Need help in blockchain coding.

[dn]

On 12/06/2022 02.51, Ayesha Tassaduq wrote:
> I am a beginner in python I want to transfer generated hash to a local database. I try it with socket programming but I fail. can anyone please help me ow I can do this?

Where is the database?
Where is the socket?
What are the (full) error messages?


> class Block:
>     def __init__( self, previous_block_hash, transaction_list ):
>         self.previous_block_hash = previous_block_hash
>         self.transaction_list = transaction_list
> 
>         self.block_data = f"{' - '.join(transaction_list)} - {previous_block_hash}"
>         self.block_hash = hashlib.sha256(self.block_data.encode()).hexdigest()
> 
> 
> class Blockchain:
>     def __init__( self ):
>         self.chain = [ ]
>         self.generate_genesis_block()
> 
>     def generate_genesis_block( self ):
>         self.chain.append(Block("0", [ 'Genesis Block' ]))
> 
>     def create_block_from_transaction( self, transaction_list ):
>         previous_block_hash = self.last_block.block_hash
>         self.chain.append(Block(previous_block_hash, transaction_list))
> 
>     def display_chain( self ):
>         for i in range(len(self.chain)):
>             print(f"Hash {i + 1}: {self.chain [ i ].block_hash}\n")
> 
>     @property
>     def last_block( self ):
>         return self.chain [ -1 ]
> 
> 
> **t1 = Time_sensitive_df
> t2 = "abcdefghijklmnopqrstuvwxyz"
> t3 = normal_df
> myblockchain = Blockchain()
> myblockchain.create_block_from_transaction(t1)
> myblockchain.create_block_from_transaction(t2)
> myblockchain.create_block_from_transaction(t3)
> myblockchain.display_chain()**

-- 
Regards,
=dn