/**
 * Query Sanitizer - Query Injection Protection
 *
 * Validates and sanitizes query expressions to prevent injection attacks,
 * excessive resource usage, and other query-based exploits.
 */
export interface QueryValidationOptions {
    /**
     * Maximum query length (default: 1000 characters)
     */
    maxLength?: number;
    /**
     * Maximum bracket/parenthesis nesting depth (default: 100)
     */
    maxDepth?: number;
    /**
     * Strip ANSI escape codes (default: true)
     */
    stripAnsiCodes?: boolean;
}
/**
 * Query expression sanitizer
 */
export declare class QuerySanitizer {
    /**
     * Sanitize and validate query expression
     *
     * @throws {SecurityError} if query is unsafe
     * @returns Sanitized query string
     */
    static sanitize(query: string, options?: QueryValidationOptions): string;
    /**
     * Strip ANSI escape codes from string
     */
    private static stripAnsiCodes;
    /**
     * Find dangerous patterns in query
     */
    private static findDangerousPattern;
    /**
     * Calculate maximum nesting depth of brackets/parentheses
     */
    private static getMaxNestingDepth;
    /**
     * Sanitize query for logging (truncate, remove sensitive data)
     */
    static sanitizeForLogging(query: string): string;
}
//# sourceMappingURL=query-sanitizer.d.ts.map