import type { AccountId } from '../interfaces/runtime';
import BN from 'bn.js';
import { Bytes } from '../primitive/Bytes';
import { u32 } from '../primitive/U32';
export declare const CID_AURA = 1634891105;
export declare const CID_BABE = 1161969986;
export declare const CID_GRPA = 1263424070;
export declare const CID_POW = 1601662832;
/**
 * @name GenericConsensusEngineId
 * @description
 * A 4-byte identifier (actually a [u8; 4]) identifying the engine, e.g. for Aura it would be [b'a', b'u', b'r', b'a']
 */
export declare class GenericConsensusEngineId extends u32 {
    static idToString(input: number | BN): string;
    static stringToId(input: string): number;
    /**
     * @description `true` if the engine matches aura
     */
    get isAura(): boolean;
    /**
     * @description `true` is the engine matches babe
     */
    get isBabe(): boolean;
    /**
     * @description `true` is the engine matches grandpa
     */
    get isGrandpa(): boolean;
    /**
     * @description `true` is the engine matches pow
     */
    get isPow(): boolean;
    private _getAuraAuthor;
    private _getBabeAuthor;
    private _getPowAuthor;
    private _getH160Author;
    /**
     * @description From the input bytes, decode into an author
     */
    extractAuthor(bytes: Bytes, sessionValidators: AccountId[]): AccountId | undefined;
    /**
     * @description Override the default toString to return a 4-byte string
     */
    toString(): string;
}