Get rid of react-shared as a dependency, write own etherscanUtil

package.json

@@ -50,7 +50,7 @@
             },
             {
                 "path": "packages/instant/public/main.bundle.js",
-                "maxSize": "800kB"
+                "maxSize": "500kB"
             }
         ],
         "ci": {

packages/instant/package.json

@@ -46,7 +46,6 @@
     "dependencies": {
         "@0x/asset-buyer": "^2.1.0",
         "@0x/order-utils": "^2.0.0",
-        "@0x/react-shared": "^1.0.17",
         "@0x/types": "^1.2.0",
         "@0x/typescript-typings": "^3.0.3",
         "@0x/utils": "^2.0.3",

packages/instant/src/containers/selected_asset_view_transaction_button.tsx

@@ -1,4 +1,3 @@
-import { EtherscanLinkSuffixes, utils } from '@0x/react-shared';
 import * as _ from 'lodash';
 import * as React from 'react';
 import { connect } from 'react-redux';
@@ -7,6 +6,7 @@ import { State } from '../redux/reducer';
 
 import { ViewTransactionButton } from '../components/view_transaction_button';
 import { AsyncProcessState } from '../types';
+import { etherscanUtil } from '../util/etherscan';
 
 export interface SelectedAssetViewTransactionButtonProps {}
 
@@ -17,10 +17,9 @@ interface ConnectedState {
 const mapStateToProps = (state: State, _ownProps: {}): ConnectedState => ({
     onClick: () => {
         if (state.assetBuyer && state.buyOrderState.processState === AsyncProcessState.SUCCESS) {
-            const etherscanUrl = utils.getEtherScanLinkIfExists(
+            const etherscanUrl = etherscanUtil.getEtherScanTxnAddressIfExists(
                 state.buyOrderState.txnHash,
                 state.assetBuyer.networkId,
-                EtherscanLinkSuffixes.Tx,
             );
             if (etherscanUrl) {
                 window.open(etherscanUrl, '_blank');

packages/instant/src/util/etherscan.ts

@@ -0,0 +1,24 @@
+import * as _ from 'lodash';
+
+import { Network } from '../types';
+
+const etherscanPrefix = (networkId: number): string | undefined => {
+    switch (networkId) {
+        case Network.Kovan:
+            return 'kovan.';
+        case Network.Mainnet:
+            return '';
+        default:
+            return undefined;
+    }
+};
+
+export const etherscanUtil = {
+    getEtherScanTxnAddressIfExists: (txnHash: string, networkId: number) => {
+        const prefix = etherscanPrefix(networkId);
+        if (_.isUndefined(prefix)) {
+            return;
+        }
+        return `https://${prefix}etherscan.io/tx/${txnHash}`;
+    },
+};