diff --git a/library.cpp b/library.cpp
index 438b51e..dfb4fe0 100644
--- a/library.cpp
+++ b/library.cpp
@@ -1,14 +1,9 @@
 #include "library.h"
 
 #include <QtCore/QDebug>
+#include <iostream>
+#include <QCoreApplication>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-#include <lib_logos_blockchain.h>
-#ifdef __cplusplus
-}
-#endif
 
 class LogosBlockchainModule : public LogosBlockchainModuleAPI {
     Q_OBJECT
@@ -24,46 +19,94 @@ public:
         if (node) stop();
     }
 
-    QString name() const override { return "liblogos-blockchain-module"; }
-    QString version() const override { return "1.0.0"; }
+    [[nodiscard]] QString name() const override { return "liblogos-blockchain-module"; }
+    [[nodiscard]] QString version() const override { return "1.0.0"; }
 
-    void initLogos(LogosAPI* logosAPIInstance) override {
+    Q_INVOKABLE void initLogos(LogosAPI* logosAPIInstance) override {
         logosAPI = logosAPIInstance;
     }
 
     Q_INVOKABLE int start(const QString& config_path) override {
         if (node) {
-            qWarning() << "Node already started";
+            qWarning() << "Could not execute the operation: The node is already running.";
             return 1;
         }
 
-        const QByteArray path = config_path.toUtf8();
-        InitializedLogosBlockchainNodeResult result = start_lb_node(path.constData());
+        // TODO: Ensure proper cleanup on SIGINT
 
-        if (!is_ok(&result.error)) {
-            qCritical() << "Failed to start Nomos node. Error code:" << result.error;
+        const QByteArray path = config_path.toUtf8();
+        auto [value, error] = start_lb_node(path.constData());
+
+        if (!is_ok(&error)) {
+            qCritical() << "Failed to start the node. Error:" << error;
             return 2;
         }
 
-        node = result.value;
-        qInfo() << "Nomos node started successfully";
+        node = value;
+        qInfo() << "The node was started successfully.";
         return 0;
     }
 
-    Q_INVOKABLE void stop() override {
+    Q_INVOKABLE int stop() override {
         if (!node) {
-            qWarning() << "Node not running";
-            return;
+            qWarning() << "Could not execute the operation: The node is not running.";
+            return 1;
         }
 
         const OperationStatus status = stop_node(node);
         if (is_ok(&status)) {
-            qInfo() << "Nomos node stopped successfully";
+            qInfo() << "The node was stopped successfully.";
         } else {
-            qCritical() << "Failed to stop Nomos node. Error code:" << status;
+            qCritical() << "Could not stop the node. Error:" << status;
         }
 
         node = nullptr;
+        return 0;
+    }
+
+    Q_INVOKABLE int subscribe() override {
+        if (!node) {
+            qWarning() << "Could not execute the operation: The node is not running.";
+            return 1;
+        }
+
+        subscribe_to_new_blocks(node, [](const char* block) {
+            std::cout << "Received new block: " << block << std::endl;
+        });
+
+        return 0;
+    }
+
+    Q_INVOKABLE int wallet_get_balance(const uint8_t* wallet_address, const HeaderId* optional_tip, BalanceResult* output_balance) override {
+        if (!node) {
+            qWarning() << "Could not execute the operation: The node is not running.";
+            return 1;
+        }
+
+        auto [value, error] = get_balance(node, wallet_address, optional_tip);
+        if (!is_ok(&error)) {
+            qCritical() << "Failed to get balance. Error:" << error;
+            return 1;
+        }
+
+        output_balance->value = value;
+        return 0;
+    }
+
+    Q_INVOKABLE int wallet_transfer_funds(const TransferFundsArguments* transfer_funds_arguments, Hash* output_hash) override {
+        if (!node) {
+            qWarning() << "Could not execute the operation: The node is not running.";
+            return 1;
+        }
+
+        auto [value, error] = transfer_funds(node, transfer_funds_arguments);
+        if (!is_ok(&error)) {
+            qCritical() << "Failed to transfer funds. Error:" << error;
+            return 1;
+        }
+
+        std::ranges::copy(value, *output_hash);
+        return 0;
     }
 };
 
diff --git a/library.h b/library.h
index 21a2023..ff89e14 100644
--- a/library.h
+++ b/library.h
@@ -3,6 +3,14 @@
 
 #include <core/interface.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include <lib_logos_blockchain.h>
+#ifdef __cplusplus
+}
+#endif
+
 class LogosBlockchainModuleAPI : public QObject, public PluginInterface {
     Q_OBJECT
     Q_INTERFACES(PluginInterface)
@@ -11,10 +19,16 @@ public:
     using QObject::QObject;
     ~LogosBlockchainModuleAPI() override = default;
 
-    Q_INVOKABLE virtual int start(const QString& config_path) = 0;
-    Q_INVOKABLE virtual void stop() = 0;
+    // Logos Core
     Q_INVOKABLE virtual void initLogos(LogosAPI* logosAPIInstance) = 0;
 
+    // Node
+    Q_INVOKABLE virtual int start(const QString& config_path) = 0;
+    Q_INVOKABLE virtual int stop() = 0;
+    Q_INVOKABLE virtual int subscribe() = 0;
+    Q_INVOKABLE virtual int wallet_get_balance(const uint8_t* wallet_address, const HeaderId* optional_tip, BalanceResult* output_balance) = 0;
+    Q_INVOKABLE virtual int wallet_transfer_funds(const TransferFundsArguments* transfer_funds_arguments, Hash* output_hash) = 0;
+
     signals:
         void eventResponse(const QString& eventName, const QVariantList& data);
 };