1 files changed, 4 insertions, 6 deletions
diff --git a/packages/0x.js/src/contract_wrappers/exchange_wrapper.ts b/packages/0x.js/src/contract_wrappers/exchange_wrapper.ts
index 2b6117729..fceab851a 100644
--- a/packages/0x.js/src/contract_wrappers/exchange_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/exchange_wrapper.ts
@@ -1,5 +1,6 @@
 import { schemas } from '@0xproject/json-schemas';
-import { BigNumber } from '@0xproject/utils';
+import { DecodedLogArgs, LogWithDecodedArgs } from '@0xproject/types';
+import { AbiDecoder, BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
 import * as Web3 from 'web3';
@@ -8,7 +9,6 @@ import { artifacts } from '../artifacts';
 import {
     BlockParamLiteral,
     BlockRange,
-    DecodedLogArgs,
     ECSignature,
     EventCallback,
     ExchangeContractErrCodes,
@@ -17,7 +17,6 @@ import {
     ExchangeEvents,
     IndexedFilterValues,
     LogErrorContractEventArgs,
-    LogWithDecodedArgs,
     MethodOpts,
     Order,
     OrderAddresses,
@@ -28,7 +27,6 @@ import {
     SignedOrder,
     ValidateOrderFillableOpts,
 } from '../types';
-import { AbiDecoder } from '../utils/abi_decoder';
 import { assert } from '../utils/assert';
 import { decorators } from '../utils/decorators';
 import { ExchangeTransferSimulator } from '../utils/exchange_transfer_simulator';
@@ -846,9 +844,9 @@ export class ExchangeWrapper extends ContractWrapper {
     public throwLogErrorsAsErrors(logs: Array<LogWithDecodedArgs<DecodedLogArgs> | Web3.LogEntry>): void {
         const errLog = _.find(logs, {
             event: ExchangeEvents.LogError,
-        }) as LogWithDecodedArgs<LogErrorContractEventArgs> | undefined;
+        });
         if (!_.isUndefined(errLog)) {
-            const logArgs = errLog.args;
+            const logArgs = (errLog as LogWithDecodedArgs<LogErrorContractEventArgs>).args;
             const errCode = logArgs.errorId.toNumber();
             const errMessage = this._exchangeContractErrCodesToMsg[errCode];
             throw new Error(errMessage);