Refactor EveryPay / Banklink processing

app/models/bank_transaction.rb

@@ -31,19 +31,13 @@ class BankTransaction < ApplicationRecord
   end
 
   # For successful binding, reference number, invoice id and sum must match with the invoice
-  def autobind_invoice(invoice_no: nil)
+  def autobind_invoice
     return if binded?
     return unless registrar
+    return unless invoice
+    return unless invoice.payable?
 
-    inv = if invoice_no.nil?
-            invoice
-          else
-            Invoice.find_by(number: invoice_no)
-          end
-    return unless inv
-    return unless inv.payable?
-
-    create_activity(registrar, inv)
+    create_activity(registrar, invoice)
   end
 
   def bind_invoice(invoice_no)