def setUp(self):
super().setUp()
self.manager = self.create_peer(network='testnet')
self.hashes_before = set()
for genesis in self.manager.tx_storage.get_all_genesis():
self.hashes_before.add(genesis.hash)
self.blocks_before = add_new_blocks(self.manager,
3,
advance_clock=1)
self.blocks_before.extend(add_blocks_unlock_reward(self.manager))
self.txs_before = add_new_transactions(self.manager, 5)
for block in self.blocks_before:
self.hashes_before.add(block.hash)
for tx in self.txs_before:
self.hashes_before.add(tx.hash)
address = self.get_address(0)
self.root_tx = add_new_tx(self.manager, address=address, value=100)
self.blocks_after = add_blocks_unlock_reward(self.manager)
self.txs_after = add_new_transactions(self.manager, 5)
self.blocks_after.extend(
add_new_blocks(self.manager, 3, advance_clock=1))
self.hashes_after = set()
for block in self.blocks_after:
self.hashes_after.add(block.hash)
for tx in self.txs_after:
self.hashes_after.add(tx.hash)
def test_wallet(self):
tmpdir = tempfile.mkdtemp()
tmpfile = tempfile.NamedTemporaryFile(dir=tmpdir,
suffix='.prom',
delete=False)
filename = os.path.basename(tmpfile.name)
full_path = os.path.join(tmpdir, filename)
prometheus = PrometheusMetricsExporter(metrics=self.manager.metrics,
path=tmpdir,
filename=filename)
prometheus.set_new_metrics()
with open(full_path, 'r') as f:
text = f.read().split('\n')
self.assertEqual(text[5], 'blocks 1.0')
self.assertEqual(text[2], 'transactions 2.0')
add_new_blocks(self.manager, 30, advance_clock=1)
add_new_transactions(self.manager, 5, advance_clock=1)
with open(full_path, 'r') as f:
text = f.read().split('\n')
self.assertEqual(text[5], 'blocks 1.0')
self.assertEqual(text[2], 'transactions 2.0')
self.run_to_completion()
prometheus.set_new_metrics()
with open(full_path, 'r') as f:
text = f.read().split('\n')
self.assertEqual(text[5], 'blocks 31.0')
self.assertEqual(text[2], 'transactions 7.0')
# Removing tmpdir
shutil.rmtree(tmpdir)
def test_dont_revert_block_high_weight_transaction_verify_other(self):
""" A conflict transaction will be propagated and voided. But this transaction
verifies its conflicting transaction. So, its accumulated weight will always be smaller
than the others and it will never be executed.
"""
self.assertEqual(len(self.genesis_blocks), 1)
manager = self.create_peer('testnet', tx_storage=self.tx_storage)
# Mine a few blocks in a row with no transaction but the genesis
blocks = add_new_blocks(manager, 3, advance_clock=15)
add_blocks_unlock_reward(manager)
# Add some transactions between blocks
add_new_transactions(manager, 5, advance_clock=15)
# Create a double spending transaction.
conflicting_tx = add_new_double_spending(manager)
meta = conflicting_tx.get_metadata()
self.assertEqual(len(meta.conflict_with), 1)
self.assertIn(list(meta.conflict_with)[0], conflicting_tx.parents)
# Add a few transactions.
add_new_transactions(manager, 10, advance_clock=15)
meta = conflicting_tx.get_metadata()
self.assertEqual(meta.voided_by, {conflicting_tx.hash})
# These blocks will be voided later.
blocks2 = add_new_blocks(manager, 2, advance_clock=15)
# This block verifies the conflicting transaction and has a high weight.
b0 = manager.generate_mining_block()
b0.parents = [
blocks[-1].hash, conflicting_tx.hash, conflicting_tx.parents[0]
]
# b0.parents = [b0.parents[0], conflicting_tx.hash, conflicting_tx.parents[0]]
b0.weight = 10
b0.resolve()
b0.verify()
manager.propagate_tx(b0, fails_silently=False)
b1 = add_new_block(manager, advance_clock=15)
b2 = add_new_block(manager, advance_clock=15)
# dot = GraphvizVisualizer(manager.tx_storage, include_verifications=True, include_funds=True).dot()
# dot.render('dot2')
self.assertNotEqual(b1.parents[0], b0.hash)
self.assertEqual(b2.parents[0], b1.hash)
meta = conflicting_tx.get_metadata()
self.assertEqual(meta.voided_by, {conflicting_tx.hash})
for block in blocks2:
meta = block.get_metadata()
self.assertIsNone(meta.voided_by)
self.assertConsensusValid(manager)
def test_tips_twin(self):
add_new_blocks(self.manager, 6, advance_clock=1)
add_blocks_unlock_reward(self.manager)
self.assertEqual(
len(self.manager.tx_storage.indexes.mempool_tips.get()), 0)
tx1 = add_new_transactions(self.manager, 1, advance_clock=1)[0]
tx2 = add_new_transactions(self.manager, 1, advance_clock=1)[0]
tx3 = add_new_transactions(self.manager, 1, advance_clock=1)[0]
# 3 txs and the last one is still a tip
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx3.hash]))
# A new tx with custom parents, so tx3 and tx4 will become two tips
tx4 = add_new_transactions(self.manager,
1,
advance_clock=1,
propagate=False)[0]
tx4.parents = [tx1.hash, tx2.hash]
tx4.resolve()
self.manager.propagate_tx(tx4, fails_silently=False)
self.manager.reactor.advance(10)
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx4.hash, tx3.hash]))
# A twin tx with tx4, that will be voided initially, then won't change the tips
tx5 = Transaction.create_from_struct(tx4.get_struct())
tx5.parents = [tx2.hash, tx3.hash]
tx5.resolve()
self.manager.propagate_tx(tx5)
self.manager.reactor.advance(10)
# tx4 and tx5 are twins, so both are voided
self.assertIsNotNone(tx4.get_metadata(force_reload=True).voided_by)
self.assertIsNotNone(tx5.get_metadata(force_reload=True).voided_by)
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx3.hash]))
# add new tx confirming tx5, which will become valid and tx4 becomes voided
tx6 = add_new_transactions(self.manager,
1,
advance_clock=1,
propagate=False)[0]
tx6.parents = [tx5.hash, tx2.hash]
tx6.resolve()
self.manager.propagate_tx(tx6, fails_silently=False)
self.manager.reactor.advance(10)
self.assertIsNotNone(tx4.get_metadata(force_reload=True).voided_by)
self.assertIsNone(tx5.get_metadata(force_reload=True).voided_by)
# tx6 is the only one left
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx6.hash]))
def test_choose_tips(self):
genesis = self.manager.tx_storage.get_all_genesis()
genesis_txs_hashes = [tx.hash for tx in genesis if not tx.is_block]
b = add_new_block(self.manager, advance_clock=1)
# The txs parents are the genesis
self.assertCountEqual(set(b.parents[1:]), set(genesis_txs_hashes))
reward_blocks = add_blocks_unlock_reward(self.manager)
# No tips
self.assertEqual(
len(self.manager.tx_storage.indexes.mempool_tips.get()), 0)
tx1 = add_new_transactions(self.manager, 1, advance_clock=1)[0]
# The tx parents will be the genesis txs still
self.assertCountEqual(set(tx1.parents), set(genesis_txs_hashes))
# The new tx will be a tip
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx1.hash]))
tx2 = add_new_transactions(self.manager, 1, advance_clock=1)[0]
# The tx2 parents will be the tx1 and one of the genesis
self.assertTrue(tx1.hash in tx2.parents)
# The other parent will be one of tx1 parents
self.assertTrue(
set(tx2.parents).issubset(set([tx1.hash] + tx1.parents)))
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx2.hash]))
tx3 = add_new_transactions(self.manager, 1, advance_clock=1)[0]
# tx3 parents will be tx2 and one of tx2 parents
self.assertTrue(tx2.hash in tx3.parents)
self.assertTrue(
set(tx3.parents).issubset(set([tx2.hash] + tx2.parents)))
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx3.hash]))
b2 = add_new_block(self.manager, advance_clock=1)
# With new block there are no tips and block parents
# will be tx3 and one of tx3 parents
self.assertEqual(
len(self.manager.tx_storage.indexes.mempool_tips.get()), 0)
self.assertTrue(tx3.hash in b2.parents)
self.assertTrue(reward_blocks[-1].hash in b2.parents)
self.assertTrue(
set(b2.parents).issubset(
set([tx3.hash] + [reward_blocks[-1].hash] + tx3.parents)))
tx4 = add_new_transactions(self.manager, 1, advance_clock=1)[0]
# tx4 had no tip, so the parents will be the last block parents
self.assertCountEqual(set(tx4.parents), set(b2.parents[1:]))
# Then tx4 will become a tip
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx4.hash]))
def test_dont_revert_block_low_weight(self):
""" A conflict transaction will be propagated and voided.
A new block with low weight will verify it, which won't be enough to flip to executed.
So, it will remain voided.
"""
self.assertEqual(len(self.genesis_blocks), 1)
manager = self.create_peer('testnet', tx_storage=self.tx_storage)
# Mine a few blocks in a row with no transaction but the genesis
blocks = add_new_blocks(manager, 3, advance_clock=15)
add_blocks_unlock_reward(manager)
# Add some transactions between blocks
add_new_transactions(manager, 5, advance_clock=15)
# Create a double spending transaction.
conflicting_tx = add_new_double_spending(manager,
use_same_parents=True)
# Add a few transactions.
add_new_transactions(manager, 10, advance_clock=15)
meta = conflicting_tx.get_metadata()
self.assertEqual(meta.voided_by, {conflicting_tx.hash})
for parent_hash in conflicting_tx.parents:
self.assertNotIn(parent_hash, meta.conflict_with)
# These blocks will be voided later.
add_new_blocks(manager, 2, advance_clock=15)
# This block verifies the conflicting transaction and has a low weight.
# So, it is not enough to revert and this block will be voided as well.
b0 = manager.generate_mining_block()
b0.parents = [
blocks[-1].hash, conflicting_tx.hash, conflicting_tx.parents[0]
]
b0.resolve()
b0.verify()
manager.propagate_tx(b0, fails_silently=False)
b1 = add_new_block(manager, advance_clock=15)
b2 = add_new_block(manager, advance_clock=15)
# dot = GraphvizVisualizer(manager.tx_storage, include_verifications=True, include_funds=True).dot()
# dot.render('dot1')
self.assertNotEqual(b1.parents[0], b0.hash)
self.assertEqual(b2.parents[0], b1.hash)
meta = conflicting_tx.get_metadata()
self.assertEqual(meta.voided_by, {conflicting_tx.hash})
b0_meta = b0.get_metadata()
self.assertEqual(b0_meta.voided_by, {b0.hash, conflicting_tx.hash})
self.assertConsensusValid(manager)
def test_dont_revert_block_high_weight_verify_both(self):
""" A conflicting transaction will be propagated and voided. But the block with high weight
verifies both the conflicting transactions, so this block will always be voided.
"""
self.assertEqual(len(self.genesis_blocks), 1)
manager = self.create_peer('testnet', tx_storage=self.tx_storage)
# Mine a few blocks in a row with no transaction but the genesis
add_new_blocks(manager, 3, advance_clock=15)
add_blocks_unlock_reward(manager)
# Add some transactions between blocks
add_new_transactions(manager, 5, advance_clock=15)
# Create a double spending transaction.
conflicting_tx = add_new_double_spending(manager,
use_same_parents=True)
# Add a few transactions.
add_new_transactions(manager, 10, advance_clock=15)
meta = conflicting_tx.get_metadata()
self.assertEqual(meta.voided_by, {conflicting_tx.hash})
for parent_hash in conflicting_tx.parents:
self.assertNotIn(parent_hash, meta.conflict_with)
# Add two blocks.
blocks2 = add_new_blocks(manager, 2, advance_clock=15)
# This block verifies the conflicting transaction and has a high weight.
b0 = manager.generate_mining_block()
b0.parents = [
b0.parents[0], conflicting_tx.hash, conflicting_tx.parents[0]
]
b0.weight = 10
b0.resolve()
b0.verify()
manager.propagate_tx(b0, fails_silently=False)
b1 = add_new_block(manager, advance_clock=15)
b2 = add_new_block(manager, advance_clock=15)
# dot = GraphvizVisualizer(manager.tx_storage, include_verifications=True, include_funds=True).dot()
# dot.render('dot3')
self.assertNotEqual(b1.parents[0], b0.hash)
self.assertEqual(b2.parents[0], b1.hash)
meta = conflicting_tx.get_metadata()
self.assertEqual(meta.voided_by, {conflicting_tx.hash})
for block in blocks2:
meta = block.get_metadata()
self.assertIsNone(meta.voided_by)
self.assertConsensusValid(manager)
def test_tips_winner(self):
add_new_block(self.manager, advance_clock=1)
add_blocks_unlock_reward(self.manager)
self.assertEqual(
len(self.manager.tx_storage.indexes.mempool_tips.get()), 0)
tx1 = add_new_transactions(self.manager, 1, advance_clock=1)[0]
# tx1 will be the tip
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx1.hash]))
tx2 = add_new_transactions(self.manager, 1, advance_clock=1)[0]
# tx2 will be the tip now
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx2.hash]))
tx3 = Transaction.create_from_struct(tx2.get_struct())
tx3.parents = [tx2.parents[1], tx2.parents[0]]
tx3.resolve()
# Propagate a conflicting twin transaction with tx2
self.manager.propagate_tx(tx3)
meta1 = tx2.get_metadata(force_reload=True)
self.assertEqual(meta1.conflict_with, [tx3.hash])
self.assertEqual(meta1.voided_by, {tx2.hash})
self.assertEqual(meta1.twins, [tx3.hash])
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx1.hash]))
self.manager.reactor.advance(10)
# Creating a new block that confirms tx3, then is will become valid and voiding tx2
new_block = add_new_block(self.manager, propagate=False)
new_block.parents = [new_block.parents[0], tx1.hash, tx3.hash]
new_block.resolve()
new_block.verify()
self.manager.propagate_tx(new_block, fails_silently=False)
self.manager.reactor.advance(10)
self.assertIsNone(
self.manager.tx_storage.get_metadata(tx3.hash).voided_by)
self.assertIsNotNone(
self.manager.tx_storage.get_metadata(tx2.hash).voided_by)
# The block confirms tx3, so it's not a tip
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(), set())
def test_single_chain(self):
""" All new blocks belong to case (i).
"""
self.assertEqual(len(self.genesis_blocks), 1)
manager = self.create_peer('testnet', tx_storage=self.tx_storage)
# The initial score is the sum of the genesis
score = self.genesis_blocks[0].weight
for tx in self.genesis_txs:
score = sum_weights(score, tx.weight)
# Mine 100 blocks in a row with no transaction but the genesis
blocks = add_new_blocks(manager, 100, advance_clock=15)
for i, block in enumerate(blocks):
meta = block.get_metadata(force_reload=True)
score = sum_weights(score, block.weight)
self.assertAlmostEqual(score, meta.score)
# Add some transactions between blocks
txs = add_new_transactions(manager, 30, advance_clock=15)
for tx in txs:
score = sum_weights(score, tx.weight)
# Mine 50 more blocks in a row with no transactions between them
blocks = add_new_blocks(manager, 50)
for i, block in enumerate(blocks):
meta = block.get_metadata()
score = sum_weights(score, block.weight)
self.assertAlmostEqual(score, meta.score)
self.assertAlmostEqual(
manager.consensus_algorithm.block_algorithm.calculate_score(
block), meta.score)
# Mine 15 more blocks with 10 transactions between each block
for _ in range(15):
txs = add_new_transactions(manager, 10, advance_clock=15)
for tx in txs:
score = sum_weights(score, tx.weight)
blocks = add_new_blocks(manager, 1)
for i, block in enumerate(blocks):
meta = block.get_metadata()
score = sum_weights(score, block.weight)
self.assertAlmostEqual(score, meta.score)
self.assertAlmostEqual(
manager.consensus_algorithm.block_algorithm.
calculate_score(block), meta.score)
self.assertConsensusValid(manager)
def test_topological_sort(self):
_set_test_mode(TestMode.TEST_ALL_WEIGHT)
_total = 0
blocks = add_new_blocks(self.manager, 1, advance_clock=1)
_total += len(blocks)
blocks = add_blocks_unlock_reward(self.manager)
_total += len(blocks)
add_new_transactions(self.manager, 1, advance_clock=1)
total = 0
for tx in self.tx_storage._topological_sort():
total += 1
# added blocks + genesis txs + added tx
self.assertEqual(total, _total + 3 + 1)
def test_get(self):
# Success empty mempool
response1 = yield self.web.get("mempool")
data1 = response1.json_value()
self.assertTrue(data1['success'])
self.assertEqual(data1['transactions'], [])
# Success mempool with single TX
txs2 = add_new_transactions(self.manager, 1, advance_clock=1)
response2 = yield self.web.get("mempool")
data2 = response2.json_value()
self.assertTrue(data2['success'])
self.assertEqual(data2['transactions'],
list(map(lambda t: t.hash.hex(), txs2)))
# Success mempool with multiple TX
txs3 = add_new_transactions(self.manager, 2, advance_clock=1)
response3 = yield self.web.get("mempool")
data3 = response3.json_value()
self.assertTrue(data3['success'])
self.assertEqual(data3['transactions'],
list(map(lambda t: t.hash.hex(), txs2 + txs3)))
# add block to confirm previous txs
add_new_blocks(self.manager, 1, advance_clock=1)
# and next call will not have previous mempool
txs4 = add_new_transactions(self.manager, 2, advance_clock=1)
response4 = yield self.web.get("mempool")
data4 = response4.json_value()
self.assertTrue(data4['success'])
self.assertEqual(data4['transactions'],
list(map(lambda t: t.hash.hex(), txs4)))
# add block to confirm previous txs
add_new_blocks(self.manager, 1, advance_clock=1)
# Add more than api limit and check truncated return
add_new_transactions(self.manager,
settings.MEMPOOL_API_TX_LIMIT + 1,
advance_clock=1)
response5 = yield self.web.get("mempool")
data5 = response5.json_value()
self.assertTrue(data5['success'])
# default limit is 100
self.assertEqual(len(data5['transactions']),
settings.MEMPOOL_API_TX_LIMIT)
def test_generate_signature(self):
add_new_blocks(self.manager, 1, advance_clock=1)
add_blocks_unlock_reward(self.manager)
tx = add_new_transactions(self.manager, 1, advance_clock=1)[0]
address = self.wallet.get_unused_address()
keypair = self.wallet.keys[address]
private_key_hex = keypair.private_key_bytes.hex()
private_key = keypair.get_private_key(b'123')
public_key = private_key.public_key()
parser = create_parser()
# Generate signature to validate
args = parser.parse_args([tx.get_struct().hex(), private_key_hex])
f = StringIO()
with redirect_stdout(f):
execute(args, '123')
# Transforming prints str in array
output = f.getvalue().split('\n')
# Last element is always empty string
output.pop()
signature = bytes.fromhex(output[0].split(':')[1].strip())
# Now we validate that the signature is correct
data_to_sign = tx.get_sighash_all()
hashed_data = hashlib.sha256(data_to_sign).digest()
self.assertIsNone(
public_key.verify(signature, hashed_data,
ec.ECDSA(hashes.SHA256())))
def test_get_tips(self):
genesis_txs = [
tx for tx in self.manager.tx_storage.get_all_genesis()
if not tx.is_block
]
# Tips are only the genesis
response1 = yield self.web.get("tips")
data1 = response1.json_value()
self.assertTrue(data1['success'])
self.assertEqual(len(data1['tips']), len(genesis_txs))
self.manager.wallet.unlock(b'MYPASS')
# Add blocks to have funds
add_new_blocks(self.manager, 2, advance_clock=1)
add_blocks_unlock_reward(self.manager)
# Add one tx, now you have only one tip
tx = add_new_transactions(self.manager, 1)[0]
response2 = yield self.web.get("tips")
data2 = response2.json_value()
self.assertTrue(data2['success'])
self.assertEqual(len(data2['tips']), 1)
# Getting tips sending timestamp as parameter
response3 = yield self.web.get("tips",
{b'timestamp': tx.timestamp - 1})
data3 = response3.json_value()
self.assertEqual(len(data3), 2)
def test_accumulated_weight_indirect_block(self):
""" All new blocks belong to case (i).
"""
self.assertEqual(len(self.genesis_blocks), 1)
manager = self.create_peer('testnet', tx_storage=self.tx_storage)
# Mine 3 blocks in a row with no transaction but the genesis
blocks = add_new_blocks(manager, 3, advance_clock=15)
add_blocks_unlock_reward(manager)
# Add some transactions between blocks
tx_list = add_new_transactions(manager, 20, advance_clock=15)
# Mine more 2 blocks in a row with no transactions between them
blocks = add_new_blocks(manager, 2, weight=8)
tx0 = tx_list[0]
for block in blocks:
self.assertNotIn(tx0.hash, block.parents)
# All transactions and blocks should be verifying tx_list[0] directly or
# indirectly.
expected = 0
for tx in tx_list:
expected = sum_weights(expected, tx.weight)
for block in blocks:
expected = sum_weights(expected, block.weight)
meta = tx0.update_accumulated_weight()
self.assertAlmostEqual(meta.accumulated_weight, expected)
def test_get_tips_histogram(self):
# Add blocks to have funds
add_new_blocks(self.manager, 2, 2)
add_blocks_unlock_reward(self.manager)
txs = add_new_transactions(self.manager, 10, 2)
response1 = yield self.web.get("tips-histogram", {
b'begin': txs[0].timestamp,
b'end': txs[0].timestamp
})
data1 = response1.json_value()
self.assertEqual(len(data1), 1)
self.assertEqual([txs[0].timestamp, 1], data1[0])
response2 = yield self.web.get("tips-histogram", {
b'begin': txs[0].timestamp,
b'end': txs[0].timestamp + 1
})
data2 = response2.json_value()
self.assertEqual(len(data2), 2)
self.assertEqual([txs[0].timestamp, 1], data2[0])
self.assertEqual([txs[0].timestamp + 1, 1], data2[1])
response3 = yield self.web.get("tips-histogram", {
b'begin': txs[0].timestamp,
b'end': txs[-1].timestamp
})
data3 = response3.json_value()
self.assertEqual(len(data3), 19)
def setUp(self):
super().setUp()
self.tx_storage = ModifiedTransactionMemoryStorage()
self.network = 'testnet'
self.manager = self.create_peer(self.network,
tx_storage=self.tx_storage)
self.all_hashes = set()
for tx in self.manager.tx_storage.get_all_transactions():
self.all_hashes.add(tx.hash)
# generate blocks and transactions where blk1 is spent by tx1
self.blk1 = add_new_block(self.manager, advance_clock=15)
self.block_list = add_blocks_unlock_reward(self.manager)
self.tx_list = add_new_transactions(self.manager, 5, advance_clock=15)
self.tx1 = self.tx_list[0]
self.assertTrue(self.tx1.inputs[0].tx_id == self.blk1.hash)
self.block_list2 = add_new_blocks(self.manager, 8, advance_clock=15)
# collect all hashes
self.all_hashes.add(self.blk1.hash)
self.all_hashes.update(x.hash for x in self.block_list)
self.all_hashes.update(x.hash for x in self.tx_list)
self.all_hashes.update(x.hash for x in self.block_list2)
def test_tx_methods(self):
blocks = add_new_blocks(self.manager, 2, advance_clock=1)
add_blocks_unlock_reward(self.manager)
txs = add_new_transactions(self.manager, 2, advance_clock=1)
# Validate __str__, __bytes__, __eq__
tx = txs[0]
tx2 = txs[1]
str_tx = str(tx)
self.assertTrue(isinstance(str_tx, str))
self.assertEqual(bytes(tx), tx.get_struct())
tx_equal = Transaction.create_from_struct(tx.get_struct())
self.assertTrue(tx == tx_equal)
self.assertFalse(tx == tx2)
tx2_hash = tx2.hash
tx2.hash = None
self.assertFalse(tx == tx2)
tx2.hash = tx2_hash
# Validate is_genesis without storage
tx_equal.storage = None
self.assertFalse(tx_equal.is_genesis)
# Pow error
tx2.verify_pow()
tx2.weight = 100
with self.assertRaises(PowError):
tx2.verify_pow()
# Get sighashall is different with and without data
self.assertNotEqual(tx.get_sighash_all(), tx.get_sighash_all(clear_input_data=False))
# Verify parent timestamps
tx2.verify_parents()
tx2_timestamp = tx2.timestamp
tx2.timestamp = 2
with self.assertRaises(TimestampError):
tx2.verify_parents()
tx2.timestamp = tx2_timestamp
# Verify inputs timestamps
tx2.verify_inputs()
tx2.timestamp = 2
with self.assertRaises(TimestampError):
tx2.verify_inputs()
tx2.timestamp = tx2_timestamp
# Validate maximum distance between blocks
block = blocks[0]
block2 = blocks[1]
block2.timestamp = block.timestamp + settings.MAX_DISTANCE_BETWEEN_BLOCKS
block2.verify_parents()
block2.timestamp += 1
with self.assertRaises(TimestampError):
block2.verify_parents()
def test_topological_sort_dfs(self):
_set_test_mode(TestMode.TEST_ALL_WEIGHT)
add_new_blocks(self.manager, 11, advance_clock=1)
tx = add_new_transactions(self.manager, 1, advance_clock=1)[0]
total = 0
for tx in self.cache_storage._topological_sort_dfs(root=tx,
visited=dict()):
total += 1
self.assertEqual(total, 5)
def setUp(self):
super().setUp()
self.network = 'testnet'
self.manager = self.create_peer(self.network, unlock_wallet=True)
add_new_blocks(self.manager, 1, advance_clock=1)
add_blocks_unlock_reward(self.manager)
self.tx = add_new_transactions(self.manager, 1, advance_clock=1)[0]
self.parser = create_parser()
def test_tips_back(self):
add_new_block(self.manager, advance_clock=1)
add_blocks_unlock_reward(self.manager)
self.assertEqual(
len(self.manager.tx_storage.indexes.mempool_tips.get()), 0)
tx = add_new_transactions(self.manager, 1, advance_clock=1)[0]
# tx will be the tip
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(), set([tx.hash]))
tx2 = add_new_transactions(self.manager, 1, advance_clock=1)[0]
# tx2 will be the tip now
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx2.hash]))
# with a double spending tx2 must continue being the tip
add_new_double_spending(self.manager)
self.assertCountEqual(
self.manager.tx_storage.indexes.mempool_tips.get(),
set([tx2.hash]))
def test_init_not_voided_tips(self):
# add a bunch of blocks and transactions
for i in range(30):
add_new_block(self.manager, advance_clock=15)
add_new_transactions(self.manager, 5, advance_clock=15)
# add a bunch of conflicting transactions, these will all become voided
for i in range(50):
add_new_double_spending(self.manager)
# finish up with another bunch of blocks and transactions
for i in range(30):
add_new_block(self.manager, advance_clock=15)
add_new_transactions(self.manager, 5, advance_clock=15)
# not the point of this test, but just a sanity check
self.assertConsensusValid(self.manager)
# make sure we have the right number of voided transactions
self.assertEqual(
50,
sum(
bool(tx.get_metadata().voided_by)
for tx in self.tx_storage.get_all_transactions()))
# create a new manager (which will initialize in the self.create_peer call)
self.tx_storage._reset_cache()
self.manager.stop()
manager = self.create_peer(self.network,
tx_storage=self.tx_storage,
full_verification=False)
# make sure none of its tx tips are voided
all_tips = manager.generate_parent_txs(None).get_all_tips()
iter_tips_meta = map(manager.tx_storage.get_metadata, all_tips)
self.assertFalse(any(tx_meta.voided_by for tx_meta in iter_tips_meta))
def test_get_one(self):
genesis_tx = next(x for x in self.manager.tx_storage.get_all_genesis()
if x.is_block)
response_success = yield self.web.get(
"transaction", {b'id': bytes(genesis_tx.hash.hex(), 'utf-8')})
data_success = response_success.json_value()
self.assertTrue(data_success['success'])
dict_test = genesis_tx.to_json(decode_script=True)
dict_test['raw'] = genesis_tx.get_struct().hex()
dict_test['nonce'] = str(dict_test['nonce'])
if genesis_tx.is_block:
dict_test['height'] = genesis_tx.calculate_height()
self.assertEqual(data_success['tx'], dict_test)
# Test sending hash that does not exist
response_error1 = yield self.web.get(
"transaction", {
b'id':
b'000000831cff82fa730cbdf8640fae6c130aab1681336e2f8574e314a5533848'
})
data_error1 = response_error1.json_value()
self.assertFalse(data_error1['success'])
# Test sending invalid hash
response_error2 = yield self.web.get(
"transaction", {
b'id':
b'000000831cff82fa730cbdf8640fae6c130aab1681336e2f8574e314a553384'
})
data_error2 = response_error2.json_value()
self.assertFalse(data_error2['success'])
# Adding blocks to have funds
add_new_blocks(self.manager, 2, advance_clock=1)
add_blocks_unlock_reward(self.manager)
tx = add_new_transactions(self.manager, 1)[0]
tx2 = Transaction.create_from_struct(tx.get_struct())
tx2.parents = [tx.parents[1], tx.parents[0]]
tx2.resolve()
self.manager.propagate_tx(tx2)
# Now we get a tx with conflict, voided_by and twin
response_conflict = yield self.web.get(
"transaction", {b'id': bytes(tx2.hash.hex(), 'utf-8')})
data_conflict = response_conflict.json_value()
self.assertTrue(data_conflict['success'])
def test_get_txs(self):
first_block = add_new_blocks(self.manager, 30, advance_clock=1)[0]
first_tx = add_new_transactions(self.manager, 3, advance_clock=1)[0]
# Using timestamp as float to test code
txs, _ = self.manager.tx_storage.get_older_txs_after(
float(first_tx.timestamp), first_tx.hash, 3)
self.assertEqual(len(txs), 2)
txs, _ = self.manager.tx_storage.get_newer_txs_after(
float(first_tx.timestamp), first_tx.hash, 3)
self.assertEqual(len(txs), 2)
blocks, _ = self.manager.tx_storage.get_older_blocks_after(
float(first_block.timestamp), first_block.hash, 3)
self.assertEqual(len(blocks), 1)
blocks, _ = self.manager.tx_storage.get_newer_blocks_after(
float(first_block.timestamp), first_block.hash, 3)
self.assertEqual(len(blocks), 3)
tx = txs[0]
proto = tx.to_proto()
tx2 = Transaction.create_from_proto(proto)
self.assertEqual(tx, tx2)
block = blocks[0]
proto2 = block.to_proto()
block2 = Block.create_from_proto(proto2)
self.assertEqual(block, block2)
tx3 = tx_or_block_from_proto(proto)
self.assertEqual(tx, tx3)
proto.ClearField('transaction')
with self.assertRaises(ValueError):
tx_or_block_from_proto(proto)
t = datetime.datetime.now() - datetime.timedelta(seconds=1)
t_tx = tx.get_time_from_now()
t2_tx = tx.get_time_from_now(now=t)
self.assertNotEqual(t_tx, t2_tx)
def setUp(self):
super().setUp()
self.resource = self.create_resource()
self.web = StubSite(self.resource)
# Unlocking wallet
self.manager.wallet.unlock(b'MYPASS')
# Creating blocks, txs and a conflict tx to test graphviz with it
add_new_blocks(self.manager, 2, advance_clock=2)
add_blocks_unlock_reward(self.manager)
txs = add_new_transactions(self.manager, 2, advance_clock=2)
tx = txs[0]
self.tx2 = Transaction.create_from_struct(tx.get_struct())
self.tx2.parents = [tx.parents[1], tx.parents[0]]
self.tx2.resolve()
self.manager.propagate_tx(self.tx2)
def test_get_data(self):
genesis_tx = next(x for x in self.manager.tx_storage.get_all_genesis()
if x.is_transaction)
response_success = yield self.web.get(
"transaction_acc_weight",
{b'id': bytes(genesis_tx.hash.hex(), 'utf-8')})
data_success = response_success.json_value()
self.assertTrue(data_success['success'])
self.assertEqual(data_success['accumulated_weight'], genesis_tx.weight)
self.assertEqual(data_success['confirmation_level'], 0)
# Adding blocks to have funds
add_new_blocks(self.manager, 2, advance_clock=1)
add_blocks_unlock_reward(self.manager)
tx = add_new_transactions(self.manager, 5)[0]
add_new_blocks(self.manager, 2, advance_clock=1)
add_blocks_unlock_reward(self.manager)
response_success2 = yield self.web.get(
"transaction_acc_weight", {b'id': bytes(tx.hash.hex(), 'utf-8')})
data_success2 = response_success2.json_value()
self.assertGreater(data_success2['accumulated_weight'], tx.weight)
self.assertEqual(data_success2['confirmation_level'], 1)
# Test sending hash that does not exist
response_error1 = yield self.web.get(
"transaction_acc_weight", {
b'id':
b'000000831cff82fa730cbdf8640fae6c130aab1681336e2f8574e314a5533848'
})
data_error1 = response_error1.json_value()
self.assertFalse(data_error1['success'])
# Test sending invalid hash
response_error2 = yield self.web.get(
"transaction_acc_weight", {
b'id':
b'000000831cff82fa730cbdf8640fae6c130aab1681336e2f8574e314a553384'
})
data_error2 = response_error2.json_value()
self.assertFalse(data_error2['success'])
def test_single_fork_not_best(self):
""" New blocks belong to cases (i), (ii), (iii), and (iv).
The best chain never changes. All other chains are side chains.
"""
self.assertEqual(len(self.genesis_blocks), 1)
manager = self.create_peer('testnet', tx_storage=self.tx_storage)
# The initial score is the sum of the genesis
score = self.genesis_blocks[0].weight
for tx in self.genesis_txs:
score = sum_weights(score, tx.weight)
# Mine 30 blocks in a row with no transactions
blocks = add_new_blocks(manager, 30, advance_clock=15)
for i, block in enumerate(blocks):
meta = block.get_metadata()
score = sum_weights(score, block.weight)
self.assertAlmostEqual(score, meta.score)
# Add some transactions between blocks
txs = add_new_transactions(manager, 5, advance_clock=15)
for tx in txs:
score = sum_weights(score, tx.weight)
# Mine 1 blocks
blocks = add_new_blocks(manager, 1, advance_clock=15)
for i, block in enumerate(blocks):
meta = block.get_metadata()
score = sum_weights(score, block.weight)
self.assertAlmostEqual(score, meta.score)
# Generate a block which will be a fork in the middle of the chain
# Change the order of the transactions to change the hash
fork_block1 = manager.generate_mining_block()
fork_block1.parents = [fork_block1.parents[0]
] + fork_block1.parents[:0:-1]
fork_block1.resolve()
fork_block1.verify()
# Mine 8 blocks in a row
blocks = add_new_blocks(manager, 8, advance_clock=15)
for i, block in enumerate(blocks):
meta = block.get_metadata()
score = sum_weights(score, block.weight)
self.assertAlmostEqual(score, meta.score)
# Fork block must have the same parents as blocks[0] as well as the same score
self.assertEqual(set(blocks[0].parents), set(fork_block1.parents))
# Propagate fork block.
# This block belongs to case (ii).
self.assertTrue(manager.propagate_tx(fork_block1))
fork_meta1 = fork_block1.get_metadata()
self.assertEqual(fork_meta1.voided_by, {fork_block1.hash})
# Add some transactions between blocks
txs = add_new_transactions(manager, 5, advance_clock=15)
for tx in txs:
score = sum_weights(score, tx.weight)
# Mine 5 blocks in a row
# These blocks belong to case (i).
blocks = add_new_blocks(manager, 5, advance_clock=15)
for i, block in enumerate(blocks):
meta = block.get_metadata()
score = sum_weights(score, block.weight)
self.assertAlmostEqual(score, meta.score)
# Add some transactions between blocks
txs = add_new_transactions(manager, 2, advance_clock=15)
for tx in txs:
score = sum_weights(score, tx.weight)
# Propagate a block connected to the voided chain
# These blocks belongs to case (iii).
sidechain1 = add_new_blocks(manager,
3,
parent_block_hash=fork_block1.hash)
for block in sidechain1:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, {block.hash})
# Add some transactions between blocks
txs = add_new_transactions(manager, 2, advance_clock=15)
for tx in txs:
score = sum_weights(score, tx.weight)
# Propagate a block connected to the voided chain
# This block belongs to case (iv).
fork_block3 = manager.generate_mining_block(
parent_block_hash=fork_block1.hash)
fork_block3.resolve()
fork_block3.verify()
self.assertTrue(manager.propagate_tx(fork_block3))
fork_meta3 = fork_block3.get_metadata()
self.assertEqual(fork_meta3.voided_by, {fork_block3.hash})
self.assertConsensusValid(manager)
def test_get_many(self):
# Add some blocks and txs and get them in timestamp order
blocks = add_new_blocks(self.manager, 4, advance_clock=1)
_blocks = add_blocks_unlock_reward(self.manager)
txs = sorted(add_new_transactions(self.manager, 25),
key=lambda x: (x.timestamp, x.hash))
blocks.extend(_blocks)
blocks = sorted(blocks, key=lambda x: (x.timestamp, x.hash))
# Get last 2 blocks
expected1 = blocks[-2:]
expected1.reverse()
response1 = yield self.web.get("transaction", {
b'count': b'2',
b'type': b'block'
})
data1 = response1.json_value()
for expected, result in zip(expected1, data1['transactions']):
self.assertEqual(expected.timestamp, result['timestamp'])
self.assertEqual(expected.hash.hex(), result['tx_id'])
self.assertTrue(data1['has_more'])
# Get last 8 txs
expected2 = txs[-8:]
expected2.reverse()
response2 = yield self.web.get("transaction", {
b'count': b'8',
b'type': b'tx'
})
data2 = response2.json_value()
for expected, result in zip(expected2, data2['transactions']):
self.assertEqual(expected.timestamp, result['timestamp'])
self.assertEqual(expected.hash.hex(), result['tx_id'])
self.assertTrue(data2['has_more'])
# Get older blocks with hash reference
expected3 = blocks[:2]
expected3.reverse()
response3 = yield self.web.get(
"transaction", {
b'count': b'3',
b'type': b'block',
b'timestamp': bytes(str(blocks[2].timestamp), 'utf-8'),
b'hash': bytes(blocks[2].hash.hex(), 'utf-8'),
b'page': b'next'
})
data3 = response3.json_value()
for expected, result in zip(expected3, data3['transactions']):
self.assertEqual(expected.timestamp, result['timestamp'])
self.assertEqual(expected.hash.hex(), result['tx_id'])
self.assertFalse(data3['has_more'])
# Get newer txs with hash reference
response4 = yield self.web.get(
"transaction", {
b'count': b'16',
b'type': b'tx',
b'timestamp': bytes(str(txs[-9].timestamp), 'utf-8'),
b'hash': bytes(txs[-9].hash.hex(), 'utf-8'),
b'page': b'previous'
})
data4 = response4.json_value()
for expected, result in zip(expected2, data4['transactions']):
self.assertEqual(expected.timestamp, result['timestamp'])
self.assertEqual(expected.hash.hex(), result['tx_id'])
self.assertFalse(data4['has_more'])
# Get newer blocks with hash reference
expected5 = blocks[-2:]
expected5.reverse()
response5 = yield self.web.get(
"transaction", {
b'count': b'3',
b'type': b'block',
b'timestamp': bytes(str(expected1[-1].timestamp), 'utf-8'),
b'hash': bytes(expected1[-1].hash.hex(), 'utf-8'),
b'page': b'previous'
})
data5 = response5.json_value()
for expected, result in zip(expected5, data5['transactions']):
self.assertEqual(expected.timestamp, result['timestamp'])
self.assertEqual(expected.hash.hex(), result['tx_id'])
self.assertFalse(data5['has_more'])
# Get txs with hash reference
expected6 = txs[:8]
expected6.reverse()
response6 = yield self.web.get(
"transaction", {
b'count': b'8',
b'type': b'tx',
b'timestamp': bytes(str(txs[8].timestamp), 'utf-8'),
b'hash': bytes(txs[8].hash.hex(), 'utf-8'),
b'page': b'next'
})
data6 = response6.json_value()
for expected, result in zip(expected6, data6['transactions']):
self.assertEqual(expected.timestamp, result['timestamp'])
self.assertEqual(expected.hash.hex(), result['tx_id'])
self.assertTrue(data6['has_more'])
def test_split_brain(self):
debug_pdf = False
manager1 = self.create_peer(self.network, unlock_wallet=True)
manager1.avg_time_between_blocks = 3
manager2 = self.create_peer(self.network, unlock_wallet=True)
manager2.avg_time_between_blocks = 3
for _ in range(10):
add_new_block(manager1, advance_clock=1)
add_blocks_unlock_reward(manager1)
add_new_block(manager2, advance_clock=1)
add_blocks_unlock_reward(manager2)
self.clock.advance(10)
for _ in range(random.randint(3, 10)):
add_new_transactions(manager1, random.randint(2, 4))
add_new_transactions(manager2, random.randint(3, 7))
add_new_double_spending(manager1)
add_new_double_spending(manager2)
self.clock.advance(10)
self.clock.advance(20)
self.assertTipsNotEqual(manager1, manager2)
self.assertConsensusValid(manager1)
self.assertConsensusValid(manager2)
if debug_pdf:
dot1 = GraphvizVisualizer(manager1.tx_storage,
include_verifications=True).dot()
dot1.render('dot1-pre')
conn = FakeConnection(manager1, manager2)
conn.run_one_step() # HELLO
conn.run_one_step() # PEER-ID
empty_counter = 0
for i in range(1000):
if conn.is_empty():
empty_counter += 1
if empty_counter > 10:
break
else:
empty_counter = 0
conn.run_one_step()
self.clock.advance(0.2)
if debug_pdf:
dot1 = GraphvizVisualizer(manager1.tx_storage,
include_verifications=True).dot()
dot1.render('dot1-post')
dot2 = GraphvizVisualizer(manager2.tx_storage,
include_verifications=True).dot()
dot2.render('dot2-post')
node_sync = conn.proto1.state.get_sync_plugin()
self.assertEqual(node_sync.synced_timestamp, node_sync.peer_timestamp)
self.assertTipsEqual(manager1, manager2)
self.assertConsensusEqual(manager1, manager2)
# self.assertConsensusValid(manager1)
self.assertConsensusValid(manager2)
def test_multiple_forks(self):
self.assertEqual(len(self.genesis_blocks), 1)
manager = self.create_peer('testnet', tx_storage=self.tx_storage)
# The initial score is the sum of the genesis
score = self.genesis_blocks[0].weight
for tx in self.genesis_txs:
score = sum_weights(score, tx.weight)
# Mine 30 blocks in a row with no transactions, case (i).
blocks = add_new_blocks(manager, 30, advance_clock=15)
for i, block in enumerate(blocks):
meta = block.get_metadata()
score = sum_weights(score, block.weight)
self.assertAlmostEqual(score, meta.score)
# Add some transactions between blocks
txs1 = add_new_transactions(manager, 5, advance_clock=15)
for tx in txs1:
score = sum_weights(score, tx.weight)
# Mine 1 blocks, case (i).
blocks = add_new_blocks(manager, 1, advance_clock=15)
block_before_fork = blocks[0]
for i, block in enumerate(blocks):
meta = block.get_metadata()
score = sum_weights(score, block.weight)
self.assertAlmostEqual(score, meta.score)
for tx in txs1:
meta = tx.get_metadata(force_reload=True)
self.assertEqual(meta.first_block, blocks[0].hash)
# Add some transactions between blocks
txs2 = add_new_transactions(manager, 3, advance_clock=15)
for tx in txs2:
score = sum_weights(score, tx.weight)
# Mine 5 blocks in a row, case (i).
blocks = add_new_blocks(manager, 5, advance_clock=15)
for i, block in enumerate(blocks):
meta = block.get_metadata()
score = sum_weights(score, block.weight)
self.assertAlmostEqual(score, meta.score)
# Mine 4 blocks, starting a fork.
# All these blocks belong to case (ii).
sidechain = add_new_blocks(manager,
4,
advance_clock=15,
parent_block_hash=blocks[0].parents[0])
# Fork block must have the same parents as blocks[0] as well as the same score
self.assertEqual(set(blocks[0].parents), set(sidechain[0].parents))
for block in blocks:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, None)
for block in sidechain:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, {block.hash})
# Propagate a block connected to the voided chain, case (iii).
fork_block2 = manager.generate_mining_block(
parent_block_hash=sidechain[-1].hash)
fork_block2.resolve()
fork_block2.verify()
self.assertTrue(manager.propagate_tx(fork_block2))
sidechain.append(fork_block2)
# Now, both chains have the same score.
for block in blocks:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, {block.hash})
for block in sidechain:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, {block.hash})
for tx in txs1:
meta = tx.get_metadata(force_reload=True)
self.assertEqual(meta.first_block, block_before_fork.hash)
for tx in txs2:
meta = tx.get_metadata(force_reload=True)
self.assertIsNone(meta.first_block)
# Mine 1 block, starting another fork.
# This block belongs to case (vi).
sidechain2 = add_new_blocks(manager,
1,
advance_clock=15,
parent_block_hash=sidechain[0].hash)
for block in sidechain2:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, {block.hash})
# Mine 2 more blocks in the new fork.
# These blocks belong to case (vii).
sidechain2 += add_new_blocks(manager,
2,
advance_clock=15,
parent_block_hash=sidechain2[-1].hash)
for block in sidechain2:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, {block.hash})
# Mine 1 block, starting another fork from sidechain2.
# This block belongs to case (viii).
sidechain3 = add_new_blocks(manager,
1,
advance_clock=15,
parent_block_hash=sidechain2[-2].hash)
for block in sidechain3:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, {block.hash})
# Propagate a block connected to the side chain, case (v).
fork_block3 = manager.generate_mining_block(
parent_block_hash=fork_block2.hash)
fork_block3.resolve()
fork_block3.verify()
self.assertTrue(manager.propagate_tx(fork_block3))
sidechain.append(fork_block3)
# The side chains have exceeded the score (after it has the same score)
for block in blocks:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, {block.hash})
for block in sidechain:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, None)
# from hathor.graphviz import GraphvizVisualizer
# dot = GraphvizVisualizer(manager.tx_storage, include_verifications=True, include_funds=True).dot()
# dot.render('dot0')
for tx in txs2:
meta = tx.get_metadata(force_reload=True)
self.assertEqual(meta.first_block, sidechain[0].hash)
# Propagate a block connected to the side chain, case (v).
# Another side chain has direcly exceeded the best score.
fork_block4 = manager.generate_mining_block(
parent_block_hash=sidechain3[-1].hash)
fork_block4.weight = 10
fork_block4.resolve()
fork_block4.verify()
self.assertTrue(manager.propagate_tx(fork_block4))
sidechain3.append(fork_block4)
for block in blocks:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, {block.hash})
for block in sidechain[1:]:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, {block.hash})
for block in sidechain2[-1:]:
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, {block.hash})
for block in chain(sidechain[:1], sidechain2[:-1], sidechain3):
meta = block.get_metadata(force_reload=True)
self.assertEqual(meta.voided_by, None)
for tx in txs2:
meta = tx.get_metadata(force_reload=True)
self.assertEqual(meta.first_block, sidechain[0].hash)
# dot = manager.tx_storage.graphviz(format='pdf')
# dot.render('test_fork')
self.assertConsensusValid(manager)
def test_revert_block_high_weight(self):
""" A conflict transaction will be propagated. At first, it will be voided.
But, a new block with high weight will verify it, which will flip it to executed.
"""
self.assertEqual(len(self.genesis_blocks), 1)
manager = self.create_peer('testnet', tx_storage=self.tx_storage)
# Mine a few blocks in a row with no transaction but the genesis
blocks = add_new_blocks(manager, 3, advance_clock=15)
add_blocks_unlock_reward(manager)
# Add some transactions between blocks
add_new_transactions(manager, 5, advance_clock=15)
# Create a double spending transaction.
conflicting_tx = add_new_double_spending(manager, use_same_parents=True)
# Add a few transactions.
add_new_transactions(manager, 10, advance_clock=15)
meta = conflicting_tx.get_metadata()
self.assertEqual(meta.voided_by, {conflicting_tx.hash})
for parent_hash in conflicting_tx.parents:
self.assertNotIn(parent_hash, meta.conflict_with)
# These blocks will be voided later.
blocks2 = add_new_blocks(manager, 2, advance_clock=15)
# This block verifies the conflicting transaction and has a high weight.
# So, it will be executed and previous blocks and transactions will be voided.
tb0 = manager.make_custom_block_template(blocks[-1].hash, [conflicting_tx.hash, conflicting_tx.parents[0]])
b0 = tb0.generate_mining_block(storage=manager.tx_storage)
b0.weight = 10
b0.resolve()
b0.verify()
manager.propagate_tx(b0, fails_silently=False)
b1 = add_new_block(manager, advance_clock=15)
b2 = add_new_block(manager, advance_clock=15)
# from hathor.graphviz import GraphvizVisualizer
# dot = GraphvizVisualizer(manager.tx_storage, include_verifications=True, include_funds=True).dot()
# dot.render('dot0')
self.assertEqual(b1.parents[0], b0.hash)
self.assertEqual(b2.parents[0], b1.hash)
meta = conflicting_tx.get_metadata()
self.assertIsNone(meta.voided_by)
# Find the other transaction voiding the blocks.
tmp_tx = manager.tx_storage.get_transaction(blocks2[0].parents[1])
tmp_tx_meta = tmp_tx.get_metadata()
self.assertEqual(len(tmp_tx_meta.voided_by), 1)
other_tx_hash = list(tmp_tx_meta.voided_by)[0]
for block in blocks2:
meta = block.get_metadata()
self.assertEqual(meta.voided_by, {other_tx_hash, block.hash})
self.assertConsensusValid(manager)