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assistPayEngine.payWeb(Activity caller, AssistPaymentData data, boolean useCamera),
where
caller – Activity, from which the payment process is launched;
data - object, parameters and data required for making a payment;
useCamera - a flag indicating to use the mobile device's camera to read the customer's bank card number or enter the number manually.
After the successful completion of the payment, you can save the buyer's signature using the method: