expose buffer

index.js

@@ -11,6 +11,7 @@ privsec.address = require('./lib/address');
 privsec.base58 = require('./lib/base58');
 privsec.base58check = require('./lib/base58check');
 privsec.bn = require('./lib/bn');
+privsec.buffer = Buffer;
 privsec.constants = require('./lib/constants');
 privsec.hash = require('./lib/hash');
 privsec.point = require('./lib/point');