[FIX] Function changed

sale_discount_total/models/account_invoice.py

@@ -38,8 +38,8 @@ class AccountInvoice(models.Model):
         amount_untaxed_signed = self.amount_untaxed
         if self.currency_id and self.currency_id != self.company_id.currency_id:
             currency_id = self.currency_id.with_context(date=self.date_invoice)
-            amount_total_company_signed = currency_id.compute(self.amount_total, self.company_id.currency_id)
-            amount_untaxed_signed = currency_id.compute(self.amount_untaxed, self.company_id.currency_id)
+            amount_total_company_signed = currency_id._convert(self.amount_total, self.company_id.currency_id)
+            amount_untaxed_signed = currency_id._convert(self.amount_untaxed, self.company_id.currency_id)
         sign = self.type in ['in_refund', 'out_refund'] and -1 or 1
         self.amount_total_company_signed = amount_total_company_signed * sign
         self.amount_total_signed = self.amount_total * sign
@@ -99,4 +99,4 @@ class AccountInvoice(models.Model):
 class AccountInvoiceLine(models.Model):
     _inherit = "account.invoice.line"
 
-    discount = fields.Float(string='Discount (%)', digits=(16, 20), default=0.0)
+    discount = fields.Float(string='Discount (%)', digits=(16, 20), default=0.0)