import type { NotificationTarget } from '@xopcai/gateway-contract';
type ServiceAccount = {
    project_id: string;
    key_id: string;
    sub_account: string;
    private_key: string;
};
type PushCategory = 'WORK' | 'IM' | 'MARKETING';
export type HarmonyPushConfig = {
    accountFile: string;
    category: PushCategory;
    testMessage: boolean;
};
export type HarmonyNotification = {
    pushToken: string;
    eventId: string;
    title: string;
    body?: string;
    gatewayId?: string;
    target?: NotificationTarget;
};
export declare function harmonyPushConfig(env?: NodeJS.ProcessEnv): HarmonyPushConfig | undefined;
export declare function createHarmonyPushJwt(account: ServiceAccount, now?: number): string;
/** Uses HarmonyOS V3 service-account authentication, not the Android HMS OAuth flow. */
export declare function sendHarmonyPush(notification: HarmonyNotification, fetchImpl?: typeof fetch, config?: HarmonyPushConfig | undefined): Promise<string>;
export {};