add utxo mix data storage to wallet

src/main/java/com/sparrowwallet/drongo/KeyPurpose.java

@@ -2,9 +2,13 @@ package com.sparrowwallet.drongo;
 
 import com.sparrowwallet.drongo.crypto.ChildNumber;
 
+import java.util.List;
+
 public enum KeyPurpose {
     RECEIVE(ChildNumber.ZERO), CHANGE(ChildNumber.ONE);
 
+    public static final List<KeyPurpose> DEFAULT_PURPOSES = List.of(RECEIVE, CHANGE);
+
     private final ChildNumber pathIndex;
 
     KeyPurpose(ChildNumber pathIndex) {

src/main/java/com/sparrowwallet/drongo/wallet/StandardAccount.java

@@ -20,6 +20,7 @@ public enum StandardAccount {
     WHIRLPOOL_BADBANK("Badbank", new ChildNumber(2147483644, true));
 
     public static final List<StandardAccount> WHIRLPOOL_ACCOUNTS = List.of(WHIRLPOOL_PREMIX, WHIRLPOOL_POSTMIX, WHIRLPOOL_BADBANK);
+    public static final List<StandardAccount> WHIRLPOOL_MIX_ACCOUNTS = List.of(WHIRLPOOL_PREMIX, WHIRLPOOL_POSTMIX);
 
     StandardAccount(String name, ChildNumber childNumber) {
         this.name = name;

src/main/java/com/sparrowwallet/drongo/wallet/UtxoMixData.java

@@ -0,0 +1,30 @@
+package com.sparrowwallet.drongo.wallet;
+
+public class UtxoMixData extends Persistable {
+    private final String poolId;
+    private final int mixesDone;
+    private final Long forwarding;
+
+    public UtxoMixData(String poolId, int mixesDone, Long forwarding) {
+        this.poolId = poolId;
+        this.mixesDone = mixesDone;
+        this.forwarding = forwarding;
+    }
+
+    public String getPoolId() {
+        return poolId;
+    }
+
+    public int getMixesDone() {
+        return mixesDone;
+    }
+
+    public Long getForwarding() {
+        return forwarding;
+    }
+
+    @Override
+    public String toString() {
+        return "{poolId:" + poolId + ", mixesDone:" + mixesDone + ", forwarding:" + forwarding + "}";
+    }
+}

src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java

@@ -14,6 +14,7 @@ import com.sparrowwallet.drongo.protocol.*;
 import com.sparrowwallet.drongo.psbt.PSBT;
 import com.sparrowwallet.drongo.psbt.PSBTInput;
 
+import java.nio.charset.StandardCharsets;
 import java.util.*;
 import java.util.function.Function;
 import java.util.stream.Collectors;
@@ -35,6 +36,7 @@ public class Wallet extends Persistable {
     private List<Keystore> keystores = new ArrayList<>();
     private final TreeSet<WalletNode> purposeNodes = new TreeSet<>();
     private final Map<Sha256Hash, BlockTransaction> transactions = new HashMap<>();
+    private final Map<Sha256Hash, UtxoMixData> utxoMixes = new HashMap<>();
     private Integer storedBlockHeight;
     private Integer gapLimit;
     private Date birthDate;
@@ -167,6 +169,10 @@ public class Wallet extends Persistable {
         return whirlpoolAccounts.isEmpty();
     }
 
+    public boolean isWhirlpoolMixWallet() {
+        return !isMasterWallet() && StandardAccount.WHIRLPOOL_MIX_ACCOUNTS.contains(getStandardAccountType());
+    }
+
     public void setName(String name) {
         this.name = name;
     }
@@ -224,6 +230,14 @@ public class Wallet extends Persistable {
         }
     }
 
+    public UtxoMixData getUtxoMixData(BlockTransactionHashIndex utxo) {
+        return utxoMixes.get(Sha256Hash.of(utxo.toString().getBytes(StandardCharsets.UTF_8)));
+    }
+
+    public Map<Sha256Hash, UtxoMixData> getUtxoMixes() {
+        return utxoMixes;
+    }
+
     public Integer getStoredBlockHeight() {
         return storedBlockHeight;
     }

src/main/java/com/sparrowwallet/drongo/wallet/WalletModel.java

@@ -44,7 +44,7 @@ public enum WalletModel {
     }
 
     public boolean alwaysIncludeNonWitnessUtxo() {
-        if(this == COLDCARD || this == COBO_VAULT || this == PASSPORT) {
+        if(this == COLDCARD || this == COBO_VAULT || this == PASSPORT || this == KEYSTONE) {
             return false;
         }