Spekulaas/Blockchain_School
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mistake ex3

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“Spekulaas” 2023-09-22 15:57:57 +02:00
parent e3e587a74e
commit 3a411c2819
1 changed files with 18 additions and 4 deletions
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18
period_1/04-blockchain_class/405_HW3_Tamper-Proof_Chain/BlockChain.py
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@ -63,6 +63,12 @@ class CBlock:
# Make sure to compute the hash value of the current block and store it properly # Make sure to compute the hash value of the current block and store it properly
def mine(self, leading_zeros): def mine(self, leading_zeros):
self.nonce = 0 self.nonce = 0
if self.previousBlock:
self.previousHash = self.previousBlock.blockHash
else:
self.previousHash = None
while True: while True:
digest = self.computeHash() digest = self.computeHash()
@ -79,8 +85,16 @@ class CBlock:
# The computed digest of the current block # The computed digest of the current block
# The stored digest of the previous block # The stored digest of the previous block
# return the result of all comparisons as a boolean value # return the result of all comparisons as a boolean value
# def is_valid_hash(self):
# if(self.previousBlock == None):
# return True
# if(self.computeHash() != self.blockHash or self.previousBlock.blockHash != self.previousBlock.computeHash()):
# return False
# return self.previousBlock.is_valid_hash()
def is_valid_hash(self): def is_valid_hash(self):
if self.previousBlock == None: if self.previousBlock:
return True self.previousHash = self.previousBlock.computeHash()
return self.computeHash() == self.blockHash return self.computeHash() == self.blockHash