Add ts-optchain and use it instead of lodash get

5 files changed, 53 insertions, 7 deletions

diff --git a/packages/instant/package.json b/packages/instant/package.json
index 35cc39d27..7203e3c96 100644
--- a/packages/instant/package.json
+++ b/packages/instant/package.json
@@ -56,7 +56,8 @@
         "react-dom": "^16.5.2",
         "react-redux": "^5.0.7",
         "redux": "^4.0.0",
-        "styled-components": "^3.4.9"
+        "styled-components": "^3.4.9",
+        "ts-optchain": "^0.1.1"
     },
     "devDependencies": {
         "@0xproject/tslint-config": "^1.0.8",
diff --git a/packages/instant/src/components/order_details.tsx b/packages/instant/src/components/order_details.tsx
index bd31bfba8..a15ff411b 100644
--- a/packages/instant/src/components/order_details.tsx
+++ b/packages/instant/src/components/order_details.tsx
@@ -2,6 +2,7 @@ import { BuyQuoteInfo } from '@0xproject/asset-buyer';
 import { BigNumber } from '@0xproject/utils';
 import * as _ from 'lodash';
 import * as React from 'react';
+import { oc } from 'ts-optchain';
 
 import { ColorOption } from '../style/theme';
 import { format } from '../util/format';
@@ -16,9 +17,10 @@ export interface OrderDetailsProps {
 export class OrderDetails extends React.Component<OrderDetailsProps> {
     public render(): React.ReactNode {
         const { buyQuoteInfo, ethUsdPrice } = this.props;
-        const ethAssetPrice = _.get(buyQuoteInfo, 'ethPerAssetPrice');
-        const ethTokenFee = _.get(buyQuoteInfo, 'feeEthAmount');
-        const totalEthAmount = _.get(buyQuoteInfo, 'totalEthAmount');
+        const buyQuoteAccessor = oc(buyQuoteInfo);
+        const ethAssetPrice = buyQuoteAccessor.ethPerAssetPrice();
+        const ethTokenFee = buyQuoteAccessor.feeEthAmount();
+        const totalEthAmount = buyQuoteAccessor.totalEthAmount();
         return (
             <Container padding="20px" width="100%">
                 <Container marginBottom="10px">
diff --git a/packages/instant/src/containers/latest_buy_quote_order_details.ts b/packages/instant/src/containers/latest_buy_quote_order_details.ts
index 77d84289b..b354c78fa 100644
--- a/packages/instant/src/containers/latest_buy_quote_order_details.ts
+++ b/packages/instant/src/containers/latest_buy_quote_order_details.ts
@@ -3,6 +3,7 @@ import { BigNumber } from '@0xproject/utils';
 import * as _ from 'lodash';
 import * as React from 'react';
 import { connect } from 'react-redux';
+import { oc } from 'ts-optchain';
 
 import { State } from '../redux/reducer';
 
@@ -17,7 +18,7 @@ interface ConnectedState {
 
 const mapStateToProps = (state: State, _ownProps: LatestBuyQuoteOrderDetailsProps): ConnectedState => ({
     // use the worst case quote info
-    buyQuoteInfo: _.get(state, 'latestBuyQuote.worstCaseQuoteInfo'),
+    buyQuoteInfo: oc(state).latestBuyQuote.worstCaseQuoteInfo(),
     ethUsdPrice: state.ethUsdPrice,
 });
 
diff --git a/packages/instant/src/containers/selected_asset_instant_heading.ts b/packages/instant/src/containers/selected_asset_instant_heading.ts
index a9e853fe1..c97cfe11a 100644
--- a/packages/instant/src/containers/selected_asset_instant_heading.ts
+++ b/packages/instant/src/containers/selected_asset_instant_heading.ts
@@ -2,6 +2,7 @@ import { BigNumber } from '@0xproject/utils';
 import * as _ from 'lodash';
 import * as React from 'react';
 import { connect } from 'react-redux';
+import { oc } from 'ts-optchain';
 
 import { State } from '../redux/reducer';
 
@@ -17,7 +18,7 @@ interface ConnectedState {
 
 const mapStateToProps = (state: State, _ownProps: InstantHeadingProps): ConnectedState => ({
     selectedAssetAmount: state.selectedAssetAmount,
-    totalEthBaseAmount: _.get(state, 'latestBuyQuote.worstCaseQuoteInfo.totalEthAmount'),
+    totalEthBaseAmount: oc(state).latestBuyQuote.worstCaseQuoteInfo.totalEthAmount(),
     ethUsdPrice: state.ethUsdPrice,
 });
 
diff --git a/yarn.lock b/yarn.lock
index 97a7d3ccf..7915f8aa0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1592,6 +1592,10 @@ aes-js@^0.2.3:
   version "0.2.4"
   resolved "https://registry.yarnpkg.com/aes-js/-/aes-js-0.2.4.tgz#94b881ab717286d015fa219e08fb66709dda5a3d"
 
+aes-js@^3.1.1:
+  version "3.1.1"
+  resolved "https://registry.npmjs.org/aes-js/-/aes-js-3.1.1.tgz#89fd1f94ae51b4c72d62466adc1a7323ff52f072"
+
 ajv-errors@^1.0.0:
   version "1.0.0"
   resolved "https://registry.npmjs.org/ajv-errors/-/ajv-errors-1.0.0.tgz#ecf021fa108fd17dfb5e6b383f2dd233e31ffc59"
@@ -2992,7 +2996,7 @@ bs-logger@0.x:
   dependencies:
     fast-json-stable-stringify "^2.0.0"
 
-bs58@=4.0.1:
+bs58@=4.0.1, bs58@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/bs58/-/bs58-4.0.1.tgz#be161e76c354f6f788ae4071f63f34e8c4f0a42a"
   dependencies:
@@ -3015,6 +3019,14 @@ bs58check@^1.0.8:
     bs58 "^3.1.0"
     create-hash "^1.1.0"
 
+bs58check@^2.1.2:
+  version "2.1.2"
+  resolved "https://registry.npmjs.org/bs58check/-/bs58check-2.1.2.tgz#53b018291228d82a5aa08e7d796fdafda54aebfc"
+  dependencies:
+    bs58 "^4.0.0"
+    create-hash "^1.1.0"
+    safe-buffer "^5.1.2"
+
 bser@^2.0.0:
   version "2.0.0"
   resolved "https://registry.npmjs.org/bser/-/bser-2.0.0.tgz#9ac78d3ed5d915804fd87acb158bc797147a1719"
@@ -5579,6 +5591,19 @@ ethereumjs-wallet@0.6.0:
     utf8 "^2.1.1"
     uuid "^2.0.1"
 
+ethereumjs-wallet@~0.6.0:
+  version "0.6.2"
+  resolved "https://registry.npmjs.org/ethereumjs-wallet/-/ethereumjs-wallet-0.6.2.tgz#67244b6af3e8113b53d709124b25477b64aeccda"
+  dependencies:
+    aes-js "^3.1.1"
+    bs58check "^2.1.2"
+    ethereumjs-util "^5.2.0"
+    hdkey "^1.0.0"
+    safe-buffer "^5.1.2"
+    scrypt.js "^0.2.0"
+    utf8 "^3.0.0"
+    uuid "^3.3.2"
+
 ethers@3.0.22:
   version "3.0.22"
   resolved "https://registry.yarnpkg.com/ethers/-/ethers-3.0.22.tgz#7fab1ea16521705837aa43c15831877b2716b436"
@@ -7073,6 +7098,14 @@ hdkey@^0.7.0, hdkey@^0.7.1:
     coinstring "^2.0.0"
     secp256k1 "^3.0.1"
 
+hdkey@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.npmjs.org/hdkey/-/hdkey-1.1.0.tgz#e74e7b01d2c47f797fa65d1d839adb7a44639f29"
+  dependencies:
+    coinstring "^2.0.0"
+    safe-buffer "^5.1.1"
+    secp256k1 "^3.0.1"
+
 he@1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/he/-/he-1.1.1.tgz#93410fd21b009735151f8868c2f271f3427e23fd"
@@ -14708,6 +14741,10 @@ ts-node@^7.0.0:
     source-map-support "^0.5.6"
     yn "^2.0.0"
 
+ts-optchain@^0.1.1:
+  version "0.1.1"
+  resolved "https://registry.npmjs.org/ts-optchain/-/ts-optchain-0.1.1.tgz#9d45e2c3fc6201c2f9be82edad4c76fefb2a36d9"
+
 tslib@1.9.0, tslib@^1.8.0, tslib@^1.8.1:
   version "1.9.0"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.0.tgz#e37a86fda8cbbaf23a057f473c9f4dc64e5fc2e8"
@@ -15216,6 +15253,10 @@ utf8@^2.1.1:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/utf8/-/utf8-2.1.2.tgz#1fa0d9270e9be850d9b05027f63519bf46457d96"
 
+utf8@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.npmjs.org/utf8/-/utf8-3.0.0.tgz#f052eed1364d696e769ef058b183df88c87f69d1"
+
 util-deprecate@~1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"