diff --git a/src/convert.js b/src/convert.js
index 0079145..5db63ab 100644
--- a/src/convert.js
+++ b/src/convert.js
@@ -1,74 +1,102 @@
-// convert to/from various values
+var base64map = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
 
-var base64map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-String.prototype.lpad = function(padString, length) {
-    var str = this;
+exports.lpad = function lpad(str, padString, length) {
     while (str.length < length) str = padString + str;
     return str;
 }
 
-// Convert a byte array to a hex string
-module.exports.bytesToHex = function(bytes) {
-    return bytes.map(function(x) { return x.toString(16).lpad('0',2) }).join('');
+/**
+ * Convert a byte array to a hex string
+ */
+exports.bytesToHex = function(bytes) {
+    return bytes.map(function(x) {
+        return exports.lpad(x.toString(16), '0', 2)
+    }).join('');
 };
 
-// Convert a hex string to a byte array
-module.exports.hexToBytes = function(hex) {
-    return hex.match(/../g).map(function(x) { return parseInt(x,16) });
+/**
+ * Convert a hex string to a byte array
+ */
+exports.hexToBytes = function(hex) {
+    return hex.match(/../g).map(function(x) {
+        return parseInt(x,16)
+    });
 }
 
-	// Convert a byte array to a base-64 string
-module.exports.bytesToBase64 = function(bytes) {
-
-		for(var base64 = [], i = 0; i < bytes.length; i += 3) {
-			var triplet = (bytes[i] << 16) | (bytes[i + 1] << 8) | bytes[i + 2];
-			for (var j = 0; j < 4; j++) {
-				if (i * 8 + j * 6 <= bytes.length * 8)
-					base64.push(base64map.charAt((triplet >>> 6 * (3 - j)) & 0x3F));
-				else base64.push("=");
-			}
-		}
-
-		return base64.join("");
+/**
+ * Convert a byte array to a base-64 string
+ */
+exports.bytesToBase64 = function(bytes) {
+    var base64 = []
+
+    for (var i = 0; i < bytes.length; i += 3) {
+        var triplet = (bytes[i] << 16) | (bytes[i + 1] << 8) | bytes[i + 2];
+
+        for (var j = 0; j < 4; j++) {
+            if (i * 8 + j * 6 <= bytes.length * 8) {
+                base64.push(base64map.charAt((triplet >>> 6 * (3 - j)) & 0x3F));
+            } else {
+                base64.push('=');
+            }
+        }
+    }
+
+    return base64.join('');
 }
 
-
-	// Convert a base-64 string to a byte array
-module.exports.base64ToBytes = function(base64) {
-
-		// Remove non-base-64 characters
-		base64 = base64.replace(/[^A-Z0-9+\/]/ig, "");
-
-		for (var bytes = [], i = 0, imod4 = 0; i < base64.length; imod4 = ++i % 4) {
-			if (imod4 == 0) continue;
-			bytes.push(((base64map.indexOf(base64.charAt(i - 1)) & (Math.pow(2, -2 * imod4 + 8) - 1)) << (imod4 * 2)) |
-			           (base64map.indexOf(base64.charAt(i)) >>> (6 - imod4 * 2)));
-		}
-
-		return bytes;
+/**
+ * Convert a base-64 string to a byte array
+ */
+exports.base64ToBytes = function(base64) {
+    // Remove non-base-64 characters
+    base64 = base64.replace(/[^A-Z0-9+\/]/ig, '');
+
+    var bytes = []
+    , imod4 = 0
+
+    for (var i = 0; i < base64.length; imod4 = ++i % 4) {
+        if (!imod4) continue
+
+        bytes.push(
+            (
+                (base64map.indexOf(base64.charAt(i - 1)) & (Math.pow(2, -2 * imod4 + 8) - 1)) <<
+                (imod4 * 2)
+            ) |
+                (base64map.indexOf(base64.charAt(i)) >>> (6 - imod4 * 2))
+        );
+    }
+
+    return bytes;
 }
 
-// Hex only (allowing bin would be potentially risky, as 01010101 = \x01 * 4 or 85)
-module.exports.coerceToBytes = function(input) {
-    if (typeof input == "string") return module.exports.hexToBytes(input);
-    return input;
+/**
+ * Hex only (allowing bin would be potentially risky, as 01010101 = \x01 * 4 or 85)
+ */
+exports.coerceToBytes = function(input) {
+    if (typeof input != 'string') return input
+    return exports.hexToBytes(input);
 }
 
-module.exports.binToBytes = function(bin) {
-    return bin.match(/......../g).map(function(x) { return parseInt(x,2) });
+exports.binToBytes = function(bin) {
+    return bin.match(/......../g).map(function(x) {
+        return parseInt(x,2)
+    });
 }
 
-module.exports.bytesToBin = function(bytes) {
-    return bytes.map(function(x) { return x.toString(2).lpad('0',8) }).join('');
+exports.bytesToBin = function(bytes) {
+    return bytes.map(function(x) {
+        return exports.lpad(x.toString(2), '0', 8)
+    }).join('');
 }
 
-module.exports.bytesToString = function(bytes) {
-    return bytes.map(function(x){ return String.fromCharCode(x) }).join('');
+exports.bytesToString = function(bytes) {
+    return bytes.map(function(x){
+        return String.fromCharCode(x)
+    }).join('');
 }
 
-module.exports.stringToBytes = function(string) {
-    return string.split('').map(function(x) { return x.charCodeAt(0) });
+exports.stringToBytes = function(string) {
+    return string.split('').map(function(x) {
+        return x.charCodeAt(0)
+    });
 }
-
-// utf8