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Expo Push InvalidPriority error encountered when sending push notifications.

The priority level specified in the push notification payload is not valid.

Understanding Expo Push Notifications

Expo Push Notifications is a service provided by Expo that allows developers to send push notifications to their applications. It is widely used in mobile app development to engage users by sending timely updates, alerts, and information directly to their devices.

Identifying the InvalidPriority Symptom

When working with Expo Push Notifications, you might encounter an error message stating InvalidPriority. This error typically appears when there is an issue with the priority level specified in the notification payload.

Explaining the InvalidPriority Issue

The InvalidPriority error occurs when the priority level set in the push notification payload is not recognized by the Expo Push service. The priority level determines the urgency of the notification and can affect how it is delivered to the user's device.

Common Causes of InvalidPriority

  • Using an unsupported priority level.
  • Typographical errors in the priority field.
  • Misunderstanding of valid priority values.

Steps to Resolve the InvalidPriority Issue

To resolve the InvalidPriority error, follow these steps:

Step 1: Verify Valid Priority Levels

Ensure that you are using one of the valid priority levels supported by Expo Push Notifications. The valid values are:

  • normal
  • high

For more information on priority levels, refer to the Expo Push Notifications documentation.

Step 2: Check Your Payload

Review the payload of your push notification request to ensure that the priority field is correctly set. Here is an example of a properly formatted payload:

{
"to": "ExponentPushToken[xxxxxxxxxxxxxxxxxxxxxx]",
"sound": "default",
"body": "Hello, world!",
"priority": "high"
}

Step 3: Test Your Notification

After making the necessary corrections, test your push notification to ensure it is delivered successfully without any errors. You can use tools like Expo's Notification Tool to test your notifications.

Conclusion

By ensuring that you use valid priority levels and correctly format your notification payload, you can effectively resolve the InvalidPriority error in Expo Push Notifications. This will help you maintain seamless communication with your app users.

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