/**
 * Protocol constants for the SignalWire RELAY calling API.
 */
export declare const PROTOCOL_VERSION: {
    major: number;
    minor: number;
    revision: number;
};
export declare const AGENT_STRING = "@signalwire/sdk-typescript/2.0";
export declare const METHOD_SIGNALWIRE_CONNECT = "signalwire.connect";
export declare const METHOD_SIGNALWIRE_EVENT = "signalwire.event";
export declare const METHOD_SIGNALWIRE_PING = "signalwire.ping";
export declare const METHOD_SIGNALWIRE_DISCONNECT = "signalwire.disconnect";
export declare const METHOD_SIGNALWIRE_RECEIVE = "signalwire.receive";
export declare const METHOD_SIGNALWIRE_UNRECEIVE = "signalwire.unreceive";
export declare const EVENT_AUTHORIZATION_STATE = "signalwire.authorization.state";
export declare const CALL_STATE_CREATED = "created";
export declare const CALL_STATE_RINGING = "ringing";
export declare const CALL_STATE_ANSWERED = "answered";
export declare const CALL_STATE_ENDING = "ending";
export declare const CALL_STATE_ENDED = "ended";
export declare const CALL_STATES: readonly ["created", "ringing", "answered", "ending", "ended"];
export declare const END_REASON_HANGUP = "hangup";
export declare const END_REASON_CANCEL = "cancel";
export declare const END_REASON_BUSY = "busy";
export declare const END_REASON_NO_ANSWER = "noAnswer";
export declare const END_REASON_DECLINE = "decline";
export declare const END_REASON_ERROR = "error";
export declare const END_REASON_ABANDONED = "abandoned";
export declare const END_REASON_MAX_DURATION = "max_duration";
export declare const END_REASON_NOT_FOUND = "not_found";
export declare const CONNECT_STATE_CONNECTING = "connecting";
export declare const CONNECT_STATE_CONNECTED = "connected";
export declare const CONNECT_STATE_DISCONNECTED = "disconnected";
export declare const CONNECT_STATE_FAILED = "failed";
export declare const EVENT_CALL_STATE = "calling.call.state";
export declare const EVENT_CALL_RECEIVE = "calling.call.receive";
export declare const EVENT_CALL_CONNECT = "calling.call.connect";
export declare const EVENT_CALL_PLAY = "calling.call.play";
export declare const EVENT_CALL_COLLECT = "calling.call.collect";
export declare const EVENT_CALL_RECORD = "calling.call.record";
export declare const EVENT_CALL_DETECT = "calling.call.detect";
export declare const EVENT_CALL_FAX = "calling.call.fax";
export declare const EVENT_CALL_TAP = "calling.call.tap";
export declare const EVENT_CALL_SEND_DIGITS = "calling.call.send_digits";
export declare const EVENT_CALL_DIAL = "calling.call.dial";
export declare const EVENT_CALL_REFER = "calling.call.refer";
export declare const EVENT_CALL_DENOISE = "calling.call.denoise";
export declare const EVENT_CALL_PAY = "calling.call.pay";
export declare const EVENT_CALL_QUEUE = "calling.call.queue";
export declare const EVENT_CALL_STREAM = "calling.call.stream";
export declare const EVENT_CALL_ECHO = "calling.call.echo";
export declare const EVENT_CALL_TRANSCRIBE = "calling.call.transcribe";
export declare const EVENT_CALL_HOLD = "calling.call.hold";
export declare const EVENT_CONFERENCE = "calling.conference";
export declare const EVENT_CALLING_ERROR = "calling.error";
export declare const EVENT_MESSAGING_RECEIVE = "messaging.receive";
export declare const EVENT_MESSAGING_STATE = "messaging.state";
export declare const MESSAGE_STATE_QUEUED = "queued";
export declare const MESSAGE_STATE_INITIATED = "initiated";
export declare const MESSAGE_STATE_SENT = "sent";
export declare const MESSAGE_STATE_DELIVERED = "delivered";
export declare const MESSAGE_STATE_UNDELIVERED = "undelivered";
export declare const MESSAGE_STATE_FAILED = "failed";
export declare const MESSAGE_STATE_RECEIVED = "received";
export declare const MESSAGE_TERMINAL_STATES: readonly ["delivered", "undelivered", "failed"];
export declare const PLAY_STATE_PLAYING = "playing";
export declare const PLAY_STATE_PAUSED = "paused";
export declare const PLAY_STATE_FINISHED = "finished";
export declare const PLAY_STATE_ERROR = "error";
export declare const RECORD_STATE_RECORDING = "recording";
export declare const RECORD_STATE_PAUSED = "paused";
export declare const RECORD_STATE_FINISHED = "finished";
export declare const RECORD_STATE_NO_INPUT = "no_input";
export declare const DETECT_TYPE_MACHINE = "machine";
export declare const DETECT_TYPE_FAX = "fax";
export declare const DETECT_TYPE_DIGIT = "digit";
export declare const ROOM_STATE_JOINING = "joining";
export declare const ROOM_STATE_JOIN = "join";
export declare const ROOM_STATE_LEAVING = "leaving";
export declare const ROOM_STATE_LEAVE = "leave";
export declare const RECONNECT_MIN_DELAY = 1;
export declare const RECONNECT_MAX_DELAY = 30;
export declare const RECONNECT_BACKOFF_FACTOR = 2;
export declare const CLIENT_PING_INTERVAL = 30000;
export declare const CLIENT_PING_MAX_FAILURES = 3;
export declare const SERVER_PING_TIMEOUT = 15000;
export declare const REQUEST_TIMEOUT = 30000;
export declare const EXECUTE_QUEUE_MAX = 500;
export declare const DEFAULT_RELAY_HOST = "relay.signalwire.com";