1 files changed, 9 insertions, 3 deletions
diff --git a/src/ts/0x.js.ts b/src/ts/0x.js.ts
index 1cc2d8b44..d189b48b1 100644
--- a/src/ts/0x.js.ts
+++ b/src/ts/0x.js.ts
@@ -13,18 +13,19 @@ export interface ECSignature {
 }
 
 const MAX_DIGITS_IN_UNSIGNED_256_INT = 78;
+const ORDER_HASH_LENGTH = 66;
 
 export class ZeroEx {
     /**
      * Verifies that the elliptic curve signature `signature` was generated
      * 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);
+    public static isValidSignature(dataHex: string, signature: ECSignature, signer: ETHAddressHex): boolean {
+        assert.isHexString('dataHex', dataHex);
         assert.doesConformToSchema('signature', signature, ECSignatureSchema);
         assert.isETHAddressHex('signer', signer);
 
-        const dataBuff = ethUtil.toBuffer(data);
+        const dataBuff = ethUtil.toBuffer(dataHex);
         const msgHashBuff = ethUtil.hashPersonalMessage(dataBuff);
         try {
             const pubKey = ethUtil.ecrecover(msgHashBuff,
@@ -50,4 +51,9 @@ export class ZeroEx {
         const salt = randomNumber.times(factor).round();
         return salt;
     }
+    /** Checks if order hash is valid */
+    public static isValidOrderHash(orderHash: string): boolean {
+        assert.isHexString('orderHash', orderHash);
+        return orderHash.length === ORDER_HASH_LENGTH;
+    }
 }