/**
 * Utilities for converting between hex and base64 formats
 * Required for Canton Network integration (Canton uses base64, Privy uses hex)
 */
/**
 * Converts hex string to base64 format
 * @param hex - Hex string (with or without 0x prefix)
 * @returns Base64 encoded string
 * @example
 * ```ts
 * const base64 = hexToBase64('0x48656c6c6f');
 * console.log(base64); // "SGVsbG8="
 * ```
 */
export declare const hexToBase64: (hex: string) => string;
/**
 * Converts base64 string to hex format
 * @param base64 - Base64 encoded string
 * @returns Hex string with 0x prefix
 * @example
 * ```ts
 * const hex = base64ToHex('SGVsbG8=');
 * console.log(hex); // "0x48656c6c6f"
 * ```
 */
export declare const base64ToHex: (base64: string) => string;
/**
 * Converts Uint8Array to base64 string
 * @param bytes - Byte array to convert
 * @returns Base64 encoded string
 */
export declare const bytesToBase64: (bytes: Uint8Array) => string;
/**
 * Converts base64 string to Uint8Array
 * @param base64 - Base64 encoded string
 * @returns Byte array
 */
export declare const base64ToBytes: (base64: string) => Uint8Array;
/**
 * Removes leading 00 byte from hex string if present
 * Required for Stellar public keys from Privy which include a leading 00 byte
 * @param hex - Hex string (with or without 0x prefix)
 * @returns Clean hex string with 0x prefix
 * @example
 * ```ts
 * const clean = stripLeadingZero('0x00e95cb2553361ed...');
 * console.log(clean); // "0xe95cb2553361ed..."
 * ```
 */
export declare const stripLeadingZero: (hex: string) => string;
/**
 * Converts Privy public key (hex with leading 00) to Canton format (base64 without leading 00)
 * This function handles the conversion from Privy's Stellar wallet public key format
 * to Canton Network's expected base64 format.
 *
 * @param publicKeyHex - Public key in hex format from Privy (may include 0x prefix and leading 00)
 * @returns Public key in base64 format for Canton Network
 * @throws {Error} If conversion fails
 *
 * @example
 * ```ts
 * const wallet = { publicKey: '00e95cb2553361ed...' };
 * const cantonKey = privyPublicKeyToCantonBase64(wallet.publicKey);
 * // Use cantonKey for Canton Network API calls
 * ```
 */
export declare const privyPublicKeyToCantonBase64: (publicKeyHex: string) => string;
/**
 * Decodes a base58 string to bytes using BigInt for precision
 * @param str - Base58 encoded string
 * @returns Byte array
 */
export declare const base58ToBytes: (str: string) => Uint8Array;
/**
 * Converts a Solana address (base58) to base64 for Canton Network
 * @param address - Solana address in base58 format
 * @returns Public key in base64 format (32 bytes Ed25519 key)
 * @throws {Error} If decoded key is not 32 bytes
 */
export declare const solanaAddressToBase64: (address: string) => string;