import { ValidationContext } from 'graphql';

/**
 * Creates a validator for the GraphQL query depth
 * @param {Number} maxDepth - The maximum allowed depth for any operation in a GraphQL document.
 * @param {Object} [options]
 * @param {String|RegExp|Function} options.ignore - Stops recursive depth checking based on a field name. Either a string or regexp to match the name, or a function that reaturns a boolean.
 * @param {Function} [callback] - Called each time validation runs. Receives an Object which is a map of the depths for each operation.
 * @returns {Function} The validator function for GraphQL validation phase.
 */
declare const depthLimit: (maxDepth: number, options?: {
    ignore: string | RegExp | Function;
}, callback?: ((_: Map<string, number>) => void) | undefined) => (validationContext: ValidationContext) => ValidationContext;

export { depthLimit as default };