From 755c980a56385f2fe4198b5d4a312d7af0eab02c Mon Sep 17 00:00:00 2001
From: Fabio Berger <me@fabioberger.com>
Date: Thu, 25 May 2017 10:58:40 +0200
Subject: Add assertions library and add them for all function args

---
 src/ts/0x.js.ts | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/ts/0x.js.ts')

diff --git a/src/ts/0x.js.ts b/src/ts/0x.js.ts
index dd67c49a0..acbdd01e2 100644
--- a/src/ts/0x.js.ts
+++ b/src/ts/0x.js.ts
@@ -1,4 +1,6 @@
+import * as BigNumber from 'bignumber.js';
 import * as ethUtil from 'ethereumjs-util';
+import {assert} from './utils/assert';
 
 /**
  * Elliptic Curve signature
@@ -15,6 +17,10 @@ export class ZeroEx {
      * by signing `data` with the private key corresponding to the `signer` address.
      */
     public static isValidSignature(data: string, signature: ECSignature, signer: ETHAddressHex): boolean {
+        assert.isString('data', data);
+        assert.isObject('signature', signature);
+        assert.isETHAddressHex('signer', signer);
+
         const dataBuff = ethUtil.toBuffer(data);
         const msgHashBuff = ethUtil.hashPersonalMessage(dataBuff);
         try {
-- 
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