def test_flow_10():
"""
This MUST fail
Test of block reverse
"""
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 = Blockchain()
rev_block_0 = blockchain._add_block(origin)
coinbase_1 = Tx(
[TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000aa"))],
[TxOut(2 * 10**10 - 10**5, Script())],
)
tx = Tx([TxIn(OutPoint(coinbase_0.txid, 0), Script())],
[TxOut(10**5, 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)
blockchain._add_block(block_1)
with pytest.raises(Exception):
blockchain._reverse_block(rev_block_0)
reset_blockchain()
def test_flow_8():
"""
This MUST NOT fail
Test of block reverse
"""
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 = Blockchain()
rev_origin = blockchain._add_block(origin)
old_utxo_list = blockchain.main_utxo_set.get_utxo_list()
coinbase_1 = Tx(
[TxIn(OutPoint("00" * 32, 0), Script.from_hex("00030000aa"))],
[TxOut(2 * 10**10 - 10**5, Script())],
)
tx = Tx([TxIn(OutPoint(coinbase_0.txid, 0), Script())],
[TxOut(10**5, 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)
rev_block = blockchain._add_block(block_1)
assert not blockchain.main_utxo_set.get_utxo_list() == old_utxo_list
blockchain._reverse_block(rev_block)
assert blockchain.main_utxo_set.get_utxo_list() == old_utxo_list
with pytest.raises(Exception):
blockchain._reverse_block(rev_block)
blockchain._reverse_block(rev_origin)
assert blockchain.main_utxo_set.get_utxo_list() == []
reset_blockchain()