Use `equals` instead of manual comparison of last headers

src/daemon.rs

@@ -17,6 +17,7 @@ pub struct Daemon {
     url: String,
 }
 
+#[derive(Eq, PartialEq)]
 pub struct HeaderEntry {
     height: usize,
     hash: Sha256dHash,
@@ -42,8 +43,8 @@ pub struct HeaderList {
 }
 
 impl HeaderList {
-    pub fn best_header(&self) -> &BlockHeader {
-        &self.headers.last().unwrap().header
+    pub fn equals(&self, other: &HeaderList) -> bool {
+        self.headers.last() == other.headers.last()
     }
 
     pub fn headers(&self) -> &[HeaderEntry] {

src/index.rs

@@ -282,14 +282,15 @@ impl Index {
         current_headers: &'a HeaderList,
     ) -> Vec<&'a HeaderEntry> {
         if let Some(ref indexed_headers) = self.headers {
-            if current_headers.best_header() == indexed_headers.best_header() {
+            if current_headers.equals(indexed_headers) {
                 return Vec::new(); // everything was indexed already.
             }
         }
 
         let indexed_headers: HeaderMap = read_indexed_headers(&store);
         {
-            let best_block_header: &BlockHeader = current_headers.best_header();
+            let best_block_header: &BlockHeader =
+                current_headers.headers().last().unwrap().header();
             info!(
                 "got {} headers (indexed {}), best {} @ {}",
                 current_headers.headers().len(),