I'm facing an issue regarding generating address from private key.
I got the master private key from electrum as well as from bitcoin core
that is starts from
xprv9s21xxxxxxxxxxxxxxxxxxxxxxxxxxxx
in bitcoinJ:
ECKey key=ECKey.fromPrivate(prv); // it accepts bytes[] or BigInteger
how can i convert 9s21xxxxxxxxxxxxxxxxx into bytes[] or BigInteger.
Try:
String prvkey=9s21xxxxxxxxxxxxxxxxxxxxx
BigInteger bytes=new BigInteger(priv,16);
it throws exception as it can't convert due to number format.
Try 2:
byte[] bytes=prvkey.getBytes(StandardCharsets.UTF_16);
it generates valid address from ECKey and i send transaction to that address via electrum. but wallet didn't receive money. Don't know where the money gone.
what should i do to convert master private key into BigInteger or bytes[]
PS:
I'm beginner in cryptocurrency
Convert string private key into bytes[]:
ECKey key = ECKey.fromPrivate(prv.getBytes());
Or, convert string private key into BigInteger:
BigInteger privKey = Base58.decodeToBigInteger(prv);
ECKey key = ECKey.fromPrivate(privKey);