/*!
 * Copyright (c) Microsoft Corporation and contributors. All rights reserved.
 * Licensed under the MIT License.
 */
/**
 * Converts a Uint8Array to a string of the provided encoding
 * Useful when the array might be an {@link IsoBuffer}.
 *
 * @param arr - The array to convert.
 * @param encoding - Optional target encoding; only "utf8" and "base64" are
 * supported, with "utf8" being default.
 * @returns The converted string.
 *
 * @deprecated Moved to the `@fluidframework-internal/client-utils` package.
 */
export declare function Uint8ArrayToString(arr: Uint8Array, encoding?: string): string;
/**
 * Converts a {@link https://en.wikipedia.org/wiki/Base64 | base64} or
 * {@link https://en.wikipedia.org/wiki/UTF-8 | utf-8} string to array buffer.
 *
 * @param encoding - The input string's encoding.
 *
 * @deprecated Moved to the `@fluidframework-internal/client-utils` package.
 */
export declare const stringToBuffer: (input: string, encoding: string) => ArrayBufferLike;
/**
 * Convert binary blob to string format
 *
 * @param blob - the binary blob
 * @param encoding - output string's encoding
 * @returns the blob in string format
 *
 * @deprecated Moved to the `@fluidframework-internal/client-utils` package.
 */
export declare const bufferToString: (blob: ArrayBufferLike, encoding: string) => string;
/**
 * Determines if an object is an array buffer.
 *
 * @remarks Will detect and reject TypedArrays, like Uint8Array.
 * Reason - they can be viewport into Array, they can be accepted, but caller has to deal with
 * math properly (i.e. Take into account byteOffset at minimum).
 * For example, construction of new TypedArray can be in the form of new TypedArray(typedArray) or
 * new TypedArray(buffer, byteOffset, length), but passing TypedArray will result in fist path (and
 * ignoring byteOffice, length).
 *
 * @param obj - The object to determine if it is an ArrayBuffer.
 *
 * @deprecated Moved to the `@fluidframework-internal/client-utils` package.
 */
export declare function isArrayBuffer(obj: any): obj is ArrayBuffer;
/**
 * Minimal implementation of Buffer for our usages in the browser environment.
 *
 * @deprecated Moved to the `@fluidframework-internal/client-utils` package.
 */
export declare class IsoBuffer extends Uint8Array {
    /**
     * Convert the buffer to a string.
     * Only supports encoding the whole string (unlike the Node Buffer equivalent)
     * and only utf8 and base64 encodings.
     *
     * @param encoding - The encoding to use.
     */
    toString(encoding?: string): string;
    /**
     * @param value - (string | ArrayBuffer)
     * @param encodingOrOffset - (string | number)
     * @param length - (number)
     */
    static from(value: any, encodingOrOffset?: any, length?: any): IsoBuffer;
    static fromArrayBuffer(arrayBuffer: ArrayBuffer, byteOffset?: number, byteLength?: number): IsoBuffer;
    static fromString(str: string, encoding?: string): IsoBuffer;
    static isBuffer(obj: any): boolean;
    /**
     * Sanitize a base64 string to provide to base64-js library.
     * {@link https://www.npmjs.com/package/base64-js} is not as tolerant of the same malformed base64 as Node'
     * Buffer is.
     */
    private static sanitizeBase64;
}
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