/**
 * Utility functions to replace Node.js Buffer operations with browser-compatible Uint8Array operations
 */
/**
 * Convert base64 string to Uint8Array
 */
export declare function base64ToUint8Array(base64: string): Uint8Array;
/**
 * Convert Uint8Array to base64 string
 */
export declare function uint8ArrayToBase64(bytes: Uint8Array): string;
/**
 * Concatenate multiple Uint8Arrays
 */
export declare function concatenateUint8Arrays(arrays: Uint8Array[]): Uint8Array;
/**
 * Write a 32-bit big-endian unsigned integer to a Uint8Array
 */
export declare function writeUInt32BE(value: number, buffer: Uint8Array, offset?: number): void;
/**
 * Read a 32-bit big-endian unsigned integer from a Uint8Array
 */
export declare function readUInt32BE(buffer: Uint8Array, offset?: number): number;
/**
 * Check if two Uint8Arrays are equal
 */
export declare function uint8ArraysEqual(a: Uint8Array, b: Uint8Array): boolean;
/**
 * Copy data from one Uint8Array to another
 */
export declare function copyUint8Array(source: Uint8Array, target: Uint8Array, targetOffset?: number): void;
/**
 * Convert Uint8Array to string (for text data)
 */
export declare function uint8ArrayToString(bytes: Uint8Array): string;
/**
 * Convert string to Uint8Array
 */
export declare function stringToUint8Array(str: string): Uint8Array;
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