Introduce ethereum-types package

packages/base-contract/package.json

@@ -42,7 +42,7 @@
         "typescript": "2.7.1"
     },
     "dependencies": {
-        "@0xproject/types": "^0.7.0",
+        "ethereum-types": "^0.0.1",
         "@0xproject/typescript-typings": "^0.3.2",
         "@0xproject/utils": "^0.6.2",
         "@0xproject/web3-wrapper": "^0.6.4",

packages/base-contract/src/index.ts

@@ -1,3 +1,5 @@
+import { abiUtils, BigNumber } from '@0xproject/utils';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import {
     AbiDefinition,
     AbiType,
@@ -8,9 +10,7 @@ import {
     Provider,
     TxData,
     TxDataPayable,
-} from '@0xproject/types';
-import { abiUtils, BigNumber } from '@0xproject/utils';
-import { Web3Wrapper } from '@0xproject/web3-wrapper';
+} from 'ethereum-types';
 import * as ethers from 'ethers';
 import * as _ from 'lodash';
 

packages/base-contract/src/utils.ts

@@ -1,4 +1,4 @@
-import { DataItem } from '@0xproject/types';
+import { DataItem } from 'ethereum-types';
 import * as _ from 'lodash';
 
 // tslint:disable-next-line:completed-docs