export declare class WechatAPIError extends Error {
    code: number;
}
export declare class AccessToken {
    readonly accessToken: string;
    readonly expireTime: number;
    constructor(token: {
        accessToken: string;
        expireTime: number;
    });
    isValid(): boolean;
    toJSON(): object;
}
declare const _default: {
    loadAccessToken(): Promise<AccessToken>;
    saveAccessToken(token: AccessToken): Promise<void>;
    registerAccessTokenHandler(handler?: {
        loadAccessToken?: () => Promise<AccessToken>;
        saveAccessToken?: (token: AccessToken) => Promise<void>;
    }): void;
    _processWechatResponse(data: any): Promise<any>;
    getAccessToken(): Promise<AccessToken>;
    getLatestAccessToken(): Promise<AccessToken>;
};
export default _default;