import type { ChatPreviewRecord, ChatPreviewRevision, ChatPreviewSource } from '@xopcai/gateway-contract';
export declare class ChatPreviewStore {
    create(input: {
        conversationId: string;
        title: string;
        preferredHeight: number;
        sourceHash: string;
        source: ChatPreviewSource;
    }): {
        preview: ChatPreviewRecord;
        revision: ChatPreviewRevision;
    };
    get(id: string): ChatPreviewRecord | null;
    getRevision(id: string, sourceHash: string): ChatPreviewRevision | null;
    getPromotedAppId(id: string, sourceHash: string): string | null;
    setPromotedAppId(id: string, sourceHash: string, appId: string): void;
    revise(input: {
        id: string;
        expectedRevision: string;
        sourceHash: string;
        source: ChatPreviewSource;
        title?: string;
        preferredHeight?: number;
    }): {
        preview: ChatPreviewRecord;
        revision: ChatPreviewRevision;
    } | null;
}