import type * as Joi from 'joi';
import { type FlowrMessage, type IdMessageBase, type MessageDefinition } from './messages/all-messages';
import type { Socket } from './net';
export interface ValidationErrorResult {
    type: 'error';
    reason: Joi.ValidationError | Error;
}
export interface SuccessValidationResult<T extends IdMessageBase> {
    type: 'success';
    message: T;
}
export type ValidationResult<T extends IdMessageBase> = SuccessValidationResult<T> | ValidationErrorResult;
/**
 * Check that the serialized input is a valid base message.
 */
export declare function validateBaseMessageFormat(input: string): ValidationResult<IdMessageBase>;
/**
 * Validates that the given input matches the given message definition.
 */
export declare function validateMessage<T extends FlowrMessage | IdMessageBase>(input: IdMessageBase, def: MessageDefinition<T>): ValidationResult<T>;
/**
 * Sends an error message to the given client indicating a validation error.
 */
export declare function answerForValidationError(client: Socket, result: ValidationErrorResult, id?: string): void;