chore: add speculos feature around debug prints

Cargo.toml

@@ -32,3 +32,7 @@ icon = "crab_14x14.gif"
 
 [package.metadata.ledger.nanosplus]
 icon = "crab_14x14.gif"
+
+[features]
+default = []
+speculos = ["ledger_device_sdk/speculos"]

src/handlers/get_public_key.rs

@@ -24,6 +24,9 @@ use ledger_secure_sdk_sys::{
     cx_hash_no_throw, cx_hash_t, cx_keccak_init_no_throw, cx_sha3_t, CX_LAST, CX_OK,
 };
 
+#[cfg(feature = "speculos")]
+use ledger_device_sdk::testing;
+
 pub fn handler_get_public_key(comm: &mut Comm, display: bool) -> Result<(), AppSW> {
     let mut path = [0u32; MAX_ALLOWED_PATH_LEN];
     let data = comm.get_data().map_err(|_| AppSW::WrongApduLength)?;
@@ -58,7 +61,11 @@ pub fn handler_get_public_key(comm: &mut Comm, display: bool) -> Result<(), AppS
             }
         }
 
+        #[cfg(feature = "speculos")]
+        testing::debug_print("showing public key\n");
         if !ui_display_pk(&address)? {
+            #[cfg(feature = "speculos")]
+            testing::debug_print("denied\n");
             return Err(AppSW::Deny);
         }
     }

src/handlers/get_version.rs

@@ -17,8 +17,13 @@
 use crate::AppSW;
 use core::str::FromStr;
 use ledger_device_sdk::io;
+#[cfg(feature = "speculos")]
+use ledger_device_sdk::testing;
+
 
 pub fn handler_get_version(comm: &mut io::Comm) -> Result<(), AppSW> {
+    #[cfg(feature = "speculos")]
+    testing::debug_print("enter `handler_get_version` fn\n");
     if let Some((major, minor, patch)) = parse_version_string(env!("CARGO_PKG_VERSION")) {
         comm.append(&[major, minor, patch]);
         Ok(())

src/main.rs

@@ -37,6 +37,8 @@ use handlers::{
     sign_tx::{handler_sign_tx, TxContext},
 };
 use ledger_device_sdk::io::{ApduHeader, Comm, Event, Reply, StatusWords};
+#[cfg(feature = "speculos")]
+use ledger_device_sdk::testing;
 
 ledger_device_sdk::set_panic!(ledger_device_sdk::exiting_panic);
 
@@ -109,6 +111,8 @@ impl TryFrom<ApduHeader> for Instruction {
 
 #[no_mangle]
 extern "C" fn sample_main() {
+    #[cfg(feature = "speculos")]
+    testing::debug_print("enter `sample_main` fn\n\n");
     let mut comm = Comm::new();
 
     // display_pending_review(&mut comm);