import type { WechatMpAccountState } from "./types.js";
export declare function markProcessedMessage(msgId: string): Promise<boolean>;
export declare function getAccountState(accountId: string): Promise<WechatMpAccountState>;
export declare function updateAccountState(accountId: string, patch: Partial<WechatMpAccountState>): Promise<WechatMpAccountState>;
export declare function flushWechatMpStateForTests(): Promise<void>;
export declare function setWechatMpStateFilePathForTests(nextPath?: string): void;
/**
 * Get the last interaction time for a user within an account.
 * Returns null if the user has never interacted or interaction data doesn't exist.
 *
 * @param accountId The account identifier
 * @param openId The user's openId
 * @returns Last interaction timestamp in milliseconds, or null
 */
export declare function getLastInteractionTime(accountId: string, openId: string): Promise<number | null>;
/**
 * Record a user interaction timestamp.
 * Called when processing inbound messages to track the 48h interaction window.
 *
 * @param accountId The account identifier
 * @param openId The user's openId
 * @param timestamp Optional timestamp (defaults to Date.now())
 */
export declare function recordUserInteraction(accountId: string, openId: string, timestamp?: number): Promise<void>;
/**
 * Check if a user is within the 48h interaction window.
 *
 * @param accountId The account identifier
 * @param openId The user's openId
 * @returns true if user has interacted within the last 48 hours
 */
export declare function isWithinInteractionWindow(accountId: string, openId: string): Promise<boolean>;
/**
 * Get when the 48h interaction window expires for a user.
 *
 * @param accountId The account identifier
 * @param openId The user's openId
 * @returns Expiration timestamp in milliseconds, or null if outside window
 */
export declare function getInteractionWindowExpiry(accountId: string, openId: string): Promise<number | null>;
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