VOIP Notifications are not sending using p12

[narendargit]

When I applied p12 certificates properly PKPushRegister(VOIP) notifications are sent and working fine both sender/receiver side for few days using NWPusher, but suddenly stopped receiving notifications, I don't know where the issue occur exactly.
When I try to use same p12 certificate using Pusher Tool, VOIP notifications are properly sent and then I thought that issue is with NWPusher and this NWPusher is not supporting for "p8" certificate to send VOIP notifications.

Please help me in this

[indieshack]

Apple shut down binary APNS a few months ago. The author of this project mentioned in another ticket item that he doesn't plan to update NWPusher to use token APNS. Fortunately there's an easy solution - recommend using APNSSwift, import it as a package dependency in your project, it's dead easy to get up and running as a drop-in replacement to NWPusher functionality with a few lines of code and a P8 certificate.