xpub to get all address

[jamalmohideen]

Hi,
I need to get all the generated addresses for an xpub (or Ltub) extended public key. When I use the HDPublicKey.deriveChild(path, false), it is giving me this error:

message: 'Invalid argument: creating a hardened path requires an HDPrivateKey',
stack: 'Invalid argument: creating a hardened path requires an HDPrivateKey\n' +
'Error\n' +

Please help me to get the list of addresses from xpub or ltub extended public key.