BchainCreateXPrvGetPubKey.java

Example of generating an XPrv BIP32 key and retrieving the public key using the blockchain module.

See Note on examples.

package doxy.examples;
 
import com.dinamonetworks.Dinamo;
 
import br.com.trueaccess.TacException;
import br.com.trueaccess.TacNDJavaLib;
 
public class BchainCreateXPrvGetPubKey {
 
    public static void main(String[] args) throws TacException {
        String ip = "127.0.0.1";
        String user = "master";
        String password = "12345678";
 
        Dinamo api = new Dinamo();
 
        api.openSession(ip, user, password);
 
        String xprvId = "xprv_pubkey_example";
 
        // Cria uma chave XPrv BIP32 (mainnet)
        api.bchainCreateXPrv(TacNDJavaLib.DN_BCHAIN_BIP32_XPRV,
                             TacNDJavaLib.DN_BCHAIN_VER_BIP32_MAINNET,
                             0,
                             xprvId);
        System.out.println("Chave XPrv criada: " + xprvId);
 
        // Recupera a chave pública correspondente no formato SEC1 comprimido
        byte[] pubKey = api.bchainGetPubKey(TacNDJavaLib.DN_BCHAIN_PBK_SEC1_COMP, xprvId);
        System.out.println("Chave pública recuperada (" + pubKey.length + " bytes).");
 
        // Remove a chave criada
        api.deleteKeyIfExists(xprvId);
        System.out.println("Chave XPrv removida: " + xprvId);
 
        api.closeSession();
    }
}