As an add-on/plugin/ocmod or even vqmod so the invoices sent to customers through OpenCart can be linked to IP and the customers from OpenCart can be saved into IP. Even better if the products could be transferred too.
An API and plugin system will be available in InvoicePlane v2 and then every system can be integrated.
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excellent, thank you.
Please see my topic: API and OpenCart Extension - WIP