feat(gui): Change Monero node while running (#502)

* feat(gui): Change daemon during runtime

* feat(swap-controller): Add `monero-seed` RPC command

* nitpicks

* amend changelog

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- ASB + CONTROLLER: Add a `monero_seed` command to the controller shell. You can use it to export the seed and restore height of the internal Monero wallet. You can use those to import the wallet into a wallet software of your own choosing.
+- GUI: You can now change the Monero Node without having to restart.
+
 ## [3.0.0-beta.8] - 2025-08-10
 
 - GUI: Speedup startup by concurrently bootstrapping Tor and requesting the user to select a wallet

monero-rpc-pool/src/lib.rs

@@ -37,6 +37,14 @@ pub struct AppState {
 /// Manages background tasks for the RPC pool
 pub struct PoolHandle {
     pub status_update_handle: JoinHandle<()>,
+    pub server_info: ServerInfo,
+}
+
+impl PoolHandle {
+    /// Get the current server info for the pool
+    pub fn server_info(&self) -> &ServerInfo {
+        &self.server_info
+    }
 }
 
 impl Drop for PoolHandle {
@@ -92,6 +100,10 @@ pub async fn create_app_with_receiver(
 
     let pool_handle = PoolHandle {
         status_update_handle,
+        server_info: ServerInfo {
+            port: config.port,
+            host: config.host.clone(),
+        },
     };
 
     let app_state = AppState {
@@ -145,7 +157,7 @@ pub async fn start_server_with_random_port(
     PoolHandle,
 )> {
     let host = config.host.clone();
-    let (app, status_receiver, pool_handle) = create_app_with_receiver(config).await?;
+    let (app, status_receiver, mut pool_handle) = create_app_with_receiver(config).await?;
 
     // Bind to port 0 to get a random available port
     let listener = tokio::net::TcpListener::bind(format!("{}:0", host)).await?;
@@ -156,6 +168,9 @@ pub async fn start_server_with_random_port(
         host: host.clone(),
     };
 
+    // Update the pool handle with the actual server info
+    pool_handle.server_info = server_info.clone();
+
     info!(
         "Started server on {}:{} (random port)",
         server_info.host, server_info.port

monero-sys/src/bridge.h

@@ -200,9 +200,10 @@ namespace Monero
             subtract_fee_indices); // Subtract fee from all outputs
     }
 
-    inline bool setWalletDaemon(Wallet &wallet, const std::string &daemon_address)
+    inline bool setWalletDaemon(Wallet &wallet, const std::string &daemon_address, bool try_ssl)
     {
-        return wallet.setDaemon(daemon_address);
+        std::string ssl = try_ssl ? "autodetect" : "disabled";
+        return wallet.setDaemon(daemon_address, ssl);
     }
 
     inline std::unique_ptr<std::string> pendingTransactionTxId(const PendingTransaction &tx)

monero-sys/src/bridge.rs

@@ -191,7 +191,11 @@ pub mod ffi {
         fn refreshAsync(self: Pin<&mut Wallet>) -> Result<()>;
 
         /// Set the daemon address.
-        fn setWalletDaemon(wallet: Pin<&mut Wallet>, daemon_address: &CxxString) -> Result<bool>;
+        fn setWalletDaemon(
+            wallet: Pin<&mut Wallet>,
+            daemon_address: &CxxString,
+            try_ssl: bool,
+        ) -> Result<bool>;
 
         /// Set whether the daemon is trusted.
         fn setTrustedDaemon(self: Pin<&mut Wallet>, trusted: bool) -> Result<()>;

monero-sys/src/lib.rs

@@ -1394,7 +1394,7 @@ impl FfiWallet {
         .map_err(|e| anyhow!("Failed to initialize wallet: {e}"))?;
         tracing::debug!("Initialized wallet, setting daemon address");
 
-        wallet.set_daemon_address(&daemon.address)?;
+        wallet.set_daemon(&daemon)?;
 
         if background_sync {
             tracing::debug!("Background sync enabled, starting refresh thread");
@@ -1438,13 +1438,16 @@ impl FfiWallet {
         monero::Address::from_str(&address.to_string()).expect("wallet's own address to be valid")
     }
 
-    pub fn set_daemon_address(&mut self, address: &str) -> anyhow::Result<()> {
-        tracing::debug!(%address, "Setting daemon address");
+    pub fn set_daemon(&mut self, daemon: &Daemon) -> anyhow::Result<()> {
+        let ssl = daemon.ssl;
+        let address = daemon.address.clone();
+
+        tracing::debug!(%address, %ssl, "Setting daemon address");
 
         let_cxx_string!(address = address);
         let raw_wallet = &mut self.inner;
 
-        let success = ffi::setWalletDaemon(raw_wallet.pinned(), &address)
+        let success = ffi::setWalletDaemon(raw_wallet.pinned(), &address, ssl)
             .context("Failed to set daemon address: FFI call failed with exception")?;
 
         if !success {

src-gui/src/renderer/rpc.ts

@@ -44,6 +44,7 @@ import {
   SetRestoreHeightArgs,
   SetRestoreHeightResponse,
   GetRestoreHeightResponse,
+  MoneroNodeConfig,
 } from "models/tauriModel";
 import {
   rpcSetBalance,
@@ -641,3 +642,33 @@ export async function saveFilesInDialog(files: Record<string, string>) {
 export async function dfxAuthenticate(): Promise<DfxAuthenticateResponse> {
   return await invokeNoArgs<DfxAuthenticateResponse>("dfx_authenticate");
 }
+
+export async function changeMoneroNode(
+  nodeConfig: MoneroNodeConfig,
+): Promise<void> {
+  await invoke<{ node_config: MoneroNodeConfig }, void>("change_monero_node", {
+    node_config: nodeConfig,
+  });
+}
+
+// Helper function to create MoneroNodeConfig from current settings
+export async function getCurrentMoneroNodeConfig(): Promise<MoneroNodeConfig> {
+  const network = getNetwork();
+  const useMoneroRpcPool = store.getState().settings.useMoneroRpcPool;
+  const moneroNodeUrl =
+    store.getState().settings.nodes[network][Blockchain.Monero][0] ?? null;
+
+  const moneroNodeConfig =
+    useMoneroRpcPool ||
+    moneroNodeUrl == null ||
+    !(await getMoneroNodeStatus(moneroNodeUrl, network))
+      ? { type: "Pool" as const }
+      : {
+          type: "SingleNode" as const,
+          content: {
+            url: moneroNodeUrl,
+          },
+        };
+
+  return moneroNodeConfig;
+}

src-gui/src/store/middleware/storeListener.ts

@@ -7,6 +7,8 @@ import {
   fetchSellersAtPresetRendezvousPoints,
   getSwapInfo,
   initializeMoneroWallet,
+  changeMoneroNode,
+  getCurrentMoneroNodeConfig,
 } from "renderer/rpc";
 import logger from "utils/logger";
 import { contextStatusEventReceived } from "store/features/rpcSlice";
@@ -14,6 +16,9 @@ import {
   addNode,
   setFetchFiatPrices,
   setFiatCurrency,
+  setUseMoneroRpcPool,
+  Blockchain,
+  Network,
 } from "store/features/settingsSlice";
 import { fetchFeedbackMessagesViaHttp, updateRates } from "renderer/api";
 import { store } from "renderer/store/storeRenderer";
@@ -22,7 +27,8 @@ import {
   addFeedbackId,
   setConversation,
 } from "store/features/conversationsSlice";
-import { TauriContextStatusEvent } from "models/tauriModel";
+import { TauriContextStatusEvent, MoneroNodeConfig } from "models/tauriModel";
+import { getNetwork } from "store/config";
 
 // Create a Map to store throttled functions per swap_id
 const throttledGetSwapInfoFunctions = new Map<
@@ -128,6 +134,25 @@ export function createMainListeners() {
     },
   });
 
+  // Listener for Monero node configuration changes
+  listener.startListening({
+    actionCreator: setUseMoneroRpcPool,
+    effect: async (action) => {
+      const usePool = action.payload;
+      logger.info(
+        `Monero node setting changed to: ${usePool ? "Pool" : "Single Node"}`,
+      );
+
+      try {
+        const nodeConfig = await getCurrentMoneroNodeConfig();
+        await changeMoneroNode(nodeConfig);
+        logger.info("Changed Monero node configuration to: ", nodeConfig);
+      } catch (error) {
+        logger.error("Failed to change Monero node configuration:", error);
+      }
+    },
+  });
+
   // Listener for when a feedback id is added
   listener.startListening({
     actionCreator: addFeedbackId,

src-tauri/src/lib.rs

@@ -6,11 +6,11 @@ use swap::cli::{
     api::{
         data,
         request::{
-            BalanceArgs, BuyXmrArgs, CancelAndRefundArgs, CheckElectrumNodeArgs,
-            CheckElectrumNodeResponse, CheckMoneroNodeArgs, CheckMoneroNodeResponse, CheckSeedArgs,
-            CheckSeedResponse, DfxAuthenticateResponse, ExportBitcoinWalletArgs,
-            GetCurrentSwapArgs, GetDataDirArgs, GetHistoryArgs, GetLogsArgs,
-            GetMoneroAddressesArgs, GetMoneroBalanceArgs, GetMoneroHistoryArgs,
+            BalanceArgs, BuyXmrArgs, CancelAndRefundArgs, ChangeMoneroNodeArgs,
+            CheckElectrumNodeArgs, CheckElectrumNodeResponse, CheckMoneroNodeArgs,
+            CheckMoneroNodeResponse, CheckSeedArgs, CheckSeedResponse, DfxAuthenticateResponse,
+            ExportBitcoinWalletArgs, GetCurrentSwapArgs, GetDataDirArgs, GetHistoryArgs,
+            GetLogsArgs, GetMoneroAddressesArgs, GetMoneroBalanceArgs, GetMoneroHistoryArgs,
             GetMoneroMainAddressArgs, GetMoneroSyncProgressArgs, GetPendingApprovalsResponse,
             GetRestoreHeightArgs, GetSwapInfoArgs, GetSwapInfosAllArgs, ListSellersArgs,
             MoneroRecoveryArgs, RedactArgs, RejectApprovalArgs, RejectApprovalResponse,
@@ -212,6 +212,7 @@ pub fn run() {
             reject_approval_request,
             get_restore_height,
             dfx_authenticate,
+            change_monero_node,
         ])
         .setup(setup)
         .build(tauri::generate_context!())
@@ -253,6 +254,7 @@ tauri_command!(list_sellers, ListSellersArgs);
 tauri_command!(cancel_and_refund, CancelAndRefundArgs);
 tauri_command!(redact, RedactArgs);
 tauri_command!(send_monero, SendMoneroArgs);
+tauri_command!(change_monero_node, ChangeMoneroNodeArgs);
 
 // These commands require no arguments
 tauri_command!(get_wallet_descriptor, ExportBitcoinWalletArgs, no_args);

swap/src/cli/api.rs

@@ -644,6 +644,65 @@ impl Context {
     pub fn tauri_handle(&self) -> Option<TauriHandle> {
         self.tauri_handle.clone()
     }
+
+    /// Change the Monero node configuration for all wallets
+    pub async fn change_monero_node(&self, node_config: MoneroNodeConfig) -> Result<()> {
+        let monero_manager = self
+            .monero_manager
+            .as_ref()
+            .context("Monero wallet manager not available")?;
+
+        // Determine the daemon configuration based on the node config
+        let daemon = match node_config {
+            MoneroNodeConfig::Pool => {
+                // Use the pool handle to get server info
+                let pool_handle = self
+                    .monero_rpc_pool_handle
+                    .as_ref()
+                    .context("Pool handle not available")?;
+
+                let server_info = pool_handle.server_info();
+                let pool_url: String = server_info.clone().into();
+                tracing::info!("Switching to Monero RPC pool: {}", pool_url);
+
+                monero_sys::Daemon {
+                    address: pool_url,
+                    ssl: false,
+                }
+            }
+            MoneroNodeConfig::SingleNode { url } => {
+                tracing::info!("Switching to single Monero node: {}", url);
+
+                // Parse the URL to determine SSL and address
+                let (address, ssl) = if url.starts_with("https://") {
+                    (
+                        url.strip_prefix("https://").unwrap_or(&url).to_string(),
+                        true,
+                    )
+                } else if url.starts_with("http://") {
+                    (
+                        url.strip_prefix("http://").unwrap_or(&url).to_string(),
+                        false,
+                    )
+                } else {
+                    // Default to HTTP if no protocol specified
+                    (url, false)
+                };
+
+                monero_sys::Daemon { address, ssl }
+            }
+        };
+
+        // Update the wallet manager's daemon configuration
+        monero_manager
+            .change_monero_node(daemon.clone())
+            .await
+            .context("Failed to change Monero node in wallet manager")?;
+
+        tracing::info!(?daemon, "Switched Monero node");
+
+        Ok(())
+    }
 }
 
 impl fmt::Debug for Context {

swap/src/cli/api/request.rs

@@ -1,7 +1,7 @@
 use super::tauri_bindings::TauriHandle;
 use crate::bitcoin::{wallet, CancelTimelock, ExpiredTimelocks, PunishTimelock};
 use crate::cli::api::tauri_bindings::{
-    ApprovalRequestType, SelectMakerDetails, SendMoneroDetails, TauriEmitter,
+    ApprovalRequestType, MoneroNodeConfig, SelectMakerDetails, SendMoneroDetails, TauriEmitter,
     TauriSwapProgressEvent,
 };
 use crate::cli::api::Context;
@@ -2006,3 +2006,37 @@ pub struct DfxAuthenticateResponse {
     pub access_token: String,
     pub kyc_url: String,
 }
+
+// ChangeMoneroNode
+#[typeshare]
+#[derive(Debug, Serialize, Deserialize)]
+pub struct ChangeMoneroNodeArgs {
+    pub node_config: MoneroNodeConfig,
+}
+
+#[typeshare]
+#[derive(Serialize, Deserialize, Debug)]
+pub struct ChangeMoneroNodeResponse {
+    pub success: bool,
+}
+
+impl Request for ChangeMoneroNodeArgs {
+    type Response = ChangeMoneroNodeResponse;
+
+    async fn request(self, ctx: Arc<Context>) -> Result<Self::Response> {
+        change_monero_node(self, ctx).await
+    }
+}
+
+#[tracing::instrument(fields(method = "change_monero_node"), skip(context))]
+pub async fn change_monero_node(
+    args: ChangeMoneroNodeArgs,
+    context: Arc<Context>,
+) -> Result<ChangeMoneroNodeResponse> {
+    context
+        .change_monero_node(args.node_config)
+        .await
+        .context("Failed to change Monero node")?;
+
+    Ok(ChangeMoneroNodeResponse { success: true })
+}

swap/src/monero/wallet.rs

@@ -12,6 +12,7 @@ use anyhow::{Context, Result};
 use monero::{Address, Network};
 use monero_sys::WalletEventListener;
 pub use monero_sys::{Daemon, WalletHandle as Wallet, WalletHandleListener};
+use tokio::sync::RwLock;
 use uuid::Uuid;
 
 use crate::cli::api::{
@@ -29,7 +30,7 @@ pub struct Wallets {
     /// The network we're on.
     network: Network,
     /// The monero node we connect to.
-    daemon: Daemon,
+    daemon: Arc<RwLock<Daemon>>,
     /// Keep the main wallet open and synced.
     main_wallet: Arc<Wallet>,
     /// Since Network::Regtest isn't a thing we have to use an extra flag.
@@ -275,6 +276,8 @@ impl Wallets {
                 .await;
         }
 
+        let daemon = Arc::new(RwLock::new(daemon));
+
         let wallets = Self {
             wallet_dir,
             network,
@@ -323,6 +326,8 @@ impl Wallets {
                 .await;
         }
 
+        let daemon = Arc::new(RwLock::new(daemon));
+
         let wallets = Self {
             wallet_dir,
             network,
@@ -367,6 +372,8 @@ impl Wallets {
             .await
             .context("Couldn't fetch blockchain height")?;
 
+        let daemon = self.daemon.read().await.clone();
+
         let wallet = Wallet::open_or_create_from_keys(
             wallet_path.clone(),
             None,
@@ -376,7 +383,7 @@ impl Wallets {
             spend_key,
             blockheight,
             false, // We don't sync the swap wallet, just import the transaction
-            self.daemon.clone(),
+            daemon,
         )
         .await
         .context(format!(
@@ -460,6 +467,18 @@ impl Wallets {
         })
     }
 
+    pub async fn change_monero_node(&self, new_daemon: Daemon) -> Result<()> {
+        {
+            let mut daemon = self.daemon.write().await;
+            *daemon = new_daemon.clone();
+        }
+
+        self.main_wallet
+            .call(move |wallet| wallet.set_daemon(&new_daemon))
+            .await?;
+        Ok(())
+    }
+
     /// Get the last 5 recently used wallets
     pub async fn get_recent_wallets(&self) -> Result<Vec<String>> {
         if let Some(db) = &self.wallet_database {