From 7c61b09dce6ea294013a4745895b58ad855817a0 Mon Sep 17 00:00:00 2001
From: Leonid Logvinov <logvinov.leon@gmail.com>
Date: Wed, 6 Sep 2017 17:29:15 +0200
Subject: Add zeroEx.exchange.throwLogErrorsAsErrors

---
 src/contract_wrappers/exchange_wrapper.ts | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'src')

diff --git a/src/contract_wrappers/exchange_wrapper.ts b/src/contract_wrappers/exchange_wrapper.ts
index 115bd1110..79b2ea582 100644
--- a/src/contract_wrappers/exchange_wrapper.ts
+++ b/src/contract_wrappers/exchange_wrapper.ts
@@ -26,6 +26,7 @@ import {
     LogErrorContractEventArgs,
     LogFillContractEventArgs,
     LogCancelContractEventArgs,
+    LogWithDecodedArgs,
 } from '../types';
 import {assert} from '../utils/assert';
 import {utils} from '../utils/utils';
@@ -46,6 +47,14 @@ export class ExchangeWrapper extends ContractWrapper {
     private _exchangeLogEventEmitters: ContractEventEmitter[];
     private _orderValidationUtils: OrderValidationUtils;
     private _tokenWrapper: TokenWrapper;
+    private _exchangeContractErrCodesToMsg = {
+        [ExchangeContractErrCodes.ERROR_FILL_EXPIRED]: ExchangeContractErrs.OrderFillExpired,
+        [ExchangeContractErrCodes.ERROR_CANCEL_EXPIRED]: ExchangeContractErrs.OrderFillExpired,
+        [ExchangeContractErrCodes.ERROR_FILL_NO_VALUE]: ExchangeContractErrs.OrderRemainingFillAmountZero,
+        [ExchangeContractErrCodes.ERROR_CANCEL_NO_VALUE]: ExchangeContractErrs.OrderRemainingFillAmountZero,
+        [ExchangeContractErrCodes.ERROR_FILL_TRUNCATION]: ExchangeContractErrs.OrderFillRoundingError,
+        [ExchangeContractErrCodes.ERROR_FILL_BALANCE_ALLOWANCE]: ExchangeContractErrs.FillBalanceAllowanceError,
+    };
     private static _getOrderAddressesAndValues(order: Order): [OrderAddresses, OrderValues] {
         const orderAddresses: OrderAddresses = [
             order.maker,
@@ -674,6 +683,20 @@ export class ExchangeWrapper extends ContractWrapper {
         );
         return isRoundingError;
     }
+    /**
+     * Checks if logs contain LogError, which is emited by Exchange contract on transfer failure
+     * and throws an appropriate error.
+     * @param   logsWithdecodedArgs   Transaction logs as returned by `zeroEx.awaitTransactionMinedAsync`
+     */
+    public throwLogErrorsAsErrors(logsWithdecodedArgs: LogWithDecodedArgs[]): void {
+        const errLog = _.find(logsWithdecodedArgs, {event: 'LogError'});
+        if (!_.isUndefined(errLog)) {
+            const logArgs: LogErrorContractEventArgs = errLog.args as any;
+            const errCode = logArgs.errorId.toNumber();
+            const errMessage = this._exchangeContractErrCodesToMsg[errCode];
+            throw new Error(errMessage);
+        }
+    }
     private async _invalidateContractInstancesAsync(): Promise<void> {
         await this.stopWatchingAllEventsAsync();
         delete this._exchangeContractIfExists;
-- 
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