diff --git a/build.gradle b/build.gradle
index af5a7b6..02c3c59 100644
--- a/build.gradle
+++ b/build.gradle
@@ -68,6 +68,8 @@ jar {
         attributes "Main-Class": "com.sparrowwallet.drongo.Main"
     }
 
+    exclude('logback.xml')
+
     archiveBaseName = 'drongo'
     archiveVersion = '0.1'
 }
diff --git a/src/main/java/com/sparrowwallet/drongo/wallet/TransactionReference.java b/src/main/java/com/sparrowwallet/drongo/wallet/TransactionReference.java
new file mode 100644
index 0000000..1b2cf15
--- /dev/null
+++ b/src/main/java/com/sparrowwallet/drongo/wallet/TransactionReference.java
@@ -0,0 +1,57 @@
+package com.sparrowwallet.drongo.wallet;
+
+import java.util.Objects;
+
+public class TransactionReference implements Comparable<TransactionReference> {
+    private final String transactionId;
+    private final Integer height;
+    private final Long fee;
+
+    public TransactionReference(String transactionId) {
+        this(transactionId, 0, 0L);
+    }
+
+    public TransactionReference(String transactionId, Integer height) {
+        this(transactionId, height, 0L);
+    }
+
+    public TransactionReference(String transactionId, Integer height, Long fee) {
+        this.transactionId = transactionId;
+        this.height = height;
+        this.fee = fee;
+    }
+
+    public String getTransactionId() {
+        return transactionId;
+    }
+
+    public Integer getHeight() {
+        return height;
+    }
+
+    public Long getFee() {
+        return fee;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        TransactionReference that = (TransactionReference) o;
+        return transactionId.equals(that.transactionId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(transactionId);
+    }
+
+    @Override
+    public int compareTo(TransactionReference reference) {
+        return height - reference.height;
+    }
+
+    public TransactionReference copy() {
+        return new TransactionReference(transactionId, height, fee);
+    }
+}
diff --git a/src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java b/src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java
index 6f989b2..600599b 100644
--- a/src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java
+++ b/src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java
@@ -11,6 +11,7 @@ import com.sparrowwallet.drongo.policy.Policy;
 import com.sparrowwallet.drongo.policy.PolicyType;
 import com.sparrowwallet.drongo.protocol.Script;
 import com.sparrowwallet.drongo.protocol.ScriptType;
+import com.sparrowwallet.drongo.protocol.Transaction;
 
 import java.util.*;
 import java.util.stream.Collectors;
@@ -23,7 +24,8 @@ public class Wallet {
     private ScriptType scriptType;
     private Policy defaultPolicy;
     private List<Keystore> keystores = new ArrayList<>();
-    private final Set<Node> accountNodes = new TreeSet<>();
+    private final Set<Node> purposeNodes = new TreeSet<>();
+    private final Map<String, Transaction> transactions = new HashMap<>();
 
     public Wallet() {
     }
@@ -80,16 +82,20 @@ public class Wallet {
         this.keystores = keystores;
     }
 
-    private Set<Node> getAccountNodes() {
-        return accountNodes;
+    private Set<Node> getPurposeNodes() {
+        return purposeNodes;
+    }
+
+    public Map<String, Transaction> getTransactions() {
+        return transactions;
     }
 
     public Node getNode(KeyPurpose keyPurpose) {
         Node purposeNode;
-        Optional<Node> optionalPurposeNode = accountNodes.stream().filter(node -> node.getKeyPurpose().equals(keyPurpose)).findFirst();
+        Optional<Node> optionalPurposeNode = purposeNodes.stream().filter(node -> node.getKeyPurpose().equals(keyPurpose)).findFirst();
         if(optionalPurposeNode.isEmpty()) {
             purposeNode = new Node(keyPurpose);
-            accountNodes.add(purposeNode);
+            purposeNodes.add(purposeNode);
         } else {
             purposeNode = optionalPurposeNode.get();
         }
@@ -272,9 +278,9 @@ public class Wallet {
         for(Keystore keystore : keystores) {
             copy.getKeystores().add(keystore.copy());
         }
-        for(Wallet.Node node : accountNodes) {
+        for(Wallet.Node node : purposeNodes) {
             Node nodeCopy = copy.copyNode(node);
-            copy.getAccountNodes().add(nodeCopy);
+            copy.getPurposeNodes().add(nodeCopy);
         }
         return copy;
     }
@@ -286,6 +292,9 @@ public class Wallet {
         for(Node child : node.getChildren()) {
             copy.getChildren().add(copyNode(child));
         }
+        for(TransactionReference reference : node.getHistory()) {
+            copy.getHistory().add(reference.copy());
+        }
 
         return copy;
     }
@@ -349,6 +358,7 @@ public class Wallet {
         private String label;
         private Long amount;
         private Set<Node> children = new TreeSet<>();
+        private Set<TransactionReference> history = new TreeSet<>();
 
         private transient KeyPurpose keyPurpose;
         private transient int index = -1;
@@ -431,6 +441,14 @@ public class Wallet {
             this.children = children;
         }
 
+        public Set<TransactionReference> getHistory() {
+            return history;
+        }
+
+        public void setHistory(Set<TransactionReference> history) {
+            this.history = history;
+        }
+
         public Address getAddress() {
             return Wallet.this.getAddress(keyPurpose, index);
         }
diff --git a/src/main/java/module-info.java b/src/main/java/module-info.java
index 5e9c842..cbe6610 100644
--- a/src/main/java/module-info.java
+++ b/src/main/java/module-info.java
@@ -2,6 +2,8 @@ open module com.sparrowwallet.drongo {
     requires org.bouncycastle.provider;
     requires de.mkammerer.argon2;
     requires slf4j.api;
+    requires json.simple;
+    requires jeromq;
     exports com.sparrowwallet.drongo;
     exports com.sparrowwallet.drongo.psbt;
     exports com.sparrowwallet.drongo.protocol;