import { ExternalStorage } from '../types/external-storage';
import { WidgetCompanionDefaultLayoutU, WidgetConfig, WidgetSidebarModeU } from '../types/widget-config';
import { WidgetSidebarSideResolvedU } from '../utils/companion-layout';
export declare class StorageCtx {
    private storage;
    private config;
    private KEYS;
    constructor({ storage, config, }: {
        storage: ExternalStorage;
        config: WidgetConfig;
    });
    setContactToken: (token: string) => Promise<void>;
    getContactToken: () => Promise<string | null>;
    clearContactToken: () => Promise<void>;
    /**
     * The conversation the visitor was last in. Only a POINTER lives here — the
     * messages themselves are on the backend — but without it a page reload
     * drops the visitor into an empty composer beside a conversation that is
     * still very much alive.
     */
    private activeSessionKey;
    getActiveSessionId: () => Promise<string | null>;
    setActiveSessionId: (sessionId: string) => Promise<void>;
    clearActiveSessionId: () => Promise<void>;
    setExternalContactId: (id: string) => Promise<void>;
    getExternalContactId: () => Promise<string | null>;
    private companionKey;
    private getFiniteNumber;
    getCompanionPillOffsetX: () => Promise<number | null>;
    setCompanionPillOffsetX: (offset: number) => Promise<void>;
    getCompanionSidebarWidth: () => Promise<number | null>;
    setCompanionSidebarWidth: (width: number) => Promise<void>;
    /**
     * The visitor's own sidebar side/mode, once they have picked one in the
     * layout menu. Absent until then, so `companion.sidebar.*` config keeps
     * deciding for a visitor who never touched the control. Unrecognized stored
     * values read as absent rather than poisoning the layout.
     */
    getCompanionSidebarSide: () => Promise<WidgetSidebarSideResolvedU | null>;
    setCompanionSidebarSide: (side: WidgetSidebarSideResolvedU) => Promise<void>;
    /**
     * The RESTING layout the visitor last picked in the layout menu. Absent
     * until they pick one, so `companion.defaultLayout` keeps deciding for a
     * visitor who never touched the control.
     *
     * `fullscreen` is deliberately unstorable: it is a mode the visitor enters
     * on top of a resting layout (Escape drops back out of it), so persisting
     * it would reopen every future visit full-screen over the host page.
     */
    getCompanionLayout: () => Promise<WidgetCompanionDefaultLayoutU | null>;
    setCompanionLayout: (layout: WidgetCompanionDefaultLayoutU) => Promise<void>;
    getCompanionSidebarMode: () => Promise<WidgetSidebarModeU | null>;
    setCompanionSidebarMode: (mode: WidgetSidebarModeU) => Promise<void>;
}
//# sourceMappingURL=storage.ctx.d.ts.map