3 files changed, 17 insertions, 22 deletions
diff --git a/packages/migrations/src/migration.ts b/packages/migrations/src/migration.ts
index be899cc65..4827328fc 100644
--- a/packages/migrations/src/migration.ts
+++ b/packages/migrations/src/migration.ts
@@ -1,10 +1,8 @@
 import { Deployer } from '@0xproject/deployer';
-import { BigNumber } from '@0xproject/utils';
+import { BigNumber, NULL_BYTES } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
 
-import { constants } from './utils/constants';
-
 import { ContractName } from './types';
 import { tokenInfo } from './utils/token_info';
 
@@ -51,8 +49,8 @@ export const runMigrationsAsync = async (deployer: Deployer) => {
         '0x Protocol Token',
         'ZRX',
         18,
-        constants.NULL_BYTES,
-        constants.NULL_BYTES,
+        NULL_BYTES,
+        NULL_BYTES,
         {
             from: owner,
             gas: addTokenGasEstimate,
@@ -63,8 +61,8 @@ export const runMigrationsAsync = async (deployer: Deployer) => {
         'Ether Token',
         'WETH',
         18,
-        constants.NULL_BYTES,
-        constants.NULL_BYTES,
+        NULL_BYTES,
+        NULL_BYTES,
         {
             from: owner,
             gas: addTokenGasEstimate,
diff --git a/packages/migrations/src/utils/constants.ts b/packages/migrations/src/utils/constants.ts
deleted file mode 100644
index 8871a470d..000000000
--- a/packages/migrations/src/utils/constants.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export const constants = {
-    NULL_BYTES: '0x',
-};
diff --git a/packages/migrations/src/utils/token_info.ts b/packages/migrations/src/utils/token_info.ts
index f2ca3e8b3..968665c7d 100644
--- a/packages/migrations/src/utils/token_info.ts
+++ b/packages/migrations/src/utils/token_info.ts
@@ -1,41 +1,41 @@
-import { Token } from '../types';
+import { NULL_BYTES } from '@0xproject/utils';
 
-import { constants } from './constants';
+import { Token } from '../types';
 
 export const tokenInfo: Token[] = [
     {
         name: 'Augur Reputation Token',
         symbol: 'REP',
         decimals: 18,
-        ipfsHash: constants.NULL_BYTES,
-        swarmHash: constants.NULL_BYTES,
+        ipfsHash: NULL_BYTES,
+        swarmHash: NULL_BYTES,
     },
     {
         name: 'Digix DAO Token',
         symbol: 'DGD',
         decimals: 18,
-        ipfsHash: constants.NULL_BYTES,
-        swarmHash: constants.NULL_BYTES,
+        ipfsHash: NULL_BYTES,
+        swarmHash: NULL_BYTES,
     },
     {
         name: 'Golem Network Token',
         symbol: 'GNT',
         decimals: 18,
-        ipfsHash: constants.NULL_BYTES,
-        swarmHash: constants.NULL_BYTES,
+        ipfsHash: NULL_BYTES,
+        swarmHash: NULL_BYTES,
     },
     {
         name: 'MakerDAO',
         symbol: 'MKR',
         decimals: 18,
-        ipfsHash: constants.NULL_BYTES,
-        swarmHash: constants.NULL_BYTES,
+        ipfsHash: NULL_BYTES,
+        swarmHash: NULL_BYTES,
     },
     {
         name: 'Melon Token',
         symbol: 'MLN',
         decimals: 18,
-        ipfsHash: constants.NULL_BYTES,
-        swarmHash: constants.NULL_BYTES,
+        ipfsHash: NULL_BYTES,
+        swarmHash: NULL_BYTES,
     },
 ];