Always report unexpected errors. Move error message generation into helper function, and add tests

2 files changed, 25 insertions, 21 deletions

diff --git a/packages/instant/src/util/asset.ts b/packages/instant/src/util/asset.ts
index 40560d3eb..08f3642e3 100644
--- a/packages/instant/src/util/asset.ts
+++ b/packages/instant/src/util/asset.ts
@@ -1,3 +1,4 @@
+import { AssetBuyerError } from '@0x/asset-buyer';
 import { AssetProxyId, ObjectMap } from '@0x/types';
 import * as _ from 'lodash';
 
@@ -106,4 +107,20 @@ export const assetUtils = {
         );
         return _.compact(erc20sOrUndefined);
     },
+    assetBuyerErrorMessage: (asset: ERC20Asset, error: Error): string | undefined => {
+        if (error.message === AssetBuyerError.InsufficientAssetLiquidity) {
+            const assetName = assetUtils.bestNameForAsset(asset, 'of this asset');
+            return `Not enough ${assetName} available`;
+        } else if (error.message === AssetBuyerError.InsufficientZrxLiquidity) {
+            return 'Not enough ZRX available';
+        } else if (
+            error.message === AssetBuyerError.StandardRelayerApiError ||
+            error.message.startsWith(AssetBuyerError.AssetUnavailable)
+        ) {
+            const assetName = assetUtils.bestNameForAsset(asset, 'This asset');
+            return `${assetName} is currently unavailable`;
+        }
+
+        return undefined;
+    },
 };
diff --git a/packages/instant/src/util/buy_quote_updater.ts b/packages/instant/src/util/buy_quote_updater.ts
index 6cb5e41b6..4f97622e1 100644
--- a/packages/instant/src/util/buy_quote_updater.ts
+++ b/packages/instant/src/util/buy_quote_updater.ts
@@ -30,30 +30,17 @@ export const buyQuoteUpdater = {
         try {
             newBuyQuote = await assetBuyer.getBuyQuoteAsync(asset.assetData, baseUnitValue, { feePercentage });
         } catch (error) {
-            if (options.dispatchErrors) {
-                dispatch(actions.setQuoteRequestStateFailure());
-                let errorMessage;
-                if (error.message === AssetBuyerError.InsufficientAssetLiquidity) {
-                    const assetName = assetUtils.bestNameForAsset(asset, 'of this asset');
-                    errorMessage = `Not enough ${assetName} available`;
-                } else if (error.message === AssetBuyerError.InsufficientZrxLiquidity) {
-                    errorMessage = 'Not enough ZRX available';
-                } else if (
-                    error.message === AssetBuyerError.StandardRelayerApiError ||
-                    error.message.startsWith(AssetBuyerError.AssetUnavailable)
-                ) {
-                    const assetName = assetUtils.bestNameForAsset(asset, 'This asset');
-                    errorMessage = `${assetName} is currently unavailable`;
-                }
-                if (!_.isUndefined(errorMessage)) {
-                    errorFlasher.flashNewErrorMessage(dispatch, errorMessage);
-                } else {
-                    throw error;
-                }
-            } else {
+            const errorMessage = assetUtils.assetBuyerErrorMessage(asset, error);
+
+            if (_.isUndefined(errorMessage)) {
+                // This is an unknown error, report it to rollbar
                 errorReporter.report(error);
             }
 
+            if (options.dispatchErrors) {
+                dispatch(actions.setQuoteRequestStateFailure());
+                errorFlasher.flashNewErrorMessage(dispatch, errorMessage || 'Error fetching price, please try again');
+            }
             return;
         }
         // We have a successful new buy quote