import { DocumentData as DocumentData_2 } from '@firebase/firestore-types';
import { FirebaseApp } from '@firebase/app-types-exp';
import { FirebaseAuthInternalName } from '@firebase/auth-interop-types';
import { _FirebaseService } from '@firebase/app-types-exp';
import { LogLevelString as LogLevel } from '@firebase/logger';
import { Provider } from '@firebase/component';
import { SetOptions as SetOptions_2 } from '@firebase/firestore-types';

/**
 * Converts Firestore's internal types to the JavaScript types that we expose
 * to the user.
 */
declare abstract class AbstractUserDataWriter {
    convertValue(value: Value, serverTimestampBehavior?: ServerTimestampBehavior): unknown;
    private convertObject;
    private convertGeoPoint;
    private convertArray;
    private convertServerTimestamp;
    private convertTimestamp;
    protected convertDocumentKey(name: string, expectedDatabaseId: DatabaseId): DocumentKey;
    protected abstract convertReference(name: string): unknown;
    protected abstract convertBytes(bytes: ByteString): unknown;
}

/**
 * Describes a map whose keys are active target ids. We do not care about the type of the
 * values.
 */
declare type ActiveTargets = SortedMap<TargetId, unknown>;

/**
 * Add a new document to specified `CollectionReference` with the given data,
 * assigning it a document ID automatically.
 *
 * @param reference - A reference to the collection to add this document to.
 * @param data - An Object containing the data for the new document.
 * @returns A Promise resolved with a `DocumentReference` pointing to the
 * newly created document after it has been written to the backend (Note that it
 * won't resolve while you're offline).
 */
export declare function addDoc<T>(reference: CollectionReference<T>, data: T): Promise<DocumentReference<T>>;

declare interface ApiClientObjectMap<T> {
    [k: string]: T;
}

/**
 * Returns a special value that can be used with {@link (setDoc:1)} or {@link
 * updateDoc} that tells the server to remove the given elements from any
 * array value that already exists on the server. All instances of each element
 * specified will be removed from the array. If the field being modified is not
 * already an array it will be overwritten with an empty array.
 *
 * @param elements - The elements to remove from the array.
 * @returns The `FieldValue` sentinel for use in a call to `setDoc()` or
 * `updateDoc()`
 */
export declare function arrayRemove(...elements: unknown[]): FieldValue;

/**
 * Returns a special value that can be used with {@link setDoc} or {@link
 * updateDoc} that tells the server to union the given elements with any array
 * value that already exists on the server. Each specified element that doesn't
 * already exist in the array will be added to the end. If the field being
 * modified is not already an array it will be overwritten with an array
 * containing exactly the specified elements.
 *
 * @param elements - The elements to union into the array.
 * @returns The `FieldValue` sentinel for use in a call to `setDoc()` or
 * `updateDoc()`.
 */
export declare function arrayUnion(...elements: unknown[]): FieldValue;

declare interface AsyncQueue {
    readonly isShuttingDown: boolean;
    /**
     * Adds a new operation to the queue without waiting for it to complete (i.e.
     * we ignore the Promise result).
     */
    enqueueAndForget<T extends unknown>(op: () => Promise<T>): void;
    /**
     * Regardless if the queue has initialized shutdown, adds a new operation to the
     * queue without waiting for it to complete (i.e. we ignore the Promise result).
     */
    enqueueAndForgetEvenWhileRestricted<T extends unknown>(op: () => Promise<T>): void;
    /**
     * Initialize the shutdown of this queue. Once this method is called, the
     * only possible way to request running an operation is through
     * `enqueueEvenWhileRestricted()`.
     */
    enterRestrictedMode(): void;
    /**
     * Adds a new operation to the queue. Returns a promise that will be resolved
     * when the promise returned by the new operation is (with its value).
     */
    enqueue<T extends unknown>(op: () => Promise<T>): Promise<T>;
    /**
     * Enqueue a retryable operation.
     *
     * A retryable operation is rescheduled with backoff if it fails with a
     * IndexedDbTransactionError (the error type used by SimpleDb). All
     * retryable operations are executed in order and only run if all prior
     * operations were retried successfully.
     */
    enqueueRetryable(op: () => Promise<void>): void;
    /**
     * Schedules an operation to be queued on the AsyncQueue once the specified
     * `delayMs` has elapsed. The returned DelayedOperation can be used to cancel
     * or fast-forward the operation prior to its running.
     */
    enqueueAfterDelay<T extends unknown>(timerId: TimerId, delayMs: number, op: () => Promise<T>): DelayedOperation<T>;
    /**
     * Verifies there's an operation currently in-progress on the AsyncQueue.
     * Unfortunately we can't verify that the running code is in the promise chain
     * of that operation, so this isn't a foolproof check, but it should be enough
     * to catch some bugs.
     */
    verifyOperationInProgress(): void;
}

/**
 * Path represents an ordered sequence of string segments.
 */
declare abstract class BasePath<B extends BasePath<B>> {
    private segments;
    private offset;
    private len;
    constructor(segments: string[], offset?: number, length?: number);
    /**
     * Abstract constructor method to construct an instance of B with the given
     * parameters.
     */
    protected abstract construct(segments: string[], offset?: number, length?: number): B;
    /**
     * Returns a String representation.
     *
     * Implementing classes are required to provide deterministic implementations as
     * the String representation is used to obtain canonical Query IDs.
     */
    abstract toString(): string;
    get length(): number;
    isEqual(other: B): boolean;
    child(nameOrPath: string | B): B;
    /** The index of one past the last segment of the path. */
    private limit;
    popFirst(size?: number): B;
    popLast(): B;
    firstSegment(): string;
    lastSegment(): string;
    get(index: number): string;
    isEmpty(): boolean;
    isPrefixOf(other: this): boolean;
    isImmediateParentOf(potentialChild: this): boolean;
    forEach(fn: (segment: string) => void): void;
    toArray(): string[];
    static comparator<T extends BasePath<T>>(p1: BasePath<T>, p2: BasePath<T>): number;
}

/**
 * @license
 * Copyright 2017 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.
 */
/**
 * BatchID is a locally assigned ID for a batch of mutations that have been
 * applied.
 */
declare type BatchId = number;

/**
 * Represents a bound of a query.
 *
 * The bound is specified with the given components representing a position and
 * whether it's just before or just after the position (relative to whatever the
 * query order is).
 *
 * The position represents a logical index position for a query. It's a prefix
 * of values for the (potentially implicit) order by clauses of a query.
 *
 * Bound provides a function to determine whether a document comes before or
 * after a bound. This is influenced by whether the position is just before or
 * just after the provided values.
 */
declare class Bound {
    readonly position: Value[];
    readonly before: boolean;
    constructor(position: Value[], before: boolean);
}

/**
 * Provides interfaces to save and read Firestore bundles.
 */
declare interface BundleCache {
    /**
     * Gets the saved `BundleMetadata` for a given `bundleId`, returns undefined
     * if no bundle metadata is found under the given id.
     */
    getBundleMetadata(transaction: PersistenceTransaction, bundleId: string): PersistencePromise<BundleMetadata | undefined>;
    /**
     * Saves a `BundleMetadata` from a bundle into local storage, using its id as
     * the persistent key.
     */
    saveBundleMetadata(transaction: PersistenceTransaction, metadata: BundleMetadata_2): PersistencePromise<void>;
    /**
     * Gets a saved `NamedQuery` for the given query name. Returns undefined if
     * no queries are found under the given name.
     */
    getNamedQuery(transaction: PersistenceTransaction, queryName: string): PersistencePromise<NamedQuery | undefined>;
    /**
     * Saves a `NamedQuery` from a bundle, using its name as the persistent key.
     */
    saveNamedQuery(transaction: PersistenceTransaction, query: NamedQuery_2): PersistencePromise<void>;
}

/** Properties of a BundledQuery. */
declare interface BundledQuery {
    /** BundledQuery parent */
    parent?: string | null;
    /** BundledQuery structuredQuery */
    structuredQuery?: StructuredQuery | null;
    /** BundledQuery limitType */
    limitType?: LimitType_2 | null;
}

/**
 * Represents a Firestore bundle saved by the SDK in its local storage.
 */
declare interface BundleMetadata {
    /**
     * Id of the bundle. It is used together with `createTime` to determine if a
     * bundle has been loaded by the SDK.
     */
    readonly id: string;
    /** Schema version of the bundle. */
    readonly version: number;
    /**
     * Set to the snapshot version of the bundle if created by the Server SDKs.
     * Otherwise set to SnapshotVersion.MIN.
     */
    readonly createTime: SnapshotVersion;
}

/** Properties of a BundleMetadata. */
declare interface BundleMetadata_2 {
    /** BundleMetadata id */
    id?: string | null;
    /** BundleMetadata createTime */
    createTime?: Timestamp_2 | null;
    /** BundleMetadata version */
    version?: number | null;
    /** BundleMetadata totalDocuments */
    totalDocuments?: number | null;
    /** BundleMetadata totalBytes */
    totalBytes?: number | null;
}

/**
 * An immutable object representing an array of bytes.
 */
export declare class Bytes {
    _byteString: ByteString;
    /** @hideconstructor */
    constructor(byteString: ByteString);
    /**
     * Creates a new `Bytes` object from the given Base64 string, converting it to
     * bytes.
     *
     * @param base64 - The Base64 string used to create the `Bytes` object.
     */
    static fromBase64String(base64: string): Bytes;
    /**
     * Creates a new `Bytes` object from the given Uint8Array.
     *
     * @param array - The Uint8Array used to create the `Bytes` object.
     */
    static fromUint8Array(array: Uint8Array): Bytes;
    /**
     * Returns the underlying bytes as a Base64-encoded string.
     *
     * @returns The Base64-encoded string created from the `Bytes` object.
     */
    toBase64(): string;
    /**
     * Returns the underlying bytes in a new `Uint8Array`.
     *
     * @returns The Uint8Array created from the `Bytes` object.
     */
    toUint8Array(): Uint8Array;
    /**
     * Returns a string representation of the `Bytes` object.
     *
     * @returns A string representation of the `Bytes` object.
     */
    toString(): string;
    /**
     * Returns true if this `Bytes` object is equal to the provided one.
     *
     * @param other - The `Bytes` object to compare against.
     * @returns true if this `Bytes` object is equal to the provided one.
     */
    isEqual(other: Bytes): boolean;
}

/**
 * @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.
 */
/**
 * Immutable class that represents a "proto" byte string.
 *
 * Proto byte strings can either be Base64-encoded strings or Uint8Arrays when
 * sent on the wire. This class abstracts away this differentiation by holding
 * the proto byte string in a common class that must be converted into a string
 * before being sent as a proto.
 */
declare class ByteString {
    private readonly binaryString;
    static readonly EMPTY_BYTE_STRING: ByteString;
    private constructor();
    static fromBase64String(base64: string): ByteString;
    static fromUint8Array(array: Uint8Array): ByteString;
    toBase64(): string;
    toUint8Array(): Uint8Array;
    approximateByteSize(): number;
    compareTo(other: ByteString): number;
    isEqual(other: ByteString): boolean;
}

/**
 * Constant used to indicate the LRU garbage collection should be disabled.
 * Set this value as the `cacheSizeBytes` on the settings passed to the
 * `Firestore` instance.
 */
export declare const CACHE_SIZE_UNLIMITED = -1;

declare const enum ChangeType {
    Added = 0,
    Removed = 1,
    Modified = 2,
    Metadata = 3
}

/**
 * Clears the persistent storage. This includes pending writes and cached
 * documents.
 *
 * Must be called while the `Firestore` instance is not started (after the app is
 * terminated or when the app is first initialized). On startup, this function
 * must be called before other functions (other than {@link
 * initializeFirestore} or {@link getFirestore})). If the `Firestore`
 * instance is still running, the promise will be rejected with the error code
 * of `failed-precondition`.
 *
 * Note: `clearIndexedDbPersistence()` is primarily intended to help write
 * reliable tests that use Cloud Firestore. It uses an efficient mechanism for
 * dropping existing data but does not attempt to securely overwrite or
 * otherwise make cached data unrecoverable. For applications that are sensitive
 * to the disclosure of cached data in between user sessions, we strongly
 * recommend not enabling persistence at all.
 *
 * @param firestore - The `Firestore` instance to clear persistence for.
 * @returns A promise that is resolved when the persistent storage is
 * cleared. Otherwise, the promise is rejected with an error.
 */
export declare function clearIndexedDbPersistence(firestore: FirebaseFirestore): Promise<void>;

/**
 * A randomly-generated key assigned to each Firestore instance at startup.
 */
declare type ClientId = string;

/**
 * Gets a `CollectionReference` instance that refers to the collection at
 * the specified absolute path.
 *
 * @param firestore - A reference to the root Firestore instance.
 * @param path - A slash-separated path to a collection.
 * @param pathSegments - Additional path segments to apply relative to the first
 * argument.
 * @throws If the final path has an even number of segments and does not point
 * to a collection.
 * @returns The `CollectionReference` instance.
 */
export declare function collection(firestore: FirebaseFirestore_2, path: string, ...pathSegments: string[]): CollectionReference<DocumentData>;

/**
 * Gets a `CollectionReference` instance that refers to a subcollection of
 * `reference` at the the specified relative path.
 *
 * @param reference - A reference to a collection.
 * @param path - A slash-separated path to a collection.
 * @param pathSegments - Additional path segments to apply relative to the first
 * argument.
 * @throws If the final path has an even number of segments and does not point
 * to a collection.
 * @returns The `CollectionReference` instance.
 */
export declare function collection(reference: CollectionReference<unknown>, path: string, ...pathSegments: string[]): CollectionReference<DocumentData>;

/**
 * Gets a `CollectionReference` instance that refers to a subcollection of
 * `reference` at the the specified relative path.
 *
 * @param reference - A reference to a Firestore document.
 * @param path - A slash-separated path to a collection.
 * @param pathSegments - Additional path segments that will be applied relative
 * to the first argument.
 * @throws If the final path has an even number of segments and does not point
 * to a collection.
 * @returns The `CollectionReference` instance.
 */
export declare function collection(reference: DocumentReference, path: string, ...pathSegments: string[]): CollectionReference<DocumentData>;

/**
 * Creates and returns a new `Query` instance that includes all documents in the
 * database that are contained in a collection or subcollection with the
 * given `collectionId`.
 *
 * @param firestore - A reference to the root Firestore instance.
 * @param collectionId - Identifies the collections to query over. Every
 * collection or subcollection with this ID as the last segment of its path
 * will be included. Cannot contain a slash.
 * @returns The created `Query`.
 */
export declare function collectionGroup(firestore: FirebaseFirestore_2, collectionId: string): Query<DocumentData>;

/**
 * A `CollectionReference` object can be used for adding documents, getting
 * document references, and querying for documents (using {@link query}).
 */
export declare class CollectionReference<T = DocumentData> extends Query<T> {
    readonly firestore: FirebaseFirestore_2;
    readonly _path: ResourcePath;
    readonly type = "collection";
    /** @hideconstructor */
    constructor(firestore: FirebaseFirestore_2, converter: FirestoreDataConverter_2<T> | null, _path: ResourcePath);
    /** The collection's identifier. */
    get id(): string;
    /**
     * A string representing the path of the referenced collection (relative
     * to the root of the database).
     */
    get path(): string;
    /**
     * A reference to the containing `DocumentReference` if this is a
     * subcollection. If this isn't a subcollection, the reference is null.
     */
    get parent(): DocumentReference<DocumentData> | null;
    /**
     * Applies a custom data converter to this CollectionReference, allowing you
     * to use your own custom model objects with Firestore. When you call {@link
     * addDoc} with the returned `CollectionReference` instance, the provided
     * converter will convert between Firestore data and your custom type `U`.
     *
     * @param converter - Converts objects to and from Firestore.
     * @returns A `CollectionReference<U>` that uses the provided converter.
     */
    withConverter<U>(converter: FirestoreDataConverter_2<U>): CollectionReference<U>;
}

/**
 * @license
 * Copyright 2017 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.
 */
declare type Comparator<K> = (key1: K, key2: K) => number;

declare interface ComponentConfiguration {
    asyncQueue: AsyncQueue;
    databaseInfo: DatabaseInfo;
    credentials: CredentialsProvider;
    clientId: ClientId;
    initialUser: User;
    maxConcurrentLimboResolutions: number;
}

declare type CompositeFilterOp = 'OPERATOR_UNSPECIFIED' | 'AND';

/**
 * A Listener for credential change events. The listener should fetch a new
 * token and may need to invalidate other state if the current user has also
 * changed.
 */
declare type CredentialChangeListener = (user: User) => void;

/**
 * Provides methods for getting the uid and token for the current user and
 * listening for changes.
 */
declare interface CredentialsProvider {
    /** Requests a token for the current user. */
    getToken(): Promise<Token | null>;
    /**
     * Marks the last retrieved token as invalid, making the next GetToken request
     * force-refresh the token.
     */
    invalidateToken(): void;
    /**
     * Specifies a listener to be notified of credential changes
     * (sign-in / sign-out, token changes). It is immediately called once with the
     * initial user.
     */
    setChangeListener(changeListener: CredentialChangeListener): void;
    /** Removes the previously-set change listener. */
    removeChangeListener(): void;
}

/** Settings for private credentials */
declare type CredentialsSettings = FirstPartyCredentialsSettings | ProviderCredentialsSettings;

/** Represents the database ID a Firestore client is associated with. */
declare class DatabaseId {
    readonly projectId: string;
    readonly database: string;
    constructor(projectId: string, database?: string);
    get isDefaultDatabase(): boolean;
    isEqual(other: {}): boolean;
}

/**
 * @license
 * Copyright 2017 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.
 */
declare class DatabaseInfo {
    readonly databaseId: DatabaseId;
    readonly persistenceKey: string;
    readonly host: string;
    readonly ssl: boolean;
    readonly forceLongPolling: boolean;
    readonly autoDetectLongPolling: boolean;
    /**
     * Constructs a DatabaseInfo using the provided host, databaseId and
     * persistenceKey.
     *
     * @param databaseId - The database to use.
     * @param persistenceKey - A unique identifier for this Firestore's local
     * storage (used in conjunction with the databaseId).
     * @param host - The Firestore backend host to connect to.
     * @param ssl - Whether to use SSL when connecting.
     * @param forceLongPolling - Whether to use the forceLongPolling option
     * when using WebChannel as the network transport.
     * @param autoDetectLongPolling - Whether to use the detectBufferingProxy
     * option when using WebChannel as the network transport.
     */
    constructor(databaseId: DatabaseId, persistenceKey: string, host: string, ssl: boolean, forceLongPolling: boolean, autoDetectLongPolling: boolean);
}

/**
 * Datastore and its related methods are a wrapper around the external Google
 * Cloud Datastore grpc API, which provides an interface that is more convenient
 * for the rest of the client SDK architecture to consume.
 */
declare abstract class Datastore {
    abstract terminate(): void;
}

/**
 * Represents an operation scheduled to be run in the future on an AsyncQueue.
 *
 * It is created via DelayedOperation.createAndSchedule().
 *
 * Supports cancellation (via cancel()) and early execution (via skipDelay()).
 *
 * Note: We implement `PromiseLike` instead of `Promise`, as the `Promise` type
 * in newer versions of TypeScript defines `finally`, which is not available in
 * IE.
 */
declare class DelayedOperation<T extends unknown> implements PromiseLike<T> {
    private readonly asyncQueue;
    readonly timerId: TimerId;
    readonly targetTimeMs: number;
    private readonly op;
    private readonly removalCallback;
    private timerHandle;
    private readonly deferred;
    private constructor();
    /**
     * Creates and returns a DelayedOperation that has been scheduled to be
     * executed on the provided asyncQueue after the provided delayMs.
     *
     * @param asyncQueue - The queue to schedule the operation on.
     * @param id - A Timer ID identifying the type of operation this is.
     * @param delayMs - The delay (ms) before the operation should be scheduled.
     * @param op - The operation to run.
     * @param removalCallback - A callback to be called synchronously once the
     *   operation is executed or canceled, notifying the AsyncQueue to remove it
     *   from its delayedOperations list.
     *   PORTING NOTE: This exists to prevent making removeDelayedOperation() and
     *   the DelayedOperation class public.
     */
    static createAndSchedule<R extends unknown>(asyncQueue: AsyncQueue, timerId: TimerId, delayMs: number, op: () => Promise<R>, removalCallback: (op: DelayedOperation<R>) => void): DelayedOperation<R>;
    /**
     * Starts the timer. This is called immediately after construction by
     * createAndSchedule().
     */
    private start;
    /**
     * Queues the operation to run immediately (if it hasn't already been run or
     * canceled).
     */
    skipDelay(): void;
    /**
     * Cancels the operation if it hasn't already been executed or canceled. The
     * promise will be rejected.
     *
     * As long as the operation has not yet been run, calling cancel() provides a
     * guarantee that the operation will not be run.
     */
    cancel(reason?: string): void;
    then: <TResult1 = T, TResult2 = never>(onfulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>;
    private handleDelayElapsed;
    private clearTimeout;
}

/**
 * Deletes the document referred to by the specified `DocumentReference`.
 *
 * @param reference - A reference to the document to delete.
 * @returns A Promise resolved once the document has been successfully
 * deleted from the backend (note that it won't resolve while you're offline).
 */
export declare function deleteDoc(reference: DocumentReference<unknown>): Promise<void>;

/**
 * Returns a sentinel for use with {@link updateDoc} or
 * {@link setDoc} with `{merge: true}` to mark a field for deletion.
 */
export declare function deleteField(): FieldValue;

/**
 * The direction of sorting in an order by.
 */
declare const enum Direction {
    ASCENDING = "asc",
    DESCENDING = "desc"
}

/**
 * Disables network usage for this instance. It can be re-enabled via {@link
 * enableNetwork}. While the network is disabled, any snapshot listeners,
 * `getDoc()` or `getDocs()` calls will return results from cache, and any write
 * operations will be queued until the network is restored.
 *
 * @returns A promise that is resolved once the network has been disabled.
 */
export declare function disableNetwork(firestore: FirebaseFirestore): Promise<void>;

/**
 * Gets a `DocumentReference` instance that refers to the document at the
 * specified abosulute path.
 *
 * @param firestore - A reference to the root Firestore instance.
 * @param path - A slash-separated path to a document.
 * @param pathSegments - Additional path segments that will be applied relative
 * to the first argument.
 * @throws If the final path has an odd number of segments and does not point to
 * a document.
 * @returns The `DocumentReference` instance.
 */
export declare function doc(firestore: FirebaseFirestore_2, path: string, ...pathSegments: string[]): DocumentReference<DocumentData>;

/**
 * Gets a `DocumentReference` instance that refers to a document within
 * `reference` at the specified relative path. If no path is specified, an
 * automatically-generated unique ID will be used for the returned
 * `DocumentReference`.
 *
 * @param reference - A reference to a collection.
 * @param path - A slash-separated path to a document. Has to be omitted to use
 * auto-genrated IDs.
 * @param pathSegments - Additional path segments that will be applied relative
 * to the first argument.
 * @throws If the final path has an odd number of segments and does not point to
 * a document.
 * @returns The `DocumentReference` instance.
 */
export declare function doc<T>(reference: CollectionReference<T>, path?: string, ...pathSegments: string[]): DocumentReference<T>;

/**
 * Gets a `DocumentReference` instance that refers to a document within
 * `reference` at the specified relative path.
 *
 * @param reference - A reference to a Firestore document.
 * @param path - A slash-separated path to a document.
 * @param pathSegments - Additional path segments that will be applied relative
 * to the first argument.
 * @throws If the final path has an odd number of segments and does not point to
 * a document.
 * @returns The `DocumentReference` instance.
 */
export declare function doc(reference: DocumentReference<unknown>, path: string, ...pathSegments: string[]): DocumentReference<DocumentData>;

/**
 * Represents a document in Firestore with a key, version, data and whether the
 * data has local mutations applied to it.
 */
declare class Document_2 extends MaybeDocument {
    private readonly objectValue;
    readonly hasLocalMutations: boolean;
    readonly hasCommittedMutations: boolean;
    constructor(key: DocumentKey, version: SnapshotVersion, objectValue: ObjectValue, options: DocumentOptions);
    field(path: FieldPath_2): Value | null;
    data(): ObjectValue;
    toProto(): {
        mapValue: MapValue;
    };
    isEqual(other: MaybeDocument | null | undefined): boolean;
    toString(): string;
    get hasPendingWrites(): boolean;
}

/**
 * A `DocumentChange` represents a change to the documents matching a query.
 * It contains the document affected and the type of change that occurred.
 */
export declare interface DocumentChange<T = DocumentData> {
    /** The type of change ('added', 'modified', or 'removed'). */
    readonly type: DocumentChangeType;
    /** The document affected by this change. */
    readonly doc: QueryDocumentSnapshot<T>;
    /**
     * The index of the changed document in the result set immediately prior to
     * this `DocumentChange` (i.e. supposing that all prior `DocumentChange` objects
     * have been applied). Is `-1` for 'added' events.
     */
    readonly oldIndex: number;
    /**
     * The index of the changed document in the result set immediately after
     * this `DocumentChange` (i.e. supposing that all prior `DocumentChange`
     * objects and the current `DocumentChange` object have been applied).
     * Is -1 for 'removed' events.
     */
    readonly newIndex: number;
}

/**
 * The type of a `DocumentChange` may be 'added', 'removed', or 'modified'.
 */
export declare type DocumentChangeType = 'added' | 'removed' | 'modified';

declare type DocumentComparator = (doc1: Document_2, doc2: Document_2) => number;

/**
 * Document data (for use with {@link setDoc}) consists of fields mapped to
 * values.
 */
export declare interface DocumentData {
    [field: string]: any;
}

/**
 * Returns a special sentinel `FieldPath` to refer to the ID of a document.
 * It can be used in queries to sort or filter by the document ID.
 */
export declare function documentId(): FieldPath;

declare class DocumentKey {
    readonly path: ResourcePath;
    constructor(path: ResourcePath);
    static fromPath(path: string): DocumentKey;
    static fromName(name: string): DocumentKey;
    /** Returns true if the document is in the specified collectionId. */
    hasCollectionId(collectionId: string): boolean;
    isEqual(other: DocumentKey | null): boolean;
    toString(): string;
    static comparator(k1: DocumentKey, k2: DocumentKey): number;
    static isDocumentKey(path: ResourcePath): boolean;
    /**
     * Creates and returns a new document key with the given segments.
     *
     * @param segments - The segments of the path to the document
     * @returns A new instance of DocumentKey
     */
    static fromSegments(segments: string[]): DocumentKey;
}

declare type DocumentKeySet = SortedSet<DocumentKey>;

declare type DocumentMap = SortedMap<DocumentKey, Document_2>;

declare interface DocumentOptions {
    hasLocalMutations?: boolean;
    hasCommittedMutations?: boolean;
}

/**
 * A `DocumentReference` refers to a document location in a Firestore database
 * and can be used to write, read, or listen to the location. The document at
 * the referenced location may or may not exist.
 */
export declare class DocumentReference<T = DocumentData> {
    readonly _converter: FirestoreDataConverter_2<T> | null;
    readonly _key: DocumentKey;
    /** The type of this Firestore reference. */
    readonly type = "document";
    /**
     * The {@link FirebaseFirestore} the document is in.
     * This is useful for performing transactions, for example.
     */
    readonly firestore: FirebaseFirestore_2;
    /** @hideconstructor */
    constructor(firestore: FirebaseFirestore_2, _converter: FirestoreDataConverter_2<T> | null, _key: DocumentKey);
    get _path(): ResourcePath;
    /**
     * The document's identifier within its collection.
     */
    get id(): string;
    /**
     * A string representing the path of the referenced document (relative
     * to the root of the database).
     */
    get path(): string;
    /**
     * The collection this `DocumentReference` belongs to.
     */
    get parent(): CollectionReference<T>;
    /**
     * Applies a custom data converter to this `DocumentReference`, allowing you
     * to use your own custom model objects with Firestore. When you call {@link
     * setDoc}, {@link getDoc}, etc. with the returned `DocumentReference`
     * instance, the provided converter will convert between Firestore data and
     * your custom type `U`.
     *
     * @param converter - Converts objects to and from Firestore.
     * @returns A `DocumentReference<U>` that uses the provided converter.
     */
    withConverter<U>(converter: FirestoreDataConverter_2<U>): DocumentReference<U>;
}

/**
 * DocumentSet is an immutable (copy-on-write) collection that holds documents
 * in order specified by the provided comparator. We always add a document key
 * comparator on top of what is provided to guarantee document equality based on
 * the key.
 */
declare class DocumentSet {
    /**
     * Returns an empty copy of the existing DocumentSet, using the same
     * comparator.
     */
    static emptySet(oldSet: DocumentSet): DocumentSet;
    private comparator;
    private keyedMap;
    private sortedSet;
    /** The default ordering is by key if the comparator is omitted */
    constructor(comp?: DocumentComparator);
    has(key: DocumentKey): boolean;
    get(key: DocumentKey): Document_2 | null;
    first(): Document_2 | null;
    last(): Document_2 | null;
    isEmpty(): boolean;
    /**
     * Returns the index of the provided key in the document set, or -1 if the
     * document key is not present in the set;
     */
    indexOf(key: DocumentKey): number;
    get size(): number;
    /** Iterates documents in order defined by "comparator" */
    forEach(cb: (doc: Document_2) => void): void;
    /** Inserts or updates a document with the same key */
    add(doc: Document_2): DocumentSet;
    /** Deletes a document with a given key */
    delete(key: DocumentKey): DocumentSet;
    isEqual(other: DocumentSet | null | undefined): boolean;
    toString(): string;
    private copy;
}

/**
 * A `DocumentSnapshot` contains data read from a document in your Firestore
 * database. The data can be extracted with `.data()` or `.get(<field>)` to
 * get a specific field.
 *
 * For a `DocumentSnapshot` that points to a non-existing document, any data
 * access will return 'undefined'. You can use the `exists()` method to
 * explicitly verify a document's existence.
 */
export declare class DocumentSnapshot<T = DocumentData> extends DocumentSnapshot_2<T> {
    readonly _firestore: FirebaseFirestore;
    private readonly _firestoreImpl;
    /**
     *  Metadata about the `DocumentSnapshot`, including information about its
     *  source and local modifications.
     */
    readonly metadata: SnapshotMetadata;
    /** @hideconstructor protected */
    constructor(_firestore: FirebaseFirestore, userDataWriter: AbstractUserDataWriter, key: DocumentKey, document: Document_2 | null, metadata: SnapshotMetadata, converter: UntypedFirestoreDataConverter<T> | null);
    /**
     * Property of the `DocumentSnapshot` that signals whether or not the data
     * exists. True if the document exists.
     */
    exists(): this is QueryDocumentSnapshot<T>;
    /**
     * Retrieves all fields in the document as an `Object`. Returns `undefined` if
     * the document doesn't exist.
     *
     * By default, `FieldValue.serverTimestamp()` values that have not yet been
     * set to their final value will be returned as `null`. You can override
     * this by passing an options object.
     *
     * @param options - An options object to configure how data is retrieved from
     * the snapshot (for example the desired behavior for server timestamps that
     * have not yet been set to their final value).
     * @returns An `Object` containing all fields in the document or `undefined` if
     * the document doesn't exist.
     */
    data(options?: SnapshotOptions): T | undefined;
    /**
     * Retrieves the field specified by `fieldPath`. Returns `undefined` if the
     * document or field doesn't exist.
     *
     * By default, a `FieldValue.serverTimestamp()` that has not yet been set to
     * its final value will be returned as `null`. You can override this by
     * passing an options object.
     *
     * @param fieldPath - The path (for example 'foo' or 'foo.bar') to a specific
     * field.
     * @param options - An options object to configure how the field is retrieved
     * from the snapshot (for example the desired behavior for server timestamps
     * that have not yet been set to their final value).
     * @returns The data at the specified field location or undefined if no such
     * field exists in the document.
     */
    get(fieldPath: string | FieldPath, options?: SnapshotOptions): any;
}

/**
 * A `DocumentSnapshot` contains data read from a document in your Firestore
 * database. The data can be extracted with `.data()` or `.get(<field>)` to
 * get a specific field.
 *
 * For a `DocumentSnapshot` that points to a non-existing document, any data
 * access will return 'undefined'. You can use the `exists()` method to
 * explicitly verify a document's existence.
 */
declare class DocumentSnapshot_2<T = DocumentData> {
    _firestore: FirebaseFirestore_2;
    _userDataWriter: AbstractUserDataWriter;
    _key: DocumentKey;
    _document: Document_2 | null;
    _converter: UntypedFirestoreDataConverter<T> | null;
    /** @hideconstructor protected */
    constructor(_firestore: FirebaseFirestore_2, _userDataWriter: AbstractUserDataWriter, _key: DocumentKey, _document: Document_2 | null, _converter: UntypedFirestoreDataConverter<T> | null);
    /** Property of the `DocumentSnapshot` that provides the document's ID. */
    get id(): string;
    /**
     * The `DocumentReference` for the document included in the `DocumentSnapshot`.
     */
    get ref(): DocumentReference<T>;
    /**
     * Signals whether or not the document at the snapshot's location exists.
     *
     * @returns true if the document exists.
     */
    exists(): this is QueryDocumentSnapshot_2<T>;
    /**
     * Retrieves all fields in the document as an `Object`. Returns `undefined` if
     * the document doesn't exist.
     *
     * @returns An `Object` containing all fields in the document or `undefined`
     * if the document doesn't exist.
     */
    data(): T | undefined;
    /**
     * Retrieves the field specified by `fieldPath`. Returns `undefined` if the
     * document or field doesn't exist.
     *
     * @param fieldPath - The path (for example 'foo' or 'foo.bar') to a specific
     * field.
     * @returns The data at the specified field location or undefined if no such
     * field exists in the document.
     */
    get(fieldPath: string | FieldPath): any;
}

declare type DocumentVersionMap = SortedMap<DocumentKey, SnapshotVersion>;

declare interface DocumentViewChange {
    type: ChangeType;
    doc: Document_2;
}

/**
 * Attempts to enable persistent storage, if possible.
 *
 * Must be called before any other functions (other than
 * {@link initializeFirestore}, {@link getFirestore} or
 * {@link clearIndexedDbPersistence}.
 *
 * If this fails, `enableIndexedDbPersistence()` will reject the promise it
 * returns. Note that even after this failure, the `Firestore` instance will
 * remain usable, however offline persistence will be disabled.
 *
 * There are several reasons why this can fail, which can be identified by
 * the `code` on the error.
 *
 *   * failed-precondition: The app is already open in another browser tab.
 *   * unimplemented: The browser is incompatible with the offline
 *     persistence implementation.
 *
 * @param firestore - The `Firestore` instance to enable persistence for.
 * @param persistenceSettings - Optional settings object to configure
 * persistence.
 * @returns A promise that represents successfully enabling persistent storage.
 */
export declare function enableIndexedDbPersistence(firestore: FirebaseFirestore, persistenceSettings?: PersistenceSettings): Promise<void>;

/**
 * Attempts to enable multi-tab persistent storage, if possible. If enabled
 * across all tabs, all operations share access to local persistence, including
 * shared execution of queries and latency-compensated local document updates
 * across all connected instances.
 *
 * If this fails, `enableMultiTabIndexedDbPersistence()` will reject the promise
 * it returns. Note that even after this failure, the `Firestore` instance will
 * remain usable, however offline persistence will be disabled.
 *
 * There are several reasons why this can fail, which can be identified by
 * the `code` on the error.
 *
 *   * failed-precondition: The app is already open in another browser tab and
 *     multi-tab is not enabled.
 *   * unimplemented: The browser is incompatible with the offline
 *     persistence implementation.
 *
 * @param firestore - The `Firestore` instance to enable persistence for.
 * @returns A promise that represents successfully enabling persistent
 * storage.
 */
export declare function enableMultiTabIndexedDbPersistence(firestore: FirebaseFirestore): Promise<void>;

/**
 * Re-enables use of the network for this Firestore instance after a prior
 * call to {@link disableNetwork}.
 *
 * @returns A promise that is resolved once the network has been enabled.
 */
export declare function enableNetwork(firestore: FirebaseFirestore): Promise<void>;

/**
 * Creates a `QueryConstraint` that modifies the result set to end at the
 * provided document (inclusive). The end position is relative to the order of
 * the query. The document must contain all of the fields provided in the
 * orderBy of the query.
 *
 * @param snapshot - The snapshot of the document to end at.
 * @returns A `QueryConstraint` to pass to `query()`
 */
export declare function endAt(snapshot: DocumentSnapshot_2<unknown>): QueryConstraint;

/**
 * Creates a `QueryConstraint` that modifies the result set to end at the
 * provided fields relative to the order of the query. The order of the field
 * values must match the order of the order by clauses of the query.
 *
 * @param fieldValues - The field values to end this query at, in order
 * of the query's order by.
 * @returns A `QueryConstraint` to pass to `query()`
 */
export declare function endAt(...fieldValues: unknown[]): QueryConstraint;

/**
 * Creates a `QueryConstraint` that modifies the result set to end before the
 * provided document (exclusive). The end position is relative to the order of
 * the query. The document must contain all of the fields provided in the
 * orderBy of the query.
 *
 * @param snapshot - The snapshot of the document to end before.
 * @returns A `QueryConstraint` to pass to `query()`
 */
export declare function endBefore(snapshot: DocumentSnapshot_2<unknown>): QueryConstraint;

/**
 * Creates a `QueryConstraint` that modifies the result set to end before the
 * provided fields relative to the order of the query. The order of the field
 * values must match the order of the order by clauses of the query.
 *
 * @param fieldValues - The field values to end this query before, in order
 * of the query's order by.
 * @returns A `QueryConstraint` to pass to `query()`
 */
export declare function endBefore(...fieldValues: unknown[]): QueryConstraint;

declare interface Entry<K, V> {
    key: K;
    value: V;
}

/**
 * EventManager is responsible for mapping queries to query event emitters.
 * It handles "fan-out". -- Identical queries will re-use the same watch on the
 * backend.
 *
 * PORTING NOTE: On Web, EventManager `onListen` and `onUnlisten` need to be
 * assigned to SyncEngine's `listen()` and `unlisten()` API before usage. This
 * allows users to tree-shake the Watch logic.
 */
declare interface EventManager {
    onListen?: (query: Query_2) => Promise<ViewSnapshot>;
    onUnlisten?: (query: Query_2) => Promise<void>;
}

declare type FieldFilterOp = 'OPERATOR_UNSPECIFIED' | 'LESS_THAN' | 'LESS_THAN_OR_EQUAL' | 'GREATER_THAN' | 'GREATER_THAN_OR_EQUAL' | 'EQUAL' | 'NOT_EQUAL' | 'ARRAY_CONTAINS' | 'IN' | 'ARRAY_CONTAINS_ANY' | 'NOT_IN';

/**
 * Provides a set of fields that can be used to partially patch a document.
 * FieldMask is used in conjunction with ObjectValue.
 * Examples:
 *   foo - Overwrites foo entirely with the provided value. If foo is not
 *         present in the companion ObjectValue, the field is deleted.
 *   foo.bar - Overwrites only the field bar of the object foo.
 *             If foo is not an object, foo is replaced with an object
 *             containing foo
 */
declare class FieldMask {
    readonly fields: FieldPath_2[];
    constructor(fields: FieldPath_2[]);
    /**
     * Verifies that `fieldPath` is included by at least one field in this field
     * mask.
     *
     * This is an O(n) operation, where `n` is the size of the field mask.
     */
    covers(fieldPath: FieldPath_2): boolean;
    isEqual(other: FieldMask): boolean;
}

/**
 * A `FieldPath` refers to a field in a document. The path may consist of a
 * single field name (referring to a top-level field in the document), or a
 * list of field names (referring to a nested field in the document).
 *
 * Create a `FieldPath` by providing field names. If more than one field
 * name is provided, the path will point to a nested field in a document.
 */
export declare class FieldPath {
    /** Internal representation of a Firestore field path. */
    readonly _internalPath: FieldPath_2;
    /**
     * Creates a FieldPath from the provided field names. If more than one field
     * name is provided, the path will point to a nested field in a document.
     *
     * @param fieldNames - A list of field names.
     */
    constructor(...fieldNames: string[]);
    /**
     * Returns true if this `FieldPath` is equal to the provided one.
     *
     * @param other - The `FieldPath` to compare against.
     * @returns true if this `FieldPath` is equal to the provided one.
     */
    isEqual(other: FieldPath): boolean;
}

/** A dot-separated path for navigating sub-objects within a document. */
declare class FieldPath_2 extends BasePath<FieldPath_2> {
    protected construct(segments: string[], offset?: number, length?: number): FieldPath_2;
    /**
     * Returns true if the string could be used as a segment in a field path
     * without escaping.
     */
    private static isValidIdentifier;
    canonicalString(): string;
    toString(): string;
    /**
     * Returns true if this field references the key of a document.
     */
    isKeyField(): boolean;
    /**
     * The field designating the key of a document.
     */
    static keyField(): FieldPath_2;
    /**
     * Parses a field string from the given server-formatted string.
     *
     * - Splitting the empty string is not allowed (for now at least).
     * - Empty segments within the string (e.g. if there are two consecutive
     *   separators) are not allowed.
     *
     * TODO(b/37244157): we should make this more strict. Right now, it allows
     * non-identifier path components, even if they aren't escaped.
     */
    static fromServerFormat(path: string): FieldPath_2;
    static emptyPath(): FieldPath_2;
}

/** A field path and the TransformOperation to perform upon it. */
declare class FieldTransform {
    readonly field: FieldPath_2;
    readonly transform: TransformOperation;
    constructor(field: FieldPath_2, transform: TransformOperation);
}

declare type FieldTransformSetToServerValue = 'SERVER_VALUE_UNSPECIFIED' | 'REQUEST_TIME';

/**
 * Sentinel values that can be used when writing document fields with `set()`
 * or `update()`.
 */
export declare abstract class FieldValue {
    _methodName: string;
    /**
     * @param _methodName - The public API endpoint that returns this class.
     */
    constructor(_methodName: string);
    abstract isEqual(other: FieldValue): boolean;
    abstract _toFieldTransform(context: ParseContext): FieldTransform | null;
}

declare abstract class Filter {
    abstract matches(doc: Document_2): boolean;
}

/**
 * The Cloud Firestore service interface.
 *
 * Do not call this constructor directly. Instead, use {@link getFirestore}.
 */
export declare class FirebaseFirestore extends FirebaseFirestore_2 {
    readonly _queue: AsyncQueue;
    readonly _persistenceKey: string;
    _firestoreClient: FirestoreClient | undefined;
    /** @hideconstructor */
    constructor(databaseIdOrApp: DatabaseId | FirebaseApp, authProvider: Provider<FirebaseAuthInternalName>);
    _terminate(): Promise<void>;
}

/**
 * The Cloud Firestore service interface.
 *
 * Do not call this constructor directly. Instead, use {@link getFirestore}.
 */
declare class FirebaseFirestore_2 implements FirestoreService {
    readonly _databaseId: DatabaseId;
    readonly _persistenceKey: string;
    _credentials: CredentialsProvider;
    private _settings;
    private _settingsFrozen;
    private _terminateTask?;
    private _app?;
    /** @hideconstructor */
    constructor(databaseIdOrApp: DatabaseId | FirebaseApp, authProvider: Provider<FirebaseAuthInternalName>);
    /**
     * The {@link FirebaseApp} associated with this `Firestore` service
     * instance.
     */
    get app(): FirebaseApp;
    get _initialized(): boolean;
    get _terminated(): boolean;
    _setSettings(settings: PrivateSettings): void;
    _getSettings(): FirestoreSettings;
    _freezeSettings(): FirestoreSettings;
    _delete(): Promise<void>;
    /**
     * Terminates all components used by this client. Subclasses can override
     * this method to clean up their own dependencies, but must also call this
     * method.
     *
     * Only ever called once.
     */
    protected _terminate(): Promise<void>;
}

/**
 * FirestoreClient is a top-level class that constructs and owns all of the
 * pieces of the client SDK architecture. It is responsible for creating the
 * async queue that is shared by all of the other components in the system.
 */
declare class FirestoreClient {
    private credentials;
    /**
     * Asynchronous queue responsible for all of our internal processing. When
     * we get incoming work from the user (via public API) or the network
     * (incoming GRPC messages), we should always schedule onto this queue.
     * This ensures all of our work is properly serialized (e.g. we don't
     * start processing a new operation while the previous one is waiting for
     * an async I/O to complete).
     */
    asyncQueue: AsyncQueue;
    private databaseInfo;
    private user;
    private readonly clientId;
    private credentialListener;
    private readonly receivedInitialUser;
    offlineComponents?: OfflineComponentProvider;
    onlineComponents?: OnlineComponentProvider;
    constructor(credentials: CredentialsProvider, 
    /**
     * Asynchronous queue responsible for all of our internal processing. When
     * we get incoming work from the user (via public API) or the network
     * (incoming GRPC messages), we should always schedule onto this queue.
     * This ensures all of our work is properly serialized (e.g. we don't
     * start processing a new operation while the previous one is waiting for
     * an async I/O to complete).
     */
    asyncQueue: AsyncQueue, databaseInfo: DatabaseInfo);
    getConfiguration(): Promise<ComponentConfiguration>;
    setCredentialChangeListener(listener: (user: User) => void): void;
    /**
     * Checks that the client has not been terminated. Ensures that other methods on
     * this class cannot be called after the client is terminated.
     */
    verifyNotTerminated(): void;
    terminate(): Promise<void>;
}

/**
 * Converter used by `withConverter()` to transform user objects of type `T`
 * into Firestore data.
 *
 * Using the converter allows you to specify generic type arguments when
 * storing and retrieving objects from Firestore.
 *
 * @example
 * ```typescript
 * class Post {
 *   constructor(readonly title: string, readonly author: string) {}
 *
 *   toString(): string {
 *     return this.title + ', by ' + this.author;
 *   }
 * }
 *
 * const postConverter = {
 *   toFirestore(post: Post): firebase.firestore.DocumentData {
 *     return {title: post.title, author: post.author};
 *   },
 *   fromFirestore(
 *     snapshot: firebase.firestore.QueryDocumentSnapshot,
 *     options: firebase.firestore.SnapshotOptions
 *   ): Post {
 *     const data = snapshot.data(options)!;
 *     return new Post(data.title, data.author);
 *   }
 * };
 *
 * const postSnap = await firebase.firestore()
 *   .collection('posts')
 *   .withConverter(postConverter)
 *   .doc().get();
 * const post = postSnap.data();
 * if (post !== undefined) {
 *   post.title; // string
 *   post.toString(); // Should be defined
 *   post.someNonExistentProperty; // TS error
 * }
 * ```
 */
export declare interface FirestoreDataConverter<T> extends FirestoreDataConverter_2<T> {
    /**
     * Called by the Firestore SDK to convert a custom model object of type `T`
     * into a plain JavaScript object (suitable for writing directly to the
     * Firestore database). To use `set()` with `merge` and `mergeFields`,
     * `toFirestore()` must be defined with `Partial<T>`.
     */
    toFirestore(modelObject: T): DocumentData;
    /**
     * Called by the Firestore SDK to convert a custom model object of type `T`
     * into a plain JavaScript object (suitable for writing directly to the
     * Firestore database). Used with {@link setData}, {@link WriteBatch#set}
     * and {@link Transaction#set} with `merge:true` or `mergeFields`.
     */
    toFirestore(modelObject: Partial<T>, options: SetOptions): DocumentData;
    /**
     * Called by the Firestore SDK to convert Firestore data into an object of
     * type T. You can access your data by calling: `snapshot.data(options)`.
     *
     * @param snapshot - A `QueryDocumentSnapshot` containing your data and metadata.
     * @param options - The `SnapshotOptions` from the initial call to `data()`.
     */
    fromFirestore(snapshot: QueryDocumentSnapshot<DocumentData>, options?: SnapshotOptions): T;
}

/**
 * Converter used by `withConverter()` to transform user objects of type `T`
 * into Firestore data.
 *
 * Using the converter allows you to specify generic type arguments when
 * storing and retrieving objects from Firestore.
 *
 * @example
 * ```typescript
 * class Post {
 *   constructor(readonly title: string, readonly author: string) {}
 *
 *   toString(): string {
 *     return this.title + ', by ' + this.author;
 *   }
 * }
 *
 * const postConverter = {
 *   toFirestore(post: Post): firebase.firestore.DocumentData {
 *     return {title: post.title, author: post.author};
 *   },
 *   fromFirestore(snapshot: firebase.firestore.QueryDocumentSnapshot): Post {
 *     const data = snapshot.data(options)!;
 *     return new Post(data.title, data.author);
 *   }
 * };
 *
 * const postSnap = await firebase.firestore()
 *   .collection('posts')
 *   .withConverter(postConverter)
 *   .doc().get();
 * const post = postSnap.data();
 * if (post !== undefined) {
 *   post.title; // string
 *   post.toString(); // Should be defined
 *   post.someNonExistentProperty; // TS error
 * }
 * ```
 */
declare interface FirestoreDataConverter_2<T> {
    /**
     * Called by the Firestore SDK to convert a custom model object of type `T`
     * into a plain Javascript object (suitable for writing directly to the
     * Firestore database). Used with {@link setData}, {@link WriteBatch#set}
     * and {@link Transaction#set}.
     */
    toFirestore(modelObject: T): DocumentData;
    /**
     * Called by the Firestore SDK to convert a custom model object of type `T`
     * into a plain Javascript object (suitable for writing directly to the
     * Firestore database). Used with {@link setData}, {@link WriteBatch#set}
     * and {@link Transaction#set} with `merge:true` or `mergeFields`.
     */
    toFirestore(modelObject: Partial<T>, options: SetOptions): DocumentData;
    /**
     * Called by the Firestore SDK to convert Firestore data into an object of
     * type T. You can access your data by calling: `snapshot.data()`.
     *
     * @param snapshot - A `QueryDocumentSnapshot` containing your data and
     * metadata.
     */
    fromFirestore(snapshot: QueryDocumentSnapshot_2<DocumentData>): T;
}

/** An error returned by a Firestore operation. */
export declare class FirestoreError extends Error {
    readonly code: FirestoreErrorCode;
    readonly message: string;
    readonly name: string;
    readonly stack?: string;
    /** @hideconstructor */
    constructor(code: FirestoreErrorCode, message: string);
}

/**
 * @license
 * Copyright 2017 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.
 */
/**
 * The set of Firestore status codes. The codes are the same at the ones
 * exposed by gRPC here:
 * https://github.com/grpc/grpc/blob/master/doc/statuscodes.md
 *
 * Possible values:
 * - 'cancelled': The operation was cancelled (typically by the caller).
 * - 'unknown': Unknown error or an error from a different error domain.
 * - 'invalid-argument': Client specified an invalid argument. Note that this
 *   differs from 'failed-precondition'. 'invalid-argument' indicates
 *   arguments that are problematic regardless of the state of the system
 *   (e.g. an invalid field name).
 * - 'deadline-exceeded': Deadline expired before operation could complete.
 *   For operations that change the state of the system, this error may be
 *   returned even if the operation has completed successfully. For example,
 *   a successful response from a server could have been delayed long enough
 *   for the deadline to expire.
 * - 'not-found': Some requested document was not found.
 * - 'already-exists': Some document that we attempted to create already
 *   exists.
 * - 'permission-denied': The caller does not have permission to execute the
 *   specified operation.
 * - 'resource-exhausted': Some resource has been exhausted, perhaps a
 *   per-user quota, or perhaps the entire file system is out of space.
 * - 'failed-precondition': Operation was rejected because the system is not
 *   in a state required for the operation's execution.
 * - 'aborted': The operation was aborted, typically due to a concurrency
 *   issue like transaction aborts, etc.
 * - 'out-of-range': Operation was attempted past the valid range.
 * - 'unimplemented': Operation is not implemented or not supported/enabled.
 * - 'internal': Internal errors. Means some invariants expected by
 *   underlying system has been broken. If you see one of these errors,
 *   something is very broken.
 * - 'unavailable': The service is currently unavailable. This is most likely
 *   a transient condition and may be corrected by retrying with a backoff.
 * - 'data-loss': Unrecoverable data loss or corruption.
 * - 'unauthenticated': The request does not have valid authentication
 *   credentials for the operation.
 */
export declare type FirestoreErrorCode = 'cancelled' | 'unknown' | 'invalid-argument' | 'deadline-exceeded' | 'not-found' | 'already-exists' | 'permission-denied' | 'resource-exhausted' | 'failed-precondition' | 'aborted' | 'out-of-range' | 'unimplemented' | 'internal' | 'unavailable' | 'data-loss' | 'unauthenticated';

/**
 * An interface implemented by FirebaseFirestore that provides compatibility
 * with the usage in this file.
 *
 * This interface mainly exists to remove a cyclic dependency.
 */
declare interface FirestoreService extends _FirebaseService {
    _credentials: CredentialsProvider;
    _persistenceKey: string;
    _databaseId: DatabaseId;
    _terminated: boolean;
    _freezeSettings(): FirestoreSettings;
}

/**
 * A concrete type describing all the values that can be applied via a
 * user-supplied firestore.Settings object. This is a separate type so that
 * defaults can be supplied and the value can be checked for equality.
 */
declare class FirestoreSettings {
    /** The hostname to connect to. */
    readonly host: string;
    /** Whether to use SSL when connecting. */
    readonly ssl: boolean;
    readonly cacheSizeBytes: number;
    readonly experimentalForceLongPolling: boolean;
    readonly experimentalAutoDetectLongPolling: boolean;
    readonly ignoreUndefinedProperties: boolean;
    credentials?: any;
    constructor(settings: PrivateSettings);
    isEqual(other: FirestoreSettings): boolean;
}

declare namespace firestoreV1ApiClientInterfaces {
    interface ArrayValue {
        values?: Value[];
    }
    interface BatchGetDocumentsRequest {
        database?: string;
        documents?: string[];
        mask?: DocumentMask;
        transaction?: string;
        newTransaction?: TransactionOptions;
        readTime?: string;
    }
    interface BatchGetDocumentsResponse {
        found?: Document;
        missing?: string;
        transaction?: string;
        readTime?: string;
    }
    interface BeginTransactionRequest {
        options?: TransactionOptions;
    }
    interface BeginTransactionResponse {
        transaction?: string;
    }
    interface CollectionSelector {
        collectionId?: string;
        allDescendants?: boolean;
    }
    interface CommitRequest {
        database?: string;
        writes?: Write[];
        transaction?: string;
    }
    interface CommitResponse {
        writeResults?: WriteResult[];
        commitTime?: string;
    }
    interface CompositeFilter {
        op?: CompositeFilterOp;
        filters?: Filter[];
    }
    interface Cursor {
        values?: Value[];
        before?: boolean;
    }
    interface Document {
        name?: string;
        fields?: ApiClientObjectMap<Value>;
        createTime?: Timestamp_2;
        updateTime?: Timestamp_2;
    }
    interface DocumentChange {
        document?: Document;
        targetIds?: number[];
        removedTargetIds?: number[];
    }
    interface DocumentDelete {
        document?: string;
        removedTargetIds?: number[];
        readTime?: Timestamp_2;
    }
    interface DocumentMask {
        fieldPaths?: string[];
    }
    interface DocumentRemove {
        document?: string;
        removedTargetIds?: number[];
        readTime?: string;
    }
    interface DocumentTransform {
        document?: string;
        fieldTransforms?: FieldTransform[];
    }
    interface DocumentsTarget {
        documents?: string[];
    }
    interface Empty {
    }
    interface ExistenceFilter {
        targetId?: number;
        count?: number;
    }
    interface FieldFilter {
        field?: FieldReference;
        op?: FieldFilterOp;
        value?: Value;
    }
    interface FieldReference {
        fieldPath?: string;
    }
    interface FieldTransform {
        fieldPath?: string;
        setToServerValue?: FieldTransformSetToServerValue;
        appendMissingElements?: ArrayValue;
        removeAllFromArray?: ArrayValue;
        increment?: Value;
    }
    interface Filter {
        compositeFilter?: CompositeFilter;
        fieldFilter?: FieldFilter;
        unaryFilter?: UnaryFilter;
    }
    interface Index {
        name?: string;
        collectionId?: string;
        fields?: IndexField[];
        state?: IndexState;
    }
    interface IndexField {
        fieldPath?: string;
        mode?: IndexFieldMode;
    }
    interface LatLng {
        latitude?: number;
        longitude?: number;
    }
    interface ListCollectionIdsRequest {
        pageSize?: number;
        pageToken?: string;
    }
    interface ListCollectionIdsResponse {
        collectionIds?: string[];
        nextPageToken?: string;
    }
    interface ListDocumentsResponse {
        documents?: Document[];
        nextPageToken?: string;
    }
    interface ListIndexesResponse {
        indexes?: Index[];
        nextPageToken?: string;
    }
    interface ListenRequest {
        addTarget?: Target;
        removeTarget?: number;
        labels?: ApiClientObjectMap<string>;
    }
    interface ListenResponse {
        targetChange?: TargetChange;
        documentChange?: DocumentChange;
        documentDelete?: DocumentDelete;
        documentRemove?: DocumentRemove;
        filter?: ExistenceFilter;
    }
    interface MapValue {
        fields?: ApiClientObjectMap<Value>;
    }
    interface Operation {
        name?: string;
        metadata?: ApiClientObjectMap<any>;
        done?: boolean;
        error?: Status;
        response?: ApiClientObjectMap<any>;
    }
    interface Order {
        field?: FieldReference;
        direction?: OrderDirection;
    }
    interface Precondition {
        exists?: boolean;
        updateTime?: Timestamp_2;
    }
    interface Projection {
        fields?: FieldReference[];
    }
    interface QueryTarget {
        parent?: string;
        structuredQuery?: StructuredQuery;
    }
    interface ReadOnly {
        readTime?: string;
    }
    interface ReadWrite {
        retryTransaction?: string;
    }
    interface RollbackRequest {
        transaction?: string;
    }
    interface RunQueryRequest {
        parent?: string;
        structuredQuery?: StructuredQuery;
        transaction?: string;
        newTransaction?: TransactionOptions;
        readTime?: string;
    }
    interface RunQueryResponse {
        transaction?: string;
        document?: Document;
        readTime?: string;
        skippedResults?: number;
    }
    interface Status {
        code?: number;
        message?: string;
        details?: Array<ApiClientObjectMap<any>>;
    }
    interface StructuredQuery {
        select?: Projection;
        from?: CollectionSelector[];
        where?: Filter;
        orderBy?: Order[];
        startAt?: Cursor;
        endAt?: Cursor;
        offset?: number;
        limit?: number | {
            value: number;
        };
    }
    interface Target {
        query?: QueryTarget;
        documents?: DocumentsTarget;
        resumeToken?: string | Uint8Array;
        readTime?: Timestamp_2;
        targetId?: number;
        once?: boolean;
    }
    interface TargetChange {
        targetChangeType?: TargetChangeTargetChangeType;
        targetIds?: number[];
        cause?: Status;
        resumeToken?: string | Uint8Array;
        readTime?: Timestamp_2;
    }
    interface TransactionOptions {
        readOnly?: ReadOnly;
        readWrite?: ReadWrite;
    }
    interface UnaryFilter {
        op?: UnaryFilterOp;
        field?: FieldReference;
    }
    interface Value {
        nullValue?: ValueNullValue;
        booleanValue?: boolean;
        integerValue?: string | number;
        doubleValue?: string | number;
        timestampValue?: Timestamp_2;
        stringValue?: string;
        bytesValue?: string | Uint8Array;
        referenceValue?: string;
        geoPointValue?: LatLng;
        arrayValue?: ArrayValue;
        mapValue?: MapValue;
    }
    interface Write {
        update?: Document;
        delete?: string;
        verify?: string;
        transform?: DocumentTransform;
        updateMask?: DocumentMask;
        updateTransforms?: FieldTransform[];
        currentDocument?: Precondition;
    }
    interface WriteRequest {
        streamId?: string;
        writes?: Write[];
        streamToken?: string | Uint8Array;
        labels?: ApiClientObjectMap<string>;
    }
    interface WriteResponse {
        streamId?: string;
        streamToken?: string | Uint8Array;
        writeResults?: WriteResult[];
        commitTime?: Timestamp_2;
    }
    interface WriteResult {
        updateTime?: Timestamp_2;
        transformResults?: Value[];
    }
}

declare interface FirstPartyCredentialsSettings {
    ['type']: 'gapi';
    ['client']: unknown;
    ['sessionIndex']: string;
}

/**
 * @license
 * Copyright 2017 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.
 */
declare type FulfilledHandler<T, R> = ((result: T) => R | PersistencePromise<R>) | null;

/**
 * Interface implemented by the LRU scheduler to start(), stop() and restart
 * garbage collection.
 */
declare interface GarbageCollectionScheduler {
    readonly started: boolean;
    start(localStore: LocalStore): void;
    stop(): void;
}

/**
 * @license
 * Copyright 2017 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.
 */
/**
 * An immutable object representing a geographic location in Firestore. The
 * location is represented as latitude/longitude pair.
 *
 * Latitude values are in the range of [-90, 90].
 * Longitude values are in the range of [-180, 180].
 */
export declare class GeoPoint {
    private _lat;
    private _long;
    /**
     * Creates a new immutable `GeoPoint` object with the provided latitude and
     * longitude values.
     * @param latitude - The latitude as number between -90 and 90.
     * @param longitude - The longitude as number between -180 and 180.
     */
    constructor(latitude: number, longitude: number);
    /**
     * The latitude of this `GeoPoint` instance.
     */
    get latitude(): number;
    /**
     * The longitude of this `GeoPoint` instance.
     */
    get longitude(): number;
    /**
     * Returns true if this `GeoPoint` is equal to the provided one.
     *
     * @param other - The `GeoPoint` to compare against.
     * @returns true if this `GeoPoint` is equal to the provided one.
     */
    isEqual(other: GeoPoint): boolean;
    toJSON(): {
        latitude: number;
        longitude: number;
    };
    /**
     * Actually private to JS consumers of our API, so this function is prefixed
     * with an underscore.
     */
    _compareTo(other: GeoPoint): number;
}

/**
 * Reads the document referred to by this `DocumentReference`.
 *
 * Note: `getDoc()` attempts to provide up-to-date data when possible by waiting
 * for data from the server, but it may return cached data or fail if you are
 * offline and the server cannot be reached. To specify this behavior, invoke
 * {@link getDocFromCache} or {@link getDocFromServer}.
 *
 * @param reference - The reference of the document to fetch.
 * @returns A Promise resolved with a `DocumentSnapshot` containing the
 * current document contents.
 */
export declare function getDoc<T>(reference: DocumentReference<T>): Promise<DocumentSnapshot<T>>;

/**
 * Reads the document referred to by this `DocumentReference` from cache.
 * Returns an error if the document is not currently cached.
 *
 * @returns A Promise resolved with a `DocumentSnapshot` containing the
 * current document contents.
 */
export declare function getDocFromCache<T>(reference: DocumentReference<T>): Promise<DocumentSnapshot<T>>;

/**
 * Reads the document referred to by this `DocumentReference` from the server.
 * Returns an error if the network is not available.
 *
 * @returns A Promise resolved with a `DocumentSnapshot` containing the
 * current document contents.
 */
export declare function getDocFromServer<T>(reference: DocumentReference<T>): Promise<DocumentSnapshot<T>>;

/**
 * Executes the query and returns the results as a `QuerySnapshot`.
 *
 * Note: `getDocs()` attempts to provide up-to-date data when possible by
 * waiting for data from the server, but it may return cached data or fail if
 * you are offline and the server cannot be reached. To specify this behavior,
 * invoke {@link getDocsFromCache} or {@link getDocsFromServer}.
 *
 * @returns A Promise that will be resolved with the results of the query.
 */
export declare function getDocs<T>(query: Query<T>): Promise<QuerySnapshot<T>>;

/**
 * Executes the query and returns the results as a `QuerySnapshot` from cache.
 * Returns an error if the document is not currently cached.
 *
 * @returns A Promise that will be resolved with the results of the query.
 */
export declare function getDocsFromCache<T>(query: Query<T>): Promise<QuerySnapshot<T>>;

/**
 * Executes the query and returns the results as a `QuerySnapshot` from the
 * server. Returns an error if the network is not available.
 *
 * @returns A Promise that will be resolved with the results of the query.
 */
export declare function getDocsFromServer<T>(query: Query<T>): Promise<QuerySnapshot<T>>;

/**
 * Returns the existing instance of Firestore that is associated with the
 * provided {@link FirebaseApp}. If no instance exists, initializes a new
 * instance with default settings.
 *
 * @param app - The {@link FirebaseApp} instance that the returned Firestore
 * instance is associated with.
 * @returns The `Firestore` instance of the provided app.
 */
export declare function getFirestore(app: FirebaseApp): FirebaseFirestore;

/**
 * Returns a special value that can be used with {@link setDoc} or {@link
 * updateDoc} that tells the server to increment the field's current value by
 * the given value.
 *
 * If either the operand or the current field value uses floating point
 * precision, all arithmetic follows IEEE 754 semantics. If both values are
 * integers, values outside of JavaScript's safe number range
 * (`Number.MIN_SAFE_INTEGER` to `Number.MAX_SAFE_INTEGER`) are also subject to
 * precision loss. Furthermore, once processed by the Firestore backend, all
 * integer operations are capped between -2^63 and 2^63-1.
 *
 * If the current field value is not of type `number`, or if the field does not
 * yet exist, the transformation sets the field to the given value.
 *
 * @param n - The value to increment by.
 * @returns The `FieldValue` sentinel for use in a call to `setDoc()` or
 * `updateDoc()`
 */
export declare function increment(n: number): FieldValue;

declare type IndexFieldMode = 'MODE_UNSPECIFIED' | 'ASCENDING' | 'DESCENDING';

/**
 * Represents a set of indexes that are used to execute queries efficiently.
 *
 * Currently the only index is a [collection id] =&gt; [parent path] index, used
 * to execute Collection Group queries.
 */
declare interface IndexManager {
    /**
     * Creates an index entry mapping the collectionId (last segment of the path)
     * to the parent path (either the containing document location or the empty
     * path for root-level collections). Index entries can be retrieved via
     * getCollectionParents().
     *
     * NOTE: Currently we don't remove index entries. If this ends up being an
     * issue we can devise some sort of GC strategy.
     */
    addToCollectionParentIndex(transaction: PersistenceTransaction, collectionPath: ResourcePath): PersistencePromise<void>;
    /**
     * Retrieves all parent locations containing the given collectionId, as a
     * list of paths (each path being either a document location or the empty
     * path for a root-level collection).
     */
    getCollectionParents(transaction: PersistenceTransaction, collectionId: string): PersistencePromise<ResourcePath[]>;
}

declare type IndexState = 'STATE_UNSPECIFIED' | 'CREATING' | 'READY' | 'ERROR';

/**
 * Initializes a new instance of Cloud Firestore with the provided settings.
 * Can only be called before any other function, including
 * {@link getFirestore}. If the custom settings are empty, this function is
 * equivalent to calling {@link getFirestore}.
 *
 * @param app - The {@link FirebaseApp} with which the `Firestore` instance will
 * be associated.
 * @param settings - A settings object to configure the `Firestore` instance.
 * @returns A newly initialized `Firestore` instance.
 */
export declare function initializeFirestore(app: FirebaseApp, settings: Settings): FirebaseFirestore;

/**
 * Creates a `QueryConstraint` that only returns the first matching documents.
 *
 * @param limit - The maximum number of items to return.
 * @returns The created `Query`.
 */
export declare function limit(limit: number): QueryConstraint;

/**
 * Creates a `QueryConstraint` that only returns the last matching documents.
 *
 * You must specify at least one `orderBy` clause for `limitToLast` queries,
 * otherwise an exception will be thrown during execution.
 *
 * @param limit - The maximum number of items to return.
 * @returns The created `Query`.
 */
export declare function limitToLast(limit: number): QueryConstraint;

declare const enum LimitType {
    First = "F",
    Last = "L"
}

/** LimitType enum. */
declare type LimitType_2 = 'FIRST' | 'LAST';

declare type ListenSequenceNumber = number;

declare class LLRBEmptyNode<K, V> {
    get key(): never;
    get value(): never;
    get color(): never;
    get left(): never;
    get right(): never;
    size: number;
    copy(key: K | null, value: V | null, color: boolean | null, left: LLRBNode<K, V> | LLRBEmptyNode<K, V> | null, right: LLRBNode<K, V> | LLRBEmptyNode<K, V> | null): LLRBEmptyNode<K, V>;
    insert(key: K, value: V, comparator: Comparator<K>): LLRBNode<K, V>;
    remove(key: K, comparator: Comparator<K>): LLRBEmptyNode<K, V>;
    isEmpty(): boolean;
    inorderTraversal(action: (k: K, v: V) => boolean): boolean;
    reverseTraversal(action: (k: K, v: V) => boolean): boolean;
    minKey(): K | null;
    maxKey(): K | null;
    isRed(): boolean;
    checkMaxDepth(): boolean;
    protected check(): 0;
}

declare class LLRBNode<K, V> {
    key: K;
    value: V;
    readonly color: boolean;
    readonly left: LLRBNode<K, V> | LLRBEmptyNode<K, V>;
    readonly right: LLRBNode<K, V> | LLRBEmptyNode<K, V>;
    readonly size: number;
    static EMPTY: LLRBEmptyNode<any, any>;
    static RED: boolean;
    static BLACK: boolean;
    constructor(key: K, value: V, color?: boolean, left?: LLRBNode<K, V> | LLRBEmptyNode<K, V>, right?: LLRBNode<K, V> | LLRBEmptyNode<K, V>);
    copy(key: K | null, value: V | null, color: boolean | null, left: LLRBNode<K, V> | LLRBEmptyNode<K, V> | null, right: LLRBNode<K, V> | LLRBEmptyNode<K, V> | null): LLRBNode<K, V>;
    isEmpty(): boolean;
    inorderTraversal<T>(action: (k: K, v: V) => T): T;
    reverseTraversal<T>(action: (k: K, v: V) => T): T;
    private min;
    minKey(): K | null;
    maxKey(): K | null;
    insert(key: K, value: V, comparator: Comparator<K>): LLRBNode<K, V>;
    private removeMin;
    remove(key: K, comparator: Comparator<K>): LLRBNode<K, V> | LLRBEmptyNode<K, V>;
    isRed(): boolean;
    private fixUp;
    private moveRedLeft;
    private moveRedRight;
    private rotateLeft;
    private rotateRight;
    private colorFlip;
    checkMaxDepth(): boolean;
    protected check(): number;
}

declare interface LocalStore {
    collectGarbage(garbageCollector: LruGarbageCollector): Promise<LruResults>;
}
export { LogLevel }

declare interface LruGarbageCollector {
    readonly params: LruParams;
    collect(txn: PersistenceTransaction, activeTargetIds: ActiveTargets): PersistencePromise<LruResults>;
    /** Given a percentile of target to collect, returns the number of targets to collect. */
    calculateTargetCount(txn: PersistenceTransaction, percentile: number): PersistencePromise<number>;
    /** Returns the nth sequence number, counting in order from the smallest. */
    nthSequenceNumber(txn: PersistenceTransaction, n: number): PersistencePromise<number>;
    /**
     * Removes documents that have a sequence number equal to or less than the
     * upper bound and are not otherwise pinned.
     */
    removeOrphanedDocuments(txn: PersistenceTransaction, upperBound: ListenSequenceNumber): PersistencePromise<number>;
    getCacheSize(txn: PersistenceTransaction): PersistencePromise<number>;
    /**
     * Removes targets with a sequence number equal to or less than the given
     * upper bound, and removes document associations with those targets.
     */
    removeTargets(txn: PersistenceTransaction, upperBound: ListenSequenceNumber, activeTargetIds: ActiveTargets): PersistencePromise<number>;
}

declare class LruParams {
    readonly cacheSizeCollectionThreshold: number;
    readonly percentileToCollect: number;
    readonly maximumSequenceNumbersToCollect: number;
    private static readonly DEFAULT_COLLECTION_PERCENTILE;
    private static readonly DEFAULT_MAX_SEQUENCE_NUMBERS_TO_COLLECT;
    static withCacheSize(cacheSize: number): LruParams;
    static readonly DEFAULT: LruParams;
    static readonly DISABLED: LruParams;
    constructor(cacheSizeCollectionThreshold: number, percentileToCollect: number, maximumSequenceNumbersToCollect: number);
}

/**
 * Describes the results of a garbage collection run. `didRun` will be set to
 * `false` if collection was skipped (either it is disabled or the cache size
 * has not hit the threshold). If collection ran, the other fields will be
 * filled in with the details of the results.
 */
declare interface LruResults {
    readonly didRun: boolean;
    readonly sequenceNumbersCollected: number;
    readonly targetsRemoved: number;
    readonly documentsRemoved: number;
}

declare type MapValue = firestoreV1ApiClientInterfaces.MapValue;

/**
 * The result of a lookup for a given path may be an existing document or a
 * marker that this document does not exist at a given version.
 */
declare abstract class MaybeDocument {
    readonly key: DocumentKey;
    readonly version: SnapshotVersion;
    constructor(key: DocumentKey, version: SnapshotVersion);
    /**
     * Whether this document had a local mutation applied that has not yet been
     * acknowledged by Watch.
     */
    abstract get hasPendingWrites(): boolean;
    abstract isEqual(other: MaybeDocument | null | undefined): boolean;
    abstract toString(): string;
}

declare type MaybeDocumentMap = SortedMap<DocumentKey, MaybeDocument>;

/**
 * A mutation describes a self-contained change to a document. Mutations can
 * create, replace, delete, and update subsets of documents.
 *
 * Mutations not only act on the value of the document but also its version.
 *
 * For local mutations (mutations that haven't been committed yet), we preserve
 * the existing version for Set and Patch mutations. For Delete mutations, we
 * reset the version to 0.
 *
 * Here's the expected transition table.
 *
 * MUTATION           APPLIED TO            RESULTS IN
 *
 * SetMutation        Document(v3)          Document(v3)
 * SetMutation        NoDocument(v3)        Document(v0)
 * SetMutation        null                  Document(v0)
 * PatchMutation      Document(v3)          Document(v3)
 * PatchMutation      NoDocument(v3)        NoDocument(v3)
 * PatchMutation      null                  null
 * DeleteMutation     Document(v3)          NoDocument(v0)
 * DeleteMutation     NoDocument(v3)        NoDocument(v0)
 * DeleteMutation     null                  NoDocument(v0)
 *
 * For acknowledged mutations, we use the updateTime of the WriteResponse as
 * the resulting version for Set and Patch mutations. As deletes have no
 * explicit update time, we use the commitTime of the WriteResponse for
 * Delete mutations.
 *
 * If a mutation is acknowledged by the backend but fails the precondition check
 * locally, we return an `UnknownDocument` and rely on Watch to send us the
 * updated version.
 *
 * Field transforms are used only with Patch and Set Mutations. We use the
 * `updateTransforms` message to store transforms, rather than the `transforms`s
 * messages.
 *
 * ## Subclassing Notes
 *
 * Subclasses of Mutation need to implement applyToRemoteDocument() and
 * applyToLocalView() to implement the actual behavior of applying the mutation
 * to some source document.
 */
declare abstract class Mutation {
    abstract readonly type: MutationType;
    abstract readonly key: DocumentKey;
    abstract readonly precondition: Precondition;
    abstract readonly fieldTransforms: FieldTransform[];
}

/**
 * A batch of mutations that will be sent as one unit to the backend.
 */
declare class MutationBatch {
    batchId: BatchId;
    localWriteTime: Timestamp;
    baseMutations: Mutation[];
    mutations: Mutation[];
    /**
     * @param batchId - The unique ID of this mutation batch.
     * @param localWriteTime - The original write time of this mutation.
     * @param baseMutations - Mutations that are used to populate the base
     * values when this mutation is applied locally. This can be used to locally
     * overwrite values that are persisted in the remote document cache. Base
     * mutations are never sent to the backend.
     * @param mutations - The user-provided mutations in this mutation batch.
     * User-provided mutations are applied both locally and remotely on the
     * backend.
     */
    constructor(batchId: BatchId, localWriteTime: Timestamp, baseMutations: Mutation[], mutations: Mutation[]);
    /**
     * Applies all the mutations in this MutationBatch to the specified document
     * to create a new remote document
     *
     * @param docKey - The key of the document to apply mutations to.
     * @param maybeDoc - The document to apply mutations to.
     * @param batchResult - The result of applying the MutationBatch to the
     * backend.
     */
    applyToRemoteDocument(docKey: DocumentKey, maybeDoc: MaybeDocument | null, batchResult: MutationBatchResult): MaybeDocument | null;
    /**
     * Computes the local view of a document given all the mutations in this
     * batch.
     *
     * @param docKey - The key of the document to apply mutations to.
     * @param maybeDoc - The document to apply mutations to.
     */
    applyToLocalView(docKey: DocumentKey, maybeDoc: MaybeDocument | null): MaybeDocument | null;
    /**
     * Computes the local view for all provided documents given the mutations in
     * this batch.
     */
    applyToLocalDocumentSet(maybeDocs: MaybeDocumentMap): MaybeDocumentMap;
    keys(): DocumentKeySet;
    isEqual(other: MutationBatch): boolean;
}

/** The result of applying a mutation batch to the backend. */
declare class MutationBatchResult {
    readonly batch: MutationBatch;
    readonly commitVersion: SnapshotVersion;
    readonly mutationResults: MutationResult[];
    /**
     * A pre-computed mapping from each mutated document to the resulting
     * version.
     */
    readonly docVersions: DocumentVersionMap;
    private constructor();
    /**
     * Creates a new MutationBatchResult for the given batch and results. There
     * must be one result for each mutation in the batch. This static factory
     * caches a document=&gt;version mapping (docVersions).
     */
    static from(batch: MutationBatch, commitVersion: SnapshotVersion, results: MutationResult[]): MutationBatchResult;
}

/** A queue of mutations to apply to the remote store. */
declare interface MutationQueue {
    /** Returns true if this queue contains no mutation batches. */
    checkEmpty(transaction: PersistenceTransaction): PersistencePromise<boolean>;
    /**
     * Creates a new mutation batch and adds it to this mutation queue.
     *
     * @param transaction - The transaction this operation is scoped to.
     * @param localWriteTime - The original write time of this mutation.
     * @param baseMutations - Mutations that are used to populate the base values
     * when this mutation is applied locally. These mutations are used to locally
     * overwrite values that are persisted in the remote document cache.
     * @param mutations - The user-provided mutations in this mutation batch.
     */
    addMutationBatch(transaction: PersistenceTransaction, localWriteTime: Timestamp, baseMutations: Mutation[], mutations: Mutation[]): PersistencePromise<MutationBatch>;
    /**
     * Loads the mutation batch with the given batchId.
     */
    lookupMutationBatch(transaction: PersistenceTransaction, batchId: BatchId): PersistencePromise<MutationBatch | null>;
    /**
     * Gets the first unacknowledged mutation batch after the passed in batchId
     * in the mutation queue or null if empty.
     *
     * @param batchId - The batch to search after, or BATCHID_UNKNOWN for the
     * first mutation in the queue.
     *
     * @returns the next mutation or null if there wasn't one.
     */
    getNextMutationBatchAfterBatchId(transaction: PersistenceTransaction, batchId: BatchId): PersistencePromise<MutationBatch | null>;
    /**
     * Gets the largest (latest) batch id in mutation queue for the current user
     * that is pending server response, returns `BATCHID_UNKNOWN` if the queue is
     * empty.
     *
     * @returns the largest batch id in the mutation queue that is not
     * acknowledged.
     */
    getHighestUnacknowledgedBatchId(transaction: PersistenceTransaction): PersistencePromise<BatchId>;
    /** Gets all mutation batches in the mutation queue. */
    getAllMutationBatches(transaction: PersistenceTransaction): PersistencePromise<MutationBatch[]>;
    /**
     * Finds all mutation batches that could possibly affect the given
     * document key. Not all mutations in a batch will necessarily affect the
     * document key, so when looping through the batch you'll need to check that
     * the mutation itself matches the key.
     *
     * Batches are guaranteed to be in sorted order.
     *
     * Note that because of this requirement implementations are free to return
     * mutation batches that don't contain the document key at all if it's
     * convenient.
     */
    getAllMutationBatchesAffectingDocumentKey(transaction: PersistenceTransaction, documentKey: DocumentKey): PersistencePromise<MutationBatch[]>;
    /**
     * Finds all mutation batches that could possibly affect the given set of
     * document keys. Not all mutations in a batch will necessarily affect each
     * key, so when looping through the batch you'll need to check that the
     * mutation itself matches the key.
     *
     * Batches are guaranteed to be in sorted order.
     *
     * Note that because of this requirement implementations are free to return
     * mutation batches that don't contain any of the document keys at all if it's
     * convenient.
     */
    getAllMutationBatchesAffectingDocumentKeys(transaction: PersistenceTransaction, documentKeys: SortedMap<DocumentKey, unknown>): PersistencePromise<MutationBatch[]>;
    /**
     * Finds all mutation batches that could affect the results for the given
     * query. Not all mutations in a batch will necessarily affect the query, so
     * when looping through the batch you'll need to check that the mutation
     * itself matches the query.
     *
     * Batches are guaranteed to be in sorted order.
     *
     * Note that because of this requirement implementations are free to return
     * mutation batches that don't match the query at all if it's convenient.
     *
     * NOTE: A PatchMutation does not need to include all fields in the query
     * filter criteria in order to be a match (but any fields it does contain do
     * need to match).
     */
    getAllMutationBatchesAffectingQuery(transaction: PersistenceTransaction, query: Query_2): PersistencePromise<MutationBatch[]>;
    /**
     * Removes the given mutation batch from the queue. This is useful in two
     * circumstances:
     *
     * + Removing an applied mutation from the head of the queue
     * + Removing a rejected mutation from anywhere in the queue
     *
     * Multi-Tab Note: This operation should only be called by the primary client.
     */
    removeMutationBatch(transaction: PersistenceTransaction, batch: MutationBatch): PersistencePromise<void>;
    /**
     * Performs a consistency check, examining the mutation queue for any
     * leaks, if possible.
     */
    performConsistencyCheck(transaction: PersistenceTransaction): PersistencePromise<void>;
}

/** The result of successfully applying a mutation to the backend. */
declare class MutationResult {
    /**
     * The version at which the mutation was committed:
     *
     * - For most operations, this is the updateTime in the WriteResult.
     * - For deletes, the commitTime of the WriteResponse (because deletes are
     *   not stored and have no updateTime).
     *
     * Note that these versions can be different: No-op writes will not change
     * the updateTime even though the commitTime advances.
     */
    readonly version: SnapshotVersion;
    /**
     * The resulting fields returned from the backend after a mutation
     * containing field transforms has been committed. Contains one FieldValue
     * for each FieldTransform that was in the mutation.
     *
     * Will be null if the mutation did not contain any field transforms.
     */
    readonly transformResults: Array<Value | null> | null;
    constructor(
    /**
     * The version at which the mutation was committed:
     *
     * - For most operations, this is the updateTime in the WriteResult.
     * - For deletes, the commitTime of the WriteResponse (because deletes are
     *   not stored and have no updateTime).
     *
     * Note that these versions can be different: No-op writes will not change
     * the updateTime even though the commitTime advances.
     */
    version: SnapshotVersion, 
    /**
     * The resulting fields returned from the backend after a mutation
     * containing field transforms has been committed. Contains one FieldValue
     * for each FieldTransform that was in the mutation.
     *
     * Will be null if the mutation did not contain any field transforms.
     */
    transformResults: Array<Value | null> | null);
}

declare const enum MutationType {
    Set = 0,
    Patch = 1,
    Delete = 2,
    Verify = 3
}

/**
 * Represents a Query saved by the SDK in its local storage.
 */
declare interface NamedQuery {
    /** The name of the query. */
    readonly name: string;
    /** The underlying query associated with `name`. */
    readonly query: Query_2;
    /** The time at which the results for this query were read. */
    readonly readTime: SnapshotVersion;
}

/** Properties of a NamedQuery. */
declare interface NamedQuery_2 {
    /** NamedQuery name */
    name?: string | null;
    /** NamedQuery bundledQuery */
    bundledQuery?: BundledQuery | null;
    /** NamedQuery readTime */
    readTime?: Timestamp_2 | null;
}

declare type NullableMaybeDocumentMap = SortedMap<DocumentKey, MaybeDocument | null>;

/**
 * @license
 * Copyright 2017 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.
 */
/**
 * A map implementation that uses objects as keys. Objects must have an
 * associated equals function and must be immutable. Entries in the map are
 * stored together with the key being produced from the mapKeyFn. This map
 * automatically handles collisions of keys.
 */
declare class ObjectMap<KeyType, ValueType> {
    private mapKeyFn;
    private equalsFn;
    /**
     * The inner map for a key/value pair. Due to the possibility of collisions we
     * keep a list of entries that we do a linear search through to find an actual
     * match. Note that collisions should be rare, so we still expect near
     * constant time lookups in practice.
     */
    private inner;
    constructor(mapKeyFn: (key: KeyType) => string, equalsFn: (l: KeyType, r: KeyType) => boolean);
    /** Get a value for this key, or undefined if it does not exist. */
    get(key: KeyType): ValueType | undefined;
    has(key: KeyType): boolean;
    /** Put this key and value in the map. */
    set(key: KeyType, value: ValueType): void;
    /**
     * Remove this key from the map. Returns a boolean if anything was deleted.
     */
    delete(key: KeyType): boolean;
    forEach(fn: (key: KeyType, val: ValueType) => void): void;
    isEmpty(): boolean;
}

/**
 * An ObjectValue represents a MapValue in the Firestore Proto and offers the
 * ability to add and remove fields (via the ObjectValueBuilder).
 */
declare class ObjectValue {
    readonly proto: {
        mapValue: MapValue;
    };
    constructor(proto: {
        mapValue: MapValue;
    });
    static empty(): ObjectValue;
    /**
     * Returns the value at the given path or null.
     *
     * @param path - the path to search
     * @returns The value at the path or if there it doesn't exist.
     */
    field(path: FieldPath_2): Value | null;
    isEqual(other: ObjectValue): boolean;
}

/**
 * Initializes and wires components that are needed to interface with the local
 * cache. Implementations override `initialize()` to provide all components.
 */
declare interface OfflineComponentProvider {
    persistence: Persistence;
    sharedClientState: SharedClientState;
    localStore: LocalStore;
    gcScheduler: GarbageCollectionScheduler | null;
    synchronizeTabs: boolean;
    initialize(cfg: ComponentConfiguration): Promise<void>;
    terminate(): Promise<void>;
}

/**
 * Initializes and wires the components that are needed to interface with the
 * network.
 */
declare class OnlineComponentProvider {
    protected localStore: LocalStore;
    protected sharedClientState: SharedClientState;
    datastore: Datastore;
    eventManager: EventManager;
    remoteStore: RemoteStore;
    syncEngine: SyncEngine;
    initialize(offlineComponentProvider: OfflineComponentProvider, cfg: ComponentConfiguration): Promise<void>;
    createEventManager(cfg: ComponentConfiguration): EventManager;
    createDatastore(cfg: ComponentConfiguration): Datastore;
    createRemoteStore(cfg: ComponentConfiguration): RemoteStore;
    createSyncEngine(cfg: ComponentConfiguration, startAsPrimary: boolean): SyncEngine;
    terminate(): Promise<void>;
}

/**
 * Describes the online state of the Firestore client. Note that this does not
 * indicate whether or not the remote store is trying to connect or not. This is
 * primarily used by the View / EventManager code to change their behavior while
 * offline (e.g. get() calls shouldn't wait for data from the server and
 * snapshot events should set metadata.isFromCache=true).
 *
 * The string values should not be changed since they are persisted in
 * WebStorage.
 */
declare const enum OnlineState {
    /**
     * The Firestore client is in an unknown online state. This means the client
     * is either not actively trying to establish a connection or it is currently
     * trying to establish a connection, but it has not succeeded or failed yet.
     * Higher-level components should not operate in offline mode.
     */
    Unknown = "Unknown",
    /**
     * The client is connected and the connections are healthy. This state is
     * reached after a successful connection and there has been at least one
     * successful message received from the backends.
     */
    Online = "Online",
    /**
     * The client is either trying to establish a connection but failing, or it
     * has been explicitly marked offline via a call to disableNetwork().
     * Higher-level components should operate in offline mode.
     */
    Offline = "Offline"
}

/**
 * Attaches a listener for `DocumentSnapshot` events. You may either pass
 * individual `onNext` and `onError` callbacks or pass a single observer
 * object with `next` and `error` callbacks.
 *
 * NOTE: Although an `onCompletion` callback can be provided, it will
 * never be called because the snapshot stream is never-ending.
 *
 * @param reference - A reference to the document to listen to.
 * @param observer - A single object containing `next` and `error` callbacks.
 * @returns An unsubscribe function that can be called to cancel
 * the snapshot listener.
 */
export declare function onSnapshot<T>(reference: DocumentReference<T>, observer: {
    next?: (snapshot: DocumentSnapshot<T>) => void;
    error?: (error: FirestoreError) => void;
    complete?: () => void;
}): Unsubscribe;

/**
 * Attaches a listener for `DocumentSnapshot` events. You may either pass
 * individual `onNext` and `onError` callbacks or pass a single observer
 * object with `next` and `error` callbacks.
 *
 * NOTE: Although an `onCompletion` callback can be provided, it will
 * never be called because the snapshot stream is never-ending.
 *
 * @param reference - A reference to the document to listen to.
 * @param options - Options controlling the listen behavior.
 * @param observer - A single object containing `next` and `error` callbacks.
 * @returns An unsubscribe function that can be called to cancel
 * the snapshot listener.
 */
export declare function onSnapshot<T>(reference: DocumentReference<T>, options: SnapshotListenOptions, observer: {
    next?: (snapshot: DocumentSnapshot<T>) => void;
    error?: (error: FirestoreError) => void;
    complete?: () => void;
}): Unsubscribe;

/**
 * Attaches a listener for `DocumentSnapshot` events. You may either pass
 * individual `onNext` and `onError` callbacks or pass a single observer
 * object with `next` and `error` callbacks.
 *
 * NOTE: Although an `onCompletion` callback can be provided, it will
 * never be called because the snapshot stream is never-ending.
 *
 * @param reference - A reference to the document to listen to.
 * @param onNext - A callback to be called every time a new `DocumentSnapshot`
 * is available.
 * @param onError - A callback to be called if the listen fails or is
 * cancelled. No further callbacks will occur.
 * @param onCompletion - Can be provided, but will not be called since streams are
 * never ending.
 * @returns An unsubscribe function that can be called to cancel
 * the snapshot listener.
 */
export declare function onSnapshot<T>(reference: DocumentReference<T>, onNext: (snapshot: DocumentSnapshot<T>) => void, onError?: (error: FirestoreError) => void, onCompletion?: () => void): Unsubscribe;

/**
 * Attaches a listener for `DocumentSnapshot` events. You may either pass
 * individual `onNext` and `onError` callbacks or pass a single observer
 * object with `next` and `error` callbacks.
 *
 * NOTE: Although an `onCompletion` callback can be provided, it will
 * never be called because the snapshot stream is never-ending.
 *
 * @param reference - A reference to the document to listen to.
 * @param options - Options controlling the listen behavior.
 * @param onNext - A callback to be called every time a new `DocumentSnapshot`
 * is available.
 * @param onError - A callback to be called if the listen fails or is
 * cancelled. No further callbacks will occur.
 * @param onCompletion - Can be provided, but will not be called since streams are
 * never ending.
 * @returns An unsubscribe function that can be called to cancel
 * the snapshot listener.
 */
export declare function onSnapshot<T>(reference: DocumentReference<T>, options: SnapshotListenOptions, onNext: (snapshot: DocumentSnapshot<T>) => void, onError?: (error: FirestoreError) => void, onCompletion?: () => void): Unsubscribe;

/**
 * Attaches a listener for `QuerySnapshot` events. You may either pass
 * individual `onNext` and `onError` callbacks or pass a single observer
 * object with `next` and `error` callbacks. The listener can be cancelled by
 * calling the function that is returned when `onSnapshot` is called.
 *
 * NOTE: Although an `onCompletion` callback can be provided, it will
 * never be called because the snapshot stream is never-ending.
 *
 * @param query - The query to listen to.
 * @param observer - A single object containing `next` and `error` callbacks.
 * @returns An unsubscribe function that can be called to cancel
 * the snapshot listener.
 */
export declare function onSnapshot<T>(query: Query<T>, observer: {
    next?: (snapshot: QuerySnapshot<T>) => void;
    error?: (error: FirestoreError) => void;
    complete?: () => void;
}): Unsubscribe;

/**
 * Attaches a listener for `QuerySnapshot` events. You may either pass
 * individual `onNext` and `onError` callbacks or pass a single observer
 * object with `next` and `error` callbacks. The listener can be cancelled by
 * calling the function that is returned when `onSnapshot` is called.
 *
 * NOTE: Although an `onCompletion` callback can be provided, it will
 * never be called because the snapshot stream is never-ending.
 *
 * @param query - The query to listen to.
 * @param options - Options controlling the listen behavior.
 * @param observer - A single object containing `next` and `error` callbacks.
 * @returns An unsubscribe function that can be called to cancel
 * the snapshot listener.
 */
export declare function onSnapshot<T>(query: Query<T>, options: SnapshotListenOptions, observer: {
    next?: (snapshot: QuerySnapshot<T>) => void;
    error?: (error: FirestoreError) => void;
    complete?: () => void;
}): Unsubscribe;

/**
 * Attaches a listener for `QuerySnapshot` events. You may either pass
 * individual `onNext` and `onError` callbacks or pass a single observer
 * object with `next` and `error` callbacks. The listener can be cancelled by
 * calling the function that is returned when `onSnapshot` is called.
 *
 * NOTE: Although an `onCompletion` callback can be provided, it will
 * never be called because the snapshot stream is never-ending.
 *
 * @param query - The query to listen to.
 * @param onNext - A callback to be called every time a new `QuerySnapshot`
 * is available.
 * @param onCompletion - Can be provided, but will not be called since streams are
 * never ending.
 * @param onError - A callback to be called if the listen fails or is
 * cancelled. No further callbacks will occur.
 * @returns An unsubscribe function that can be called to cancel
 * the snapshot listener.
 */
export declare function onSnapshot<T>(query: Query<T>, onNext: (snapshot: QuerySnapshot<T>) => void, onError?: (error: FirestoreError) => void, onCompletion?: () => void): Unsubscribe;

/**
 * Attaches a listener for `QuerySnapshot` events. You may either pass
 * individual `onNext` and `onError` callbacks or pass a single observer
 * object with `next` and `error` callbacks. The listener can be cancelled by
 * calling the function that is returned when `onSnapshot` is called.
 *
 * NOTE: Although an `onCompletion` callback can be provided, it will
 * never be called because the snapshot stream is never-ending.
 *
 * @param query - The query to listen to.
 * @param options - Options controlling the listen behavior.
 * @param onNext - A callback to be called every time a new `QuerySnapshot`
 * is available.
 * @param onCompletion - Can be provided, but will not be called since streams are
 * never ending.
 * @param onError - A callback to be called if the listen fails or is
 * cancelled. No further callbacks will occur.
 * @returns An unsubscribe function that can be called to cancel
 * the snapshot listener.
 */
export declare function onSnapshot<T>(query: Query<T>, options: SnapshotListenOptions, onNext: (snapshot: QuerySnapshot<T>) => void, onError?: (error: FirestoreError) => void, onCompletion?: () => void): Unsubscribe;

/**
 * Attaches a listener for a snapshots-in-sync event. The snapshots-in-sync
 * event indicates that all listeners affected by a given change have fired,
 * even if a single server-generated change affects multiple listeners.
 *
 * NOTE: The snapshots-in-sync event only indicates that listeners are in sync
 * with each other, but does not relate to whether those snapshots are in sync
 * with the server. Use SnapshotMetadata in the individual listeners to
 * determine if a snapshot is from the cache or the server.
 *
 * @param firestore - The instance of Firestore for synchronizing snapshots.
 * @param observer - A single object containing `next` and `error` callbacks.
 * @returns An unsubscribe function that can be called to cancel the snapshot
 * listener.
 */
export declare function onSnapshotsInSync(firestore: FirebaseFirestore, observer: {
    next?: (value: void) => void;
    error?: (error: FirestoreError) => void;
    complete?: () => void;
}): Unsubscribe;

/**
 * Attaches a listener for a snapshots-in-sync event. The snapshots-in-sync
 * event indicates that all listeners affected by a given change have fired,
 * even if a single server-generated change affects multiple listeners.
 *
 * NOTE: The snapshots-in-sync event only indicates that listeners are in sync
 * with each other, but does not relate to whether those snapshots are in sync
 * with the server. Use SnapshotMetadata in the individual listeners to
 * determine if a snapshot is from the cache or the server.
 *
 * @param firestore - The instance of Firestore for synchronizing snapshots.
 * @param onSync - A callback to be called every time all snapshot listeners are
 * in sync with each other.
 * @returns An unsubscribe function that can be called to cancel the snapshot
 * listener.
 */
export declare function onSnapshotsInSync(firestore: FirebaseFirestore, onSync: () => void): Unsubscribe;

/**
 * An ordering on a field, in some Direction. Direction defaults to ASCENDING.
 */
declare class OrderBy {
    readonly field: FieldPath_2;
    readonly dir: Direction;
    constructor(field: FieldPath_2, dir?: Direction);
}

/**
 * Creates a `QueryConstraint` that sorts the query result by the
 * specified field, optionally in descending order instead of ascending.
 *
 * @param fieldPath - The field to sort by.
 * @param directionStr - Optional direction to sort by ('asc' or 'desc'). If
 * not specified, order will be ascending.
 * @returns The created `Query`.
 */
export declare function orderBy(fieldPath: string | FieldPath, directionStr?: OrderByDirection): QueryConstraint;

/**
 * The direction of a {@link orderBy} clause is specified as 'desc' or 'asc'
 * (descending or ascending).
 */
export declare type OrderByDirection = 'desc' | 'asc';

declare type OrderDirection = 'DIRECTION_UNSPECIFIED' | 'ASCENDING' | 'DESCENDING';

declare interface ParseContext {
    readonly databaseId: DatabaseId;
    readonly ignoreUndefinedProperties: boolean;
}

/** The result of parsing document data (e.g. for a setData call). */
declare class ParsedSetData {
    readonly data: ObjectValue;
    readonly fieldMask: FieldMask | null;
    readonly fieldTransforms: FieldTransform[];
    constructor(data: ObjectValue, fieldMask: FieldMask | null, fieldTransforms: FieldTransform[]);
    toMutation(key: DocumentKey, precondition: Precondition): Mutation;
}

/** The result of parsing "update" data (i.e. for an updateData call). */
declare class ParsedUpdateData {
    readonly data: ObjectValue;
    readonly fieldMask: FieldMask;
    readonly fieldTransforms: FieldTransform[];
    constructor(data: ObjectValue, fieldMask: FieldMask, fieldTransforms: FieldTransform[]);
    toMutation(key: DocumentKey, precondition: Precondition): Mutation;
}

/**
 * Persistence is the lowest-level shared interface to persistent storage in
 * Firestore.
 *
 * Persistence is used to create MutationQueue and RemoteDocumentCache
 * instances backed by persistence (which might be in-memory or LevelDB).
 *
 * Persistence also exposes an API to create and run PersistenceTransactions
 * against persistence. All read / write operations must be wrapped in a
 * transaction. Implementations of PersistenceTransaction / Persistence only
 * need to guarantee that writes made against the transaction are not made to
 * durable storage until the transaction resolves its PersistencePromise.
 * Since memory-only storage components do not alter durable storage, they are
 * free to ignore the transaction.
 *
 * This contract is enough to allow the LocalStore be be written
 * independently of whether or not the stored state actually is durably
 * persisted. If persistent storage is enabled, writes are grouped together to
 * avoid inconsistent state that could cause crashes.
 *
 * Concretely, when persistent storage is enabled, the persistent versions of
 * MutationQueue, RemoteDocumentCache, and others (the mutators) will
 * defer their writes into a transaction. Once the local store has completed
 * one logical operation, it commits the transaction.
 *
 * When persistent storage is disabled, the non-persistent versions of the
 * mutators ignore the transaction. This short-cut is allowed because
 * memory-only storage leaves no state so it cannot be inconsistent.
 *
 * This simplifies the implementations of the mutators and allows memory-only
 * implementations to supplement the persistent ones without requiring any
 * special dual-store implementation of Persistence. The cost is that the
 * LocalStore needs to be slightly careful about the order of its reads and
 * writes in order to avoid relying on being able to read back uncommitted
 * writes.
 */
declare interface Persistence {
    /**
     * Whether or not this persistence instance has been started.
     */
    readonly started: boolean;
    readonly referenceDelegate: ReferenceDelegate;
    /** Starts persistence. */
    start(): Promise<void>;
    /**
     * Releases any resources held during eager shutdown.
     */
    shutdown(): Promise<void>;
    /**
     * Registers a listener that gets called when the database receives a
     * version change event indicating that it has deleted.
     *
     * PORTING NOTE: This is only used for Web multi-tab.
     */
    setDatabaseDeletedListener(databaseDeletedListener: () => Promise<void>): void;
    /**
     * Adjusts the current network state in the client's metadata, potentially
     * affecting the primary lease.
     *
     * PORTING NOTE: This is only used for Web multi-tab.
     */
    setNetworkEnabled(networkEnabled: boolean): void;
    /**
     * Returns a MutationQueue representing the persisted mutations for the
     * given user.
     *
     * Note: The implementation is free to return the same instance every time
     * this is called for a given user. In particular, the memory-backed
     * implementation does this to emulate the persisted implementation to the
     * extent possible (e.g. in the case of uid switching from
     * sally=&gt;jack=&gt;sally, sally's mutation queue will be preserved).
     */
    getMutationQueue(user: User): MutationQueue;
    /**
     * Returns a TargetCache representing the persisted cache of targets.
     *
     * Note: The implementation is free to return the same instance every time
     * this is called. In particular, the memory-backed implementation does this
     * to emulate the persisted implementation to the extent possible.
     */
    getTargetCache(): TargetCache;
    /**
     * Returns a RemoteDocumentCache representing the persisted cache of remote
     * documents.
     *
     * Note: The implementation is free to return the same instance every time
     * this is called. In particular, the memory-backed implementation does this
     * to emulate the persisted implementation to the extent possible.
     */
    getRemoteDocumentCache(): RemoteDocumentCache;
    /**
     * Returns a BundleCache representing the persisted cache of loaded bundles.
     *
     * Note: The implementation is free to return the same instance every time
     * this is called. In particular, the memory-backed implementation does this
     * to emulate the persisted implementation to the extent possible.
     */
    getBundleCache(): BundleCache;
    /**
     * Returns an IndexManager instance that manages our persisted query indexes.
     *
     * Note: The implementation is free to return the same instance every time
     * this is called. In particular, the memory-backed implementation does this
     * to emulate the persisted implementation to the extent possible.
     */
    getIndexManager(): IndexManager;
    /**
     * Performs an operation inside a persistence transaction. Any reads or writes
     * against persistence must be performed within a transaction. Writes will be
     * committed atomically once the transaction completes.
     *
     * Persistence operations are asynchronous and therefore the provided
     * transactionOperation must return a PersistencePromise. When it is resolved,
     * the transaction will be committed and the Promise returned by this method
     * will resolve.
     *
     * @param action - A description of the action performed by this transaction,
     * used for logging.
     * @param mode - The underlying mode of the IndexedDb transaction. Can be
     * 'readonly', 'readwrite' or 'readwrite-primary'. Transactions marked
     * 'readwrite-primary' can only be executed by the primary client. In this
     * mode, the transactionOperation will not be run if the primary lease cannot
     * be acquired and the returned promise will be rejected with a
     * FAILED_PRECONDITION error.
     * @param transactionOperation - The operation to run inside a transaction.
     * @returns A promise that is resolved once the transaction completes.
     */
    runTransaction<T>(action: string, mode: PersistenceTransactionMode, transactionOperation: (transaction: PersistenceTransaction) => PersistencePromise<T>): Promise<T>;
}

/**
 * PersistencePromise is essentially a re-implementation of Promise except
 * it has a .next() method instead of .then() and .next() and .catch() callbacks
 * are executed synchronously when a PersistencePromise resolves rather than
 * asynchronously (Promise implementations use setImmediate() or similar).
 *
 * This is necessary to interoperate with IndexedDB which will automatically
 * commit transactions if control is returned to the event loop without
 * synchronously initiating another operation on the transaction.
 *
 * NOTE: .then() and .catch() only allow a single consumer, unlike normal
 * Promises.
 */
declare class PersistencePromise<T> {
    private nextCallback;
    private catchCallback;
    private result;
    private error;
    private isDone;
    private callbackAttached;
    constructor(callback: (resolve: Resolver<T>, reject: Rejector) => void);
    catch<R>(fn: (error: Error) => R | PersistencePromise<R>): PersistencePromise<R>;
    next<R>(nextFn?: FulfilledHandler<T, R>, catchFn?: RejectedHandler<R>): PersistencePromise<R>;
    toPromise(): Promise<T>;
    private wrapUserFunction;
    private wrapSuccess;
    private wrapFailure;
    static resolve(): PersistencePromise<void>;
    static resolve<R>(result: R): PersistencePromise<R>;
    static reject<R>(error: Error): PersistencePromise<R>;
    static waitFor(all: {
        forEach: (cb: (el: PersistencePromise<any>) => void) => void;
    }): PersistencePromise<void>;
    /**
     * Given an array of predicate functions that asynchronously evaluate to a
     * boolean, implements a short-circuiting `or` between the results. Predicates
     * will be evaluated until one of them returns `true`, then stop. The final
     * result will be whether any of them returned `true`.
     */
    static or(predicates: Array<() => PersistencePromise<boolean>>): PersistencePromise<boolean>;
    /**
     * Given an iterable, call the given function on each element in the
     * collection and wait for all of the resulting concurrent PersistencePromises
     * to resolve.
     */
    static forEach<R, S>(collection: {
        forEach: (cb: (r: R, s: S) => void) => void;
    }, f: ((r: R, s: S) => PersistencePromise<void>) | ((r: R) => PersistencePromise<void>)): PersistencePromise<void>;
    static forEach<R>(collection: {
        forEach: (cb: (r: R) => void) => void;
    }, f: (r: R) => PersistencePromise<void>): PersistencePromise<void>;
}

export declare interface PersistenceSettings {
    forceOwnership?: boolean;
}

/**
 * A base class representing a persistence transaction, encapsulating both the
 * transaction's sequence numbers as well as a list of onCommitted listeners.
 *
 * When you call Persistence.runTransaction(), it will create a transaction and
 * pass it to your callback. You then pass it to any method that operates
 * on persistence.
 */
declare abstract class PersistenceTransaction {
    private readonly onCommittedListeners;
    abstract readonly currentSequenceNumber: ListenSequenceNumber;
    addOnCommittedListener(listener: () => void): void;
    raiseOnCommittedEvent(): void;
}

/** The different modes supported by `Persistence.runTransaction()`. */
declare type PersistenceTransactionMode = 'readonly' | 'readwrite' | 'readwrite-primary';

/**
 * Encodes a precondition for a mutation. This follows the model that the
 * backend accepts with the special case of an explicit "empty" precondition
 * (meaning no precondition).
 */
declare class Precondition {
    readonly updateTime?: SnapshotVersion | undefined;
    readonly exists?: boolean | undefined;
    private constructor();
    /** Creates a new empty Precondition. */
    static none(): Precondition;
    /** Creates a new Precondition with an exists flag. */
    static exists(exists: boolean): Precondition;
    /** Creates a new Precondition based on a version a document exists at. */
    static updateTime(version: SnapshotVersion): Precondition;
    /** Returns whether this Precondition is empty. */
    get isNone(): boolean;
    isEqual(other: Precondition): boolean;
}

/** Undocumented, private additional settings not exposed in our public API. */
declare interface PrivateSettings extends Settings_2 {
    credentials?: CredentialsSettings;
}

declare interface ProviderCredentialsSettings {
    ['type']: 'provider';
    ['client']: CredentialsProvider;
}

/**
 * A `Query` refers to a Query which you can read or listen to. You can also
 * construct refined `Query` objects by adding filters and ordering.
 */
export declare class Query<T = DocumentData> {
    readonly _converter: FirestoreDataConverter_2<T> | null;
    readonly _query: Query_2;
    /** The type of this Firestore reference. */
    readonly type: 'query' | 'collection';
    /**
     * The `FirebaseFirestore` for the Firestore database (useful for performing
     * transactions, etc.).
     */
    readonly firestore: FirebaseFirestore_2;
    /** @hideconstructor protected */
    constructor(firestore: FirebaseFirestore_2, _converter: FirestoreDataConverter_2<T> | null, _query: Query_2);
    /**
     * Applies a custom data converter to this query, allowing you to use your own
     * custom model objects with Firestore. When you call {@link getDocs} with
     * the returned query, the provided converter will convert between Firestore
     * data and your custom type `U`.
     *
     * @param converter - Converts objects to and from Firestore.
     * @returns A `Query<U>` that uses the provided converter.
     */
    withConverter<U>(converter: FirestoreDataConverter_2<U>): Query<U>;
}

/**
 * Creates a new immutable instance of `query` that is extended to also include
 * additional query constraints.
 *
 * @param query - The query instance to use as a base for the new constraints.
 * @param queryConstraints - The list of `QueryConstraint`s to apply.
 * @throws if any of the provided query constraints cannot be combined with the
 * existing or new constraints.
 */
export declare function query<T>(query: Query<T>, ...queryConstraints: QueryConstraint[]): Query<T>;

/**
 * The Query interface defines all external properties of a query.
 *
 * QueryImpl implements this interface to provide memoization for `queryOrderBy`
 * and `queryToTarget`.
 */
declare interface Query_2 {
    readonly path: ResourcePath;
    readonly collectionGroup: string | null;
    readonly explicitOrderBy: OrderBy[];
    readonly filters: Filter[];
    readonly limit: number | null;
    readonly limitType: LimitType;
    readonly startAt: Bound | null;
    readonly endAt: Bound | null;
}

/**
 * A `QueryConstraint` is used to narrow the set of documents returned by a
 * Firestore query. `QueryConstraint`s are created by invoking {@link where},
 * {@link orderBy}, {@link startAt}, {@link startAfter}, {@link
 * endBefore}, {@link endAt}, {@link limit} or {@link limitToLast} and
 * can then be passed to {@link query} to create a new query instance that
 * also contains this `QueryConstraint`.
 */
export declare abstract class QueryConstraint {
    /** The type of this query constraints */
    abstract readonly type: QueryConstraintType;
    /**
     * Takes the provided `Query` and returns a copy of the `Query` with this
     * `QueryConstraint` applied.
     */
    abstract _apply<T>(query: Query<T>): Query<T>;
}

/** Describes the different query constraints available in this SDK. */
export declare type QueryConstraintType = 'where' | 'orderBy' | 'limit' | 'limitToLast' | 'startAt' | 'startAfter' | 'endAt' | 'endBefore';

/**
 * A `QueryDocumentSnapshot` contains data read from a document in your
 * Firestore database as part of a query. The document is guaranteed to exist
 * and its data can be extracted with `.data()` or `.get(<field>)` to get a
 * specific field.
 *
 * A `QueryDocumentSnapshot` offers the same API surface as a
 * `DocumentSnapshot`. Since query results contain only existing documents, the
 * `exists` property will always be true and `data()` will never return
 * 'undefined'.
 */
export declare class QueryDocumentSnapshot<T = DocumentData> extends DocumentSnapshot<T> {
    /**
     * Retrieves all fields in the document as an `Object`.
     *
     * By default, `FieldValue.serverTimestamp()` values that have not yet been
     * set to their final value will be returned as `null`. You can override
     * this by passing an options object.
     *
     * @override
     * @param options - An options object to configure how data is retrieved from
     * the snapshot (for example the desired behavior for server timestamps that
     * have not yet been set to their final value).
     * @returns An `Object` containing all fields in the document.
     */
    data(options?: SnapshotOptions): T;
}

/**
 * A `QueryDocumentSnapshot` contains data read from a document in your
 * Firestore database as part of a query. The document is guaranteed to exist
 * and its data can be extracted with `.data()` or `.get(<field>)` to get a
 * specific field.
 *
 * A `QueryDocumentSnapshot` offers the same API surface as a
 * `DocumentSnapshot`. Since query results contain only existing documents, the
 * `exists` property will always be true and `data()` will never return
 * 'undefined'.
 */
declare class QueryDocumentSnapshot_2<T = DocumentData> extends DocumentSnapshot_2<T> {
    /**
     * Retrieves all fields in the document as an `Object`.
     *
     * @override
     * @returns An `Object` containing all fields in the document.
     */
    data(): T;
}

/**
 * Returns true if the provided queries point to the same collection and apply
 * the same constraints.
 *
 * @param left - A `Query` to compare.
 * @param right - A `Query` to compare.
 * @returns true if the references point to the same location in the same
 * Firestore database.
 */
export declare function queryEqual<T>(left: Query<T>, right: Query<T>): boolean;

/**
 * A `QuerySnapshot` contains zero or more `DocumentSnapshot` objects
 * representing the results of a query. The documents can be accessed as an
 * array via the `docs` property or enumerated using the `forEach` method. The
 * number of documents can be determined via the `empty` and `size`
 * properties.
 */
export declare class QuerySnapshot<T = DocumentData> {
    readonly _firestore: FirebaseFirestore;
    readonly _userDataWriter: AbstractUserDataWriter;
    readonly _snapshot: ViewSnapshot;
    /**
     * Metadata about this snapshot, concerning its source and if it has local
     * modifications.
     */
    readonly metadata: SnapshotMetadata;
    /**
     * The query on which you called `get` or `onSnapshot` in order to get this
     * `QuerySnapshot`.
     */
    readonly query: Query<T>;
    private _cachedChanges?;
    private _cachedChangesIncludeMetadataChanges?;
    /** @hideconstructor */
    constructor(_firestore: FirebaseFirestore, _userDataWriter: AbstractUserDataWriter, query: Query<T>, _snapshot: ViewSnapshot);
    /** An array of all the documents in the `QuerySnapshot`. */
    get docs(): Array<QueryDocumentSnapshot<T>>;
    /** The number of documents in the `QuerySnapshot`. */
    get size(): number;
    /** True if there are no documents in the `QuerySnapshot`. */
    get empty(): boolean;
    /**
     * Enumerates all of the documents in the `QuerySnapshot`.
     *
     * @param callback - A callback to be called with a `QueryDocumentSnapshot` for
     * each document in the snapshot.
     * @param thisArg - The `this` binding for the callback.
     */
    forEach(callback: (result: QueryDocumentSnapshot<T>) => void, thisArg?: unknown): void;
    /**
     * Returns an array of the documents changes since the last snapshot. If this
     * is the first snapshot, all documents will be in the list as 'added'
     * changes.
     *
     * @param options - `SnapshotListenOptions` that control whether metadata-only
     * changes (i.e. only `DocumentSnapshot.metadata` changed) should trigger
     * snapshot events.
     */
    docChanges(options?: SnapshotListenOptions): Array<DocumentChange<T>>;
}

/** The different states of a watch target. */
declare type QueryTargetState = 'not-current' | 'current' | 'rejected';

/**
 * Returns true if the provided references are equal.
 *
 * @param left - A reference to compare.
 * @param right - A reference to compare.
 * @returns true if the references point to the same location in the same
 * Firestore database.
 */
export declare function refEqual<T>(left: DocumentReference<T> | CollectionReference<T>, right: DocumentReference<T> | CollectionReference<T>): boolean;

/**
 * A ReferenceDelegate instance handles all of the hooks into the document-reference lifecycle. This
 * includes being added to a target, being removed from a target, being subject to mutation, and
 * being mutated by the user.
 *
 * Different implementations may do different things with each of these events. Not every
 * implementation needs to do something with every lifecycle hook.
 *
 * PORTING NOTE: since sequence numbers are attached to transactions in this
 * client, the ReferenceDelegate does not need to deal in transactional
 * semantics (onTransactionStarted/Committed()), nor does it need to track and
 * generate sequence numbers (getCurrentSequenceNumber()).
 */
declare interface ReferenceDelegate {
    /** Notify the delegate that the given document was added to a target. */
    addReference(txn: PersistenceTransaction, targetId: TargetId, doc: DocumentKey): PersistencePromise<void>;
    /** Notify the delegate that the given document was removed from a target. */
    removeReference(txn: PersistenceTransaction, targetId: TargetId, doc: DocumentKey): PersistencePromise<void>;
    /**
     * Notify the delegate that a target was removed. The delegate may, but is not obligated to,
     * actually delete the target and associated data.
     */
    removeTarget(txn: PersistenceTransaction, targetData: TargetData): PersistencePromise<void>;
    /**
     * Notify the delegate that a document may no longer be part of any views or
     * have any mutations associated.
     */
    markPotentiallyOrphaned(txn: PersistenceTransaction, doc: DocumentKey): PersistencePromise<void>;
    /** Notify the delegate that a limbo document was updated. */
    updateLimboDocument(txn: PersistenceTransaction, doc: DocumentKey): PersistencePromise<void>;
}

declare type RejectedHandler<R> = ((reason: Error) => R | PersistencePromise<R>) | null;

declare type Rejector = (error: Error) => void;

/**
 * Represents cached documents received from the remote backend.
 *
 * The cache is keyed by DocumentKey and entries in the cache are MaybeDocument
 * instances, meaning we can cache both Document instances (an actual document
 * with data) as well as NoDocument instances (indicating that the document is
 * known to not exist).
 */
declare interface RemoteDocumentCache {
    /**
     * Looks up an entry in the cache.
     *
     * @param documentKey - The key of the entry to look up.*
     * @returns The cached Document or NoDocument entry, or null if we have
     * nothing cached.
     */
    getEntry(transaction: PersistenceTransaction, documentKey: DocumentKey): PersistencePromise<MaybeDocument | null>;
    /**
     * Looks up a set of entries in the cache.
     *
     * @param documentKeys - The keys of the entries to look up.
     * @returns The cached Document or NoDocument entries indexed by key. If an
     * entry is not cached, the corresponding key will be mapped to a null value.
     */
    getEntries(transaction: PersistenceTransaction, documentKeys: DocumentKeySet): PersistencePromise<NullableMaybeDocumentMap>;
    /**
     * Executes a query against the cached Document entries.
     *
     * Implementations may return extra documents if convenient. The results
     * should be re-filtered by the consumer before presenting them to the user.
     *
     * Cached NoDocument entries have no bearing on query results.
     *
     * @param query - The query to match documents against.
     * @param sinceReadTime - If not set to SnapshotVersion.min(), return only
     *     documents that have been read since this snapshot version (exclusive).
     * @returns The set of matching documents.
     */
    getDocumentsMatchingQuery(transaction: PersistenceTransaction, query: Query_2, sinceReadTime: SnapshotVersion): PersistencePromise<DocumentMap>;
    /**
     * Provides access to add or update the contents of the cache. The buffer
     * handles proper size accounting for the change.
     *
     * Multi-Tab Note: This should only be called by the primary client.
     *
     * @param options - Specify `trackRemovals` to create sentinel entries for
     * removed documents, which allows removals to be tracked by
     * `getNewDocumentChanges()`.
     */
    newChangeBuffer(options?: {
        trackRemovals: boolean;
    }): RemoteDocumentChangeBuffer;
    /**
     * Get an estimate of the size of the document cache. Note that for eager
     * garbage collection, we don't track sizes so this will return 0.
     */
    getSize(transaction: PersistenceTransaction): PersistencePromise<number>;
}

/**
 * Represents a document change to be applied to remote document cache.
 */
declare interface RemoteDocumentChange {
    readonly maybeDocument: MaybeDocument | null;
    readonly readTime: SnapshotVersion | null;
}

/**
 * An in-memory buffer of entries to be written to a RemoteDocumentCache.
 * It can be used to batch up a set of changes to be written to the cache, but
 * additionally supports reading entries back with the `getEntry()` method,
 * falling back to the underlying RemoteDocumentCache if no entry is
 * buffered.
 *
 * Entries added to the cache *must* be read first. This is to facilitate
 * calculating the size delta of the pending changes.
 *
 * PORTING NOTE: This class was implemented then removed from other platforms.
 * If byte-counting ends up being needed on the other platforms, consider
 * porting this class as part of that implementation work.
 */
declare abstract class RemoteDocumentChangeBuffer {
    protected changes: ObjectMap<DocumentKey, RemoteDocumentChange>;
    private changesApplied;
    protected abstract getFromCache(transaction: PersistenceTransaction, documentKey: DocumentKey): PersistencePromise<MaybeDocument | null>;
    protected abstract getAllFromCache(transaction: PersistenceTransaction, documentKeys: DocumentKeySet): PersistencePromise<NullableMaybeDocumentMap>;
    protected abstract applyChanges(transaction: PersistenceTransaction): PersistencePromise<void>;
    protected getReadTime(key: DocumentKey): SnapshotVersion;
    /**
     * Buffers a `RemoteDocumentCache.addEntry()` call.
     *
     * You can only modify documents that have already been retrieved via
     * `getEntry()/getEntries()` (enforced via IndexedDbs `apply()`).
     */
    addEntry(maybeDocument: MaybeDocument, readTime: SnapshotVersion): void;
    /**
     * Buffers a `RemoteDocumentCache.removeEntry()` call.
     *
     * You can only remove documents that have already been retrieved via
     * `getEntry()/getEntries()` (enforced via IndexedDbs `apply()`).
     */
    removeEntry(key: DocumentKey, readTime?: SnapshotVersion | null): void;
    /**
     * Looks up an entry in the cache. The buffered changes will first be checked,
     * and if no buffered change applies, this will forward to
     * `RemoteDocumentCache.getEntry()`.
     *
     * @param transaction - The transaction in which to perform any persistence
     *     operations.
     * @param documentKey - The key of the entry to look up.
     * @returns The cached Document or NoDocument entry, or null if we have
     *     nothing cached.
     */
    getEntry(transaction: PersistenceTransaction, documentKey: DocumentKey): PersistencePromise<MaybeDocument | null>;
    /**
     * Looks up several entries in the cache, forwarding to
     * `RemoteDocumentCache.getEntry()`.
     *
     * @param transaction - The transaction in which to perform any persistence
     *     operations.
     * @param documentKeys - The keys of the entries to look up.
     * @returns A map of cached `Document`s or `NoDocument`s, indexed by key. If
     *     an entry cannot be found, the corresponding key will be mapped to a
     *     null value.
     */
    getEntries(transaction: PersistenceTransaction, documentKeys: DocumentKeySet): PersistencePromise<NullableMaybeDocumentMap>;
    /**
     * Applies buffered changes to the underlying RemoteDocumentCache, using
     * the provided transaction.
     */
    apply(transaction: PersistenceTransaction): PersistencePromise<void>;
    /** Helper to assert this.changes is not null  */
    protected assertNotApplied(): void;
}

/**
 * An event from the RemoteStore. It is split into targetChanges (changes to the
 * state or the set of documents in our watched targets) and documentUpdates
 * (changes to the actual documents).
 */
declare class RemoteEvent {
    /**
     * The snapshot version this event brings us up to, or MIN if not set.
     */
    readonly snapshotVersion: SnapshotVersion;
    /**
     * A map from target to changes to the target. See TargetChange.
     */
    readonly targetChanges: Map<TargetId, TargetChange>;
    /**
     * A set of targets that is known to be inconsistent. Listens for these
     * targets should be re-established without resume tokens.
     */
    readonly targetMismatches: SortedSet<TargetId>;
    /**
     * A set of which documents have changed or been deleted, along with the
     * doc's new values (if not deleted).
     */
    readonly documentUpdates: MaybeDocumentMap;
    /**
     * A set of which document updates are due only to limbo resolution targets.
     */
    readonly resolvedLimboDocuments: DocumentKeySet;
    constructor(
    /**
     * The snapshot version this event brings us up to, or MIN if not set.
     */
    snapshotVersion: SnapshotVersion, 
    /**
     * A map from target to changes to the target. See TargetChange.
     */
    targetChanges: Map<TargetId, TargetChange>, 
    /**
     * A set of targets that is known to be inconsistent. Listens for these
     * targets should be re-established without resume tokens.
     */
    targetMismatches: SortedSet<TargetId>, 
    /**
     * A set of which documents have changed or been deleted, along with the
     * doc's new values (if not deleted).
     */
    documentUpdates: MaybeDocumentMap, 
    /**
     * A set of which document updates are due only to limbo resolution targets.
     */
    resolvedLimboDocuments: DocumentKeySet);
    /**
     * HACK: Views require RemoteEvents in order to determine whether the view is
     * CURRENT, but secondary tabs don't receive remote events. So this method is
     * used to create a synthesized RemoteEvent that can be used to apply a
     * CURRENT status change to a View, for queries executed in a different tab.
     */
    static createSynthesizedRemoteEventForCurrentChange(targetId: TargetId, current: boolean): RemoteEvent;
}

/**
 * RemoteStore - An interface to remotely stored data, basically providing a
 * wrapper around the Datastore that is more reliable for the rest of the
 * system.
 *
 * RemoteStore is responsible for maintaining the connection to the server.
 * - maintaining a list of active listens.
 * - reconnecting when the connection is dropped.
 * - resuming all the active listens on reconnect.
 *
 * RemoteStore handles all incoming events from the Datastore.
 * - listening to the watch stream and repackaging the events as RemoteEvents
 * - notifying SyncEngine of any changes to the active listens.
 *
 * RemoteStore takes writes from other components and handles them reliably.
 * - pulling pending mutations from LocalStore and sending them to Datastore.
 * - retrying mutations that failed because of network problems.
 * - acking mutations to the SyncEngine once they are accepted or rejected.
 */
declare interface RemoteStore {
    /**
     * SyncEngine to notify of watch and write events. This must be set
     * immediately after construction.
     */
    remoteSyncer: RemoteSyncer;
}

/**
 * An interface that describes the actions the RemoteStore needs to perform on
 * a cooperating synchronization engine.
 */
declare interface RemoteSyncer {
    /**
     * Applies one remote event to the sync engine, notifying any views of the
     * changes, and releasing any pending mutation batches that would become
     * visible because of the snapshot version the remote event contains.
     */
    applyRemoteEvent?(remoteEvent: RemoteEvent): Promise<void>;
    /**
     * Rejects the listen for the given targetID. This can be triggered by the
     * backend for any active target.
     *
     * @param targetId - The targetID corresponds to one previously initiated by
     * the user as part of TargetData passed to listen() on RemoteStore.
     * @param error - A description of the condition that has forced the rejection.
     * Nearly always this will be an indication that the user is no longer
     * authorized to see the data matching the target.
     */
    rejectListen?(targetId: TargetId, error: FirestoreError): Promise<void>;
    /**
     * Applies the result of a successful write of a mutation batch to the sync
     * engine, emitting snapshots in any views that the mutation applies to, and
     * removing the batch from the mutation queue.
     */
    applySuccessfulWrite?(result: MutationBatchResult): Promise<void>;
    /**
     * Rejects the batch, removing the batch from the mutation queue, recomputing
     * the local view of any documents affected by the batch and then, emitting
     * snapshots with the reverted value.
     */
    rejectFailedWrite?(batchId: BatchId, error: FirestoreError): Promise<void>;
    /**
     * Returns the set of remote document keys for the given target ID. This list
     * includes the documents that were assigned to the target when we received
     * the last snapshot.
     */
    getRemoteKeysForTarget?(targetId: TargetId): DocumentKeySet;
    /**
     * Updates all local state to match the pending mutations for the given user.
     * May be called repeatedly for the same user.
     */
    handleCredentialChange?(user: User): Promise<void>;
}

declare type Resolver<T> = (value?: T) => void;

/**
 * A slash-separated path for navigating resources (documents and collections)
 * within Firestore.
 */
declare class ResourcePath extends BasePath<ResourcePath> {
    protected construct(segments: string[], offset?: number, length?: number): ResourcePath;
    canonicalString(): string;
    toString(): string;
    /**
     * Creates a resource path from the given slash-delimited string. If multiple
     * arguments are provided, all components are combined. Leading and trailing
     * slashes from all components are ignored.
     */
    static fromString(...pathComponents: string[]): ResourcePath;
    static emptyPath(): ResourcePath;
}

/**
 * Executes the given `updateFunction` and then attempts to commit the changes
 * applied within the transaction. If any document read within the transaction
 * has changed, Cloud Firestore retries the `updateFunction`. If it fails to
 * commit after 5 attempts, the transaction fails.
 *
 * The maximum number of writes allowed in a single transaction is 500.
 *
 * @param firestore - A reference to the Firestore database to run this
 * transaction against.
 * @param updateFunction - The function to execute within the transaction
 * context.
 * @returns If the transaction completed successfully or was explicitly aborted
 * (the `updateFunction` returned a failed promise), the promise returned by the
 * `updateFunction `is returned here. Otherwise, if the transaction failed, a
 * rejected promise with the corresponding failure error is returned.
 */
export declare function runTransaction<T>(firestore: FirebaseFirestore, updateFunction: (transaction: Transaction) => Promise<T>): Promise<T>;

/**
 * Returns a sentinel used with {@link setDoc} or {@link updateDoc} to
 * include a server-generated timestamp in the written data.
 */
export declare function serverTimestamp(): FieldValue;

declare type ServerTimestampBehavior = 'estimate' | 'previous' | 'none';

/**
 * Writes to the document referred to by this `DocumentReference`. If the
 * document does not yet exist, it will be created.
 *
 * @param reference - A reference to the document to write.
 * @param data - A map of the fields and values for the document.
 * @returns A Promise resolved once the data has been successfully written
 * to the backend (note that it won't resolve while you're offline).
 */
export declare function setDoc<T>(reference: DocumentReference<T>, data: T): Promise<void>;

/**
 * Writes to the document referred to by the specified `DocumentReference`. If
 * the document does not yet exist, it will be created. If you provide `merge`
 * or `mergeFields`, the provided data can be merged into an existing document.
 *
 * @param reference - A reference to the document to write.
 * @param data - A map of the fields and values for the document.
 * @param options - An object to configure the set behavior.
 * @returns A Promise resolved once the data has been successfully written
 * to the backend (note that it won't resolve while you're offline).
 */
export declare function setDoc<T>(reference: DocumentReference<T>, data: Partial<T>, options: SetOptions): Promise<void>;

/**
 * Sets the verbosity of Cloud Firestore logs (debug, error, or silent).
 *
 * @param logLevel - The verbosity you set for activity and error logging. Can
 *   be any of the following values:
 *
 *   <ul>
 *     <li>`debug` for the most verbose logging level, primarily for
 *     debugging.</li>
 *     <li>`error` to log errors only.</li>
 *     <li><code>`silent` to turn off logging.</li>
 *   </ul>
 */
export declare function setLogLevel(logLevel: LogLevel): void;

/**
 * An options object that configures the behavior of {@link setDoc}, {@link
 * WriteBatch#set} and {@link Transaction#set} calls. These calls can be
 * configured to perform granular merges instead of overwriting the target
 * documents in their entirety by providing a `SetOptions` with `merge: true`.
 *
 * @param merge - Changes the behavior of a `setDoc()` call to only replace the
 * values specified in its data argument. Fields omitted from the `setDoc()`
 * call remain untouched.
 * @param mergeFields - Changes the behavior of `setDoc()` calls to only replace
 * the specified field paths. Any field path that is not specified is ignored
 * and remains untouched.
 */
export declare type SetOptions = {
    readonly merge?: boolean;
} | {
    readonly mergeFields?: Array<string | FieldPath>;
};

export declare interface Settings extends Settings_2 {
    cacheSizeBytes?: number;
}

declare interface Settings_2 {
    host?: string;
    ssl?: boolean;
    ignoreUndefinedProperties?: boolean;
    cacheSizeBytes?: number;
    experimentalForceLongPolling?: boolean;
    experimentalAutoDetectLongPolling?: boolean;
}

/**
 * A `SharedClientState` keeps track of the global state of the mutations
 * and query targets for all active clients with the same persistence key (i.e.
 * project ID and FirebaseApp name). It relays local changes to other clients
 * and updates its local state as new state is observed.
 *
 * `SharedClientState` is primarily used for synchronization in Multi-Tab
 * environments. Each tab is responsible for registering its active query
 * targets and mutations. `SharedClientState` will then notify the listener
 * assigned to `.syncEngine` for updates to mutations and queries that
 * originated in other clients.
 *
 * To receive notifications, `.syncEngine` and `.onlineStateHandler` has to be
 * assigned before calling `start()`.
 */
declare interface SharedClientState {
    onlineStateHandler: ((onlineState: OnlineState) => void) | null;
    sequenceNumberHandler: ((sequenceNumber: ListenSequenceNumber) => void) | null;
    /** Registers the Mutation Batch ID of a newly pending mutation. */
    addPendingMutation(batchId: BatchId): void;
    /**
     * Records that a pending mutation has been acknowledged or rejected.
     * Called by the primary client to notify secondary clients of mutation
     * results as they come back from the backend.
     */
    updateMutationState(batchId: BatchId, state: 'acknowledged' | 'rejected', error?: FirestoreError): void;
    /**
     * Associates a new Query Target ID with the local Firestore client. Returns
     * the new query state for the query (which can be 'current' if the query is
     * already associated with another tab).
     *
     * If the target id is already associated with local client, the method simply
     * returns its `QueryTargetState`.
     */
    addLocalQueryTarget(targetId: TargetId): QueryTargetState;
    /** Removes the Query Target ID association from the local client. */
    removeLocalQueryTarget(targetId: TargetId): void;
    /** Checks whether the target is associated with the local client. */
    isLocalQueryTarget(targetId: TargetId): boolean;
    /**
     * Processes an update to a query target.
     *
     * Called by the primary client to notify secondary clients of document
     * changes or state transitions that affect the provided query target.
     */
    updateQueryState(targetId: TargetId, state: QueryTargetState, error?: FirestoreError): void;
    /**
     * Removes the target's metadata entry.
     *
     * Called by the primary client when all clients stopped listening to a query
     * target.
     */
    clearQueryState(targetId: TargetId): void;
    /**
     * Gets the active Query Targets IDs for all active clients.
     *
     * The implementation for this may require O(n) runtime, where 'n' is the size
     * of the result set.
     */
    getAllActiveQueryTargets(): SortedSet<TargetId>;
    /**
     * Checks whether the provided target ID is currently being listened to by
     * any of the active clients.
     *
     * The implementation may require O(n*log m) runtime, where 'n' is the number
     * of clients and 'm' the number of targets.
     */
    isActiveQueryTarget(targetId: TargetId): boolean;
    /**
     * Starts the SharedClientState, reads existing client data and registers
     * listeners for updates to new and existing clients.
     */
    start(): Promise<void>;
    /** Shuts down the `SharedClientState` and its listeners. */
    shutdown(): void;
    /**
     * Changes the active user and removes all existing user-specific data. The
     * user change does not call back into SyncEngine (for example, no mutations
     * will be marked as removed).
     */
    handleUserChange(user: User, removedBatchIds: BatchId[], addedBatchIds: BatchId[]): void;
    /** Changes the shared online state of all clients. */
    setOnlineState(onlineState: OnlineState): void;
    writeSequenceNumber(sequenceNumber: ListenSequenceNumber): void;
    /**
     * Notifies other clients when remote documents have changed due to loading
     * a bundle.
     */
    notifyBundleLoaded(): void;
}

/**
 * Returns true if the provided snapshots are equal.
 *
 * @param left - A snapshot to compare.
 * @param right - A snapshot to compare.
 * @returns true if the snapshots are equal.
 */
export declare function snapshotEqual<T>(left: DocumentSnapshot<T> | QuerySnapshot<T>, right: DocumentSnapshot<T> | QuerySnapshot<T>): boolean;

/**
 * An options object that can be passed to {@link onSnapshot} and {@link
 * QuerySnapshot#docChanges} to control which types of changes to include in the
 * result set.
 */
export declare interface SnapshotListenOptions {
    /**
     * Include a change even if only the metadata of the query or of a document
     * changed. Default is false.
     */
    readonly includeMetadataChanges?: boolean;
}

/**
 * Metadata about a snapshot, describing the state of the snapshot.
 */
export declare class SnapshotMetadata {
    /**
     * True if the snapshot contains the result of local writes (for example
     * `set()` or `update()` calls) that have not yet been committed to the
     * backend. If your listener has opted into metadata updates (via
     * `SnapshotListenOptions`) you will receive another snapshot with
     * `hasPendingWrites` equal to false once the writes have been committed to
     * the backend.
     */
    readonly hasPendingWrites: boolean;
    /**
     * True if the snapshot was created from cached data rather than guaranteed
     * up-to-date server data. If your listener has opted into metadata updates
     * (via `SnapshotListenOptions`) you will receive another snapshot with
     * `fromCache` set to false once the client has received up-to-date data from
     * the backend.
     */
    readonly fromCache: boolean;
    /** @hideconstructor */
    constructor(hasPendingWrites: boolean, fromCache: boolean);
    /**
     * Returns true if this `SnapshotMetadata` is equal to the provided one.
     *
     * @param other - The `SnapshotMetadata` to compare against.
     * @returns true if this `SnapshotMetadata` is equal to the provided one.
     */
    isEqual(other: SnapshotMetadata): boolean;
}

/**
 * Options that configure how data is retrieved from a `DocumentSnapshot` (for
 * example the desired behavior for server timestamps that have not yet been set
 * to their final value).
 */
export declare interface SnapshotOptions {
    /**
     * If set, controls the return value for server timestamps that have not yet
     * been set to their final value.
     *
     * By specifying 'estimate', pending server timestamps return an estimate
     * based on the local clock. This estimate will differ from the final value
     * and cause these values to change once the server result becomes available.
     *
     * By specifying 'previous', pending timestamps will be ignored and return
     * their previous value instead.
     *
     * If omitted or set to 'none', `null` will be returned by default until the
     * server value becomes available.
     */
    readonly serverTimestamps?: 'estimate' | 'previous' | 'none';
}

/**
 * A version of a document in Firestore. This corresponds to the version
 * timestamp, such as update_time or read_time.
 */
declare class SnapshotVersion {
    private timestamp;
    static fromTimestamp(value: Timestamp): SnapshotVersion;
    static min(): SnapshotVersion;
    private constructor();
    compareTo(other: SnapshotVersion): number;
    isEqual(other: SnapshotVersion): boolean;
    /** Returns a number representation of the version for use in spec tests. */
    toMicroseconds(): number;
    toString(): string;
    toTimestamp(): Timestamp;
}

declare class SortedMap<K, V> {
    comparator: Comparator<K>;
    root: LLRBNode<K, V> | LLRBEmptyNode<K, V>;
    constructor(comparator: Comparator<K>, root?: LLRBNode<K, V> | LLRBEmptyNode<K, V>);
    insert(key: K, value: V): SortedMap<K, V>;
    remove(key: K): SortedMap<K, V>;
    get(key: K): V | null;
    indexOf(key: K): number;
    isEmpty(): boolean;
    get size(): number;
    minKey(): K | null;
    maxKey(): K | null;
    inorderTraversal<T>(action: (k: K, v: V) => T): T;
    forEach(fn: (k: K, v: V) => void): void;
    toString(): string;
    reverseTraversal<T>(action: (k: K, v: V) => T): T;
    getIterator(): SortedMapIterator<K, V>;
    getIteratorFrom(key: K): SortedMapIterator<K, V>;
    getReverseIterator(): SortedMapIterator<K, V>;
    getReverseIteratorFrom(key: K): SortedMapIterator<K, V>;
}

declare class SortedMapIterator<K, V> {
    private isReverse;
    private nodeStack;
    constructor(node: LLRBNode<K, V> | LLRBEmptyNode<K, V>, startKey: K | null, comparator: Comparator<K>, isReverse: boolean);
    getNext(): Entry<K, V>;
    hasNext(): boolean;
    peek(): Entry<K, V> | null;
}

/**
 * SortedSet is an immutable (copy-on-write) collection that holds elements
 * in order specified by the provided comparator.
 *
 * NOTE: if provided comparator returns 0 for two elements, we consider them to
 * be equal!
 */
declare class SortedSet<T> {
    private comparator;
    private data;
    constructor(comparator: (left: T, right: T) => number);
    has(elem: T): boolean;
    first(): T | null;
    last(): T | null;
    get size(): number;
    indexOf(elem: T): number;
    /** Iterates elements in order defined by "comparator" */
    forEach(cb: (elem: T) => void): void;
    /** Iterates over `elem`s such that: range[0] &lt;= elem &lt; range[1]. */
    forEachInRange(range: [T, T], cb: (elem: T) => void): void;
    /**
     * Iterates over `elem`s such that: start &lt;= elem until false is returned.
     */
    forEachWhile(cb: (elem: T) => boolean, start?: T): void;
    /** Finds the least element greater than or equal to `elem`. */
    firstAfterOrEqual(elem: T): T | null;
    getIterator(): SortedSetIterator<T>;
    getIteratorFrom(key: T): SortedSetIterator<T>;
    /** Inserts or updates an element */
    add(elem: T): SortedSet<T>;
    /** Deletes an element */
    delete(elem: T): SortedSet<T>;
    isEmpty(): boolean;
    unionWith(other: SortedSet<T>): SortedSet<T>;
    isEqual(other: SortedSet<T>): boolean;
    toArray(): T[];
    toString(): string;
    private copy;
}

declare class SortedSetIterator<T> {
    private iter;
    constructor(iter: SortedMapIterator<T, boolean>);
    getNext(): T;
    hasNext(): boolean;
}

/**
 * Creates a `QueryConstraint` that modifies the result set to start after the
 * provided document (exclusive). The starting position is relative to the order
 * of the query. The document must contain all of the fields provided in the
 * orderBy of the query.
 *
 * @param snapshot - The snapshot of the document to start after.
 * @returns A `QueryConstraint` to pass to `query()`
 */
export declare function startAfter(snapshot: DocumentSnapshot_2<unknown>): QueryConstraint;

/**
 * Creates a `QueryConstraint` that modifies the result set to start after the
 * provided fields relative to the order of the query. The order of the field
 * values must match the order of the order by clauses of the query.
 *
 * @param fieldValues - The field values to start this query after, in order
 * of the query's order by.
 * @returns A `QueryConstraint` to pass to `query()`
 */
export declare function startAfter(...fieldValues: unknown[]): QueryConstraint;

/**
 * Creates a `QueryConstraint` that modifies the result set to start at the
 * provided document (inclusive). The starting position is relative to the order
 * of the query. The document must contain all of the fields provided in the
 * `orderBy` of this query.
 *
 * @param snapshot - The snapshot of the document to start at.
 * @returns A `QueryConstraint` to pass to `query()`.
 */
export declare function startAt(snapshot: DocumentSnapshot_2<unknown>): QueryConstraint;

/**
 * Creates a `QueryConstraint` that modifies the result set to start at the
 * provided fields relative to the order of the query. The order of the field
 * values must match the order of the order by clauses of the query.
 *
 * @param fieldValues - The field values to start this query at, in order
 * of the query's order by.
 * @returns A `QueryConstraint` to pass to `query()`.
 */
export declare function startAt(...fieldValues: unknown[]): QueryConstraint;

declare type StructuredQuery = firestoreV1ApiClientInterfaces.StructuredQuery;

/**
 * @license
 * Copyright 2017 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.
 */
/**
 * SyncEngine is the central controller in the client SDK architecture. It is
 * the glue code between the EventManager, LocalStore, and RemoteStore. Some of
 * SyncEngine's responsibilities include:
 * 1. Coordinating client requests and remote events between the EventManager
 *    and the local and remote data stores.
 * 2. Managing a View object for each query, providing the unified view between
 *    the local and remote data stores.
 * 3. Notifying the RemoteStore when the LocalStore has new mutations in its
 *    queue that need sending to the backend.
 *
 * The SyncEngine’s methods should only ever be called by methods running in the
 * global async queue.
 *
 * PORTING NOTE: On Web, SyncEngine does not have an explicit subscribe()
 * function. Instead, it directly depends on EventManager's tree-shakeable API
 * (via `ensureWatchStream()`).
 */
declare interface SyncEngine {
    isPrimaryClient: boolean;
}

/**
 * A Target represents the WatchTarget representation of a Query, which is used
 * by the LocalStore and the RemoteStore to keep track of and to execute
 * backend queries. While a Query can represent multiple Targets, each Targets
 * maps to a single WatchTarget in RemoteStore and a single TargetData entry
 * in persistence.
 */
declare interface Target {
    readonly path: ResourcePath;
    readonly collectionGroup: string | null;
    readonly orderBy: OrderBy[];
    readonly filters: Filter[];
    readonly limit: number | null;
    readonly startAt: Bound | null;
    readonly endAt: Bound | null;
}

/**
 * Represents cached targets received from the remote backend.
 *
 * The cache is keyed by `Target` and entries in the cache are `TargetData`
 * instances.
 */
declare interface TargetCache {
    /**
     * A global snapshot version representing the last consistent snapshot we
     * received from the backend. This is monotonically increasing and any
     * snapshots received from the backend prior to this version (e.g. for targets
     * resumed with a resume_token) should be suppressed (buffered) until the
     * backend has caught up to this snapshot version again. This prevents our
     * cache from ever going backwards in time.
     *
     * This is updated whenever our we get a TargetChange with a read_time and
     * empty target_ids.
     */
    getLastRemoteSnapshotVersion(transaction: PersistenceTransaction): PersistencePromise<SnapshotVersion>;
    /**
     * @returns The highest sequence number observed, including any that might be
     *         persisted on-disk.
     */
    getHighestSequenceNumber(transaction: PersistenceTransaction): PersistencePromise<ListenSequenceNumber>;
    /**
     * Call provided function with each `TargetData` that we have cached.
     */
    forEachTarget(txn: PersistenceTransaction, f: (q: TargetData) => void): PersistencePromise<void>;
    /**
     * Set the highest listen sequence number and optionally updates the
     * snapshot version of the last consistent snapshot received from the backend
     * (see getLastRemoteSnapshotVersion() for more details).
     *
     * @param highestListenSequenceNumber - The new maximum listen sequence number.
     * @param lastRemoteSnapshotVersion - The new snapshot version. Optional.
     */
    setTargetsMetadata(transaction: PersistenceTransaction, highestListenSequenceNumber: number, lastRemoteSnapshotVersion?: SnapshotVersion): PersistencePromise<void>;
    /**
     * Adds an entry in the cache.
     *
     * The cache key is extracted from `targetData.target`. The key must not already
     * exist in the cache.
     *
     * @param targetData - A TargetData instance to put in the cache.
     */
    addTargetData(transaction: PersistenceTransaction, targetData: TargetData): PersistencePromise<void>;
    /**
     * Updates an entry in the cache.
     *
     * The cache key is extracted from `targetData.target`. The entry must already
     * exist in the cache, and it will be replaced.
     * @param targetData - The TargetData to be replaced into the cache.
     */
    updateTargetData(transaction: PersistenceTransaction, targetData: TargetData): PersistencePromise<void>;
    /**
     * Removes the cached entry for the given target data. It is an error to remove
     * a target data that does not exist.
     *
     * Multi-Tab Note: This operation should only be called by the primary client.
     */
    removeTargetData(transaction: PersistenceTransaction, targetData: TargetData): PersistencePromise<void>;
    /**
     * The number of targets currently in the cache.
     */
    getTargetCount(transaction: PersistenceTransaction): PersistencePromise<number>;
    /**
     * Looks up a TargetData entry by target.
     *
     * @param target - The query target corresponding to the entry to look up.
     * @returns The cached TargetData entry, or null if the cache has no entry for
     * the target.
     */
    getTargetData(transaction: PersistenceTransaction, target: Target): PersistencePromise<TargetData | null>;
    /**
     * Adds the given document keys to cached query results of the given target
     * ID.
     *
     * Multi-Tab Note: This operation should only be called by the primary client.
     */
    addMatchingKeys(transaction: PersistenceTransaction, keys: DocumentKeySet, targetId: TargetId): PersistencePromise<void>;
    /**
     * Removes the given document keys from the cached query results of the
     * given target ID.
     *
     * Multi-Tab Note: This operation should only be called by the primary client.
     */
    removeMatchingKeys(transaction: PersistenceTransaction, keys: DocumentKeySet, targetId: TargetId): PersistencePromise<void>;
    /**
     * Removes all the keys in the query results of the given target ID.
     *
     * Multi-Tab Note: This operation should only be called by the primary client.
     */
    removeMatchingKeysForTargetId(transaction: PersistenceTransaction, targetId: TargetId): PersistencePromise<void>;
    /**
     * Returns the document keys that match the provided target ID.
     */
    getMatchingKeysForTargetId(transaction: PersistenceTransaction, targetId: TargetId): PersistencePromise<DocumentKeySet>;
    /**
     * Returns a new target ID that is higher than any query in the cache. If
     * there are no queries in the cache, returns the first valid target ID.
     * Allocated target IDs are persisted and `allocateTargetId()` will never
     * return the same ID twice.
     */
    allocateTargetId(transaction: PersistenceTransaction): PersistencePromise<TargetId>;
    containsKey(transaction: PersistenceTransaction, key: DocumentKey): PersistencePromise<boolean>;
}

/**
 * A TargetChange specifies the set of changes for a specific target as part of
 * a RemoteEvent. These changes track which documents are added, modified or
 * removed, as well as the target's resume token and whether the target is
 * marked CURRENT.
 * The actual changes *to* documents are not part of the TargetChange since
 * documents may be part of multiple targets.
 */
declare class TargetChange {
    /**
     * An opaque, server-assigned token that allows watching a query to be resumed
     * after disconnecting without retransmitting all the data that matches the
     * query. The resume token essentially identifies a point in time from which
     * the server should resume sending results.
     */
    readonly resumeToken: ByteString;
    /**
     * The "current" (synced) status of this target. Note that "current"
     * has special meaning in the RPC protocol that implies that a target is
     * both up-to-date and consistent with the rest of the watch stream.
     */
    readonly current: boolean;
    /**
     * The set of documents that were newly assigned to this target as part of
     * this remote event.
     */
    readonly addedDocuments: DocumentKeySet;
    /**
     * The set of documents that were already assigned to this target but received
     * an update during this remote event.
     */
    readonly modifiedDocuments: DocumentKeySet;
    /**
     * The set of documents that were removed from this target as part of this
     * remote event.
     */
    readonly removedDocuments: DocumentKeySet;
    constructor(
    /**
     * An opaque, server-assigned token that allows watching a query to be resumed
     * after disconnecting without retransmitting all the data that matches the
     * query. The resume token essentially identifies a point in time from which
     * the server should resume sending results.
     */
    resumeToken: ByteString, 
    /**
     * The "current" (synced) status of this target. Note that "current"
     * has special meaning in the RPC protocol that implies that a target is
     * both up-to-date and consistent with the rest of the watch stream.
     */
    current: boolean, 
    /**
     * The set of documents that were newly assigned to this target as part of
     * this remote event.
     */
    addedDocuments: DocumentKeySet, 
    /**
     * The set of documents that were already assigned to this target but received
     * an update during this remote event.
     */
    modifiedDocuments: DocumentKeySet, 
    /**
     * The set of documents that were removed from this target as part of this
     * remote event.
     */
    removedDocuments: DocumentKeySet);
    /**
     * This method is used to create a synthesized TargetChanges that can be used to
     * apply a CURRENT status change to a View (for queries executed in a different
     * tab) or for new queries (to raise snapshots with correct CURRENT status).
     */
    static createSynthesizedTargetChangeForCurrentChange(targetId: TargetId, current: boolean): TargetChange;
}

declare type TargetChangeTargetChangeType = 'NO_CHANGE' | 'ADD' | 'REMOVE' | 'CURRENT' | 'RESET';

/**
 * An immutable set of metadata that the local store tracks for each target.
 */
declare class TargetData {
    /** The target being listened to. */
    readonly target: Target;
    /**
     * The target ID to which the target corresponds; Assigned by the
     * LocalStore for user listens and by the SyncEngine for limbo watches.
     */
    readonly targetId: TargetId;
    /** The purpose of the target. */
    readonly purpose: TargetPurpose;
    /**
     * The sequence number of the last transaction during which this target data
     * was modified.
     */
    readonly sequenceNumber: ListenSequenceNumber;
    /** The latest snapshot version seen for this target. */
    readonly snapshotVersion: SnapshotVersion;
    /**
     * The maximum snapshot version at which the associated view
     * contained no limbo documents.
     */
    readonly lastLimboFreeSnapshotVersion: SnapshotVersion;
    /**
     * An opaque, server-assigned token that allows watching a target to be
     * resumed after disconnecting without retransmitting all the data that
     * matches the target. The resume token essentially identifies a point in
     * time from which the server should resume sending results.
     */
    readonly resumeToken: ByteString;
    constructor(
    /** The target being listened to. */
    target: Target, 
    /**
     * The target ID to which the target corresponds; Assigned by the
     * LocalStore for user listens and by the SyncEngine for limbo watches.
     */
    targetId: TargetId, 
    /** The purpose of the target. */
    purpose: TargetPurpose, 
    /**
     * The sequence number of the last transaction during which this target data
     * was modified.
     */
    sequenceNumber: ListenSequenceNumber, 
    /** The latest snapshot version seen for this target. */
    snapshotVersion?: SnapshotVersion, 
    /**
     * The maximum snapshot version at which the associated view
     * contained no limbo documents.
     */
    lastLimboFreeSnapshotVersion?: SnapshotVersion, 
    /**
     * An opaque, server-assigned token that allows watching a target to be
     * resumed after disconnecting without retransmitting all the data that
     * matches the target. The resume token essentially identifies a point in
     * time from which the server should resume sending results.
     */
    resumeToken?: ByteString);
    /** Creates a new target data instance with an updated sequence number. */
    withSequenceNumber(sequenceNumber: number): TargetData;
    /**
     * Creates a new target data instance with an updated resume token and
     * snapshot version.
     */
    withResumeToken(resumeToken: ByteString, snapshotVersion: SnapshotVersion): TargetData;
    /**
     * Creates a new target data instance with an updated last limbo free
     * snapshot version number.
     */
    withLastLimboFreeSnapshotVersion(lastLimboFreeSnapshotVersion: SnapshotVersion): TargetData;
}

/**
 * A locally-assigned ID used to refer to a target being watched via the
 * Watch service.
 */
declare type TargetId = number;

/** An enumeration of the different purposes we have for targets. */
declare const enum TargetPurpose {
    /** A regular, normal query target. */
    Listen = 0,
    /**
     * The query target was used to refill a query after an existence filter mismatch.
     */
    ExistenceFilterMismatch = 1,
    /** The query target was used to resolve a limbo document. */
    LimboResolution = 2
}

/**
 * Terminates the provided Firestore instance.
 *
 * After calling `terminate()` only the `clearIndexedDbPersistence()` function
 * may be used. Any other function will throw a `FirestoreError`.
 *
 * To restart after termination, create a new instance of FirebaseFirestore with
 * {@link getFirestore}.
 *
 * Termination does not cancel any pending writes, and any promises that are
 * awaiting a response from the server will not be resolved. If you have
 * persistence enabled, the next time you start this instance, it will resume
 * sending these writes to the server.
 *
 * Note: Under normal circumstances, calling `terminate()` is not required. This
 * function is useful only when you want to force this instance to release all
 * of its resources or in combination with `clearIndexedDbPersistence()` to
 * ensure that all local state is destroyed between test runs.
 *
 * @returns A promise that is resolved when the instance has been successfully
 * terminated.
 */
export declare function terminate(firestore: FirebaseFirestore): Promise<void>;

/**
 * Wellknown "timer" IDs used when scheduling delayed operations on the
 * AsyncQueue. These IDs can then be used from tests to check for the presence
 * of operations or to run them early.
 *
 * The string values are used when encoding these timer IDs in JSON spec tests.
 */
declare const enum TimerId {
    /** All can be used with runDelayedOperationsEarly() to run all timers. */
    All = "all",
    /**
     * The following 4 timers are used in persistent_stream.ts for the listen and
     * write streams. The "Idle" timer is used to close the stream due to
     * inactivity. The "ConnectionBackoff" timer is used to restart a stream once
     * the appropriate backoff delay has elapsed.
     */
    ListenStreamIdle = "listen_stream_idle",
    ListenStreamConnectionBackoff = "listen_stream_connection_backoff",
    WriteStreamIdle = "write_stream_idle",
    WriteStreamConnectionBackoff = "write_stream_connection_backoff",
    /**
     * A timer used in online_state_tracker.ts to transition from
     * OnlineState.Unknown to Offline after a set timeout, rather than waiting
     * indefinitely for success or failure.
     */
    OnlineStateTimeout = "online_state_timeout",
    /**
     * A timer used to update the client metadata in IndexedDb, which is used
     * to determine the primary leaseholder.
     */
    ClientMetadataRefresh = "client_metadata_refresh",
    /** A timer used to periodically attempt LRU Garbage collection */
    LruGarbageCollection = "lru_garbage_collection",
    /**
     * A timer used to retry transactions. Since there can be multiple concurrent
     * transactions, multiple of these may be in the queue at a given time.
     */
    TransactionRetry = "transaction_retry",
    /**
     * A timer used to retry operations scheduled via retryable AsyncQueue
     * operations.
     */
    AsyncQueueRetry = "async_queue_retry"
}

/**
 * @license
 * Copyright 2017 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.
 */
/**
 * A `Timestamp` represents a point in time independent of any time zone or
 * calendar, represented as seconds and fractions of seconds at nanosecond
 * resolution in UTC Epoch time.
 *
 * It is encoded using the Proleptic Gregorian Calendar which extends the
 * Gregorian calendar backwards to year one. It is encoded assuming all minutes
 * are 60 seconds long, i.e. leap seconds are "smeared" so that no leap second
 * table is needed for interpretation. Range is from 0001-01-01T00:00:00Z to
 * 9999-12-31T23:59:59.999999999Z.
 *
 * @see https://github.com/google/protobuf/blob/master/src/google/protobuf/timestamp.proto
 */
export declare class Timestamp {
    readonly seconds: number;
    readonly nanoseconds: number;
    /**
     * Creates a new timestamp with the current date, with millisecond precision.
     *
     * @returns a new timestamp representing the current date.
     */
    static now(): Timestamp;
    /**
     * Creates a new timestamp from the given date.
     *
     * @param date - The date to initialize the `Timestamp` from.
     * @returns A new `Timestamp` representing the same point in time as the given
     *     date.
     */
    static fromDate(date: Date): Timestamp;
    /**
     * Creates a new timestamp from the given number of milliseconds.
     *
     * @param milliseconds - Number of milliseconds since Unix epoch
     *     1970-01-01T00:00:00Z.
     * @returns A new `Timestamp` representing the same point in time as the given
     *     number of milliseconds.
     */
    static fromMillis(milliseconds: number): Timestamp;
    /**
     * Creates a new timestamp.
     *
     * @param seconds - The number of seconds of UTC time since Unix epoch
     *     1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
     *     9999-12-31T23:59:59Z inclusive.
     * @param nanoseconds - The non-negative fractions of a second at nanosecond
     *     resolution. Negative second values with fractions must still have
     *     non-negative nanoseconds values that count forward in time. Must be
     *     from 0 to 999,999,999 inclusive.
     */
    constructor(seconds: number, nanoseconds: number);
    /**
     * Converts a `Timestamp` to a JavaScript `Date` object. This conversion causes
     * a loss of precision since `Date` objects only support millisecond precision.
     *
     * @returns JavaScript `Date` object representing the same point in time as
     *     this `Timestamp`, with millisecond precision.
     */
    toDate(): Date;
    /**
     * Converts a `Timestamp` to a numeric timestamp (in milliseconds since
     * epoch). This operation causes a loss of precision.
     *
     * @returns The point in time corresponding to this timestamp, represented as
     *     the number of milliseconds since Unix epoch 1970-01-01T00:00:00Z.
     */
    toMillis(): number;
    _compareTo(other: Timestamp): number;
    /**
     * Returns true if this `Timestamp` is equal to the provided one.
     *
     * @param other - The `Timestamp` to compare against.
     * @returns true if this `Timestamp` is equal to the provided one.
     */
    isEqual(other: Timestamp): boolean;
    toString(): string;
    toJSON(): {
        seconds: number;
        nanoseconds: number;
    };
    /**
     * Converts this object to a primitive string, which allows Timestamp objects to be compared
     * using the `>`, `<=`, `>=` and `>` operators.
     */
    valueOf(): string;
}

declare type Timestamp_2 = string | {
    seconds?: string | number;
    nanos?: number;
};

declare interface Token {
    /** Type of token. */
    type: TokenType;
    /**
     * The user with which the token is associated (used for persisting user
     * state on disk, etc.).
     */
    user: User;
    /** Extra header values to be passed along with a request */
    authHeaders: {
        [header: string]: string;
    };
}

declare type TokenType = 'OAuth' | 'FirstParty';

/**
 * A reference to a transaction.
 *
 * The `Transaction` object passed to a transaction's `updateFunction` provides
 * the methods to read and write data within the transaction context. See
 * {@link runTransaction}.
 */
export declare class Transaction extends Transaction_2 {
    protected readonly _firestore: FirebaseFirestore;
    /** @hideconstructor */
    constructor(_firestore: FirebaseFirestore, _transaction: Transaction_3);
    /**
     * Reads the document referenced by the provided {@link DocumentReference}.
     *
     * @param documentRef - A reference to the document to be read.
     * @returns A `DocumentSnapshot` with the read data.
     */
    get<T>(documentRef: DocumentReference<T>): Promise<DocumentSnapshot<T>>;
}

/**
 * A reference to a transaction.
 *
 * The `Transaction` object passed to a transaction's `updateFunction` provides
 * the methods to read and write data within the transaction context. See
 * {@link runTransaction}.
 */
declare class Transaction_2 {
    protected readonly _firestore: FirebaseFirestore_2;
    private readonly _transaction;
    private readonly _dataReader;
    /** @hideconstructor */
    constructor(_firestore: FirebaseFirestore_2, _transaction: Transaction_3);
    /**
     * Reads the document referenced by the provided {@link DocumentReference}.
     *
     * @param documentRef - A reference to the document to be read.
     * @returns A `DocumentSnapshot` with the read data.
     */
    get<T>(documentRef: DocumentReference<T>): Promise<DocumentSnapshot_2<T>>;
    /**
     * Writes to the document referred to by the provided {@link
     * DocumentReference}. If the document does not exist yet, it will be created.
     *
     * @param documentRef - A reference to the document to be set.
     * @param data - An object of the fields and values for the document.
     * @returns This `Transaction` instance. Used for chaining method calls.
     */
    set<T>(documentRef: DocumentReference<T>, data: T): this;
    /**
     * Writes to the document referred to by the provided {@link
     * DocumentReference}. If the document does not exist yet, it will be created.
     * If you provide `merge` or `mergeFields`, the provided data can be merged
     * into an existing document.
     *
     * @param documentRef - A reference to the document to be set.
     * @param data - An object of the fields and values for the document.
     * @param options - An object to configure the set behavior.
     * @returns This `Transaction` instance. Used for chaining method calls.
     */
    set<T>(documentRef: DocumentReference<T>, data: Partial<T>, options: SetOptions): this;
    /**
     * Updates fields in the document referred to by the provided {@link
     * DocumentReference}. The update will fail if applied to a document that does
     * not exist.
     *
     * @param documentRef - A reference to the document to be updated.
     * @param data - An object containing the fields and values with which to
     * update the document. Fields can contain dots to reference nested fields
     * within the document.
     * @returns This `Transaction` instance. Used for chaining method calls.
     */
    update(documentRef: DocumentReference<unknown>, data: UpdateData): this;
    /**
     * Updates fields in the document referred to by the provided {@link
     * DocumentReference}. The update will fail if applied to a document that does
     * not exist.
     *
     * Nested fields can be updated by providing dot-separated field path
     * strings or by providing `FieldPath` objects.
     *
     * @param documentRef - A reference to the document to be updated.
     * @param field - The first field to update.
     * @param value - The first value.
     * @param moreFieldsAndValues - Additional key/value pairs.
     * @returns This `Transaction` instance. Used for chaining method calls.
     */
    update(documentRef: DocumentReference<unknown>, field: string | FieldPath, value: unknown, ...moreFieldsAndValues: unknown[]): this;
    /**
     * Deletes the document referred to by the provided {@link DocumentReference}.
     *
     * @param documentRef - A reference to the document to be deleted.
     * @returns This `Transaction` instance. Used for chaining method calls.
     */
    delete(documentRef: DocumentReference<unknown>): this;
}

/**
 * Internal transaction object responsible for accumulating the mutations to
 * perform and the base versions for any documents read.
 */
declare class Transaction_3 {
    private datastore;
    private readVersions;
    private mutations;
    private committed;
    /**
     * A deferred usage error that occurred previously in this transaction that
     * will cause the transaction to fail once it actually commits.
     */
    private lastWriteError;
    /**
     * Set of documents that have been written in the transaction.
     *
     * When there's more than one write to the same key in a transaction, any
     * writes after the first are handled differently.
     */
    private writtenDocs;
    constructor(datastore: Datastore);
    lookup(keys: DocumentKey[]): Promise<MaybeDocument[]>;
    set(key: DocumentKey, data: ParsedSetData): void;
    update(key: DocumentKey, data: ParsedUpdateData): void;
    delete(key: DocumentKey): void;
    commit(): Promise<void>;
    private recordVersion;
    /**
     * Returns the version of this document when it was read in this transaction,
     * as a precondition, or no precondition if it was not read.
     */
    private precondition;
    /**
     * Returns the precondition for a document if the operation is an update.
     */
    private preconditionForUpdate;
    private write;
    private ensureCommitNotCalled;
}

/** Used to represent a field transform on a mutation. */
declare class TransformOperation {
    private _;
}

declare type UnaryFilterOp = 'OPERATOR_UNSPECIFIED' | 'IS_NAN' | 'IS_NULL' | 'IS_NOT_NAN' | 'IS_NOT_NULL';

export declare interface Unsubscribe {
    (): void;
}

/**
 * An untyped Firestore Data Converter interface that is shared between the
 * lite, firestore-exp and classic SDK.
 */
declare interface UntypedFirestoreDataConverter<T> {
    toFirestore(modelObject: T): DocumentData_2;
    toFirestore(modelObject: Partial<T>, options: SetOptions_2): DocumentData_2;
    fromFirestore(snapshot: unknown, options?: unknown): T;
}

/**
 * Update data (for use with {@link updateDoc}) consists of field paths (e.g.
 * 'foo' or 'foo.baz') mapped to values. Fields that contain dots reference
 * nested fields within the document.
 */
export declare interface UpdateData {
    [fieldPath: string]: any;
}

/**
 * Updates fields in the document referred to by the specified
 * `DocumentReference`. The update will fail if applied to a document that does
 * not exist.
 *
 * @param reference - A reference to the document to update.
 * @param data - An object containing the fields and values with which to
 * update the document. Fields can contain dots to reference nested fields
 * within the document.
 * @returns A Promise resolved once the data has been successfully written
 * to the backend (note that it won't resolve while you're offline).
 */
export declare function updateDoc(reference: DocumentReference<unknown>, data: UpdateData): Promise<void>;

/**
 * Updates fields in the document referred to by the specified
 * `DocumentReference` The update will fail if applied to a document that does
 * not exist.
 *
 * Nested fields can be updated by providing dot-separated field path
 * strings or by providing `FieldPath` objects.
 *
 * @param reference - A reference to the document to update.
 * @param field - The first field to update.
 * @param value - The first value.
 * @param moreFieldsAndValues - Additional key value pairs.
 * @returns A Promise resolved once the data has been successfully written
 * to the backend (note that it won't resolve while you're offline).
 */
export declare function updateDoc(reference: DocumentReference<unknown>, field: string | FieldPath, value: unknown, ...moreFieldsAndValues: unknown[]): Promise<void>;

/**
 * Modify this instance to communicate with the Cloud Firestore emulator.
 *
 * Note: This must be called before this instance has been used to do any
 * operations.
 *
 * @param firestore - The Firestore instance to configure to connect to the
 * emulator.
 * @param host - the emulator host (ex: localhost).
 * @param port - the emulator port (ex: 9000).
 */
export declare function useFirestoreEmulator(firestore: FirebaseFirestore_2, host: string, port: number): void;

/**
 * @license
 * Copyright 2017 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.
 */
/**
 * Simple wrapper around a nullable UID. Mostly exists to make code more
 * readable.
 */
declare class User {
    readonly uid: string | null;
    /** A user with a null UID. */
    static readonly UNAUTHENTICATED: User;
    static readonly GOOGLE_CREDENTIALS: User;
    static readonly FIRST_PARTY: User;
    constructor(uid: string | null);
    isAuthenticated(): boolean;
    /**
     * Returns a key representing this user, suitable for inclusion in a
     * dictionary.
     */
    toKey(): string;
    isEqual(otherUser: User): boolean;
}

declare type Value = firestoreV1ApiClientInterfaces.Value;

declare type ValueNullValue = 'NULL_VALUE';

declare class ViewSnapshot {
    readonly query: Query_2;
    readonly docs: DocumentSet;
    readonly oldDocs: DocumentSet;
    readonly docChanges: DocumentViewChange[];
    readonly mutatedKeys: DocumentKeySet;
    readonly fromCache: boolean;
    readonly syncStateChanged: boolean;
    readonly excludesMetadataChanges: boolean;
    constructor(query: Query_2, docs: DocumentSet, oldDocs: DocumentSet, docChanges: DocumentViewChange[], mutatedKeys: DocumentKeySet, fromCache: boolean, syncStateChanged: boolean, excludesMetadataChanges: boolean);
    /** Returns a view snapshot as if all documents in the snapshot were added. */
    static fromInitialDocuments(query: Query_2, documents: DocumentSet, mutatedKeys: DocumentKeySet, fromCache: boolean): ViewSnapshot;
    get hasPendingWrites(): boolean;
    isEqual(other: ViewSnapshot): boolean;
}

/**
 * Waits until all currently pending writes for the active user have been
 * acknowledged by the backend.
 *
 * The returned Promise resolves immediately if there are no outstanding writes.
 * Otherwise, the Promise waits for all previously issued writes (including
 * those written in a previous app session), but it does not wait for writes
 * that were added after the function is called. If you want to wait for
 * additional writes, call `waitForPendingWrites()` again.
 *
 * Any outstanding `waitForPendingWrites()` Promises are rejected during user
 * changes.
 *
 * @returns A Promise which resolves when all currently pending writes have been
 * acknowledged by the backend.
 */
export declare function waitForPendingWrites(firestore: FirebaseFirestore): Promise<void>;

/**
 * Creates a `QueryConstraint` that enforces that documents must contain the
 * specified field and that the value should satisfy the relation constraint
 * provided.
 *
 * @param fieldPath - The path to compare
 * @param opStr - The operation string (e.g "&lt;", "&lt;=", "==", "&lt;",
 *   "&lt;=", "!=").
 * @param value - The value for comparison
 * @returns The created `Query`.
 */
export declare function where(fieldPath: string | FieldPath, opStr: WhereFilterOp, value: unknown): QueryConstraint;

/**
 * Filter conditions in a {@link where} clause are specified using the
 * strings '&lt;', '&lt;=', '==', '!=', '&gt;=', '&gt;', 'array-contains', 'in',
 * 'array-contains-any', and 'not-in'.
 */
export declare type WhereFilterOp = '<' | '<=' | '==' | '!=' | '>=' | '>' | 'array-contains' | 'in' | 'array-contains-any' | 'not-in';

/**
 * A write batch, used to perform multiple writes as a single atomic unit.
 *
 * A `WriteBatch` object can be acquired by calling {@link writeBatch}. It
 * provides methods for adding writes to the write batch. None of the writes
 * will be committed (or visible locally) until {@link WriteBatch#commit} is
 * called.
 */
export declare class WriteBatch {
    private readonly _firestore;
    private readonly _commitHandler;
    private readonly _dataReader;
    private _mutations;
    private _committed;
    /** @hideconstructor */
    constructor(_firestore: FirebaseFirestore_2, _commitHandler: (m: Mutation[]) => Promise<void>);
    /**
     * Writes to the document referred to by the provided {@link
     * DocumentReference}. If the document does not exist yet, it will be created.
     *
     * @param documentRef - A reference to the document to be set.
     * @param data - An object of the fields and values for the document.
     * @returns This `WriteBatch` instance. Used for chaining method calls.
     */
    set<T>(documentRef: DocumentReference<T>, data: T): WriteBatch;
    /**
     * Writes to the document referred to by the provided {@link
     * DocumentReference}. If the document does not exist yet, it will be created.
     * If you provide `merge` or `mergeFields`, the provided data can be merged
     * into an existing document.
     *
     * @param documentRef - A reference to the document to be set.
     * @param data - An object of the fields and values for the document.
     * @param options - An object to configure the set behavior.
     * @returns This `WriteBatch` instance. Used for chaining method calls.
     */
    set<T>(documentRef: DocumentReference<T>, data: Partial<T>, options: SetOptions): WriteBatch;
    /**
     * Updates fields in the document referred to by the provided {@link
     * DocumentReference}. The update will fail if applied to a document that does
     * not exist.
     *
     * @param documentRef - A reference to the document to be updated.
     * @param data - An object containing the fields and values with which to
     * update the document. Fields can contain dots to reference nested fields
     * within the document.
     * @returns This `WriteBatch` instance. Used for chaining method calls.
     */
    update(documentRef: DocumentReference<unknown>, data: UpdateData): WriteBatch;
    /**
     * Updates fields in the document referred to by this {@link
     * DocumentReference}. The update will fail if applied to a document that does
     * not exist.
     *
     * Nested fields can be update by providing dot-separated field path strings
     * or by providing `FieldPath` objects.
     *
     * @param documentRef - A reference to the document to be updated.
     * @param field - The first field to update.
     * @param value - The first value.
     * @param moreFieldsAndValues - Additional key value pairs.
     * @returns This `WriteBatch` instance. Used for chaining method calls.
     */
    update(documentRef: DocumentReference<unknown>, field: string | FieldPath, value: unknown, ...moreFieldsAndValues: unknown[]): WriteBatch;
    /**
     * Deletes the document referred to by the provided {@link DocumentReference}.
     *
     * @param documentRef - A reference to the document to be deleted.
     * @returns This `WriteBatch` instance. Used for chaining method calls.
     */
    delete(documentRef: DocumentReference<unknown>): WriteBatch;
    /**
     * Commits all of the writes in this write batch as a single atomic unit.
     *
     * The result of these writes will only be reflected in document reads that
     * occur after the returned Promise resolves. If the client is offline, the
     * write fails. If you would like to see local modifications or buffer writes
     * until the client is online, use the full Firestore SDK.
     *
     * @returns A Promise resolved once all of the writes in the batch have been
     * successfully written to the backend as an atomic unit (note that it won't
     * resolve while you're offline).
     */
    commit(): Promise<void>;
    private _verifyNotCommitted;
}

/**
 * Creates a write batch, used for performing multiple writes as a single
 * atomic operation. The maximum number of writes allowed in a single WriteBatch
 * is 500.
 *
 * Unlike transactions, write batches are persisted offline and therefore are
 * preferable when you don't need to condition your writes on read data.
 *
 * @returns A `WriteBatch` that can be used to atomically execute multiple
 * writes.
 */
export declare function writeBatch(firestore: FirebaseFirestore): WriteBatch;

export { }
