import type { Observable } from "rxjs";
import type { LensSource, Metric, PartialContainer } from "@snap/camera-kit";
import type { Push2WebEvents } from "./Push2Web";
/**
 * @internal
 */
type ExtensionContainer = PartialContainer<{
    lensSources: LensSource[];
    externalMetrics: Observable<Metric>[];
}, {
    externalMetrics: Observable<Metric>[];
}>;
export declare class Push2WebSDKExtension {
    readonly extension: ExtensionContainer;
    groupId: string;
    private lastPushedEnvelope;
    private metricsSubject;
    constructor();
    updateEnvelope(newEnvelope: ArrayBuffer): void;
    reportEvent(events: Push2WebEvents): void;
}
export {};