1 files changed, 103 insertions, 0 deletions
diff --git a/packages/instant/src/redux/async_data.ts b/packages/instant/src/redux/async_data.ts
new file mode 100644
index 000000000..b920ac914
--- /dev/null
+++ b/packages/instant/src/redux/async_data.ts
@@ -0,0 +1,103 @@
+import { AssetProxyId } from '@0x/types';
+import * as _ from 'lodash';
+
+import { BIG_NUMBER_ZERO } from '../constants';
+import { AccountState, ERC20Asset, OrderProcessState } from '../types';
+import { assetUtils } from '../util/asset';
+import { buyQuoteUpdater } from '../util/buy_quote_updater';
+import { coinbaseApi } from '../util/coinbase_api';
+import { errorFlasher } from '../util/error_flasher';
+
+import { actions } from './actions';
+import { Store } from './store';
+
+export const asyncData = {
+    fetchEthPriceAndDispatchToStore: async (store: Store) => {
+        try {
+            const ethUsdPrice = await coinbaseApi.getEthUsdPrice();
+            store.dispatch(actions.updateEthUsdPrice(ethUsdPrice));
+        } catch (e) {
+            const errorMessage = 'Error fetching ETH/USD price';
+            errorFlasher.flashNewErrorMessage(store.dispatch, errorMessage);
+            store.dispatch(actions.updateEthUsdPrice(BIG_NUMBER_ZERO));
+        }
+    },
+    fetchAvailableAssetDatasAndDispatchToStore: async (store: Store) => {
+        const { providerState, assetMetaDataMap, network } = store.getState();
+        const assetBuyer = providerState.assetBuyer;
+        try {
+            const assetDatas = await assetBuyer.getAvailableAssetDatasAsync();
+            const assets = assetUtils.createAssetsFromAssetDatas(assetDatas, assetMetaDataMap, network);
+            store.dispatch(actions.setAvailableAssets(assets));
+        } catch (e) {
+            const errorMessage = 'Could not find any assets';
+            errorFlasher.flashNewErrorMessage(store.dispatch, errorMessage);
+            // On error, just specify that none are available
+            store.dispatch(actions.setAvailableAssets([]));
+        }
+    },
+    fetchAccountInfoAndDispatchToStore: async (options: { store: Store; shouldSetToLoading: boolean }) => {
+        const { store, shouldSetToLoading } = options;
+        const { providerState } = store.getState();
+        const web3Wrapper = providerState.web3Wrapper;
+        const provider = providerState.provider;
+        if (shouldSetToLoading && providerState.account.state !== AccountState.Loading) {
+            store.dispatch(actions.setAccountStateLoading());
+        }
+        let availableAddresses: string[];
+        try {
+            // TODO(bmillman): Add support at the web3Wrapper level for calling `eth_requestAccounts` instead of calling enable here
+            const isPrivacyModeEnabled = !_.isUndefined((provider as any).enable);
+            availableAddresses = isPrivacyModeEnabled
+                ? await (provider as any).enable()
+                : await web3Wrapper.getAvailableAddressesAsync();
+        } catch (e) {
+            store.dispatch(actions.setAccountStateLocked());
+            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 (options: { store: Store; shouldSetPending: boolean }) => {
+        const { store, shouldSetPending } = options;
+        const { buyOrderState, providerState, selectedAsset, selectedAssetAmount, affiliateInfo } = store.getState();
+        const assetBuyer = providerState.assetBuyer;
+        if (
+            !_.isUndefined(selectedAssetAmount) &&
+            !_.isUndefined(selectedAsset) &&
+            buyOrderState.processState === OrderProcessState.None &&
+            selectedAsset.metaData.assetProxyId === AssetProxyId.ERC20
+        ) {
+            await buyQuoteUpdater.updateBuyQuoteAsync(
+                assetBuyer,
+                store.dispatch,
+                selectedAsset as ERC20Asset,
+                selectedAssetAmount,
+                shouldSetPending,
+                affiliateInfo,
+            );
+        }
+    },
+};