diff --git a/app/controllers/transactions_controller.rb b/app/controllers/transactions_controller.rb
index 5257ce8..dbe77c7 100644
--- a/app/controllers/transactions_controller.rb
+++ b/app/controllers/transactions_controller.rb
@@ -22,7 +22,13 @@ class TransactionsController < ApplicationController
 
   private
 
-  def transaction_params
-    params.require(:transaction).permit(:creditor_id, :amount, :message)
+  def set_params
+    t = params.require(:transaction)
+          .permit(:debtor, :creditor, :amount, :message)
+
+    t.update {
+      debtor: User.find_by(name: t[:debtor]) || User.zeus,
+      creditor: User.find_by(name: t[:creditor]) || User.zeus
+    }
   end
 end