Allow configuration of currency symbol instead of using language-based one

config/template_config.ini

@@ -41,6 +41,9 @@ currency = EUR
 ; Currency exp parameter. You can find that on https://core.telegram.org/bots/payments/currencies.json.
 ; It has a value of 2 in most currencies (EUR, USD, GBP...)
 currency_exp = 2
+; Currency symbol which is show to the client users when displaying prices and transaction values
+; If not defined here, default language specific currency symbol from strings would be used
+currency_symbol = "€"
 
 # Credit card payment settings
 [Credit Card]

utils.py

@@ -47,7 +47,7 @@ class Price:
         return f"<Price of value {self.value}>"
 
     def __str__(self):
-        return strings.currency_format_string.format(symbol=strings.currency_symbol,
+        return strings.currency_format_string.format(symbol=(config["Payments"]["currency_symbol"] or strings.currency_symbol),
                                                      value="{0:.2f}".format(
                                                          self.value / (10 ** int(config["Payments"]["currency_exp"]))))