import { KeyStoreParams, KeyType } from '../../../../modules/key';
import { ILogger } from '../../../logger';
import { SubService } from '../../index';
import { SubscriptionCallback } from '../../../../types/quorum';
import { ProviderClient, ProviderTransaction } from '../../../../types/provider';
import { PostgresClientType } from '../../../../types/postgres';
declare class PostgresSubService extends SubService<PostgresClientType & ProviderClient> {
    private static clientSubscriptions;
    private static clientHandlers;
    private instanceSubscriptions;
    private instanceId;
    constructor(eventClient: PostgresClientType & ProviderClient, storeClient?: PostgresClientType & ProviderClient);
    init(namespace: string, appId: string, engineId: string, logger: ILogger): Promise<void>;
    private setupNotificationHandler;
    transact(): ProviderTransaction;
    mintKey(type: KeyType, params: KeyStoreParams): string;
    mintSafeKey(type: KeyType, params: KeyStoreParams): [string, string];
    subscribe(keyType: KeyType.QUORUM, callback: SubscriptionCallback, appId: string, topic?: string): Promise<void>;
    unsubscribe(keyType: KeyType.QUORUM, appId: string, topic?: string): Promise<void>;
    /**
     * Cleanup method to remove all subscriptions for this instance.
     * Should be called when the SubService instance is being destroyed.
     */
    cleanup(): Promise<void>;
    publish(keyType: KeyType.QUORUM, message: Record<string, any>, appId: string, topic?: string, transaction?: ProviderTransaction): Promise<boolean>;
    psubscribe(): Promise<void>;
    punsubscribe(): Promise<void>;
}
export { PostgresSubService };