/**
 * Shared helpers for hash-signing flows.
 */
export type SigningChainType = 'stellar' | 'solana';
export declare const resolveRequestedChainType: (chainType: string, withExportFallback: boolean) => SigningChainType;
export declare const hexToBytes: (hex: string) => Uint8Array;
export declare const bytesToHex: (bytes: Uint8Array) => string;