gui: Daemon trait => add receive and change indexes to GetInfoResult

liana-gui/src/app/state/psbt.rs

@@ -754,6 +754,8 @@ mod tests {
                     "block_height": 1000,
                     "sync": 1.0,
                     "descriptors": { "main": LianaDescriptor::from_str(DESC).unwrap() },
+                    "receive_index": 4,
+                    "change_index": 3,
                     "timestamp": 1000,
                 })),
             ),

liana-gui/src/lianalite/client/backend/api.rs

@@ -105,6 +105,8 @@ pub struct Wallet {
     pub name: String,
     #[serde(deserialize_with = "deser_fromstr")]
     pub descriptor: LianaDescriptor,
+    pub deposit_derivation_index: u32,
+    pub change_derivation_index: u32,
     pub recovery_paths: Vec<RecoveryPath>,
     pub biggest_remaining_sequence: Option<u32>,
     pub smallest_remaining_sequence: Option<u32>,

liana-gui/src/lianalite/client/backend/mod.rs

@@ -594,6 +594,8 @@ impl Daemon for BackendWalletClient {
             timestamp: wallet.created_at as u32,
             // We can ignore this field for remote backend as the wallet should remain synced.
             last_poll_timestamp: None,
+            receive_index: wallet.deposit_derivation_index,
+            change_index: wallet.change_derivation_index,
         })
     }
 

lianad/src/commands/mod.rs

@@ -314,6 +314,8 @@ impl DaemonControl {
         let mut db_conn = self.db.connection();
         let block_height = db_conn.chain_tip().map(|tip| tip.height).unwrap_or(0);
         let wallet = db_conn.wallet();
+        let receive_index: u32 = db_conn.receive_index().into();
+        let change_index: u32 = db_conn.change_index().into();
         let rescan_progress = wallet
             .rescan_timestamp
             .map(|_| self.bitcoin.rescan_progress().unwrap_or(1.0));
@@ -328,6 +330,8 @@ impl DaemonControl {
             rescan_progress,
             timestamp: wallet.timestamp,
             last_poll_timestamp: wallet.last_poll_timestamp,
+            receive_index,
+            change_index,
         }
     }
 
@@ -1168,6 +1172,10 @@ pub struct GetInfoResult {
     pub timestamp: u32,
     /// Timestamp of last poll, if any.
     pub last_poll_timestamp: Option<u32>,
+    /// Last index used to generate a receive address
+    pub receive_index: u32,
+    /// Last index used to generate a change address
+    pub change_index: u32,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]