def test_get_entry_cached_already(self) -> None:
metadata = TxData(position=11, date_added=1, date_updated=1)
flags = TxFlags.HasPosition
def _read(*args,
**kwargs) -> Tuple[bytes, Optional[bytes], TxFlags, TxData]:
nonlocal metadata, flags
return [(b"tx_hash", None, flags, metadata)]
def _read_metadata(*args, **kwargs) -> Tuple[bytes, TxFlags, TxData]:
nonlocal metadata, flags
return [(b"tx_hash", flags, metadata)]
mock_store = MockTransactionStore()
mock_store.read = _read
mock_store.read_metadata = _read_metadata
cache = TransactionCache(mock_store, 0)
# Verify that we do not hit the store for our cached entry.
our_entry = TransactionCacheEntry(metadata, TxFlags.HasPosition)
cache._cache[b"tx_hash"] = our_entry
their_entry = cache.get_entry(b"tx_hash")
assert our_entry.metadata == their_entry.metadata
assert our_entry.flags == their_entry.flags
def test_add_missing_transaction(self):
cache = TransactionCache(self.store)
tx_bytes_1 = bytes.fromhex(tx_hex_1)
tx_hash_1 = bitcoinx.double_sha256(tx_bytes_1)
with SynchronousWriter() as writer:
cache.add_missing_transaction(
tx_hash_1, 100, 94, completion_callback=writer.get_callback())
assert writer.succeeded()
assert cache.is_cached(tx_hash_1)
entry = cache.get_entry(tx_hash_1)
assert TxFlags.HasFee | TxFlags.HasHeight, entry.flags & TxFlags.METADATA_FIELD_MASK
assert entry.bytedata is None
tx_bytes_2 = bytes.fromhex(tx_hex_2)
tx_hash_2 = bitcoinx.double_sha256(tx_bytes_2)
with SynchronousWriter() as writer:
cache.add_missing_transaction(
tx_hash_2, 200, completion_callback=writer.get_callback())
assert writer.succeeded()
assert cache.is_cached(tx_hash_2)
entry = cache.get_entry(tx_hash_2)
assert TxFlags.HasHeight == entry.flags & TxFlags.METADATA_FIELD_MASK
assert entry.bytedata is None
def test_add_transaction_update(self):
cache = TransactionCache(self.store)
tx = Transaction.from_hex(tx_hex_1)
data = [
tx.hash(),
TxData(height=1295924,
position=4,
fee=None,
date_added=1,
date_updated=1), None, TxFlags.Unset, None
]
with SynchronousWriter() as writer:
cache.add([data], completion_callback=writer.get_callback())
assert writer.succeeded()
entry = cache.get_entry(tx.hash())
assert entry is not None
assert TxFlags.Unset == entry.flags & TxFlags.STATE_MASK
with SynchronousWriter() as writer:
cache.add_transaction(tx,
TxFlags.StateCleared,
completion_callback=writer.get_callback())
assert writer.succeeded()
tx_hash = tx.hash()
entry = cache.get_entry(tx_hash)
assert entry is not None
assert cache.have_transaction_data_cached(tx_hash)
assert TxFlags.StateCleared == entry.flags & TxFlags.StateCleared
def test_add_then_update(self):
cache = TransactionCache(self.store)
bytedata_1 = bytes.fromhex(tx_hex_1)
tx_hash_1 = bitcoinx.double_sha256(bytedata_1)
metadata_1 = TxData(position=11)
with SynchronousWriter() as writer:
cache.add(
[(tx_hash_1, metadata_1, bytedata_1, TxFlags.StateDispatched)],
completion_callback=writer.get_callback())
assert writer.succeeded()
assert cache.is_cached(tx_hash_1)
entry = cache.get_entry(tx_hash_1)
assert TxFlags.HasByteData | TxFlags.HasPosition | TxFlags.StateDispatched == entry.flags
assert entry.bytedata is not None
metadata_2 = TxData(fee=10, height=88)
propagate_flags = TxFlags.HasFee | TxFlags.HasHeight
with SynchronousWriter() as writer:
cache.update([(tx_hash_1, metadata_2, None,
propagate_flags | TxFlags.HasPosition)],
completion_callback=writer.get_callback())
assert writer.succeeded()
entry = cache.get_entry(tx_hash_1)
expected_flags = propagate_flags | TxFlags.StateDispatched | TxFlags.HasByteData
assert expected_flags == entry.flags, \
f"{TxFlags.to_repr(expected_flags)} != {TxFlags.to_repr(entry.flags)}"
assert entry.bytedata is not None
def test_get_transaction(self):
bytedata = bytes.fromhex(tx_hex_1)
tx_hash = bitcoinx.double_sha256(bytedata)
metadata = TxData(height=1, fee=2, position=None, date_added=1, date_updated=1)
with SynchronousWriter() as writer:
self.store.create([ (tx_hash, metadata, bytedata, TxFlags.Unset, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
cache = TransactionCache(self.store)
tx = cache.get_transaction(tx_hash)
assert tx is not None
assert tx_hash == tx.hash()
def test_get_unverified_entries_too_high(self):
cache = TransactionCache(self.store)
tx_1 = Transaction.from_hex(tx_hex_1)
tx_hash_1 = tx_1.hash()
data = TxData(height=11, position=22, date_added=1, date_updated=1)
with SynchronousWriter() as writer:
cache.add([ (tx_hash_1, data, tx_1, TxFlags.StateSettled, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
results = cache.get_unverified_entries(100)
assert 0 == len(results)
def test_entry_visible(self):
cache = TransactionCache(self.store)
combos = [
(TxFlags.Unset, None, None, True),
(TxFlags.Unset, None, TxFlags.HasHeight, False),
(TxFlags.HasHeight, None, TxFlags.HasHeight, True),
(TxFlags.HasHeight, TxFlags.HasHeight, None, True),
(TxFlags.HasHeight, TxFlags.HasHeight, TxFlags.HasFee, False),
(TxFlags.HasHeight, TxFlags.HasHeight, TxFlags.HasHeight, True),
(TxFlags.HasFee, TxFlags.HasHeight, TxFlags.HasHeight, False),
]
for i, (flag_bits, flags, mask, result) in enumerate(combos):
actual_result = cache._entry_visible(flag_bits, flags, mask)
assert result == actual_result, str(combos[i])
def test_get_transactions(self):
tx_hashes = []
for tx_hex in (tx_hex_1, tx_hex_2):
tx_bytes = bytes.fromhex(tx_hex)
tx_hash = bitcoinx.double_sha256(tx_bytes)
data = TxData(height=1, fee=2, position=None, date_added=1, date_updated=1)
with SynchronousWriter() as writer:
self.store.create([ (tx_hash, data, tx_bytes, TxFlags.Unset, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
tx_hashes.append(tx_hash)
cache = TransactionCache(self.store)
for (tx_hash, tx) in cache.get_transactions(tx_hashes=tx_hashes):
assert tx is not None
assert tx_hash in tx_hashes
def test_get_entry_cached_on_demand(self) -> None:
metadata = TxData(position=11, date_added=1, date_updated=1)
flags = TxFlags.HasPosition
def _read(*args, **kwargs) -> Tuple[bytes, Optional[bytes], TxFlags, TxData]:
nonlocal metadata, flags
return [ (b"tx_hash", None, flags, metadata) ]
def _read_metadata(*args, **kwargs) -> Tuple[bytes, TxFlags, TxData]:
nonlocal metadata, flags
return [ (b"tx_hash", flags, metadata) ]
mock_store = MockTransactionStore()
mock_store.read = _read
mock_store.read_metadata = _read_metadata
cache = TransactionCache(mock_store, 0)
their_entry = cache.get_entry(b"tx_hash")
assert their_entry.metadata == metadata
assert their_entry.flags == flags
def test_get_metadata(self):
# Full entry caching for non-settled transactions, otherwise only metadata.
bytedata_set_1 = bytes.fromhex(tx_hex_1)
tx_hash_1 = bitcoinx.double_sha256(bytedata_set_1)
metadata_set_1 = TxData(height=None, fee=2, position=None, date_added=1, date_updated=1)
bytedata_set_2 = bytes.fromhex(tx_hex_2)
tx_hash_2 = bitcoinx.double_sha256(bytedata_set_2)
metadata_set_2 = TxData(height=1, fee=2, position=10, date_added=1, date_updated=1)
with SynchronousWriter() as writer:
self.store.create([ (tx_hash_1, metadata_set_1, bytedata_set_1, TxFlags.Unset, None),
(tx_hash_2, metadata_set_2, bytedata_set_2, TxFlags.StateSettled, None), ],
completion_callback=writer.get_callback())
assert writer.succeeded()
cache = TransactionCache(self.store)
metadata_get = cache.get_metadata(tx_hash_1)
assert metadata_set_1.height == metadata_get.height
assert metadata_set_1.fee == metadata_get.fee
assert metadata_set_1.position == metadata_get.position
metadata_get = cache.get_metadata(tx_hash_2)
assert metadata_set_2.height == metadata_get.height
assert metadata_set_2.fee == metadata_get.fee
assert metadata_set_2.position == metadata_get.position
entry = cache._cache[tx_hash_1]
assert cache.have_transaction_data_cached(tx_hash_1)
entry = cache._cache[tx_hash_2]
assert not cache.have_transaction_data_cached(tx_hash_2)
def test_get_transaction_after_metadata(self):
# Getting an entry for a settled transaction should update from metadata-only to full.
bytedata_set = bytes.fromhex(tx_hex_1)
tx_hash = bitcoinx.double_sha256(bytedata_set)
metadata_set = TxData(height=1, fee=2, position=None, date_added=1, date_updated=1)
with SynchronousWriter() as writer:
self.store.create([ (tx_hash, metadata_set, bytedata_set, TxFlags.StateSettled, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
cache = TransactionCache(self.store)
metadata_get = cache.get_metadata(tx_hash)
assert metadata_get is not None
# Initial priming of cache will be only metadata.
cached_entry_1 = cache._cache[tx_hash]
assert not cache.have_transaction_data_cached(tx_hash)
# Entry request will hit the database.
entry = cache.get_entry(tx_hash)
assert cache.have_transaction_data_cached(tx_hash)
cached_entry_2 = cache._cache[tx_hash]
assert entry.metadata == cached_entry_2.metadata
assert entry.flags == cached_entry_2.flags
def test_add_transaction(self):
cache = TransactionCache(self.store)
tx = Transaction.from_hex(tx_hex_1)
tx_hash = tx.hash()
with SynchronousWriter() as writer:
cache.add_transaction(tx_hash, tx, completion_callback=writer.get_callback())
assert writer.succeeded()
assert cache.is_cached(tx_hash)
entry = cache.get_entry(tx_hash)
assert TxFlags.HasByteData == entry.flags & TxFlags.HasByteData
assert cache.have_transaction_data_cached(tx_hash)
def test_uncleared_bytedata_requirements(self) -> None:
cache = TransactionCache(self.store)
tx_1 = Transaction.from_hex(tx_hex_1)
tx_hash_1 = tx_1.hash()
data = TxData(position=11)
for state_flag in TRANSACTION_FLAGS:
with pytest.raises(wallet_database.InvalidDataError):
cache.add([ (tx_hash_1, data, None, state_flag, None) ])
with SynchronousWriter() as writer:
cache.add([ (tx_hash_1, data, tx_1, TxFlags.StateSigned, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
# We are applying a clearing of the bytedata, this should be invalid given uncleared.
for state_flag in TRANSACTION_FLAGS:
with pytest.raises(wallet_database.InvalidDataError):
cache.update([ (tx_hash_1, data, None, state_flag | TxFlags.HasByteData) ])
def test_get_flags(self):
cache = TransactionCache(self.store)
assert cache.get_flags(os.urandom(10).hex()) is None
tx_1 = Transaction.from_hex(tx_hex_1)
tx_hash_1 = tx_1.hash()
data = TxData(position=11)
with SynchronousWriter() as writer:
cache.add([ (tx_hash_1, data, tx_1, TxFlags.StateDispatched, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
assert cache.is_cached(tx_hash_1)
assert TxFlags.StateDispatched | TxFlags.HasByteData | TxFlags.HasPosition == \
cache.get_flags(tx_hash_1)
def test_delete(self):
cache = TransactionCache(self.store)
tx_1 = Transaction.from_hex(tx_hex_1)
tx_hash_1 = tx_1.hash()
data = TxData(position=11)
with SynchronousWriter() as writer:
cache.add([ (tx_hash_1, data, tx_1, TxFlags.StateDispatched, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
assert len(self.store.read_metadata(tx_hashes=[ tx_hash_1 ]))
assert cache.is_cached(tx_hash_1)
with SynchronousWriter() as writer:
cache.delete(tx_hash_1, completion_callback=writer.get_callback())
assert writer.succeeded()
assert not len(self.store.read_metadata(tx_hashes=[ tx_hash_1 ]))
assert not cache.is_cached(tx_hash_1)
def test_update_or_add(self):
cache = TransactionCache(self.store)
# Add.
bytedata_1 = bytes.fromhex(tx_hex_1)
tx_hash_1 = bitcoinx.double_sha256(bytedata_1)
metadata_1 = TxData()
with SynchronousWriter() as writer:
cache.update_or_add(
[(tx_hash_1, metadata_1, bytedata_1, TxFlags.StateSettled)],
completion_callback=writer.get_callback())
assert writer.succeeded()
assert cache.is_cached(tx_hash_1)
entry = cache.get_entry(tx_hash_1)
assert TxFlags.HasByteData | TxFlags.StateSettled == entry.flags
assert entry.bytedata is not None
# Update.
metadata_2 = TxData(position=22)
with SynchronousWriter() as writer:
updated_ids = cache.update_or_add(
[(tx_hash_1, metadata_2, None,
TxFlags.HasPosition | TxFlags.StateDispatched)],
completion_callback=writer.get_callback())
assert writer.succeeded()
entry = cache.get_entry(tx_hash_1)
_tx_hash, store_flags, _metadata = self.store.read_metadata(
tx_hashes=[tx_hash_1])[0]
# State flags if present get set in an update otherwise they remain the same.
expected_flags = TxFlags.HasPosition | TxFlags.HasByteData | TxFlags.StateDispatched
assert expected_flags == store_flags, \
f"{TxFlags.to_repr(expected_flags)} != {TxFlags.to_repr(store_flags)}"
assert expected_flags == entry.flags, \
f"{TxFlags.to_repr(expected_flags)} != {TxFlags.to_repr(entry.flags)}"
assert bytedata_1 == entry.bytedata
assert metadata_2.position == entry.metadata.position
assert updated_ids == set([tx_hash_1])
def test_get_unsynced_hashes(self):
cache = TransactionCache(self.store)
tx_1 = Transaction.from_hex(tx_hex_1)
tx_hash_1 = tx_1.hash()
metadata_1 = TxData(height=11)
with SynchronousWriter() as writer:
cache.add([ (tx_hash_1, metadata_1, None, TxFlags.Unset, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
results = cache.get_unsynced_hashes()
assert 1 == len(results)
metadata_2 = TxData()
with SynchronousWriter() as writer:
cache.update([ (tx_hash_1, metadata_2, tx_1, TxFlags.HasByteData) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
results = cache.get_unsynced_hashes()
assert 0 == len(results)
def test_get_entry(self):
cache = TransactionCache(self.store)
bytedata_1 = bytes.fromhex(tx_hex_1)
tx_hash_1 = bitcoinx.double_sha256(bytedata_1)
data = TxData(position=11)
with SynchronousWriter() as writer:
cache.add([(tx_hash_1, data, bytedata_1, TxFlags.StateSettled)],
completion_callback=writer.get_callback())
assert writer.succeeded()
entry = cache.get_entry(tx_hash_1, TxFlags.StateDispatched)
assert entry is None
entry = cache.get_entry(tx_hash_1, TxFlags.StateSettled)
assert entry is not None
def test_get_entry(self):
cache = TransactionCache(self.store)
tx_1 = Transaction.from_hex(tx_hex_1)
tx_hash_1 = tx_1.hash()
data = TxData(position=11)
with SynchronousWriter() as writer:
cache.add([ (tx_hash_1, data, tx_1, TxFlags.StateSettled, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
entry = cache.get_entry(tx_hash_1, TxFlags.StateDispatched)
assert entry is None
entry = cache.get_entry(tx_hash_1, TxFlags.StateSettled)
assert entry is not None
def test_get_unverified_entries(self) -> None:
cache = TransactionCache(self.store)
tx_bytes_1 = bytes.fromhex(tx_hex_1)
tx_hash_1 = bitcoinx.double_sha256(tx_bytes_1)
data = TxData(height=11, date_added=1, date_updated=1)
with SynchronousWriter() as writer:
cache.add([(tx_hash_1, data, tx_bytes_1, TxFlags.StateSettled)],
completion_callback=writer.get_callback())
assert writer.succeeded()
results = cache.get_unverified_entries(10)
assert 0 == len(results)
results = cache.get_unverified_entries(11)
assert 1 == len(results)
def test_apply_reorg(self) -> None:
common_height = 5
cache = TransactionCache(self.store)
# Add the transaction that should be reset back to settled, with data fields cleared.
tx_y1 = Transaction.from_hex(tx_hex_1)
tx_hash_y1 = tx_y1.hash()
data_y1 = TxData(height=common_height+1, position=33, fee=44, date_added=1, date_updated=1)
with SynchronousWriter() as writer:
cache.add([ (tx_hash_y1, data_y1, tx_y1, TxFlags.StateSettled, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
# Add the transaction that would be reset but is below the common height.
tx_n1 = Transaction.from_hex(tx_hex_2)
tx_hash_n1 = tx_n1.hash()
data_n1 = TxData(height=common_height-1, position=33, fee=44, date_added=1, date_updated=1)
with SynchronousWriter() as writer:
cache.add([ (tx_hash_n1, data_n1, tx_n1, TxFlags.StateSettled, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
# Add the transaction that would be reset but is the common height.
tx_n2 = Transaction.from_hex(tx_hex_3)
tx_hash_n2 = tx_n2.hash()
data_n2 = TxData(height=common_height, position=33, fee=44, date_added=1, date_updated=1)
with SynchronousWriter() as writer:
cache.add([ (tx_hash_n2, data_n2, tx_n2, TxFlags.StateSettled, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
# Add a canary transaction that should remain untouched due to non-cleared state.
tx_n3 = Transaction.from_hex(tx_hex_4)
tx_hash_n3 = tx_n3.hash()
data_n3 = TxData(height=111, position=333, fee=444, date_added=1, date_updated=1)
with SynchronousWriter() as writer:
cache.add([ (tx_hash_n3, data_n3, tx_n3, TxFlags.StateDispatched, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
# Delete as if a reorg happened above the suitable but excluded canary transaction.
with SynchronousWriter() as writer:
cache.apply_reorg(5, completion_callback=writer.get_callback())
assert writer.succeeded()
metadata_entries = cache.get_entries(TxFlags.HasByteData, TxFlags.HasByteData)
assert 4 == len(metadata_entries)
# Affected, canary above common height.
y1 = [ m[1] for m in metadata_entries if m[0] == tx_hash_y1 ][0]
assert 0 == y1.metadata.height
assert None is y1.metadata.position
assert data_y1.fee == y1.metadata.fee
assert TxFlags.StateCleared | TxFlags.HasByteData | TxFlags.HasFee == y1.flags, \
TxFlags.to_repr(y1.flags)
expected_flags = (TxFlags.HasByteData | TxFlags.HasFee |
TxFlags.HasHeight | TxFlags.HasPosition)
# Skipped, old enough to survive.
n1 = [ m[1] for m in metadata_entries if m[0] == tx_hash_n1 ][0]
assert data_n1.height == n1.metadata.height
assert data_n1.position == n1.metadata.position
assert data_n1.fee == n1.metadata.fee
assert TxFlags.StateSettled | expected_flags == n1.flags, TxFlags.to_repr(n1.flags)
# Skipped, canary common height.
n2 = [ m[1] for m in metadata_entries if m[0] == tx_hash_n2 ][0]
assert data_n2.height == n2.metadata.height
assert data_n2.position == n2.metadata.position
assert data_n2.fee == n2.metadata.fee
assert TxFlags.StateSettled | expected_flags == n2.flags, TxFlags.to_repr(n2.flags)
# Skipped, canary non-cleared.
n3 = [ m[1] for m in metadata_entries if m[0] == tx_hash_n3 ][0]
assert data_n3.height == n3.metadata.height
assert data_n3.position == n3.metadata.position
assert data_n3.fee == n3.metadata.fee
assert TxFlags.StateDispatched | expected_flags == n3.flags, TxFlags.to_repr(n3.flags)
def test_get_height(self):
cache = TransactionCache(self.store)
tx_1 = Transaction.from_hex(tx_hex_1)
tx_hash_1 = tx_1.hash()
metadata_1 = TxData(height=11)
with SynchronousWriter() as writer:
cache.add([ (tx_hash_1, metadata_1, tx_1, TxFlags.StateSettled, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
assert 11 == cache.get_height(tx_hash_1)
cache.update_flags(tx_hash_1, TxFlags.StateCleared, TxFlags.HasByteData)
assert 11 == cache.get_height(tx_hash_1)
cache.update_flags(tx_hash_1, TxFlags.StateReceived, TxFlags.HasByteData)
assert None is cache.get_height(tx_hash_1)
def test_get_height(self):
cache = TransactionCache(self.store)
bytedata_1 = bytes.fromhex(tx_hex_1)
tx_hash_1 = bitcoinx.double_sha256(bytedata_1)
metadata_1 = TxData(height=11)
with SynchronousWriter() as writer:
cache.add(
[(tx_hash_1, metadata_1, bytedata_1, TxFlags.StateSettled)],
completion_callback=writer.get_callback())
assert writer.succeeded()
assert 11 == cache.get_height(tx_hash_1)
cache.update_flags(tx_hash_1, TxFlags.StateCleared,
TxFlags.HasByteData)
assert 11 == cache.get_height(tx_hash_1)
cache.update_flags(tx_hash_1, TxFlags.StateReceived,
TxFlags.HasByteData)
assert cache.get_height(tx_hash_1) is None
def test_add_then_update(self):
cache = TransactionCache(self.store)
tx_1 = Transaction.from_hex(tx_hex_1)
tx_hash_1 = tx_1.hash()
metadata_1 = TxData(position=11)
with SynchronousWriter() as writer:
cache.add([ (tx_hash_1, metadata_1, tx_1, TxFlags.StateDispatched, None) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
assert cache.is_cached(tx_hash_1)
entry = cache.get_entry(tx_hash_1)
assert TxFlags.HasByteData | TxFlags.HasPosition | TxFlags.StateDispatched == entry.flags
assert cache.have_transaction_data_cached(tx_hash_1)
# NOTE: We are not updating bytedata, and it should remain the same. The flags we pass
# into update are treated specially to achieve this.
metadata_2 = TxData(fee=10, height=88)
propagate_flags = TxFlags.HasFee | TxFlags.HasHeight
with SynchronousWriter() as writer:
cache.update([ (tx_hash_1, metadata_2, None, propagate_flags | TxFlags.HasPosition) ],
completion_callback=writer.get_callback())
assert writer.succeeded()
# Check the cache to see that the flags are correct and that bytedata is cached.
entry = cache.get_entry(tx_hash_1)
expected_flags = propagate_flags | TxFlags.StateDispatched | TxFlags.HasByteData
assert expected_flags == entry.flags, \
f"{TxFlags.to_repr(expected_flags)} != {TxFlags.to_repr(entry.flags)}"
assert cache.have_transaction_data_cached(tx_hash_1)
# Check the store to see that the flags are correct and the bytedata is retained.
rows = self.store.read(tx_hashes=[tx_hash_1])
assert 1 == len(rows)
get_tx_hash, bytedata_get, flags_get, metadata_get = rows[0]
assert tx_1.to_bytes() == bytedata_get
assert flags_get & TxFlags.HasByteData != 0
