From 9a2438e0dcd35318f839d23debf539193ff50a44 Mon Sep 17 00:00:00 2001
From: Ethan Buchman <ethan@coinculture.info>
Date: Wed, 20 Sep 2017 02:48:04 -0400
Subject: [PATCH] common: Fingerprint comment

---
 common/byteslice.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/byteslice.go b/common/byteslice.go
index be828f065..ceaf06bd3 100644
--- a/common/byteslice.go
+++ b/common/byteslice.go
@@ -4,6 +4,9 @@ import (
 	"bytes"
 )
 
+// Fingerprint returns the first 6 bytes of a byte slice.
+// If the slice is less than 6 bytes, the fingerprint
+// contains trailing zeroes.
 func Fingerprint(slice []byte) []byte {
 	fingerprint := make([]byte, 6)
 	copy(fingerprint, slice)