import { AWSAuth } from '../utils/aws-initialise';
import { LambdaResponse, InvocationType } from '../types';
/**
 * Invoke an AWS Lambda function.
 * @param functionName The name of the Lambda function to invoke
 * @param payload The payload to pass to the Lambda function. Must be an object
 * @param invocationType The invocation type. Must be one of: RequestResponse, Event, DryRun
 * @param auth The AWS auth object to use
 * @throws If the function name is invalid or missing
 * @throws If the invocation type is invalid
 * @throws If the payload is not an object
 * @throws If there is an error invoking the Lambda function
 * @throws If the Lambda function returns no payload
 * @throws If the Lambda function returns an invalid response
 * @returns A LambdaResponse object with a statusCode and a body
 */
export declare const invokeLambdaFunction: (functionName: string, payload?: Record<string, unknown>, invocationType?: InvocationType, auth?: AWSAuth | null) => Promise<LambdaResponse>;