Make clear that transaction size is measured in virtual bytes

src/daemon.rs

@@ -37,12 +37,12 @@ pub struct Daemon {
 
 pub struct MempoolEntry {
     fee: u64,   // in satoshis
-    size: u32, // in bytes
+    vsize: u32, // in virtual bytes (= weight/4)
 }
 
 impl MempoolEntry {
-    pub fn fee_per_byte(&self) -> f32 {
-        self.fee as f32 / self.size as f32
+    pub fn fee_per_vbyte(&self) -> f32 {
+        self.fee as f32 / self.vsize as f32
     }
 }
 
@@ -198,7 +198,7 @@ impl Daemon {
                 .chain_err(|| "missing base fee")?
                 .as_f64()
                 .chain_err(|| "non-float fee")? * 100_000_000f64) as u64,
-            size: entry
+            vsize: entry
                 .get("size")
                 .chain_err(|| "missing size")?
                 .as_u64()

src/mempool.rs

@@ -49,7 +49,7 @@ impl<'a> Tracker<'a> {
                         continue;
                     }
                 };
-                debug!("new mempool tx: {}, {:.3}", txid, entry.fee_per_byte());
+                debug!("new tx: {}, {:.3}", txid, entry.fee_per_vbyte(),);
                 map_entry.insert(Stats { tx, entry });
             }
         }