Getting 400 Server Error on push notifications

[omersajid9]

My frontend is configured properly and it gets notifications from the expo push notifications tool. When I use my backend, I get a 400 server error. I get a ServerErr("Request failed: 400 Bad Request"). Here is my code to send push notifications on backend:

use expo_push_notification_client::{Expo, ExpoClientOptions, ExpoPushMessage};
async fn send_push_notifications(push_tokens: Vec<String>) -> Result<(), Box<dyn std::error::Error>> {
     // Initialize the Expo client
     let expo = Expo::new(ExpoClientOptions { access_token: None });

     println!("PUSH NOTIFICATIONS TO {:?}", push_tokens);
     // Build Expo Push Message with detailed configurations
     let expo_push_message = ExpoPushMessage::builder(push_tokens)
         .body("body")
         .data(&[("data".to_string())])?
         .ttl(100)
         .priority("high")
         .subtitle("subtitle")
         .sound("default")
         .badge(1)
         .channel_id("channel_id")
         .category_id("category_id")
         .mutable_content(true)
         .title("title")
         .build()?;
     let tickets = expo.send_push_notifications(expo_push_message).await;
     
     match tickets {
         Ok(receipts) => println!("PUSH NOTIFICATIONS TICKETS {:?}", receipts),
         Err(e) => eprintln!("Failed to send push notifications: {:?}", e),
     }
     Ok(())
 }

Any help would be really appreciated.

[katayama8000]

@omersajid9

I encountered the same error.
I believe this code should work. You can use it for now.

async fn send_push_notifications(
    push_tokens: Vec<String>,
) -> Result<(), Box<dyn std::error::Error>> {
    // Initialize the Expo client
    let expo = Expo::new(ExpoClientOptions { access_token: None });

    println!("PUSH NOTIFICATIONS TO {:?}", push_tokens);

    #[derive(Serialize)]
    struct Data {
        data: String,
    }

    // Build Expo Push Message with detailed configurations
    let expo_push_message = ExpoPushMessage::builder(push_tokens)
        .body("body")
        .data(&Data {
            data: "data".to_string(),
        })?
        .ttl(100)
        .priority("high")
        .subtitle("subtitle")
        .sound("default")
        .badge(1)
        .channel_id("channel_id")
        .category_id("category_id")
        .mutable_content(true)
        .title("title")
        .build()?;
    let tickets = expo.send_push_notifications(expo_push_message).await;

    match tickets {
        Ok(receipts) => println!("PUSH NOTIFICATIONS TICKETS {:?}", receipts),
        Err(e) => eprintln!("Failed to send push notifications: {:?}", e),
    }
    Ok(())
}

I’ll work on a fix.
Thank you for reporting this issue :).