update a block if it exists

goodchain/src/helpers/BlockHelper.py

@@ -369,8 +369,7 @@ def socketBlock(block):
         return False, True
 
     if last_block.id == block.id and last_block.metadata['validated'] == False:
-        # update lastblock
+        return updateBlockValidation(block)
-        return
     
     if block.id == last_block.id + 1:
         return addBlockToChain(block, last_block)
@@ -426,6 +425,24 @@ def addBlockToChain(block, last_block):
 
     return True, False
     
+def updateBlockValidation(block):
+    blocks = utilityHelper.loadFile("../data/ledger.dat")
+    
+    if blocks == []:
+        return False, False
+    
+    try:
+        del blocks[-1]
+    except:
+        return False, False
+    
+    utilityHelper.resetFile("../data/ledger.dat")
+    blocks.append(block)
+
+    for b in blocks:
+        utilityHelper.addFile("../data/ledger.dat", b)
+
+    return True, False