diff --git a/lib/encoding.js b/lib/encoding.js
index 8aabcca..da46725 100644
--- a/lib/encoding.js
+++ b/lib/encoding.js
@@ -1,24 +1,24 @@
 'use strict';
 
+// The purpose of this module is to abstract away
+// the parts that aren't vanilla js (for easy portability)
+// and to work with native JavaScript Uint8Arrays
+
 var Enc = module.exports;
 
 Enc.base64ToBuf = function (str) {
-  // node handles both base64 and urlBase64 equally
   return Buffer.from(str, 'base64');
 };
 
 Enc.bufToBase64 = function (u8) {
-  // Ensure a node buffer, even if TypedArray
   return Buffer.from(u8).toString('base64');
 };
 
 Enc.bufToBin = function (u8) {
-  // Ensure a node buffer, even if TypedArray
   return Buffer.from(u8).toString('binary');
 };
 
 Enc.bufToHex = function (u8) {
-  // Ensure a node buffer, even if TypedArray
   return Buffer.from(u8).toString('hex');
 };