import type { Options } from 'ajv/dist/2020.js';
import { Ajv2020 } from 'ajv/dist/2020.js';
/**
 * Return cached instance of Ajv with default (recommended) options.
 *
 * This function should be used as much as possible,
 * to benefit from cached Ajv instance.
 */
export declare const getAjv: any;
/**
 * Returns cached instance of Ajv, which is non-mutating.
 *
 * To be used in places where we only need to know if an item is valid or not,
 * and are not interested in transforming the data.
 */
export declare const getNonMutatingAjv: any;
/**
 * Returns cached instance of Ajv, which is coercing data.
 *
 * To be used in places where we know that we are going to receive data with the wrong type,
 * typically: request path params and request query params.
 */
export declare const getCoercingAjv: any;
/**
 * Create Ajv with modified defaults.
 *
 * !!! Please note that this function is EXPENSIVE computationally !!!
 *
 * https://ajv.js.org/options.html
 */
export declare function createAjv(opt?: Options): Ajv2020;