Implements Signer generic for validator client and epoch duties

validator_client/src/signer.rs

@@ -1,7 +1,32 @@
-use types::Signature;
+use std::fmt::Display;
+use types::{Keypair, PublicKey, Signature};
 
 /// Signs message using an internally-maintained private key.
-pub trait Signer {
+pub trait Signer: Display + Send + Sync {
     fn sign_block_proposal(&self, message: &[u8], domain: u64) -> Option<Signature>;
     fn sign_randao_reveal(&self, message: &[u8], domain: u64) -> Option<Signature>;
+    /// Returns a public key for the signer object.
+    fn to_public(&self) -> PublicKey;
+}
+
+/* Implements Display and Signer for Keypair */
+
+impl Signer for Keypair {
+    fn to_public(&self) -> PublicKey {
+        self.pk.clone()
+    }
+
+    fn sign_block_proposal(&self, message: &[u8], domain: u64) -> Option<Signature> {
+        Some(Signature::new(message, domain, &self.sk))
+    }
+
+    fn sign_randao_reveal(&self, message: &[u8], domain: u64) -> Option<Signature> {
+        Some(Signature::new(message, domain, &self.sk))
+    }
+
+    /*
+        fn sign_attestation_message(&self, message: &[u8], domain: u64) -> Option<Signature> {
+            Some(Signature::new(message, domain, &self.sk))
+    }
+    */
 }