What is the linkage between GSTN and the authorized Banks?

There will be real time two way linkage between
the GSTN and the Core Banking Solution (CBS) of
the Bank. CPIN is automatically routed to the Bank
via electronic string for verification and receiving
payment and a challan identification number (CIN) is
to automatically sent by the Bank to the Common Portal
confirming payment receipt. No manual intervention
will be involved in the process by any one including bank
cashier or teller or the taxpayer.