Cryptain → Install, then Edit.
3. Enter your Cryptain URL, public key, secret key and webhook secret. Turn Status on and save.
4. In Cryptain (Dashboard → Stores → your store) set the Webhook URL to the address shown at the top of the settings page.
