Move some private key methods to Crypto class

src/main/java/org/qortal/account/PrivateKeyAccount.java

@@ -11,15 +11,15 @@ public class PrivateKeyAccount extends PublicKeyAccount {
 	private final Ed25519PrivateKeyParameters edPrivateKeyParams;
 
 	/**
-	 * Create PrivateKeyAccount using byte[32] seed.
+	 * Create PrivateKeyAccount using byte[32] private key.
 	 * 
-	 * @param seed
+	 * @param privateKey
 	 *            byte[32] used to create private/public key pair
 	 * @throws IllegalArgumentException
-	 *             if passed invalid seed
+	 *             if passed invalid privateKey
 	 */
-	public PrivateKeyAccount(Repository repository, byte[] seed) {
-		this(repository, new Ed25519PrivateKeyParameters(seed, 0));
+	public PrivateKeyAccount(Repository repository, byte[] privateKey) {
+		this(repository, new Ed25519PrivateKeyParameters(privateKey, 0));
 	}
 
 	private PrivateKeyAccount(Repository repository, Ed25519PrivateKeyParameters edPrivateKeyParams) {
@@ -37,10 +37,6 @@ public class PrivateKeyAccount extends PublicKeyAccount {
 		return this.privateKey;
 	}
 
-	public static byte[] toPublicKey(byte[] seed) {
-		return new Ed25519PrivateKeyParameters(seed, 0).generatePublicKey().getEncoded();
-	}
-
 	public byte[] sign(byte[] message) {
 		return Crypto.sign(this.edPrivateKeyParams, message);
 	}

src/main/java/org/qortal/controller/tradebot/TradeBot.java

@@ -292,7 +292,7 @@ public class TradeBot implements Listener {
 	}
 
 	public static byte[] deriveTradeNativePublicKey(byte[] privateKey) {
-		return PrivateKeyAccount.toPublicKey(privateKey);
+		return Crypto.toPublicKey(privateKey);
 	}
 
 	public static byte[] deriveTradeForeignPublicKey(byte[] privateKey) {

src/main/java/org/qortal/crypto/Crypto.java

@@ -253,6 +253,10 @@ public abstract class Crypto {
 		return false;
 	}
 
+	public static byte[] toPublicKey(byte[] privateKey) {
+		return new Ed25519PrivateKeyParameters(privateKey, 0).generatePublicKey().getEncoded();
+	}
+
 	public static boolean verify(byte[] publicKey, byte[] signature, byte[] message) {
 		try {
 			return Ed25519.verify(signature, 0, publicKey, 0, message, 0, message.length);
@@ -264,7 +268,15 @@ public abstract class Crypto {
 	public static byte[] sign(Ed25519PrivateKeyParameters edPrivateKeyParams, byte[] message) {
 		byte[] signature = new byte[SIGNATURE_LENGTH];
 
-		edPrivateKeyParams.sign(Ed25519.Algorithm.Ed25519, edPrivateKeyParams.generatePublicKey(), null, message, 0, message.length, signature, 0);
+		edPrivateKeyParams.sign(Ed25519.Algorithm.Ed25519,null, message, 0, message.length, signature, 0);
+
+		return signature;
+	}
+
+	public static byte[] sign(byte[] privateKey, byte[] message) {
+		byte[] signature = new byte[SIGNATURE_LENGTH];
+
+		new Ed25519PrivateKeyParameters(privateKey, 0).sign(Ed25519.Algorithm.Ed25519,null, message, 0, message.length, signature, 0);
 
 		return signature;
 	}
@@ -281,5 +293,4 @@ public abstract class Crypto {
 
 		return sharedSecret;
 	}
-
 }

src/main/java/org/qortal/repository/hsqldb/HSQLDBRepository.java

@@ -23,7 +23,6 @@ import java.util.stream.Stream;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-import org.qortal.account.PrivateKeyAccount;
 import org.qortal.crypto.Crypto;
 import org.qortal.globalization.Translator;
 import org.qortal.gui.SysTray;
@@ -1003,7 +1002,7 @@ public class HSQLDBRepository implements Repository {
 		if (privateKey == null)
 			return null;
 
-		return PrivateKeyAccount.toPublicKey(privateKey);
+		return Crypto.toPublicKey(privateKey);
 	}
 
 	public static String ed25519PublicKeyToAddress(byte[] publicKey) {

src/test/java/org/qortal/test/apps/RewardShareKeys.java

@@ -6,6 +6,7 @@ import org.bouncycastle.jce.provider.BouncyCastleProvider;
 import org.bouncycastle.jsse.provider.BouncyCastleJsseProvider;
 import org.qortal.account.PrivateKeyAccount;
 import org.qortal.account.PublicKeyAccount;
+import org.qortal.crypto.Crypto;
 import org.qortal.utils.Base58;
 
 public class RewardShareKeys {
@@ -28,7 +29,7 @@ public class RewardShareKeys {
 		PublicKeyAccount recipientAccount = new PublicKeyAccount(null, args.length > 1 ? Base58.decode(args[1]) : minterAccount.getPublicKey());
 
 		byte[] rewardSharePrivateKey = minterAccount.getRewardSharePrivateKey(recipientAccount.getPublicKey());
-		byte[] rewardSharePublicKey = PrivateKeyAccount.toPublicKey(rewardSharePrivateKey);
+		byte[] rewardSharePublicKey = Crypto.toPublicKey(rewardSharePrivateKey);
 
 		System.out.println(String.format("Minter account: %s", minterAccount.getAddress()));
 		System.out.println(String.format("Minter's public key: %s", Base58.encode(minterAccount.getPublicKey())));

src/test/java/org/qortal/test/common/AccountUtils.java

@@ -6,6 +6,7 @@ import java.util.HashMap;
 import java.util.Map;
 
 import org.qortal.account.PrivateKeyAccount;
+import org.qortal.crypto.Crypto;
 import org.qortal.data.transaction.BaseTransactionData;
 import org.qortal.data.transaction.PaymentTransactionData;
 import org.qortal.data.transaction.RewardShareTransactionData;
@@ -45,7 +46,7 @@ public class AccountUtils {
 		long timestamp = repository.getTransactionRepository().fromSignature(reference).getTimestamp() + 1;
 
 		byte[] rewardSharePrivateKey = mintingAccount.getRewardSharePrivateKey(recipientAccount.getPublicKey());
-		byte[] rewardSharePublicKey = PrivateKeyAccount.toPublicKey(rewardSharePrivateKey);
+		byte[] rewardSharePublicKey = Crypto.toPublicKey(rewardSharePrivateKey);
 
 		BaseTransactionData baseTransactionData = new BaseTransactionData(timestamp, txGroupId, reference, mintingAccount.getPublicKey(), fee, null);
 		TransactionData transactionData = new RewardShareTransactionData(baseTransactionData, recipientAccount.getAddress(), rewardSharePublicKey, sharePercent);