def iter_blockchain(last_hash=None):
bc = BlockChain()
if not last_hash:
last_hash = bc.blocks.get("l")
last_block = bc.blocks.get(last_hash).decode()
print(last_block)
if eval(last_block)["PrevBlockHash"]:
return iter_blockchain(eval(last_block)["PrevBlockHash"])
# ### the way to itertor.
# for i in range(bc.get_height()):
# print(bc.iterator())
print(next(bc.iterator()))
print(next(bc.iterator()))
print(next(bc.iterator()))
# ### the way to itertor.
# for i in range(bc.get_height()):
# print(bc.iterator())
print(next(bc.iterator()))
print(next(bc.iterator()))
print(next(bc.iterator()))
if __name__ == '__main__':
# test_create_bc()
# s = iter_blockchain()
bc = BlockChain()
while True:
try:
last_block = next(bc.iterator())
except StopIteration:
genesis_hash = bc.blocks.get(bc.current_hash).decode()
last_block = eval(genesis_hash)
coinbase_tx = last_block["Transactions"]
for tx in coinbase_tx:
tx_str = tx.decode()
print(json.loads(tx_str))
break
# for tx in last_block["Transactions"]:
# print(tx)