ironfish round one wrapper for core frost (#4554)

.gitignore

@@ -20,6 +20,7 @@ testdbs
 .env.production.local
 */**/yarn.lock
 .idea
+.vscode
 
 # logs
 npm-debug.log*

ironfish-rust/src/frost_utils/mod.rs

@@ -0,0 +1,5 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+pub mod round_one;

ironfish-rust/src/frost_utils/round_one.rs

@@ -0,0 +1,56 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use ironfish_frost::frost::{
+    self,
+    keys::KeyPackage,
+    round1::{SigningCommitments, SigningNonces},
+};
+use rand::{rngs::StdRng, SeedableRng};
+
+// Small wrapper around frost::round1::commit that provides a seedable rng
+pub fn round_one(key_package: &KeyPackage, seed: u64) -> (SigningNonces, SigningCommitments) {
+    let mut rng = StdRng::seed_from_u64(seed);
+    frost::round1::commit(key_package.signing_share(), &mut rng)
+}
+
+#[cfg(test)]
+mod test {
+
+    use ff::Field;
+    use ironfish_frost::frost::keys::IdentifierList;
+    use jubjub::Fr;
+    use rand::rngs::ThreadRng;
+
+    use crate::transaction::{split_secret, SecretShareConfig};
+
+    #[test]
+    pub fn test_seed_provides_same_result() {
+        let seed = 100;
+        let key = Fr::random(&mut rand::thread_rng());
+
+        let mut rng = ThreadRng::default();
+        let key_packages = split_secret(
+            &SecretShareConfig {
+                max_signers: 3,
+                min_signers: 2,
+                secret: key.to_bytes().to_vec(),
+            },
+            IdentifierList::Default,
+            &mut rng,
+        )
+        .expect("key shares to be created");
+        let key_package = key_packages
+            .0
+            .into_iter()
+            .next()
+            .expect("key package to be created")
+            .1;
+        let (nonces, commitments) = super::round_one(&key_package, seed);
+        let (nonces2, commitments2) = super::round_one(&key_package, seed);
+        assert_eq!(nonces.hiding().serialize(), nonces2.hiding().serialize());
+        assert_eq!(nonces.binding().serialize(), nonces2.binding().serialize());
+        assert_eq!(commitments, commitments2);
+    }
+}

ironfish-rust/src/lib.rs

@@ -6,6 +6,7 @@ use blstrs::Bls12;
 
 pub mod assets;
 pub mod errors;
+pub mod frost_utils;
 pub mod keys;
 pub mod merkle_note;
 pub mod merkle_note_hash;