Improved display format for transfer fee

app/models/token.rb

@@ -1,4 +1,12 @@
 class Token < ActiveRecord::Base
   enum standard: [:dip20, :icrc1, :unknown]
   validates :canister_id, presence: true, uniqueness: true
+
+  def transfer_fee_to_f
+    if self.transfer_fee.present?
+      return self.transfer_fee/(10.0**self.decimals)
+    else
+      return nil
+    end
+  end
 end

app/views/tokens/index.html.haml

@@ -34,7 +34,7 @@
             %td= token.name
             %td= token.total_supply
             %td= token.decimals
-            %td= token.transfer_fee
+            %td= token.transfer_fee_to_f
             - if policy(token).update?
               %td= link_to 'Show', token
               %td= link_to 'Edit', edit_token_path(token)

app/views/tokens/show.html.haml

@@ -31,7 +31,5 @@
   = @token.decimals
 %p
   %b Transfer fee:
-  - begin
-    = @token.transfer_fee/(10.0**@token.decimals)
-  - rescue
+  = @token.transfer_fee_to_f