/**
 * @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.
 */
import { ByteString } from '../util/byte_string';
import { Property } from '../util/json_validation';
/**
 * 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;
    static _jsonSchemaVersion: string;
    static _jsonSchema: {
        type: Property<"string">;
        bytes: Property<"string">;
    };
    /**
     * Returns a JSON-serializable representation of this `Bytes` instance.
     *
     * @returns a JSON representation of this object.
     */
    toJSON(): object;
    /**
     * Builds a `Bytes` instance from a JSON object created by {@link Bytes.toJSON}.
     *
     * @param json - a JSON object represention of a `Bytes` instance
     * @returns an instance of {@link Bytes} if the JSON object could be parsed. Throws a
     * {@link FirestoreError} if an error occurs.
     */
    static fromJSON(json: object): Bytes;
}