def test_flow_14():
"""
This MUST NOT fail
"""
blockchain = Blockchain()
coinbase_0 = Tx([TxIn(OutPoint("00" * 32, 0), Script())],
[TxOut(10**10, Script())])
origin_header = BlockHeader("00" * 32, generate_merkle_root([coinbase_0]),
0)
origin = Block(origin_header, [coinbase_0])
coinbase_1 = Tx(
[TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000aa"))],
[TxOut(5 * 10**9, Script()),
TxOut(5 * 10**9, Script())],
)
block_1_header = BlockHeader(origin.header.pow,
generate_merkle_root([coinbase_1]), 0)
block_1 = Block(block_1_header, [coinbase_1])
coinbase_2 = Tx(
[TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000bb"))],
[TxOut(10**10, Script())],
)
block_2_header = BlockHeader(block_1.header.pow,
generate_merkle_root([coinbase_2]), 0)
block_2 = Block(block_2_header, [coinbase_2])
# we try adding the origin again, no problem, it is skipped
assert blockchain.add_blocks([origin, block_1, block_2])
# invalid coinbase
coinbase_3 = Tx(
[
TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000aa")),
TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000bb")),
],
[TxOut(10**10, Script())],
)
block_3_header = BlockHeader(block_1.header.pow,
generate_merkle_root([coinbase_3]), 0)
block_3 = Block(block_3_header, [coinbase_3])
assert not blockchain.add_blocks([origin, block_1, block_2, block_3])
reset_blockchain()
def test_flow_16():
"""
This MUST NOT fail
"""
blockchain = Blockchain()
coinbase_0 = Tx([TxIn(OutPoint("00" * 32, 0), Script())],
[TxOut(10**10, Script())])
coinbase_0.outputs[0].locking_script = lock_p2pkh(
pubkey_hash_from_prvkey(1))
origin_transactions = [coinbase_0]
origin_header = BlockHeader("00" * 32,
generate_merkle_root(origin_transactions), 0)
origin = Block(origin_header, origin_transactions)
assert blockchain.add_blocks([origin])
coinbase_1 = Tx(
[TxIn(OutPoint("00" * 32, 0), Script())],
[TxOut(5 * 10**9, Script()),
TxOut(5 * 10**9, Script())],
)
tx = Tx(
[TxIn(OutPoint(coinbase_0.txid, 0), Script())],
[TxOut(10**10 - 100, Script()),
TxOut(50, Script())],
)
tx.inputs[0].unlocking_script = unlock_p2pkh(sighash_all(tx), 1)
block_1_transactions = [coinbase_1, tx]
block_1_header = BlockHeader(origin.header.pow,
generate_merkle_root(block_1_transactions), 0)
block_1 = Block(block_1_header, block_1_transactions)
assert blockchain.add_blocks([block_1])
reset_blockchain()
def test_flow_12():
"""
This MUST NOT fail
"""
blockchain = Blockchain()
coinbase_0 = Tx([TxIn(OutPoint("00" * 32, 0), Script())],
[TxOut(10**10, Script())])
origin_transactions = [coinbase_0]
origin_header = BlockHeader("00" * 32,
generate_merkle_root(origin_transactions), 0)
origin = Block(origin_header, origin_transactions)
blockchain._add_block(origin)
coinbase_1 = Tx(
[TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000aa"))],
[TxOut(5 * 10**9, Script()),
TxOut(5 * 10**9, Script())],
)
tx = Tx(
[TxIn(OutPoint(coinbase_0.txid, 0), Script())],
[TxOut(10**10 - 100, Script()),
TxOut(50, Script())],
)
block_1_transactions = [coinbase_1, tx]
block_1_header = BlockHeader(origin.header.pow,
generate_merkle_root(block_1_transactions), 0)
block_1 = Block(block_1_header, block_1_transactions)
coinbase_2 = Tx(
[TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000bb"))],
[TxOut(10**10, Script())],
)
tx_2 = Tx([TxIn(OutPoint(tx.txid, 0), Script())],
[TxOut(10**10 - 200, Script())])
tx_3 = Tx(
[
TxIn(OutPoint(coinbase_1.txid, 0), Script()),
TxIn(OutPoint(coinbase_1.txid, 1), Script()),
TxIn(OutPoint(tx.txid, 1), Script()),
],
[TxOut(10**10 + 50, Script())],
)
block_2_transactions = [coinbase_2, tx_2, tx_3]
block_2_header = BlockHeader(block_1.header.pow,
generate_merkle_root(block_2_transactions), 0)
block_2 = Block(block_2_header, block_2_transactions)
# we try adding the origin again, no problem, it is skipped
assert blockchain.add_blocks([origin, block_1, block_2])
coinbase_3 = Tx(
[TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000cc"))],
[TxOut(10**10, Script())],
)
# tx_4 speds the same inputs as tx_2, but it is in a different chain so it is OK
tx_4 = Tx(
[TxIn(OutPoint(tx.txid, 0), Script.from_hex("00030000dd"))],
[TxOut(10**10 - 200, Script())],
)
block_3_transactions = [coinbase_3, tx_4]
block_3_header = BlockHeader(block_1.header.pow,
generate_merkle_root(block_3_transactions), 0)
block_3 = Block(block_3_header, block_3_transactions)
block_3.header.nonce = calculate_nonce(block_3_header, 100)
coinbase_4 = Tx(
[TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000ee"))],
[TxOut(10**10, Script())],
)
block_4_transactions = [coinbase_4]
# invalid reference, must be block_3 header, not block_2
block_4_header = BlockHeader(block_2.header.pow,
generate_merkle_root(block_4_transactions), 0)
block_4 = Block(block_4_header, block_4_transactions)
assert blockchain.add_blocks([block_3, block_4])
assert blockchain.get_last_blocks()[0][0] == block_3.header.pow
block_4.header = BlockHeader(block_3.header.pow,
generate_merkle_root(block_4_transactions), 0)
assert blockchain.add_blocks([block_3, block_4])
assert blockchain.get_last_blocks()[0][0] == block_4.header.pow
reset_blockchain()