import LedgerApp from '@binance-chain/javascript-sdk/lib/ledger/ledger-app';
export declare class BcLedgerBridge {
    private app;
    private transport;
    constructor();
    addEventListeners(): void;
    sendMessageToExtension(msg: any): void;
    makeApp(): Promise<void>;
    cleanUp(): void;
    unlock(replyAction: any, hdPath: string, hrp: string): Promise<void>;
    signTransaction(replyAction: string, hdPath: string, tx: any, hrp?: string): Promise<void>;
    mustHaveApp(): LedgerApp;
    getPublicKey(hdPath: number[]): Promise<string>;
    getAddressByHdPath(hdPath: number[], hrp: string): Promise<string>;
    private _toPathArray;
    ledgerErrToMessage(err: any): any;
}