import { ZodTypeSupported } from './types.js';
/**
 * Options for the secure schema validator
 */
export interface SecureSchemaValidatorOptions {
    /**
     * Whether to perform AST validation
     */
    astValidation?: boolean;
    /**
     * Maximum allowed AST nodes to prevent DoS attacks
     */
    maxAstNodes?: number;
}
/**
 * Validates a JavaScript expression AST for potentially unsafe operations
 *
 * @param ast - The AST to validate
 * @param parentMap - Map of nodes to their parent nodes
 * @returns An object with validation result and optional error message
 */
export declare function validateAst(ast: any, parentMap: WeakMap<any, any>): {
    error?: string;
    isValid: boolean;
};
/**
 * Securely evaluates a Zod schema string using AST validation
 *
 * @param schemaString - The schema string to evaluate
 * @param options - Options for secure evaluation
 * @returns The evaluated schema or an error
 */
export declare function secureEvaluateSchema(schemaString: string, options?: SecureSchemaValidatorOptions): {
    error?: string;
    schema?: ZodTypeSupported;
    success: boolean;
};