export declare const RECAP_IMAGE_MAX_BYTES: number;
export declare const RECAP_IMAGE_CONTENT_TYPE = "image/png";
export declare const RECAP_IMAGE_TTL_MS: number;
export declare const recapImagesStore: import("../db/store-registry.js").Store;
export declare function ensureRecapImageTable(): Promise<void>;
export declare function pruneExpiredRecapImages(now?: number): Promise<number>;
export declare function generateRecapImageToken(byteLength?: number): string;
export declare function isValidRecapImageToken(token: string | undefined | null): boolean;
export interface StoredRecapImage {
    bytes: Buffer;
    contentType: string;
}
export declare function saveRecapImage(png: Buffer, options?: {
    ownerEmail?: string | null;
}): Promise<{
    token: string;
}>;
/**
 * Load a stored image by token. Returns `null` for an unknown or malformed
 * token. Never returns anything but the opaque image bytes — no plan data.
 */
export declare function getRecapImage(token: string): Promise<StoredRecapImage | null>;