如何使用http API为同一应用程序的不同Firebase数据库发送FCM通知

Question

我有一个APPA。对于该APP A，我有2个Firebase项目C，D。从App A信息中，所有数据都存储在C数据库中。我正在从C数据库获取设备令牌，并在后端将设备令牌发送到数据库D。和存储在数据库D中。我已经实现了所有代码以在数据库D中发送通知。现在我没有收到到应用A的通知。

  

向APP A发送通知的代码。

exports.notifications= functions.https.onRequest((req,res) =>{
    var senderauthid = req.body.SenderAuthID;
    var senderautoid1 = req.body.SenderAutoID;
    var receiveramount = req.body.Amount;
    var receiverauthid = req.body.ReceiverAuthID;
    var receiverFCMToken = req.body.FcmToken;// 

  

我在这里从APP A获取令牌

    console.log("receiverfcm",receiverFCMToken);
    console.log("receiverauthid",receiverauthid);
    console.log("senderautoid1",senderautoid1);
    const db = admin.firestore();
    var cityRef = db.collection('deyaPayUsers').doc(receiverauthid);

var setWithOptions = cityRef.set({
  FCMToken: receiverFCMToken
}, { merge: true });     // Here Iam storing the FCM token in Database D.                                                                                                                                                                                                                                                                                                                                                                                                               

    var senderdetails = db.collection('deyaPayUsers').doc(senderauthid);
    var sendergetinfo = db.runTransaction(drt =>{
        return drt.get(senderdetails)
        .then(doc => {
            var senderphonenumber = doc.data().PhoneNumber;//Sender phonenumber

            const receiverdetails = db.collection('deyaPayUsers').doc(receiverauthid);//receiver details

                    var msg = senderphonenumber +  " "+ "requested you to pay $" +receiveramount;
                    let payload = {       //This is for sending notification message
        notification: {
            title: "Message",
            body:  msg,
            sound: "default",
 },
        'data':{// these is the data it calls in the messagereceived method
                'Amount':String(receiveramount),
                'SenderID':senderauthid,
                'ReceiverId':receiverauthid,
                'SenderPhoneNumber':String(senderphonenumber),
                'SenderAutoId':senderautoid1,
                //'SenderName':Sendertotalname,
                'code':"100",

        }

    };//payload
    console.log(payload);
   return admin.messaging().sendToDevice(receiverFCMToken, payload).then((response)=> { // This method is used for returning the notification to a specific device
    console.log(receiverFCMToken);
      console.info("Successfully sent notification")
      return res.status(200).json({Token : "Successfully sent notification"});
    }).catch(function(error) {
        console.warn("Error sending notification " , error)
        });//end of notification

                //});
            //});//receiverdoc

        });
    });

在日志中，它显示成功发送通知。但是应用程序A没有收到通知。请提供任何解决方案。