import { AwsCredentialConfig } from './clients/aws';
import { SNSClient } from './clients/sns';
import { SQSClient, SQSMessage, SQSQueueConfig } from './clients/sqs';
import { Logger } from './logger';
export interface SNSSQSSubscriberConfig {
    awsCredentials?: AwsCredentialConfig;
    topicName: string | string[];
    snsClient: SNSClient;
    sqsClient?: SQSClient;
    sqsQueueName?: string;
    sqsQueueConfig?: SQSQueueConfig;
    baseRetryIntervalSec?: number;
    maxRetryIntervalSec?: number;
    log?: Logger;
}
export declare abstract class SNSSQSSubscriber {
    private subscribed;
    private readonly topicNames;
    private readonly snsClient;
    private readonly sqsClient;
    private readonly baseRetryIntervalSec;
    private readonly maxRetryIntervalSec;
    protected readonly log: Logger;
    constructor(config: SNSSQSSubscriberConfig);
    protected getNext(): Promise<SQSMessage>;
    protected ensureSubscribed(): Promise<void>;
    protected getSqsClient(): SQSClient;
    protected getSnsClient(): SNSClient;
    backoff(message: SQSMessage): Promise<number>;
    delay(message: SQSMessage, delaySecs: number): Promise<number>;
    subscribeQueueToTopic(): Promise<string[]>;
    isReady(): boolean;
    private getReceiveCount;
}