/**
 * Buffer conversion utilities for Next.js 15+ compatibility
 * Next.js 15 changed body/rscData from strings to Buffers
 */
/**
 * Convert a value to base64 string if it's a Buffer
 * Used when storing cache values (e.g., in Redis)
 *
 * @param value - Value that might be a Buffer
 * @returns Base64 string if Buffer, original value otherwise
 */
export declare function bufferToString(value: unknown): unknown;
/**
 * Convert a base64 string back to Buffer if it was originally a Buffer
 * Used when retrieving cache values (e.g., from Redis)
 *
 * This is a simplified version - in production you'd need to track
 * which fields were originally Buffers
 *
 * @param value - Value that might be a base64 string
 * @param isBuffer - Whether this value should be converted to Buffer
 * @returns Buffer if isBuffer is true, original value otherwise
 */
export declare function stringToBuffer(value: string, isBuffer: boolean): Buffer | string;
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