chore: downgrade some noisy log lines from debug to trace

lib/src/device.rs

@@ -158,9 +158,12 @@ impl<T: Exchange + Send> Device for T {
         }
 
         // Decode response data - status bytes
+        // NOTE: the `comm.tx`` vs. `comm.tx_length` distinction in io_legacy can
+        // result in some unexpected behaviour when trying to send status bytes.
+        // see: https://github.com/LedgerHQ/ledger-device-rust-sdk/issues/431
         let (resp, _) = RESP::decode(&buff[..n - 2])?;
 
-        debug!("RX: {resp:?}");
+        debug!("RX: {resp:02x?}");
 
         // Return decode response
         Ok(resp)

lib/src/provider/context.rs

@@ -5,7 +5,7 @@ use tokio::{
     sync::mpsc::{unbounded_channel, UnboundedReceiver, UnboundedSender},
     task::LocalSet,
 };
-use tracing::{debug, error, warn};
+use tracing::{debug, error, trace, warn};
 
 use crate::{
     error::Error,
@@ -107,10 +107,10 @@ impl ProviderImpl {
 
         // Poll on incoming requests
         while let Some((req, tx)) = self.req_rx.recv().await {
-            debug!("LedgerProvider request: {:02x?}", req);
+            trace!("LedgerProvider request: {:02x?}", req);
 
             if let Some(resp) = self.handle_req(&req).await {
-                debug!("LedgerProvider response: {:02x?}", resp);
+                trace!("LedgerProvider response: {:02x?}", resp);
 
                 if let Err(e) = tx.send(resp) {
                     error!("Failed to forward response: {}", e);

lib/src/transport/ble.rs

@@ -100,7 +100,7 @@ impl BleTransport {
                     }
                 };
 
-                debug!("Peripheral: {p:?} props: {properties:?}");
+                trace!("Peripheral: {p:?} props: {properties:?}");
 
                 let Some(model) = properties
                     .services

lib/src/transport/usb.rs

@@ -257,7 +257,9 @@ impl UsbDevice {
 
         // Check read length is valid for following operations
         if n == 0 {
-            error!("Empty response");
+            // NOTE: this can happen when interacting with the new touch devices in
+            // situations that are not -strictly- errors.
+            debug!("Empty response");
             return Err(Error::EmptyResponse);
         } else if n < 7 {
             error!("Unexpected read length {n}");