add validator identity

quic-forward-proxy/src/validator_identity.rs

@@ -0,0 +1,45 @@
+use std::fmt::Display;
+use std::sync::Arc;
+use solana_sdk::pubkey::Pubkey;
+use solana_sdk::signature::Keypair;
+use solana_sdk::signer::Signer;
+
+#[derive(Clone)]
+pub struct ValidatorIdentity {
+    keypair: Option<Arc<Keypair>>,
+    dummy_keypair: Arc<Keypair>,
+}
+
+impl ValidatorIdentity {
+    pub fn new(keypair: Option<Keypair>) -> Self {
+        let dummy_keypair = Keypair::new();
+        ValidatorIdentity {
+            keypair: keypair.map(|kp| Arc::new(kp)),
+            dummy_keypair: Arc::new(dummy_keypair),
+        }
+    }
+
+    pub fn get_keypair_for_tls(&self) -> Arc<Keypair> {
+        match &self.keypair {
+            Some(keypair) => keypair.clone(),
+            None => self.dummy_keypair.clone(),
+        }
+    }
+
+    pub fn get_pubkey(&self) -> Pubkey {
+        let keypair = match &self.keypair {
+            Some(keypair) => keypair.clone(),
+            None => self.dummy_keypair.clone(),
+        };
+        keypair.pubkey()
+    }
+}
+
+impl Display for ValidatorIdentity {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match &self.keypair {
+            Some(keypair) => write!(f, "{}", keypair.pubkey().to_string()),
+            None => write!(f, "no keypair"),
+        }
+    }
+}