WASM: add bindings for the primitive types

Added bindings for:

- `Scalar`
- `Fr`
- `ExtendedPoint`
- `SubgroupPoint`
- `Nullifier`
- `redjubjub::PrivateKey`
- `redjubjub::PublicKey`
- `redjubjub::Signature`

These are all structs that are required by transactions.

ironfish-rust-wasm/Cargo.toml

@@ -14,6 +14,11 @@ publish = false
 crate-type = ["cdylib"]
 
 [dependencies]
+blstrs = "0.6.0"
 getrandom = { version = "0.2.8", features = ["js"] } # need to explicitly enable the `js` feature in order to run in a browser
+group = "0.12.0"
 ironfish = { version = "0.3.0", path = "../ironfish-rust" }
+ironfish-jubjub = "0.1.0"
+ironfish_zkp = { version = "0.2.0", path = "../ironfish-zkp" }
+rand = "0.8.5"
 wasm-bindgen = "0.2.95"

ironfish-rust-wasm/src/lib.rs

@@ -10,3 +10,4 @@
 use getrandom as _;
 
 pub mod errors;
+pub mod primitives;

ironfish-rust-wasm/src/primitives.rs

@@ -0,0 +1,259 @@
+use crate::errors::IronfishError;
+use group::GroupEncoding;
+use ironfish::errors::IronfishErrorKind;
+use ironfish_zkp::redjubjub;
+use rand::thread_rng;
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug)]
+pub struct Scalar(blstrs::Scalar);
+
+#[wasm_bindgen]
+impl Scalar {
+    #[wasm_bindgen(js_name = toBytesBe)]
+    pub fn to_bytes_be(&self) -> Vec<u8> {
+        self.0.to_bytes_be().to_vec()
+    }
+
+    #[wasm_bindgen(js_name = toBytesLe)]
+    pub fn to_bytes_le(&self) -> Vec<u8> {
+        self.0.to_bytes_le().to_vec()
+    }
+}
+
+impl From<blstrs::Scalar> for Scalar {
+    fn from(s: blstrs::Scalar) -> Self {
+        Self(s)
+    }
+}
+
+impl AsRef<blstrs::Scalar> for Scalar {
+    fn as_ref(&self) -> &blstrs::Scalar {
+        &self.0
+    }
+}
+
+#[wasm_bindgen]
+#[derive(Default, Copy, Clone, PartialEq, Eq, Debug)]
+pub struct Fr(ironfish_jubjub::Fr);
+
+#[wasm_bindgen]
+impl Fr {
+    #[wasm_bindgen(js_name = toBytes)]
+    pub fn to_bytes(&self) -> Vec<u8> {
+        self.0.to_bytes().to_vec()
+    }
+}
+
+impl From<ironfish_jubjub::Fr> for Fr {
+    fn from(s: ironfish_jubjub::Fr) -> Self {
+        Self(s)
+    }
+}
+
+impl AsRef<ironfish_jubjub::Fr> for Fr {
+    fn as_ref(&self) -> &ironfish_jubjub::Fr {
+        &self.0
+    }
+}
+
+#[wasm_bindgen]
+#[derive(Default, Copy, Clone, PartialEq, Eq, Debug)]
+pub struct ExtendedPoint(ironfish_jubjub::ExtendedPoint);
+
+#[wasm_bindgen]
+impl ExtendedPoint {
+    #[wasm_bindgen(js_name = toBytes)]
+    pub fn to_bytes(&self) -> Vec<u8> {
+        self.0.to_bytes().to_vec()
+    }
+}
+
+impl From<ironfish_jubjub::ExtendedPoint> for ExtendedPoint {
+    fn from(s: ironfish_jubjub::ExtendedPoint) -> Self {
+        Self(s)
+    }
+}
+
+impl AsRef<ironfish_jubjub::ExtendedPoint> for ExtendedPoint {
+    fn as_ref(&self) -> &ironfish_jubjub::ExtendedPoint {
+        &self.0
+    }
+}
+
+#[wasm_bindgen]
+#[derive(Default, Copy, Clone, PartialEq, Eq, Debug)]
+pub struct SubgroupPoint(ironfish_jubjub::SubgroupPoint);
+
+#[wasm_bindgen]
+impl SubgroupPoint {
+    #[wasm_bindgen(js_name = toBytes)]
+    pub fn to_bytes(&self) -> Vec<u8> {
+        self.0.to_bytes().to_vec()
+    }
+}
+
+impl From<ironfish_jubjub::SubgroupPoint> for SubgroupPoint {
+    fn from(s: ironfish_jubjub::SubgroupPoint) -> Self {
+        Self(s)
+    }
+}
+
+impl AsRef<ironfish_jubjub::SubgroupPoint> for SubgroupPoint {
+    fn as_ref(&self) -> &ironfish_jubjub::SubgroupPoint {
+        &self.0
+    }
+}
+
+#[wasm_bindgen]
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+pub struct Nullifier(ironfish_zkp::Nullifier);
+
+#[wasm_bindgen]
+impl Nullifier {
+    #[wasm_bindgen(js_name = toBytes)]
+    pub fn to_bytes(&self) -> Vec<u8> {
+        self.0.to_vec()
+    }
+}
+
+impl From<ironfish_zkp::Nullifier> for Nullifier {
+    fn from(s: ironfish_zkp::Nullifier) -> Self {
+        Self(s)
+    }
+}
+
+impl AsRef<ironfish_zkp::Nullifier> for Nullifier {
+    fn as_ref(&self) -> &ironfish_zkp::Nullifier {
+        &self.0
+    }
+}
+
+#[wasm_bindgen]
+pub struct PrivateKey(redjubjub::PrivateKey);
+
+#[wasm_bindgen]
+impl PrivateKey {
+    #[wasm_bindgen(constructor)]
+    pub fn deserialize(bytes: &[u8]) -> Result<Self, IronfishError> {
+        let s = redjubjub::PrivateKey::read(bytes)?;
+        Ok(Self::from(s))
+    }
+
+    #[wasm_bindgen]
+    pub fn serialize(&self) -> Vec<u8> {
+        let mut buf = Vec::new();
+        self.0.write(&mut buf).expect("serialization failed");
+        buf
+    }
+
+    #[wasm_bindgen]
+    pub fn randomize(&self, alpha: &Fr) -> Self {
+        self.0.randomize(*alpha.as_ref()).into()
+    }
+
+    #[wasm_bindgen]
+    pub fn sign(&self, msg: &[u8], p_g: &SubgroupPoint) -> Signature {
+        self.0.sign(msg, &mut thread_rng(), *p_g.as_ref()).into()
+    }
+
+    #[wasm_bindgen(js_name = toPublicKey)]
+    pub fn to_public_key(&self, p_g: &SubgroupPoint) -> PublicKey {
+        redjubjub::PublicKey::from_private(self.as_ref(), *p_g.as_ref()).into()
+    }
+}
+
+impl From<redjubjub::PrivateKey> for PrivateKey {
+    fn from(p: redjubjub::PrivateKey) -> Self {
+        Self(p)
+    }
+}
+
+impl AsRef<redjubjub::PrivateKey> for PrivateKey {
+    fn as_ref(&self) -> &redjubjub::PrivateKey {
+        &self.0
+    }
+}
+
+#[wasm_bindgen]
+#[derive(Clone, Debug)]
+pub struct PublicKey(redjubjub::PublicKey);
+
+#[wasm_bindgen]
+impl PublicKey {
+    #[wasm_bindgen(constructor)]
+    pub fn deserialize(bytes: &[u8]) -> Result<Self, IronfishError> {
+        let s = redjubjub::PublicKey::read(bytes)?;
+        Ok(Self::from(s))
+    }
+
+    #[wasm_bindgen]
+    pub fn serialize(&self) -> Vec<u8> {
+        let mut buf = Vec::new();
+        self.0.write(&mut buf).expect("serialization failed");
+        buf
+    }
+
+    #[wasm_bindgen]
+    pub fn randomize(&self, alpha: &Fr, p_g: &SubgroupPoint) -> Self {
+        self.0.randomize(*alpha.as_ref(), *p_g.as_ref()).into()
+    }
+
+    #[wasm_bindgen]
+    pub fn verify(
+        &self,
+        msg: &[u8],
+        sig: &Signature,
+        p_g: &SubgroupPoint,
+    ) -> Result<(), IronfishError> {
+        self.0
+            .verify(msg, sig.as_ref(), *p_g.as_ref())
+            .then_some(())
+            .ok_or_else(|| IronfishErrorKind::InvalidSignature.into())
+    }
+}
+
+impl From<redjubjub::PublicKey> for PublicKey {
+    fn from(p: redjubjub::PublicKey) -> Self {
+        Self(p)
+    }
+}
+
+impl AsRef<redjubjub::PublicKey> for PublicKey {
+    fn as_ref(&self) -> &redjubjub::PublicKey {
+        &self.0
+    }
+}
+
+#[wasm_bindgen]
+#[derive(Clone, Debug)]
+pub struct Signature(redjubjub::Signature);
+
+#[wasm_bindgen]
+impl Signature {
+    #[wasm_bindgen(constructor)]
+    pub fn deserialize(bytes: &[u8]) -> Result<Self, IronfishError> {
+        let s = redjubjub::Signature::read(bytes)?;
+        Ok(Self::from(s))
+    }
+
+    #[wasm_bindgen]
+    pub fn serialize(&self) -> Vec<u8> {
+        let mut buf = Vec::new();
+        self.0.write(&mut buf).expect("serialization failed");
+        buf
+    }
+}
+
+impl From<redjubjub::Signature> for Signature {
+    fn from(s: redjubjub::Signature) -> Self {
+        Self(s)
+    }
+}
+
+impl AsRef<redjubjub::Signature> for Signature {
+    fn as_ref(&self) -> &redjubjub::Signature {
+        &self.0
+    }
+}