This will explain how to use One Signal to set up push notifications
First, you will need to create a certificate from Apple for iOS. Click on your app in the identifiers list in the Apple Developer Portal and then scroll down to configure a push certificate.
You will need to generate a Certificate Signing Request for Apple, use the following command
openssl genrsa -out myprivate.key 2048
openssl req -new -key myprivate.key -out csr.certSigningRequest
Fill Prompts with this info:
Country Name (2 letter code) []: US
State or Province Name (full name) []: United States
Locality Name (eg, city) []:
Organization Name (eg, company) []: Apple Inc.
Organizational Unit Name (eg, section) []: Apple Worldwide Developer Relations
Common Name (eg, fully qualified host name) []: Apple Worldwide Developer Relations Certification Authority
Email Address []: your-email
You will then be asked for a challenge password, which you will need in the next step.
Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:
Upload new CSR to download a .cer file from Apple, then convert to .p12, remember the password!
openssl x509 -inform DER -outform PEM -in <CERTIFICATE>.cer -out cert.pem
openssl pkcs12 -inkey myprivate.key -in cert.pem -export -out cert.p12
Now go to OneSignal and create a new app. Choose iOS as the platform first. Upload your new .p12 certificate, using the password I told you to remember.
Use the App ID it gives you and add this key to your app .env file.
ONE_SIGNAL_KEY=<key>