An extension to add integration with 24Pay Payment Gateway
Copy TwentyFourPay to [magento]/app/code (create directory [magento]/app/code, if it doesn't exist)
php bin/magento setup:upgrade; php bin/magento setup:di:compile; php bin/magento setup:static-content:deploy -f; php bin/magento cache:clean; php bin/magento cache:flush
Stores --> Configuration --> Sales -> Payment methods (https://[url]/admin/admin/system_config/edit/section/payment/key/[token]) --> 24Pay Payment Gateway