import * as mqtt5_packet from '../../common/mqtt5_packet';
import * as mqtt_shared from "../../common/mqtt_shared";
export declare function decodeBoolean(payload: DataView, offset: number): [boolean, number];
export declare function decodeU8(payload: DataView, offset: number): [number, number];
export declare function decodeU16(payload: DataView, offset: number): [number, number];
export declare function decodeU32(payload: DataView, offset: number): [number, number];
export declare function decodeVli(payload: DataView, offset: number): [number, number];
export declare function decodeLengthPrefixedString(payload: DataView, offset: number): [string, number];
export declare function decodeBytes(payload: DataView, offset: number, length: number): [ArrayBufferView, number];
export declare function decodeLengthPrefixedBytes(payload: DataView, offset: number): [ArrayBufferView, number];
export declare function decodeUserProperty(payload: DataView, offset: number, userProperties: Array<mqtt5_packet.UserProperty>): number;
export type DecodingFunction = (firstByte: number, payload: DataView) => mqtt5_packet.IPacket;
export type DecodingFunctionSet = Map<mqtt5_packet.PacketType, DecodingFunction>;
export declare function buildClientDecodingFunctionSet(mode: mqtt_shared.ProtocolMode): DecodingFunctionSet;
/**
 * Decoder implementation.  All failures surface as exceptions and are considered protocol-fatal (the connection
 * must be dropped).
 */
export declare class Decoder {
    private decoders;
    private state;
    private scratchBuffer;
    private scratchView;
    private scratchIndex;
    private remainingLength;
    private firstByte;
    constructor(decoders: DecodingFunctionSet);
    reset(): void;
    decode(data: DataView): Array<mqtt5_packet.IPacket>;
    private _handleFirstByte;
    private _handleRemainingLength;
    private _handlePendingPayload;
    private _decodePacket;
}