upgrade bigi & remove monkey patching

test/bigi.js

@@ -1,46 +0,0 @@
-var assert = require('assert')
-var BigInteger = require('../').BigInteger
-
-var fixtures = require('./fixtures/bigi')
-
-describe('BigInteger', function() {
-  describe('fromBuffer/fromHex', function() {
-    it('should match the test vectors', function() {
-      fixtures.valid.forEach(function(f) {
-        assert.equal(BigInteger.fromHex(f.hex).toString(), f.dec)
-        assert.equal(BigInteger.fromHex(f.hexPadded).toString(), f.dec)
-      })
-    })
-
-    fixtures.invalid.forEach(function(f) {
-      it('throws on ' + f.description, function() {
-        assert.throws(function() {
-          BigInteger.fromHex(f.string)
-        })
-      })
-    })
-  })
-
-  describe('toBuffer/toHex', function() {
-    it('should match the test vectors', function() {
-      fixtures.valid.forEach(function(f) {
-        var bi = new BigInteger(f.dec)
-
-        assert.equal(bi.toHex(), f.hex)
-        assert.equal(bi.toHex(32), f.hexPadded)
-      })
-    })
-
-    it('throws on non-finite padding value', function() {
-        var bi = new BigInteger('1')
-
-        assert.throws(function() { bi.toHex({}) })
-        assert.throws(function() { bi.toHex([]) })
-        assert.throws(function() { bi.toHex('') })
-        assert.throws(function() { bi.toHex(0 / 0) })
-        assert.throws(function() { bi.toHex(1 / 0) })
-    })
-  })
-})
-
-module.exports = BigInteger

test/ec.js

@@ -3,7 +3,7 @@ var assert = require('assert')
 var sec = require('../').sec
 var ecparams = sec('secp256k1')
 
-var BigInteger = require('..').BigInteger
+var BigInteger = require('bigi')
 var ECPointFp = require('../').ECPointFp
 
 describe('ec', function() {

test/ecdsa.js

@@ -4,7 +4,7 @@ var ecdsa = require('..').ecdsa
 var sec = require('..').sec
 var ecparams = sec("secp256k1")
 
-var BigInteger = require('..').BigInteger
+var BigInteger = require('bigi')
 var ECKey = require('..').ECKey
 var ECPubKey = require('..').ECPubKey
 var Message = require('..').Message