import { HeaderType } from './common';
export interface WebSocketPolyfill {
    _websocketOpen(protocol: string): void;
    _websocketClosed(code: number, reason: string, wasClean: boolean): void;
    _websocketMessage(message: string | ArrayBuffer): void;
    _websocketFailed(message: string): void;
}
export declare abstract class NativeBridgeDefinition {
    protected ws: WebSocketPolyfill;
    handleThreading: boolean;
    constructor(ws: WebSocketPolyfill);
    abstract connect(url: string, protocols: string | string[], headers: HeaderType): void;
    abstract send(data: string | ArrayBuffer | ArrayBufferView | Blob): void;
    abstract closeWithCodeReason(statusCode: number, closeReason: string): void;
    abstract sendPing(): void;
}