The image below depicts the transaction lifecycle.

Transaction State	Description
INITIALIZED	This state indicates that the transaction is INITIALIZED.
PENDING	A transaction will be PENDING if it is being processed and the transaction is raised to the appropriate bank for processing.
SUCCESS	This state indicates that the transaction is completed successfully. When a transaction is successful we receive a successful debit notification from the bank. To notify this we trigger and send the success webhook.
FAILED	This state indicates that the transaction has failed. When a transaction has failed we receive a failed debit notification from the bank. To notify this we trigger and send the failed webhook.
CANCELLED	This state indicates that the on-demand transaction is cancelled.

General Pointers

Once the subscription ends,

New transactions cannot be initiated for the subscription.
For the transactions already initiated, it will go to the end state (Success/Failed). The completion of a transaction is independent of the subscription status.