33 lines
1.2 KiB
Python
33 lines
1.2 KiB
Python
"""This is supposed to be the more definitive version of the Blockchain,
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ie. exporting it to a file each time it gets modified.
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"""
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import os
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from blockchain import Blockchain
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def main():
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"""Search in directory if blockchain file exists. If it doesn't, create the
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file and write a new Blockchain to it.
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Each time a block gets added to the blockchain, update the file, and
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validate its contents!
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"""
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if 'written_blockchain' not in os.listdir():
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my_blockchain = Blockchain()
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with open('written_blockchain', 'a') as bc_file:
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for i, block in enumerate(my_blockchain.chain):
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bc_file.write('=====\n')
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bc_file.write(f'Block {i}:\n')
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bc_file.write(f'timestamp: {block.timestamp}\n')
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bc_file.write(f'transactions: {block.transactions}\n')
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bc_file.write(f'current hash: {block.hash}\n')
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bc_file.write(f'previous hash: {block.previous_hash}\n')
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bc_file.write(f'proof of work: {block.proof}\n')
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bc_file.write('=====\n')
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print('No blockchain was found, created new blockchain.')
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if __name__ == '__main__':
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main()
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