import { lambda, sns } from "@pulumi/aws";
import * as pulumi from "@pulumi/pulumi";
import { Handler } from "./function";
import { EventSubscription } from "./subscription";
export interface TopicEvent {
    Records: TopicRecord[];
}
export interface TopicRecord {
    EventVersion: string;
    EventSubscriptionArn: string;
    EventSource: string;
    Sns: SNSItem;
}
export interface SNSItem {
    SignatureVersion: string;
    Timestamp: string;
    Signature: string;
    SigningCertUrl: string;
    MessageId: string;
    Message: string;
    MessageAttributes: {
        [key: string]: SNSMessageAttribute;
    };
    Type: string;
    UnsubscribeUrl: string;
    TopicArn: string;
    Subject: string;
}
export interface SNSMessageAttribute {
    Type: string;
    Value: string;
}
export declare type TopicEventHandler = Handler<TopicEvent, void>;
/**
 * Arguments to control the topic subscription.  Currently empty, but still defined in case of
 * future need.
 */
export declare type TopicSubscriptionArgs = {};
/**
 * Creates a new subscription to the given topic using the lambda provided, along with optional
 * options to control the behavior of the subscription.
 */
export declare function subscribe(name: string, topic: sns.Topic, handler: TopicEventHandler, args?: TopicSubscriptionArgs, opts?: pulumi.ResourceOptions): TopicEventSubscription;
export declare class TopicEventSubscription extends EventSubscription {
    /**
     * The underlying sns object created for the subscription.
     */
    readonly subscription: sns.TopicSubscription;
    constructor(name: string, topic: sns.Topic, func: lambda.Function, args: TopicSubscriptionArgs, opts?: pulumi.ResourceOptions);
}