Merge branch 'development' into feature/not-enough-eth

3 files changed, 41 insertions, 2 deletions

diff --git a/packages/instant/src/util/asset.ts b/packages/instant/src/util/asset.ts
index 4e3b2b946..2c5b6325d 100644
--- a/packages/instant/src/util/asset.ts
+++ b/packages/instant/src/util/asset.ts
@@ -2,7 +2,7 @@ import { AssetProxyId, ObjectMap } from '@0x/types';
 import * as _ from 'lodash';
 
 import { assetDataNetworkMapping } from '../data/asset_data_network_mapping';
-import { Asset, AssetMetaData, Network, ZeroExInstantError } from '../types';
+import { Asset, AssetMetaData, ERC20Asset, Network, ZeroExInstantError } from '../types';
 
 export const assetUtils = {
     createAssetFromAssetData: (
@@ -43,6 +43,16 @@ export const assetUtils = {
                 return defaultName;
         }
     },
+    formattedSymbolForAsset: (asset?: ERC20Asset, defaultName: string = '???'): string => {
+        if (_.isUndefined(asset)) {
+            return defaultName;
+        }
+        const symbol = asset.metaData.symbol;
+        if (symbol.length <= 5) {
+            return symbol;
+        }
+        return `${symbol.slice(0, 3)}…`;
+    },
     getAssociatedAssetDataIfExists: (assetData: string, network: Network): string | undefined => {
         const assetDataGroupIfExists = _.find(assetDataNetworkMapping, value => value[network] === assetData);
         if (_.isUndefined(assetDataGroupIfExists)) {
diff --git a/packages/instant/src/util/big_number_input.ts b/packages/instant/src/util/big_number_input.ts
new file mode 100644
index 000000000..d2a9a8dc5
--- /dev/null
+++ b/packages/instant/src/util/big_number_input.ts
@@ -0,0 +1,29 @@
+import { BigNumber } from '@0x/utils';
+import * as _ from 'lodash';
+
+/**
+ *  A BigNumber extension that is more flexible about decimal strings.
+ *  Such as allowing:
+ *  new BigNumberInput('0.') => 0
+ *  new BigNumberInput('1.') => 1
+ *  new BigNumberInput('1..') => still throws
+ */
+export class BigNumberInput extends BigNumber {
+    private readonly _isEndingWithDecimal: boolean;
+    constructor(bigNumberString: string) {
+        const hasDecimalPeriod = _.endsWith(bigNumberString, '.');
+        let internalString = bigNumberString;
+        if (hasDecimalPeriod) {
+            internalString = bigNumberString.slice(0, -1);
+        }
+        super(internalString);
+        this._isEndingWithDecimal = hasDecimalPeriod;
+    }
+    public toDisplayString(): string {
+        const internalString = super.toString();
+        if (this._isEndingWithDecimal) {
+            return `${internalString}.`;
+        }
+        return internalString;
+    }
+}
diff --git a/packages/instant/src/util/format.ts b/packages/instant/src/util/format.ts
index 2e0ccc03b..4a48dec9d 100644
--- a/packages/instant/src/util/format.ts
+++ b/packages/instant/src/util/format.ts
@@ -24,7 +24,7 @@ export const format = {
         if (_.isUndefined(ethUnitAmount)) {
             return defaultText;
         }
-        const roundedAmount = ethUnitAmount.round(decimalPlaces);
+        const roundedAmount = ethUnitAmount.round(decimalPlaces).toDigits(decimalPlaces);
         return `${roundedAmount} ETH`;
     },
     ethBaseAmountInUsd: (