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authorBrandon Millman <brandon.millman@gmail.com>2018-10-26 12:03:25 +0800
committerBrandon Millman <brandon.millman@gmail.com>2018-10-27 04:10:15 +0800
commitedfb56de6cd1f9605698f9a499016a28f6ba8754 (patch)
treee7876ce8037df5f5f8544355e76b8946ca8072ef /packages/instant
parentaf91a56a5594d07d7da6caaeff79f5a7fb31ff98 (diff)
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fix(instant): prevent outdated quote requests from overriding the correct quote
Diffstat (limited to 'packages/instant')
-rw-r--r--packages/instant/src/containers/selected_erc20_asset_amount_input.ts4
-rw-r--r--packages/instant/src/redux/reducer.ts42
2 files changed, 37 insertions, 9 deletions
diff --git a/packages/instant/src/containers/selected_erc20_asset_amount_input.ts b/packages/instant/src/containers/selected_erc20_asset_amount_input.ts
index ee76e9d66..828c4fcb5 100644
--- a/packages/instant/src/containers/selected_erc20_asset_amount_input.ts
+++ b/packages/instant/src/containers/selected_erc20_asset_amount_input.ts
@@ -79,8 +79,6 @@ const updateBuyQuoteAsync = async (
dispatch(actions.updateLatestBuyQuote(newBuyQuote));
};
-const debouncedUpdateBuyQuoteAsync = _.debounce(updateBuyQuoteAsync, 200, { trailing: true });
-
const mapDispatchToProps = (
dispatch: Dispatch<Action>,
_ownProps: SelectedERC20AssetAmountInputProps,
@@ -97,7 +95,7 @@ const mapDispatchToProps = (
// even if it's debounced, give them the illusion it's loading
dispatch(actions.setQuoteRequestStatePending());
// tslint:disable-next-line:no-floating-promises
- debouncedUpdateBuyQuoteAsync(assetBuyer, dispatch, asset, value);
+ updateBuyQuoteAsync(assetBuyer, dispatch, asset, value);
}
},
});
diff --git a/packages/instant/src/redux/reducer.ts b/packages/instant/src/redux/reducer.ts
index d7e5bdfb5..4f572532a 100644
--- a/packages/instant/src/redux/reducer.ts
+++ b/packages/instant/src/redux/reducer.ts
@@ -1,6 +1,7 @@
import { AssetBuyer, BuyQuote } from '@0x/asset-buyer';
-import { ObjectMap } from '@0x/types';
+import { AssetProxyId, ObjectMap } from '@0x/types';
import { BigNumber } from '@0x/utils';
+import { Web3Wrapper } from '@0x/web3-wrapper';
import * as _ from 'lodash';
import { assetMetaDataMap } from '../data/asset_meta_data_map';
@@ -57,11 +58,19 @@ export const reducer = (state: State = INITIAL_STATE, action: Action): State =>
selectedAssetAmount: action.data,
};
case ActionTypes.UPDATE_LATEST_BUY_QUOTE:
- return {
- ...state,
- latestBuyQuote: action.data,
- quoteRequestState: AsyncProcessState.SUCCESS,
- };
+ const newBuyQuoteIfExists = action.data;
+ const shouldUpdate =
+ _.isUndefined(newBuyQuoteIfExists) || doesBuyQuoteMatchState(newBuyQuoteIfExists, state);
+ if (shouldUpdate) {
+ return {
+ ...state,
+ latestBuyQuote: newBuyQuoteIfExists,
+ quoteRequestState: AsyncProcessState.SUCCESS,
+ };
+ } else {
+ return state;
+ }
+
case ActionTypes.SET_QUOTE_REQUEST_STATE_PENDING:
return {
...state,
@@ -122,3 +131,24 @@ export const reducer = (state: State = INITIAL_STATE, action: Action): State =>
return state;
}
};
+
+const doesBuyQuoteMatchState = (buyQuote: BuyQuote, state: State): boolean => {
+ const selectedAssetIfExists = state.selectedAsset;
+ const selectedAssetAmountIfExists = state.selectedAssetAmount;
+ // if no selectedAsset or selectedAssetAmount exists on the current state, return false
+ if (_.isUndefined(selectedAssetIfExists) || _.isUndefined(selectedAssetAmountIfExists)) {
+ return false;
+ }
+ // if buyQuote's assetData does not match that of the current selected asset, return false
+ if (selectedAssetIfExists.assetData !== buyQuote.assetData) {
+ return false;
+ }
+ // if buyQuote's assetBuyAmount does not match selectedAssetAmount, return false
+ const selectedAssetMetaData = selectedAssetIfExists.metaData;
+ const selectedAssetAmountBaseUnits =
+ selectedAssetMetaData.assetProxyId === AssetProxyId.ERC20
+ ? Web3Wrapper.toBaseUnitAmount(selectedAssetAmountIfExists, selectedAssetMetaData.decimals)
+ : new BigNumber(1);
+ const doesAssetAmountMatch = selectedAssetAmountBaseUnits.eq(buyQuote.assetBuyAmount);
+ return doesAssetAmountMatch;
+};