How to transform a private key into an ECKey? I´d like to construct an ECKey from a hardcoded private key but it´s not working...
First try
If I run the code in this example the key import is working just fine. But since I actually want so send money I need to import my own key...
I tried this private key L48r9sYN2dtsWHWwJ1Xez27W7a3X7RvG6obrmVgU2JLTFQeUCnkh and used this site to generate it. When I try to make the private key an ECKey like this:
ECKey key = ECKey.fromPrivate(Base58.decodeToBigInteger(&quot;L48r9sYN2dtsWHWwJ1Xez27W7a3X7RvG6obrmVgU2JLTFQeUCnkh&quot;));

I´m getting the exception
Exception in thread &quot;main&quot; java.lang.IllegalArgumentException: private key exceeds 32 bytes: 304 bits

Second try
I tried the solution form this question with this code
String priv = &quot;L48r9sYN2dtsWHWwJ1Xez27W7a3X7RvG6obrmVgU2JLTFQeUCnkh&quot;;
ECKey key1 = DumpedPrivateKey.fromBase58(TestNet3Params.get(), priv).getKey();

Which leads me to this exception
Exception in thread &quot;main&quot; org.bitcoinj.core.AddressFormatException$WrongNetwork: Version code of address did not match acceptable versions for network: 128
at org.bitcoinj.core.DumpedPrivateKey.fromBase58(DumpedPrivateKey.java:59)
at com.javamaster.TicTacToeApplication.main(TicTacToeApplication.java:42)

Third try
I tried another solution form this question
    byte[] b = priv.getBytes();
    System.out.println(priv);
    ECKey key3 = ECKey.fromPrivate(b, true);

It results in the same exception as from the second try.
What is wrong with the key? Should I use another way to generate the private key?
The valid private key is L48r9sYN2dtsWHWwJ1Xez27W7a3X7RvG6obrmVgU2JLTFQeUCn not L48r9sYN2dtsWHWwJ1Xez27W7a3X7RvG6obrmVgU2JLTFQeUCnkh. You mistyped and added &quot;kh&quot;