# File lib/active_merchant/billing/integrations/directebanking/notification.rb, line 102 def generate_signature_string #format is: transaction|user_id|project_id|sender_holder|sender_account_number|sender_bank_code|sender_bank_name|sender_bank_bic|sender_iban|sender_country_id|recipient_holder|recipient_account_number|recipient_bank_code|recipient_bank_name|recipient_bank_bic|recipient_iban|recipient_country_id|international_transaction|amount|currency_id|reason_1|reason_2|security_criteria|user_variable_0|user_variable_1|user_variable_2|user_variable_3|user_variable_4|user_variable_5|created|notification_password PAYMENT_HOOK_SIGNATURE_FIELDS.map {|key| params[key.to_s]} * "|" + "|#{@options[:credential4]}" end