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diff --git a/frontend-old/node_modules/@firebase/app-check/dist/index.cjs.js b/frontend-old/node_modules/@firebase/app-check/dist/index.cjs.js
new file mode 100644
index 0000000..340b411
--- /dev/null
+++ b/frontend-old/node_modules/@firebase/app-check/dist/index.cjs.js
@@ -0,0 +1,1704 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+var app = require('@firebase/app');
+var component = require('@firebase/component');
+var util = require('@firebase/util');
+var logger$1 = require('@firebase/logger');
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+const APP_CHECK_STATES = new Map();
+const DEFAULT_STATE = {
+    activated: false,
+    tokenObservers: []
+};
+const DEBUG_STATE = {
+    initialized: false,
+    enabled: false
+};
+/**
+ * Gets a reference to the state object.
+ */
+function getStateReference(app) {
+    return APP_CHECK_STATES.get(app) || { ...DEFAULT_STATE };
+}
+/**
+ * Set once on initialization. The map should hold the same reference to the
+ * same object until this entry is deleted.
+ */
+function setInitialState(app, state) {
+    APP_CHECK_STATES.set(app, state);
+    return APP_CHECK_STATES.get(app);
+}
+function getDebugState() {
+    return DEBUG_STATE;
+}
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+const BASE_ENDPOINT = 'https://content-firebaseappcheck.googleapis.com/v1';
+const EXCHANGE_RECAPTCHA_TOKEN_METHOD = 'exchangeRecaptchaV3Token';
+const EXCHANGE_RECAPTCHA_ENTERPRISE_TOKEN_METHOD = 'exchangeRecaptchaEnterpriseToken';
+const EXCHANGE_DEBUG_TOKEN_METHOD = 'exchangeDebugToken';
+const TOKEN_REFRESH_TIME = {
+    /**
+     * The offset time before token natural expiration to run the refresh.
+     * This is currently 5 minutes.
+     */
+    OFFSET_DURATION: 5 * 60 * 1000,
+    /**
+     * This is the first retrial wait after an error. This is currently
+     * 30 seconds.
+     */
+    RETRIAL_MIN_WAIT: 30 * 1000,
+    /**
+     * This is the maximum retrial wait, currently 16 minutes.
+     */
+    RETRIAL_MAX_WAIT: 16 * 60 * 1000
+};
+/**
+ * One day in millis, for certain error code backoffs.
+ */
+const ONE_DAY = 24 * 60 * 60 * 1000;
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * Port from auth proactiverefresh.js
+ *
+ */
+// TODO: move it to @firebase/util?
+// TODO: allow to config whether refresh should happen in the background
+class Refresher {
+    constructor(operation, retryPolicy, getWaitDuration, lowerBound, upperBound) {
+        this.operation = operation;
+        this.retryPolicy = retryPolicy;
+        this.getWaitDuration = getWaitDuration;
+        this.lowerBound = lowerBound;
+        this.upperBound = upperBound;
+        this.pending = null;
+        this.nextErrorWaitInterval = lowerBound;
+        if (lowerBound > upperBound) {
+            throw new Error('Proactive refresh lower bound greater than upper bound!');
+        }
+    }
+    start() {
+        this.nextErrorWaitInterval = this.lowerBound;
+        this.process(true).catch(() => {
+            /* we don't care about the result */
+        });
+    }
+    stop() {
+        if (this.pending) {
+            this.pending.reject('cancelled');
+            this.pending = null;
+        }
+    }
+    isRunning() {
+        return !!this.pending;
+    }
+    async process(hasSucceeded) {
+        this.stop();
+        try {
+            this.pending = new util.Deferred();
+            this.pending.promise.catch(_e => {
+                /* ignore */
+            });
+            await sleep(this.getNextRun(hasSucceeded));
+            // Why do we resolve a promise, then immediate wait for it?
+            // We do it to make the promise chain cancellable.
+            // We can call stop() which rejects the promise before the following line execute, which makes
+            // the code jump to the catch block.
+            // TODO: unit test this
+            this.pending.resolve();
+            await this.pending.promise;
+            this.pending = new util.Deferred();
+            this.pending.promise.catch(_e => {
+                /* ignore */
+            });
+            await this.operation();
+            this.pending.resolve();
+            await this.pending.promise;
+            this.process(true).catch(() => {
+                /* we don't care about the result */
+            });
+        }
+        catch (error) {
+            if (this.retryPolicy(error)) {
+                this.process(false).catch(() => {
+                    /* we don't care about the result */
+                });
+            }
+            else {
+                this.stop();
+            }
+        }
+    }
+    getNextRun(hasSucceeded) {
+        if (hasSucceeded) {
+            // If last operation succeeded, reset next error wait interval and return
+            // the default wait duration.
+            this.nextErrorWaitInterval = this.lowerBound;
+            // Return typical wait duration interval after a successful operation.
+            return this.getWaitDuration();
+        }
+        else {
+            // Get next error wait interval.
+            const currentErrorWaitInterval = this.nextErrorWaitInterval;
+            // Double interval for next consecutive error.
+            this.nextErrorWaitInterval *= 2;
+            // Make sure next wait interval does not exceed the maximum upper bound.
+            if (this.nextErrorWaitInterval > this.upperBound) {
+                this.nextErrorWaitInterval = this.upperBound;
+            }
+            return currentErrorWaitInterval;
+        }
+    }
+}
+function sleep(ms) {
+    return new Promise(resolve => {
+        setTimeout(resolve, ms);
+    });
+}
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+const ERRORS = {
+    ["already-initialized" /* AppCheckError.ALREADY_INITIALIZED */]: 'You have already called initializeAppCheck() for FirebaseApp {$appName} with ' +
+        'different options. To avoid this error, call initializeAppCheck() with the ' +
+        'same options as when it was originally called. This will return the ' +
+        'already initialized instance.',
+    ["use-before-activation" /* AppCheckError.USE_BEFORE_ACTIVATION */]: 'App Check is being used before initializeAppCheck() is called for FirebaseApp {$appName}. ' +
+        'Call initializeAppCheck() before instantiating other Firebase services.',
+    ["fetch-network-error" /* AppCheckError.FETCH_NETWORK_ERROR */]: 'Fetch failed to connect to a network. Check Internet connection. ' +
+        'Original error: {$originalErrorMessage}.',
+    ["fetch-parse-error" /* AppCheckError.FETCH_PARSE_ERROR */]: 'Fetch client could not parse response.' +
+        ' Original error: {$originalErrorMessage}.',
+    ["fetch-status-error" /* AppCheckError.FETCH_STATUS_ERROR */]: 'Fetch server returned an HTTP error status. HTTP status: {$httpStatus}.',
+    ["storage-open" /* AppCheckError.STORAGE_OPEN */]: 'Error thrown when opening storage. Original error: {$originalErrorMessage}.',
+    ["storage-get" /* AppCheckError.STORAGE_GET */]: 'Error thrown when reading from storage. Original error: {$originalErrorMessage}.',
+    ["storage-set" /* AppCheckError.STORAGE_WRITE */]: 'Error thrown when writing to storage. Original error: {$originalErrorMessage}.',
+    ["recaptcha-error" /* AppCheckError.RECAPTCHA_ERROR */]: 'ReCAPTCHA error.',
+    ["initial-throttle" /* AppCheckError.INITIAL_THROTTLE */]: `{$httpStatus} error. Attempts allowed again after {$time}`,
+    ["throttled" /* AppCheckError.THROTTLED */]: `Requests throttled due to previous {$httpStatus} error. Attempts allowed again after {$time}`
+};
+const ERROR_FACTORY = new util.ErrorFactory('appCheck', 'AppCheck', ERRORS);
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+function getRecaptcha(isEnterprise = false) {
+    if (isEnterprise) {
+        return self.grecaptcha?.enterprise;
+    }
+    return self.grecaptcha;
+}
+function ensureActivated(app) {
+    if (!getStateReference(app).activated) {
+        throw ERROR_FACTORY.create("use-before-activation" /* AppCheckError.USE_BEFORE_ACTIVATION */, {
+            appName: app.name
+        });
+    }
+}
+function getDurationString(durationInMillis) {
+    const totalSeconds = Math.round(durationInMillis / 1000);
+    const days = Math.floor(totalSeconds / (3600 * 24));
+    const hours = Math.floor((totalSeconds - days * 3600 * 24) / 3600);
+    const minutes = Math.floor((totalSeconds - days * 3600 * 24 - hours * 3600) / 60);
+    const seconds = totalSeconds - days * 3600 * 24 - hours * 3600 - minutes * 60;
+    let result = '';
+    if (days) {
+        result += pad(days) + 'd:';
+    }
+    if (hours) {
+        result += pad(hours) + 'h:';
+    }
+    result += pad(minutes) + 'm:' + pad(seconds) + 's';
+    return result;
+}
+function pad(value) {
+    if (value === 0) {
+        return '00';
+    }
+    return value >= 10 ? value.toString() : '0' + value;
+}
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+async function exchangeToken({ url, body }, heartbeatServiceProvider) {
+    const headers = {
+        'Content-Type': 'application/json'
+    };
+    // If heartbeat service exists, add heartbeat header string to the header.
+    const heartbeatService = heartbeatServiceProvider.getImmediate({
+        optional: true
+    });
+    if (heartbeatService) {
+        const heartbeatsHeader = await heartbeatService.getHeartbeatsHeader();
+        if (heartbeatsHeader) {
+            headers['X-Firebase-Client'] = heartbeatsHeader;
+        }
+    }
+    const options = {
+        method: 'POST',
+        body: JSON.stringify(body),
+        headers
+    };
+    let response;
+    try {
+        response = await fetch(url, options);
+    }
+    catch (originalError) {
+        throw ERROR_FACTORY.create("fetch-network-error" /* AppCheckError.FETCH_NETWORK_ERROR */, {
+            originalErrorMessage: originalError?.message
+        });
+    }
+    if (response.status !== 200) {
+        throw ERROR_FACTORY.create("fetch-status-error" /* AppCheckError.FETCH_STATUS_ERROR */, {
+            httpStatus: response.status
+        });
+    }
+    let responseBody;
+    try {
+        // JSON parsing throws SyntaxError if the response body isn't a JSON string.
+        responseBody = await response.json();
+    }
+    catch (originalError) {
+        throw ERROR_FACTORY.create("fetch-parse-error" /* AppCheckError.FETCH_PARSE_ERROR */, {
+            originalErrorMessage: originalError?.message
+        });
+    }
+    // Protobuf duration format.
+    // https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/Duration
+    const match = responseBody.ttl.match(/^([\d.]+)(s)$/);
+    if (!match || !match[2] || isNaN(Number(match[1]))) {
+        throw ERROR_FACTORY.create("fetch-parse-error" /* AppCheckError.FETCH_PARSE_ERROR */, {
+            originalErrorMessage: `ttl field (timeToLive) is not in standard Protobuf Duration ` +
+                `format: ${responseBody.ttl}`
+        });
+    }
+    const timeToLiveAsNumber = Number(match[1]) * 1000;
+    const now = Date.now();
+    return {
+        token: responseBody.token,
+        expireTimeMillis: now + timeToLiveAsNumber,
+        issuedAtTimeMillis: now
+    };
+}
+function getExchangeRecaptchaV3TokenRequest(app, reCAPTCHAToken) {
+    const { projectId, appId, apiKey } = app.options;
+    return {
+        url: `${BASE_ENDPOINT}/projects/${projectId}/apps/${appId}:${EXCHANGE_RECAPTCHA_TOKEN_METHOD}?key=${apiKey}`,
+        body: {
+            'recaptcha_v3_token': reCAPTCHAToken
+        }
+    };
+}
+function getExchangeRecaptchaEnterpriseTokenRequest(app, reCAPTCHAToken) {
+    const { projectId, appId, apiKey } = app.options;
+    return {
+        url: `${BASE_ENDPOINT}/projects/${projectId}/apps/${appId}:${EXCHANGE_RECAPTCHA_ENTERPRISE_TOKEN_METHOD}?key=${apiKey}`,
+        body: {
+            'recaptcha_enterprise_token': reCAPTCHAToken
+        }
+    };
+}
+function getExchangeDebugTokenRequest(app, debugToken) {
+    const { projectId, appId, apiKey } = app.options;
+    return {
+        url: `${BASE_ENDPOINT}/projects/${projectId}/apps/${appId}:${EXCHANGE_DEBUG_TOKEN_METHOD}?key=${apiKey}`,
+        body: {
+            // eslint-disable-next-line
+            debug_token: debugToken
+        }
+    };
+}
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+const DB_NAME = 'firebase-app-check-database';
+const DB_VERSION = 1;
+const STORE_NAME = 'firebase-app-check-store';
+const DEBUG_TOKEN_KEY = 'debug-token';
+let dbPromise = null;
+function getDBPromise() {
+    if (dbPromise) {
+        return dbPromise;
+    }
+    dbPromise = new Promise((resolve, reject) => {
+        try {
+            const request = indexedDB.open(DB_NAME, DB_VERSION);
+            request.onsuccess = event => {
+                resolve(event.target.result);
+            };
+            request.onerror = event => {
+                reject(ERROR_FACTORY.create("storage-open" /* AppCheckError.STORAGE_OPEN */, {
+                    originalErrorMessage: event.target.error?.message
+                }));
+            };
+            request.onupgradeneeded = event => {
+                const db = event.target.result;
+                // We don't use 'break' in this switch statement, the fall-through
+                // behavior is what we want, because if there are multiple versions between
+                // the old version and the current version, we want ALL the migrations
+                // that correspond to those versions to run, not only the last one.
+                // eslint-disable-next-line default-case
+                switch (event.oldVersion) {
+                    case 0:
+                        db.createObjectStore(STORE_NAME, {
+                            keyPath: 'compositeKey'
+                        });
+                }
+            };
+        }
+        catch (e) {
+            reject(ERROR_FACTORY.create("storage-open" /* AppCheckError.STORAGE_OPEN */, {
+                originalErrorMessage: e?.message
+            }));
+        }
+    });
+    return dbPromise;
+}
+function readTokenFromIndexedDB(app) {
+    return read(computeKey(app));
+}
+function writeTokenToIndexedDB(app, token) {
+    return write(computeKey(app), token);
+}
+function writeDebugTokenToIndexedDB(token) {
+    return write(DEBUG_TOKEN_KEY, token);
+}
+function readDebugTokenFromIndexedDB() {
+    return read(DEBUG_TOKEN_KEY);
+}
+async function write(key, value) {
+    const db = await getDBPromise();
+    const transaction = db.transaction(STORE_NAME, 'readwrite');
+    const store = transaction.objectStore(STORE_NAME);
+    const request = store.put({
+        compositeKey: key,
+        value
+    });
+    return new Promise((resolve, reject) => {
+        request.onsuccess = _event => {
+            resolve();
+        };
+        transaction.onerror = event => {
+            reject(ERROR_FACTORY.create("storage-set" /* AppCheckError.STORAGE_WRITE */, {
+                originalErrorMessage: event.target.error?.message
+            }));
+        };
+    });
+}
+async function read(key) {
+    const db = await getDBPromise();
+    const transaction = db.transaction(STORE_NAME, 'readonly');
+    const store = transaction.objectStore(STORE_NAME);
+    const request = store.get(key);
+    return new Promise((resolve, reject) => {
+        request.onsuccess = event => {
+            const result = event.target.result;
+            if (result) {
+                resolve(result.value);
+            }
+            else {
+                resolve(undefined);
+            }
+        };
+        transaction.onerror = event => {
+            reject(ERROR_FACTORY.create("storage-get" /* AppCheckError.STORAGE_GET */, {
+                originalErrorMessage: event.target.error?.message
+            }));
+        };
+    });
+}
+function computeKey(app) {
+    return `${app.options.appId}-${app.name}`;
+}
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+const logger = new logger$1.Logger('@firebase/app-check');
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * Always resolves. In case of an error reading from indexeddb, resolve with undefined
+ */
+async function readTokenFromStorage(app) {
+    if (util.isIndexedDBAvailable()) {
+        let token = undefined;
+        try {
+            token = await readTokenFromIndexedDB(app);
+        }
+        catch (e) {
+            // swallow the error and return undefined
+            logger.warn(`Failed to read token from IndexedDB. Error: ${e}`);
+        }
+        return token;
+    }
+    return undefined;
+}
+/**
+ * Always resolves. In case of an error writing to indexeddb, print a warning and resolve the promise
+ */
+function writeTokenToStorage(app, token) {
+    if (util.isIndexedDBAvailable()) {
+        return writeTokenToIndexedDB(app, token).catch(e => {
+            // swallow the error and resolve the promise
+            logger.warn(`Failed to write token to IndexedDB. Error: ${e}`);
+        });
+    }
+    return Promise.resolve();
+}
+async function readOrCreateDebugTokenFromStorage() {
+    /**
+     * Theoretically race condition can happen if we read, then write in 2 separate transactions.
+     * But it won't happen here, because this function will be called exactly once.
+     */
+    let existingDebugToken = undefined;
+    try {
+        existingDebugToken = await readDebugTokenFromIndexedDB();
+    }
+    catch (_e) {
+        // failed to read from indexeddb. We assume there is no existing debug token, and generate a new one.
+    }
+    if (!existingDebugToken) {
+        // create a new debug token
+        // This function is only available in secure contexts. See https://developer.mozilla.org/en-US/docs/Web/Security/Secure_Contexts
+        const newToken = crypto.randomUUID();
+        // We don't need to block on writing to indexeddb
+        // In case persistence failed, a new debug token will be generated every time the page is refreshed.
+        // It renders the debug token useless because you have to manually register(whitelist) the new token in the firebase console again and again.
+        // If you see this error trying to use debug token, it probably means you are using a browser that doesn't support indexeddb.
+        // You should switch to a different browser that supports indexeddb
+        writeDebugTokenToIndexedDB(newToken).catch(e => logger.warn(`Failed to persist debug token to IndexedDB. Error: ${e}`));
+        return newToken;
+    }
+    else {
+        return existingDebugToken;
+    }
+}
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+function isDebugMode() {
+    const debugState = getDebugState();
+    return debugState.enabled;
+}
+async function getDebugToken() {
+    const state = getDebugState();
+    if (state.enabled && state.token) {
+        return state.token.promise;
+    }
+    else {
+        // should not happen!
+        throw Error(`
+            Can't get debug token in production mode.
+        `);
+    }
+}
+function initializeDebugMode() {
+    const globals = util.getGlobal();
+    const debugState = getDebugState();
+    // Set to true if this function has been called, whether or not
+    // it enabled debug mode.
+    debugState.initialized = true;
+    if (typeof globals.FIREBASE_APPCHECK_DEBUG_TOKEN !== 'string' &&
+        globals.FIREBASE_APPCHECK_DEBUG_TOKEN !== true) {
+        return;
+    }
+    debugState.enabled = true;
+    const deferredToken = new util.Deferred();
+    debugState.token = deferredToken;
+    if (typeof globals.FIREBASE_APPCHECK_DEBUG_TOKEN === 'string') {
+        deferredToken.resolve(globals.FIREBASE_APPCHECK_DEBUG_TOKEN);
+    }
+    else {
+        deferredToken.resolve(readOrCreateDebugTokenFromStorage());
+    }
+}
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Initial hardcoded value agreed upon across platforms for initial launch.
+// Format left open for possible dynamic error values and other fields in the future.
+const defaultTokenErrorData = { error: 'UNKNOWN_ERROR' };
+/**
+ * Stringify and base64 encode token error data.
+ *
+ * @param tokenError Error data, currently hardcoded.
+ */
+function formatDummyToken(tokenErrorData) {
+    return util.base64.encodeString(JSON.stringify(tokenErrorData), 
+    /* webSafe= */ false);
+}
+/**
+ * This function always resolves.
+ * The result will contain an error field if there is any error.
+ * In case there is an error, the token field in the result will be populated with a dummy value
+ */
+async function getToken$2(appCheck, forceRefresh = false, shouldLogErrors = false) {
+    const app = appCheck.app;
+    ensureActivated(app);
+    const state = getStateReference(app);
+    /**
+     * First check if there is a token in memory from a previous `getToken()` call.
+     */
+    let token = state.token;
+    let error = undefined;
+    /**
+     * If an invalid token was found in memory, clear token from
+     * memory and unset the local variable `token`.
+     */
+    if (token && !isValid(token)) {
+        state.token = undefined;
+        token = undefined;
+    }
+    /**
+     * If there is no valid token in memory, try to load token from indexedDB.
+     */
+    if (!token) {
+        // cachedTokenPromise contains the token found in IndexedDB or undefined if not found.
+        const cachedToken = await state.cachedTokenPromise;
+        if (cachedToken) {
+            if (isValid(cachedToken)) {
+                token = cachedToken;
+            }
+            else {
+                // If there was an invalid token in the indexedDB cache, clear it.
+                await writeTokenToStorage(app, undefined);
+            }
+        }
+    }
+    // Return the cached token (from either memory or indexedDB) if it's valid
+    if (!forceRefresh && token && isValid(token)) {
+        return {
+            token: token.token
+        };
+    }
+    // Only set to true if this `getToken()` call is making the actual
+    // REST call to the exchange endpoint, versus waiting for an already
+    // in-flight call (see debug and regular exchange endpoint paths below)
+    let shouldCallListeners = false;
+    /**
+     * DEBUG MODE
+     * If debug mode is set, and there is no cached token, fetch a new App
+     * Check token using the debug token, and return it directly.
+     */
+    if (isDebugMode()) {
+        try {
+            // Avoid making another call to the exchange endpoint if one is in flight.
+            if (!state.exchangeTokenPromise) {
+                state.exchangeTokenPromise = exchangeToken(getExchangeDebugTokenRequest(app, await getDebugToken()), appCheck.heartbeatServiceProvider).finally(() => {
+                    // Clear promise when settled - either resolved or rejected.
+                    state.exchangeTokenPromise = undefined;
+                });
+                shouldCallListeners = true;
+            }
+            const tokenFromDebugExchange = await state.exchangeTokenPromise;
+            // Write debug token to indexedDB.
+            await writeTokenToStorage(app, tokenFromDebugExchange);
+            // Write debug token to state.
+            state.token = tokenFromDebugExchange;
+            return { token: tokenFromDebugExchange.token };
+        }
+        catch (e) {
+            if (e.code === `appCheck/${"throttled" /* AppCheckError.THROTTLED */}` ||
+                e.code ===
+                    `appCheck/${"initial-throttle" /* AppCheckError.INITIAL_THROTTLE */}`) {
+                // Warn if throttled, but do not treat it as an error.
+                logger.warn(e.message);
+            }
+            else if (shouldLogErrors) {
+                logger.error(e);
+            }
+            // Return dummy token and error
+            return makeDummyTokenResult(e);
+        }
+    }
+    /**
+     * There are no valid tokens in memory or indexedDB and we are not in
+     * debug mode.
+     * Request a new token from the exchange endpoint.
+     */
+    try {
+        // Avoid making another call to the exchange endpoint if one is in flight.
+        if (!state.exchangeTokenPromise) {
+            // state.provider is populated in initializeAppCheck()
+            // ensureActivated() at the top of this function checks that
+            // initializeAppCheck() has been called.
+            state.exchangeTokenPromise = state.provider.getToken().finally(() => {
+                // Clear promise when settled - either resolved or rejected.
+                state.exchangeTokenPromise = undefined;
+            });
+            shouldCallListeners = true;
+        }
+        token = await getStateReference(app).exchangeTokenPromise;
+    }
+    catch (e) {
+        if (e.code === `appCheck/${"throttled" /* AppCheckError.THROTTLED */}` ||
+            e.code === `appCheck/${"initial-throttle" /* AppCheckError.INITIAL_THROTTLE */}`) {
+            // Warn if throttled, but do not treat it as an error.
+            logger.warn(e.message);
+        }
+        else if (shouldLogErrors) {
+            logger.error(e);
+        }
+        // Always save error to be added to dummy token.
+        error = e;
+    }
+    let interopTokenResult;
+    if (!token) {
+        // If token is undefined, there must be an error.
+        // Return a dummy token along with the error.
+        interopTokenResult = makeDummyTokenResult(error);
+    }
+    else if (error) {
+        if (isValid(token)) {
+            // It's also possible a valid token exists, but there's also an error.
+            // (Such as if the token is almost expired, tries to refresh, and
+            // the exchange request fails.)
+            // We add a special error property here so that the refresher will
+            // count this as a failed attempt and use the backoff instead of
+            // retrying repeatedly with no delay, but any 3P listeners will not
+            // be hindered in getting the still-valid token.
+            interopTokenResult = {
+                token: token.token,
+                internalError: error
+            };
+        }
+        else {
+            // No invalid tokens should make it to this step. Memory and cached tokens
+            // are checked. Other tokens are from fresh exchanges. But just in case.
+            interopTokenResult = makeDummyTokenResult(error);
+        }
+    }
+    else {
+        interopTokenResult = {
+            token: token.token
+        };
+        // write the new token to the memory state as well as the persistent storage.
+        // Only do it if we got a valid new token
+        state.token = token;
+        await writeTokenToStorage(app, token);
+    }
+    if (shouldCallListeners) {
+        notifyTokenListeners(app, interopTokenResult);
+    }
+    return interopTokenResult;
+}
+/**
+ * Internal API for limited use tokens. Skips all FAC state and simply calls
+ * the underlying provider.
+ */
+async function getLimitedUseToken$1(appCheck) {
+    const app = appCheck.app;
+    ensureActivated(app);
+    const { provider } = getStateReference(app);
+    if (isDebugMode()) {
+        const debugToken = await getDebugToken();
+        const { token } = await exchangeToken(getExchangeDebugTokenRequest(app, debugToken), appCheck.heartbeatServiceProvider);
+        return { token };
+    }
+    else {
+        // provider is definitely valid since we ensure AppCheck was activated
+        const { token } = await provider.getToken();
+        return { token };
+    }
+}
+function addTokenListener(appCheck, type, listener, onError) {
+    const { app } = appCheck;
+    const state = getStateReference(app);
+    const tokenObserver = {
+        next: listener,
+        error: onError,
+        type
+    };
+    state.tokenObservers = [...state.tokenObservers, tokenObserver];
+    // Invoke the listener async immediately if there is a valid token
+    // in memory.
+    if (state.token && isValid(state.token)) {
+        const validToken = state.token;
+        Promise.resolve()
+            .then(() => {
+            listener({ token: validToken.token });
+            initTokenRefresher(appCheck);
+        })
+            .catch(() => {
+            /* we don't care about exceptions thrown in listeners */
+        });
+    }
+    /**
+     * Wait for any cached token promise to resolve before starting the token
+     * refresher. The refresher checks to see if there is an existing token
+     * in state and calls the exchange endpoint if not. We should first let the
+     * IndexedDB check have a chance to populate state if it can.
+     *
+     * Listener call isn't needed here because cachedTokenPromise will call any
+     * listeners that exist when it resolves.
+     */
+    // state.cachedTokenPromise is always populated in `activate()`.
+    void state.cachedTokenPromise.then(() => initTokenRefresher(appCheck));
+}
+function removeTokenListener(app, listener) {
+    const state = getStateReference(app);
+    const newObservers = state.tokenObservers.filter(tokenObserver => tokenObserver.next !== listener);
+    if (newObservers.length === 0 &&
+        state.tokenRefresher &&
+        state.tokenRefresher.isRunning()) {
+        state.tokenRefresher.stop();
+    }
+    state.tokenObservers = newObservers;
+}
+/**
+ * Logic to create and start refresher as needed.
+ */
+function initTokenRefresher(appCheck) {
+    const { app } = appCheck;
+    const state = getStateReference(app);
+    // Create the refresher but don't start it if `isTokenAutoRefreshEnabled`
+    // is not true.
+    let refresher = state.tokenRefresher;
+    if (!refresher) {
+        refresher = createTokenRefresher(appCheck);
+        state.tokenRefresher = refresher;
+    }
+    if (!refresher.isRunning() && state.isTokenAutoRefreshEnabled) {
+        refresher.start();
+    }
+}
+function createTokenRefresher(appCheck) {
+    const { app } = appCheck;
+    return new Refresher(
+    // Keep in mind when this fails for any reason other than the ones
+    // for which we should retry, it will effectively stop the proactive refresh.
+    async () => {
+        const state = getStateReference(app);
+        // If there is no token, we will try to load it from storage and use it
+        // If there is a token, we force refresh it because we know it's going to expire soon
+        let result;
+        if (!state.token) {
+            result = await getToken$2(appCheck);
+        }
+        else {
+            result = await getToken$2(appCheck, true);
+        }
+        /**
+         * getToken() always resolves. In case the result has an error field defined, it means
+         * the operation failed, and we should retry.
+         */
+        if (result.error) {
+            throw result.error;
+        }
+        /**
+         * A special `internalError` field reflects that there was an error
+         * getting a new token from the exchange endpoint, but there's still a
+         * previous token that's valid for now and this should be passed to 2P/3P
+         * requests for a token. But we want this callback (`this.operation` in
+         * `Refresher`) to throw in order to kick off the Refresher's retry
+         * backoff. (Setting `hasSucceeded` to false.)
+         */
+        if (result.internalError) {
+            throw result.internalError;
+        }
+    }, () => {
+        return true;
+    }, () => {
+        const state = getStateReference(app);
+        if (state.token) {
+            // issuedAtTime + (50% * total TTL) + 5 minutes
+            let nextRefreshTimeMillis = state.token.issuedAtTimeMillis +
+                (state.token.expireTimeMillis - state.token.issuedAtTimeMillis) *
+                    0.5 +
+                5 * 60 * 1000;
+            // Do not allow refresh time to be past (expireTime - 5 minutes)
+            const latestAllowableRefresh = state.token.expireTimeMillis - 5 * 60 * 1000;
+            nextRefreshTimeMillis = Math.min(nextRefreshTimeMillis, latestAllowableRefresh);
+            return Math.max(0, nextRefreshTimeMillis - Date.now());
+        }
+        else {
+            return 0;
+        }
+    }, TOKEN_REFRESH_TIME.RETRIAL_MIN_WAIT, TOKEN_REFRESH_TIME.RETRIAL_MAX_WAIT);
+}
+function notifyTokenListeners(app, token) {
+    const observers = getStateReference(app).tokenObservers;
+    for (const observer of observers) {
+        try {
+            if (observer.type === "EXTERNAL" /* ListenerType.EXTERNAL */ && token.error != null) {
+                // If this listener was added by a 3P call, send any token error to
+                // the supplied error handler. A 3P observer always has an error
+                // handler.
+                observer.error(token.error);
+            }
+            else {
+                // If the token has no error field, always return the token.
+                // If this is a 2P listener, return the token, whether or not it
+                // has an error field.
+                observer.next(token);
+            }
+        }
+        catch (e) {
+            // Errors in the listener function itself are always ignored.
+        }
+    }
+}
+function isValid(token) {
+    return token.expireTimeMillis - Date.now() > 0;
+}
+function makeDummyTokenResult(error) {
+    return {
+        token: formatDummyToken(defaultTokenErrorData),
+        error
+    };
+}
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * AppCheck Service class.
+ */
+class AppCheckService {
+    constructor(app, heartbeatServiceProvider) {
+        this.app = app;
+        this.heartbeatServiceProvider = heartbeatServiceProvider;
+    }
+    _delete() {
+        const { tokenObservers } = getStateReference(this.app);
+        for (const tokenObserver of tokenObservers) {
+            removeTokenListener(this.app, tokenObserver.next);
+        }
+        return Promise.resolve();
+    }
+}
+function factory(app, heartbeatServiceProvider) {
+    return new AppCheckService(app, heartbeatServiceProvider);
+}
+function internalFactory(appCheck) {
+    return {
+        getToken: forceRefresh => getToken$2(appCheck, forceRefresh),
+        getLimitedUseToken: () => getLimitedUseToken$1(appCheck),
+        addTokenListener: listener => addTokenListener(appCheck, "INTERNAL" /* ListenerType.INTERNAL */, listener),
+        removeTokenListener: listener => removeTokenListener(appCheck.app, listener)
+    };
+}
+
+const name = "@firebase/app-check";
+const version = "0.11.0";
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+const RECAPTCHA_URL = 'https://www.google.com/recaptcha/api.js';
+const RECAPTCHA_ENTERPRISE_URL = 'https://www.google.com/recaptcha/enterprise.js';
+function initializeV3(app, siteKey) {
+    const initialized = new util.Deferred();
+    const state = getStateReference(app);
+    state.reCAPTCHAState = { initialized };
+    const divId = makeDiv(app);
+    const grecaptcha = getRecaptcha(false);
+    if (!grecaptcha) {
+        loadReCAPTCHAV3Script(() => {
+            const grecaptcha = getRecaptcha(false);
+            if (!grecaptcha) {
+                // it shouldn't happen.
+                throw new Error('no recaptcha');
+            }
+            queueWidgetRender(app, siteKey, grecaptcha, divId, initialized);
+        });
+    }
+    else {
+        queueWidgetRender(app, siteKey, grecaptcha, divId, initialized);
+    }
+    return initialized.promise;
+}
+function initializeEnterprise(app, siteKey) {
+    const initialized = new util.Deferred();
+    const state = getStateReference(app);
+    state.reCAPTCHAState = { initialized };
+    const divId = makeDiv(app);
+    const grecaptcha = getRecaptcha(true);
+    if (!grecaptcha) {
+        loadReCAPTCHAEnterpriseScript(() => {
+            const grecaptcha = getRecaptcha(true);
+            if (!grecaptcha) {
+                // it shouldn't happen.
+                throw new Error('no recaptcha');
+            }
+            queueWidgetRender(app, siteKey, grecaptcha, divId, initialized);
+        });
+    }
+    else {
+        queueWidgetRender(app, siteKey, grecaptcha, divId, initialized);
+    }
+    return initialized.promise;
+}
+/**
+ * Add listener to render the widget and resolve the promise when
+ * the grecaptcha.ready() event fires.
+ */
+function queueWidgetRender(app, siteKey, grecaptcha, container, initialized) {
+    grecaptcha.ready(() => {
+        // Invisible widgets allow us to set a different siteKey for each widget,
+        // so we use them to support multiple apps
+        renderInvisibleWidget(app, siteKey, grecaptcha, container);
+        initialized.resolve(grecaptcha);
+    });
+}
+/**
+ * Add invisible div to page.
+ */
+function makeDiv(app) {
+    const divId = `fire_app_check_${app.name}`;
+    const invisibleDiv = document.createElement('div');
+    invisibleDiv.id = divId;
+    invisibleDiv.style.display = 'none';
+    document.body.appendChild(invisibleDiv);
+    return divId;
+}
+async function getToken$1(app) {
+    ensureActivated(app);
+    // ensureActivated() guarantees that reCAPTCHAState is set
+    const reCAPTCHAState = getStateReference(app).reCAPTCHAState;
+    const recaptcha = await reCAPTCHAState.initialized.promise;
+    return new Promise((resolve, _reject) => {
+        // Updated after initialization is complete.
+        const reCAPTCHAState = getStateReference(app).reCAPTCHAState;
+        recaptcha.ready(() => {
+            resolve(
+            // widgetId is guaranteed to be available if reCAPTCHAState.initialized.promise resolved.
+            recaptcha.execute(reCAPTCHAState.widgetId, {
+                action: 'fire_app_check'
+            }));
+        });
+    });
+}
+/**
+ *
+ * @param app
+ * @param container - Id of a HTML element.
+ */
+function renderInvisibleWidget(app, siteKey, grecaptcha, container) {
+    const widgetId = grecaptcha.render(container, {
+        sitekey: siteKey,
+        size: 'invisible',
+        // Success callback - set state
+        callback: () => {
+            getStateReference(app).reCAPTCHAState.succeeded = true;
+        },
+        // Failure callback - set state
+        'error-callback': () => {
+            getStateReference(app).reCAPTCHAState.succeeded = false;
+        }
+    });
+    const state = getStateReference(app);
+    state.reCAPTCHAState = {
+        ...state.reCAPTCHAState, // state.reCAPTCHAState is set in the initialize()
+        widgetId
+    };
+}
+function loadReCAPTCHAV3Script(onload) {
+    const script = document.createElement('script');
+    script.src = RECAPTCHA_URL;
+    script.onload = onload;
+    document.head.appendChild(script);
+}
+function loadReCAPTCHAEnterpriseScript(onload) {
+    const script = document.createElement('script');
+    script.src = RECAPTCHA_ENTERPRISE_URL;
+    script.onload = onload;
+    document.head.appendChild(script);
+}
+
+/**
+ * @license
+ * Copyright 2021 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * App Check provider that can obtain a reCAPTCHA V3 token and exchange it
+ * for an App Check token.
+ *
+ * @public
+ */
+class ReCaptchaV3Provider {
+    /**
+     * Create a ReCaptchaV3Provider instance.
+     * @param siteKey - ReCAPTCHA V3 siteKey.
+     */
+    constructor(_siteKey) {
+        this._siteKey = _siteKey;
+        /**
+         * Throttle requests on certain error codes to prevent too many retries
+         * in a short time.
+         */
+        this._throttleData = null;
+    }
+    /**
+     * Returns an App Check token.
+     * @internal
+     */
+    async getToken() {
+        throwIfThrottled(this._throttleData);
+        // Top-level `getToken()` has already checked that App Check is initialized
+        // and therefore this._app and this._heartbeatServiceProvider are available.
+        const attestedClaimsToken = await getToken$1(this._app).catch(_e => {
+            // reCaptcha.execute() throws null which is not very descriptive.
+            throw ERROR_FACTORY.create("recaptcha-error" /* AppCheckError.RECAPTCHA_ERROR */);
+        });
+        // Check if a failure state was set by the recaptcha "error-callback".
+        if (!getStateReference(this._app).reCAPTCHAState?.succeeded) {
+            throw ERROR_FACTORY.create("recaptcha-error" /* AppCheckError.RECAPTCHA_ERROR */);
+        }
+        let result;
+        try {
+            result = await exchangeToken(getExchangeRecaptchaV3TokenRequest(this._app, attestedClaimsToken), this._heartbeatServiceProvider);
+        }
+        catch (e) {
+            if (e.code?.includes("fetch-status-error" /* AppCheckError.FETCH_STATUS_ERROR */)) {
+                this._throttleData = setBackoff(Number(e.customData?.httpStatus), this._throttleData);
+                throw ERROR_FACTORY.create("initial-throttle" /* AppCheckError.INITIAL_THROTTLE */, {
+                    time: getDurationString(this._throttleData.allowRequestsAfter - Date.now()),
+                    httpStatus: this._throttleData.httpStatus
+                });
+            }
+            else {
+                throw e;
+            }
+        }
+        // If successful, clear throttle data.
+        this._throttleData = null;
+        return result;
+    }
+    /**
+     * @internal
+     */
+    initialize(app$1) {
+        this._app = app$1;
+        this._heartbeatServiceProvider = app._getProvider(app$1, 'heartbeat');
+        initializeV3(app$1, this._siteKey).catch(() => {
+            /* we don't care about the initialization result */
+        });
+    }
+    /**
+     * @internal
+     */
+    isEqual(otherProvider) {
+        if (otherProvider instanceof ReCaptchaV3Provider) {
+            return this._siteKey === otherProvider._siteKey;
+        }
+        else {
+            return false;
+        }
+    }
+}
+/**
+ * App Check provider that can obtain a reCAPTCHA Enterprise token and exchange it
+ * for an App Check token.
+ *
+ * @public
+ */
+class ReCaptchaEnterpriseProvider {
+    /**
+     * Create a ReCaptchaEnterpriseProvider instance.
+     * @param siteKey - reCAPTCHA Enterprise score-based site key.
+     */
+    constructor(_siteKey) {
+        this._siteKey = _siteKey;
+        /**
+         * Throttle requests on certain error codes to prevent too many retries
+         * in a short time.
+         */
+        this._throttleData = null;
+    }
+    /**
+     * Returns an App Check token.
+     * @internal
+     */
+    async getToken() {
+        throwIfThrottled(this._throttleData);
+        // Top-level `getToken()` has already checked that App Check is initialized
+        // and therefore this._app and this._heartbeatServiceProvider are available.
+        const attestedClaimsToken = await getToken$1(this._app).catch(_e => {
+            // reCaptcha.execute() throws null which is not very descriptive.
+            throw ERROR_FACTORY.create("recaptcha-error" /* AppCheckError.RECAPTCHA_ERROR */);
+        });
+        // Check if a failure state was set by the recaptcha "error-callback".
+        if (!getStateReference(this._app).reCAPTCHAState?.succeeded) {
+            throw ERROR_FACTORY.create("recaptcha-error" /* AppCheckError.RECAPTCHA_ERROR */);
+        }
+        let result;
+        try {
+            result = await exchangeToken(getExchangeRecaptchaEnterpriseTokenRequest(this._app, attestedClaimsToken), this._heartbeatServiceProvider);
+        }
+        catch (e) {
+            if (e.code?.includes("fetch-status-error" /* AppCheckError.FETCH_STATUS_ERROR */)) {
+                this._throttleData = setBackoff(Number(e.customData?.httpStatus), this._throttleData);
+                throw ERROR_FACTORY.create("initial-throttle" /* AppCheckError.INITIAL_THROTTLE */, {
+                    time: getDurationString(this._throttleData.allowRequestsAfter - Date.now()),
+                    httpStatus: this._throttleData.httpStatus
+                });
+            }
+            else {
+                throw e;
+            }
+        }
+        // If successful, clear throttle data.
+        this._throttleData = null;
+        return result;
+    }
+    /**
+     * @internal
+     */
+    initialize(app$1) {
+        this._app = app$1;
+        this._heartbeatServiceProvider = app._getProvider(app$1, 'heartbeat');
+        initializeEnterprise(app$1, this._siteKey).catch(() => {
+            /* we don't care about the initialization result */
+        });
+    }
+    /**
+     * @internal
+     */
+    isEqual(otherProvider) {
+        if (otherProvider instanceof ReCaptchaEnterpriseProvider) {
+            return this._siteKey === otherProvider._siteKey;
+        }
+        else {
+            return false;
+        }
+    }
+}
+/**
+ * Custom provider class.
+ * @public
+ */
+class CustomProvider {
+    constructor(_customProviderOptions) {
+        this._customProviderOptions = _customProviderOptions;
+    }
+    /**
+     * @internal
+     */
+    async getToken() {
+        // custom provider
+        const customToken = await this._customProviderOptions.getToken();
+        // Try to extract IAT from custom token, in case this token is not
+        // being newly issued. JWT timestamps are in seconds since epoch.
+        const issuedAtTimeSeconds = util.issuedAtTime(customToken.token);
+        // Very basic validation, use current timestamp as IAT if JWT
+        // has no `iat` field or value is out of bounds.
+        const issuedAtTimeMillis = issuedAtTimeSeconds !== null &&
+            issuedAtTimeSeconds < Date.now() &&
+            issuedAtTimeSeconds > 0
+            ? issuedAtTimeSeconds * 1000
+            : Date.now();
+        return { ...customToken, issuedAtTimeMillis };
+    }
+    /**
+     * @internal
+     */
+    initialize(app) {
+        this._app = app;
+    }
+    /**
+     * @internal
+     */
+    isEqual(otherProvider) {
+        if (otherProvider instanceof CustomProvider) {
+            return (this._customProviderOptions.getToken.toString() ===
+                otherProvider._customProviderOptions.getToken.toString());
+        }
+        else {
+            return false;
+        }
+    }
+}
+/**
+ * Set throttle data to block requests until after a certain time
+ * depending on the failed request's status code.
+ * @param httpStatus - Status code of failed request.
+ * @param throttleData - `ThrottleData` object containing previous throttle
+ * data state.
+ * @returns Data about current throttle state and expiration time.
+ */
+function setBackoff(httpStatus, throttleData) {
+    /**
+     * Block retries for 1 day for the following error codes:
+     *
+     * 404: Likely malformed URL.
+     *
+     * 403:
+     * - Attestation failed
+     * - Wrong API key
+     * - Project deleted
+     */
+    if (httpStatus === 404 || httpStatus === 403) {
+        return {
+            backoffCount: 1,
+            allowRequestsAfter: Date.now() + ONE_DAY,
+            httpStatus
+        };
+    }
+    else {
+        /**
+         * For all other error codes, the time when it is ok to retry again
+         * is based on exponential backoff.
+         */
+        const backoffCount = throttleData ? throttleData.backoffCount : 0;
+        const backoffMillis = util.calculateBackoffMillis(backoffCount, 1000, 2);
+        return {
+            backoffCount: backoffCount + 1,
+            allowRequestsAfter: Date.now() + backoffMillis,
+            httpStatus
+        };
+    }
+}
+function throwIfThrottled(throttleData) {
+    if (throttleData) {
+        if (Date.now() - throttleData.allowRequestsAfter <= 0) {
+            // If before, throw.
+            throw ERROR_FACTORY.create("throttled" /* AppCheckError.THROTTLED */, {
+                time: getDurationString(throttleData.allowRequestsAfter - Date.now()),
+                httpStatus: throttleData.httpStatus
+            });
+        }
+    }
+}
+
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * Activate App Check for the given app. Can be called only once per app.
+ * @param app - the {@link @firebase/app#FirebaseApp} to activate App Check for
+ * @param options - App Check initialization options
+ * @public
+ */
+function initializeAppCheck(app$1 = app.getApp(), options) {
+    app$1 = util.getModularInstance(app$1);
+    const provider = app._getProvider(app$1, 'app-check');
+    // Ensure initializeDebugMode() is only called once.
+    if (!getDebugState().initialized) {
+        initializeDebugMode();
+    }
+    // Log a message containing the debug token when `initializeAppCheck()`
+    // is called in debug mode.
+    if (isDebugMode()) {
+        // Do not block initialization to get the token for the message.
+        void getDebugToken().then(token => 
+        // Not using logger because I don't think we ever want this accidentally hidden.
+        console.log(`App Check debug token: ${token}. You will need to add it to your app's App Check settings in the Firebase console for it to work.`));
+    }
+    if (provider.isInitialized()) {
+        const existingInstance = provider.getImmediate();
+        const initialOptions = provider.getOptions();
+        if (initialOptions.isTokenAutoRefreshEnabled ===
+            options.isTokenAutoRefreshEnabled &&
+            initialOptions.provider.isEqual(options.provider)) {
+            return existingInstance;
+        }
+        else {
+            throw ERROR_FACTORY.create("already-initialized" /* AppCheckError.ALREADY_INITIALIZED */, {
+                appName: app$1.name
+            });
+        }
+    }
+    const appCheck = provider.initialize({ options });
+    _activate(app$1, options.provider, options.isTokenAutoRefreshEnabled);
+    // If isTokenAutoRefreshEnabled is false, do not send any requests to the
+    // exchange endpoint without an explicit call from the user either directly
+    // or through another Firebase library (storage, functions, etc.)
+    if (getStateReference(app$1).isTokenAutoRefreshEnabled) {
+        // Adding a listener will start the refresher and fetch a token if needed.
+        // This gets a token ready and prevents a delay when an internal library
+        // requests the token.
+        // Listener function does not need to do anything, its base functionality
+        // of calling getToken() already fetches token and writes it to memory/storage.
+        addTokenListener(appCheck, "INTERNAL" /* ListenerType.INTERNAL */, () => { });
+    }
+    return appCheck;
+}
+/**
+ * Activate App Check
+ * @param app - Firebase app to activate App Check for.
+ * @param provider - reCAPTCHA v3 provider or
+ * custom token provider.
+ * @param isTokenAutoRefreshEnabled - If true, the SDK automatically
+ * refreshes App Check tokens as needed. If undefined, defaults to the
+ * value of `app.automaticDataCollectionEnabled`, which defaults to
+ * false and can be set in the app config.
+ */
+function _activate(app, provider, isTokenAutoRefreshEnabled = false) {
+    // Create an entry in the APP_CHECK_STATES map. Further changes should
+    // directly mutate this object.
+    const state = setInitialState(app, { ...DEFAULT_STATE });
+    state.activated = true;
+    state.provider = provider; // Read cached token from storage if it exists and store it in memory.
+    state.cachedTokenPromise = readTokenFromStorage(app).then(cachedToken => {
+        if (cachedToken && isValid(cachedToken)) {
+            state.token = cachedToken;
+            // notify all listeners with the cached token
+            notifyTokenListeners(app, { token: cachedToken.token });
+        }
+        return cachedToken;
+    });
+    // Global `automaticDataCollectionEnabled` (defaults to true) and
+    // `isTokenAutoRefreshEnabled` must both be true.
+    state.isTokenAutoRefreshEnabled =
+        isTokenAutoRefreshEnabled && app.automaticDataCollectionEnabled;
+    if (!app.automaticDataCollectionEnabled && isTokenAutoRefreshEnabled) {
+        logger.warn('`isTokenAutoRefreshEnabled` is true but ' +
+            '`automaticDataCollectionEnabled` was set to false during' +
+            ' `initializeApp()`. This blocks automatic token refresh.');
+    }
+    state.provider.initialize(app);
+}
+/**
+ * Set whether App Check will automatically refresh tokens as needed.
+ *
+ * @param appCheckInstance - The App Check service instance.
+ * @param isTokenAutoRefreshEnabled - If true, the SDK automatically
+ * refreshes App Check tokens as needed. This overrides any value set
+ * during `initializeAppCheck()`.
+ * @public
+ */
+function setTokenAutoRefreshEnabled(appCheckInstance, isTokenAutoRefreshEnabled) {
+    const app = appCheckInstance.app;
+    const state = getStateReference(app);
+    // This will exist if any product libraries have called
+    // `addTokenListener()`
+    if (state.tokenRefresher) {
+        if (isTokenAutoRefreshEnabled === true) {
+            state.tokenRefresher.start();
+        }
+        else {
+            state.tokenRefresher.stop();
+        }
+    }
+    state.isTokenAutoRefreshEnabled = isTokenAutoRefreshEnabled;
+}
+/**
+ * Get the current App Check token. If `forceRefresh` is false, this function first
+ * checks for a valid token in memory, then local persistence (IndexedDB).
+ * If not found, or if `forceRefresh` is true, it makes a request to the
+ * App Check endpoint for a fresh token. That request attaches
+ * to the most recent in-flight request if one is present.
+ *
+ * @param appCheckInstance - The App Check service instance.
+ * @param forceRefresh - If true, will always try to fetch a fresh token.
+ * If false, will use a cached token if found in storage.
+ * @public
+ */
+async function getToken(appCheckInstance, forceRefresh) {
+    const result = await getToken$2(appCheckInstance, forceRefresh);
+    if (result.error) {
+        throw result.error;
+    }
+    if (result.internalError) {
+        throw result.internalError;
+    }
+    return { token: result.token };
+}
+/**
+ * Requests a Firebase App Check token. This method should be used
+ * only if you need to authorize requests to a non-Firebase backend.
+ *
+ * Returns limited-use tokens that are intended for use with your
+ * non-Firebase backend endpoints that are protected with
+ * <a href="https://firebase.google.com/docs/app-check/custom-resource-backend#replay-protection">
+ * Replay Protection</a>. This method
+ * does not affect the token generation behavior of the
+ * #getAppCheckToken() method.
+ *
+ * @param appCheckInstance - The App Check service instance.
+ * @returns The limited use token.
+ * @public
+ */
+function getLimitedUseToken(appCheckInstance) {
+    return getLimitedUseToken$1(appCheckInstance);
+}
+/**
+ * Wraps `addTokenListener`/`removeTokenListener` methods in an `Observer`
+ * pattern for public use.
+ */
+function onTokenChanged(appCheckInstance, onNextOrObserver, onError, 
+/**
+ * NOTE: Although an `onCompletion` callback can be provided, it will
+ * never be called because the token stream is never-ending.
+ * It is added only for API consistency with the observer pattern, which
+ * we follow in JS APIs.
+ */
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+onCompletion) {
+    let nextFn = () => { };
+    let errorFn = () => { };
+    if (onNextOrObserver.next != null) {
+        nextFn = onNextOrObserver.next.bind(onNextOrObserver);
+    }
+    else {
+        nextFn = onNextOrObserver;
+    }
+    if (onNextOrObserver.error != null) {
+        errorFn = onNextOrObserver.error.bind(onNextOrObserver);
+    }
+    else if (onError) {
+        errorFn = onError;
+    }
+    addTokenListener(appCheckInstance, "EXTERNAL" /* ListenerType.EXTERNAL */, nextFn, errorFn);
+    return () => removeTokenListener(appCheckInstance.app, nextFn);
+}
+
+/**
+ * The Firebase App Check Web SDK.
+ *
+ * @remarks
+ * Firebase App Check does not work in a Node.js environment using `ReCaptchaV3Provider` or
+ * `ReCaptchaEnterpriseProvider`, but can be used in Node.js if you use
+ * `CustomProvider` and write your own attestation method.
+ *
+ * @packageDocumentation
+ */
+const APP_CHECK_NAME = 'app-check';
+const APP_CHECK_NAME_INTERNAL = 'app-check-internal';
+function registerAppCheck() {
+    // The public interface
+    app._registerComponent(new component.Component(APP_CHECK_NAME, container => {
+        // getImmediate for FirebaseApp will always succeed
+        const app = container.getProvider('app').getImmediate();
+        const heartbeatServiceProvider = container.getProvider('heartbeat');
+        return factory(app, heartbeatServiceProvider);
+    }, "PUBLIC" /* ComponentType.PUBLIC */)
+        .setInstantiationMode("EXPLICIT" /* InstantiationMode.EXPLICIT */)
+        /**
+         * Initialize app-check-internal after app-check is initialized to make AppCheck available to
+         * other Firebase SDKs
+         */
+        .setInstanceCreatedCallback((container, _identifier, _appcheckService) => {
+        container.getProvider(APP_CHECK_NAME_INTERNAL).initialize();
+    }));
+    // The internal interface used by other Firebase products
+    app._registerComponent(new component.Component(APP_CHECK_NAME_INTERNAL, container => {
+        const appCheck = container.getProvider('app-check').getImmediate();
+        return internalFactory(appCheck);
+    }, "PUBLIC" /* ComponentType.PUBLIC */).setInstantiationMode("EXPLICIT" /* InstantiationMode.EXPLICIT */));
+    app.registerVersion(name, version);
+}
+registerAppCheck();
+
+exports.CustomProvider = CustomProvider;
+exports.ReCaptchaEnterpriseProvider = ReCaptchaEnterpriseProvider;
+exports.ReCaptchaV3Provider = ReCaptchaV3Provider;
+exports.getLimitedUseToken = getLimitedUseToken;
+exports.getToken = getToken;
+exports.initializeAppCheck = initializeAppCheck;
+exports.onTokenChanged = onTokenChanged;
+exports.setTokenAutoRefreshEnabled = setTokenAutoRefreshEnabled;
+//# sourceMappingURL=index.cjs.js.map