Handle tracker and db mutexes in main.rs

bdk_rpc_wallet_example/src/main.rs

@@ -25,7 +25,7 @@ fn main() -> anyhow::Result<()> {
     let rpc_url = "127.0.0.1:18443".to_string();
     let rpc_auth = ("user".to_string(), "password".to_string());
     let config = RpcConfig::new(rpc_url, rpc_auth, args.network);
-    let client = RpcClient::init_for_tracker(&config, &tracker.txout_index)?;
+    let client = RpcClient::init_for_tracker(&config, &tracker.lock().unwrap().txout_index)?;
 
     let rpc_cmd = match args.command {
         bdk_cli::Commands::ChainSpecific(rpc_cmd) => rpc_cmd,
@@ -45,6 +45,8 @@ fn main() -> anyhow::Result<()> {
         RpcCommands::Scan => {
             let mut keychain_changeset = KeychainChangeSet::default();
 
+            let mut tracker = tracker.lock().unwrap();
+
             let chain_update = client.wallet_scan(tracker.chain().checkpoints())?;
 
             let sparsechain_changeset = tracker.chain().determine_changeset(&chain_update)?;
@@ -70,6 +72,8 @@ fn main() -> anyhow::Result<()> {
 
             keychain_changeset.chain_graph = chaingraph_changeset;
 
+            let mut db = db.lock().unwrap();
+
             db.append_changeset(&keychain_changeset)?;
             tracker.apply_changeset(keychain_changeset);
         }