Update app.py

app.py

@@ -257,6 +257,26 @@ def display_chain_rec():
     response = {'chain': mychain_rec.chain,
                 'length': len(mychain_rec.chain)}
     return response
+    
+def valid_send():
+    valid,ind,mes = mychain_send.chain_valid(mychain_send.chain)
+    if valid:
+        response = 'The Blockchain is valid.'
+        z=True
+    else:
+        response = f'Blockchain is not valid. {mes} at Index {ind}'
+        z=False
+    return response,z
+def valid_rec():
+    valid,ind,mes = mychain_rec.chain_valid(mychain_rec.chain)
+    if valid:
+        response = 'The Blockchain is valid.'
+        z=True
+    else:
+        response = f'Blockchain is not valid. {mes} at Index {ind}'
+        z=False
+    return response,z
+
 
 
 def mychain_mine_block_send(balance, chain_r=None,chain_n=None):
@@ -373,28 +393,34 @@ def issue_tokens(send,rec,amount):
                 mes = f"Sender has no wallet {e}"
                 pass
             if p==True:
-                try:
-                    balance = lod["chain"][-1]["balance"]
-                except Exception:
-                    balance = 0
-                    p=False
-                print (balance)
-                balance_send =int(balance)-int(amount)
-                if balance_send >=0:
-                    p=True
-                    response,message = get_my_chain_rec(rec)
-                    lod_rec = response
-                    print (lod_rec)
+                
+                mes,val = valid_send()
+                if val == True:
                     try:
-                        balance = lod_rec["chain"][-1]["balance"]
-                        print (balance)
+                        balance = lod["chain"][-1]["balance"]
                     except Exception:
-                        p=False
                         balance = 0
-                    balance_rec =int(balance)+int(amount)
-
-                if balance_send < 0:
-                    mes ="Not enough tokens"
+                        p=False
+                    print (balance)
+                    balance_send =int(balance)-int(amount)
+                    if balance_send >=0:
+                        p=True
+                        response,message = get_my_chain_rec(rec)
+                        lod_rec = response
+                        print (lod_rec)
+                        try:
+                            balance = lod_rec["chain"][-1]["balance"]
+                            print (balance)
+                        except Exception:
+                            p=False
+                            balance = 0
+                        balance_rec =int(balance)+int(amount)
+    
+                    if balance_send < 0:
+                        mes ="Not enough tokens"
+                        p = False
+                if val == False:
+                    mes = mes
                     p = False
         if z==False:
             mes = "Invalid Blockchain"