add traits::Signer::new so we can have a consistent way of creating S…

…igners

src/traits.rs

@@ -10,6 +10,16 @@ use crate::{
 
 /// A trait which provides a common `Signer` interface for `v1` and `v2`
 pub trait Signer {
+    /// Create a new `Signer`
+    fn new<RNG: RngCore + CryptoRng>(
+        party_id: u32,
+        key_ids: &[u32],
+        num_signers: u32,
+        num_keys: u32,
+        threshold: u32,
+        rng: &mut RNG,
+    ) -> Self;
+
     /// Get the signer ID for this signer
     fn get_id(&self) -> u32;
 

src/v1.rs

@@ -467,6 +467,17 @@ impl Signer {
 }
 
 impl traits::Signer for Signer {
+    fn new<RNG: RngCore + CryptoRng>(
+        party_id: u32,
+        key_ids: &[u32],
+        _num_signers: u32,
+        num_keys: u32,
+        threshold: u32,
+        rng: &mut RNG,
+    ) -> Self {
+        Signer::new(party_id, key_ids, num_keys, threshold, rng)
+    }
+
     fn get_id(&self) -> u32 {
         self.id
     }

src/v2.rs

@@ -420,7 +420,18 @@ pub type SignerState = PartyState;
 /// Typedef so we can use the same tokens for v1 and v2
 pub type Signer = Party;
 
-impl crate::traits::Signer for Party {
+impl traits::Signer for Party {
+    fn new<RNG: RngCore + CryptoRng>(
+        party_id: u32,
+        key_ids: &[u32],
+        num_signers: u32,
+        num_keys: u32,
+        threshold: u32,
+        rng: &mut RNG,
+    ) -> Self {
+        Party::new(party_id, key_ids, num_signers, num_keys, threshold, rng)
+    }
+
     fn get_id(&self) -> u32 {
         self.party_id
     }