Pipe all Claim constructors through a function

src/accountant.rs

@@ -49,7 +49,7 @@ impl Accountant {
     }
 
     pub fn deposit_signed(self: &mut Self, to: PublicKey, data: u64, sig: Signature) -> Result<()> {
-        let event = Event::Claim { to, data, sig };
+        let event = Event::new_claim(to, data, sig);
         if !self.historian.verify_event(&event) {
             return Err(AccountingError::InvalidEvent);
         }

src/bin/demo.rs

@@ -11,11 +11,7 @@ fn create_log(hist: &Historian<Sha256Hash>) -> Result<(), SendError<Event<Sha256
     sleep(Duration::from_millis(15));
     let data = Sha256Hash::default();
     let keypair = generate_keypair();
-    let event0 = Event::Claim {
-        to: get_pubkey(&keypair),
-        data,
-        sig: sign_serialized(&data, &keypair),
-    };
+    let event0 = Event::new_claim(get_pubkey(&keypair), data, sign_serialized(&data, &keypair));
     hist.sender.send(event0)?;
     sleep(Duration::from_millis(10));
     Ok(())

src/event.rs

@@ -42,6 +42,12 @@ pub enum Event<T> {
     },
 }
 
+impl<T> Event<T> {
+    pub fn new_claim(to: PublicKey, data: T, sig: Signature) -> Self {
+        Event::Claim { to, data, sig }
+    }
+}
+
 /// Return a new ED25519 keypair
 pub fn generate_keypair() -> Ed25519KeyPair {
     use ring::{rand, signature};

src/historian.rs

@@ -215,11 +215,7 @@ mod tests {
     fn test_bad_event_signature() {
         let keypair = generate_keypair();
         let sig = sign_serialized(&hash(b"hello, world"), &keypair);
-        let event0 = Event::Claim {
-            to: get_pubkey(&keypair),
-            data: hash(b"goodbye cruel world"),
-            sig,
-        };
+        let event0 = Event::new_claim(get_pubkey(&keypair), hash(b"goodbye cruel world"), sig);
         let mut sigs = HashSet::new();
         assert!(!verify_event_and_reserve_signature(&mut sigs, &event0));
         assert!(!sigs.contains(&sig));
@@ -231,7 +227,7 @@ mod tests {
         let to = get_pubkey(&keypair);
         let data = &hash(b"hello, world");
         let sig = sign_serialized(data, &keypair);
-        let event0 = Event::Claim { to, data, sig };
+        let event0 = Event::new_claim(to, data, sig);
         let mut sigs = HashSet::new();
         assert!(verify_event_and_reserve_signature(&mut sigs, &event0));
         assert!(!verify_event_and_reserve_signature(&mut sigs, &event0));

src/log.rs

@@ -209,24 +209,15 @@ mod tests {
         let zero = Sha256Hash::default();
         let one = hash(&zero);
 
-        // First, verify Claim events
+        // First, verify entries
         let keypair = generate_keypair();
-        let event0 = Event::Claim {
-            to: get_pubkey(&keypair),
-            data: zero,
-            sig: sign_serialized(&zero, &keypair),
-        };
-
-        let event1 = Event::Claim {
-            to: get_pubkey(&keypair),
-            data: one,
-            sig: sign_serialized(&one, &keypair),
-        };
+        let event0 = Event::new_claim(get_pubkey(&keypair), zero, sign_serialized(&zero, &keypair));
+        let event1 = Event::new_claim(get_pubkey(&keypair), one, sign_serialized(&one, &keypair));
         let events = vec![event0, event1];
         let mut entries = create_entries(&zero, 0, events);
         assert!(verify_slice(&entries, &zero));
 
-        // Next, swap two Claim events and ensure verification fails.
+        // Next, swap two events and ensure verification fails.
         let event0 = entries[0].event.clone();
         let event1 = entries[1].event.clone();
         entries[0].event = event1;
@@ -238,11 +229,7 @@ mod tests {
     fn test_claim() {
         let keypair = generate_keypair();
         let data = hash(b"hello, world");
-        let event0 = Event::Claim {
-            to: get_pubkey(&keypair),
-            data,
-            sig: sign_serialized(&data, &keypair),
-        };
+        let event0 = Event::new_claim(get_pubkey(&keypair), data, sign_serialized(&data, &keypair));
         let zero = Sha256Hash::default();
         let entries = create_entries(&zero, 0, vec![event0]);
         assert!(verify_slice(&entries, &zero));
@@ -251,11 +238,11 @@ mod tests {
     #[test]
     fn test_wrong_data_claim_attack() {
         let keypair = generate_keypair();
-        let event0 = Event::Claim {
-            to: get_pubkey(&keypair),
-            data: hash(b"goodbye cruel world"),
-            sig: sign_serialized(&hash(b"hello, world"), &keypair),
-        };
+        let event0 = Event::new_claim(
+            get_pubkey(&keypair),
+            hash(b"goodbye cruel world"),
+            sign_serialized(&hash(b"hello, world"), &keypair),
+        );
         let zero = Sha256Hash::default();
         let entries = create_entries(&zero, 0, vec![event0]);
         assert!(!verify_slice(&entries, &zero));