class TestBlock(unittest.TestCase):
def setUp(self):
t0 = Transaction(0, "hello world")
t1 = Transaction(t0.hash, "woe is me")
t2 = Transaction(t1.hash, "woe is me")
self.b0 = Block(0, 0, t0, t1)
self.b1 = Block(0, self.b0.hash, t2)
def test_serialize(self):
s = json.dumps(self.b1.serialize())
b = Block.deserialize(s)
assert (b.equals(self.b1))
def create_gift_coin(self, blockchain):
"""
This method creates a new coin for the new client
"""
# Get address of the client
hash_public_key = self.hash_pubkey()
coin_gift_tx_input = TransactionInput(prev_tx="1" * 64,
pk_spender="1" * 64,
signature=bytes(
"\x11" * 64,
encoding="utf-8"))
coin_gift_tx_output = TransactionOutput(
value=100, hash_pubkey_recipient=hash_public_key)
coin_gift_tx = Transaction(tx_input=coin_gift_tx_input,
tx_output=coin_gift_tx_output)
transactions = [coin_gift_tx]
nonce = 0
new_block = None
while True:
if len(blockchain.blocks) != 0:
hash_prev_block = blockchain.blocks[len(blockchain.blocks) -
1].get_hash()
new_block = Block(transactions, nonce, hash_prev_block)
else:
new_block = Block(transactions=transactions,
nonce=nonce,
prev_block_hash="0" * 64)
if new_block.get_hash().startswith("0" * blockchain.difficulty):
print("Nonce found:", nonce)
break
nonce += 1
print(coin_gift_tx.serialize())
message = "\x12" + new_block.serialize()
self.socket.sendall(message.encode('utf-8'))
def test_post_block(self):
t0 = Transaction(0, "Foo")
block = Block(0, self.chain.chain[-1].hash, t0)
self.chain.add(block)
response = requests.post('http://localhost:5000/block',
data=block.serialize())
