{"componentChunkName":"component---src-templates-documentation-tsx","path":"/messaging/server-integration","result":{"data":{"mdx":{"body":"var _excluded = [\"components\"];\nfunction _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }\nfunction _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }\nfunction _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }\n/* @jsxRuntime classic */\n/* @jsx mdx */\n\nvar _frontmatter = {\n  \"title\": \"Server Integration\",\n  \"description\": \"Integrate Firebase Cloud Messaging with your backend server.\",\n  \"next\": \"/storage/usage\",\n  \"previous\": \"/messaging/ios-notification-images\"\n};\nvar layoutProps = {\n  _frontmatter: _frontmatter\n};\nvar MDXLayout = \"wrapper\";\nreturn function MDXContent(_ref) {\n  var components = _ref.components,\n    props = _objectWithoutProperties(_ref, _excluded);\n  return mdx(MDXLayout, _extends({}, layoutProps, props, {\n    components: components,\n    mdxType: \"MDXLayout\"\n  }), mdx(\"p\", null, \"The Cloud Messaging module provides the tools required to enable you to send custom messages directly from your own servers.\\nFor example, you could send a FCM message to a specific device when a new chat message is saved to your database\\nand display a \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"/messaging/notifications\"\n  }, \"notification\"), \" or update local device storage so the message is instantly available.\"), mdx(\"p\", null, \"Firebase provides a number of SDKs in different languages such as \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://www.npmjs.com/package/firebase-admin\"\n  }, \"Node.JS\"), \",\\n\", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://firebase.google.com/docs/reference/admin/java/reference/com/google/firebase/messaging/package-summary\"\n  }, \"Java\"), \",\\n\", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://firebase.google.com/docs/reference/admin/python/firebase_admin.messaging\"\n  }, \"Python\"), \",\\n\", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://firebase.google.com/docs/reference/admin/dotnet/namespace/firebase-admin/messaging\"\n  }, \"C#\"), \" and\\n\", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://godoc.org/firebase.google.com/go/messaging\"\n  }, \"Go\"), \". It also supports sending messages over\\n\", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages\"\n  }, \"HTTP\"), \". These methods allow you to send messages\\ndirectly to your user's devices via the FCM servers.\"), mdx(\"h2\", {\n    \"id\": \"device-tokens\"\n  }, \"Device tokens\"), mdx(\"p\", null, \"To send a message to a device, you must access its unique token. A token is automatically generated by the device and\\ncan be accessed using the Cloud Messaging module. The token should be saved inside of your systems data-store and should\\nbe easily accessible when required.\"), mdx(\"p\", null, \"The examples below use a \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"/firestore\"\n  }, \"Cloud Firestore\"), \" database to store and manage the tokens, and \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"/auth\"\n  }, \"Authentication\"), \"\\nto manage the users identity. You can however use any datastore or authentication method of your choice.\"), mdx(\"blockquote\", null, mdx(\"p\", {\n    parentName: \"blockquote\"\n  }, \"If using iOS, ensure you have read and followed the steps in \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"/messaging#ios---registering-devices-with-fcm\"\n  }, \"registered with FCM\"), \" and \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"#ios---requesting-permissions\"\n  }, \"requested user permission\"), \" before trying to receive messages!\")), mdx(\"h2\", {\n    \"id\": \"saving-tokens\"\n  }, \"Saving tokens\"), mdx(\"p\", null, \"Once your application has started, you can call the \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"getToken\"), \" method on the Cloud Messaging module to get the unique\\ndevice token (if using a different push notification provider, such as Amazon SNS, you will need to call \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"getAPNSToken\"), \" on iOS):\"), mdx(\"pre\", {\n    \"className\": \"language-jsx\"\n  }, mdx(\"code\", {\n    parentName: \"pre\",\n    \"className\": \"language-jsx\"\n  }, mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword module\"\n  }, \"import\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token maybe-class-name\"\n  }, \"React\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \" useEffect \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword module\"\n  }, \"from\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'react'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token 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\"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// If using other push notification providers (ie Amazon SNS, etc)\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// you may need to get the APNs token instead for iOS:\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// if(Platform.OS == 'ios') { messaging().getAPNSToken().then(token => { return saveTokenToDatabase(token); }); }\"), \"\\n\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// Listen to whether the token changes\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"return\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token function\"\n  }, \"messaging\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"onTokenRefresh\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token parameter\"\n  }, \"token\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token arrow operator\"\n  }, \"=>\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n      \", 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\"className\": \"token punctuation\"\n  }, \"[\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"]\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), \"\\n\")), mdx(\"p\", null, \"The above code snippet has a single purpose; storing the device FCM token on a remote database. The \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"useEffect\"), \" is fired\\nwhen the \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"App\"), \" component runs and immediately gets the token. It also listens to any events when the device automatically refreshes\\nthe token.\"), mdx(\"p\", null, \"Inside of the \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"saveTokenToDatabase\"), \" method, we store the token on a record specifically relating to the current user. You may also\\nnotice that the token is being added via the \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"FieldValue.arrayUnion\"), \" method. A user can have more than one token (for example using 2 devices)\\nso it's important to ensure that we store all tokens in the database.\"), mdx(\"h2\", {\n    \"id\": \"using-tokens\"\n  }, \"Using tokens\"), mdx(\"p\", null, \"With the tokens stored in a secure datastore, we now have the ability to send messages via FCM to those devices.\"), mdx(\"blockquote\", null, mdx(\"p\", {\n    parentName: \"blockquote\"\n  }, \"The following example uses the Node.JS \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"firebase-admin\"), \" package to send messages to our devices, however any SDK (listed above)\\ncan be used.\")), mdx(\"p\", null, \"Go ahead and setup the \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://www.npmjs.com/package/firebase-admin\"\n  }, mdx(\"inlineCode\", {\n    parentName: \"a\"\n  }, \"firebase-tools\")), \" library on your server environment.\\nOnce setup, our script needs to perform two actions:\"), mdx(\"ol\", null, mdx(\"li\", {\n    parentName: \"ol\"\n  }, \"Fetch the tokens required to send the message.\"), mdx(\"li\", {\n    parentName: \"ol\"\n  }, \"Send a data payload to the devices that the tokens are registered to.\")), mdx(\"p\", null, \"Imagine our application being similar to Instagram. Users are able to upload pictures, and other users can \\\"like\\\" those pictures.\\nEach time a post is liked, we want to send a message to the user that uploaded the picture. The code below simulates a function\\nwhich is called with all of the information required when a picture is liked:\"), mdx(\"pre\", {\n    \"className\": \"language-js\"\n  }, mdx(\"code\", {\n    parentName: \"pre\",\n    \"className\": \"language-js\"\n  }, mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// Node.js\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"var\"), \" admin \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token function\"\n  }, \"require\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'firebase-admin'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// ownerId - who owns the picture someone liked\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// userId - id of the user who liked the picture\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// picture - metadata about the picture\"), \"\\n\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"async\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"function\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token function\"\n  }, \"onUserPictureLiked\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token parameter\"\n  }, \"ownerId\", mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" userId\", mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" picture\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// Get the owners details\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" owner \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" admin\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"firestore\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"collection\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'users'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"doc\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"ownerId\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"get\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// Get the users details\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" user \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" admin\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"firestore\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"collection\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'users'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"doc\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"userId\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"get\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"await\"), \" admin\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"messaging\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"sendEachForMulticast\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    tokens\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" owner\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token property-access\"\n  }, \"tokens\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// ['token_1', 'token_2', ...]\"), \"\\n    data\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n      owner\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token known-class-name class-name\"\n  }, \"JSON\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"stringify\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"owner\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n      user\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token known-class-name class-name\"\n  }, \"JSON\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"stringify\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"user\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n      picture\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token known-class-name class-name\"\n  }, \"JSON\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"stringify\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"picture\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n    apns\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n      payload\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n        aps\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n          \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// Required for background/quit data-only messages on iOS\"), \"\\n          \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// Note: iOS frequently will receive the message but decline to deliver it to your app.\"), \"\\n          \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"//           This is an Apple design choice to favor user battery life over data-only delivery\"), \"\\n          \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"//           reliability. It is not under app control, though you may see the behavior in device logs.\"), \"\\n          \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'content-available'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token boolean\"\n  }, \"true\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n          \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// Required for background/quit data-only messages on Android\"), \"\\n          priority\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'high'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n        \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n      \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), \"\\n\")), mdx(\"p\", null, \"Data-only messages are sent as low priority on both Android and iOS and will not trigger the \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"setBackgroundMessageHandler\"), \"\\nby default. To enable this functionality, you must set the \\\"priority\\\" to \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"high\"), \" on Android and enable the\\n\", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"content-available\"), \" flag for iOS in the message payload.\"), mdx(\"blockquote\", null, mdx(\"p\", {\n    parentName: \"blockquote\"\n  }, \"If using the FCM REST API, see the \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://firebase.google.com/docs/cloud-messaging/http-server-ref\"\n  }, \"following documentation\"), \" on setting \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"priority\"), \" and \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"content-available\"), \"!\")), mdx(\"p\", null, \"The \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"data\"), \" property can send an object of key-value pairs totaling \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"4KB\"), \" as string values (hence the \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"JSON.stringify\"), \").\"), mdx(\"p\", null, \"Back within our application, as explained in the \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"/messaging/usage\"\n  }, \"Usage\"), \" documentation, our message handlers will receive a\\n\", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"/reference/messaging/remotemessage\"\n  }, mdx(\"inlineCode\", {\n    parentName: \"a\"\n  }, \"RemoteMessage\")), \" payload containing the message details sent from the server:\"), mdx(\"pre\", {\n    \"className\": \"language-jsx\"\n  }, mdx(\"code\", {\n    parentName: \"pre\",\n    \"className\": \"language-jsx\"\n  }, mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"function\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token function\"\n  }, mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token maybe-class-name\"\n  }, \"App\")), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token function\"\n  }, \"useEffect\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token arrow operator\"\n  }, \"=>\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" unsubscribe \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token function\"\n  }, \"messaging\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"onMessage\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"async\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token parameter\"\n  }, \"remoteMessage\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token arrow operator\"\n  }, \"=>\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n      \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" owner \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token known-class-name class-name\"\n  }, \"JSON\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"parse\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"remoteMessage\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token property-access\"\n  }, \"data\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token property-access\"\n  }, \"owner\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n      \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" user \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token known-class-name class-name\"\n  }, \"JSON\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"parse\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"remoteMessage\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token property-access\"\n  }, \"data\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token property-access\"\n  }, \"user\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n      \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" picture \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token known-class-name class-name\"\n  }, \"JSON\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"parse\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"remoteMessage\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token property-access\"\n  }, \"data\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token property-access\"\n  }, \"picture\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n      \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token console class-name\"\n  }, \"console\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"log\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token template-string\"\n  }, mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token template-punctuation string\"\n  }, \"`\"), mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token string\"\n  }, \"The user \\\"\"), mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token interpolation\"\n  }, mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token interpolation-punctuation punctuation\"\n  }, \"${\"), \"user\", mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token property-access\"\n  }, \"name\"), mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token interpolation-punctuation punctuation\"\n  }, \"}\")), mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token string\"\n  }, \"\\\" liked your picture \\\"\"), mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token interpolation\"\n  }, mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token interpolation-punctuation punctuation\"\n  }, \"${\"), \"picture\", mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token property-access\"\n  }, \"name\"), mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token interpolation-punctuation punctuation\"\n  }, \"}\")), mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token string\"\n  }, \"\\\"\"), mdx(\"span\", {\n    parentName: \"span\",\n    \"className\": \"token template-punctuation string\"\n  }, \"`\")), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"return\"), \" unsubscribe\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"[\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"]\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), \"\\n\")), mdx(\"p\", null, \"Your application code can then handle messages as you see fit; updating local cache, displaying a \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"/messaging/notifications\"\n  }, \"notification\"), \"\\nor updating UI. The possibilities are endless!\"), mdx(\"h2\", {\n    \"id\": \"signing-out-users\"\n  }, \"Signing out users\"), mdx(\"p\", null, \"Firebase Cloud Messaging tokens are associated with the instance of the installed app. By default, only token expiration or uninstalling/reinstalling the app will generate a fresh token.\"), mdx(\"p\", null, \"This means that by default, if your app has users and you allow them to log out and log in on the same app on the same device, the same FCM token will be used for both users. Usually this is not what you want, so you must take care to cycle the FCM token at the same time you handle user logout/login.\"), mdx(\"p\", null, \"How and when you invalidate a token and generate a new one will be specific to your project, but a common pattern is to delete the FCM token during logout and update your back end to remove it, then to fetch the FCM token during login and update your back end systems to associate the new token with the logged in user.\"), mdx(\"p\", null, mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://rnfirebase.io/reference/messaging#deleteToken\"\n  }, \"https://rnfirebase.io/reference/messaging#deleteToken\"), \"\\n\", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://rnfirebase.io/reference/messaging#getToken\"\n  }, \"https://rnfirebase.io/reference/messaging#getToken\")), mdx(\"p\", null, \"Note that when a token is deleted by calling the \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"deleteToken\"), \" method, it is immediately and permanently invalid.\"), mdx(\"h2\", {\n    \"id\": \"send-messages-to-topics\"\n  }, \"Send messages to topics\"), mdx(\"p\", null, \"When devices \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"/messaging/usage#topics\"\n  }, \"subscribe to topics\"), \", you can send messages without specifying/storing any device\\ntokens.\"), mdx(\"p\", null, \"Using the \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"firebase-admin\"), \" Admin SDK as an example, we can send a message to devices subscribed to a topic:\"), mdx(\"pre\", {\n    \"className\": \"language-js\"\n  }, mdx(\"code\", {\n    parentName: \"pre\",\n    \"className\": \"language-js\"\n  }, mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" admin \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token function\"\n  }, \"require\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'firebase-admin'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" message \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n  data\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    type\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'warning'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n    content\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'A new weather warning has been created!'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  topic\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'weather'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\nadmin\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"messaging\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"send\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"message\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"then\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token parameter\"\n  }, \"response\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token arrow operator\"\n  }, \"=>\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token console class-name\"\n  }, \"console\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"log\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'Successfully sent message:'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" response\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"catch\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token parameter\"\n  }, \"error\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token arrow operator\"\n  }, \"=>\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token console class-name\"\n  }, \"console\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"log\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'Error sending message:'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" error\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\")), mdx(\"h2\", {\n    \"id\": \"conditional-topics\"\n  }, \"Conditional topics\"), mdx(\"p\", null, \"To send a message to a combination of topics, specify a condition, which is a boolean expression that specifies the target\\ntopics. For example, the following condition will send messages to devices that are subscribed to \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"weather\"), \" and either \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"news\"), \"\\nor \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"traffic\"), \":\"), mdx(\"pre\", {\n    \"className\": \"language-json\"\n  }, mdx(\"code\", {\n    parentName: \"pre\",\n    \"className\": \"language-json\"\n  }, \"condition\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"\\\"'weather' in topics && ('news' in topics || 'traffic' in topics)\\\"\"), \"\\n\")), mdx(\"p\", null, \"To send a message to this condition, replace the \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"topic\"), \" key with \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"condition\"), \":\"), mdx(\"pre\", {\n    \"className\": \"language-js\"\n  }, mdx(\"code\", {\n    parentName: \"pre\",\n    \"className\": \"language-js\"\n  }, mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" admin \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token function\"\n  }, \"require\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'firebase-admin'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" message \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n  data\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    content\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'New updates are available!'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  condition\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"\\\"'weather' in topics && ('news' in topics || 'traffic' in topics)\\\"\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\nadmin\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"messaging\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"send\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"message\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"then\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token parameter\"\n  }, \"response\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token arrow operator\"\n  }, \"=>\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token console class-name\"\n  }, \"console\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"log\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'Successfully sent message:'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" response\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"catch\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token parameter\"\n  }, \"error\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token arrow operator\"\n  }, \"=>\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token console class-name\"\n  }, \"console\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"log\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'Error sending message:'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" error\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\")), mdx(\"h2\", {\n    \"id\": \"send-messages-with-image\"\n  }, \"Send messages with image\"), mdx(\"p\", null, \"Both the Notifications composer and the FCM API support image links in the message payload.\"), mdx(\"h3\", {\n    \"id\": \"ios\"\n  }, \"iOS\"), mdx(\"p\", null, \"To successfully send an image using the Admin SDK it's important that the \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"ApnsConfig\"), \" options are set:\"), mdx(\"pre\", {\n    \"className\": \"language-js\"\n  }, mdx(\"code\", {\n    parentName: \"pre\",\n    \"className\": \"language-js\"\n  }, mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" payload \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n  notification\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    body\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'This is an FCM notification that displays an image!'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n    title\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'FCM Notification'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token 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{\n    parentName: \"blockquote\"\n  }, \"Check out the \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://firebase.google.com/docs/cloud-messaging/ios/send-image\"\n  }, \"official Firebase documentation\"), \" to see the list of available configuration for iOS.\")), mdx(\"h3\", {\n    \"id\": \"android\"\n  }, \"Android\"), mdx(\"p\", null, \"Similarly to iOS, some configurations specific to Android are needed:\"), mdx(\"pre\", {\n    \"className\": \"language-js\"\n  }, mdx(\"code\", {\n    parentName: \"pre\",\n    \"className\": \"language-js\"\n  }, mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" payload \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n  notification\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    body\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'This is an FCM notification that displays an image!'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n    title\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'FCM Notification'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  android\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    notification\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n      imageUrl\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'image-url'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\")), mdx(\"blockquote\", null, mdx(\"p\", {\n    parentName: \"blockquote\"\n  }, \"If you want to know more about sending an image on Android have a look at \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://firebase.google.com/docs/cloud-messaging/android/send-image\"\n  }, \"the documentation\"), \".\")), mdx(\"h2\", {\n    \"id\": \"pulling-it-all-together\"\n  }, \"Pulling it all together\"), mdx(\"p\", null, \"It's possible to send one notification that will be delivered to both platforms using the Admin SDK:\"), mdx(\"pre\", {\n    \"className\": \"language-js\"\n  }, mdx(\"code\", {\n    parentName: \"pre\",\n    \"className\": \"language-js\"\n  }, mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" admin \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token function\"\n  }, \"require\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'firebase-admin'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// Create a list containing up to 500 registration tokens.\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// These registration tokens come from the client FCM SDKs.\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" registrationTokens \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"[\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'YOUR_REGISTRATION_TOKEN_1'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'YOUR_REGISTRATION_TOKEN_2'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"]\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" message \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n  tokens\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" registrationTokens\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  notification\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    body\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'This is an FCM notification that displays an image!'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n    title\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'FCM Notification'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  apns\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    payload\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n      aps\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n        \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'mutable-content'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token number\"\n  }, \"1\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n      \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n    fcmOptions\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n      imageUrl\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'image-url'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  android\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    notification\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n      imageUrl\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'image-url'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\nadmin\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"messaging\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"sendEachForMulticast\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"message\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"then\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token parameter\"\n  }, \"response\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token arrow operator\"\n  }, \"=>\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token console class-name\"\n  }, \"console\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"log\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'Successfully sent message:'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" response\", 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\"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n    \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token console class-name\"\n  }, \"console\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"log\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'Error sending message:'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" error\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\")), mdx(\"p\", null, \"If you want to read more about building send requests with the Admin SDK check out \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://firebase.google.com/docs/cloud-messaging/send-message\"\n  }, \"this link\"), \".\"));\n}\n;\nMDXContent.isMDXComponent = true;","frontmatter":{"title":"Server Integration","description":"Integrate Firebase Cloud Messaging with your backend server.","icon":null,"noindex":null},"excerpt":"The Cloud Messaging module provides the tools required to enable you to send custom messages directly from your own servers.\nFor example…","tableOfContents":{"items":[{"url":"#device-tokens","title":"Device tokens"},{"url":"#saving-tokens","title":"Saving tokens"},{"url":"#using-tokens","title":"Using tokens"},{"url":"#signing-out-users","title":"Signing out users"},{"url":"#send-messages-to-topics","title":"Send messages to topics"},{"url":"#conditional-topics","title":"Conditional topics"},{"url":"#send-messages-with-image","title":"Send messages with image","items":[{"url":"#ios","title":"iOS"},{"url":"#android","title":"Android"}]},{"url":"#pulling-it-all-together","title":"Pulling it all together"}]},"headings":[{"depth":2,"value":"Device tokens"},{"depth":2,"value":"Saving tokens"},{"depth":2,"value":"Using tokens"},{"depth":2,"value":"Signing out users"},{"depth":2,"value":"Send messages to topics"},{"depth":2,"value":"Conditional topics"},{"depth":2,"value":"Send messages with image"},{"depth":3,"value":"iOS"},{"depth":3,"value":"Android"},{"depth":2,"value":"Pulling it all together"}],"parent":{"__typename":"File","relativePath":"messaging/server-integration.md"}},"next":{"frontmatter":{"title":"Cloud 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