common cleanup

lib/const.js

@@ -25,9 +25,32 @@ if (process.env.NODE_ENV !== 'build') {
     var BigNumber = require('bignumber.js'); // jshint ignore:line
 }
 
+var ETH_UNITS = [ 
+    'wei', 
+    'Kwei', 
+    'Mwei', 
+    'Gwei', 
+    'szabo', 
+    'finney', 
+    'ether', 
+    'grand', 
+    'Mether', 
+    'Gether', 
+    'Tether', 
+    'Pether', 
+    'Eether', 
+    'Zether', 
+    'Yether', 
+    'Nether', 
+    'Dether', 
+    'Vether', 
+    'Uether' 
+];
+
 module.exports = {
     ETH_PADDING: 32,
     ETH_SIGNATURE_LENGTH: 4,
+    ETH_UNITS: ETH_UNITS,
     ETH_BIGNUMBER_ROUNDING_MODE: { ROUNDING_MODE: BigNumber.ROUND_DOWN }
 };