Jeśli nie masz jeszcze skonfigurowanego pakietu Firebase Admin SDK, postępuj zgodnie z instrukcjami , aby skonfigurować go na serwerze.Firebase Admin SDK
Włączanie interfejsu FCM HTTP v1 API
W konsoli Firebase otwórz
Ustawienia > Ogólne. Następnie kliknij kartę Cloud Messaging.Włącz interfejs Cloud Messaging API.
Autoryzowanie konta usługi z innego projektu
Możesz wysyłać wiadomości w jednym projekcie, „projekcie docelowym”, używając konta usługi w innym projekcie, „projekcie nadawcy”. Dzięki temu możesz scentralizować zarządzanie kontami usług w jednym projekcie, a jednocześnie wysyłać wiadomości w imieniu innych osób. Aby to zrobić, wykonaj te czynności:
W projekcie nadawcy upewnij się, że interfejs Firebase Cloud Messaging API jest włączony. Sprawdź, czy jest włączony w konsoli Firebase, otwierając
Ustawienia > Ogólne. Następnie kliknij kartę Cloud Messaging.W projekcie nadawcy utwórz konto usługi.
W projekcie docelowym przypisz rolę Administrator interfejsu Firebase Cloud Messaging API do adresu e-mail konta usługi. Zrobisz to na stronie Administracja > Uprawnienia w konsoli Google Cloud. Ta rola umożliwia kontu usługi z projektu nadawcy wysyłanie wiadomości do projektu docelowego.
Zainicjuj pakiet SDK za pomocą pliku klucza konta usługi projektu nadawcy i identyfikatora projektu docelowego.
Node.js
import { initializeApp, applicationDefault } from 'firebase-admin/app'; initializeApp({ // The credential is configured to be the sender project's service // account key via the environment variable GOOGLE_APPLICATION_CREDENTIALS credential: applicationDefault(), projectId: '<TARGET_PROJECT_ID>', });Java
FirebaseOptions options = FirebaseOptions.builder() // The credential is configured to be the sender project's service // account key via the environment variable GOOGLE_APPLICATION_CREDENTIALS .setCredentials(GoogleCredentials.getApplicationDefault()) .setProjectId("<TARGET_PROJECT_ID>") .build(); FirebaseApp.initializeApp(options);Python
import firebase_admin app_options = {'projectId': '<TARGET_PROJECT_ID>'} # Initialize with the default credential, i.e. the sender project's service # account key, stored in GOOGLE_APPLICATION_CREDENTIALS default_app = firebase_admin.initialize_app(options=app_options)Go
config := &firebase.Config{ProjectID: "<TARGET_PROJECT_ID>"} // Initialize with the default credential, i.e. the sender project's service // account key, stored in GOOGLE_APPLICATION_CREDENTIALS app, err := firebase.NewApp(context.Background(), config) if err != nil { log.Fatalf("error initializing app: %v\n", err) }C#
FirebaseApp.Create(new AppOptions() { // The credential is configured to be the sender project's service // account key via the environment variable GOOGLE_APPLICATION_CREDENTIALS Credential = GoogleCredential.GetApplicationDefault(), ProjectId = "<TARGET_PROJECT_ID>", });
Wysyłanie wiadomości do określonych urządzeń
Aby wysłać wiadomość do jednego, konkretnego urządzenia, możesz kierować ją na jego identyfikator instalacji Firebase (FID) lub token rejestracji.
Node.js
Używanie identyfikatora FID (zalecane):
// This installation ID comes from the client FCM SDKs.
const fid = 'YOUR_REGISTERED_FID';
const message = {
data: {
score: '850',
time: '2:45'
},
fid: fid
};
// Send a message to the device corresponding to the provided FID.
getMessaging().send(message)
.then((response) => {
// Response is a message ID string.
console.log('Successfully sent message:', response);
})
.catch((error) => {
console.log('Error sending message:', error);
});
Używanie tokena rejestracji (wycofane):
// This registration token comes from the client FCM SDKs.
const registrationToken = 'YOUR_REGISTRATION_TOKEN';
const message = {
data: {
score: '850',
time: '2:45'
},
token: registrationToken
};
// Send a message to the device corresponding to the provided
// registration token.
getMessaging().send(message)
.then((response) => {
// Response is a message ID string.
console.log('Successfully sent message:', response);
})
.catch((error) => {
console.log('Error sending message:', error);
});
Java
Używanie identyfikatora FID (zalecane):
// This installation ID comes from the client FCM SDKs.
String fid = "YOUR_REGISTERED_FID";
// See documentation on defining a message payload.
Message message = Message.builder()
.putData("score", "850")
.putData("time", "2:45")
.setFid(fid)
.build();
// Send a message to the device corresponding to the provided FID.
String response = FirebaseMessaging.getInstance().send(message);
// Response is a message ID string.
System.out.println("Successfully sent message: " + response);
Używanie tokena rejestracji (wycofane):
// This registration token comes from the client FCM SDKs.
String registrationToken = "YOUR_REGISTRATION_TOKEN";
// See documentation on defining a message payload.
Message message = Message.builder()
.putData("score", "850")
.putData("time", "2:45")
.setToken(registrationToken)
.build();
// Send a message to the device corresponding to the provided
// registration token.
String response = FirebaseMessaging.getInstance().send(message);
// Response is a message ID string.
System.out.println("Successfully sent message: " + response);
Python
Używanie identyfikatora FID (zalecane):
# This installation ID comes from the client FCM SDKs.
fid = 'YOUR_REGISTERED_FID'
# See documentation on defining a message payload.
message = messaging.Message(
data={
'score': '850',
'time': '2:45',
},
fid=fid,
)
# Send a message to the device corresponding to the provided FID.
response = messaging.send(message)
# Response is a message ID string.
print('Successfully sent message:', response)
Używanie tokena rejestracji (wycofane):
# This registration token comes from the client FCM SDKs.
registration_token = 'YOUR_REGISTRATION_TOKEN'
# See documentation on defining a message payload.
message = messaging.Message(
data={
'score': '850',
'time': '2:45',
},
token=registration_token,
)
# Send a message to the device corresponding to the provided
# registration token.
response = messaging.send(message)
# Response is a message ID string.
print('Successfully sent message:', response)
Go
Używanie identyfikatora FID (zalecane):
// Obtain a messaging.Client from the App.
ctx := context.Background()
client, err := app.Messaging(ctx)
if err != nil {
log.Fatalf("error getting Messaging client: %v\n", err)
}
// This installation ID comes from the client FCM SDKs.
fid := "YOUR_REGISTERED_FID"
// See documentation on defining a message payload.
message := &messaging.Message{
Data: map[string]string{
"score": "850",
"time": "2:45",
},
Fid: fid,
}
// Send a message to the device corresponding to the provided FID.
response, err := client.Send(ctx, message)
if err != nil {
log.Fatalln(err)
}
// Response is a message ID string.
fmt.Println("Successfully sent message:", response)
Używanie tokena rejestracji (wycofane):
// Obtain a messaging.Client from the App.
ctx := context.Background()
client, err := app.Messaging(ctx)
if err != nil {
log.Fatalf("error getting Messaging client: %v\n", err)
}
// This registration token comes from the client FCM SDKs.
registrationToken := "YOUR_REGISTRATION_TOKEN"
// See documentation on defining a message payload.
message := &messaging.Message{
Data: map[string]string{
"score": "850",
"time": "2:45",
},
Token: registrationToken,
}
// Send a message to the device corresponding to the provided
// registration token.
response, err := client.Send(ctx, message)
if err != nil {
log.Fatalln(err)
}
// Response is a message ID string.
fmt.Println("Successfully sent message:", response)
C#
Używanie identyfikatora FID (zalecane):
// This installation ID comes from the client FCM SDKs.
var fid = "YOUR_REGISTERED_FID";
var message = new Message()
{
Data = new Dictionary<string, string>()
{
{ "score", "850" },
{ "time", "2:45" },
},
Fid = fid,
};
// Send a message to the device corresponding to the provided FID.
string response = await FirebaseMessaging.DefaultInstance.SendAsync(message);
// Response is a message ID string.
Console.WriteLine("Successfully sent message: " + response);
Używanie tokena rejestracji (wycofane):
// This registration token comes from the client FCM SDKs.
var registrationToken = "YOUR_REGISTRATION_TOKEN";
// See documentation on defining a message payload.
var message = new Message()
{
Data = new Dictionary<string, string>()
{
{ "score", "850" },
{ "time", "2:45" },
},
#pragma warning disable CS0618
Token = registrationToken,
#pragma warning restore CS0618
};
// Send a message to the device corresponding to the provided
// registration token.
string response = await FirebaseMessaging.DefaultInstance.SendAsync(message);
// Response is a message ID string.
Console.WriteLine("Successfully sent message: " + response);
W przypadku powodzenia każda metoda wysyłania zwraca identyfikator wiadomości. Firebase Admin SDK zwraca
ciąg identyfikatora w formacie projects/{project_id}/messages/{message_id}.
Wysyłanie jednej wiadomości do wielu urządzeń
Pakiety Admin FCM SDK umożliwiają wysyłanie wiadomości do listy identyfikatorów instalacji Firebase (FID) lub tokenów rejestracji urządzeń. Możesz użyć tej funkcji, gdy musisz wysłać tę samą wiadomość do dużej liczby urządzeń. W jednym wywołaniu możesz określić maksymalnie 500 identyfikatorów FID lub tokenów.
Wartość zwracana zawiera listę odpowiedzi, która odpowiada kolejności docelowych danych wejściowych, identyfikatorów FID lub tokenów. Jest to przydatne, gdy chcesz sprawdzić, które cele spowodowały błędy. Jeśli podasz zarówno tokeny, jak i identyfikatory FID, najpierw zostaną przetworzone tokeny, a potem identyfikatory FID.
Node.js
Używanie identyfikatorów FID (zalecane):
// These Firebase Installation IDs (FIDs) come from the client FCM SDKs.
const fids = [
'YOUR_REGISTERED_FID_1',
// ...
'YOUR_REGISTERED_FID_N'
];
const message = {
data: {score: '850', time: '2:45'},
fids: fids,
};
getMessaging().sendEachForMulticast(message)
.then((response) => {
console.log(response.successCount + ' messages were sent successfully');
if (response.failureCount > 0) {
const failedFids = [];
response.responses.forEach((resp, idx) => {
if (!resp.success) {
failedFids.push(fids[idx]);
}
});
console.log('List of FIDs that caused failures: ' + failedFids);
}
});
Używanie tokenów rejestracji (wycofane):
// These registration tokens come from the client FCM SDKs.
const registrationTokens = [
'YOUR_REGISTRATION_TOKEN_1',
// …
'YOUR_REGISTRATION_TOKEN_N',
];
const message = {
data: {score: '850', time: '2:45'},
tokens: registrationTokens,
};
getMessaging().sendEachForMulticast(message)
.then((response) => {
if (response.failureCount > 0) {
const failedTokens = [];
response.responses.forEach((resp, idx) => {
if (!resp.success) {
failedTokens.push(registrationTokens[idx]);
}
});
console.log('List of tokens that caused failures: ' + failedTokens);
}
});
Java
Używanie identyfikatorów FID (zalecane):
// These Firebase Installation IDs (FIDs) come from the client FCM SDKs.
List<String> fids = Arrays.asList(
"YOUR_REGISTERED_FID_1",
// ...
"YOUR_REGISTERED_FID_N"
);
MulticastMessage message = MulticastMessage.builder()
.putData("score", "850")
.putData("time", "2:45")
.addAllFids(fids)
.build();
BatchResponse response = FirebaseMessaging.getInstance().sendEachForMulticast(message);
if (response.getFailureCount() > 0) {
List<SendResponse> responses = response.getResponses();
List<String> failedFids = new ArrayList<>();
for (int i = 0; i < responses.size(); i++) {
if (!responses.get(i).isSuccessful()) {
// The order of responses corresponds to the order of the destination FIDs.
failedFids.add(fids.get(i));
}
}
System.out.println("List of FIDs that caused failures: " + failedFids);
}
Używanie tokenów rejestracji (wycofane):
// These registration tokens come from the client FCM SDKs.
List<String> registrationTokens = Arrays.asList(
"YOUR_REGISTRATION_TOKEN_1",
// ...
"YOUR_REGISTRATION_TOKEN_n"
);
MulticastMessage message = MulticastMessage.builder()
.putData("score", "850")
.putData("time", "2:45")
.addAllTokens(registrationTokens)
.build();
BatchResponse response = FirebaseMessaging.getInstance().sendEachForMulticast(message);
if (response.getFailureCount() > 0) {
List<SendResponse> responses = response.getResponses();
List<String> failedTokens = new ArrayList<>();
for (int i = 0; i < responses.size(); i++) {
if (!responses.get(i).isSuccessful()) {
// The order of responses corresponds to the order of the registration tokens.
failedTokens.add(registrationTokens.get(i));
}
}
System.out.println("List of tokens that caused failures: " + failedTokens);
}
Python
Używanie identyfikatorów FID (zalecane):
# These Firebase Installation IDs (FIDs) come from the client FCM SDKs.
fids = [
'YOUR_REGISTERED_FID_1',
# ...
'YOUR_REGISTERED_FID_N',
]
message = messaging.MulticastMessage(
data={'score': '850', 'time': '2:45'},
fids=fids,
)
response = messaging.send_each_for_multicast(message)
if response.failure_count > 0:
responses = response.responses
failed_fids = []
for idx, resp in enumerate(responses):
if not resp.success:
# The order of responses corresponds to the order of the destination FIDs.
failed_fids.append(fids[idx])
print('List of FIDs that caused failures: {0}'.format(failed_fids))
Używanie tokenów rejestracji (wycofane):
# These registration tokens come from the client FCM SDKs.
registration_tokens = [
'YOUR_REGISTRATION_TOKEN_1',
# ...
'YOUR_REGISTRATION_TOKEN_N',
]
message = messaging.MulticastMessage(
data={'score': '850', 'time': '2:45'},
tokens=registration_tokens,
)
response = messaging.send_each_for_multicast(message)
if response.failure_count > 0:
responses = response.responses
failed_tokens = []
for idx, resp in enumerate(responses):
if not resp.success:
# The order of responses corresponds to the order of the registration tokens.
failed_tokens.append(registration_tokens[idx])
print(f'List of tokens that caused failures: {failed_tokens}')
Go
Używanie identyfikatorów FID (zalecane):
// Create a list containing up to 500 Firebase Installation IDs (FIDs).
// These Firebase Installation IDs (FIDs) come from the client FCM SDKs.
fids := []string{
"YOUR_REGISTERED_FID_1",
// ...
"YOUR_REGISTERED_FID_N",
}
message := &messaging.MulticastMessage{
Data: map[string]string{
"score": "850",
"time": "2:45",
},
Fids: fids,
}
br, err := client.SendEachForMulticast(ctx, message)
if err != nil {
log.Fatalln(err)
}
if br.FailureCount > 0 {
var failedFids []string
for idx, resp := range br.Responses {
if !resp.Success {
// The order of responses corresponds to the order of the destination FIDs.
failedFids = append(failedFids, fids[idx])
}
}
fmt.Printf("List of FIDs that caused failures: %v\n", failedFids)
}
Używanie tokenów rejestracji (wycofane):
// Create a list containing up to 500 registration tokens.
// This registration tokens come from the client FCM SDKs.
registrationTokens := []string{
"YOUR_REGISTRATION_TOKEN_1",
// ...
"YOUR_REGISTRATION_TOKEN_n",
}
message := &messaging.MulticastMessage{
Data: map[string]string{
"score": "850",
"time": "2:45",
},
Tokens: registrationTokens,
}
br, err := client.SendEachForMulticast(context.Background(), message)
if err != nil {
log.Fatalln(err)
}
if br.FailureCount > 0 {
var failedTokens []string
for idx, resp := range br.Responses {
if !resp.Success {
// The order of responses corresponds to the order of the registration tokens.
failedTokens = append(failedTokens, registrationTokens[idx])
}
}
fmt.Printf("List of tokens that caused failures: %v\n", failedTokens)
}
C#
Używanie identyfikatorów FID (zalecane):
// These Firebase Installation IDs (FIDs) come from the client FCM SDKs.
var fids = new List<string>()
{
"YOUR_REGISTERED_FID_1",
// ...
"YOUR_REGISTERED_FID_N",
};
var message = new MulticastMessage()
{
Data = new Dictionary<string, string>()
{
{ "score", "850" },
{ "time", "2:45" },
},
Fids = fids,
};
var response = await FirebaseMessaging.DefaultInstance.SendEachForMulticastAsync(message);
if (response.FailureCount > 0)
{
var failedFids = new List<string>();
for (var i = 0; i < response.Responses.Count; i++)
{
if (!response.Responses[i].IsSuccess)
{
// The order of responses corresponds to the order of the destination FIDs.
failedFids.add(fids[i]);
}
}
Console.WriteLine($"List of FIDs that caused failures: {string.Join(", ", failedFids)}");
}
Używanie tokenów rejestracji (wycofane):
// These registration tokens come from the client FCM SDKs.
var registrationTokens = new List<string>()
{
"YOUR_REGISTRATION_TOKEN_1",
// ...
"YOUR_REGISTRATION_TOKEN_n",
};
var message = new MulticastMessage()
{
#pragma warning disable CS0618
Tokens = registrationTokens,
#pragma warning restore CS0618
Data = new Dictionary<string, string>()
{
{ "score", "850" },
{ "time", "2:45" },
},
};
var response = await FirebaseMessaging.DefaultInstance.SendEachForMulticastAsync(message);
if (response.FailureCount > 0)
{
var failedTokens = new List<string>();
for (var i = 0; i < response.Responses.Count; i++)
{
if (!response.Responses[i].IsSuccess)
{
// The order of responses corresponds to the order of the registration tokens.
failedTokens.Add(registrationTokens[i]);
}
}
Console.WriteLine($"List of tokens that caused failures: {failedTokens}");
}
Wysyłanie listy wiadomości
Pakiety Admin SDK obsługują wysyłanie listy zawierającej maksymalnie 500 wiadomości. Ta funkcja może być używana do tworzenia niestandardowych zestawów wiadomości i wysyłania ich do różnych odbiorców, w tym do tematów, identyfikatorów instalacji Firebase (FID) lub tokenów rejestracji urządzeń. Możesz na przykład użyć tej funkcji, gdy musisz wysłać różne wiadomości do różnych odbiorców.
Node.js
Używanie mieszanych celów (zalecane):
// Create a list containing up to 500 messages.
const messages = [
{
notification: { title: 'Price drop', body: '5% off all electronics' },
fid: 'YOUR_REGISTERED_FID', // Using FID (Recommended)
},
{
notification: { title: 'Price drop', body: '2% off all books' },
token: 'YOUR_REGISTRATION_TOKEN', // Using token (Deprecated)
},
{
notification: { title: 'Price drop', body: '10% off all shoes' },
topic: 'readers-club',
}
];
getMessaging().sendEach(messages)
.then((response) => {
console.log(response.successCount + ' messages were sent successfully');
});
Używanie tokenów rejestracji (wycofane):
// Create a list containing up to 500 messages.
const messages = [];
messages.push({
notification: { title: 'Price drop', body: '5% off all electronics' },
token: registrationToken,
});
messages.push({
notification: { title: 'Price drop', body: '2% off all books' },
topic: 'readers-club',
});
getMessaging().sendEach(messages)
.then((response) => {
console.log(response.successCount + ' messages were sent successfully');
});
Java
Używanie mieszanych celów (zalecane):
// Create a list containing up to 500 messages.
List<Message> messages = new ArrayList<>();
messages.add(Message.builder()
.setNotification(Notification.builder()
.setTitle("Price drop")
.setBody("5% off all electronics")
.build())
.setFid("YOUR_REGISTERED_FID") // Using FID (Recommended)
.build());
messages.add(Message.builder()
.setNotification(Notification.builder()
.setTitle("Price drop")
.setBody("2% off all books")
.build())
.setToken("YOUR_REGISTRATION_TOKEN") // Using token (Deprecated)
.build());
messages.add(Message.builder()
.setNotification(Notification.builder()
.setTitle("Price drop")
.setBody("10% off all shoes")
.build())
.setTopic("readers-club")
.build());
BatchResponse response = FirebaseMessaging.getInstance().sendEach(messages);
// See the BatchResponse reference documentation
// for the contents of response.
System.out.println(response.getSuccessCount() + " messages were sent successfully");
Używanie tokenów rejestracji (wycofane):
// Create a list containing up to 500 messages.
List<Message> messages = Arrays.asList(
Message.builder()
.setNotification(Notification.builder()
.setTitle("Price drop")
.setBody("5% off all electronics")
.build())
.setToken(registrationToken)
.build(),
// ...
Message.builder()
.setNotification(Notification.builder()
.setTitle("Price drop")
.setBody("2% off all books")
.build())
.setTopic("readers-club")
.build()
);
BatchResponse response = FirebaseMessaging.getInstance().sendEach(messages);
// See the BatchResponse reference documentation
// for the contents of response.
System.out.println(response.getSuccessCount() + " messages were sent successfully");
Python
Używanie mieszanych celów (zalecane):
# Create a list containing up to 500 messages.
messages = [
messaging.Message(
notification=messaging.Notification('Price drop', '5% off all electronics'),
fid='YOUR_REGISTERED_FID', # Using FID (Recommended)
),
messaging.Message(
notification=messaging.Notification('Price drop', '2% off all books'),
token='YOUR_REGISTRATION_TOKEN', # Using token (Deprecated)
),
messaging.Message(
notification=messaging.Notification('Price drop', '10% off all shoes'),
topic='readers-club',
),
]
response = messaging.send_each(messages)
# See the BatchResponse reference documentation
# for the contents of response.
print('{0} messages were sent successfully'.format(response.success_count))
Używanie tokenów rejestracji (wycofane):
# Create a list containing up to 500 messages.
messages = [
messaging.Message(
notification=messaging.Notification('Price drop', '5% off all electronics'),
token=registration_token,
),
# ...
messaging.Message(
notification=messaging.Notification('Price drop', '2% off all books'),
topic='readers-club',
),
]
response = messaging.send_each(messages)
# See the BatchResponse reference documentation
# for the contents of response.
print(f'{response.success_count} messages were sent successfully')
Go
Używanie mieszanych celów (zalecane):
// Create a list containing up to 500 messages.
messages := []*messaging.Message{
{
Notification: &messaging.Notification{
Title: "Price drop",
Body: "5% off all electronics",
},
Fid: "YOUR_REGISTERED_FID", // Using FID (Recommended)
},
{
Notification: &messaging.Notification{
Title: "Price drop",
Body: "2% off all books",
},
Token: "YOUR_REGISTRATION_TOKEN", // Using token (Deprecated)
},
{
Notification: &messaging.Notification{
Title: "Price drop",
Body: "10% off all shoes",
},
Topic: "readers-club",
},
}
br, err := client.SendEach(ctx, messages)
if err != nil {
log.Fatalln(err)
}
// See the BatchResponse reference documentation
// for the contents of response.
fmt.Printf("%d messages were sent successfully\n", br.SuccessCount)
Używanie tokenów rejestracji (wycofane):
// Create a list containing up to 500 messages.
messages := []*messaging.Message{
{
Notification: &messaging.Notification{
Title: "Price drop",
Body: "5% off all electronics",
},
Token: registrationToken,
},
{
Notification: &messaging.Notification{
Title: "Price drop",
Body: "2% off all books",
},
Topic: "readers-club",
},
}
br, err := client.SendEach(context.Background(), messages)
if err != nil {
log.Fatalln(err)
}
// See the BatchResponse reference documentation
// for the contents of response.
fmt.Printf("%d messages were sent successfully\n", br.SuccessCount)
C#
Używanie mieszanych celów (zalecane):
// Create a list containing up to 500 messages.
var messages = new List<Message>()
{
new Message()
{
Notification = new Notification()
{
Title = "Price drop",
Body = "5% off all electronics",
},
Fid = "YOUR_REGISTERED_FID", // Using FID (Recommended)
},
new Message()
{
Notification = new Notification()
{
Title = "Price drop",
Body = "2% off all books",
},
Token = "YOUR_REGISTRATION_TOKEN", // Using token (Deprecated)
},
new Message()
{
Notification = new Notification()
{
Title = "Price drop",
Body = "10% off all shoes",
},
Topic = "readers-club",
},
};
var response = await FirebaseMessaging.DefaultInstance.SendEachAsync(messages);
// See the BatchResponse reference documentation
// for the contents of response.
Console.WriteLine($"{response.SuccessCount} messages were sent successfully");
Używanie tokenów rejestracji (wycofane):
// Create a list containing up to 500 messages.
var messages = new List<Message>()
{
new Message()
{
Notification = new Notification()
{
Title = "Price drop",
Body = "5% off all electronics",
},
#pragma warning disable CS0618
Token = registrationToken,
#pragma warning restore CS0618
},
new Message()
{
Notification = new Notification()
{
Title = "Price drop",
Body = "2% off all books",
},
Topic = "readers-club",
},
};
var response = await FirebaseMessaging.DefaultInstance.SendEachAsync(messages);
// See the BatchResponse reference documentation
// for the contents of response.
Console.WriteLine($"{response.SuccessCount} messages were sent successfully");