Requirements:
To use the extension, you need to make sure your server has:
Curl 7.34.0 or more recent
PHP 5.4.0 or more recent
OpenSSL v1.0.1 or more recent
To make collections on your OpenCart store via Flutterwave, you should:
Download the plugin version that is compatible with your installation.
Open the Payments Section in your admin area
Click Install on Flutterwave from the list of payment providers.
Enter your API keys.
Enable to Flutterwave
Save your changes.

Features:
Collections: Card, Account, Mobile money, Bank Transfers, USSD, Barter, Applepay, GooglePay and more.
Recurring payments: Tokenization and Subscriptions.
Split payments: Split payments between multiple recipients.