correctly calculate file downloaded progress

1 files changed, 4 insertions, 3 deletions

diff --git a/lib/file.js b/lib/file.js
index d9a10e0..abd4f5d 100644
--- a/lib/file.js
+++ b/lib/file.js
@@ -60,9 +60,10 @@ class File extends EventEmitter {
       }
     }
 
-    // We don't know the end offset, so return this.length if it's oversized.
-    // e.g. One small file can fit in the middle of a piece.
-    return Math.min(downloaded, this.length)
+    const irrelevantLastPieceBytes = pieceLength - ((this.offset + this.length) % pieceLength)
+    downloaded -= irrelevantLastPieceBytes
+
+    return downloaded
   }
 
   get progress () {