In order to start accepting LiqPay payment for your products, you need to configure the list of payment systems - https://smartpayment.pro/app/profile/edit

Mark "Enable payment in LiqPay":

After that, you must fullfil all required fields:

In order to get the "Public key" and " Secret key":
Log in to your LiqPay account - https://www.liqpay.com/
And go into the "Business" tab:

Then click on the "Settings" below the name of your store:

From there, navigate to the API section and click "Show" next to the private key:

Copy your"Public key" and " Secret key"and paste them in the corresponding fields inside of Smart Payment.
Fill out other required fields and click " Save":

After that, when you order, you will receive a payment method "LiqPay":

In order to check whether you have set everything up correctly, click on the "Pay" button and you should be redirected to the LiqPay payment page:
Now you can accept payment via LiqPay!
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If you have any questions, please contact support.
Sincerely, Smart Payment Team!