4 files changed, 17 insertions, 13 deletions
diff --git a/packages/web3-wrapper/src/index.ts b/packages/web3-wrapper/src/index.ts
index 9bef06fd4..679563a2b 100644
--- a/packages/web3-wrapper/src/index.ts
+++ b/packages/web3-wrapper/src/index.ts
@@ -1,7 +1,7 @@
 export { Web3Wrapper } from './web3_wrapper';
 export { marshaller } from './marshaller';
 
-export { AbiDecoder } from '@0xproject/utils';
+export { AbiDecoder } from '@0x/utils';
 
 export {
     BlockParam,
diff --git a/packages/web3-wrapper/src/marshaller.ts b/packages/web3-wrapper/src/marshaller.ts
index 572a322d6..299c6a64c 100644
--- a/packages/web3-wrapper/src/marshaller.ts
+++ b/packages/web3-wrapper/src/marshaller.ts
@@ -1,4 +1,4 @@
-import { addressUtils } from '@0xproject/utils';
+import { addressUtils } from '@0x/utils';
 import {
     BlockParam,
     BlockParamLiteral,
diff --git a/packages/web3-wrapper/src/utils.ts b/packages/web3-wrapper/src/utils.ts
index 0b568aac5..c68587632 100644
--- a/packages/web3-wrapper/src/utils.ts
+++ b/packages/web3-wrapper/src/utils.ts
@@ -1,4 +1,4 @@
-import { BigNumber } from '@0xproject/utils';
+import { BigNumber } from '@0x/utils';
 import * as _ from 'lodash';
 
 export const utils = {
diff --git a/packages/web3-wrapper/src/web3_wrapper.ts b/packages/web3-wrapper/src/web3_wrapper.ts
index 726246f1a..be1713f20 100644
--- a/packages/web3-wrapper/src/web3_wrapper.ts
+++ b/packages/web3-wrapper/src/web3_wrapper.ts
@@ -1,6 +1,6 @@
-import { assert } from '@0xproject/assert';
-import { schemas } from '@0xproject/json-schemas';
-import { AbiDecoder, addressUtils, BigNumber, intervalUtils, promisify } from '@0xproject/utils';
+import { assert } from '@0x/assert';
+import { schemas } from '@0x/json-schemas';
+import { AbiDecoder, addressUtils, BigNumber, intervalUtils, promisify } from '@0x/utils';
 import {
     BlockParam,
     BlockParamLiteral,
@@ -23,7 +23,13 @@ import {
 import * as _ from 'lodash';
 
 import { marshaller } from './marshaller';
-import { BlockWithoutTransactionDataRPC, BlockWithTransactionDataRPC, NodeType, Web3WrapperErrors } from './types';
+import {
+    BlockWithoutTransactionDataRPC,
+    BlockWithTransactionDataRPC,
+    NodeType,
+    TransactionRPC,
+    Web3WrapperErrors,
+} from './types';
 import { utils } from './utils';
 
 const BASE_TEN = 10;
@@ -145,13 +151,13 @@ export class Web3Wrapper {
         if (_.isUndefined((provider as any).sendAsync)) {
             // Web3@1.0 provider doesn't support synchronous http requests,
             // so it only has an async `send` method, instead of a `send` and `sendAsync` in web3@0.x.x`
-            // We re-assign the send method so that Web3@1.0 providers work with @0xproject/web3-wrapper
+            // We re-assign the send method so that Web3@1.0 providers work with @0x/web3-wrapper
             (provider as any).sendAsync = (provider as any).send;
         }
         this.abiDecoder = new AbiDecoder([]);
         this._provider = provider;
         this._txDefaults = txDefaults || {};
-        this._jsonRpcRequestId = 0;
+        this._jsonRpcRequestId = 1;
     }
     /**
      * Get the contract defaults set to the Web3Wrapper instance
@@ -228,10 +234,11 @@ export class Web3Wrapper {
      */
     public async getTransactionByHashAsync(txHash: string): Promise<Transaction> {
         assert.isHexString('txHash', txHash);
-        const transaction = await this.sendRawPayloadAsync<Transaction>({
+        const transactionRpc = await this.sendRawPayloadAsync<TransactionRPC>({
             method: 'eth_getTransactionByHash',
             params: [txHash],
         });
+        const transaction = marshaller.unmarshalTransaction(transactionRpc);
         return transaction;
     }
     /**
@@ -526,9 +533,6 @@ export class Web3Wrapper {
             method: 'eth_call',
             params: [callDataHex, marshalledDefaultBlock],
         });
-        if (rawCallResult === '0x') {
-            throw new Error('Contract call failed (returned null)');
-        }
         return rawCallResult;
     }
     /**