feat(instant): fetch account address at startup and drive account state changes

3 files changed, 57 insertions, 1 deletions

diff --git a/packages/instant/src/redux/actions.ts b/packages/instant/src/redux/actions.ts
index c41c5054b..084360629 100644
--- a/packages/instant/src/redux/actions.ts
+++ b/packages/instant/src/redux/actions.ts
@@ -21,6 +21,10 @@ 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_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 +44,10 @@ 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),
     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 c3d190af2..e27ec1dc3 100644
--- a/packages/instant/src/redux/async_data.ts
+++ b/packages/instant/src/redux/async_data.ts
@@ -1,6 +1,7 @@
 import * as _ from 'lodash';
 
 import { BIG_NUMBER_ZERO } from '../constants';
+import { AccountState } from '../types';
 import { assetUtils } from '../util/asset';
 import { coinbaseApi } from '../util/coinbase_api';
 import { errorFlasher } from '../util/error_flasher';
@@ -33,4 +34,24 @@ 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));
+        } else {
+            store.dispatch(actions.setAccountStateLocked());
+        }
+    },
 };
diff --git a/packages/instant/src/redux/reducer.ts b/packages/instant/src/redux/reducer.ts
index 4a939839a..9bbd114a2 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 +61,18 @@ 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_ETH_USD_PRICE:
                 return {
                     ...state,
@@ -80,7 +96,6 @@ export const createReducer = (initialState: State) => {
                 } else {
                     return state;
                 }
-
             case ActionTypes.SET_QUOTE_REQUEST_STATE_PENDING:
                 return {
                     ...state,
@@ -191,6 +206,18 @@ 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;