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CHAT PoW difficulty now much greater if sender has no QORT balance

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catbref 2020-05-01 11:01:52 +01:00
parent edb56b74da
commit 55e99062ca
1 changed files with 15 additions and 4 deletions
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19
src/main/java/org/qortal/transaction/ChatTransaction.java
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@ -5,6 +5,7 @@ import java.util.List;
import org.qortal.account.Account; import org.qortal.account.Account;
import org.qortal.account.PublicKeyAccount; import org.qortal.account.PublicKeyAccount;
import org.qortal.asset.Asset;
import org.qortal.crypto.Crypto; import org.qortal.crypto.Crypto;
import org.qortal.crypto.MemoryPoW; import org.qortal.crypto.MemoryPoW;
import org.qortal.data.transaction.ChatTransactionData; import org.qortal.data.transaction.ChatTransactionData;
@ -23,7 +24,8 @@ public class ChatTransaction extends Transaction {
// Other useful constants // Other useful constants
public static final int MAX_DATA_SIZE = 256; public static final int MAX_DATA_SIZE = 256;
public static final int POW_BUFFER_SIZE = 8 * 1024 * 1024; // bytes public static final int POW_BUFFER_SIZE = 8 * 1024 * 1024; // bytes
public static final int POW_DIFFICULTY = 12; // leading zero bits public static final int POW_DIFFICULTY_WITH_QORT = 12; // leading zero bits
public static final int POW_DIFFICULTY_NO_QORT = 20; // leading zero bits
// Constructors // Constructors
@ -60,7 +62,7 @@ public class ChatTransaction extends Transaction {
// Processing // Processing
public void computeNonce() { public void computeNonce() throws DataException {
byte[] transactionBytes; byte[] transactionBytes;
try { try {
@ -72,8 +74,10 @@ public class ChatTransaction extends Transaction {
// Clear nonce from transactionBytes // Clear nonce from transactionBytes
ChatTransactionTransformer.clearNonce(transactionBytes); ChatTransactionTransformer.clearNonce(transactionBytes);
int difficulty = this.getSender().getConfirmedBalance(Asset.QORT) > 0 ? POW_DIFFICULTY_WITH_QORT : POW_DIFFICULTY_NO_QORT;
// Calculate nonce // Calculate nonce
this.chatTransactionData.setNonce(MemoryPoW.compute2(transactionBytes, POW_BUFFER_SIZE, POW_DIFFICULTY)); this.chatTransactionData.setNonce(MemoryPoW.compute2(transactionBytes, POW_BUFFER_SIZE, difficulty));
} }
@Override @Override
@ -132,8 +136,15 @@ public class ChatTransaction extends Transaction {
// Clear nonce from transactionBytes // Clear nonce from transactionBytes
ChatTransactionTransformer.clearNonce(transactionBytes); ChatTransactionTransformer.clearNonce(transactionBytes);
int difficulty;
try {
difficulty = this.getSender().getConfirmedBalance(Asset.QORT) > 0 ? POW_DIFFICULTY_WITH_QORT : POW_DIFFICULTY_NO_QORT;
} catch (DataException e) {
return false;
}
// Check nonce // Check nonce
return MemoryPoW.verify2(transactionBytes, POW_BUFFER_SIZE, POW_DIFFICULTY, nonce); return MemoryPoW.verify2(transactionBytes, POW_BUFFER_SIZE, difficulty, nonce);
} }
@Override @Override