NOT final statuses:

PAYMENT_INITIATED - transaction created
PAYMENT_PROCESSING - customer started to go through the transaction flow
PAYMENT_ACCEPTED - customer's bank accepts the payment
PAYMENT_SUCCESS - customer successfully finishes the payment

FINAL statuses:

PAYMENT_FAILED - unsuccessful payment
PAYMENT_CANCELLED - customer has cancelled the payment
TIMEOUT - payment has expired
AML_BLOCKED - blocked by AML
PAYMENT_COMPLETE - money has arrived
REFUNDED - payment refunded

Note:

In rare instances where the bank sends an incorrect status, you may initially receive a FAILED or CANCELLED notification. Once we confirm receipt of your payment, we will promptly update the status to COMPLETE.