export declare type SnsNotification = {
    Message: string;
};
export declare type AwsLambdaSnsMessageEventRecord = {
    Sns: SnsNotification;
};
/**
 * Determine if event is an SNS event
 *
 * @param {Object} event - A Cloudwatch event object
 * @returns {boolean} - True if event is an SNS event
 */
export declare const isSnsEvent: (event: {
    EventSource?: string;
}) => boolean;
/**
 * Get message from SNS event.
 *
 * @param {var} event - SNS event
 * @param {any} [defaultValue] - Default value to use for message, if none exists.
 * @returns {any} - Message from SNS event
 */
export declare const getSnsEventMessage: (event: AwsLambdaSnsMessageEventRecord, defaultValue?: string | undefined) => string;
/**
 * Get message object from SNS event.
 *
 * @param {Object} event - SNS event
 * @returns {Object} - Message object from SNS event
 */
export declare const getSnsEventMessageObject: (event: AwsLambdaSnsMessageEventRecord) => any;
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