bug fix blocks and added hash

goodchain/src/helpers/TaskHelper.py

@@ -63,6 +63,9 @@ def createBlock(self):
     x = 0
     fees = {}
     for transaction in transactions:
+        if transaction.type == 1:
+            fees[x] = 0
+        else:
             fees[x] = transaction.inputs[0][1] - transaction.outputs[0][1]
         x+=1
 
@@ -81,18 +84,48 @@ def createBlock(self):
     if user_input == "":
         return False
     # seperate user input by comma, check if all the values are in available_transactions
-    user_input = user_input.split(",")
+    user_input = set(user_input.split(","))
     for i in user_input:
+        try:
             if int(i) not in available_transactions:
                 print("Wrong input, try again")
                 return False
             selected_transactions.append(int(i))
+        except:
+            utilityHelper.clearScreen()
+            print("Wrong input, try again")
+            return False
 
-    if len(selected_transactions) > 10 and len(selected_transactions) < 5:
+    if len(selected_transactions) > 10:
         print("You can only select up to 10 transactions")
         return False
+    
+    if len(selected_transactions) < 5:
+        print("You need atleast 5 transactions to mine a block")
+        return False
+    
+    only_personal = True
+    # check if the user selected more user id's in the selected list
+    for i in selected_transactions[2:]:
+        if transactions[i].type == 1 and transactions[i].outputs[0][0] != self.user.public_ser:
+            only_personal = False
+
+        elif transactions[i].type == 0 and transactions[i].inputs[0][0] != self.user.public_ser:
+            only_personal = False
+
+    if only_personal:
+        print("You need atleast 1 transaction from another user")
+        return False
+    
     # add last block if its available
-    block = TxBlock(None)
+    try:
+        lastBlock = utilityHelper.loadFileLine("../data/ledger.dat")
+    except:
+        lastBlock = None
+    if lastBlock != None:
+        lastBlock = lastBlock[0]
+    
+    block = TxBlock(lastBlock)
 
     # create block
     for i in selected_transactions:
@@ -103,6 +136,7 @@ def createBlock(self):
     nonce = block.find_nonce()
     elapsed = time.time() - start
 
+    utilityHelper.clearScreen()
     if not block.good_nonce():
         print("ERROR! Bad nonce")
         return False
@@ -122,6 +156,7 @@ def createBlock(self):
     block.time = elapsed
     block.nonce = nonce
     block.date = time.time()
+    block.blockHash = block.computeHash()
     utilityHelper.saveFile("../data/ledger.dat", block)
     # TODO remove transactions from transaction pool
 
@@ -136,6 +171,7 @@ def exploreBlocks(self):
         x += 1
         total_transactions += len(block.data)
         print(f"---------------------------------------{x}-------------------------------------------")
+        print(block)
         print(f"Block created: {time.strftime('%Y-%m-%d', time.localtime(block.date))}")
     print("---------------------------------------END-------------------------------------------")
     print(f"Total blocks: {x}")
@@ -144,6 +180,7 @@ def exploreBlocks(self):
     print("Select a number to view the block, keep empty to return.")
     user_input = input(">>: ")
     if user_input == "":
+        utilityHelper.clearScreen()
         return
 
     try:
@@ -186,9 +223,9 @@ def exploreBlocks(self):
             for transaction in blocks[user_input].data:
                 x += 1
                 print(f"---------------------------------------{x}-------------------------------------------")
-                print(f"Transaction input: {transaction.inputs[0][1]}")
+                print(f"Transaction input: {transaction.type == 1 and 'reward' or transaction.inputs[0][1]}")
                 print(f"Transaction output: {transaction.outputs[0][1]}")
-                print(f"Transaction fees: {transaction.inputs[0][1] - transaction.outputs[0][1]}")
+                print(f"Transaction fees: {transaction.type == 1 and 0 or transaction.inputs[0][1] - transaction.outputs[0][1]}")
                 print(f"Transaction sender: \n{transaction.inputs[0][0]}")
                 print(f"Transaction recipient: \n{transaction.outputs[0][0]}")
             print("-----------------------------------------------------------------------------------")