support database persistence

build.gradle

@@ -55,7 +55,9 @@ dependencies {
     }
     implementation ('ch.qos.logback:logback-classic:1.2.3') {
         exclude group: 'org.hamcrest', module: 'hamcrest-core'
+        exclude group: 'org.slf4j'
     }
+    implementation ('org.slf4j:slf4j-api:1.7.30')
     testImplementation ('junit:junit:4.12') {
         exclude group: 'org.hamcrest', module: 'hamcrest-core'
     }

src/main/java/com/sparrowwallet/drongo/policy/Policy.java

@@ -2,13 +2,14 @@ package com.sparrowwallet.drongo.policy;
 
 import com.sparrowwallet.drongo.protocol.ScriptType;
 import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.Persistable;
 
 import java.util.List;
 
 import static com.sparrowwallet.drongo.protocol.ScriptType.*;
 import static com.sparrowwallet.drongo.policy.PolicyType.*;
 
-public class Policy {
+public class Policy extends Persistable {
     private static final String DEFAULT_NAME = "Default";
 
     private String name;
@@ -23,6 +24,10 @@ public class Policy {
         this.miniscript = miniscript;
     }
 
+    public String getName() {
+        return name;
+    }
+
     public Miniscript getMiniscript() {
         return miniscript;
     }
@@ -57,6 +62,8 @@ public class Policy {
     }
 
     public Policy copy() {
-        return new Policy(name, miniscript.copy());
+        Policy policy = new Policy(name, miniscript.copy());
+        policy.setId(getId());
+        return policy;
     }
 }

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

@@ -5,7 +5,7 @@ import com.sparrowwallet.drongo.protocol.Sha256Hash;
 import java.util.Date;
 import java.util.Objects;
 
-public abstract class BlockTransactionHash {
+public abstract class BlockTransactionHash extends Persistable {
     public static final int BLOCKS_TO_CONFIRM = 6;
     public static final int BLOCKS_TO_FULLY_CONFIRM = 100;
 

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

@@ -96,6 +96,8 @@ public class BlockTransactionHashIndex extends BlockTransactionHash implements C
     }
 
     public BlockTransactionHashIndex copy() {
-        return new BlockTransactionHashIndex(super.getHash(), super.getHeight(), super.getDate(), super.getFee(), index, value, spentBy == null ? null : spentBy.copy(), super.getLabel());
+        BlockTransactionHashIndex copy = new BlockTransactionHashIndex(super.getHash(), super.getHeight(), super.getDate(), super.getFee(), index, value, spentBy == null ? null : spentBy.copy(), super.getLabel());
+        copy.setId(getId());
+        return copy;
     }
 }

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

@@ -7,7 +7,7 @@ import com.sparrowwallet.drongo.crypto.*;
 import java.security.SecureRandom;
 import java.util.*;
 
-public class DeterministicSeed implements EncryptableItem {
+public class DeterministicSeed extends Persistable implements EncryptableItem {
     public static final int DEFAULT_SEED_ENTROPY_BITS = 128;
     public static final int MAX_SEED_ENTROPY_BITS = 512;
 
@@ -341,6 +341,7 @@ public class DeterministicSeed implements EncryptableItem {
             seed = new DeterministicSeed(new ArrayList<>(mnemonicCode), needsPassphrase, creationTimeSeconds, type);
         }
 
+        seed.setId(getId());
         seed.setPassphrase(passphrase);
         return seed;
     }

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

@@ -8,7 +8,7 @@ import com.sparrowwallet.drongo.crypto.*;
 
 import java.util.List;
 
-public class Keystore {
+public class Keystore extends Persistable {
     public static final String DEFAULT_LABEL = "Keystore 1";
     public static final int MAX_LABEL_LENGTH = 16;
 
@@ -229,6 +229,7 @@ public class Keystore {
 
     public Keystore copy() {
         Keystore copy = new Keystore(label);
+        copy.setId(getId());
         copy.setSource(source);
         copy.setWalletModel(walletModel);
         if(keyDerivation != null) {

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

@@ -6,7 +6,7 @@ import com.sparrowwallet.drongo.crypto.*;
 import java.nio.ByteBuffer;
 import java.util.Arrays;
 
-public class MasterPrivateExtendedKey implements EncryptableItem {
+public class MasterPrivateExtendedKey extends Persistable implements EncryptableItem {
     private final byte[] privateKey;
     private final byte[] chainCode;
 
@@ -112,11 +112,15 @@ public class MasterPrivateExtendedKey implements EncryptableItem {
     }
 
     public MasterPrivateExtendedKey copy() {
+        MasterPrivateExtendedKey copy;
         if(isEncrypted()) {
-            return new MasterPrivateExtendedKey(encryptedKey.copy());
+            copy = new MasterPrivateExtendedKey(encryptedKey.copy());
+        } else {
+            copy = new MasterPrivateExtendedKey(Arrays.copyOf(privateKey, 32), Arrays.copyOf(chainCode, 32));
         }
 
-        return new MasterPrivateExtendedKey(Arrays.copyOf(privateKey, 32), Arrays.copyOf(chainCode, 32));
+        copy.setId(getId());
+        return copy;
     }
 
     public void clear() {

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

@@ -0,0 +1,13 @@
+package com.sparrowwallet.drongo.wallet;
+
+public class Persistable {
+    private Long id;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+}

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

@@ -19,12 +19,13 @@ import java.util.stream.Collectors;
 import static com.sparrowwallet.drongo.protocol.ScriptType.*;
 import static com.sparrowwallet.drongo.protocol.Transaction.WITNESS_SCALE_FACTOR;
 
-public class Wallet {
+public class Wallet extends Persistable {
     public static final int DEFAULT_LOOKAHEAD = 20;
     public static final String ALLOW_DERIVATIONS_MATCHING_OTHER_SCRIPT_TYPES_PROPERTY = "com.sparrowwallet.allowDerivationsMatchingOtherScriptTypes";
 
     private String name;
     private Wallet masterWallet;
+    private List<Wallet> childWallets = new ArrayList<>();
     private Network network = Network.get();
     private PolicyType policyType;
     private ScriptType scriptType;
@@ -125,10 +126,18 @@ public class Wallet {
         this.storedBlockHeight = storedBlockHeight;
     }
 
+    public Integer gapLimit() {
+        return gapLimit;
+    }
+
     public int getGapLimit() {
         return gapLimit == null ? DEFAULT_LOOKAHEAD : gapLimit;
     }
 
+    public void gapLimit(Integer gapLimit) {
+        this.gapLimit = gapLimit;
+    }
+
     public void setGapLimit(int gapLimit) {
         this.gapLimit = gapLimit;
     }
@@ -141,6 +150,10 @@ public class Wallet {
         this.birthDate = birthDate;
     }
 
+    public boolean isMasterWallet() {
+        return masterWallet == null;
+    }
+
     public Wallet getMasterWallet() {
         return masterWallet;
     }
@@ -149,6 +162,22 @@ public class Wallet {
         this.masterWallet = masterWallet;
     }
 
+    public Wallet getChildWallet(String name) {
+        return childWallets.stream().filter(wallet -> wallet.getName().equals(name)).findFirst().orElse(null);
+    }
+
+    public List<Wallet> getChildWallets() {
+        return childWallets;
+    }
+
+    public void setChildWallets(List<Wallet> childWallets) {
+        this.childWallets = childWallets;
+    }
+
+    public TreeSet<WalletNode> getPurposeNodes() {
+        return purposeNodes;
+    }
+
     public synchronized WalletNode getNode(KeyPurpose keyPurpose) {
         WalletNode purposeNode;
         Optional<WalletNode> optionalPurposeNode = purposeNodes.stream().filter(node -> node.getKeyPurpose().equals(keyPurpose)).findFirst();
@@ -1108,6 +1137,9 @@ public class Wallet {
 
     public Wallet copy() {
         Wallet copy = new Wallet(name);
+        copy.setId(getId());
+        copy.setMasterWallet(masterWallet);
+        copy.setChildWallets(childWallets);
         copy.setPolicyType(policyType);
         copy.setScriptType(scriptType);
         copy.setDefaultPolicy(defaultPolicy.copy());

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

@@ -7,7 +7,7 @@ import com.sparrowwallet.drongo.crypto.ChildNumber;
 import java.util.*;
 import java.util.stream.Collectors;
 
-public class WalletNode implements Comparable<WalletNode> {
+public class WalletNode extends Persistable implements Comparable<WalletNode> {
     private final String derivationPath;
     private String label;
     private TreeSet<WalletNode> children = new TreeSet<>();
@@ -87,7 +87,7 @@ public class WalletNode implements Comparable<WalletNode> {
     }
 
     public Set<WalletNode> getChildren() {
-        return children == null ? null : Collections.unmodifiableSet(children);
+        return children;
     }
 
     public void setChildren(TreeSet<WalletNode> children) {
@@ -95,7 +95,7 @@ public class WalletNode implements Comparable<WalletNode> {
     }
 
     public Set<BlockTransactionHashIndex> getTransactionOutputs() {
-        return transactionOutputs == null ? null : Collections.unmodifiableSet(transactionOutputs);
+        return transactionOutputs;
     }
 
     public void setTransactionOutputs(TreeSet<BlockTransactionHashIndex> transactionOutputs) {
@@ -195,6 +195,7 @@ public class WalletNode implements Comparable<WalletNode> {
 
     public WalletNode copy() {
         WalletNode copy = new WalletNode(derivationPath);
+        copy.setId(getId());
         copy.setLabel(label);
 
         for(WalletNode child : getChildren()) {

src/main/java/module-info.java

@@ -1,7 +1,7 @@
 open module com.sparrowwallet.drongo {
     requires org.bouncycastle.provider;
     requires de.mkammerer.argon2;
-    requires slf4j.api;
+    requires org.slf4j;
     requires logback.core;
     requires logback.classic;
     requires json.simple;