fix ledger client: no duplicate keys

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "async-hwi"
-version = "0.0.9"
+version = "0.0.10"
 edition = "2018"
 description = "Async hardware wallet interface"
 authors = ["Edouard Paris <[email protected]>"]
@@ -28,7 +28,7 @@ serialport = { version = "4.2", optional = true }
 
 # ledger
 regex = { version = "1.6.0", optional = true }
-ledger_bitcoin_client = { version = "0.3.1", optional = true }
+ledger_bitcoin_client = { version = "0.3.2", optional = true }
 ledger-apdu = { version = "0.10", optional = true }
 ledger-transport-hid = { version = "0.10", optional = true }
 hidapi = { version = "1.4.1", features = ["linux-static-hidraw"], default-features = false, optional = true }

src/ledger.rs

@@ -150,9 +150,11 @@ pub fn extract_keys_and_template(policy: &str) -> Result<(String, Vec<WalletPubK
     let mut descriptor_template = policy.to_string();
     let mut pubkeys: Vec<WalletPubKey> = Vec::new();
     for (index, capture) in re.find_iter(policy).enumerate() {
-        pubkeys.push(
-            WalletPubKey::from_str(capture.as_str()).map_err(|_| HWIError::UnsupportedInput)?,
-        );
+        let pubkey =
+            WalletPubKey::from_str(capture.as_str()).map_err(|_| HWIError::UnsupportedInput)?;
+        if !pubkeys.contains(&pubkey) {
+            pubkeys.push(pubkey);
+        }
         descriptor_template = descriptor_template.replace(capture.as_str(), &format!("@{}", index));
     }