/**
 * TETSUO Wallet SDK - Cryptographic Functions
 */
/**
 * Hash a value using SHA256
 */
export declare function sha256(data: string | Buffer): Buffer;
/**
 * Double SHA256 hash (used in Bitcoin-like protocols)
 */
export declare function doubleSha256(data: string | Buffer): Buffer;
/**
 * RIPEMD160 hash
 */
export declare function ripemd160(data: Buffer): Buffer;
/**
 * Hash160 = RIPEMD160(SHA256(data))
 * Used for address generation
 */
export declare function hash160(data: Buffer): Buffer;
/**
 * Generate random bytes
 */
export declare function randomBytes(length: number): Buffer;
/**
 * Encode data to hex string
 */
export declare function toHex(data: Buffer | string): string;
/**
 * Decode hex string to buffer
 */
export declare function fromHex(hex: string): Buffer;
/**
 * Convert buffer to base58 string (Bitcoin address encoding)
 */
export declare function toBase58(buffer: Buffer): string;
/**
 * Convert base58 string to buffer
 */
export declare function fromBase58(str: string): Buffer;
/**
 * Encode data with checksum using base58check (used for addresses)
 */
export declare function base58check(data: Buffer): string;
/**
 * Decode base58check data and verify checksum
 */
export declare function base58checkDecode(encoded: string): Buffer;