I want to know is it possible to generate master public key from an address? if not, what is needed to generate xpub key?
1 Answer
It's not possible. An address is created though a hash160 (RIPEMD160) which is a one-way function.
Creating a xpub key (bip32 extended public key) requires the according pubkey and the chaincode
.
Alternatively you can calculate an xpub from an xpriv (extended private key).