import * as lambda from './_lambda';
export type LambdaHandler = (event: Event, context: lambda.Context) => Promise<void>;
export type ResourceHandler = (event: Event, context: lambda.Context) => Promise<ResourceAttributes>;
/**
 * Implements a Lambda CloudFormation custom resource handler.
 *
 * @param handleEvent  the handler function that creates, updates and deletes the resource.
 * @param refAttribute the name of the attribute holindg the Physical ID of the resource.
 * @returns a handler function.
 */
export declare function customResourceHandler(handleEvent: ResourceHandler): LambdaHandler;
/**
 * General shape of custom resource attributes.
 */
export interface ResourceAttributes {
    /** The physical reference to this resource instance. */
    Ref: string;
    /** Other attributes of the resource. */
    [key: string]: string | undefined;
}
/**
 * @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/crpg-ref-responses.html
 */
export declare function sendResponse(event: Event, status: Status, physicalResourceId: string | undefined, data: {
    [name: string]: string | undefined;
}, reason?: string): Promise<void>;
export declare enum Status {
    SUCCESS = "SUCCESS",
    FAILED = "FAILED"
}
export declare enum RequestType {
    CREATE = "Create",
    UPDATE = "Update",
    DELETE = "Delete"
}
/** @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/crpg-ref-requests.html */
export type Event = CreateEvent | UpdateEvent | DeleteEvent;
export interface CloudFormationEventBase {
    readonly RequestType: RequestType;
    readonly ResponseURL: string;
    readonly StackId: string;
    readonly RequestId: string;
    readonly ResourceType: string;
    readonly LogicalResourceId: string;
    readonly ResourceProperties: {
        [name: string]: any;
    };
}
export interface CreateEvent extends CloudFormationEventBase {
    readonly RequestType: RequestType.CREATE;
    readonly PhysicalResourceId: undefined;
}
export interface UpdateEvent extends CloudFormationEventBase {
    readonly RequestType: RequestType.UPDATE;
    readonly PhysicalResourceId: string;
    readonly OldResourceProperties: {
        [name: string]: any;
    };
}
export interface DeleteEvent extends CloudFormationEventBase {
    readonly RequestType: RequestType.DELETE;
    readonly PhysicalResourceId: string;
}
/**
 * Validates that all required properties are present, and that no extraneous properties are provided.
 *
 * @param props      the properties to be validated.
 * @param validProps a mapping of valid property names to a boolean instructing whether the property is required or not.
 */
export declare function validateProperties(props: {
    [name: string]: any;
}, validProps: {
    [name: string]: boolean;
}): {
    [name: string]: any;
};