feat: add asserts for new API additions

2 files changed, 6 insertions, 0 deletions

diff --git a/packages/instant/src/index.umd.ts b/packages/instant/src/index.umd.ts
index 77bdb66e1..b998abe95 100644
--- a/packages/instant/src/index.umd.ts
+++ b/packages/instant/src/index.umd.ts
@@ -20,5 +20,8 @@ export const render = (props: ZeroExInstantProps, selector: string = DEFAULT_ZER
     if (!_.isUndefined(props.networkId)) {
         assert.isNumber('networkId', props.networkId);
     }
+    if (!_.isUndefined(props.availableAssetDatas)) {
+        assert.areValidAssetDatas('availableAssetDatas', props.availableAssetDatas);
+    }
     ReactDOM.render(React.createElement(ZeroExInstant, props), document.querySelector(selector));
 };
diff --git a/packages/instant/src/util/assert.ts b/packages/instant/src/util/assert.ts
index 1267a1d23..7c07215bf 100644
--- a/packages/instant/src/util/assert.ts
+++ b/packages/instant/src/util/assert.ts
@@ -15,6 +15,9 @@ export const assert = {
         }
         sharedAssert.doesConformToSchema(variableName, orderSource, schemas.signedOrdersSchema);
     },
+    areValidAssetDatas(variableName: string, assetDatas: string[]): void {
+        _.forEach(assetDatas, (assetData, index) => assert.isHexString(`${variableName}[${index}]`, assetData));
+    },
     isValidAssetMetaDataMap(variableName: string, metaDataMap: ObjectMap<AssetMetaData>): void {
         _.forEach(metaDataMap, (metaData, assetData) => {
             assert.isHexString(`key ${assetData} of ${variableName}`, assetData);