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[pre-commit.ci] auto fixes from pre-commit.com hooks

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pre-commit-ci[bot] 2024-10-03 10:10:05 +00:00
parent 9a6fcd5417
commit 6a7b49d95e
1 changed files with 29 additions and 15 deletions
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26
blockchain/pow_algorithm.py
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@ -9,6 +9,7 @@
import hashlib import hashlib
import time import time
class Block: class Block:
def __init__( def __init__(
self, self,
@ -16,7 +17,7 @@ class Block:
previous_hash: str, previous_hash: str,
transactions: str, transactions: str,
timestamp: float, timestamp: float,
difficulty: int difficulty: int,
) -> None: ) -> None:
""" """
Initializes a Block object with the specified parameters. Initializes a Block object with the specified parameters.
@ -61,13 +62,16 @@ class Block:
Returns: Returns:
- None - None
""" """
target = '0' * self.difficulty # Target hash should start with 'difficulty' zeros target = (
"0" * self.difficulty
) # Target hash should start with 'difficulty' zeros
while self.hash[: self.difficulty] != target: while self.hash[: self.difficulty] != target:
self.nonce += 1 self.nonce += 1
self.hash = self.compute_hash() self.hash = self.compute_hash()
print(f"Block mined with nonce {self.nonce}, hash: {self.hash}") print(f"Block mined with nonce {self.nonce}, hash: {self.hash}")
class Blockchain: class Blockchain:
def __init__(self, difficulty: int) -> None: def __init__(self, difficulty: int) -> None:
""" """
@ -106,8 +110,11 @@ class Blockchain:
""" """
previous_block = self.chain[-1] previous_block = self.chain[-1]
new_block = Block( new_block = Block(
len(self.chain), previous_block.hash, transactions, time.time(), len(self.chain),
self.difficulty previous_block.hash,
transactions,
time.time(),
self.difficulty,
) )
new_block.mine_block() new_block.mine_block()
self.chain.append(new_block) self.chain.append(new_block)
@ -134,8 +141,10 @@ class Blockchain:
return True return True
# Test cases # Test cases
## Test Case 1: Blockchain Initialization and Genesis Block ## Test Case 1: Blockchain Initialization and Genesis Block
# This test verifies if the blockchain is correctly initialized with a Genesis block # This test verifies if the blockchain is correctly initialized with a Genesis block
# and if the block is successfully mined. # and if the block is successfully mined.
@ -162,8 +171,12 @@ def test_blockchain() -> None:
## Test Case 4: Tampering with the blockchain ## Test Case 4: Tampering with the blockchain
# This test simulates tampering with the blockchain and checks that the validation # This test simulates tampering with the blockchain and checks that the validation
# correctly detects the tampering. # correctly detects the tampering.
blockchain.chain[1].transactions = "Transaction 1: Alice pays Bob 50 BTC" # Tampering blockchain.chain[
assert not blockchain.is_chain_valid(), "Blockchain should be invalid due to tampering" 1
].transactions = "Transaction 1: Alice pays Bob 50 BTC" # Tampering
assert (
not blockchain.is_chain_valid()
), "Blockchain should be invalid due to tampering"
## Test Case 5: Correct blockchain validation ## Test Case 5: Correct blockchain validation
# This test checks if the blockchain becomes invalid after tampering and verifies # This test checks if the blockchain becomes invalid after tampering and verifies
@ -171,5 +184,6 @@ def test_blockchain() -> None:
print("All test cases passed.") print("All test cases passed.")
if __name__ == "__main__": if __name__ == "__main__":
test_blockchain() test_blockchain()