payjoin-cli: Include err context on bitcoind fail (#251)

Simply wrapping an error and passing it up does not provide context to a
cli caller. Supplying enough context helps them diagnose the issue.

Author: DanGould

payjoin-cli/src/app/v1.rs

@@ -29,6 +29,9 @@ impl AppTrait for App {
     fn new(config: AppConfig) -> Result<Self> {
         let seen_inputs = Arc::new(Mutex::new(SeenInputs::new()?));
         let app = Self { config, seen_inputs };
+        app.bitcoind()?
+            .get_blockchain_info()
+            .context("Failed to connect to bitcoind. Check config RPC connection.")?;
         Ok(app)
     }
 

payjoin-cli/src/app/v2.rs

@@ -30,6 +30,9 @@ impl AppTrait for App {
         let receive_store = Arc::new(AsyncMutex::new(ReceiveStore::new()?));
         let send_store = Arc::new(AsyncMutex::new(SendStore::new()?));
         let app = Self { config, receive_store, send_store, seen_inputs };
+        app.bitcoind()?
+            .get_blockchain_info()
+            .context("Failed to connect to bitcoind. Check config RPC connection.")?;
         Ok(app)
     }