export declare const Sip: any;
interface Callbacks {
    onConnectionRequested?: () => void;
    onCallRequested?: () => void;
    onCallRinging?: () => void;
    onCallConnected?: () => void;
    onCallStreamsRunning?: () => void;
    onCallPaused?: () => void;
    onCallPausedByRemote?: () => void;
    onCallUpdating?: () => void;
    onCallUpdatedByRemote?: () => void;
    onCallReleased?: () => void;
    onCallError?: () => void;
    onLogin?: (username?: string) => void;
    onLogout?: (username: string) => void;
    onAuthenticationError?: (username: string) => void;
}
export declare function multiply(a: number, b: number): Promise<number>;
export declare function login(username: string, password: string, domain: string): Promise<void>;
export declare type DtmfChar = '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9' | '0' | '*' | '#';
declare type SipCall = {
    call: (remoteUri: string) => Promise<void>;
    hangup: () => Promise<void>;
    sendDtmf: (dtmf: DtmfChar) => Promise<void>;
};
export declare function useCall(callbacks?: Callbacks): SipCall;
declare type AudioDevice = 'bluetooth' | 'phone' | 'loudspeaker';
interface AudioDevices {
    options: {
        [device in AudioDevice]: boolean;
    };
    current: AudioDevice;
}
export declare function useAudioDevices(): [
    AudioDevices,
    (device: AudioDevice) => Promise<boolean>
];
export declare function useMicrophone(): [boolean, () => Promise<boolean>];
export {};