import { ExtensionErrorKind } from './extensionProtocol';
export declare class ExtensionRpcError extends Error {
    kind: ExtensionErrorKind;
    constructor(kind: ExtensionErrorKind, message: string);
}
export type ExtensionApiResponse = {
    status: number;
    statusText: string;
    headers: Record<string, string | null>;
    body: string;
};
type ExtensionReply = {
    id: string;
    response?: ExtensionApiResponse;
    error?: {
        kind: ExtensionErrorKind;
        message: string;
    };
};
export type ScreenshotUploadReply = {
    response: ExtensionApiResponse;
    width: number;
    height: number;
};
export declare const RELAY_DISCOVERY_TIMEOUT_MS = 3000;
type RequestProps = {
    type: string;
    replyType: string;
    payload?: Record<string, unknown>;
    timeoutMs?: number;
    progressType?: string;
    onProgress?: () => void;
};
export declare function requestFromExtension<T extends ExtensionReply>({ type, replyType, payload, timeoutMs, progressType, onProgress, }: RequestProps): Promise<T>;
/**
 * Asks the extension to capture the tab and upload the image itself. `onCaptured` fires as soon as the capture is
 * done, before the upload finishes, so the page can put itself back the way it was.
 */
export declare function uploadScreenshotViaExtension(onCaptured: () => void): Promise<ScreenshotUploadReply>;
export {};