diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1f0a45f..089b7c7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -162,13 +162,12 @@ set_target_properties(${PLUGIN_TARGET} PROPERTIES
 )
 
 target_sources(${PLUGIN_TARGET} PRIVATE
-        src/logos_blockchain_module.cpp
-        src/logos_blockchain_module.h
-        metadata.json
+        ${CMAKE_CURRENT_SOURCE_DIR}/src/logos_blockchain_module.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/metadata.json
 )
 
-set_target_properties(${PLUGIN_TARGET} PROPERTIES
-        PUBLIC_HEADER "src/i_logos_blockchain_module.h"
+set_property(TARGET ${PLUGIN_TARGET} PROPERTY PUBLIC_HEADER
+        ${CMAKE_CURRENT_SOURCE_DIR}/src/i_logos_blockchain_module.h
 )
 
 target_include_directories(${PLUGIN_TARGET} PRIVATE
diff --git a/config/testnet.config.yaml b/config/testnet.config.yaml
index 0c02996..0efded0 100644
--- a/config/testnet.config.yaml
+++ b/config/testnet.config.yaml
@@ -190,6 +190,11 @@ storage:
 mempool:
   recovery_path: ./resources/recovery/mempool.json
 sdp:
+  declaration: null
+  wallet_config:
+    max_tx_fee: 18446744073709551615  # u64::MAX
+    # SDP funding public key - matches the genesis note pk used for SDP transaction fees
+    funding_pk: "89b7314f5184bae9eb7fa511098eb321b97b8fbbdec611dda591e0c01e18331d"
 wallet:
   known_keys:
     - "0000000000000000000000000000000000000000000000000000000000000000"
diff --git a/flake.nix b/flake.nix
index 5a8b74a..a436cf3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -94,10 +94,9 @@
           pkgs = mkPkgs system;
           logosBlockchainModule = self.packages.${system}.logos-blockchain-module;
           logosModuleViewer = logos-module-viewer.packages.${system}.default;
-          extension =
-                if pkgs.stdenv.isDarwin then "dylib"
-                else if pkgs.stdenv.isWindows then "dll"
-                else "so";
+          extension = if pkgs.stdenv.isDarwin then "dylib"
+            else if pkgs.stdenv.hostPlatform.isWindows then "dll"
+            else "so";
         in
         {
           default = {
diff --git a/src/i_logos_blockchain_module.h b/src/i_logos_blockchain_module.h
index d19df4a..ae59bee 100644
--- a/src/i_logos_blockchain_module.h
+++ b/src/i_logos_blockchain_module.h
@@ -11,25 +11,19 @@ extern "C" {
 }
 #endif
 
-class ILogosBlockchainModule : public QObject, public PluginInterface {
-    Q_INTERFACES(PluginInterface)
-
+class ILogosBlockchainModule {
 public:
-    using QObject::QObject;
-    ~ILogosBlockchainModule() override = default;
+    virtual ~ILogosBlockchainModule() = default;
 
     // Logos Core
-    Q_INVOKABLE virtual void initLogos(LogosAPI* logosAPIInstance) = 0;
+    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);
+    virtual int start(const QString& config_path, const QString& deployment) = 0;
+    virtual int stop() = 0;
+    virtual int subscribe() = 0;
+    virtual int wallet_get_balance(const uint8_t* wallet_address, const HeaderId* optional_tip, BalanceResult* output_balance) = 0;
+    virtual int wallet_transfer_funds(const TransferFundsArguments* transfer_funds_arguments, Hash* output_hash) = 0;
 };
 
 #define ILogosBlockchainModule_iid "org.logos.ilogosblockchainmodule"
diff --git a/src/logos_blockchain_module.cpp b/src/logos_blockchain_module.cpp
index d87e1fe..9139fcc 100644
--- a/src/logos_blockchain_module.cpp
+++ b/src/logos_blockchain_module.cpp
@@ -23,19 +23,39 @@ void LogosBlockchainModule::initLogos(LogosAPI* logosAPIInstance) {
     logosAPI = logosAPIInstance;
 }
 
-int LogosBlockchainModule::start(const QString& config_path) {
+int LogosBlockchainModule::start(const QString& config_path, const QString& deployment) {
     if (node) {
         qWarning() << "Could not execute the operation: The node is already running.";
         return 1;
     }
 
-    const QByteArray path = config_path.toUtf8();
-    const char* deployment = nullptr;
+    QString effective_config_path= config_path;
 
-    auto [value, error] = start_lb_node(path.constData(), deployment);
+    if (effective_config_path.isEmpty()) {
+        const char* env = std::getenv("LB_CONFIG_PATH");
+        if (env && *env) {
+            effective_config_path = QString::fromUtf8(env);
+            qInfo() << "Using config from LB_CONFIG_PATH:" << effective_config_path;
+        } else {
+            qCritical() << "Config path was not specified and LB_CONFIG_PATH is not set.";
+            return 2;
+        }
+    }
+
+    qInfo() << "Starting the node with the configuration file:" << effective_config_path;
+    qInfo() << "Using deployment:" << (deployment.isEmpty() ? "<default>" : deployment);
+
+    const QByteArray config_path_buffer = effective_config_path.toUtf8();
+    const char* config_path_ptr = effective_config_path.isEmpty() ? nullptr : config_path_buffer.constData();
+
+    const QByteArray deployment_buffer = deployment.toUtf8();
+    const char* deployment_ptr = deployment.isEmpty() ? nullptr : deployment_buffer.constData();
+
+    auto [value, error] = start_lb_node(config_path_ptr, deployment_ptr);
+    qInfo() << "Start node returned with value and error.";
     if (!is_ok(&error)) {
         qCritical() << "Failed to start the node. Error:" << error;
-        return 2;
+        return 3;
     }
 
     node = value;
diff --git a/src/logos_blockchain_module.h b/src/logos_blockchain_module.h
index c6a0ce8..ef49baa 100644
--- a/src/logos_blockchain_module.h
+++ b/src/logos_blockchain_module.h
@@ -2,24 +2,30 @@
 
 #include "i_logos_blockchain_module.h"
 
-class LogosBlockchainModule final : public ILogosBlockchainModule {
+class LogosBlockchainModule final : public QObject, public PluginInterface, public ILogosBlockchainModule {
     Q_OBJECT
     Q_PLUGIN_METADATA(IID ILogosBlockchainModule_iid FILE "../metadata.json")
+    Q_INTERFACES(PluginInterface)
 
 public:
     LogosBlockchainModule();
     ~LogosBlockchainModule() override;
 
+    // Logos Core
     [[nodiscard]] QString name() const override;
     [[nodiscard]] QString version() const override;
-
     Q_INVOKABLE void initLogos(LogosAPI*) override;
-    Q_INVOKABLE int start(const QString&) override;
+
+    // Logos Blockchain
+    Q_INVOKABLE int start(const QString& config_path, const QString& deployment) override;
     Q_INVOKABLE int stop() override;
     Q_INVOKABLE int subscribe() override;
     Q_INVOKABLE int wallet_get_balance(const uint8_t*, const HeaderId*, BalanceResult*) override;
     Q_INVOKABLE int wallet_transfer_funds(const TransferFundsArguments*, Hash*) override;
 
+    signals:
+        void eventResponse(const QString& eventName, const QVariantList& data);
+
 private:
     LogosBlockchainNode* node = nullptr;
 };