add shop logo in receipt bill pdf

app/pdf/receipt_bill_pdf.rb

@@ -122,8 +122,21 @@ class ReceiptBillPdf < Prawn::Document
     end
 
     def header (shop_details)
+
+        ###Testing for shop logo
+        if shop_details.logo.present?
+          logo_path = shop_details.logo.file.file
+          # Add shop logo to header
+          image logo_path, width: 80, height: 80, position: :center
+          move_down 10
+        end
+        ###
+
+
         text "#{shop_details.name}", :left_margin => -10, :size => self.header_font_size,:align => :center
         move_down line_move
+
+
         text "#{shop_details.address}", :size => self.item_font_size,:align => :center
         # move_down self.item_height
         move_down line_move