feat(instant): add token symbol to buy button text

packages/instant/src/components/buy_button.tsx

@@ -1,4 +1,5 @@
 import { AssetBuyer, AssetBuyerError, BuyQuote } from '@0x/asset-buyer';
+import { AssetProxyId } from '@0x/types';
 import { BigNumber } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as _ from 'lodash';
@@ -7,7 +8,7 @@ import { oc } from 'ts-optchain';
 
 import { WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX } from '../constants';
 import { ColorOption } from '../style/theme';
-import { AffiliateInfo, ZeroExInstantError } from '../types';
+import { AffiliateInfo, Asset, ZeroExInstantError } from '../types';
 import { analytics } from '../util/analytics';
 import { gasPriceEstimator } from '../util/gas_price_estimator';
 import { util } from '../util/util';
@@ -21,6 +22,7 @@ export interface BuyButtonProps {
     assetBuyer: AssetBuyer;
     web3Wrapper: Web3Wrapper;
     affiliateInfo?: AffiliateInfo;
+    selectedAsset?: Asset;
     onValidationPending: (buyQuote: BuyQuote) => void;
     onValidationFail: (buyQuote: BuyQuote, errorMessage: AssetBuyerError | ZeroExInstantError) => void;
     onSignatureDenied: (buyQuote: BuyQuote) => void;
@@ -36,8 +38,12 @@ export class BuyButton extends React.Component<BuyButtonProps> {
         onBuyFailure: util.boundNoop,
     };
     public render(): React.ReactNode {
-        const { buyQuote, accountAddress } = this.props;
+        const { buyQuote, accountAddress, selectedAsset } = this.props;
         const shouldDisableButton = _.isUndefined(buyQuote) || _.isUndefined(accountAddress);
+        const buttonText =
+            !_.isUndefined(selectedAsset) && selectedAsset.metaData.assetProxyId === AssetProxyId.ERC20
+                ? `Buy ${selectedAsset.metaData.symbol.toUpperCase()}`
+                : 'Buy Now';
         return (
             <Button
                 width="100%"
@@ -45,7 +51,7 @@ export class BuyButton extends React.Component<BuyButtonProps> {
                 isDisabled={shouldDisableButton}
                 fontColor={ColorOption.white}
             >
-                Buy
+                {buttonText}
             </Button>
         );
     }

packages/instant/src/components/buy_order_state_buttons.tsx

@@ -4,7 +4,7 @@ import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as React from 'react';
 
 import { ColorOption } from '../style/theme';
-import { AffiliateInfo, OrderProcessState, ZeroExInstantError } from '../types';
+import { AffiliateInfo, Asset, OrderProcessState, ZeroExInstantError } from '../types';
 
 import { BuyButton } from './buy_button';
 import { PlacingOrderButton } from './placing_order_button';
@@ -21,6 +21,7 @@ export interface BuyOrderStateButtonProps {
     assetBuyer: AssetBuyer;
     web3Wrapper: Web3Wrapper;
     affiliateInfo?: AffiliateInfo;
+    selectedAsset?: Asset;
     onViewTransaction: () => void;
     onValidationPending: (buyQuote: BuyQuote) => void;
     onValidationFail: (buyQuote: BuyQuote, errorMessage: AssetBuyerError | ZeroExInstantError) => void;
@@ -60,6 +61,7 @@ export const BuyOrderStateButtons: React.StatelessComponent<BuyOrderStateButtonP
             assetBuyer={props.assetBuyer}
             web3Wrapper={props.web3Wrapper}
             affiliateInfo={props.affiliateInfo}
+            selectedAsset={props.selectedAsset}
             onValidationPending={props.onValidationPending}
             onValidationFail={props.onValidationFail}
             onSignatureDenied={props.onSignatureDenied}

packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts

@@ -9,7 +9,7 @@ import { Dispatch } from 'redux';
 import { BuyOrderStateButtons } from '../components/buy_order_state_buttons';
 import { Action, actions } from '../redux/actions';
 import { State } from '../redux/reducer';
-import { AccountState, AffiliateInfo, OrderProcessState, ZeroExInstantError } from '../types';
+import { AccountState, AffiliateInfo, Asset, OrderProcessState, ZeroExInstantError } from '../types';
 import { analytics } from '../util/analytics';
 import { errorFlasher } from '../util/error_flasher';
 import { etherscanUtil } from '../util/etherscan';
@@ -22,6 +22,7 @@ interface ConnectedState {
     assetBuyer: AssetBuyer;
     web3Wrapper: Web3Wrapper;
     affiliateInfo?: AffiliateInfo;
+    selectedAsset?: Asset;
     onViewTransaction: () => void;
 }
 
@@ -41,6 +42,7 @@ const mapStateToProps = (state: State, _ownProps: SelectedAssetBuyOrderStateButt
     const account = state.providerState.account;
     const accountAddress = account.state === AccountState.Ready ? account.address : undefined;
     const accountEthBalanceInWei = account.state === AccountState.Ready ? account.ethBalanceInWei : undefined;
+    const selectedAsset = state.selectedAsset;
     return {
         accountAddress,
         accountEthBalanceInWei,
@@ -49,6 +51,7 @@ const mapStateToProps = (state: State, _ownProps: SelectedAssetBuyOrderStateButt
         web3Wrapper,
         buyQuote: state.latestBuyQuote,
         affiliateInfo: state.affiliateInfo,
+        selectedAsset,
         onViewTransaction: () => {
             if (
                 state.buyOrderState.processState === OrderProcessState.Processing ||