import { ValidationError } from '@nestjs/common';
import { GraphQLError } from 'graphql/error';
/**
 * Recursively format validation errors into a GraphQL error
 * @param validationErrors - NestJS validation errors (class-validator)
 * returns a GraphQL error - GraphQLError with validation errors in extensions
 *
 * Extensions are formatted as follows:
 * ```
 * {
 *  code: 'BAD_USER_INPUT',
 *  fieldErrors: {
 *  field1: [
 *    { constraint: 'constraint1', message: 'message1', context: { ... } },
 *    { constraint: 'constraint2', message: 'message2', context: { ... } },
 *  ],
 * ```
 */
export declare const exceptionFactory: (validationErrors: ValidationError[]) => GraphQLError;
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