def test_valid_serialization_1():
tx_in = TxIn(OutPoint("ff" * 32, 0), Script())
tx_out = TxOut(10, Script())
tx_1 = Tx([tx_in], [tx_out])
header = BlockHeader()
block = Block(header, [tx_1])
header.merkle_root = generate_merkle_root(block.transactions)
header.previous_pow = "00" * 32
assert Block.deserialize(block.serialize()) == block
def test_invalid_merkleroot():
tx_in = TxIn(OutPoint("ff" * 32, 0), Script())
tx_out = TxOut(10, Script())
tx_1 = Tx([tx_in], [tx_out])
header = BlockHeader()
block = Block(header, [tx_1])
header.merkle_root = "00" * 32
header.previous_pow = "00" * 32
assert not block.is_valid()
def test_validation_2():
tx_in = TxIn(OutPoint("00" * 32, 0), Script())
tx_out = TxOut(10**10, Script())
tx_1 = Tx([tx_in], [tx_out])
header = BlockHeader()
block = Block(header, [tx_1])
assert not block.is_valid()
header.merkle_root = generate_merkle_root(block.transactions)
header.previous_pow = "00" * 32
assert header.is_valid()
assert block.is_valid() # has a coinbase tx
def test_double_coinbase():
coinbase_1 = Tx(
[TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000aa"))],
[TxOut(10**10, Script())],
)
coinbase_2 = Tx(
[TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000bb"))],
[TxOut(10**10, Script())],
)
header = BlockHeader()
block = Block(header, [coinbase_1, coinbase_2])
header.merkle_root = generate_merkle_root(block.transactions)
header.previous_pow = "00" * 32
assert not block.is_valid()
def test_validation_3():
tx_in = TxIn(OutPoint("ff" * 32, 256**2 - 1), Script())
tx_out = TxOut(10, Script())
tx_1 = Tx([tx_in], [tx_out])
tx_in_2 = TxIn(OutPoint("ff" * 32, 256**2 - 1), Script())
tx_out_2 = TxOut(10, Script())
tx_2 = Tx([tx_in_2], [tx_out_2])
header = BlockHeader()
block = Block(header, [tx_1, tx_2])
header.merkle_root = generate_merkle_root(block.transactions)
header.previous_pow = "00" * 32
assert header.is_valid()
assert not block.is_valid() # two coinbases
def test_empty_block():
header = BlockHeader()
block = Block(header, [])
header.merkle_root = "00" * 32
header.previous_pow = "00" * 32
assert not block.is_valid()
def test_block_header_invalid_length():
header = BlockHeader()
header.previous_pow = "00" * 32
assert not header.is_valid()