chore(POCP-1226): support 8-digit IINs in card event

Author: lukasz-k-bieszczad-cko

src/dynamic-checkout/payment-methods/card.ts

@@ -918,7 +918,12 @@ module ProcessOut {
         return
       }
 
-      const isAllowedIin = restrictToIins.indexOf(iin) !== -1
+      // card_iin may carry more digits than the configured entries (IINs can
+      // be 6 or 8 digits), so match on prefix: an allowed entry matches when
+      // the detected IIN starts with it.
+      const isAllowedIin = restrictToIins.some(function (allowedIin) {
+        return allowedIin.length > 0 && iin.substring(0, allowedIin.length) === allowedIin
+      })
 
       this.setCardRestrictionState(!isAllowedIin)
     }

src/processout/card.ts

@@ -456,8 +456,8 @@ module ProcessOut {
             number = Card.parseNumber(number); // Remove potential spaces
 
             var l = number.length;
-            if (l > 6)
-                l = 6;
+            if (l > 8)
+                l = 8;
             return number.substring(0, l);
         }
 

src/processout/processout.ts

@@ -1676,7 +1676,10 @@ module ProcessOut {
         return
       }
 
-      const iin = cardNumber.substring(0, 6)
+      // Support up to 8-digit IINs (some networks issue 8-digit IINs, which
+      // yield more accurate issuer information); fall back to whatever is
+      // available when fewer digits were provided.
+      const iin = cardNumber.substring(0, 8)
       const apiEndpoint = `iins/${iin}`
 
       this.apiRequest(