/**
 * A lightweight buffer implementation that have limited functionalities include
 * basic data reading and writing in lightweight usage.
 *
 */
export declare class DataBuffer {
    readonly buffer: Uint8Array;
    private constructor();
    get length(): number;
    get byteLength(): number;
    static isDataBuffer(obj: any): obj is DataBuffer;
    /**
     * When running in a nodejs context, the backing store for the returned `DataBuffer` instance
     * might use a nodejs Buffer allocated from node's Buffer pool, which is not transferable.
     */
    static alloc(byteLength: number): DataBuffer;
    /**
     * When running in a nodejs context, if `actual` is not a nodejs Buffer, the backing store for
     * the returned `DataBuffer` instance might use a nodejs Buffer allocated from node's Buffer pool,
     * which is not transferable.
     */
    static wrap(actual: Uint8Array): DataBuffer;
    /**
     * When running in a nodejs context, the backing store for the returned `DataBuffer` instance
     * might use a nodejs Buffer allocated from node's Buffer pool, which is not transferable.
     */
    static fromString(source: string, options?: {
        dontUseNodeBuffer?: boolean;
    }): DataBuffer;
    /**
     * When running in a nodejs context, the backing store for the returned `DataBuffer` instance
     * might use a nodejs Buffer allocated from node's Buffer pool, which is not transferable.
     */
    static fromByteArray(source: number[]): DataBuffer;
    /**
     * When running in a nodejs context, the backing store for the returned `DataBuffer` instance
     * might use a nodejs Buffer allocated from node's Buffer pool, which is not transferable.
     */
    static concat(buffers: DataBuffer[], totalLength?: number): DataBuffer;
    /**
     * When running in a nodejs context, the backing store for the returned `DataBuffer` instance
     * might use a nodejs Buffer allocated from node's Buffer pool, which is not transferable.
     */
    clone(): DataBuffer;
    toString(): string;
    slice(start?: number, end?: number): DataBuffer;
    set(array: DataBuffer | Uint8Array | ArrayBuffer | ArrayBufferView, offset?: number): void;
    copy(target: DataBuffer, targetStart?: number, start?: number, end?: number): number;
    indexOf(val: string | number | DataBuffer, byteOffset: number, encoding?: string): number;
    lastIndexOf(val: string | number | DataBuffer, byteOffset: number, encoding?: string): number;
    readUInt32BE(offset: number): number;
    writeUInt32BE(value: number, offset: number): void;
    readUInt32LE(offset: number): number;
    writeUInt32LE(value: number, offset: number): void;
    readUInt16LE(offset: number): number;
    writeUInt16LE(value: number, offset: number): void;
    readUInt16BE(offset: number): number;
    writeUInt16BE(value: number, offset: number): void;
    readUInt8(offset: number): number;
    writeUInt8(value: number, offset: number): void;
}
export declare function readUInt16BE(source: Uint8Array, offset: number): number;
export declare function writeUInt16BE(destination: Uint8Array, value: number, offset: number): void;
export declare function readUInt16LE(source: Uint8Array, offset: number): number;
export declare function writeUInt16LE(destination: Uint8Array, value: number, offset: number): void;
export declare function readUInt32BE(source: Uint8Array, offset: number): number;
export declare function writeUInt32BE(destination: Uint8Array, value: number, offset: number): void;
export declare function readUInt32LE(source: Uint8Array, offset: number): number;
export declare function writeUInt32LE(destination: Uint8Array, value: number, offset: number): void;
export declare function readUInt8(source: Uint8Array, offset: number): number;
export declare function writeUInt8(destination: Uint8Array, value: number, offset: number): void;
/** Decodes base64 to a uint8 array. URL-encoded and unpadded base64 is allowed. */
export declare function decodeBase64(encoded: string): DataBuffer;
/** Encodes a buffer to a base64 string. */
export declare function encodeBase64({ buffer }: DataBuffer, padded?: boolean, urlSafe?: boolean): string;