Create custom payment gateway in Magento 2?

Question

Which class we need to extends,implement interface and method use when create a custom payment gateway.

Answer 1

Check magento sample module for payment gateway

For more detail check magento devdocs

Most important part is Facade Configuration. Check from here: https://devdocs.magento.com/guides/v2.3/payments-integrations/base-integration/facade-configuration.html

OxiPay module is developed using payment gateway. and this is simple module. https://github.com/oxipay/oxipay-magento-2.x