Cli: Add resolve-signer subcommand (#8859)

* Expose remote-wallet device pretty path

* Add resolve-signer helpers

* Add cli resolve-signer subcommand

* Print pretty-path in waiting msg

clap-utils/src/keypair.rs

@@ -124,6 +124,51 @@ pub fn pubkey_from_path(
     }
 }
 
+pub fn resolve_signer_from_path(
+    matches: &ArgMatches,
+    path: &str,
+    keypair_name: &str,
+    wallet_manager: Option<&Arc<RemoteWalletManager>>,
+) -> Result<Option<String>, Box<dyn error::Error>> {
+    match parse_keypair_path(path) {
+        KeypairUrl::Ask => {
+            let skip_validation = matches.is_present(SKIP_SEED_PHRASE_VALIDATION_ARG.name);
+            // This method validates the seed phrase, but returns `None` because there is no path
+            // on disk or to a device
+            keypair_from_seed_phrase(keypair_name, skip_validation, false).map(|_| None)
+        }
+        KeypairUrl::Filepath(path) => match read_keypair_file(&path) {
+            Err(e) => Err(std::io::Error::new(
+                std::io::ErrorKind::Other,
+                format!("could not find keypair file: {} error: {}", path, e),
+            )
+            .into()),
+            Ok(_) => Ok(Some(path.to_string())),
+        },
+        KeypairUrl::Stdin => {
+            let mut stdin = std::io::stdin();
+            // This method validates the keypair from stdin, but returns `None` because there is no
+            // path on disk or to a device
+            read_keypair(&mut stdin).map(|_| None)
+        }
+        KeypairUrl::Usb(path) => {
+            if let Some(wallet_manager) = wallet_manager {
+                let path = generate_remote_keypair(
+                    path,
+                    wallet_manager,
+                    matches.is_present("confirm_key"),
+                    keypair_name,
+                )
+                .map(|keypair| keypair.path)?;
+                Ok(Some(path))
+            } else {
+                Err(RemoteWalletError::NoDeviceFound.into())
+            }
+        }
+        _ => Ok(Some(path.to_string())),
+    }
+}
+
 // Keyword used to indicate that the user should be asked for a keypair seed phrase
 pub const ASK_KEYWORD: &str = "ASK";