export const isNoErrorReturnCode = (code: number): boolean => code === 0x9000; export const getPath = (path: string): string => path && path.substr(0, 2) !== "m/" ? `m/${path}` : path; export const isError = (r: { returnCode: number; errorMessage?: string }): void => { if (!isNoErrorReturnCode(r.returnCode)) throw new Error(`${r.returnCode} - ${r.errorMessage}`); };