npm: allow the keypath to be a sequence of numbers too

The native representation of a bip32 keypath is a list of numbers, so
we should allow it for keypaths in addition to the "m/..." strings.

Author: benma

NPM_VERSION

@@ -1 +1 @@
-0.3.2
+0.4.0

src/keypath.rs

@@ -78,8 +78,35 @@ impl<'de> serde::Deserialize<'de> for Keypath {
     where
         D: serde::Deserializer<'de>,
     {
-        let s = String::deserialize(deserializer)?;
-        s.as_str().try_into().map_err(serde::de::Error::custom)
+        struct KeypathVisitor;
+
+        impl<'de> serde::de::Visitor<'de> for KeypathVisitor {
+            type Value = Keypath;
+
+            fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+                formatter.write_str("a string or a number sequence")
+            }
+
+            fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
+            where
+                E: serde::de::Error,
+            {
+                value.try_into().map_err(serde::de::Error::custom)
+            }
+
+            fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
+            where
+                A: serde::de::SeqAccess<'de>,
+            {
+                let mut vec = Vec::<u32>::new();
+                while let Some(elem) = seq.next_element()? {
+                    vec.push(elem);
+                }
+                Ok(Keypath(vec))
+            }
+        }
+
+        deserializer.deserialize_any(KeypathVisitor)
     }
 }
 

src/wasm/types.rs

@@ -15,7 +15,7 @@ type Product = 'unknown' | 'bitbox02-multi' | 'bitbox02-btconly';
 type BtcCoin = 'btc' | 'tbtc' | 'ltc' | 'tltc';
 type BtcFormatUnit = 'default' | 'sat';
 type XPubType = 'tpub' | 'xpub' | 'ypub' | 'zpub' | 'vpub' | 'upub' | 'Vpub' | 'Zpub' | 'Upub' | 'Ypub';
-type Keypath = string;
+type Keypath = string | number[];
 type XPub = string;
 type DeviceInfo = {
   name: string;