1 files changed, 9 insertions, 1 deletions
diff --git a/packages/instant/src/util/assert.ts b/packages/instant/src/util/assert.ts
index 584d3d4b1..20f8ddaee 100644
--- a/packages/instant/src/util/assert.ts
+++ b/packages/instant/src/util/assert.ts
@@ -4,7 +4,7 @@ import { assetDataUtils } from '@0x/order-utils';
 import { AssetProxyId, ObjectMap, SignedOrder } from '@0x/types';
 import * as _ from 'lodash';
 
-import { AssetMetaData } from '../types';
+import { AffiliateInfo, AssetMetaData } from '../types';
 
 export const assert = {
     ...sharedAssert,
@@ -41,4 +41,12 @@ export const assert = {
             assert.isUri(`${variableName}.imageUrl`, metaData.imageUrl);
         }
     },
+    isValidaffiliateInfo(variableName: string, affiliateInfo: AffiliateInfo): void {
+        assert.isETHAddressHex(`${variableName}.recipientAddress`, affiliateInfo.feeRecipient);
+        assert.isNumber(`${variableName}.percentage`, affiliateInfo.feePercentage);
+        assert.assert(
+            affiliateInfo.feePercentage >= 0 && affiliateInfo.feePercentage <= 0.05,
+            `Expected ${variableName}.percentage to be between 0 and 0.05, but is ${affiliateInfo.feePercentage}`,
+        );
+    },
 };