Overview
topropay packages as an OpenCart payment extension (.ocmod.zip). It registers under Extensions → Payments and uses OpenCart's native order state machine — captured payments transition orders to Processing, refunds to Refunded.
What you get
- Works on OpenCart 3.x and 4.x
- Uses native ocmod packaging — no core file modifications
- Refunds from the OpenCart order screen route back through the original acquirer
- Multi-store aware (one keypair per store)
Install in 3 steps
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Install the extension
Extensions → Installer → upload topropay.ocmod.zip. Then go to Extensions → Payments and click Install next to topropay.
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Edit and configure
Click Edit on the topropay row. Paste your API keys, choose the routing strategy and order statuses to map.
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Place a test order
Switch on sandbox and run an end-to-end checkout. Verify the order moves through the expected statuses.