1
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{"version":3,"file":"firebase-remote-config.js","sources":["../util/src/constants.ts","../util/src/assert.ts","../util/src/environment.ts","../util/src/errors.ts","../util/src/obj.ts","../util/src/exponential_backoff.ts","../util/src/compat.ts","../component/src/component.ts","../logger/src/logger.ts","../../node_modules/idb/build/wrap-idb-value.js","../../node_modules/idb/build/index.js","../installations/src/util/constants.ts","../installations/src/util/errors.ts","../installations/src/functions/common.ts","../installations/src/util/sleep.ts","../installations/src/helpers/generate-fid.ts","../installations/src/helpers/buffer-to-base64-url-safe.ts","../installations/src/util/get-key.ts","../installations/src/helpers/fid-changed.ts","../installations/src/helpers/idb-manager.ts","../installations/src/helpers/get-installation-entry.ts","../installations/src/functions/create-installation-request.ts","../installations/src/functions/generate-auth-token-request.ts","../installations/src/helpers/refresh-auth-token.ts","../installations/src/api/get-token.ts","../installations/src/helpers/extract-app-config.ts","../installations/src/functions/config.ts","../installations/src/api/get-id.ts","../installations/src/index.ts","../remote-config/src/client/remote_config_fetch_client.ts","../remote-config/src/constants.ts","../remote-config/src/errors.ts","../remote-config/src/value.ts","../remote-config/src/api.ts","../remote-config/src/client/caching_client.ts","../remote-config/src/language.ts","../remote-config/src/client/rest_client.ts","../remote-config/src/client/retrying_client.ts","../remote-config/src/remote_config.ts","../remote-config/src/storage/storage.ts","../remote-config/src/storage/storage_cache.ts","../remote-config/src/client/eventEmitter.ts","../remote-config/src/client/visibility_monitor.ts","../remote-config/src/client/realtime_handler.ts","../remote-config/src/api2.ts","../remote-config/src/register.ts","../remote-config/src/index.ts"],"sourcesContent":["/**\n * @license\n * Copyright 2017 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview Firebase constants. Some of these (@defines) can be overridden at compile-time.\n */\n\nexport const CONSTANTS = {\n /**\n * @define {boolean} Whether this is the client Node.js SDK.\n */\n NODE_CLIENT: false,\n /**\n * @define {boolean} Whether this is the Admin Node.js SDK.\n */\n NODE_ADMIN: false,\n\n /**\n * Firebase SDK Version\n */\n SDK_VERSION: '${JSCORE_VERSION}'\n};\n","/**\n * @license\n * Copyright 2017 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { CONSTANTS } from './constants';\n\n/**\n * Throws an error if the provided assertion is falsy\n */\nexport const assert = function (assertion: unknown, message: string): void {\n if (!assertion) {\n throw assertionError(message);\n }\n};\n\n/**\n * Returns an Error object suitable for throwing.\n */\nexport const assertionError = function (message: string): Error {\n return new Error(\n 'Firebase Database (' +\n CONSTANTS.SDK_VERSION +\n ') INTERNAL ASSERT FAILED: ' +\n message\n );\n};\n","/**\n * @license\n * Copyright 2017 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { CONSTANTS } from './constants';\nimport { getDefaults } from './defaults';\n\n/**\n * Type placeholder for `WorkerGlobalScope` from `webworker`\n */\ndeclare class WorkerGlobalScope {}\n\n/**\n * Returns navigator.userAgent string or '' if it's not defined.\n * @return user agent string\n */\nexport function getUA(): string {\n if (\n typeof navigator !== 'undefined' &&\n typeof navigator['userAgent'] === 'string'\n ) {\n return navigator['userAgent'];\n } else {\n return '';\n }\n}\n\n/**\n * Detect Cordova / PhoneGap / Ionic frameworks on a mobile device.\n *\n * Deliberately does not rely on checking `file://` URLs (as this fails PhoneGap\n * in the Ripple emulator) nor Cordova `onDeviceReady`, which would normally\n * wait for a callback.\n */\nexport function isMobileCordova(): boolean {\n return (\n typeof window !== 'undefined' &&\n // @ts-ignore Setting up an broadly applicable index signature for Window\n // just to deal with this case would probably be a bad idea.\n !!(window['cordova'] || window['phonegap'] || window['PhoneGap']) &&\n /ios|iphone|ipod|ipad|android|blackberry|iemobile/i.test(getUA())\n );\n}\n\n/**\n * Detect Node.js.\n *\n * @return true if Node.js environment is detected or specified.\n */\n// Node detection logic from: https://github.com/iliakan/detect-node/\nexport function isNode(): boolean {\n const forceEnvironment = getDefaults()?.forceEnvironment;\n if (forceEnvironment === 'node') {\n return true;\n } else if (forceEnvironment === 'browser') {\n return false;\n }\n\n try {\n return (\n Object.prototype.toString.call(global.process) === '[object process]'\n );\n } catch (e) {\n return false;\n }\n}\n\n/**\n * Detect Browser Environment.\n * Note: This will return true for certain test frameworks that are incompletely\n * mimicking a browser, and should not lead to assuming all browser APIs are\n * available.\n */\nexport function isBrowser(): boolean {\n return typeof window !== 'undefined' || isWebWorker();\n}\n\n/**\n * Detect Web Worker context.\n */\nexport function isWebWorker(): boolean {\n return (\n typeof WorkerGlobalScope !== 'undefined' &&\n typeof self !== 'undefined' &&\n self instanceof WorkerGlobalScope\n );\n}\n\n/**\n * Detect Cloudflare Worker context.\n */\nexport function isCloudflareWorker(): boolean {\n return (\n typeof navigator !== 'undefined' &&\n navigator.userAgent === 'Cloudflare-Workers'\n );\n}\n\n/**\n * Detect browser extensions (Chrome and Firefox at least).\n */\ninterface BrowserRuntime {\n id?: unknown;\n}\ndeclare const chrome: { runtime?: BrowserRuntime };\ndeclare const browser: { runtime?: BrowserRuntime };\nexport function isBrowserExtension(): boolean {\n const runtime =\n typeof chrome === 'object'\n ? chrome.runtime\n : typeof browser === 'object'\n ? browser.runtime\n : undefined;\n return typeof runtime === 'object' && runtime.id !== undefined;\n}\n\n/**\n * Detect React Native.\n *\n * @return true if ReactNative environment is detected.\n */\nexport function isReactNative(): boolean {\n return (\n typeof navigator === 'object' && navigator['product'] === 'ReactNative'\n );\n}\n\n/** Detects Electron apps. */\nexport function isElectron(): boolean {\n return getUA().indexOf('Electron/') >= 0;\n}\n\n/** Detects Internet Explorer. */\nexport function isIE(): boolean {\n const ua = getUA();\n return ua.indexOf('MSIE ') >= 0 || ua.indexOf('Trident/') >= 0;\n}\n\n/** Detects Universal Windows Platform apps. */\nexport function isUWP(): boolean {\n return getUA().indexOf('MSAppHost/') >= 0;\n}\n\n/**\n * Detect whether the current SDK build is the Node version.\n *\n * @return true if it's the Node SDK build.\n */\nexport function isNodeSdk(): boolean {\n return CONSTANTS.NODE_CLIENT === true || CONSTANTS.NODE_ADMIN === true;\n}\n\n/** Returns true if we are running in Safari. */\nexport function isSafari(): boolean {\n return (\n !isNode() &&\n !!navigator.userAgent &&\n navigator.userAgent.includes('Safari') &&\n !navigator.userAgent.includes('Chrome')\n );\n}\n\n/** Returns true if we are running in Safari or WebKit */\nexport function isSafariOrWebkit(): boolean {\n return (\n !isNode() &&\n !!navigator.userAgent &&\n (navigator.userAgent.includes('Safari') ||\n navigator.userAgent.includes('WebKit')) &&\n !navigator.userAgent.includes('Chrome')\n );\n}\n\n/**\n * This method checks if indexedDB is supported by current browser/service worker context\n * @return true if indexedDB is supported by current browser/service worker context\n */\nexport function isIndexedDBAvailable(): boolean {\n try {\n return typeof indexedDB === 'object';\n } catch (e) {\n return false;\n }\n}\n\n/**\n * This method validates browser/sw context for indexedDB by opening a dummy indexedDB database and reject\n * if errors occur during the database open operation.\n *\n * @throws exception if current browser/sw context can't run idb.open (ex: Safari iframe, Firefox\n * private browsing)\n */\nexport function validateIndexedDBOpenable(): Promise<boolean> {\n return new Promise((resolve, reject) => {\n try {\n let preExist: boolean = true;\n const DB_CHECK_NAME =\n 'validate-browser-context-for-indexeddb-analytics-module';\n const request = self.indexedDB.open(DB_CHECK_NAME);\n request.onsuccess = () => {\n request.result.close();\n // delete database only when it doesn't pre-exist\n if (!preExist) {\n self.indexedDB.deleteDatabase(DB_CHECK_NAME);\n }\n resolve(true);\n };\n request.onupgradeneeded = () => {\n preExist = false;\n };\n\n request.onerror = () => {\n reject(request.error?.message || '');\n };\n } catch (error) {\n reject(error);\n }\n });\n}\n\n/**\n *\n * This method checks whether cookie is enabled within current browser\n * @return true if cookie is enabled within current browser\n */\nexport function areCookiesEnabled(): boolean {\n if (typeof navigator === 'undefined' || !navigator.cookieEnabled) {\n return false;\n }\n return true;\n}\n","/**\n * @license\n * Copyright 2017 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/**\n * @fileoverview Standardized Firebase Error.\n *\n * Usage:\n *\n * // TypeScript string literals for type-safe codes\n * type Err =\n * 'unknown' |\n * 'object-not-found'\n * ;\n *\n * // Closure enum for type-safe error codes\n * // at-enum {string}\n * var Err = {\n * UNKNOWN: 'unknown',\n * OBJECT_NOT_FOUND: 'object-not-found',\n * }\n *\n * let errors: Map<Err, string> = {\n * 'generic-error': \"Unknown error\",\n * 'file-not-found': \"Could not find file: {$file}\",\n * };\n *\n * // Type-safe function - must pass a valid error code as param.\n * let error = new ErrorFactory<Err>('service', 'Service', errors);\n *\n * ...\n * throw error.create(Err.GENERIC);\n * ...\n * throw error.create(Err.FILE_NOT_FOUND, {'file': fileName});\n * ...\n * // Service: Could not file file: foo.txt (service/file-not-found).\n *\n * catch (e) {\n * assert(e.message === \"Could not find file: foo.txt.\");\n * if ((e as FirebaseError)?.code === 'service/file-not-found') {\n * console.log(\"Could not read file: \" + e['file']);\n * }\n * }\n */\n\nexport type ErrorMap<ErrorCode extends string> = {\n readonly [K in ErrorCode]: string;\n};\n\nconst ERROR_NAME = 'FirebaseError';\n\nexport interface StringLike {\n toString(): string;\n}\n\nexport interface ErrorData {\n [key: string]: unknown;\n}\n\n// Based on code from:\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error#Custom_Error_Types\nexport class FirebaseError extends Error {\n /** The custom name for all FirebaseErrors. */\n readonly name: string = ERROR_NAME;\n\n constructor(\n /** The error code for this error. */\n readonly code: string,\n message: string,\n /** Custom data for this error. */\n public customData?: Record<string, unknown>\n ) {\n super(message);\n\n // Fix For ES5\n // https://github.com/Microsoft/TypeScript-wiki/blob/master/Breaking-Changes.md#extending-built-ins-like-error-array-and-map-may-no-longer-work\n // TODO(dlarocque): Replace this with `new.target`: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-2-2.html#support-for-newtarget\n // which we can now use since we no longer target ES5.\n Object.setPrototypeOf(this, FirebaseError.prototype);\n\n // Maintains proper stack trace for where our error was thrown.\n // Only available on V8.\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, ErrorFactory.prototype.create);\n }\n }\n}\n\nexport class ErrorFactory<\n ErrorCode extends string,\n ErrorParams extends { readonly [K in ErrorCode]?: ErrorData } = {}\n> {\n constructor(\n private readonly service: string,\n private readonly serviceName: string,\n private readonly errors: ErrorMap<ErrorCode>\n ) {}\n\n create<K extends ErrorCode>(\n code: K,\n ...data: K extends keyof ErrorParams ? [ErrorParams[K]] : []\n ): FirebaseError {\n const customData = (data[0] as ErrorData) || {};\n const fullCode = `${this.service}/${code}`;\n const template = this.errors[code];\n\n const message = template ? replaceTemplate(template, customData) : 'Error';\n // Service Name: Error message (service/code).\n const fullMessage = `${this.serviceName}: ${message} (${fullCode}).`;\n\n const error = new FirebaseError(fullCode, fullMessage, customData);\n\n return error;\n }\n}\n\nfunction replaceTemplate(template: string, data: ErrorData): string {\n return template.replace(PATTERN, (_, key) => {\n const value = data[key];\n return value != null ? String(value) : `<${key}?>`;\n });\n}\n\nconst PATTERN = /\\{\\$([^}]+)}/g;\n","/**\n * @license\n * Copyright 2017 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport function contains<T extends object>(obj: T, key: string): boolean {\n return Object.prototype.hasOwnProperty.call(obj, key);\n}\n\nexport function safeGet<T extends object, K extends keyof T>(\n obj: T,\n key: K\n): T[K] | undefined {\n if (Object.prototype.hasOwnProperty.call(obj, key)) {\n return obj[key];\n } else {\n return undefined;\n }\n}\n\nexport function isEmpty(obj: object): obj is {} {\n for (const key in obj) {\n if (Object.prototype.hasOwnProperty.call(obj, key)) {\n return false;\n }\n }\n return true;\n}\n\nexport function map<K extends string, V, U>(\n obj: { [key in K]: V },\n fn: (value: V, key: K, obj: { [key in K]: V }) => U,\n contextObj?: unknown\n): { [key in K]: U } {\n const res: Partial<{ [key in K]: U }> = {};\n for (const key in obj) {\n if (Object.prototype.hasOwnProperty.call(obj, key)) {\n res[key] = fn.call(contextObj, obj[key], key, obj);\n }\n }\n return res as { [key in K]: U };\n}\n\n/**\n * Deep equal two objects. Support Arrays and Objects.\n */\nexport function deepEqual(a: object, b: object): boolean {\n if (a === b) {\n return true;\n }\n\n const aKeys = Object.keys(a);\n const bKeys = Object.keys(b);\n for (const k of aKeys) {\n if (!bKeys.includes(k)) {\n return false;\n }\n\n const aProp = (a as Record<string, unknown>)[k];\n const bProp = (b as Record<string, unknown>)[k];\n if (isObject(aProp) && isObject(bProp)) {\n if (!deepEqual(aProp, bProp)) {\n return false;\n }\n } else if (aProp !== bProp) {\n return false;\n }\n }\n\n for (const k of bKeys) {\n if (!aKeys.includes(k)) {\n return false;\n }\n }\n return true;\n}\n\nfunction isObject(thing: unknown): thing is object {\n return thing !== null && typeof thing === 'object';\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * The amount of milliseconds to exponentially increase.\n */\nconst DEFAULT_INTERVAL_MILLIS = 1000;\n\n/**\n * The factor to backoff by.\n * Should be a number greater than 1.\n */\nconst DEFAULT_BACKOFF_FACTOR = 2;\n\n/**\n * The maximum milliseconds to increase to.\n *\n * <p>Visible for testing\n */\nexport const MAX_VALUE_MILLIS = 4 * 60 * 60 * 1000; // Four hours, like iOS and Android.\n\n/**\n * The percentage of backoff time to randomize by.\n * See\n * http://go/safe-client-behavior#step-1-determine-the-appropriate-retry-interval-to-handle-spike-traffic\n * for context.\n *\n * <p>Visible for testing\n */\nexport const RANDOM_FACTOR = 0.5;\n\n/**\n * Based on the backoff method from\n * https://github.com/google/closure-library/blob/master/closure/goog/math/exponentialbackoff.js.\n * Extracted here so we don't need to pass metadata and a stateful ExponentialBackoff object around.\n */\nexport function calculateBackoffMillis(\n backoffCount: number,\n intervalMillis: number = DEFAULT_INTERVAL_MILLIS,\n backoffFactor: number = DEFAULT_BACKOFF_FACTOR\n): number {\n // Calculates an exponentially increasing value.\n // Deviation: calculates value from count and a constant interval, so we only need to save value\n // and count to restore state.\n const currBaseValue = intervalMillis * Math.pow(backoffFactor, backoffCount);\n\n // A random \"fuzz\" to avoid waves of retries.\n // Deviation: randomFactor is required.\n const randomWait = Math.round(\n // A fraction of the backoff value to add/subtract.\n // Deviation: changes multiplication order to improve readability.\n RANDOM_FACTOR *\n currBaseValue *\n // A random float (rounded to int by Math.round above) in the range [-1, 1]. Determines\n // if we add or subtract.\n (Math.random() - 0.5) *\n 2\n );\n\n // Limits backoff to max to avoid effectively permanent backoff.\n return Math.min(MAX_VALUE_MILLIS, currBaseValue + randomWait);\n}\n","/**\n * @license\n * Copyright 2021 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport interface Compat<T> {\n _delegate: T;\n}\n\nexport function getModularInstance<ExpService>(\n service: Compat<ExpService> | ExpService\n): ExpService {\n if (service && (service as Compat<ExpService>)._delegate) {\n return (service as Compat<ExpService>)._delegate;\n } else {\n return service as ExpService;\n }\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport {\n InstantiationMode,\n InstanceFactory,\n ComponentType,\n Dictionary,\n Name,\n onInstanceCreatedCallback\n} from './types';\n\n/**\n * Component for service name T, e.g. `auth`, `auth-internal`\n */\nexport class Component<T extends Name = Name> {\n multipleInstances = false;\n /**\n * Properties to be added to the service namespace\n */\n serviceProps: Dictionary = {};\n\n instantiationMode = InstantiationMode.LAZY;\n\n onInstanceCreated: onInstanceCreatedCallback<T> | null = null;\n\n /**\n *\n * @param name The public service name, e.g. app, auth, firestore, database\n * @param instanceFactory Service factory responsible for creating the public interface\n * @param type whether the service provided by the component is public or private\n */\n constructor(\n readonly name: T,\n readonly instanceFactory: InstanceFactory<T>,\n readonly type: ComponentType\n ) {}\n\n setInstantiationMode(mode: InstantiationMode): this {\n this.instantiationMode = mode;\n return this;\n }\n\n setMultipleInstances(multipleInstances: boolean): this {\n this.multipleInstances = multipleInstances;\n return this;\n }\n\n setServiceProps(props: Dictionary): this {\n this.serviceProps = props;\n return this;\n }\n\n setInstanceCreatedCallback(callback: onInstanceCreatedCallback<T>): this {\n this.onInstanceCreated = callback;\n return this;\n }\n}\n","/**\n * @license\n * Copyright 2017 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport type LogLevelString =\n | 'debug'\n | 'verbose'\n | 'info'\n | 'warn'\n | 'error'\n | 'silent';\n\nexport interface LogOptions {\n level: LogLevelString;\n}\n\nexport type LogCallback = (callbackParams: LogCallbackParams) => void;\n\nexport interface LogCallbackParams {\n level: LogLevelString;\n message: string;\n args: unknown[];\n type: string;\n}\n\n/**\n * A container for all of the Logger instances\n */\nexport const instances: Logger[] = [];\n\n/**\n * The JS SDK supports 5 log levels and also allows a user the ability to\n * silence the logs altogether.\n *\n * The order is a follows:\n * DEBUG < VERBOSE < INFO < WARN < ERROR\n *\n * All of the log types above the current log level will be captured (i.e. if\n * you set the log level to `INFO`, errors will still be logged, but `DEBUG` and\n * `VERBOSE` logs will not)\n */\nexport enum LogLevel {\n DEBUG,\n VERBOSE,\n INFO,\n WARN,\n ERROR,\n SILENT\n}\n\nconst levelStringToEnum: { [key in LogLevelString]: LogLevel } = {\n 'debug': LogLevel.DEBUG,\n 'verbose': LogLevel.VERBOSE,\n 'info': LogLevel.INFO,\n 'warn': LogLevel.WARN,\n 'error': LogLevel.ERROR,\n 'silent': LogLevel.SILENT\n};\n\n/**\n * The default log level\n */\nconst defaultLogLevel: LogLevel = LogLevel.INFO;\n\n/**\n * We allow users the ability to pass their own log handler. We will pass the\n * type of log, the current log level, and any other arguments passed (i.e. the\n * messages that the user wants to log) to this function.\n */\nexport type LogHandler = (\n loggerInstance: Logger,\n logType: LogLevel,\n ...args: unknown[]\n) => void;\n\n/**\n * By default, `console.debug` is not displayed in the developer console (in\n * chrome). To avoid forcing users to have to opt-in to these logs twice\n * (i.e. once for firebase, and once in the console), we are sending `DEBUG`\n * logs to the `console.log` function.\n */\nconst ConsoleMethod = {\n [LogLevel.DEBUG]: 'log',\n [LogLevel.VERBOSE]: 'log',\n [LogLevel.INFO]: 'info',\n [LogLevel.WARN]: 'warn',\n [LogLevel.ERROR]: 'error'\n};\n\n/**\n * The default log handler will forward DEBUG, VERBOSE, INFO, WARN, and ERROR\n * messages on to their corresponding console counterparts (if the log method\n * is supported by the current log level)\n */\nconst defaultLogHandler: LogHandler = (instance, logType, ...args): void => {\n if (logType < instance.logLevel) {\n return;\n }\n const now = new Date().toISOString();\n const method = ConsoleMethod[logType as keyof typeof ConsoleMethod];\n if (method) {\n console[method as 'log' | 'info' | 'warn' | 'error'](\n `[${now}] ${instance.name}:`,\n ...args\n );\n } else {\n throw new Error(\n `Attempted to log a message with an invalid logType (value: ${logType})`\n );\n }\n};\n\nexport class Logger {\n /**\n * Gives you an instance of a Logger to capture messages according to\n * Firebase's logging scheme.\n *\n * @param name The name that the logs will be associated with\n */\n constructor(public name: string) {\n /**\n * Capture the current instance for later use\n */\n instances.push(this);\n }\n\n /**\n * The log level of the given Logger instance.\n */\n private _logLevel = defaultLogLevel;\n\n get logLevel(): LogLevel {\n return this._logLevel;\n }\n\n set logLevel(val: LogLevel) {\n if (!(val in LogLevel)) {\n throw new TypeError(`Invalid value \"${val}\" assigned to \\`logLevel\\``);\n }\n this._logLevel = val;\n }\n\n // Workaround for setter/getter having to be the same type.\n setLogLevel(val: LogLevel | LogLevelString): void {\n this._logLevel = typeof val === 'string' ? levelStringToEnum[val] : val;\n }\n\n /**\n * The main (internal) log handler for the Logger instance.\n * Can be set to a new function in internal package code but not by user.\n */\n private _logHandler: LogHandler = defaultLogHandler;\n get logHandler(): LogHandler {\n return this._logHandler;\n }\n set logHandler(val: LogHandler) {\n if (typeof val !== 'function') {\n throw new TypeError('Value assigned to `logHandler` must be a function');\n }\n this._logHandler = val;\n }\n\n /**\n * The optional, additional, user-defined log handler for the Logger instance.\n */\n private _userLogHandler: LogHandler | null = null;\n get userLogHandler(): LogHandler | null {\n return this._userLogHandler;\n }\n set userLogHandler(val: LogHandler | null) {\n this._userLogHandler = val;\n }\n\n /**\n * The functions below are all based on the `console` interface\n */\n\n debug(...args: unknown[]): void {\n this._userLogHandler && this._userLogHandler(this, LogLevel.DEBUG, ...args);\n this._logHandler(this, LogLevel.DEBUG, ...args);\n }\n log(...args: unknown[]): void {\n this._userLogHandler &&\n this._userLogHandler(this, LogLevel.VERBOSE, ...args);\n this._logHandler(this, LogLevel.VERBOSE, ...args);\n }\n info(...args: unknown[]): void {\n this._userLogHandler && this._userLogHandler(this, LogLevel.INFO, ...args);\n this._logHandler(this, LogLevel.INFO, ...args);\n }\n warn(...args: unknown[]): void {\n this._userLogHandler && this._userLogHandler(this, LogLevel.WARN, ...args);\n this._logHandler(this, LogLevel.WARN, ...args);\n }\n error(...args: unknown[]): void {\n this._userLogHandler && this._userLogHandler(this, LogLevel.ERROR, ...args);\n this._logHandler(this, LogLevel.ERROR, ...args);\n }\n}\n\nexport function setLogLevel(level: LogLevelString | LogLevel): void {\n instances.forEach(inst => {\n inst.setLogLevel(level);\n });\n}\n\nexport function setUserLogHandler(\n logCallback: LogCallback | null,\n options?: LogOptions\n): void {\n for (const instance of instances) {\n let customLogLevel: LogLevel | null = null;\n if (options && options.level) {\n customLogLevel = levelStringToEnum[options.level];\n }\n if (logCallback === null) {\n instance.userLogHandler = null;\n } else {\n instance.userLogHandler = (\n instance: Logger,\n level: LogLevel,\n ...args: unknown[]\n ) => {\n const message = args\n .map(arg => {\n if (arg == null) {\n return null;\n } else if (typeof arg === 'string') {\n return arg;\n } else if (typeof arg === 'number' || typeof arg === 'boolean') {\n return arg.toString();\n } else if (arg instanceof Error) {\n return arg.message;\n } else {\n try {\n return JSON.stringify(arg);\n } catch (ignored) {\n return null;\n }\n }\n })\n .filter(arg => arg)\n .join(' ');\n if (level >= (customLogLevel ?? instance.logLevel)) {\n logCallback({\n level: LogLevel[level].toLowerCase() as LogLevelString,\n message,\n args,\n type: instance.name\n });\n }\n };\n }\n }\n}\n","const instanceOfAny = (object, constructors) => constructors.some((c) => object instanceof c);\n\nlet idbProxyableTypes;\nlet cursorAdvanceMethods;\n// This is a function to prevent it throwing up in node environments.\nfunction getIdbProxyableTypes() {\n return (idbProxyableTypes ||\n (idbProxyableTypes = [\n IDBDatabase,\n IDBObjectStore,\n IDBIndex,\n IDBCursor,\n IDBTransaction,\n ]));\n}\n// This is a function to prevent it throwing up in node environments.\nfunction getCursorAdvanceMethods() {\n return (cursorAdvanceMethods ||\n (cursorAdvanceMethods = [\n IDBCursor.prototype.advance,\n IDBCursor.prototype.continue,\n IDBCursor.prototype.continuePrimaryKey,\n ]));\n}\nconst cursorRequestMap = new WeakMap();\nconst transactionDoneMap = new WeakMap();\nconst transactionStoreNamesMap = new WeakMap();\nconst transformCache = new WeakMap();\nconst reverseTransformCache = new WeakMap();\nfunction promisifyRequest(request) {\n const promise = new Promise((resolve, reject) => {\n const unlisten = () => {\n request.removeEventListener('success', success);\n request.removeEventListener('error', error);\n };\n const success = () => {\n resolve(wrap(request.result));\n unlisten();\n };\n const error = () => {\n reject(request.error);\n unlisten();\n };\n request.addEventListener('success', success);\n request.addEventListener('error', error);\n });\n promise\n .then((value) => {\n // Since cursoring reuses the IDBRequest (*sigh*), we cache it for later retrieval\n // (see wrapFunction).\n if (value instanceof IDBCursor) {\n cursorRequestMap.set(value, request);\n }\n // Catching to avoid \"Uncaught Promise exceptions\"\n })\n .catch(() => { });\n // This mapping exists in reverseTransformCache but doesn't doesn't exist in transformCache. This\n // is because we create many promises from a single IDBRequest.\n reverseTransformCache.set(promise, request);\n return promise;\n}\nfunction cacheDonePromiseForTransaction(tx) {\n // Early bail if we've already created a done promise for this transaction.\n if (transactionDoneMap.has(tx))\n return;\n const done = new Promise((resolve, reject) => {\n const unlisten = () => {\n tx.removeEventListener('complete', complete);\n tx.removeEventListener('error', error);\n tx.removeEventListener('abort', error);\n };\n const complete = () => {\n resolve();\n unlisten();\n };\n const error = () => {\n reject(tx.error || new DOMException('AbortError', 'AbortError'));\n unlisten();\n };\n tx.addEventListener('complete', complete);\n tx.addEventListener('error', error);\n tx.addEventListener('abort', error);\n });\n // Cache it for later retrieval.\n transactionDoneMap.set(tx, done);\n}\nlet idbProxyTraps = {\n get(target, prop, receiver) {\n if (target instanceof IDBTransaction) {\n // Special handling for transaction.done.\n if (prop === 'done')\n return transactionDoneMap.get(target);\n // Polyfill for objectStoreNames because of Edge.\n if (prop === 'objectStoreNames') {\n return target.objectStoreNames || transactionStoreNamesMap.get(target);\n }\n // Make tx.store return the only store in the transaction, or undefined if there are many.\n if (prop === 'store') {\n return receiver.objectStoreNames[1]\n ? undefined\n : receiver.objectStore(receiver.objectStoreNames[0]);\n }\n }\n // Else transform whatever we get back.\n return wrap(target[prop]);\n },\n set(target, prop, value) {\n target[prop] = value;\n return true;\n },\n has(target, prop) {\n if (target instanceof IDBTransaction &&\n (prop === 'done' || prop === 'store')) {\n return true;\n }\n return prop in target;\n },\n};\nfunction replaceTraps(callback) {\n idbProxyTraps = callback(idbProxyTraps);\n}\nfunction wrapFunction(func) {\n // Due to expected object equality (which is enforced by the caching in `wrap`), we\n // only create one new func per func.\n // Edge doesn't support objectStoreNames (booo), so we polyfill it here.\n if (func === IDBDatabase.prototype.transaction &&\n !('objectStoreNames' in IDBTransaction.prototype)) {\n return function (storeNames, ...args) {\n const tx = func.call(unwrap(this), storeNames, ...args);\n transactionStoreNamesMap.set(tx, storeNames.sort ? storeNames.sort() : [storeNames]);\n return wrap(tx);\n };\n }\n // Cursor methods are special, as the behaviour is a little more different to standard IDB. In\n // IDB, you advance the cursor and wait for a new 'success' on the IDBRequest that gave you the\n // cursor. It's kinda like a promise that can resolve with many values. That doesn't make sense\n // with real promises, so each advance methods returns a new promise for the cursor object, or\n // undefined if the end of the cursor has been reached.\n if (getCursorAdvanceMethods().includes(func)) {\n return function (...args) {\n // Calling the original function with the proxy as 'this' causes ILLEGAL INVOCATION, so we use\n // the original object.\n func.apply(unwrap(this), args);\n return wrap(cursorRequestMap.get(this));\n };\n }\n return function (...args) {\n // Calling the original function with the proxy as 'this' causes ILLEGAL INVOCATION, so we use\n // the original object.\n return wrap(func.apply(unwrap(this), args));\n };\n}\nfunction transformCachableValue(value) {\n if (typeof value === 'function')\n return wrapFunction(value);\n // This doesn't return, it just creates a 'done' promise for the transaction,\n // which is later returned for transaction.done (see idbObjectHandler).\n if (value instanceof IDBTransaction)\n cacheDonePromiseForTransaction(value);\n if (instanceOfAny(value, getIdbProxyableTypes()))\n return new Proxy(value, idbProxyTraps);\n // Return the same value back if we're not going to transform it.\n return value;\n}\nfunction wrap(value) {\n // We sometimes generate multiple promises from a single IDBRequest (eg when cursoring), because\n // IDB is weird and a single IDBRequest can yield many responses, so these can't be cached.\n if (value instanceof IDBRequest)\n return promisifyRequest(value);\n // If we've already transformed this value before, reuse the transformed value.\n // This is faster, but it also provides object equality.\n if (transformCache.has(value))\n return transformCache.get(value);\n const newValue = transformCachableValue(value);\n // Not all types are transformed.\n // These may be primitive types, so they can't be WeakMap keys.\n if (newValue !== value) {\n transformCache.set(value, newValue);\n reverseTransformCache.set(newValue, value);\n }\n return newValue;\n}\nconst unwrap = (value) => reverseTransformCache.get(value);\n\nexport { reverseTransformCache as a, instanceOfAny as i, replaceTraps as r, unwrap as u, wrap as w };\n","import { w as wrap, r as replaceTraps } from './wrap-idb-value.js';\nexport { u as unwrap, w as wrap } from './wrap-idb-value.js';\n\n/**\n * Open a database.\n *\n * @param name Name of the database.\n * @param version Schema version.\n * @param callbacks Additional callbacks.\n */\nfunction openDB(name, version, { blocked, upgrade, blocking, terminated } = {}) {\n const request = indexedDB.open(name, version);\n const openPromise = wrap(request);\n if (upgrade) {\n request.addEventListener('upgradeneeded', (event) => {\n upgrade(wrap(request.result), event.oldVersion, event.newVersion, wrap(request.transaction), event);\n });\n }\n if (blocked) {\n request.addEventListener('blocked', (event) => blocked(\n // Casting due to https://github.com/microsoft/TypeScript-DOM-lib-generator/pull/1405\n event.oldVersion, event.newVersion, event));\n }\n openPromise\n .then((db) => {\n if (terminated)\n db.addEventListener('close', () => terminated());\n if (blocking) {\n db.addEventListener('versionchange', (event) => blocking(event.oldVersion, event.newVersion, event));\n }\n })\n .catch(() => { });\n return openPromise;\n}\n/**\n * Delete a database.\n *\n * @param name Name of the database.\n */\nfunction deleteDB(name, { blocked } = {}) {\n const request = indexedDB.deleteDatabase(name);\n if (blocked) {\n request.addEventListener('blocked', (event) => blocked(\n // Casting due to https://github.com/microsoft/TypeScript-DOM-lib-generator/pull/1405\n event.oldVersion, event));\n }\n return wrap(request).then(() => undefined);\n}\n\nconst readMethods = ['get', 'getKey', 'getAll', 'getAllKeys', 'count'];\nconst writeMethods = ['put', 'add', 'delete', 'clear'];\nconst cachedMethods = new Map();\nfunction getMethod(target, prop) {\n if (!(target instanceof IDBDatabase &&\n !(prop in target) &&\n typeof prop === 'string')) {\n return;\n }\n if (cachedMethods.get(prop))\n return cachedMethods.get(prop);\n const targetFuncName = prop.replace(/FromIndex$/, '');\n const useIndex = prop !== targetFuncName;\n const isWrite = writeMethods.includes(targetFuncName);\n if (\n // Bail if the target doesn't exist on the target. Eg, getAll isn't in Edge.\n !(targetFuncName in (useIndex ? IDBIndex : IDBObjectStore).prototype) ||\n !(isWrite || readMethods.includes(targetFuncName))) {\n return;\n }\n const method = async function (storeName, ...args) {\n // isWrite ? 'readwrite' : undefined gzipps better, but fails in Edge :(\n const tx = this.transaction(storeName, isWrite ? 'readwrite' : 'readonly');\n let target = tx.store;\n if (useIndex)\n target = target.index(args.shift());\n // Must reject if op rejects.\n // If it's a write operation, must reject if tx.done rejects.\n // Must reject with op rejection first.\n // Must resolve with op value.\n // Must handle both promises (no unhandled rejections)\n return (await Promise.all([\n target[targetFuncName](...args),\n isWrite && tx.done,\n ]))[0];\n };\n cachedMethods.set(prop, method);\n return method;\n}\nreplaceTraps((oldTraps) => ({\n ...oldTraps,\n get: (target, prop, receiver) => getMethod(target, prop) || oldTraps.get(target, prop, receiver),\n has: (target, prop) => !!getMethod(target, prop) || oldTraps.has(target, prop),\n}));\n\nexport { deleteDB, openDB };\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { version } from '../../package.json';\n\nexport const PENDING_TIMEOUT_MS = 10000;\n\nexport const PACKAGE_VERSION = `w:${version}`;\nexport const INTERNAL_AUTH_VERSION = 'FIS_v2';\n\nexport const INSTALLATIONS_API_URL =\n 'https://firebaseinstallations.googleapis.com/v1';\n\nexport const TOKEN_EXPIRATION_BUFFER = 60 * 60 * 1000; // One hour\n\nexport const SERVICE = 'installations';\nexport const SERVICE_NAME = 'Installations';\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { ErrorFactory, FirebaseError } from '@firebase/util';\nimport { SERVICE, SERVICE_NAME } from './constants';\n\nexport const enum ErrorCode {\n MISSING_APP_CONFIG_VALUES = 'missing-app-config-values',\n NOT_REGISTERED = 'not-registered',\n INSTALLATION_NOT_FOUND = 'installation-not-found',\n REQUEST_FAILED = 'request-failed',\n APP_OFFLINE = 'app-offline',\n DELETE_PENDING_REGISTRATION = 'delete-pending-registration'\n}\n\nconst ERROR_DESCRIPTION_MAP: { readonly [key in ErrorCode]: string } = {\n [ErrorCode.MISSING_APP_CONFIG_VALUES]:\n 'Missing App configuration value: \"{$valueName}\"',\n [ErrorCode.NOT_REGISTERED]: 'Firebase Installation is not registered.',\n [ErrorCode.INSTALLATION_NOT_FOUND]: 'Firebase Installation not found.',\n [ErrorCode.REQUEST_FAILED]:\n '{$requestName} request failed with error \"{$serverCode} {$serverStatus}: {$serverMessage}\"',\n [ErrorCode.APP_OFFLINE]: 'Could not process request. Application offline.',\n [ErrorCode.DELETE_PENDING_REGISTRATION]:\n \"Can't delete installation while there is a pending registration request.\"\n};\n\ninterface ErrorParams {\n [ErrorCode.MISSING_APP_CONFIG_VALUES]: {\n valueName: string;\n };\n [ErrorCode.REQUEST_FAILED]: {\n requestName: string;\n [index: string]: string | number; // to make TypeScript 3.8 happy\n } & ServerErrorData;\n}\n\nexport const ERROR_FACTORY = new ErrorFactory<ErrorCode, ErrorParams>(\n SERVICE,\n SERVICE_NAME,\n ERROR_DESCRIPTION_MAP\n);\n\nexport interface ServerErrorData {\n serverCode: number;\n serverMessage: string;\n serverStatus: string;\n}\n\nexport type ServerError = FirebaseError & { customData: ServerErrorData };\n\n/** Returns true if error is a FirebaseError that is based on an error from the server. */\nexport function isServerError(error: unknown): error is ServerError {\n return (\n error instanceof FirebaseError &&\n error.code.includes(ErrorCode.REQUEST_FAILED)\n );\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseError } from '@firebase/util';\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport {\n CompletedAuthToken,\n RegisteredInstallationEntry,\n RequestStatus\n} from '../interfaces/installation-entry';\nimport {\n INSTALLATIONS_API_URL,\n INTERNAL_AUTH_VERSION\n} from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\nimport { AppConfig } from '../interfaces/installation-impl';\n\nexport function getInstallationsEndpoint({ projectId }: AppConfig): string {\n return `${INSTALLATIONS_API_URL}/projects/${projectId}/installations`;\n}\n\nexport function extractAuthTokenInfoFromResponse(\n response: GenerateAuthTokenResponse\n): CompletedAuthToken {\n return {\n token: response.token,\n requestStatus: RequestStatus.COMPLETED,\n expiresIn: getExpiresInFromResponseExpiresIn(response.expiresIn),\n creationTime: Date.now()\n };\n}\n\nexport async function getErrorFromResponse(\n requestName: string,\n response: Response\n): Promise<FirebaseError> {\n const responseJson: ErrorResponse = await response.json();\n const errorData = responseJson.error;\n return ERROR_FACTORY.create(ErrorCode.REQUEST_FAILED, {\n requestName,\n serverCode: errorData.code,\n serverMessage: errorData.message,\n serverStatus: errorData.status\n });\n}\n\nexport function getHeaders({ apiKey }: AppConfig): Headers {\n return new Headers({\n 'Content-Type': 'application/json',\n Accept: 'application/json',\n 'x-goog-api-key': apiKey\n });\n}\n\nexport function getHeadersWithAuth(\n appConfig: AppConfig,\n { refreshToken }: RegisteredInstallationEntry\n): Headers {\n const headers = getHeaders(appConfig);\n headers.append('Authorization', getAuthorizationHeader(refreshToken));\n return headers;\n}\n\nexport interface ErrorResponse {\n error: {\n code: number;\n message: string;\n status: string;\n };\n}\n\n/**\n * Calls the passed in fetch wrapper and returns the response.\n * If the returned response has a status of 5xx, re-runs the function once and\n * returns the response.\n */\nexport async function retryIfServerError(\n fn: () => Promise<Response>\n): Promise<Response> {\n const result = await fn();\n\n if (result.status >= 500 && result.status < 600) {\n // Internal Server Error. Retry request.\n return fn();\n }\n\n return result;\n}\n\nfunction getExpiresInFromResponseExpiresIn(responseExpiresIn: string): number {\n // This works because the server will never respond with fractions of a second.\n return Number(responseExpiresIn.replace('s', '000'));\n}\n\nfunction getAuthorizationHeader(refreshToken: string): string {\n return `${INTERNAL_AUTH_VERSION} ${refreshToken}`;\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/** Returns a promise that resolves after given time passes. */\nexport function sleep(ms: number): Promise<void> {\n return new Promise<void>(resolve => {\n setTimeout(resolve, ms);\n });\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { bufferToBase64UrlSafe } from './buffer-to-base64-url-safe';\n\nexport const VALID_FID_PATTERN = /^[cdef][\\w-]{21}$/;\nexport const INVALID_FID = '';\n\n/**\n * Generates a new FID using random values from Web Crypto API.\n * Returns an empty string if FID generation fails for any reason.\n */\nexport function generateFid(): string {\n try {\n // A valid FID has exactly 22 base64 characters, which is 132 bits, or 16.5\n // bytes. our implementation generates a 17 byte array instead.\n const fidByteArray = new Uint8Array(17);\n const crypto =\n self.crypto || (self as unknown as { msCrypto: Crypto }).msCrypto;\n crypto.getRandomValues(fidByteArray);\n\n // Replace the first 4 random bits with the constant FID header of 0b0111.\n fidByteArray[0] = 0b01110000 + (fidByteArray[0] % 0b00010000);\n\n const fid = encode(fidByteArray);\n\n return VALID_FID_PATTERN.test(fid) ? fid : INVALID_FID;\n } catch {\n // FID generation errored\n return INVALID_FID;\n }\n}\n\n/** Converts a FID Uint8Array to a base64 string representation. */\nfunction encode(fidByteArray: Uint8Array): string {\n const b64String = bufferToBase64UrlSafe(fidByteArray);\n\n // Remove the 23rd character that was added because of the extra 4 bits at the\n // end of our 17 byte array, and the '=' padding.\n return b64String.substr(0, 22);\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport function bufferToBase64UrlSafe(array: Uint8Array): string {\n const b64 = btoa(String.fromCharCode(...array));\n return b64.replace(/\\+/g, '-').replace(/\\//g, '_');\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { AppConfig } from '../interfaces/installation-impl';\n\n/** Returns a string key that can be used to identify the app. */\nexport function getKey(appConfig: AppConfig): string {\n return `${appConfig.appName}!${appConfig.appId}`;\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { getKey } from '../util/get-key';\nimport { AppConfig } from '../interfaces/installation-impl';\nimport { IdChangeCallbackFn } from '../api';\n\nconst fidChangeCallbacks: Map<string, Set<IdChangeCallbackFn>> = new Map();\n\n/**\n * Calls the onIdChange callbacks with the new FID value, and broadcasts the\n * change to other tabs.\n */\nexport function fidChanged(appConfig: AppConfig, fid: string): void {\n const key = getKey(appConfig);\n\n callFidChangeCallbacks(key, fid);\n broadcastFidChange(key, fid);\n}\n\nexport function addCallback(\n appConfig: AppConfig,\n callback: IdChangeCallbackFn\n): void {\n // Open the broadcast channel if it's not already open,\n // to be able to listen to change events from other tabs.\n getBroadcastChannel();\n\n const key = getKey(appConfig);\n\n let callbackSet = fidChangeCallbacks.get(key);\n if (!callbackSet) {\n callbackSet = new Set();\n fidChangeCallbacks.set(key, callbackSet);\n }\n callbackSet.add(callback);\n}\n\nexport function removeCallback(\n appConfig: AppConfig,\n callback: IdChangeCallbackFn\n): void {\n const key = getKey(appConfig);\n\n const callbackSet = fidChangeCallbacks.get(key);\n\n if (!callbackSet) {\n return;\n }\n\n callbackSet.delete(callback);\n if (callbackSet.size === 0) {\n fidChangeCallbacks.delete(key);\n }\n\n // Close broadcast channel if there are no more callbacks.\n closeBroadcastChannel();\n}\n\nfunction callFidChangeCallbacks(key: string, fid: string): void {\n const callbacks = fidChangeCallbacks.get(key);\n if (!callbacks) {\n return;\n }\n\n for (const callback of callbacks) {\n callback(fid);\n }\n}\n\nfunction broadcastFidChange(key: string, fid: string): void {\n const channel = getBroadcastChannel();\n if (channel) {\n channel.postMessage({ key, fid });\n }\n closeBroadcastChannel();\n}\n\nlet broadcastChannel: BroadcastChannel | null = null;\n/** Opens and returns a BroadcastChannel if it is supported by the browser. */\nfunction getBroadcastChannel(): BroadcastChannel | null {\n if (!broadcastChannel && 'BroadcastChannel' in self) {\n broadcastChannel = new BroadcastChannel('[Firebase] FID Change');\n broadcastChannel.onmessage = e => {\n callFidChangeCallbacks(e.data.key, e.data.fid);\n };\n }\n return broadcastChannel;\n}\n\nfunction closeBroadcastChannel(): void {\n if (fidChangeCallbacks.size === 0 && broadcastChannel) {\n broadcastChannel.close();\n broadcastChannel = null;\n }\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { DBSchema, IDBPDatabase, openDB } from 'idb';\nimport { AppConfig } from '../interfaces/installation-impl';\nimport { InstallationEntry } from '../interfaces/installation-entry';\nimport { getKey } from '../util/get-key';\nimport { fidChanged } from './fid-changed';\n\nconst DATABASE_NAME = 'firebase-installations-database';\nconst DATABASE_VERSION = 1;\nconst OBJECT_STORE_NAME = 'firebase-installations-store';\n\ninterface InstallationsDB extends DBSchema {\n 'firebase-installations-store': {\n key: string;\n value: InstallationEntry | undefined;\n };\n}\n\nlet dbPromise: Promise<IDBPDatabase<InstallationsDB>> | null = null;\nfunction getDbPromise(): Promise<IDBPDatabase<InstallationsDB>> {\n if (!dbPromise) {\n dbPromise = openDB(DATABASE_NAME, DATABASE_VERSION, {\n upgrade: (db, oldVersion) => {\n // We don't use 'break' in this switch statement, the fall-through\n // behavior is what we want, because if there are multiple versions between\n // the old version and the current version, we want ALL the migrations\n // that correspond to those versions to run, not only the last one.\n // eslint-disable-next-line default-case\n switch (oldVersion) {\n case 0:\n db.createObjectStore(OBJECT_STORE_NAME);\n }\n }\n });\n }\n return dbPromise;\n}\n\n/** Gets record(s) from the objectStore that match the given key. */\nexport async function get(\n appConfig: AppConfig\n): Promise<InstallationEntry | undefined> {\n const key = getKey(appConfig);\n const db = await getDbPromise();\n return db\n .transaction(OBJECT_STORE_NAME)\n .objectStore(OBJECT_STORE_NAME)\n .get(key) as Promise<InstallationEntry>;\n}\n\n/** Assigns or overwrites the record for the given key with the given value. */\nexport async function set<ValueType extends InstallationEntry>(\n appConfig: AppConfig,\n value: ValueType\n): Promise<ValueType> {\n const key = getKey(appConfig);\n const db = await getDbPromise();\n const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n const objectStore = tx.objectStore(OBJECT_STORE_NAME);\n const oldValue = (await objectStore.get(key)) as InstallationEntry;\n await objectStore.put(value, key);\n await tx.done;\n\n if (!oldValue || oldValue.fid !== value.fid) {\n fidChanged(appConfig, value.fid);\n }\n\n return value;\n}\n\n/** Removes record(s) from the objectStore that match the given key. */\nexport async function remove(appConfig: AppConfig): Promise<void> {\n const key = getKey(appConfig);\n const db = await getDbPromise();\n const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n await tx.objectStore(OBJECT_STORE_NAME).delete(key);\n await tx.done;\n}\n\n/**\n * Atomically updates a record with the result of updateFn, which gets\n * called with the current value. If newValue is undefined, the record is\n * deleted instead.\n * @return Updated value\n */\nexport async function update<ValueType extends InstallationEntry | undefined>(\n appConfig: AppConfig,\n updateFn: (previousValue: InstallationEntry | undefined) => ValueType\n): Promise<ValueType> {\n const key = getKey(appConfig);\n const db = await getDbPromise();\n const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n const store = tx.objectStore(OBJECT_STORE_NAME);\n const oldValue: InstallationEntry | undefined = (await store.get(\n key\n )) as InstallationEntry;\n const newValue = updateFn(oldValue);\n\n if (newValue === undefined) {\n await store.delete(key);\n } else {\n await store.put(newValue, key);\n }\n await tx.done;\n\n if (newValue && (!oldValue || oldValue.fid !== newValue.fid)) {\n fidChanged(appConfig, newValue.fid);\n }\n\n return newValue;\n}\n\nexport async function clear(): Promise<void> {\n const db = await getDbPromise();\n const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n await tx.objectStore(OBJECT_STORE_NAME).clear();\n await tx.done;\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { createInstallationRequest } from '../functions/create-installation-request';\nimport {\n AppConfig,\n FirebaseInstallationsImpl\n} from '../interfaces/installation-impl';\nimport {\n InProgressInstallationEntry,\n InstallationEntry,\n RegisteredInstallationEntry,\n RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\nimport { generateFid, INVALID_FID } from './generate-fid';\nimport { remove, set, update } from './idb-manager';\n\nexport interface InstallationEntryWithRegistrationPromise {\n installationEntry: InstallationEntry;\n /** Exist iff the installationEntry is not registered. */\n registrationPromise?: Promise<RegisteredInstallationEntry>;\n}\n\n/**\n * Updates and returns the InstallationEntry from the database.\n * Also triggers a registration request if it is necessary and possible.\n */\nexport async function getInstallationEntry(\n installations: FirebaseInstallationsImpl\n): Promise<InstallationEntryWithRegistrationPromise> {\n let registrationPromise: Promise<RegisteredInstallationEntry> | undefined;\n\n const installationEntry = await update(installations.appConfig, oldEntry => {\n const installationEntry = updateOrCreateInstallationEntry(oldEntry);\n const entryWithPromise = triggerRegistrationIfNecessary(\n installations,\n installationEntry\n );\n registrationPromise = entryWithPromise.registrationPromise;\n return entryWithPromise.installationEntry;\n });\n\n if (installationEntry.fid === INVALID_FID) {\n // FID generation failed. Waiting for the FID from the server.\n return { installationEntry: await registrationPromise! };\n }\n\n return {\n installationEntry,\n registrationPromise\n };\n}\n\n/**\n * Creates a new Installation Entry if one does not exist.\n * Also clears timed out pending requests.\n */\nfunction updateOrCreateInstallationEntry(\n oldEntry: InstallationEntry | undefined\n): InstallationEntry {\n const entry: InstallationEntry = oldEntry || {\n fid: generateFid(),\n registrationStatus: RequestStatus.NOT_STARTED\n };\n\n return clearTimedOutRequest(entry);\n}\n\n/**\n * If the Firebase Installation is not registered yet, this will trigger the\n * registration and return an InProgressInstallationEntry.\n *\n * If registrationPromise does not exist, the installationEntry is guaranteed\n * to be registered.\n */\nfunction triggerRegistrationIfNecessary(\n installations: FirebaseInstallationsImpl,\n installationEntry: InstallationEntry\n): InstallationEntryWithRegistrationPromise {\n if (installationEntry.registrationStatus === RequestStatus.NOT_STARTED) {\n if (!navigator.onLine) {\n // Registration required but app is offline.\n const registrationPromiseWithError = Promise.reject(\n ERROR_FACTORY.create(ErrorCode.APP_OFFLINE)\n );\n return {\n installationEntry,\n registrationPromise: registrationPromiseWithError\n };\n }\n\n // Try registering. Change status to IN_PROGRESS.\n const inProgressEntry: InProgressInstallationEntry = {\n fid: installationEntry.fid,\n registrationStatus: RequestStatus.IN_PROGRESS,\n registrationTime: Date.now()\n };\n const registrationPromise = registerInstallation(\n installations,\n inProgressEntry\n );\n return { installationEntry: inProgressEntry, registrationPromise };\n } else if (\n installationEntry.registrationStatus === RequestStatus.IN_PROGRESS\n ) {\n return {\n installationEntry,\n registrationPromise: waitUntilFidRegistration(installations)\n };\n } else {\n return { installationEntry };\n }\n}\n\n/** This will be executed only once for each new Firebase Installation. */\nasync function registerInstallation(\n installations: FirebaseInstallationsImpl,\n installationEntry: InProgressInstallationEntry\n): Promise<RegisteredInstallationEntry> {\n try {\n const registeredInstallationEntry = await createInstallationRequest(\n installations,\n installationEntry\n );\n return set(installations.appConfig, registeredInstallationEntry);\n } catch (e) {\n if (isServerError(e) && e.customData.serverCode === 409) {\n // Server returned a \"FID cannot be used\" error.\n // Generate a new ID next time.\n await remove(installations.appConfig);\n } else {\n // Registration failed. Set FID as not registered.\n await set(installations.appConfig, {\n fid: installationEntry.fid,\n registrationStatus: RequestStatus.NOT_STARTED\n });\n }\n throw e;\n }\n}\n\n/** Call if FID registration is pending in another request. */\nasync function waitUntilFidRegistration(\n installations: FirebaseInstallationsImpl\n): Promise<RegisteredInstallationEntry> {\n // Unfortunately, there is no way of reliably observing when a value in\n // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n // so we need to poll.\n\n let entry: InstallationEntry = await updateInstallationRequest(\n installations.appConfig\n );\n while (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n // createInstallation request still in progress.\n await sleep(100);\n\n entry = await updateInstallationRequest(installations.appConfig);\n }\n\n if (entry.registrationStatus === RequestStatus.NOT_STARTED) {\n // The request timed out or failed in a different call. Try again.\n const { installationEntry, registrationPromise } =\n await getInstallationEntry(installations);\n\n if (registrationPromise) {\n return registrationPromise;\n } else {\n // if there is no registrationPromise, entry is registered.\n return installationEntry as RegisteredInstallationEntry;\n }\n }\n\n return entry;\n}\n\n/**\n * Called only if there is a CreateInstallation request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * CreateInstallation request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateInstallationRequest(\n appConfig: AppConfig\n): Promise<InstallationEntry> {\n return update(appConfig, oldEntry => {\n if (!oldEntry) {\n throw ERROR_FACTORY.create(ErrorCode.INSTALLATION_NOT_FOUND);\n }\n return clearTimedOutRequest(oldEntry);\n });\n}\n\nfunction clearTimedOutRequest(entry: InstallationEntry): InstallationEntry {\n if (hasInstallationRequestTimedOut(entry)) {\n return {\n fid: entry.fid,\n registrationStatus: RequestStatus.NOT_STARTED\n };\n }\n\n return entry;\n}\n\nfunction hasInstallationRequestTimedOut(\n installationEntry: InstallationEntry\n): boolean {\n return (\n installationEntry.registrationStatus === RequestStatus.IN_PROGRESS &&\n installationEntry.registrationTime + PENDING_TIMEOUT_MS < Date.now()\n );\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { CreateInstallationResponse } from '../interfaces/api-response';\nimport {\n InProgressInstallationEntry,\n RegisteredInstallationEntry,\n RequestStatus\n} from '../interfaces/installation-entry';\nimport { INTERNAL_AUTH_VERSION, PACKAGE_VERSION } from '../util/constants';\nimport {\n extractAuthTokenInfoFromResponse,\n getErrorFromResponse,\n getHeaders,\n getInstallationsEndpoint,\n retryIfServerError\n} from './common';\nimport { FirebaseInstallationsImpl } from '../interfaces/installation-impl';\n\nexport async function createInstallationRequest(\n { appConfig, heartbeatServiceProvider }: FirebaseInstallationsImpl,\n { fid }: InProgressInstallationEntry\n): Promise<RegisteredInstallationEntry> {\n const endpoint = getInstallationsEndpoint(appConfig);\n\n const headers = getHeaders(appConfig);\n\n // If heartbeat service exists, add the heartbeat string to the header.\n const heartbeatService = heartbeatServiceProvider.getImmediate({\n optional: true\n });\n if (heartbeatService) {\n const heartbeatsHeader = await heartbeatService.getHeartbeatsHeader();\n if (heartbeatsHeader) {\n headers.append('x-firebase-client', heartbeatsHeader);\n }\n }\n\n const body = {\n fid,\n authVersion: INTERNAL_AUTH_VERSION,\n appId: appConfig.appId,\n sdkVersion: PACKAGE_VERSION\n };\n\n const request: RequestInit = {\n method: 'POST',\n headers,\n body: JSON.stringify(body)\n };\n\n const response = await retryIfServerError(() => fetch(endpoint, request));\n if (response.ok) {\n const responseValue: CreateInstallationResponse = await response.json();\n const registeredInstallationEntry: RegisteredInstallationEntry = {\n fid: responseValue.fid || fid,\n registrationStatus: RequestStatus.COMPLETED,\n refreshToken: responseValue.refreshToken,\n authToken: extractAuthTokenInfoFromResponse(responseValue.authToken)\n };\n return registeredInstallationEntry;\n } else {\n throw await getErrorFromResponse('Create Installation', response);\n }\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport {\n CompletedAuthToken,\n RegisteredInstallationEntry\n} from '../interfaces/installation-entry';\nimport { PACKAGE_VERSION } from '../util/constants';\nimport {\n extractAuthTokenInfoFromResponse,\n getErrorFromResponse,\n getHeadersWithAuth,\n getInstallationsEndpoint,\n retryIfServerError\n} from './common';\nimport {\n FirebaseInstallationsImpl,\n AppConfig\n} from '../interfaces/installation-impl';\n\nexport async function generateAuthTokenRequest(\n { appConfig, heartbeatServiceProvider }: FirebaseInstallationsImpl,\n installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n const endpoint = getGenerateAuthTokenEndpoint(appConfig, installationEntry);\n\n const headers = getHeadersWithAuth(appConfig, installationEntry);\n\n // If heartbeat service exists, add the heartbeat string to the header.\n const heartbeatService = heartbeatServiceProvider.getImmediate({\n optional: true\n });\n if (heartbeatService) {\n const heartbeatsHeader = await heartbeatService.getHeartbeatsHeader();\n if (heartbeatsHeader) {\n headers.append('x-firebase-client', heartbeatsHeader);\n }\n }\n\n const body = {\n installation: {\n sdkVersion: PACKAGE_VERSION,\n appId: appConfig.appId\n }\n };\n\n const request: RequestInit = {\n method: 'POST',\n headers,\n body: JSON.stringify(body)\n };\n\n const response = await retryIfServerError(() => fetch(endpoint, request));\n if (response.ok) {\n const responseValue: GenerateAuthTokenResponse = await response.json();\n const completedAuthToken: CompletedAuthToken =\n extractAuthTokenInfoFromResponse(responseValue);\n return completedAuthToken;\n } else {\n throw await getErrorFromResponse('Generate Auth Token', response);\n }\n}\n\nfunction getGenerateAuthTokenEndpoint(\n appConfig: AppConfig,\n { fid }: RegisteredInstallationEntry\n): string {\n return `${getInstallationsEndpoint(appConfig)}/${fid}/authTokens:generate`;\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { generateAuthTokenRequest } from '../functions/generate-auth-token-request';\nimport {\n AppConfig,\n FirebaseInstallationsImpl\n} from '../interfaces/installation-impl';\nimport {\n AuthToken,\n CompletedAuthToken,\n InProgressAuthToken,\n InstallationEntry,\n RegisteredInstallationEntry,\n RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS, TOKEN_EXPIRATION_BUFFER } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\nimport { remove, set, update } from './idb-manager';\n\n/**\n * Returns a valid authentication token for the installation. Generates a new\n * token if one doesn't exist, is expired or about to expire.\n *\n * Should only be called if the Firebase Installation is registered.\n */\nexport async function refreshAuthToken(\n installations: FirebaseInstallationsImpl,\n forceRefresh = false\n): Promise<CompletedAuthToken> {\n let tokenPromise: Promise<CompletedAuthToken> | undefined;\n const entry = await update(installations.appConfig, oldEntry => {\n if (!isEntryRegistered(oldEntry)) {\n throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n }\n\n const oldAuthToken = oldEntry.authToken;\n if (!forceRefresh && isAuthTokenValid(oldAuthToken)) {\n // There is a valid token in the DB.\n return oldEntry;\n } else if (oldAuthToken.requestStatus === RequestStatus.IN_PROGRESS) {\n // There already is a token request in progress.\n tokenPromise = waitUntilAuthTokenRequest(installations, forceRefresh);\n return oldEntry;\n } else {\n // No token or token expired.\n if (!navigator.onLine) {\n throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n }\n\n const inProgressEntry = makeAuthTokenRequestInProgressEntry(oldEntry);\n tokenPromise = fetchAuthTokenFromServer(installations, inProgressEntry);\n return inProgressEntry;\n }\n });\n\n const authToken = tokenPromise\n ? await tokenPromise\n : (entry.authToken as CompletedAuthToken);\n return authToken;\n}\n\n/**\n * Call only if FID is registered and Auth Token request is in progress.\n *\n * Waits until the current pending request finishes. If the request times out,\n * tries once in this thread as well.\n */\nasync function waitUntilAuthTokenRequest(\n installations: FirebaseInstallationsImpl,\n forceRefresh: boolean\n): Promise<CompletedAuthToken> {\n // Unfortunately, there is no way of reliably observing when a value in\n // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n // so we need to poll.\n\n let entry = await updateAuthTokenRequest(installations.appConfig);\n while (entry.authToken.requestStatus === RequestStatus.IN_PROGRESS) {\n // generateAuthToken still in progress.\n await sleep(100);\n\n entry = await updateAuthTokenRequest(installations.appConfig);\n }\n\n const authToken = entry.authToken;\n if (authToken.requestStatus === RequestStatus.NOT_STARTED) {\n // The request timed out or failed in a different call. Try again.\n return refreshAuthToken(installations, forceRefresh);\n } else {\n return authToken;\n }\n}\n\n/**\n * Called only if there is a GenerateAuthToken request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * GenerateAuthToken request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateAuthTokenRequest(\n appConfig: AppConfig\n): Promise<RegisteredInstallationEntry> {\n return update(appConfig, oldEntry => {\n if (!isEntryRegistered(oldEntry)) {\n throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n }\n\n const oldAuthToken = oldEntry.authToken;\n if (hasAuthTokenRequestTimedOut(oldAuthToken)) {\n return {\n ...oldEntry,\n authToken: { requestStatus: RequestStatus.NOT_STARTED }\n };\n }\n\n return oldEntry;\n });\n}\n\nasync function fetchAuthTokenFromServer(\n installations: FirebaseInstallationsImpl,\n installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n try {\n const authToken = await generateAuthTokenRequest(\n installations,\n installationEntry\n );\n const updatedInstallationEntry: RegisteredInstallationEntry = {\n ...installationEntry,\n authToken\n };\n await set(installations.appConfig, updatedInstallationEntry);\n return authToken;\n } catch (e) {\n if (\n isServerError(e) &&\n (e.customData.serverCode === 401 || e.customData.serverCode === 404)\n ) {\n // Server returned a \"FID not found\" or a \"Invalid authentication\" error.\n // Generate a new ID next time.\n await remove(installations.appConfig);\n } else {\n const updatedInstallationEntry: RegisteredInstallationEntry = {\n ...installationEntry,\n authToken: { requestStatus: RequestStatus.NOT_STARTED }\n };\n await set(installations.appConfig, updatedInstallationEntry);\n }\n throw e;\n }\n}\n\nfunction isEntryRegistered(\n installationEntry: InstallationEntry | undefined\n): installationEntry is RegisteredInstallationEntry {\n return (\n installationEntry !== undefined &&\n installationEntry.registrationStatus === RequestStatus.COMPLETED\n );\n}\n\nfunction isAuthTokenValid(authToken: AuthToken): boolean {\n return (\n authToken.requestStatus === RequestStatus.COMPLETED &&\n !isAuthTokenExpired(authToken)\n );\n}\n\nfunction isAuthTokenExpired(authToken: CompletedAuthToken): boolean {\n const now = Date.now();\n return (\n now < authToken.creationTime ||\n authToken.creationTime + authToken.expiresIn < now + TOKEN_EXPIRATION_BUFFER\n );\n}\n\n/** Returns an updated InstallationEntry with an InProgressAuthToken. */\nfunction makeAuthTokenRequestInProgressEntry(\n oldEntry: RegisteredInstallationEntry\n): RegisteredInstallationEntry {\n const inProgressAuthToken: InProgressAuthToken = {\n requestStatus: RequestStatus.IN_PROGRESS,\n requestTime: Date.now()\n };\n return {\n ...oldEntry,\n authToken: inProgressAuthToken\n };\n}\n\nfunction hasAuthTokenRequestTimedOut(authToken: AuthToken): boolean {\n return (\n authToken.requestStatus === RequestStatus.IN_PROGRESS &&\n authToken.requestTime + PENDING_TIMEOUT_MS < Date.now()\n );\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\nimport { refreshAuthToken } from '../helpers/refresh-auth-token';\nimport { FirebaseInstallationsImpl } from '../interfaces/installation-impl';\nimport { Installations } from '../interfaces/public-types';\n\n/**\n * Returns a Firebase Installations auth token, identifying the current\n * Firebase Installation.\n * @param installations - The `Installations` instance.\n * @param forceRefresh - Force refresh regardless of token expiration.\n *\n * @public\n */\nexport async function getToken(\n installations: Installations,\n forceRefresh = false\n): Promise<string> {\n const installationsImpl = installations as FirebaseInstallationsImpl;\n await completeInstallationRegistration(installationsImpl);\n\n // At this point we either have a Registered Installation in the DB, or we've\n // already thrown an error.\n const authToken = await refreshAuthToken(installationsImpl, forceRefresh);\n return authToken.token;\n}\n\nasync function completeInstallationRegistration(\n installations: FirebaseInstallationsImpl\n): Promise<void> {\n const { registrationPromise } = await getInstallationEntry(installations);\n\n if (registrationPromise) {\n // A createInstallation request is in progress. Wait until it finishes.\n await registrationPromise;\n }\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp, FirebaseOptions } from '@firebase/app';\nimport { FirebaseError } from '@firebase/util';\nimport { AppConfig } from '../interfaces/installation-impl';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function extractAppConfig(app: FirebaseApp): AppConfig {\n if (!app || !app.options) {\n throw getMissingValueError('App Configuration');\n }\n\n if (!app.name) {\n throw getMissingValueError('App Name');\n }\n\n // Required app config keys\n const configKeys: Array<keyof FirebaseOptions> = [\n 'projectId',\n 'apiKey',\n 'appId'\n ];\n\n for (const keyName of configKeys) {\n if (!app.options[keyName]) {\n throw getMissingValueError(keyName);\n }\n }\n\n return {\n appName: app.name,\n projectId: app.options.projectId!,\n apiKey: app.options.apiKey!,\n appId: app.options.appId!\n };\n}\n\nfunction getMissingValueError(valueName: string): FirebaseError {\n return ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES, {\n valueName\n });\n}\n","/**\n * @license\n * Copyright 2020 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { _registerComponent, _getProvider } from '@firebase/app';\nimport {\n Component,\n ComponentType,\n InstanceFactory,\n ComponentContainer\n} from '@firebase/component';\nimport { getId, getToken } from '../api/index';\nimport { _FirebaseInstallationsInternal } from '../interfaces/public-types';\nimport { FirebaseInstallationsImpl } from '../interfaces/installation-impl';\nimport { extractAppConfig } from '../helpers/extract-app-config';\n\nconst INSTALLATIONS_NAME = 'installations';\nconst INSTALLATIONS_NAME_INTERNAL = 'installations-internal';\n\nconst publicFactory: InstanceFactory<'installations'> = (\n container: ComponentContainer\n) => {\n const app = container.getProvider('app').getImmediate();\n // Throws if app isn't configured properly.\n const appConfig = extractAppConfig(app);\n const heartbeatServiceProvider = _getProvider(app, 'heartbeat');\n\n const installationsImpl: FirebaseInstallationsImpl = {\n app,\n appConfig,\n heartbeatServiceProvider,\n _delete: () => Promise.resolve()\n };\n return installationsImpl;\n};\n\nconst internalFactory: InstanceFactory<'installations-internal'> = (\n container: ComponentContainer\n) => {\n const app = container.getProvider('app').getImmediate();\n // Internal FIS instance relies on public FIS instance.\n const installations = _getProvider(app, INSTALLATIONS_NAME).getImmediate();\n\n const installationsInternal: _FirebaseInstallationsInternal = {\n getId: () => getId(installations),\n getToken: (forceRefresh?: boolean) => getToken(installations, forceRefresh)\n };\n return installationsInternal;\n};\n\nexport function registerInstallations(): void {\n _registerComponent(\n new Component(INSTALLATIONS_NAME, publicFactory, ComponentType.PUBLIC)\n );\n _registerComponent(\n new Component(\n INSTALLATIONS_NAME_INTERNAL,\n internalFactory,\n ComponentType.PRIVATE\n )\n );\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\nimport { refreshAuthToken } from '../helpers/refresh-auth-token';\nimport { FirebaseInstallationsImpl } from '../interfaces/installation-impl';\nimport { Installations } from '../interfaces/public-types';\n\n/**\n * Creates a Firebase Installation if there isn't one for the app and\n * returns the Installation ID.\n * @param installations - The `Installations` instance.\n *\n * @public\n */\nexport async function getId(installations: Installations): Promise<string> {\n const installationsImpl = installations as FirebaseInstallationsImpl;\n const { installationEntry, registrationPromise } = await getInstallationEntry(\n installationsImpl\n );\n\n if (registrationPromise) {\n registrationPromise.catch(console.error);\n } else {\n // If the installation is already registered, update the authentication\n // token if needed.\n refreshAuthToken(installationsImpl).catch(console.error);\n }\n\n return installationEntry.fid;\n}\n","/**\n * The Firebase Installations Web SDK.\n * This SDK does not work in a Node.js environment.\n *\n * @packageDocumentation\n */\n\n/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { registerInstallations } from './functions/config';\nimport { registerVersion } from '@firebase/app';\nimport { name, version } from '../package.json';\n\nexport * from './api';\nexport * from './interfaces/public-types';\n\nregisterInstallations();\nregisterVersion(name, version);\n// BUILD_TARGET will be replaced by values like esm, cjs, etc during the compilation\nregisterVersion(name, version, '__BUILD_TARGET__');\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { CustomSignals, FetchResponse, FetchType } from '../public_types';\n\n/**\n * Defines a client, as in https://en.wikipedia.org/wiki/Client%E2%80%93server_model, for the\n * Remote Config server (https://firebase.google.com/docs/reference/remote-config/rest).\n *\n * <p>Abstracts throttle, response cache and network implementation details.\n *\n * <p>Modeled after the native {@link GlobalFetch} interface, which is relatively modern and\n * convenient, but simplified for Remote Config's use case.\n *\n * Disambiguation: {@link GlobalFetch} interface and the Remote Config service define \"fetch\"\n * methods. The RestClient uses the former to make HTTP calls. This interface abstracts the latter.\n */\nexport interface RemoteConfigFetchClient {\n /**\n * @throws if response status is not 200 or 304.\n */\n fetch(request: FetchRequest): Promise<FetchResponse>;\n}\n\n/**\n * Shims a minimal AbortSignal.\n *\n * <p>AbortController's AbortSignal conveniently decouples fetch timeout logic from other aspects\n * of networking, such as retries. Firebase doesn't use AbortController enough to justify a\n * polyfill recommendation, like we do with the Fetch API, but this minimal shim can easily be\n * swapped out if/when we do.\n */\nexport class RemoteConfigAbortSignal {\n listeners: Array<() => void> = [];\n addEventListener(listener: () => void): void {\n this.listeners.push(listener);\n }\n abort(): void {\n this.listeners.forEach(listener => listener());\n }\n}\n\n/**\n * Defines per-request inputs for the Remote Config fetch request.\n *\n * <p>Modeled after the native {@link Request} interface, but simplified for Remote Config's\n * use case.\n */\nexport interface FetchRequest {\n /**\n * Uses cached config if it is younger than this age.\n *\n * <p>Required because it's defined by settings, which always have a value.\n *\n * <p>Comparable to passing `headers = { 'Cache-Control': max-age <maxAge> }` to the native\n * Fetch API.\n */\n cacheMaxAgeMillis: number;\n\n /**\n * An event bus for the signal to abort a request.\n *\n * <p>Required because all requests should be abortable.\n *\n * <p>Comparable to the native\n * Fetch API's \"signal\" field on its request configuration object\n * https://fetch.spec.whatwg.org/#dom-requestinit-signal.\n *\n * <p>Disambiguation: Remote Config commonly refers to API inputs as\n * \"signals\". See the private ConfigFetchRequestBody interface for those:\n * http://google3/firebase/remote_config/web/src/core/rest_client.ts?l=14&rcl=255515243.\n */\n signal: RemoteConfigAbortSignal;\n\n /**\n * The ETag header value from the last response.\n *\n * <p>Optional in case this is the first request.\n *\n * <p>Comparable to passing `headers = { 'If-None-Match': <eTag> }` to the native Fetch API.\n */\n eTag?: string;\n\n /** The custom signals stored for the app instance.\n *\n * <p>Optional in case no custom signals are set for the instance.\n */\n customSignals?: CustomSignals;\n\n /**\n * The type of fetch to perform, such as a regular fetch or a real-time fetch.\n *\n * Optional as not all fetch requests need to be distinguished.\n */\n fetchType?: FetchType;\n\n /**\n * The number of fetch attempts made so far for this request.\n *\n * Optional as not all fetch requests are part of a retry series.\n */\n fetchAttempt?: number;\n}\n","/**\n * @license\n * Copyright 2020 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport const RC_COMPONENT_NAME = 'remote-config';\nexport const RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS = 100;\nexport const RC_CUSTOM_SIGNAL_KEY_MAX_LENGTH = 250;\nexport const RC_CUSTOM_SIGNAL_VALUE_MAX_LENGTH = 500;\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { ErrorFactory, FirebaseError } from '@firebase/util';\n\nexport const enum ErrorCode {\n ALREADY_INITIALIZED = 'already-initialized',\n REGISTRATION_WINDOW = 'registration-window',\n REGISTRATION_PROJECT_ID = 'registration-project-id',\n REGISTRATION_API_KEY = 'registration-api-key',\n REGISTRATION_APP_ID = 'registration-app-id',\n STORAGE_OPEN = 'storage-open',\n STORAGE_GET = 'storage-get',\n STORAGE_SET = 'storage-set',\n STORAGE_DELETE = 'storage-delete',\n FETCH_NETWORK = 'fetch-client-network',\n FETCH_TIMEOUT = 'fetch-timeout',\n FETCH_THROTTLE = 'fetch-throttle',\n FETCH_PARSE = 'fetch-client-parse',\n FETCH_STATUS = 'fetch-status',\n INDEXED_DB_UNAVAILABLE = 'indexed-db-unavailable',\n CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS = 'custom-signal-max-allowed-signals',\n CONFIG_UPDATE_STREAM_ERROR = 'stream-error',\n CONFIG_UPDATE_UNAVAILABLE = 'realtime-unavailable',\n CONFIG_UPDATE_MESSAGE_INVALID = 'update-message-invalid',\n CONFIG_UPDATE_NOT_FETCHED = 'update-not-fetched'\n}\n\nconst ERROR_DESCRIPTION_MAP: { readonly [key in ErrorCode]: string } = {\n [ErrorCode.ALREADY_INITIALIZED]: 'Remote Config already initialized',\n [ErrorCode.REGISTRATION_WINDOW]:\n 'Undefined window object. This SDK only supports usage in a browser environment.',\n [ErrorCode.REGISTRATION_PROJECT_ID]:\n 'Undefined project identifier. Check Firebase app initialization.',\n [ErrorCode.REGISTRATION_API_KEY]:\n 'Undefined API key. Check Firebase app initialization.',\n [ErrorCode.REGISTRATION_APP_ID]:\n 'Undefined app identifier. Check Firebase app initialization.',\n [ErrorCode.STORAGE_OPEN]:\n 'Error thrown when opening storage. Original error: {$originalErrorMessage}.',\n [ErrorCode.STORAGE_GET]:\n 'Error thrown when reading from storage. Original error: {$originalErrorMessage}.',\n [ErrorCode.STORAGE_SET]:\n 'Error thrown when writing to storage. Original error: {$originalErrorMessage}.',\n [ErrorCode.STORAGE_DELETE]:\n 'Error thrown when deleting from storage. Original error: {$originalErrorMessage}.',\n [ErrorCode.FETCH_NETWORK]:\n 'Fetch client failed to connect to a network. Check Internet connection.' +\n ' Original error: {$originalErrorMessage}.',\n [ErrorCode.FETCH_TIMEOUT]:\n 'The config fetch request timed out. ' +\n ' Configure timeout using \"fetchTimeoutMillis\" SDK setting.',\n [ErrorCode.FETCH_THROTTLE]:\n 'The config fetch request timed out while in an exponential backoff state.' +\n ' Configure timeout using \"fetchTimeoutMillis\" SDK setting.' +\n ' Unix timestamp in milliseconds when fetch request throttling ends: {$throttleEndTimeMillis}.',\n [ErrorCode.FETCH_PARSE]:\n 'Fetch client could not parse response.' +\n ' Original error: {$originalErrorMessage}.',\n [ErrorCode.FETCH_STATUS]:\n 'Fetch server returned an HTTP error status. HTTP status: {$httpStatus}.',\n [ErrorCode.INDEXED_DB_UNAVAILABLE]:\n 'Indexed DB is not supported by current browser',\n [ErrorCode.CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS]:\n 'Setting more than {$maxSignals} custom signals is not supported.',\n [ErrorCode.CONFIG_UPDATE_STREAM_ERROR]:\n 'The stream was not able to connect to the backend: {$originalErrorMessage}.',\n [ErrorCode.CONFIG_UPDATE_UNAVAILABLE]:\n 'The Realtime service is unavailable: {$originalErrorMessage}',\n [ErrorCode.CONFIG_UPDATE_MESSAGE_INVALID]:\n 'The stream invalidation message was unparsable: {$originalErrorMessage}',\n [ErrorCode.CONFIG_UPDATE_NOT_FETCHED]:\n 'Unable to fetch the latest config: {$originalErrorMessage}'\n};\n\n// Note this is effectively a type system binding a code to params. This approach overlaps with the\n// role of TS interfaces, but works well for a few reasons:\n// 1) JS is unaware of TS interfaces, eg we can't test for interface implementation in JS\n// 2) callers should have access to a human-readable summary of the error and this interpolates\n// params into an error message;\n// 3) callers should be able to programmatically access data associated with an error, which\n// ErrorData provides.\ninterface ErrorParams {\n [ErrorCode.STORAGE_OPEN]: { originalErrorMessage: string | undefined };\n [ErrorCode.STORAGE_GET]: { originalErrorMessage: string | undefined };\n [ErrorCode.STORAGE_SET]: { originalErrorMessage: string | undefined };\n [ErrorCode.STORAGE_DELETE]: { originalErrorMessage: string | undefined };\n [ErrorCode.FETCH_NETWORK]: { originalErrorMessage: string };\n [ErrorCode.FETCH_THROTTLE]: { throttleEndTimeMillis: number };\n [ErrorCode.FETCH_PARSE]: { originalErrorMessage: string };\n [ErrorCode.FETCH_STATUS]: { httpStatus: number };\n [ErrorCode.CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS]: { maxSignals: number };\n [ErrorCode.CONFIG_UPDATE_STREAM_ERROR]: { originalErrorMessage: string };\n [ErrorCode.CONFIG_UPDATE_UNAVAILABLE]: { originalErrorMessage: string };\n [ErrorCode.CONFIG_UPDATE_MESSAGE_INVALID]: { originalErrorMessage: string };\n [ErrorCode.CONFIG_UPDATE_NOT_FETCHED]: { originalErrorMessage: string };\n}\n\nexport const ERROR_FACTORY = new ErrorFactory<ErrorCode, ErrorParams>(\n 'remoteconfig' /* service */,\n 'Remote Config' /* service name */,\n ERROR_DESCRIPTION_MAP\n);\n\n// Note how this is like typeof/instanceof, but for ErrorCode.\nexport function hasErrorCode(e: Error, errorCode: ErrorCode): boolean {\n return e instanceof FirebaseError && e.code.indexOf(errorCode) !== -1;\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { Value as ValueType, ValueSource } from '@firebase/remote-config-types';\n\nconst DEFAULT_VALUE_FOR_BOOLEAN = false;\nconst DEFAULT_VALUE_FOR_STRING = '';\nconst DEFAULT_VALUE_FOR_NUMBER = 0;\n\nconst BOOLEAN_TRUTHY_VALUES = ['1', 'true', 't', 'yes', 'y', 'on'];\n\nexport class Value implements ValueType {\n constructor(\n private readonly _source: ValueSource,\n private readonly _value: string = DEFAULT_VALUE_FOR_STRING\n ) {}\n\n asString(): string {\n return this._value;\n }\n\n asBoolean(): boolean {\n if (this._source === 'static') {\n return DEFAULT_VALUE_FOR_BOOLEAN;\n }\n return BOOLEAN_TRUTHY_VALUES.indexOf(this._value.toLowerCase()) >= 0;\n }\n\n asNumber(): number {\n if (this._source === 'static') {\n return DEFAULT_VALUE_FOR_NUMBER;\n }\n let num = Number(this._value);\n if (isNaN(num)) {\n num = DEFAULT_VALUE_FOR_NUMBER;\n }\n return num;\n }\n\n getSource(): ValueSource {\n return this._source;\n }\n}\n","/**\n * @license\n * Copyright 2020 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { _getProvider, FirebaseApp, getApp } from '@firebase/app';\nimport { deepEqual, getModularInstance } from '@firebase/util';\nimport {\n CustomSignals,\n LogLevel as RemoteConfigLogLevel,\n RemoteConfig,\n Value,\n RemoteConfigOptions,\n ConfigUpdateObserver,\n Unsubscribe\n} from './public_types';\nimport { RemoteConfigAbortSignal } from './client/remote_config_fetch_client';\nimport {\n RC_COMPONENT_NAME,\n RC_CUSTOM_SIGNAL_KEY_MAX_LENGTH,\n RC_CUSTOM_SIGNAL_VALUE_MAX_LENGTH\n} from './constants';\nimport { ERROR_FACTORY, ErrorCode, hasErrorCode } from './errors';\nimport { RemoteConfig as RemoteConfigImpl } from './remote_config';\nimport { Value as ValueImpl } from './value';\nimport { LogLevel as FirebaseLogLevel } from '@firebase/logger';\n\n/**\n *\n * @param app - The {@link @firebase/app#FirebaseApp} instance.\n * @param options - Optional. The {@link RemoteConfigOptions} with which to instantiate the\n * Remote Config instance.\n * @returns A {@link RemoteConfig} instance.\n *\n * @public\n */\nexport function getRemoteConfig(\n app: FirebaseApp = getApp(),\n options: RemoteConfigOptions = {}\n): RemoteConfig {\n app = getModularInstance(app);\n const rcProvider = _getProvider(app, RC_COMPONENT_NAME);\n if (rcProvider.isInitialized()) {\n const initialOptions = rcProvider.getOptions() as RemoteConfigOptions;\n if (deepEqual(initialOptions, options)) {\n return rcProvider.getImmediate();\n }\n throw ERROR_FACTORY.create(ErrorCode.ALREADY_INITIALIZED);\n }\n rcProvider.initialize({ options });\n const rc = rcProvider.getImmediate() as RemoteConfigImpl;\n\n if (options.initialFetchResponse) {\n // We use these initial writes as the initialization promise since they will hydrate the same\n // fields that `storageCache.loadFromStorage` would set.\n rc._initializePromise = Promise.all([\n rc._storage.setLastSuccessfulFetchResponse(options.initialFetchResponse),\n rc._storage.setActiveConfigEtag(options.initialFetchResponse?.eTag || ''),\n rc._storage.setActiveConfigTemplateVersion(\n options.initialFetchResponse.templateVersion || 0\n ),\n rc._storageCache.setLastSuccessfulFetchTimestampMillis(Date.now()),\n rc._storageCache.setLastFetchStatus('success'),\n rc._storageCache.setActiveConfig(\n options.initialFetchResponse?.config || {}\n )\n ]).then();\n // The `storageCache` methods above set their in-memory fields synchronously, so it's\n // safe to declare our initialization complete at this point.\n rc._isInitializationComplete = true;\n }\n\n return rc;\n}\n\n/**\n * Makes the last fetched config available to the getters.\n * @param remoteConfig - The {@link RemoteConfig} instance.\n * @returns A `Promise` which resolves to true if the current call activated the fetched configs.\n * If the fetched configs were already activated, the `Promise` will resolve to false.\n *\n * @public\n */\nexport async function activate(remoteConfig: RemoteConfig): Promise<boolean> {\n const rc = getModularInstance(remoteConfig) as RemoteConfigImpl;\n const [lastSuccessfulFetchResponse, activeConfigEtag] = await Promise.all([\n rc._storage.getLastSuccessfulFetchResponse(),\n rc._storage.getActiveConfigEtag()\n ]);\n if (\n !lastSuccessfulFetchResponse ||\n !lastSuccessfulFetchResponse.config ||\n !lastSuccessfulFetchResponse.eTag ||\n !lastSuccessfulFetchResponse.templateVersion ||\n lastSuccessfulFetchResponse.eTag === activeConfigEtag\n ) {\n // Either there is no successful fetched config, or is the same as current active\n // config.\n return false;\n }\n await Promise.all([\n rc._storageCache.setActiveConfig(lastSuccessfulFetchResponse.config),\n rc._storage.setActiveConfigEtag(lastSuccessfulFetchResponse.eTag),\n rc._storage.setActiveConfigTemplateVersion(\n lastSuccessfulFetchResponse.templateVersion\n )\n ]);\n return true;\n}\n\n/**\n * Ensures the last activated config are available to the getters.\n * @param remoteConfig - The {@link RemoteConfig} instance.\n *\n * @returns A `Promise` that resolves when the last activated config is available to the getters.\n * @public\n */\nexport function ensureInitialized(remoteConfig: RemoteConfig): Promise<void> {\n const rc = getModularInstance(remoteConfig) as RemoteConfigImpl;\n if (!rc._initializePromise) {\n rc._initializePromise = rc._storageCache.loadFromStorage().then(() => {\n rc._isInitializationComplete = true;\n });\n }\n return rc._initializePromise;\n}\n\n/**\n * Fetches and caches configuration from the Remote Config service.\n * @param remoteConfig - The {@link RemoteConfig} instance.\n * @public\n */\nexport async function fetchConfig(remoteConfig: RemoteConfig): Promise<void> {\n const rc = getModularInstance(remoteConfig) as RemoteConfigImpl;\n // Aborts the request after the given timeout, causing the fetch call to\n // reject with an `AbortError`.\n //\n // <p>Aborting after the request completes is a no-op, so we don't need a\n // corresponding `clearTimeout`.\n //\n // Locating abort logic here because:\n // * it uses a developer setting (timeout)\n // * it applies to all retries (like curl's max-time arg)\n // * it is consistent with the Fetch API's signal input\n const abortSignal = new RemoteConfigAbortSignal();\n\n setTimeout(async () => {\n // Note a very low delay, eg < 10ms, can elapse before listeners are initialized.\n abortSignal.abort();\n }, rc.settings.fetchTimeoutMillis);\n\n const customSignals = rc._storageCache.getCustomSignals();\n if (customSignals) {\n rc._logger.debug(\n `Fetching config with custom signals: ${JSON.stringify(customSignals)}`\n );\n }\n // Catches *all* errors thrown by client so status can be set consistently.\n try {\n await rc._client.fetch({\n cacheMaxAgeMillis: rc.settings.minimumFetchIntervalMillis,\n signal: abortSignal,\n customSignals\n });\n\n await rc._storageCache.setLastFetchStatus('success');\n } catch (e) {\n const lastFetchStatus = hasErrorCode(e as Error, ErrorCode.FETCH_THROTTLE)\n ? 'throttle'\n : 'failure';\n await rc._storageCache.setLastFetchStatus(lastFetchStatus);\n throw e;\n }\n}\n\n/**\n * Gets all config.\n *\n * @param remoteConfig - The {@link RemoteConfig} instance.\n * @returns All config.\n *\n * @public\n */\nexport function getAll(remoteConfig: RemoteConfig): Record<string, Value> {\n const rc = getModularInstance(remoteConfig) as RemoteConfigImpl;\n return getAllKeys(\n rc._storageCache.getActiveConfig(),\n rc.defaultConfig\n ).reduce((allConfigs, key) => {\n allConfigs[key] = getValue(remoteConfig, key);\n return allConfigs;\n }, {} as Record<string, Value>);\n}\n\n/**\n * Gets the value for the given key as a boolean.\n *\n * Convenience method for calling <code>remoteConfig.getValue(key).asBoolean()</code>.\n *\n * @param remoteConfig - The {@link RemoteConfig} instance.\n * @param key - The name of the parameter.\n *\n * @returns The value for the given key as a boolean.\n * @public\n */\nexport function getBoolean(remoteConfig: RemoteConfig, key: string): boolean {\n return getValue(getModularInstance(remoteConfig), key).asBoolean();\n}\n\n/**\n * Gets the value for the given key as a number.\n *\n * Convenience method for calling <code>remoteConfig.getValue(key).asNumber()</code>.\n *\n * @param remoteConfig - The {@link RemoteConfig} instance.\n * @param key - The name of the parameter.\n *\n * @returns The value for the given key as a number.\n *\n * @public\n */\nexport function getNumber(remoteConfig: RemoteConfig, key: string): number {\n return getValue(getModularInstance(remoteConfig), key).asNumber();\n}\n\n/**\n * Gets the value for the given key as a string.\n * Convenience method for calling <code>remoteConfig.getValue(key).asString()</code>.\n *\n * @param remoteConfig - The {@link RemoteConfig} instance.\n * @param key - The name of the parameter.\n *\n * @returns The value for the given key as a string.\n *\n * @public\n */\nexport function getString(remoteConfig: RemoteConfig, key: string): string {\n return getValue(getModularInstance(remoteConfig), key).asString();\n}\n\n/**\n * Gets the {@link Value} for the given key.\n *\n * @param remoteConfig - The {@link RemoteConfig} instance.\n * @param key - The name of the parameter.\n *\n * @returns The value for the given key.\n *\n * @public\n */\nexport function getValue(remoteConfig: RemoteConfig, key: string): Value {\n const rc = getModularInstance(remoteConfig) as RemoteConfigImpl;\n if (!rc._isInitializationComplete) {\n rc._logger.debug(\n `A value was requested for key \"${key}\" before SDK initialization completed.` +\n ' Await on ensureInitialized if the intent was to get a previously activated value.'\n );\n }\n const activeConfig = rc._storageCache.getActiveConfig();\n if (activeConfig && activeConfig[key] !== undefined) {\n return new ValueImpl('remote', activeConfig[key]);\n } else if (rc.defaultConfig && rc.defaultConfig[key] !== undefined) {\n return new ValueImpl('default', String(rc.defaultConfig[key]));\n }\n rc._logger.debug(\n `Returning static value for key \"${key}\".` +\n ' Define a default or remote value if this is unintentional.'\n );\n return new ValueImpl('static');\n}\n\n/**\n * Defines the log level to use.\n *\n * @param remoteConfig - The {@link RemoteConfig} instance.\n * @param logLevel - The log level to set.\n *\n * @public\n */\nexport function setLogLevel(\n remoteConfig: RemoteConfig,\n logLevel: RemoteConfigLogLevel\n): void {\n const rc = getModularInstance(remoteConfig) as RemoteConfigImpl;\n switch (logLevel) {\n case 'debug':\n rc._logger.logLevel = FirebaseLogLevel.DEBUG;\n break;\n case 'silent':\n rc._logger.logLevel = FirebaseLogLevel.SILENT;\n break;\n default:\n rc._logger.logLevel = FirebaseLogLevel.ERROR;\n }\n}\n\n/**\n * Dedupes and returns an array of all the keys of the received objects.\n */\nfunction getAllKeys(obj1: {} = {}, obj2: {} = {}): string[] {\n return Object.keys({ ...obj1, ...obj2 });\n}\n\n/**\n * Sets the custom signals for the app instance.\n *\n * @param remoteConfig - The {@link RemoteConfig} instance.\n * @param customSignals - Map (key, value) of the custom signals to be set for the app instance. If\n * a key already exists, the value is overwritten. Setting the value of a custom signal to null\n * unsets the signal. The signals will be persisted locally on the client.\n *\n * @public\n */\nexport async function setCustomSignals(\n remoteConfig: RemoteConfig,\n customSignals: CustomSignals\n): Promise<void> {\n const rc = getModularInstance(remoteConfig) as RemoteConfigImpl;\n if (Object.keys(customSignals).length === 0) {\n return;\n }\n\n // eslint-disable-next-line guard-for-in\n for (const key in customSignals) {\n if (key.length > RC_CUSTOM_SIGNAL_KEY_MAX_LENGTH) {\n rc._logger.error(\n `Custom signal key ${key} is too long, max allowed length is ${RC_CUSTOM_SIGNAL_KEY_MAX_LENGTH}.`\n );\n return;\n }\n const value = customSignals[key];\n if (\n typeof value === 'string' &&\n value.length > RC_CUSTOM_SIGNAL_VALUE_MAX_LENGTH\n ) {\n rc._logger.error(\n `Value supplied for custom signal ${key} is too long, max allowed length is ${RC_CUSTOM_SIGNAL_VALUE_MAX_LENGTH}.`\n );\n return;\n }\n }\n\n try {\n await rc._storageCache.setCustomSignals(customSignals);\n } catch (error) {\n rc._logger.error(\n `Error encountered while setting custom signals: ${error}`\n );\n }\n}\n\n// TODO: Add public document for the Remote Config Realtime API guide on the Web Platform.\n/**\n * Starts listening for real-time config updates from the Remote Config backend and automatically\n * fetches updates from the Remote Config backend when they are available.\n *\n * @remarks\n * If a connection to the Remote Config backend is not already open, calling this method will\n * open it. Multiple listeners can be added by calling this method again, but subsequent calls\n * re-use the same connection to the backend.\n *\n * @param remoteConfig - The {@link RemoteConfig} instance.\n * @param observer - The {@link ConfigUpdateObserver} to be notified of config updates.\n * @returns An {@link Unsubscribe} function to remove the listener.\n *\n * @public\n */\nexport function onConfigUpdate(\n remoteConfig: RemoteConfig,\n observer: ConfigUpdateObserver\n): Unsubscribe {\n const rc = getModularInstance(remoteConfig) as RemoteConfigImpl;\n rc._realtimeHandler.addObserver(observer);\n return () => {\n rc._realtimeHandler.removeObserver(observer);\n };\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { StorageCache } from '../storage/storage_cache';\nimport { FetchResponse } from '../public_types';\nimport {\n RemoteConfigFetchClient,\n FetchRequest\n} from './remote_config_fetch_client';\nimport { Storage } from '../storage/storage';\nimport { Logger } from '@firebase/logger';\n\n/**\n * Implements the {@link RemoteConfigClient} abstraction with success response caching.\n *\n * <p>Comparable to the browser's Cache API for responses, but the Cache API requires a Service\n * Worker, which requires HTTPS, which would significantly complicate SDK installation. Also, the\n * Cache API doesn't support matching entries by time.\n */\nexport class CachingClient implements RemoteConfigFetchClient {\n constructor(\n private readonly client: RemoteConfigFetchClient,\n private readonly storage: Storage,\n private readonly storageCache: StorageCache,\n private readonly logger: Logger\n ) {}\n\n /**\n * Returns true if the age of the cached fetched configs is less than or equal to\n * {@link Settings#minimumFetchIntervalInSeconds}.\n *\n * <p>This is comparable to passing `headers = { 'Cache-Control': max-age <maxAge> }` to the\n * native Fetch API.\n *\n * <p>Visible for testing.\n */\n isCachedDataFresh(\n cacheMaxAgeMillis: number,\n lastSuccessfulFetchTimestampMillis: number | undefined\n ): boolean {\n // Cache can only be fresh if it's populated.\n if (!lastSuccessfulFetchTimestampMillis) {\n this.logger.debug('Config fetch cache check. Cache unpopulated.');\n return false;\n }\n\n // Calculates age of cache entry.\n const cacheAgeMillis = Date.now() - lastSuccessfulFetchTimestampMillis;\n\n const isCachedDataFresh = cacheAgeMillis <= cacheMaxAgeMillis;\n\n this.logger.debug(\n 'Config fetch cache check.' +\n ` Cache age millis: ${cacheAgeMillis}.` +\n ` Cache max age millis (minimumFetchIntervalMillis setting): ${cacheMaxAgeMillis}.` +\n ` Is cache hit: ${isCachedDataFresh}.`\n );\n\n return isCachedDataFresh;\n }\n\n async fetch(request: FetchRequest): Promise<FetchResponse> {\n // Reads from persisted storage to avoid cache miss if callers don't wait on initialization.\n const [lastSuccessfulFetchTimestampMillis, lastSuccessfulFetchResponse] =\n await Promise.all([\n this.storage.getLastSuccessfulFetchTimestampMillis(),\n this.storage.getLastSuccessfulFetchResponse()\n ]);\n\n // Exits early on cache hit.\n if (\n lastSuccessfulFetchResponse &&\n this.isCachedDataFresh(\n request.cacheMaxAgeMillis,\n lastSuccessfulFetchTimestampMillis\n )\n ) {\n return lastSuccessfulFetchResponse;\n }\n\n // Deviates from pure decorator by not honoring a passed ETag since we don't have a public API\n // that allows the caller to pass an ETag.\n request.eTag =\n lastSuccessfulFetchResponse && lastSuccessfulFetchResponse.eTag;\n\n // Falls back to service on cache miss.\n const response = await this.client.fetch(request);\n\n // Fetch throws for non-success responses, so success is guaranteed here.\n\n const storageOperations = [\n // Uses write-through cache for consistency with synchronous public API.\n this.storageCache.setLastSuccessfulFetchTimestampMillis(Date.now())\n ];\n\n if (response.status === 200) {\n // Caches response only if it has changed, ie non-304 responses.\n storageOperations.push(\n this.storage.setLastSuccessfulFetchResponse(response)\n );\n }\n\n await Promise.all(storageOperations);\n\n return response;\n }\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * Attempts to get the most accurate browser language setting.\n *\n * <p>Adapted from getUserLanguage in packages/auth/src/utils.js for TypeScript.\n *\n * <p>Defers default language specification to server logic for consistency.\n *\n * @param navigatorLanguage Enables tests to override read-only {@link NavigatorLanguage}.\n */\nexport function getUserLanguage(\n navigatorLanguage: NavigatorLanguage = navigator\n): string {\n return (\n // Most reliable, but only supported in Chrome/Firefox.\n (navigatorLanguage.languages && navigatorLanguage.languages[0]) ||\n // Supported in most browsers, but returns the language of the browser\n // UI, not the language set in browser settings.\n navigatorLanguage.language\n // Polyfill otherwise.\n );\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n CustomSignals,\n FetchResponse,\n FirebaseRemoteConfigObject\n} from '../public_types';\nimport {\n RemoteConfigFetchClient,\n FetchRequest\n} from './remote_config_fetch_client';\nimport { ERROR_FACTORY, ErrorCode } from '../errors';\nimport { getUserLanguage } from '../language';\nimport { _FirebaseInstallationsInternal } from '@firebase/installations';\n\n/**\n * Defines request body parameters required to call the fetch API:\n * https://firebase.google.com/docs/reference/remote-config/rest\n *\n * <p>Not exported because this file encapsulates REST API specifics.\n *\n * <p>Not passing User Properties because Analytics' source of truth on Web is server-side.\n */\ninterface FetchRequestBody {\n // Disables camelcase linting for request body params.\n /* eslint-disable camelcase*/\n sdk_version: string;\n app_instance_id: string;\n app_instance_id_token: string;\n app_id: string;\n language_code: string;\n custom_signals?: CustomSignals;\n /* eslint-enable camelcase */\n}\n\n/**\n * Implements the Client abstraction for the Remote Config REST API.\n */\nexport class RestClient implements RemoteConfigFetchClient {\n constructor(\n private readonly firebaseInstallations: _FirebaseInstallationsInternal,\n private readonly sdkVersion: string,\n private readonly namespace: string,\n private readonly projectId: string,\n private readonly apiKey: string,\n private readonly appId: string\n ) {}\n\n /**\n * Fetches from the Remote Config REST API.\n *\n * @throws a {@link ErrorCode.FETCH_NETWORK} error if {@link GlobalFetch#fetch} can't\n * connect to the network.\n * @throws a {@link ErrorCode.FETCH_PARSE} error if {@link Response#json} can't parse the\n * fetch response.\n * @throws a {@link ErrorCode.FETCH_STATUS} error if the service returns an HTTP error status.\n */\n async fetch(request: FetchRequest): Promise<FetchResponse> {\n const [installationId, installationToken] = await Promise.all([\n this.firebaseInstallations.getId(),\n this.firebaseInstallations.getToken()\n ]);\n\n const urlBase =\n window.FIREBASE_REMOTE_CONFIG_URL_BASE ||\n 'https://firebaseremoteconfig.googleapis.com';\n\n const url = `${urlBase}/v1/projects/${this.projectId}/namespaces/${this.namespace}:fetch?key=${this.apiKey}`;\n\n const headers = {\n 'Content-Type': 'application/json',\n 'Content-Encoding': 'gzip',\n // Deviates from pure decorator by not passing max-age header since we don't currently have\n // service behavior using that header.\n 'If-None-Match': request.eTag || '*'\n // TODO: Add this header once CORS error is fixed internally.\n //'X-Firebase-RC-Fetch-Type': `${fetchType}/${fetchAttempt}`\n };\n\n const requestBody: FetchRequestBody = {\n /* eslint-disable camelcase */\n sdk_version: this.sdkVersion,\n app_instance_id: installationId,\n app_instance_id_token: installationToken,\n app_id: this.appId,\n language_code: getUserLanguage(),\n custom_signals: request.customSignals\n /* eslint-enable camelcase */\n };\n\n const options = {\n method: 'POST',\n headers,\n body: JSON.stringify(requestBody)\n };\n\n // This logic isn't REST-specific, but shimming abort logic isn't worth another decorator.\n const fetchPromise = fetch(url, options);\n const timeoutPromise = new Promise((_resolve, reject) => {\n // Maps async event listener to Promise API.\n request.signal.addEventListener(() => {\n // Emulates https://heycam.github.io/webidl/#aborterror\n const error = new Error('The operation was aborted.');\n error.name = 'AbortError';\n reject(error);\n });\n });\n\n let response;\n try {\n await Promise.race([fetchPromise, timeoutPromise]);\n response = await fetchPromise;\n } catch (originalError) {\n let errorCode = ErrorCode.FETCH_NETWORK;\n if ((originalError as Error)?.name === 'AbortError') {\n errorCode = ErrorCode.FETCH_TIMEOUT;\n }\n throw ERROR_FACTORY.create(errorCode, {\n originalErrorMessage: (originalError as Error)?.message\n });\n }\n\n let status = response.status;\n\n // Normalizes nullable header to optional.\n const responseEtag = response.headers.get('ETag') || undefined;\n\n let config: FirebaseRemoteConfigObject | undefined;\n let state: string | undefined;\n let templateVersion: number | undefined;\n\n // JSON parsing throws SyntaxError if the response body isn't a JSON string.\n // Requesting application/json and checking for a 200 ensures there's JSON data.\n if (response.status === 200) {\n let responseBody;\n try {\n responseBody = await response.json();\n } catch (originalError) {\n throw ERROR_FACTORY.create(ErrorCode.FETCH_PARSE, {\n originalErrorMessage: (originalError as Error)?.message\n });\n }\n config = responseBody['entries'];\n state = responseBody['state'];\n templateVersion = responseBody['templateVersion'];\n }\n\n // Normalizes based on legacy state.\n if (state === 'INSTANCE_STATE_UNSPECIFIED') {\n status = 500;\n } else if (state === 'NO_CHANGE') {\n status = 304;\n } else if (state === 'NO_TEMPLATE' || state === 'EMPTY_CONFIG') {\n // These cases can be fixed remotely, so normalize to safe value.\n config = {};\n }\n\n // Normalize to exception-based control flow for non-success cases.\n // Encapsulates HTTP specifics in this class as much as possible. Status is still the best for\n // differentiating success states (200 from 304; the state body param is undefined in a\n // standard 304).\n if (status !== 304 && status !== 200) {\n throw ERROR_FACTORY.create(ErrorCode.FETCH_STATUS, {\n httpStatus: status\n });\n }\n\n return { status, eTag: responseEtag, config, templateVersion };\n }\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FetchResponse } from '../public_types';\nimport {\n RemoteConfigAbortSignal,\n RemoteConfigFetchClient,\n FetchRequest\n} from './remote_config_fetch_client';\nimport { ThrottleMetadata, Storage } from '../storage/storage';\nimport { ErrorCode, ERROR_FACTORY } from '../errors';\nimport { FirebaseError, calculateBackoffMillis } from '@firebase/util';\n\n/**\n * Supports waiting on a backoff by:\n *\n * <ul>\n * <li>Promisifying setTimeout, so we can set a timeout in our Promise chain</li>\n * <li>Listening on a signal bus for abort events, just like the Fetch API</li>\n * <li>Failing in the same way the Fetch API fails, so timing out a live request and a throttled\n * request appear the same.</li>\n * </ul>\n *\n * <p>Visible for testing.\n */\nexport function setAbortableTimeout(\n signal: RemoteConfigAbortSignal,\n throttleEndTimeMillis: number\n): Promise<void> {\n return new Promise((resolve, reject) => {\n // Derives backoff from given end time, normalizing negative numbers to zero.\n const backoffMillis = Math.max(throttleEndTimeMillis - Date.now(), 0);\n\n const timeout = setTimeout(resolve, backoffMillis);\n\n // Adds listener, rather than sets onabort, because signal is a shared object.\n signal.addEventListener(() => {\n clearTimeout(timeout);\n\n // If the request completes before this timeout, the rejection has no effect.\n reject(\n ERROR_FACTORY.create(ErrorCode.FETCH_THROTTLE, {\n throttleEndTimeMillis\n })\n );\n });\n });\n}\n\ntype RetriableError = FirebaseError & { customData: { httpStatus: string } };\n/**\n * Returns true if the {@link Error} indicates a fetch request may succeed later.\n */\nfunction isRetriableError(e: Error): e is RetriableError {\n if (!(e instanceof FirebaseError) || !e.customData) {\n return false;\n }\n\n // Uses string index defined by ErrorData, which FirebaseError implements.\n const httpStatus = Number(e.customData['httpStatus']);\n\n return (\n httpStatus === 429 ||\n httpStatus === 500 ||\n httpStatus === 503 ||\n httpStatus === 504\n );\n}\n\n/**\n * Decorates a Client with retry logic.\n *\n * <p>Comparable to CachingClient, but uses backoff logic instead of cache max age and doesn't cache\n * responses (because the SDK has no use for error responses).\n */\nexport class RetryingClient implements RemoteConfigFetchClient {\n constructor(\n private readonly client: RemoteConfigFetchClient,\n private readonly storage: Storage\n ) {}\n\n async fetch(request: FetchRequest): Promise<FetchResponse> {\n const throttleMetadata = (await this.storage.getThrottleMetadata()) || {\n backoffCount: 0,\n throttleEndTimeMillis: Date.now()\n };\n\n return this.attemptFetch(request, throttleMetadata);\n }\n\n /**\n * A recursive helper for attempting a fetch request repeatedly.\n *\n * @throws any non-retriable errors.\n */\n async attemptFetch(\n request: FetchRequest,\n { throttleEndTimeMillis, backoffCount }: ThrottleMetadata\n ): Promise<FetchResponse> {\n // Starts with a (potentially zero) timeout to support resumption from stored state.\n // Ensures the throttle end time is honored if the last attempt timed out.\n // Note the SDK will never make a request if the fetch timeout expires at this point.\n await setAbortableTimeout(request.signal, throttleEndTimeMillis);\n\n try {\n const response = await this.client.fetch(request);\n\n // Note the SDK only clears throttle state if response is success or non-retriable.\n await this.storage.deleteThrottleMetadata();\n\n return response;\n } catch (e) {\n if (!isRetriableError(e as Error)) {\n throw e;\n }\n\n // Increments backoff state.\n const throttleMetadata = {\n throttleEndTimeMillis:\n Date.now() + calculateBackoffMillis(backoffCount),\n backoffCount: backoffCount + 1\n };\n\n // Persists state.\n await this.storage.setThrottleMetadata(throttleMetadata);\n\n return this.attemptFetch(request, throttleMetadata);\n }\n }\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app';\nimport {\n RemoteConfig as RemoteConfigType,\n FetchStatus,\n RemoteConfigSettings\n} from './public_types';\nimport { StorageCache } from './storage/storage_cache';\nimport { RemoteConfigFetchClient } from './client/remote_config_fetch_client';\nimport { Storage } from './storage/storage';\nimport { Logger } from '@firebase/logger';\nimport { RealtimeHandler } from './client/realtime_handler';\n\nconst DEFAULT_FETCH_TIMEOUT_MILLIS = 60 * 1000; // One minute\nconst DEFAULT_CACHE_MAX_AGE_MILLIS = 12 * 60 * 60 * 1000; // Twelve hours.\n\n/**\n * Encapsulates business logic mapping network and storage dependencies to the public SDK API.\n *\n * See {@link https://github.com/firebase/firebase-js-sdk/blob/main/packages/firebase/compat/index.d.ts|interface documentation} for method descriptions.\n */\nexport class RemoteConfig implements RemoteConfigType {\n /**\n * Tracks completion of initialization promise.\n * @internal\n */\n _isInitializationComplete = false;\n\n /**\n * De-duplicates initialization calls.\n * @internal\n */\n _initializePromise?: Promise<void>;\n\n settings: RemoteConfigSettings = {\n fetchTimeoutMillis: DEFAULT_FETCH_TIMEOUT_MILLIS,\n minimumFetchIntervalMillis: DEFAULT_CACHE_MAX_AGE_MILLIS\n };\n\n defaultConfig: { [key: string]: string | number | boolean } = {};\n\n get fetchTimeMillis(): number {\n return this._storageCache.getLastSuccessfulFetchTimestampMillis() || -1;\n }\n\n get lastFetchStatus(): FetchStatus {\n return this._storageCache.getLastFetchStatus() || 'no-fetch-yet';\n }\n\n constructor(\n // Required by FirebaseServiceFactory interface.\n readonly app: FirebaseApp,\n // JS doesn't support private yet\n // (https://github.com/tc39/proposal-class-fields#private-fields), so we hint using an\n // underscore prefix.\n /**\n * @internal\n */\n readonly _client: RemoteConfigFetchClient,\n /**\n * @internal\n */\n readonly _storageCache: StorageCache,\n /**\n * @internal\n */\n readonly _storage: Storage,\n /**\n * @internal\n */\n readonly _logger: Logger,\n /**\n * @internal\n */\n readonly _realtimeHandler: RealtimeHandler\n ) {}\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FetchStatus, CustomSignals } from '@firebase/remote-config-types';\nimport { FetchResponse, FirebaseRemoteConfigObject } from '../public_types';\nimport { ERROR_FACTORY, ErrorCode } from '../errors';\nimport { RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS } from '../constants';\nimport { FirebaseError } from '@firebase/util';\n\n/**\n * Converts an error event associated with a {@link IDBRequest} to a {@link FirebaseError}.\n */\nfunction toFirebaseError(event: Event, errorCode: ErrorCode): FirebaseError {\n const originalError = (event.target as IDBRequest).error || undefined;\n return ERROR_FACTORY.create(errorCode, {\n originalErrorMessage: originalError && (originalError as Error)?.message\n });\n}\n\n/**\n * A general-purpose store keyed by app + namespace + {@link\n * ProjectNamespaceKeyFieldValue}.\n *\n * <p>The Remote Config SDK can be used with multiple app installations, and each app can interact\n * with multiple namespaces, so this store uses app (ID + name) and namespace as common parent keys\n * for a set of key-value pairs. See {@link Storage#createCompositeKey}.\n *\n * <p>Visible for testing.\n */\nexport const APP_NAMESPACE_STORE = 'app_namespace_store';\n\nconst DB_NAME = 'firebase_remote_config';\nconst DB_VERSION = 1;\n\n/**\n * Encapsulates metadata concerning throttled fetch requests.\n */\nexport interface ThrottleMetadata {\n // The number of times fetch has backed off. Used for resuming backoff after a timeout.\n backoffCount: number;\n // The Unix timestamp in milliseconds when callers can retry a request.\n throttleEndTimeMillis: number;\n}\n\nexport interface RealtimeBackoffMetadata {\n // The number of consecutive connection streams that have failed.\n numFailedStreams: number;\n // The Date until which the client should wait before attempting any new real-time connections.\n backoffEndTimeMillis: Date;\n}\n\n/**\n * Provides type-safety for the \"key\" field used by {@link APP_NAMESPACE_STORE}.\n *\n * <p>This seems like a small price to avoid potentially subtle bugs caused by a typo.\n */\ntype ProjectNamespaceKeyFieldValue =\n | 'active_config'\n | 'active_config_etag'\n | 'last_fetch_status'\n | 'last_successful_fetch_timestamp_millis'\n | 'last_successful_fetch_response'\n | 'settings'\n | 'throttle_metadata'\n | 'custom_signals'\n | 'realtime_backoff_metadata'\n | 'last_known_template_version';\n\n// Visible for testing.\nexport function openDatabase(): Promise<IDBDatabase> {\n return new Promise((resolve, reject) => {\n try {\n const request = indexedDB.open(DB_NAME, DB_VERSION);\n request.onerror = event => {\n reject(toFirebaseError(event, ErrorCode.STORAGE_OPEN));\n };\n request.onsuccess = event => {\n resolve((event.target as IDBOpenDBRequest).result);\n };\n request.onupgradeneeded = event => {\n const db = (event.target as IDBOpenDBRequest).result;\n\n // We don't use 'break' in this switch statement, the fall-through\n // behavior is what we want, because if there are multiple versions between\n // the old version and the current version, we want ALL the migrations\n // that correspond to those versions to run, not only the last one.\n // eslint-disable-next-line default-case\n switch (event.oldVersion) {\n case 0:\n db.createObjectStore(APP_NAMESPACE_STORE, {\n keyPath: 'compositeKey'\n });\n }\n };\n } catch (error) {\n reject(\n ERROR_FACTORY.create(ErrorCode.STORAGE_OPEN, {\n originalErrorMessage: (error as Error)?.message\n })\n );\n }\n });\n}\n\n/**\n * Abstracts data persistence.\n */\nexport abstract class Storage {\n getLastFetchStatus(): Promise<FetchStatus | undefined> {\n return this.get<FetchStatus>('last_fetch_status');\n }\n\n setLastFetchStatus(status: FetchStatus): Promise<void> {\n return this.set<FetchStatus>('last_fetch_status', status);\n }\n\n // This is comparable to a cache entry timestamp. If we need to expire other data, we could\n // consider adding timestamp to all storage records and an optional max age arg to getters.\n getLastSuccessfulFetchTimestampMillis(): Promise<number | undefined> {\n return this.get<number>('last_successful_fetch_timestamp_millis');\n }\n\n setLastSuccessfulFetchTimestampMillis(timestamp: number): Promise<void> {\n return this.set<number>(\n 'last_successful_fetch_timestamp_millis',\n timestamp\n );\n }\n\n getLastSuccessfulFetchResponse(): Promise<FetchResponse | undefined> {\n return this.get<FetchResponse>('last_successful_fetch_response');\n }\n\n setLastSuccessfulFetchResponse(response: FetchResponse): Promise<void> {\n return this.set<FetchResponse>('last_successful_fetch_response', response);\n }\n\n getActiveConfig(): Promise<FirebaseRemoteConfigObject | undefined> {\n return this.get<FirebaseRemoteConfigObject>('active_config');\n }\n\n setActiveConfig(config: FirebaseRemoteConfigObject): Promise<void> {\n return this.set<FirebaseRemoteConfigObject>('active_config', config);\n }\n\n getActiveConfigEtag(): Promise<string | undefined> {\n return this.get<string>('active_config_etag');\n }\n\n setActiveConfigEtag(etag: string): Promise<void> {\n return this.set<string>('active_config_etag', etag);\n }\n\n getThrottleMetadata(): Promise<ThrottleMetadata | undefined> {\n return this.get<ThrottleMetadata>('throttle_metadata');\n }\n\n setThrottleMetadata(metadata: ThrottleMetadata): Promise<void> {\n return this.set<ThrottleMetadata>('throttle_metadata', metadata);\n }\n\n deleteThrottleMetadata(): Promise<void> {\n return this.delete('throttle_metadata');\n }\n\n getCustomSignals(): Promise<CustomSignals | undefined> {\n return this.get<CustomSignals>('custom_signals');\n }\n\n abstract setCustomSignals(\n customSignals: CustomSignals\n ): Promise<CustomSignals>;\n abstract get<T>(key: ProjectNamespaceKeyFieldValue): Promise<T | undefined>;\n abstract set<T>(key: ProjectNamespaceKeyFieldValue, value: T): Promise<void>;\n abstract delete(key: ProjectNamespaceKeyFieldValue): Promise<void>;\n\n getRealtimeBackoffMetadata(): Promise<RealtimeBackoffMetadata | undefined> {\n return this.get<RealtimeBackoffMetadata>('realtime_backoff_metadata');\n }\n\n setRealtimeBackoffMetadata(\n realtimeMetadata: RealtimeBackoffMetadata\n ): Promise<void> {\n return this.set<RealtimeBackoffMetadata>(\n 'realtime_backoff_metadata',\n realtimeMetadata\n );\n }\n\n getActiveConfigTemplateVersion(): Promise<number | undefined> {\n return this.get<number>('last_known_template_version');\n }\n\n setActiveConfigTemplateVersion(version: number): Promise<void> {\n return this.set<number>('last_known_template_version', version);\n }\n}\n\nexport class IndexedDbStorage extends Storage {\n /**\n * @param appId enables storage segmentation by app (ID + name).\n * @param appName enables storage segmentation by app (ID + name).\n * @param namespace enables storage segmentation by namespace.\n */\n constructor(\n private readonly appId: string,\n private readonly appName: string,\n private readonly namespace: string,\n private readonly openDbPromise = openDatabase()\n ) {\n super();\n }\n\n async setCustomSignals(customSignals: CustomSignals): Promise<CustomSignals> {\n const db = await this.openDbPromise;\n const transaction = db.transaction([APP_NAMESPACE_STORE], 'readwrite');\n const storedSignals = await this.getWithTransaction<CustomSignals>(\n 'custom_signals',\n transaction\n );\n const updatedSignals = mergeCustomSignals(\n customSignals,\n storedSignals || {}\n );\n await this.setWithTransaction<CustomSignals>(\n 'custom_signals',\n updatedSignals,\n transaction\n );\n return updatedSignals;\n }\n\n /**\n * Gets a value from the database using the provided transaction.\n *\n * @param key The key of the value to get.\n * @param transaction The transaction to use for the operation.\n * @returns The value associated with the key, or undefined if no such value exists.\n */\n async getWithTransaction<T>(\n key: ProjectNamespaceKeyFieldValue,\n transaction: IDBTransaction\n ): Promise<T | undefined> {\n return new Promise((resolve, reject) => {\n const objectStore = transaction.objectStore(APP_NAMESPACE_STORE);\n const compositeKey = this.createCompositeKey(key);\n try {\n const request = objectStore.get(compositeKey);\n request.onerror = event => {\n reject(toFirebaseError(event, ErrorCode.STORAGE_GET));\n };\n request.onsuccess = event => {\n const result = (event.target as IDBRequest).result;\n if (result) {\n resolve(result.value);\n } else {\n resolve(undefined);\n }\n };\n } catch (e) {\n reject(\n ERROR_FACTORY.create(ErrorCode.STORAGE_GET, {\n originalErrorMessage: (e as Error)?.message\n })\n );\n }\n });\n }\n\n /**\n * Sets a value in the database using the provided transaction.\n *\n * @param key The key of the value to set.\n * @param value The value to set.\n * @param transaction The transaction to use for the operation.\n * @returns A promise that resolves when the operation is complete.\n */\n async setWithTransaction<T>(\n key: ProjectNamespaceKeyFieldValue,\n value: T,\n transaction: IDBTransaction\n ): Promise<void> {\n return new Promise((resolve, reject) => {\n const objectStore = transaction.objectStore(APP_NAMESPACE_STORE);\n const compositeKey = this.createCompositeKey(key);\n try {\n const request = objectStore.put({\n compositeKey,\n value\n });\n request.onerror = (event: Event) => {\n reject(toFirebaseError(event, ErrorCode.STORAGE_SET));\n };\n request.onsuccess = () => {\n resolve();\n };\n } catch (e) {\n reject(\n ERROR_FACTORY.create(ErrorCode.STORAGE_SET, {\n originalErrorMessage: (e as Error)?.message\n })\n );\n }\n });\n }\n\n async get<T>(key: ProjectNamespaceKeyFieldValue): Promise<T | undefined> {\n const db = await this.openDbPromise;\n const transaction = db.transaction([APP_NAMESPACE_STORE], 'readonly');\n return this.getWithTransaction<T>(key, transaction);\n }\n\n async set<T>(key: ProjectNamespaceKeyFieldValue, value: T): Promise<void> {\n const db = await this.openDbPromise;\n const transaction = db.transaction([APP_NAMESPACE_STORE], 'readwrite');\n return this.setWithTransaction<T>(key, value, transaction);\n }\n\n async delete(key: ProjectNamespaceKeyFieldValue): Promise<void> {\n const db = await this.openDbPromise;\n return new Promise((resolve, reject) => {\n const transaction = db.transaction([APP_NAMESPACE_STORE], 'readwrite');\n const objectStore = transaction.objectStore(APP_NAMESPACE_STORE);\n const compositeKey = this.createCompositeKey(key);\n try {\n const request = objectStore.delete(compositeKey);\n request.onerror = (event: Event) => {\n reject(toFirebaseError(event, ErrorCode.STORAGE_DELETE));\n };\n request.onsuccess = () => {\n resolve();\n };\n } catch (e) {\n reject(\n ERROR_FACTORY.create(ErrorCode.STORAGE_DELETE, {\n originalErrorMessage: (e as Error)?.message\n })\n );\n }\n });\n }\n\n // Facilitates composite key functionality (which is unsupported in IE).\n createCompositeKey(key: ProjectNamespaceKeyFieldValue): string {\n return [this.appId, this.appName, this.namespace, key].join();\n }\n}\n\nexport class InMemoryStorage extends Storage {\n private storage: { [key: string]: unknown } = {};\n\n async get<T>(key: ProjectNamespaceKeyFieldValue): Promise<T> {\n return Promise.resolve(this.storage[key] as T);\n }\n\n async set<T>(key: ProjectNamespaceKeyFieldValue, value: T): Promise<void> {\n this.storage[key] = value;\n return Promise.resolve(undefined);\n }\n\n async delete(key: ProjectNamespaceKeyFieldValue): Promise<void> {\n this.storage[key] = undefined;\n return Promise.resolve();\n }\n\n async setCustomSignals(customSignals: CustomSignals): Promise<CustomSignals> {\n const storedSignals = (this.storage['custom_signals'] ||\n {}) as CustomSignals;\n this.storage['custom_signals'] = mergeCustomSignals(\n customSignals,\n storedSignals\n );\n return Promise.resolve(this.storage['custom_signals'] as CustomSignals);\n }\n}\n\nfunction mergeCustomSignals(\n customSignals: CustomSignals,\n storedSignals: CustomSignals\n): CustomSignals {\n const combinedSignals = {\n ...storedSignals,\n ...customSignals\n };\n\n // Filter out key-value assignments with null values since they are signals being unset\n const updatedSignals = Object.fromEntries(\n Object.entries(combinedSignals)\n .filter(([_, v]) => v !== null)\n .map(([k, v]) => {\n // Stringify numbers to store a map of string keys and values which can be sent\n // as-is in a fetch call.\n if (typeof v === 'number') {\n return [k, v.toString()];\n }\n return [k, v];\n })\n );\n\n // Throw an error if the number of custom signals to be stored exceeds the limit\n if (\n Object.keys(updatedSignals).length > RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS\n ) {\n throw ERROR_FACTORY.create(ErrorCode.CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS, {\n maxSignals: RC_CUSTOM_SIGNAL_MAX_ALLOWED_SIGNALS\n });\n }\n return updatedSignals;\n}\n","/**\n * @license\n * Copyright 2019 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FetchStatus, CustomSignals } from '@firebase/remote-config-types';\nimport { FirebaseRemoteConfigObject } from '../public_types';\nimport { Storage } from './storage';\n\n/**\n * A memory cache layer over storage to support the SDK's synchronous read requirements.\n */\nexport class StorageCache {\n constructor(private readonly storage: Storage) {}\n\n /**\n * Memory caches.\n */\n private lastFetchStatus?: FetchStatus;\n private lastSuccessfulFetchTimestampMillis?: number;\n private activeConfig?: FirebaseRemoteConfigObject;\n private customSignals?: CustomSignals;\n\n /**\n * Memory-only getters\n */\n getLastFetchStatus(): FetchStatus | undefined {\n return this.lastFetchStatus;\n }\n\n getLastSuccessfulFetchTimestampMillis(): number | undefined {\n return this.lastSuccessfulFetchTimestampMillis;\n }\n\n getActiveConfig(): FirebaseRemoteConfigObject | undefined {\n return this.activeConfig;\n }\n\n getCustomSignals(): CustomSignals | undefined {\n return this.customSignals;\n }\n\n /**\n * Read-ahead getter\n */\n async loadFromStorage(): Promise<void> {\n const lastFetchStatusPromise = this.storage.getLastFetchStatus();\n const lastSuccessfulFetchTimestampMillisPromise =\n this.storage.getLastSuccessfulFetchTimestampMillis();\n const activeConfigPromise = this.storage.getActiveConfig();\n const customSignalsPromise = this.storage.getCustomSignals();\n\n // Note:\n // 1. we consistently check for undefined to avoid clobbering defined values\n // in memory\n // 2. we defer awaiting to improve readability, as opposed to destructuring\n // a Promise.all result, for example\n\n const lastFetchStatus = await lastFetchStatusPromise;\n if (lastFetchStatus) {\n this.lastFetchStatus = lastFetchStatus;\n }\n\n const lastSuccessfulFetchTimestampMillis =\n await lastSuccessfulFetchTimestampMillisPromise;\n if (lastSuccessfulFetchTimestampMillis) {\n this.lastSuccessfulFetchTimestampMillis =\n lastSuccessfulFetchTimestampMillis;\n }\n\n const activeConfig = await activeConfigPromise;\n if (activeConfig) {\n this.activeConfig = activeConfig;\n }\n\n const customSignals = await customSignalsPromise;\n if (customSignals) {\n this.customSignals = customSignals;\n }\n }\n\n /**\n * Write-through setters\n */\n setLastFetchStatus(status: FetchStatus): Promise<void> {\n this.lastFetchStatus = status;\n return this.storage.setLastFetchStatus(status);\n }\n\n setLastSuccessfulFetchTimestampMillis(\n timestampMillis: number\n ): Promise<void> {\n this.lastSuccessfulFetchTimestampMillis = timestampMillis;\n return this.storage.setLastSuccessfulFetchTimestampMillis(timestampMillis);\n }\n\n setActiveConfig(activeConfig: FirebaseRemoteConfigObject): Promise<void> {\n this.activeConfig = activeConfig;\n return this.storage.setActiveConfig(activeConfig);\n }\n\n async setCustomSignals(customSignals: CustomSignals): Promise<void> {\n this.customSignals = await this.storage.setCustomSignals(customSignals);\n }\n}\n","/**\n * @license\n * Copyright 2025 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { assert } from '@firebase/util';\n\n// TODO: Consolidate the Visibility monitoring API code into a shared utility function in firebase/util to be used by both packages/database and packages/remote-config.\n/**\n * Base class to be used if you want to emit events. Call the constructor with\n * the set of allowed event names.\n */\nexport abstract class EventEmitter {\n private listeners_: {\n [eventType: string]: Array<{\n callback(...args: unknown[]): void;\n context: unknown;\n }>;\n } = {};\n\n constructor(private allowedEvents_: string[]) {\n assert(\n Array.isArray(allowedEvents_) && allowedEvents_.length > 0,\n 'Requires a non-empty array'\n );\n }\n\n /**\n * To be overridden by derived classes in order to fire an initial event when\n * somebody subscribes for data.\n *\n * @returns {Array.<*>} Array of parameters to trigger initial event with.\n */\n abstract getInitialEvent(eventType: string): unknown[];\n\n /**\n * To be called by derived classes to trigger events.\n */\n protected trigger(eventType: string, ...varArgs: unknown[]): void {\n if (Array.isArray(this.listeners_[eventType])) {\n // Clone the list, since callbacks could add/remove listeners.\n const listeners = [...this.listeners_[eventType]];\n\n for (let i = 0; i < listeners.length; i++) {\n listeners[i].callback.apply(listeners[i].context, varArgs);\n }\n }\n }\n\n on(\n eventType: string,\n callback: (a: unknown) => void,\n context: unknown\n ): void {\n this.validateEventType_(eventType);\n this.listeners_[eventType] = this.listeners_[eventType] || [];\n this.listeners_[eventType].push({ callback, context });\n\n const eventData = this.getInitialEvent(eventType);\n if (eventData) {\n //@ts-ignore\n callback.apply(context, eventData);\n }\n }\n\n off(\n eventType: string,\n callback: (a: unknown) => void,\n context: unknown\n ): void {\n this.validateEventType_(eventType);\n const listeners = this.listeners_[eventType] || [];\n for (let i = 0; i < listeners.length; i++) {\n if (\n listeners[i].callback === callback &&\n (!context || context === listeners[i].context)\n ) {\n listeners.splice(i, 1);\n return;\n }\n }\n }\n\n private validateEventType_(eventType: string): void {\n assert(\n this.allowedEvents_.find(et => {\n return et === eventType;\n }),\n 'Unknown event: ' + eventType\n );\n }\n}\n","/**\n * @license\n * Copyright 2025 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { assert } from '@firebase/util';\n\nimport { EventEmitter } from './eventEmitter';\n\ndeclare const document: Document;\n\n// TODO: Consolidate the Visibility monitoring API code into a shared utility function in firebase/util to be used by both packages/database and packages/remote-config.\nexport class VisibilityMonitor extends EventEmitter {\n private visible_: boolean;\n\n static getInstance(): VisibilityMonitor {\n return new VisibilityMonitor();\n }\n\n constructor() {\n super(['visible']);\n let hidden: string;\n let visibilityChange: string;\n if (\n typeof document !== 'undefined' &&\n typeof document.addEventListener !== 'undefined'\n ) {\n if (typeof document['hidden'] !== 'undefined') {\n // Opera 12.10 and Firefox 18 and later support\n visibilityChange = 'visibilitychange';\n hidden = 'hidden';\n } // @ts-ignore\n else if (typeof document['mozHidden'] !== 'undefined') {\n visibilityChange = 'mozvisibilitychange';\n hidden = 'mozHidden';\n } // @ts-ignore\n else if (typeof document['msHidden'] !== 'undefined') {\n visibilityChange = 'msvisibilitychange';\n hidden = 'msHidden';\n } // @ts-ignore\n else if (typeof document['webkitHidden'] !== 'undefined') {\n visibilityChange = 'webkitvisibilitychange';\n hidden = 'webkitHidden';\n }\n }\n\n // Initially, we always assume we are visible. This ensures that in browsers\n // without page visibility support or in cases where we are never visible\n // (e.g. chrome extension), we act as if we are visible, i.e. don't delay\n // reconnects\n this.visible_ = true;\n\n // @ts-ignore\n if (visibilityChange) {\n document.addEventListener(\n visibilityChange,\n () => {\n // @ts-ignore\n const visible = !document[hidden];\n if (visible !== this.visible_) {\n this.visible_ = visible;\n this.trigger('visible', visible);\n }\n },\n false\n );\n }\n }\n\n getInitialEvent(eventType: string): boolean[] {\n assert(eventType === 'visible', 'Unknown event type: ' + eventType);\n return [this.visible_];\n }\n}\n","/**\n * @license\n * Copyright 2025 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { _FirebaseInstallationsInternal } from '@firebase/installations';\nimport { Logger } from '@firebase/logger';\nimport {\n ConfigUpdate,\n ConfigUpdateObserver,\n FetchResponse,\n FirebaseRemoteConfigObject\n} from '../public_types';\nimport { calculateBackoffMillis, FirebaseError } from '@firebase/util';\nimport { ERROR_FACTORY, ErrorCode } from '../errors';\nimport { Storage } from '../storage/storage';\nimport { VisibilityMonitor } from './visibility_monitor';\nimport { StorageCache } from '../storage/storage_cache';\nimport {\n FetchRequest,\n RemoteConfigAbortSignal\n} from './remote_config_fetch_client';\nimport { CachingClient } from './caching_client';\n\nconst API_KEY_HEADER = 'X-Goog-Api-Key';\nconst INSTALLATIONS_AUTH_TOKEN_HEADER = 'X-Goog-Firebase-Installations-Auth';\nconst ORIGINAL_RETRIES = 8;\nconst MAXIMUM_FETCH_ATTEMPTS = 3;\nconst NO_BACKOFF_TIME_IN_MILLIS = -1;\nconst NO_FAILED_REALTIME_STREAMS = 0;\nconst REALTIME_DISABLED_KEY = 'featureDisabled';\nconst REALTIME_RETRY_INTERVAL = 'retryIntervalSeconds';\nconst TEMPLATE_VERSION_KEY = 'latestTemplateVersionNumber';\n\nexport class RealtimeHandler {\n constructor(\n private readonly firebaseInstallations: _FirebaseInstallationsInternal,\n private readonly storage: Storage,\n private readonly sdkVersion: string,\n private readonly namespace: string,\n private readonly projectId: string,\n private readonly apiKey: string,\n private readonly appId: string,\n private readonly logger: Logger,\n private readonly storageCache: StorageCache,\n private readonly cachingClient: CachingClient\n ) {\n void this.setRetriesRemaining();\n void VisibilityMonitor.getInstance().on(\n 'visible',\n this.onVisibilityChange,\n this\n );\n }\n\n private observers: Set<ConfigUpdateObserver> =\n new Set<ConfigUpdateObserver>();\n private isConnectionActive: boolean = false;\n private isRealtimeDisabled: boolean = false;\n private controller?: AbortController;\n private reader: ReadableStreamDefaultReader<Uint8Array> | undefined;\n private httpRetriesRemaining: number = ORIGINAL_RETRIES;\n private isInBackground: boolean = false;\n private readonly decoder = new TextDecoder('utf-8');\n private isClosingConnection: boolean = false;\n\n private async setRetriesRemaining(): Promise<void> {\n // Retrieve number of remaining retries from last session. The minimum retry count being one.\n const metadata = await this.storage.getRealtimeBackoffMetadata();\n const numFailedStreams = metadata?.numFailedStreams || 0;\n this.httpRetriesRemaining = Math.max(\n ORIGINAL_RETRIES - numFailedStreams,\n 1\n );\n }\n\n private propagateError = (e: FirebaseError): void =>\n this.observers.forEach(o => o.error?.(e));\n\n /**\n * Increment the number of failed stream attempts, increase the backoff duration, set the backoff\n * end time to \"backoff duration\" after `lastFailedStreamTime` and persist the new\n * values to storage metadata.\n */\n private async updateBackoffMetadataWithLastFailedStreamConnectionTime(\n lastFailedStreamTime: Date\n ): Promise<void> {\n const numFailedStreams =\n ((await this.storage.getRealtimeBackoffMetadata())?.numFailedStreams ||\n 0) + 1;\n const backoffMillis = calculateBackoffMillis(numFailedStreams, 60000, 2);\n await this.storage.setRealtimeBackoffMetadata({\n backoffEndTimeMillis: new Date(\n lastFailedStreamTime.getTime() + backoffMillis\n ),\n numFailedStreams\n });\n }\n\n /**\n * Increase the backoff duration with a new end time based on Retry Interval.\n */\n private async updateBackoffMetadataWithRetryInterval(\n retryIntervalSeconds: number\n ): Promise<void> {\n const currentTime = Date.now();\n const backoffDurationInMillis = retryIntervalSeconds * 1000;\n const backoffEndTime = new Date(currentTime + backoffDurationInMillis);\n const numFailedStreams = 0;\n await this.storage.setRealtimeBackoffMetadata({\n backoffEndTimeMillis: backoffEndTime,\n numFailedStreams\n });\n await this.retryHttpConnectionWhenBackoffEnds();\n }\n\n /**\n * HTTP status code that the Realtime client should retry on.\n */\n private isStatusCodeRetryable = (statusCode?: number): boolean => {\n const retryableStatusCodes = [\n 408, // Request Timeout\n 429, // Too Many Requests\n 502, // Bad Gateway\n 503, // Service Unavailable\n 504 // Gateway Timeout\n ];\n return !statusCode || retryableStatusCodes.includes(statusCode);\n };\n\n /**\n * Closes the realtime HTTP connection.\n * Note: This method is designed to be called only once at a time.\n * If a call is already in progress, subsequent calls will be ignored.\n */\n private async closeRealtimeHttpConnection(): Promise<void> {\n if (this.isClosingConnection) {\n return;\n }\n this.isClosingConnection = true;\n\n try {\n if (this.reader) {\n await this.reader.cancel();\n }\n } catch (e) {\n // The network connection was lost, so cancel() failed.\n // This is expected in a disconnected state, so we can safely ignore the error.\n this.logger.debug('Failed to cancel the reader, connection was lost.');\n } finally {\n this.reader = undefined;\n }\n\n if (this.controller) {\n await this.controller.abort();\n this.controller = undefined;\n }\n\n this.isClosingConnection = false;\n }\n\n private async resetRealtimeBackoff(): Promise<void> {\n await this.storage.setRealtimeBackoffMetadata({\n backoffEndTimeMillis: new Date(-1),\n numFailedStreams: 0\n });\n }\n\n private resetRetryCount(): void {\n this.httpRetriesRemaining = ORIGINAL_RETRIES;\n }\n\n /**\n * Assembles the request headers and body and executes the fetch request to\n * establish the real-time streaming connection. This is the \"worker\" method\n * that performs the actual network communication.\n */\n private async establishRealtimeConnection(\n url: URL,\n installationId: string,\n installationTokenResult: string,\n signal: AbortSignal\n ): Promise<Response> {\n const eTagValue = await this.storage.getActiveConfigEtag();\n const lastKnownVersionNumber =\n await this.storage.getActiveConfigTemplateVersion();\n\n const headers = {\n [API_KEY_HEADER]: this.apiKey,\n [INSTALLATIONS_AUTH_TOKEN_HEADER]: installationTokenResult,\n 'Content-Type': 'application/json',\n 'Accept': 'application/json',\n 'If-None-Match': eTagValue || '*',\n 'Content-Encoding': 'gzip'\n };\n\n const requestBody = {\n project: this.projectId,\n namespace: this.namespace,\n lastKnownVersionNumber,\n appId: this.appId,\n sdkVersion: this.sdkVersion,\n appInstanceId: installationId\n };\n\n const response = await fetch(url, {\n method: 'POST',\n headers,\n body: JSON.stringify(requestBody),\n signal\n });\n return response;\n }\n\n private getRealtimeUrl(): URL {\n const urlBase =\n window.FIREBASE_REMOTE_CONFIG_URL_BASE ||\n 'https://firebaseremoteconfigrealtime.googleapis.com';\n\n const urlString = `${urlBase}/v1/projects/${this.projectId}/namespaces/${this.namespace}:streamFetchInvalidations?key=${this.apiKey}`;\n return new URL(urlString);\n }\n\n private async createRealtimeConnection(): Promise<Response> {\n const [installationId, installationTokenResult] = await Promise.all([\n this.firebaseInstallations.getId(),\n this.firebaseInstallations.getToken(false)\n ]);\n this.controller = new AbortController();\n const url = this.getRealtimeUrl();\n const realtimeConnection = await this.establishRealtimeConnection(\n url,\n installationId,\n installationTokenResult,\n this.controller.signal\n );\n return realtimeConnection;\n }\n\n /**\n * Retries HTTP stream connection asyncly in random time intervals.\n */\n private async retryHttpConnectionWhenBackoffEnds(): Promise<void> {\n let backoffMetadata = await this.storage.getRealtimeBackoffMetadata();\n if (!backoffMetadata) {\n backoffMetadata = {\n backoffEndTimeMillis: new Date(NO_BACKOFF_TIME_IN_MILLIS),\n numFailedStreams: NO_FAILED_REALTIME_STREAMS\n };\n }\n const backoffEndTime = new Date(\n backoffMetadata.backoffEndTimeMillis\n ).getTime();\n const currentTime = Date.now();\n const retryMillis = Math.max(0, backoffEndTime - currentTime);\n await this.makeRealtimeHttpConnection(retryMillis);\n }\n\n private setIsHttpConnectionRunning(connectionRunning: boolean): void {\n this.isConnectionActive = connectionRunning;\n }\n\n /**\n * Combines the check and set operations to prevent multiple asynchronous\n * calls from redundantly starting an HTTP connection. This ensures that\n * only one attempt is made at a time.\n */\n private checkAndSetHttpConnectionFlagIfNotRunning(): boolean {\n const canMakeConnection = this.canEstablishStreamConnection();\n if (canMakeConnection) {\n this.setIsHttpConnectionRunning(true);\n }\n return canMakeConnection;\n }\n\n private fetchResponseIsUpToDate(\n fetchResponse: FetchResponse,\n lastKnownVersion: number\n ): boolean {\n // If there is a config, make sure its version is >= the last known version.\n if (fetchResponse.config != null && fetchResponse.templateVersion) {\n return fetchResponse.templateVersion >= lastKnownVersion;\n }\n // If there isn't a config, return true if the fetch was successful and backend had no update.\n // Else, it returned an out of date config.\n return this.storageCache.getLastFetchStatus() === 'success';\n }\n\n private parseAndValidateConfigUpdateMessage(message: string): string {\n const left = message.indexOf('{');\n const right = message.indexOf('}', left);\n\n if (left < 0 || right < 0) {\n return '';\n }\n return left >= right ? '' : message.substring(left, right + 1);\n }\n\n private isEventListenersEmpty(): boolean {\n return this.observers.size === 0;\n }\n\n private getRandomInt(max: number): number {\n return Math.floor(Math.random() * max);\n }\n\n private executeAllListenerCallbacks(configUpdate: ConfigUpdate): void {\n this.observers.forEach(observer => observer.next(configUpdate));\n }\n\n /**\n * Compares two configuration objects and returns a set of keys that have changed.\n * A key is considered changed if it's new, removed, or has a different value.\n */\n private getChangedParams(\n newConfig: FirebaseRemoteConfigObject,\n oldConfig: FirebaseRemoteConfigObject\n ): Set<string> {\n const changedKeys = new Set<string>();\n const newKeys = new Set(Object.keys(newConfig || {}));\n const oldKeys = new Set(Object.keys(oldConfig || {}));\n\n for (const key of newKeys) {\n if (!oldKeys.has(key) || newConfig[key] !== oldConfig[key]) {\n changedKeys.add(key);\n }\n }\n\n for (const key of oldKeys) {\n if (!newKeys.has(key)) {\n changedKeys.add(key);\n }\n }\n\n return changedKeys;\n }\n\n private async fetchLatestConfig(\n remainingAttempts: number,\n targetVersion: number\n ): Promise<void> {\n const remainingAttemptsAfterFetch = remainingAttempts - 1;\n const currentAttempt = MAXIMUM_FETCH_ATTEMPTS - remainingAttemptsAfterFetch;\n const customSignals = this.storageCache.getCustomSignals();\n if (customSignals) {\n this.logger.debug(\n `Fetching config with custom signals: ${JSON.stringify(customSignals)}`\n );\n }\n const abortSignal = new RemoteConfigAbortSignal();\n try {\n const fetchRequest: FetchRequest = {\n cacheMaxAgeMillis: 0,\n signal: abortSignal,\n customSignals,\n fetchType: 'REALTIME',\n fetchAttempt: currentAttempt\n };\n\n const fetchResponse: FetchResponse = await this.cachingClient.fetch(\n fetchRequest\n );\n let activatedConfigs = await this.storage.getActiveConfig();\n\n if (!this.fetchResponseIsUpToDate(fetchResponse, targetVersion)) {\n this.logger.debug(\n \"Fetched template version is the same as SDK's current version.\" +\n ' Retrying fetch.'\n );\n // Continue fetching until template version number is greater than current.\n await this.autoFetch(remainingAttemptsAfterFetch, targetVersion);\n return;\n }\n\n if (fetchResponse.config == null) {\n this.logger.debug(\n 'The fetch succeeded, but the backend had no updates.'\n );\n return;\n }\n\n if (activatedConfigs == null) {\n activatedConfigs = {};\n }\n\n const updatedKeys = this.getChangedParams(\n fetchResponse.config,\n activatedConfigs\n );\n\n if (updatedKeys.size === 0) {\n this.logger.debug('Config was fetched, but no params changed.');\n return;\n }\n\n const configUpdate: ConfigUpdate = {\n getUpdatedKeys(): Set<string> {\n return new Set(updatedKeys);\n }\n };\n this.executeAllListenerCallbacks(configUpdate);\n } catch (e: unknown) {\n const errorMessage = e instanceof Error ? e.message : String(e);\n const error = ERROR_FACTORY.create(ErrorCode.CONFIG_UPDATE_NOT_FETCHED, {\n originalErrorMessage: `Failed to auto-fetch config update: ${errorMessage}`\n });\n this.propagateError(error);\n }\n }\n\n private async autoFetch(\n remainingAttempts: number,\n targetVersion: number\n ): Promise<void> {\n if (remainingAttempts === 0) {\n const error = ERROR_FACTORY.create(ErrorCode.CONFIG_UPDATE_NOT_FETCHED, {\n originalErrorMessage:\n 'Unable to fetch the latest version of the template.'\n });\n this.propagateError(error);\n return;\n }\n\n const timeTillFetchSeconds = this.getRandomInt(4);\n const timeTillFetchInMiliseconds = timeTillFetchSeconds * 1000;\n\n await new Promise(resolve =>\n setTimeout(resolve, timeTillFetchInMiliseconds)\n );\n await this.fetchLatestConfig(remainingAttempts, targetVersion);\n }\n\n /**\n * Processes a stream of real-time messages for configuration updates.\n * This method reassembles fragmented messages, validates and parses the JSON,\n * and automatically fetches a new config if a newer template version is available.\n * It also handles server-specified retry intervals and propagates errors for\n * invalid messages or when real-time updates are disabled.\n */\n private async handleNotifications(\n reader: ReadableStreamDefaultReader<Uint8Array>\n ): Promise<void> {\n let partialConfigUpdateMessage: string;\n let currentConfigUpdateMessage = '';\n\n while (true) {\n const { done, value } = await reader.read();\n if (done) {\n break;\n }\n\n partialConfigUpdateMessage = this.decoder.decode(value, { stream: true });\n currentConfigUpdateMessage += partialConfigUpdateMessage;\n\n if (partialConfigUpdateMessage.includes('}')) {\n currentConfigUpdateMessage = this.parseAndValidateConfigUpdateMessage(\n currentConfigUpdateMessage\n );\n\n if (currentConfigUpdateMessage.length === 0) {\n continue;\n }\n\n try {\n const jsonObject = JSON.parse(currentConfigUpdateMessage);\n\n if (this.isEventListenersEmpty()) {\n break;\n }\n\n if (\n REALTIME_DISABLED_KEY in jsonObject &&\n jsonObject[REALTIME_DISABLED_KEY] === true\n ) {\n const error = ERROR_FACTORY.create(\n ErrorCode.CONFIG_UPDATE_UNAVAILABLE,\n {\n originalErrorMessage:\n 'The server is temporarily unavailable. Try again in a few minutes.'\n }\n );\n this.propagateError(error);\n break;\n }\n\n if (TEMPLATE_VERSION_KEY in jsonObject) {\n const oldTemplateVersion =\n await this.storage.getActiveConfigTemplateVersion();\n const targetTemplateVersion = Number(\n jsonObject[TEMPLATE_VERSION_KEY]\n );\n if (\n oldTemplateVersion &&\n targetTemplateVersion > oldTemplateVersion\n ) {\n await this.autoFetch(\n MAXIMUM_FETCH_ATTEMPTS,\n targetTemplateVersion\n );\n }\n }\n\n // This field in the response indicates that the realtime request should retry after the\n // specified interval to establish a long-lived connection. This interval extends the\n // backoff duration without affecting the number of retries, so it will not enter an\n // exponential backoff state.\n if (REALTIME_RETRY_INTERVAL in jsonObject) {\n const retryIntervalSeconds = Number(\n jsonObject[REALTIME_RETRY_INTERVAL]\n );\n await this.updateBackoffMetadataWithRetryInterval(\n retryIntervalSeconds\n );\n }\n } catch (e: unknown) {\n this.logger.debug('Unable to parse latest config update message.', e);\n const errorMessage = e instanceof Error ? e.message : String(e);\n this.propagateError(\n ERROR_FACTORY.create(ErrorCode.CONFIG_UPDATE_MESSAGE_INVALID, {\n originalErrorMessage: errorMessage\n })\n );\n }\n currentConfigUpdateMessage = '';\n }\n }\n }\n\n private async listenForNotifications(\n reader: ReadableStreamDefaultReader\n ): Promise<void> {\n try {\n await this.handleNotifications(reader);\n } catch (e) {\n // If the real-time connection is at an unexpected lifecycle state when the app is\n // backgrounded, it's expected closing the connection will throw an exception.\n if (!this.isInBackground) {\n // Otherwise, the real-time server connection was closed due to a transient issue.\n this.logger.debug(\n 'Real-time connection was closed due to an exception.'\n );\n }\n }\n }\n\n /**\n * Open the real-time connection, begin listening for updates, and auto-fetch when an update is\n * received.\n *\n * If the connection is successful, this method will block on its thread while it reads the\n * chunk-encoded HTTP body. When the connection closes, it attempts to reestablish the stream.\n */\n private async prepareAndBeginRealtimeHttpStream(): Promise<void> {\n if (!this.checkAndSetHttpConnectionFlagIfNotRunning()) {\n return;\n }\n\n let backoffMetadata = await this.storage.getRealtimeBackoffMetadata();\n if (!backoffMetadata) {\n backoffMetadata = {\n backoffEndTimeMillis: new Date(NO_BACKOFF_TIME_IN_MILLIS),\n numFailedStreams: NO_FAILED_REALTIME_STREAMS\n };\n }\n const backoffEndTime = backoffMetadata.backoffEndTimeMillis.getTime();\n if (Date.now() < backoffEndTime) {\n await this.retryHttpConnectionWhenBackoffEnds();\n return;\n }\n\n let response: Response | undefined;\n let responseCode: number | undefined;\n try {\n response = await this.createRealtimeConnection();\n responseCode = response.status;\n if (response.ok && response.body) {\n this.resetRetryCount();\n await this.resetRealtimeBackoff();\n const reader = response.body.getReader();\n this.reader = reader;\n // Start listening for realtime notifications.\n await this.listenForNotifications(reader);\n }\n } catch (error) {\n if (this.isInBackground) {\n // It's possible the app was backgrounded while the connection was open, which\n // threw an exception trying to read the response. No real error here, so treat\n // this as a success, even if we haven't read a 200 response code yet.\n this.resetRetryCount();\n } else {\n //there might have been a transient error so the client will retry the connection.\n this.logger.debug(\n 'Exception connecting to real-time RC backend. Retrying the connection...:',\n error\n );\n }\n } finally {\n // Close HTTP connection and associated streams.\n await this.closeRealtimeHttpConnection();\n this.setIsHttpConnectionRunning(false);\n\n // Update backoff metadata if the connection failed in the foreground.\n const connectionFailed =\n !this.isInBackground &&\n (responseCode === undefined ||\n this.isStatusCodeRetryable(responseCode));\n\n if (connectionFailed) {\n await this.updateBackoffMetadataWithLastFailedStreamConnectionTime(\n new Date()\n );\n }\n // If responseCode is null then no connection was made to server and the SDK should still retry.\n if (connectionFailed || response?.ok) {\n await this.retryHttpConnectionWhenBackoffEnds();\n } else {\n const errorMessage = `Unable to connect to the server. HTTP status code: ${responseCode}`;\n const firebaseError = ERROR_FACTORY.create(\n ErrorCode.CONFIG_UPDATE_STREAM_ERROR,\n {\n originalErrorMessage: errorMessage\n }\n );\n this.propagateError(firebaseError);\n }\n }\n }\n\n /**\n * Checks whether connection can be made or not based on some conditions\n * @returns booelean\n */\n private canEstablishStreamConnection(): boolean {\n const hasActiveListeners = this.observers.size > 0;\n const isNotDisabled = !this.isRealtimeDisabled;\n const isNoConnectionActive = !this.isConnectionActive;\n const inForeground = !this.isInBackground;\n return (\n hasActiveListeners &&\n isNotDisabled &&\n isNoConnectionActive &&\n inForeground\n );\n }\n\n private async makeRealtimeHttpConnection(delayMillis: number): Promise<void> {\n if (!this.canEstablishStreamConnection()) {\n return;\n }\n if (this.httpRetriesRemaining > 0) {\n this.httpRetriesRemaining--;\n await new Promise(resolve => setTimeout(resolve, delayMillis));\n void this.prepareAndBeginRealtimeHttpStream();\n } else if (!this.isInBackground) {\n const error = ERROR_FACTORY.create(ErrorCode.CONFIG_UPDATE_STREAM_ERROR, {\n originalErrorMessage:\n 'Unable to connect to the server. Check your connection and try again.'\n });\n this.propagateError(error);\n }\n }\n\n private async beginRealtime(): Promise<void> {\n if (this.observers.size > 0) {\n await this.makeRealtimeHttpConnection(0);\n }\n }\n\n /**\n * Adds an observer to the realtime updates.\n * @param observer The observer to add.\n */\n addObserver(observer: ConfigUpdateObserver): void {\n this.observers.add(observer);\n void this.beginRealtime();\n }\n\n /**\n * Removes an observer from the realtime updates.\n * @param observer The observer to remove.\n */\n removeObserver(observer: ConfigUpdateObserver): void {\n if (this.observers.has(observer)) {\n this.observers.delete(observer);\n }\n }\n\n /**\n * Handles changes to the application's visibility state, managing the real-time connection.\n *\n * When the application is moved to the background, this method closes the existing\n * real-time connection to save resources. When the application returns to the\n * foreground, it attempts to re-establish the connection.\n */\n private async onVisibilityChange(visible: unknown): Promise<void> {\n this.isInBackground = !visible;\n if (!visible) {\n await this.closeRealtimeHttpConnection();\n } else if (visible) {\n await this.beginRealtime();\n }\n }\n}\n","/**\n * @license\n * Copyright 2020 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { RemoteConfig } from './public_types';\nimport { activate, fetchConfig } from './api';\nimport {\n getModularInstance,\n isIndexedDBAvailable,\n validateIndexedDBOpenable\n} from '@firebase/util';\n\n// This API is put in a separate file, so we can stub fetchConfig and activate in tests.\n// It's not possible to stub standalone functions from the same module.\n/**\n *\n * Performs fetch and activate operations, as a convenience.\n *\n * @param remoteConfig - The {@link RemoteConfig} instance.\n *\n * @returns A `Promise` which resolves to true if the current call activated the fetched configs.\n * If the fetched configs were already activated, the `Promise` will resolve to false.\n *\n * @public\n */\nexport async function fetchAndActivate(\n remoteConfig: RemoteConfig\n): Promise<boolean> {\n remoteConfig = getModularInstance(remoteConfig);\n await fetchConfig(remoteConfig);\n return activate(remoteConfig);\n}\n\n/**\n * This method provides two different checks:\n *\n * 1. Check if IndexedDB exists in the browser environment.\n * 2. Check if the current browser context allows IndexedDB `open()` calls.\n *\n * @returns A `Promise` which resolves to true if a {@link RemoteConfig} instance\n * can be initialized in this environment, or false if it cannot.\n * @public\n */\nexport async function isSupported(): Promise<boolean> {\n if (!isIndexedDBAvailable()) {\n return false;\n }\n\n try {\n const isDBOpenable: boolean = await validateIndexedDBOpenable();\n return isDBOpenable;\n } catch (error) {\n return false;\n }\n}\n","/**\n * @license\n * Copyright 2020 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport {\n _registerComponent,\n registerVersion,\n SDK_VERSION\n} from '@firebase/app';\nimport { isIndexedDBAvailable } from '@firebase/util';\nimport {\n Component,\n ComponentType,\n ComponentContainer\n} from '@firebase/component';\nimport { Logger, LogLevel as FirebaseLogLevel } from '@firebase/logger';\nimport { RemoteConfig, RemoteConfigOptions } from './public_types';\nimport { name as packageName, version } from '../package.json';\nimport { ensureInitialized } from './api';\nimport { CachingClient } from './client/caching_client';\nimport { RestClient } from './client/rest_client';\nimport { RetryingClient } from './client/retrying_client';\nimport { RC_COMPONENT_NAME } from './constants';\nimport { ErrorCode, ERROR_FACTORY } from './errors';\nimport { RemoteConfig as RemoteConfigImpl } from './remote_config';\nimport { IndexedDbStorage, InMemoryStorage } from './storage/storage';\nimport { StorageCache } from './storage/storage_cache';\nimport { RealtimeHandler } from './client/realtime_handler';\n// This needs to be in the same file that calls `getProvider()` on the component\n// or it will get tree-shaken out.\nimport '@firebase/installations';\n\nexport function registerRemoteConfig(): void {\n _registerComponent(\n new Component(\n RC_COMPONENT_NAME,\n remoteConfigFactory,\n ComponentType.PUBLIC\n ).setMultipleInstances(true)\n );\n\n registerVersion(packageName, version);\n // BUILD_TARGET will be replaced by values like esm, cjs, etc during the compilation\n registerVersion(packageName, version, '__BUILD_TARGET__');\n\n function remoteConfigFactory(\n container: ComponentContainer,\n { options }: { options?: RemoteConfigOptions }\n ): RemoteConfig {\n /* Dependencies */\n // getImmediate for FirebaseApp will always succeed\n const app = container.getProvider('app').getImmediate();\n // The following call will always succeed because rc has `import '@firebase/installations'`\n const installations = container\n .getProvider('installations-internal')\n .getImmediate();\n\n // Normalizes optional inputs.\n const { projectId, apiKey, appId } = app.options;\n if (!projectId) {\n throw ERROR_FACTORY.create(ErrorCode.REGISTRATION_PROJECT_ID);\n }\n if (!apiKey) {\n throw ERROR_FACTORY.create(ErrorCode.REGISTRATION_API_KEY);\n }\n if (!appId) {\n throw ERROR_FACTORY.create(ErrorCode.REGISTRATION_APP_ID);\n }\n const namespace = options?.templateId || 'firebase';\n\n const storage = isIndexedDBAvailable()\n ? new IndexedDbStorage(appId, app.name, namespace)\n : new InMemoryStorage();\n const storageCache = new StorageCache(storage);\n\n const logger = new Logger(packageName);\n\n // Sets ERROR as the default log level.\n // See RemoteConfig#setLogLevel for corresponding normalization to ERROR log level.\n logger.logLevel = FirebaseLogLevel.ERROR;\n\n const restClient = new RestClient(\n installations,\n // Uses the JS SDK version, by which the RC package version can be deduced, if necessary.\n SDK_VERSION,\n namespace,\n projectId,\n apiKey,\n appId\n );\n const retryingClient = new RetryingClient(restClient, storage);\n const cachingClient = new CachingClient(\n retryingClient,\n storage,\n storageCache,\n logger\n );\n\n const realtimeHandler = new RealtimeHandler(\n installations,\n storage,\n SDK_VERSION,\n namespace,\n projectId,\n apiKey,\n appId,\n logger,\n storageCache,\n cachingClient\n );\n\n const remoteConfigInstance = new RemoteConfigImpl(\n app,\n cachingClient,\n storageCache,\n storage,\n logger,\n realtimeHandler\n );\n\n // Starts warming cache.\n // eslint-disable-next-line @typescript-eslint/no-floating-promises\n ensureInitialized(remoteConfigInstance);\n\n return remoteConfigInstance;\n }\n}\n","/**\n * The Firebase Remote Config Web SDK.\n * This SDK does not work in a Node.js environment.\n *\n * @packageDocumentation\n */\n\n/**\n * @license\n * Copyright 2020 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { registerRemoteConfig } from './register';\n\n// Facilitates debugging by enabling settings changes without rebuilding asset.\n// Note these debug options are not part of a documented, supported API and can change at any time.\n// Consolidates debug options for easier discovery.\n// Uses transient variables on window to avoid lingering state causing panic.\ndeclare global {\n interface Window {\n 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