Merge pull request #46 from 0xProject/order-hash-contract

Add getOrderHashHexUsingContractCallAsync

1 files changed, 6 insertions, 0 deletions

diff --git a/src/contract_wrappers/exchange_wrapper.ts b/src/contract_wrappers/exchange_wrapper.ts
index d144d8aad..9cb2332fe 100644
--- a/src/contract_wrappers/exchange_wrapper.ts
+++ b/src/contract_wrappers/exchange_wrapper.ts
@@ -342,6 +342,12 @@ export class ExchangeWrapper extends ContractWrapper {
         const orderHashHex = utils.getOrderHashHex(order, exchangeInstance.address);
         return orderHashHex;
     }
+    private async getOrderHashHexUsingContractCallAsync(order: Order|SignedOrder): Promise<string> {
+        const exchangeInstance = await this.getExchangeContractAsync();
+        const [orderAddresses, orderValues] = ExchangeWrapper.getOrderAddressesAndValues(order);
+        const orderHashHex = await exchangeInstance.getOrderHash.call(orderAddresses, orderValues);
+        return orderHashHex;
+    }
     private async stopWatchingExchangeLogEventsAsync() {
         const stopWatchingPromises = _.map(this.exchangeLogEventObjs, logEventObj => {
             return promisify(logEventObj.stopWatching, logEventObj)();