diff --git a/src/types/purchaseTypes.ts b/src/types/purchaseTypes.ts
index b09831a8..be26268b 100644
--- a/src/types/purchaseTypes.ts
+++ b/src/types/purchaseTypes.ts
@@ -45,7 +45,7 @@ export interface IPurchaseRequest {
 
 export interface IPurchaseParams {
     Source: PurchaseSource;
-    SourceId?: string; // for Source 1, 7 & 18
+    SourceId?: string; // VoidTrader, Vendor, PrimeVaultTrader
     StoreItem: string;
     StorePage: string;
     SearchTerm: string;
@@ -53,10 +53,10 @@ export interface IPurchaseParams {
     Quantity: number;
     UsePremium: boolean;
     ExpectedPrice: number;
-    SyndicateTag?: string; // for Source 2
-    UseFreeFavor?: boolean; // for Source 2
-    ExtraPurchaseInfoJson?: string; // for Source 7
-    IsWeekly?: boolean; // for Source 7
+    SyndicateTag?: string; // SyndicateFavor
+    UseFreeFavor?: boolean; // SyndicateFavor
+    ExtraPurchaseInfoJson?: string; // Vendor
+    IsWeekly?: boolean; // Vendor
 }
 
 export type IInventoryChanges = {