Merge pull request #1232 from 0xProject/feature/instant/account-state-change

[instant] Request account address and balance at mount

11 files changed, 148 insertions, 42 deletions

diff --git a/packages/instant/src/components/buy_button.tsx b/packages/instant/src/components/buy_button.tsx
index 5b07e7416..877ab275c 100644
--- a/packages/instant/src/components/buy_button.tsx
+++ b/packages/instant/src/components/buy_button.tsx
@@ -1,4 +1,5 @@
 import { AssetBuyer, AssetBuyerError, BuyQuote } from '@0x/asset-buyer';
+import { BigNumber } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as _ from 'lodash';
 import * as React from 'react';
@@ -7,16 +8,17 @@ 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 { getBestAddress } from '../util/address';
-import { balanceUtil } from '../util/balance';
 import { gasPriceEstimator } from '../util/gas_price_estimator';
 import { util } from '../util/util';
 
 import { Button } from './ui/button';
 
 export interface BuyButtonProps {
+    accountAddress?: string;
+    accountEthBalanceInWei?: BigNumber;
     buyQuote?: BuyQuote;
     assetBuyer: AssetBuyer;
+    web3Wrapper: Web3Wrapper;
     affiliateInfo?: AffiliateInfo;
     onValidationPending: (buyQuote: BuyQuote) => void;
     onValidationFail: (buyQuote: BuyQuote, errorMessage: AssetBuyerError | ZeroExInstantError) => void;
@@ -33,7 +35,8 @@ export class BuyButton extends React.Component<BuyButtonProps> {
         onBuyFailure: util.boundNoop,
     };
     public render(): React.ReactNode {
-        const shouldDisableButton = _.isUndefined(this.props.buyQuote);
+        const { buyQuote, accountAddress } = this.props;
+        const shouldDisableButton = _.isUndefined(buyQuote) || _.isUndefined(accountAddress);
         return (
             <Button
                 width="100%"
@@ -48,30 +51,25 @@ export class BuyButton extends React.Component<BuyButtonProps> {
     }
     private readonly _handleClick = async () => {
         // The button is disabled when there is no buy quote anyway.
-        const { buyQuote, assetBuyer, affiliateInfo } = this.props;
-        if (_.isUndefined(buyQuote)) {
+        const { buyQuote, assetBuyer, affiliateInfo, accountAddress, accountEthBalanceInWei, web3Wrapper } = this.props;
+        if (_.isUndefined(buyQuote) || _.isUndefined(accountAddress)) {
             return;
         }
-
         this.props.onValidationPending(buyQuote);
-
-        // TODO(bmillman): move address and balance fetching to the async state
-        const web3Wrapper = new Web3Wrapper(assetBuyer.provider);
-        const takerAddress = await getBestAddress(web3Wrapper);
-
-        const hasSufficientEth = await balanceUtil.hasSufficientEth(takerAddress, buyQuote, web3Wrapper);
+        const ethNeededForBuy = buyQuote.worstCaseQuoteInfo.totalEthAmount;
+        // if we don't have a balance for the user, let the transaction through, it will be handled by the wallet
+        const hasSufficientEth = _.isUndefined(accountEthBalanceInWei) || accountEthBalanceInWei.gte(ethNeededForBuy);
         if (!hasSufficientEth) {
             this.props.onValidationFail(buyQuote, ZeroExInstantError.InsufficientETH);
             return;
         }
-
         let txHash: string | undefined;
         const gasInfo = await gasPriceEstimator.getGasInfoAsync();
         const feeRecipient = oc(affiliateInfo).feeRecipient();
         try {
             txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote, {
                 feeRecipient,
-                takerAddress,
+                takerAddress: accountAddress,
                 gasPrice: gasInfo.gasPriceInWei,
             });
         } catch (e) {
@@ -86,7 +84,6 @@ export class BuyButton extends React.Component<BuyButtonProps> {
             }
             throw e;
         }
-
         const startTimeUnix = new Date().getTime();
         const expectedEndTimeUnix = startTimeUnix + gasInfo.estimatedTimeMs;
         this.props.onBuyProcessing(buyQuote, txHash, startTimeUnix, expectedEndTimeUnix);
@@ -99,7 +96,6 @@ export class BuyButton extends React.Component<BuyButtonProps> {
             }
             throw e;
         }
-
         this.props.onBuySuccess(buyQuote, txHash);
     };
 }
diff --git a/packages/instant/src/components/buy_order_state_buttons.tsx b/packages/instant/src/components/buy_order_state_buttons.tsx
index bdac25cf2..6041bf4f5 100644
--- a/packages/instant/src/components/buy_order_state_buttons.tsx
+++ b/packages/instant/src/components/buy_order_state_buttons.tsx
@@ -1,4 +1,6 @@
 import { AssetBuyer, AssetBuyerError, BuyQuote } from '@0x/asset-buyer';
+import { BigNumber } from '@0x/utils';
+import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as React from 'react';
 
 import { ColorOption } from '../style/theme';
@@ -12,9 +14,12 @@ import { Button } from './ui/button';
 import { Flex } from './ui/flex';
 
 export interface BuyOrderStateButtonProps {
+    accountAddress?: string;
+    accountEthBalanceInWei?: BigNumber;
     buyQuote?: BuyQuote;
     buyOrderProcessingState: OrderProcessState;
     assetBuyer: AssetBuyer;
+    web3Wrapper: Web3Wrapper;
     affiliateInfo?: AffiliateInfo;
     onViewTransaction: () => void;
     onValidationPending: (buyQuote: BuyQuote) => void;
@@ -49,8 +54,11 @@ export const BuyOrderStateButtons: React.StatelessComponent<BuyOrderStateButtonP
 
     return (
         <BuyButton
+            accountAddress={props.accountAddress}
+            accountEthBalanceInWei={props.accountEthBalanceInWei}
             buyQuote={props.buyQuote}
             assetBuyer={props.assetBuyer}
+            web3Wrapper={props.web3Wrapper}
             affiliateInfo={props.affiliateInfo}
             onValidationPending={props.onValidationPending}
             onValidationFail={props.onValidationFail}
diff --git a/packages/instant/src/components/zero_ex_instant_provider.tsx b/packages/instant/src/components/zero_ex_instant_provider.tsx
index 58e78c522..cceb44377 100644
--- a/packages/instant/src/components/zero_ex_instant_provider.tsx
+++ b/packages/instant/src/components/zero_ex_instant_provider.tsx
@@ -93,6 +93,8 @@ export class ZeroExInstantProvider extends React.Component<ZeroExInstantProvider
             asyncData.fetchAvailableAssetDatasAndDispatchToStore(this._store);
         }
         // tslint:disable-next-line:no-floating-promises
+        asyncData.fetchAccountInfoAndDispatchToStore(this._store);
+        // tslint:disable-next-line:no-floating-promises
         asyncData.fetchCurrentBuyQuoteAndDispatchToStore(this._store);
         // warm up the gas price estimator cache just in case we can't
         // grab the gas price estimate when submitting the transaction
diff --git a/packages/instant/src/constants.ts b/packages/instant/src/constants.ts
index 34548f26f..b5c4f96e4 100644
--- a/packages/instant/src/constants.ts
+++ b/packages/instant/src/constants.ts
@@ -1,6 +1,6 @@
 import { BigNumber } from '@0x/utils';
 
-import { Network } from './types';
+import { AccountNotReady, AccountState, Network } from './types';
 
 export const BIG_NUMBER_ZERO = new BigNumber(0);
 export const ETH_DECIMALS = 18;
@@ -22,3 +22,15 @@ export const ETHEREUM_NODE_URL_BY_NETWORK = {
     [Network.Kovan]: 'https://kovan.infura.io/',
 };
 export const BLOCK_POLLING_INTERVAL_MS = 10000; // 10s
+export const NO_ACCOUNT: AccountNotReady = {
+    state: AccountState.None,
+};
+export const LOADING_ACCOUNT: AccountNotReady = {
+    state: AccountState.Loading,
+};
+export const LOCKED_ACCOUNT: AccountNotReady = {
+    state: AccountState.Locked,
+};
+export const ERROR_ACCOUNT: AccountNotReady = {
+    state: AccountState.Error,
+};
diff --git a/packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts b/packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts
index c3a5e88b9..610335243 100644
--- a/packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts
+++ b/packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts
@@ -1,4 +1,6 @@
 import { AssetBuyer, AssetBuyerError, BuyQuote } from '@0x/asset-buyer';
+import { BigNumber } from '@0x/utils';
+import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as _ from 'lodash';
 import * as React from 'react';
 import { connect } from 'react-redux';
@@ -7,14 +9,17 @@ import { Dispatch } from 'redux';
 import { BuyOrderStateButtons } from '../components/buy_order_state_buttons';
 import { Action, actions } from '../redux/actions';
 import { State } from '../redux/reducer';
-import { AffiliateInfo, OrderProcessState, ZeroExInstantError } from '../types';
+import { AccountState, AffiliateInfo, OrderProcessState, ZeroExInstantError } from '../types';
 import { errorFlasher } from '../util/error_flasher';
 import { etherscanUtil } from '../util/etherscan';
 
 interface ConnectedState {
+    accountAddress?: string;
+    accountEthBalanceInWei?: BigNumber;
     buyQuote?: BuyQuote;
     buyOrderProcessingState: OrderProcessState;
     assetBuyer: AssetBuyer;
+    web3Wrapper: Web3Wrapper;
     affiliateInfo?: AffiliateInfo;
     onViewTransaction: () => void;
 }
@@ -31,9 +36,16 @@ interface ConnectedDispatch {
 export interface SelectedAssetBuyOrderStateButtons {}
 const mapStateToProps = (state: State, _ownProps: SelectedAssetBuyOrderStateButtons): ConnectedState => {
     const assetBuyer = state.providerState.assetBuyer;
+    const web3Wrapper = state.providerState.web3Wrapper;
+    const account = state.providerState.account;
+    const accountAddress = account.state === AccountState.Ready ? account.address : undefined;
+    const accountEthBalanceInWei = account.state === AccountState.Ready ? account.ethBalanceInWei : undefined;
     return {
+        accountAddress,
+        accountEthBalanceInWei,
         buyOrderProcessingState: state.buyOrderState.processState,
         assetBuyer,
+        web3Wrapper,
         buyQuote: state.latestBuyQuote,
         affiliateInfo: state.affiliateInfo,
         onViewTransaction: () => {
diff --git a/packages/instant/src/redux/actions.ts b/packages/instant/src/redux/actions.ts
index c41c5054b..fc89e3d0e 100644
--- a/packages/instant/src/redux/actions.ts
+++ b/packages/instant/src/redux/actions.ts
@@ -2,7 +2,7 @@ import { BuyQuote } from '@0x/asset-buyer';
 import { BigNumber } from '@0x/utils';
 import * as _ from 'lodash';
 
-import { ActionsUnion, Asset } from '../types';
+import { ActionsUnion, AddressAndEthBalanceInWei, Asset } from '../types';
 
 export interface PlainAction<T extends string> {
     type: T;
@@ -21,6 +21,11 @@ function createAction<T extends string, P>(type: T, data?: P): PlainAction<T> |
 }
 
 export enum ActionTypes {
+    SET_ACCOUNT_STATE_LOADING = 'SET_ACCOUNT_STATE_LOADING',
+    SET_ACCOUNT_STATE_LOCKED = 'SET_ACCOUNT_STATE_LOCKED',
+    SET_ACCOUNT_STATE_ERROR = 'SET_ACCOUNT_STATE_ERROR',
+    SET_ACCOUNT_STATE_READY = 'SET_ACCOUNT_STATE_READY',
+    UPDATE_ACCOUNT_ETH_BALANCE = 'UPDATE_ACCOUNT_ETH_BALANCE',
     UPDATE_ETH_USD_PRICE = 'UPDATE_ETH_USD_PRICE',
     UPDATE_SELECTED_ASSET_AMOUNT = 'UPDATE_SELECTED_ASSET_AMOUNT',
     SET_BUY_ORDER_STATE_NONE = 'SET_BUY_ORDER_STATE_NONE',
@@ -40,6 +45,12 @@ export enum ActionTypes {
 }
 
 export const actions = {
+    setAccountStateLoading: () => createAction(ActionTypes.SET_ACCOUNT_STATE_LOADING),
+    setAccountStateLocked: () => createAction(ActionTypes.SET_ACCOUNT_STATE_LOCKED),
+    setAccountStateError: () => createAction(ActionTypes.SET_ACCOUNT_STATE_ERROR),
+    setAccountStateReady: (address: string) => createAction(ActionTypes.SET_ACCOUNT_STATE_READY, address),
+    updateAccountEthBalance: (addressAndBalance: AddressAndEthBalanceInWei) =>
+        createAction(ActionTypes.UPDATE_ACCOUNT_ETH_BALANCE, addressAndBalance),
     updateEthUsdPrice: (price?: BigNumber) => createAction(ActionTypes.UPDATE_ETH_USD_PRICE, price),
     updateSelectedAssetAmount: (amount?: BigNumber) => createAction(ActionTypes.UPDATE_SELECTED_ASSET_AMOUNT, amount),
     setBuyOrderStateNone: () => createAction(ActionTypes.SET_BUY_ORDER_STATE_NONE),
diff --git a/packages/instant/src/redux/async_data.ts b/packages/instant/src/redux/async_data.ts
index 839a90778..a8f632009 100644
--- a/packages/instant/src/redux/async_data.ts
+++ b/packages/instant/src/redux/async_data.ts
@@ -2,7 +2,7 @@ import { AssetProxyId } from '@0x/types';
 import * as _ from 'lodash';
 
 import { BIG_NUMBER_ZERO } from '../constants';
-import { ERC20Asset } from '../types';
+import { AccountState, ERC20Asset } from '../types';
 import { assetUtils } from '../util/asset';
 import { buyQuoteUpdater } from '../util/buy_quote_updater';
 import { coinbaseApi } from '../util/coinbase_api';
@@ -36,6 +36,44 @@ export const asyncData = {
             store.dispatch(actions.setAvailableAssets([]));
         }
     },
+    fetchAccountInfoAndDispatchToStore: async (store: Store) => {
+        const { providerState } = store.getState();
+        const web3Wrapper = providerState.web3Wrapper;
+        if (providerState.account.state !== AccountState.Loading) {
+            store.dispatch(actions.setAccountStateLoading());
+        }
+        let availableAddresses: string[];
+        try {
+            availableAddresses = await web3Wrapper.getAvailableAddressesAsync();
+        } catch (e) {
+            store.dispatch(actions.setAccountStateError());
+            return;
+        }
+        if (!_.isEmpty(availableAddresses)) {
+            const activeAddress = availableAddresses[0];
+            store.dispatch(actions.setAccountStateReady(activeAddress));
+            // tslint:disable-next-line:no-floating-promises
+            asyncData.fetchAccountBalanceAndDispatchToStore(store);
+        } else {
+            store.dispatch(actions.setAccountStateLocked());
+        }
+    },
+    fetchAccountBalanceAndDispatchToStore: async (store: Store) => {
+        const { providerState } = store.getState();
+        const web3Wrapper = providerState.web3Wrapper;
+        const account = providerState.account;
+        if (account.state !== AccountState.Ready) {
+            return;
+        }
+        try {
+            const address = account.address;
+            const ethBalanceInWei = await web3Wrapper.getBalanceInWeiAsync(address);
+            store.dispatch(actions.updateAccountEthBalance({ address, ethBalanceInWei }));
+        } catch (e) {
+            // leave balance as is
+            return;
+        }
+    },
     fetchCurrentBuyQuoteAndDispatchToStore: async (store: Store) => {
         const { providerState, selectedAsset, selectedAssetAmount, affiliateInfo } = store.getState();
         const assetBuyer = providerState.assetBuyer;
diff --git a/packages/instant/src/redux/reducer.ts b/packages/instant/src/redux/reducer.ts
index 4a939839a..a5a1b6f7d 100644
--- a/packages/instant/src/redux/reducer.ts
+++ b/packages/instant/src/redux/reducer.ts
@@ -4,8 +4,12 @@ import { BigNumber } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as _ from 'lodash';
 
+import { ERROR_ACCOUNT, LOADING_ACCOUNT, LOCKED_ACCOUNT } from '../constants';
 import { assetMetaDataMap } from '../data/asset_meta_data_map';
 import {
+    Account,
+    AccountReady,
+    AccountState,
     AffiliateInfo,
     Asset,
     AssetMetaData,
@@ -57,6 +61,32 @@ export const DEFAULT_STATE: DefaultState = {
 export const createReducer = (initialState: State) => {
     const reducer = (state: State = initialState, action: Action): State => {
         switch (action.type) {
+            case ActionTypes.SET_ACCOUNT_STATE_LOADING:
+                return reduceStateWithAccount(state, LOADING_ACCOUNT);
+            case ActionTypes.SET_ACCOUNT_STATE_LOCKED:
+                return reduceStateWithAccount(state, LOCKED_ACCOUNT);
+            case ActionTypes.SET_ACCOUNT_STATE_ERROR:
+                return reduceStateWithAccount(state, ERROR_ACCOUNT);
+            case ActionTypes.SET_ACCOUNT_STATE_READY: {
+                const account: AccountReady = {
+                    state: AccountState.Ready,
+                    address: action.data,
+                };
+                return reduceStateWithAccount(state, account);
+            }
+            case ActionTypes.UPDATE_ACCOUNT_ETH_BALANCE: {
+                const { address, ethBalanceInWei } = action.data;
+                const currentAccount = state.providerState.account;
+                if (currentAccount.state !== AccountState.Ready || currentAccount.address !== address) {
+                    return state;
+                } else {
+                    const newAccount: AccountReady = {
+                        ...currentAccount,
+                        ethBalanceInWei,
+                    };
+                    return reduceStateWithAccount(state, newAccount);
+                }
+            }
             case ActionTypes.UPDATE_ETH_USD_PRICE:
                 return {
                     ...state,
@@ -80,7 +110,6 @@ export const createReducer = (initialState: State) => {
                 } else {
                     return state;
                 }
-
             case ActionTypes.SET_QUOTE_REQUEST_STATE_PENDING:
                 return {
                     ...state,
@@ -191,6 +220,18 @@ export const createReducer = (initialState: State) => {
     return reducer;
 };
 
+const reduceStateWithAccount = (state: State, account: Account) => {
+    const oldProviderState = state.providerState;
+    const newProviderState: ProviderState = {
+        ...oldProviderState,
+        account,
+    };
+    return {
+        ...state,
+        providerState: newProviderState,
+    };
+};
+
 const doesBuyQuoteMatchState = (buyQuote: BuyQuote, state: State): boolean => {
     const selectedAssetIfExists = state.selectedAsset;
     const selectedAssetAmountIfExists = state.selectedAssetAmount;
diff --git a/packages/instant/src/types.ts b/packages/instant/src/types.ts
index d65f70008..20ad2ed95 100644
--- a/packages/instant/src/types.ts
+++ b/packages/instant/src/types.ts
@@ -120,3 +120,8 @@ export interface AccountNotReady {
 export type Account = AccountReady | AccountNotReady;
 
 export type OrderSource = string | SignedOrder[];
+
+export interface AddressAndEthBalanceInWei {
+    address: string;
+    ethBalanceInWei: BigNumber;
+}
diff --git a/packages/instant/src/util/balance.ts b/packages/instant/src/util/balance.ts
deleted file mode 100644
index f2271495b..000000000
--- a/packages/instant/src/util/balance.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-import { BuyQuote } from '@0x/asset-buyer';
-import { Web3Wrapper } from '@0x/web3-wrapper';
-import * as _ from 'lodash';
-
-export const balanceUtil = {
-    hasSufficientEth: async (takerAddress: string | undefined, buyQuote: BuyQuote, web3Wrapper: Web3Wrapper) => {
-        if (_.isUndefined(takerAddress)) {
-            return false;
-        }
-        const balanceWei = await web3Wrapper.getBalanceInWeiAsync(takerAddress);
-        return balanceWei.gte(buyQuote.worstCaseQuoteInfo.totalEthAmount);
-    },
-};
diff --git a/packages/instant/src/util/provider_state_factory.ts b/packages/instant/src/util/provider_state_factory.ts
index 18b188d89..3281f6bfb 100644
--- a/packages/instant/src/util/provider_state_factory.ts
+++ b/packages/instant/src/util/provider_state_factory.ts
@@ -2,18 +2,12 @@ import { Web3Wrapper } from '@0x/web3-wrapper';
 import { Provider } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { AccountNotReady, AccountState, Maybe, Network, OrderSource, ProviderState } from '../types';
+import { LOADING_ACCOUNT, NO_ACCOUNT } from '../constants';
+import { Maybe, Network, OrderSource, ProviderState } from '../types';
 
 import { assetBuyerFactory } from './asset_buyer_factory';
 import { providerFactory } from './provider_factory';
 
-const LOADING_ACCOUNT: AccountNotReady = {
-    state: AccountState.Loading,
-};
-const NO_ACCOUNT: AccountNotReady = {
-    state: AccountState.None,
-};
-
 export const providerStateFactory = {
     getInitialProviderState: (orderSource: OrderSource, network: Network, provider?: Provider): ProviderState => {
         if (!_.isUndefined(provider)) {