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

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

blockchain/proof_of_work.py

@@ -5,6 +5,7 @@
 from datetime import datetime, timezone
 import hashlib
 
+
 class Block:
     def __init__(self, index: int, previous_hash: str, data: str, timestamp: str):
         self.index = index
@@ -26,18 +27,23 @@ def get_block(self) -> str:
         """
         Returns a formatted string of the block
         """
-        return f"Block {self.index}:\nHash: {self.calculate_hash()}\nData: {self.data}\n"
+        return (
+            f"Block {self.index}:\nHash: {self.calculate_hash()}\nData: {self.data}\n"
+        )
+
 
 def create_genesis_block() -> Block:
     """
     Creates the first block in the blockchain
     """
     return Block(0, "0", "Genesis Block", datetime.now(timezone.utc).isoformat())
 
+
 def get_latest_block() -> Block:
     """
     Returns the latest block in the blockchain
     """
     pass  # Implement logic to return the latest block
 
+
 # Further implementation here...