def create_menu(self, position: QPoint) -> None:
self.selectedIndexes()
item = self.currentItem()
if not item:
return
column = self.currentColumn()
account_id = item.data(Columns.STATUS, self.ACCOUNT_ROLE)
tx_hash = item.data(Columns.STATUS, self.TX_ROLE)
if account_id is None or tx_hash is None:
return
if column == 0:
column_title = "ID"
column_data = hash_to_hex_str(tx_hash)
else:
column_title = self.headerItem().text(column)
column_data = item.text(column).strip()
account = self._wallet.get_account(account_id)
tx_id = hash_to_hex_str(tx_hash)
tx_URL = web.BE_URL(self.config, 'tx', tx_id)
height, _conf, _timestamp = self._wallet.get_tx_height(tx_hash)
tx = account.get_transaction(tx_hash)
if not tx:
return # this happens sometimes on account synch when first starting up.
is_unconfirmed = height <= 0
menu = QMenu()
menu.addAction(
_("Copy {}").format(column_title),
lambda: self._main_window.app.clipboard().setText(column_data))
if column in self.editable_columns:
# We grab a fresh reference to the current item, as it has been deleted in a
# reported issue.
menu.addAction(
_("Edit {}").format(column_title),
lambda: self.currentItem() and self.editItem(
self.currentItem(), column))
menu.addAction(_("Details"),
lambda: self._main_window.show_transaction(account, tx))
if is_unconfirmed and tx:
child_tx = account.cpfp(tx, 0)
if child_tx:
menu.addAction(
_("Child pays for parent"),
lambda: self._main_window.cpfp(account, tx, child_tx))
entry = self._account.get_transaction_entry(tx_hash)
if entry.flags & TxFlags.PaysInvoice:
invoice_row = self._account.invoices.get_invoice_for_tx_hash(
tx_hash)
invoice_id = invoice_row.invoice_id if invoice_row is not None else None
action = menu.addAction(
read_QIcon(ICON_NAME_INVOICE_PAYMENT), _("View invoice"),
partial(self._show_invoice_window, invoice_id))
action.setEnabled(invoice_id is not None)
if tx_URL:
menu.addAction(_("View on block explorer"),
lambda: webbrowser.open(tx_URL))
menu.exec_(self.viewport().mapToGlobal(position))
def create_menu(self, position):
self.selectedIndexes()
item = self.currentItem()
if not item:
return
column = self.currentColumn()
edit_data = item.data(0, Qt.UserRole)
if not edit_data:
return
account_id, tx_hash = edit_data
if column == 0:
column_title = "ID"
column_data = hash_to_hex_str(tx_hash)
else:
column_title = self.headerItem().text(column)
column_data = item.text(column).strip()
account = self._wallet.get_account(account_id)
tx_id = hash_to_hex_str(tx_hash)
tx_URL = web.BE_URL(self.config, 'tx', tx_id)
height, _conf, _timestamp = account.get_tx_height(tx_hash)
tx = account.get_transaction(tx_hash)
if not tx:
return # this happens sometimes on account synch when first starting up.
is_unconfirmed = height <= 0
pr_key = account.invoices.paid.get(tx_hash)
menu = QMenu()
menu.addAction(
_("Copy {}").format(column_title),
lambda: self._main_window.app.clipboard().setText(column_data))
if column in self.editable_columns:
# We grab a fresh reference to the current item, as it has been deleted in a
# reported issue.
menu.addAction(
_("Edit {}").format(column_title),
lambda: self.currentItem() and self.editItem(
self.currentItem(), column))
label = account.get_transaction_label(tx_hash) or None
menu.addAction(
_("Details"),
lambda: self._main_window.show_transaction(account, tx, label))
if is_unconfirmed and tx:
child_tx = account.cpfp(tx, 0)
if child_tx:
menu.addAction(
_("Child pays for parent"),
lambda: self._main_window.cpfp(account, tx, child_tx))
if pr_key:
menu.addAction(read_QIcon("seal"), _("View invoice"),
lambda: self._main_window.show_invoice(pr_key))
if tx_URL:
menu.addAction(_("View on block explorer"),
lambda: webbrowser.open(tx_URL))
menu.exec_(self.viewport().mapToGlobal(position))
def deserialize_getheaders(cls, f):
"""for checking my own getheaders request"""
version = bitcoinx.read_le_uint32(f.read)
hash_count = bitcoinx.read_varint(f.read)
block_locator_hashes = []
for i in range(hash_count):
block_locator_hashes.append(bitcoinx.hash_to_hex_str(f.read(32)))
hash_stop = bitcoinx.hash_to_hex_str(f.read(32))
message = {'version': version,
'hash_count': hash_count,
'block_locator_hashes': block_locator_hashes,
'hash_stop': hash_stop}
return message
def delete(self, tx_hash: bytes,
completion_callback: Optional[CompletionCallbackType]=None) -> None:
with self._lock:
self._logger.debug("cache_deletion: %s", hash_to_hex_str(tx_hash))
del self._cache[tx_hash]
self._store.delete([ tx_hash ], completion_callback=completion_callback)
def _on_transaction_deleted(self, account_id: int, tx_hash: bytes) -> None:
if not self._validate_account_event({account_id}):
return
self._logger.debug("_on_transaction_deleted %s",
hash_to_hex_str(tx_hash))
self._mark_transactions_removed([tx_hash])
def validate_block_header(header):
""" Takes in a single block header; returns True if valid block; False if invalid
Validation checks to be performed
(1) checks that calculated block hash is < target (difficulty)
(2) checks that this hashed block contains a "prev_block_hash" field equal to
the prior block calculated hash
(3) check than target is set as per the consensus difficulty adjustment algorithm (NOT DONE HERE)
see 'validate_header_difficulty()' --> this phase 2 check is done on the whole database in one go """
# extract nbits as int direct from byte position 72:76 in header
target = Validate.bits_to_target(bitcoinx.unpack_le_int32(header[72:72 + 4])[0])
# get block hash
block_hash = get_block_hash(header)
prev_hash_que.append(block_hash)
# check if hash of current block is less than nbits "target"
is_less_than_target = int(block_hash, 16) < target
if is_less_than_target:
pass
else:
raise ValueError("hash of current block is not less than nbits target!")
# check if prev_block_hash matches the last block on record in db
# genesis block (#0) is not sent with "headers" message so first block is the block after genesis (#1)
prev_block_hash = bitcoinx.hash_to_hex_str(header[4:36])
if prev_block_hash == prev_hash_que.pop(0):
return True
else:
return False
def test_update_flags(self):
cache = TxCache(self.store)
tx_bytes_1 = bytes.fromhex(tx_hex_1)
tx_hash_bytes_1 = bitcoinx.double_sha256(tx_bytes_1)
tx_id_1 = bitcoinx.hash_to_hex_str(tx_hash_bytes_1)
data = TxData(position=11)
cache.add([(tx_id_1, data, tx_bytes_1, TxFlags.StateDispatched)])
self.assertTrue(cache.is_cached(tx_id_1))
entry = cache.get_entry(tx_id_1)
self.assertEqual(
TxFlags.HasByteData | TxFlags.HasPosition
| TxFlags.StateDispatched, entry.flags)
self.assertIsNotNone(entry.bytedata)
cache.update_flags(tx_id_1, TxFlags.StateCleared,
TxFlags.HasByteData | TxFlags.HasProofData)
entry = cache.get_entry(tx_id_1)
store_flags = self.store.get_flags(tx_id_1)
expected_flags = TxFlags.HasByteData | TxFlags.HasPosition | TxFlags.StateCleared
self.assertEqual(
expected_flags, store_flags,
f"{TxFlags.to_repr(expected_flags)} != {TxFlags.to_repr(store_flags)}"
)
self.assertEqual(
expected_flags, entry.flags,
f"{TxFlags.to_repr(expected_flags)} != {TxFlags.to_repr(entry.flags)}"
)
self.assertIsNotNone(entry.bytedata)
def _parse_input(vds):
d = {}
prevout_hash = hash_to_hex_str(vds.read_bytes(32))
prevout_n = vds.read_uint32()
scriptSig = vds.read_bytes(vds.read_compact_size())
sequence = vds.read_uint32()
d['prevout_hash'] = prevout_hash
d['prevout_n'] = prevout_n
d['sequence'] = sequence
d['address'] = UnknownAddress()
if prevout_hash == '00' * 32:
d['type'] = 'coinbase'
d['scriptSig'] = bh2u(scriptSig)
else:
d['x_pubkeys'] = []
d['pubkeys'] = []
d['signatures'] = {}
d['address'] = None
d['type'] = 'unknown'
d['num_sig'] = 0
d['scriptSig'] = bh2u(scriptSig)
_parse_scriptSig(d, scriptSig)
if not Transaction.is_txin_complete(d):
d['value'] = vds.read_uint64()
return d
def test_add_then_update(self):
cache = TxCache(self.store)
bytedata_1 = bytes.fromhex(tx_hex_1)
tx_id_1 = bitcoinx.hash_to_hex_str(bitcoinx.double_sha256(bytedata_1))
metadata_1 = TxData(position=11)
cache.add([(tx_id_1, metadata_1, bytedata_1, TxFlags.StateDispatched)])
self.assertTrue(cache.is_cached(tx_id_1))
entry = cache.get_entry(tx_id_1)
self.assertEqual(
TxFlags.HasByteData | TxFlags.HasPosition
| TxFlags.StateDispatched, entry.flags)
self.assertIsNotNone(entry.bytedata)
metadata_2 = TxData(fee=10, height=88)
propagate_flags = TxFlags.HasFee | TxFlags.HasHeight
cache.update([(tx_id_1, metadata_2, None,
propagate_flags | TxFlags.HasPosition)])
entry = cache.get_entry(tx_id_1)
expected_flags = propagate_flags | TxFlags.StateDispatched | TxFlags.HasByteData
self.assertEqual(
expected_flags, entry.flags,
f"{TxFlags.to_repr(expected_flags)} != {TxFlags.to_repr(entry.flags)}"
)
self.assertIsNotNone(entry.bytedata)
def _create_menu(self, position) -> None:
item = self.currentItem()
if not item:
return
column = self.currentColumn()
column_title = self.headerItem().text(column)
column_data = item.text(column).strip()
tx_hash = item.data(InputColumns.INDEX, Roles.TX_HASH)
have_tx = self.parent()._account.have_transaction_data(tx_hash)
tx_id = hash_to_hex_str(tx_hash)
tx_URL = web.BE_URL(self._main_window.config, 'tx', tx_id)
menu = QMenu()
menu.addAction(
_("Copy {}").format(column_title),
lambda: self._main_window.app.clipboard().setText(column_data))
details_menu = menu.addAction(
_("Transaction details"),
partial(self._show_other_transaction, tx_hash))
details_menu.setEnabled(have_tx)
if tx_URL:
menu.addAction(_("View on block explorer"),
lambda: webbrowser.open(tx_URL))
menu.exec_(self.viewport().mapToGlobal(position))
def test_update_many(self):
to_add = []
for i in range(10):
tx_bytes = os.urandom(10)
tx_hash_bytes = bitcoinx.double_sha256(tx_bytes)
tx_id = bitcoinx.hash_to_hex_str(tx_hash_bytes)
tx_data = TxData(height=None, fee=2, position=None, timestamp=None)
to_add.append((tx_id, tx_data, tx_bytes, TxFlags.Unset))
self.store.add_many(to_add)
to_update = []
for tx_id, metadata, tx_bytes, flags in to_add:
tx_metadata = TxData(height=1,
fee=2,
position=None,
timestamp=None)
to_update.append((tx_id, tx_metadata, tx_bytes, flags))
self.store.update_many(to_update)
for tx_id_get, metadata_get, bytedata_get, flags_get in self.store.get_many(
):
for update_tx_id, update_metadata, update_tx_bytes, update_flags in to_update:
if update_tx_id == tx_id_get:
self.assertEqual(metadata_get, update_metadata)
self.assertEqual(bytedata_get, update_tx_bytes)
continue
def test_update_flags(self):
bytedata = os.urandom(10)
tx_hash_bytes = bitcoinx.double_sha256(bytedata)
tx_id = bitcoinx.hash_to_hex_str(tx_hash_bytes)
metadata = TxData(height=1, fee=2, position=None, timestamp=None)
self.store.add(tx_id, metadata, bytedata)
# Verify the field flags are assigned correctly on the add.
expected_flags = TxFlags.HasFee | TxFlags.HasHeight | TxFlags.HasByteData
flags = self.store.get_flags(tx_id)
self.assertEqual(expected_flags, flags)
flags = TxFlags.StateReceived
mask = TxFlags.METADATA_FIELD_MASK | TxFlags.HasByteData | TxFlags.HasProofData
self.store.update_flags(tx_id, flags, mask)
# Verify the state flag is correctly added via the mask.
flags_get = self.store.get_flags(tx_id)
expected_flags |= TxFlags.StateReceived
self.assertEqual(
expected_flags, flags_get,
f"{TxFlags.to_repr(expected_flags)} != {TxFlags.to_repr(flags_get)}"
)
flags = TxFlags.StateReceived
mask = TxFlags.Unset
self.store.update_flags(tx_id, flags, mask)
# Verify the state flag is correctly set via the mask.
flags = self.store.get_flags(tx_id)
self.assertEqual(TxFlags.StateReceived, flags)
def test_Bitcoin(raw_header, header_hash, version, prev_hash, merkle_root,
timestamp, bits, nonce):
header_hash = hex_str_to_hash(header_hash)
prev_hash = hex_str_to_hash(prev_hash)
merkle_root = hex_str_to_hash(merkle_root)
assert Bitcoin.header_hash(raw_header) == header_hash
assert Bitcoin.header_prev_hash(raw_header) == prev_hash
assert Bitcoin.header_work(raw_header) == bits_to_work(bits)
assert Bitcoin.header_timestamp(raw_header) == timestamp
header = Bitcoin.deserialized_header(raw_header, 0)
assert header.version == version
assert header.prev_hash == prev_hash
assert header.merkle_root == merkle_root
assert header.timestamp == timestamp
assert header.bits == bits
assert header.nonce == nonce
assert header.raw == raw_header
assert header.hash == header_hash
assert header.height == 0
assert header.work() == Bitcoin.header_work(raw_header)
assert header.target() == bits_to_target(bits)
assert header.hash_value() == hash_to_value(header_hash)
assert header.hex_str() == hash_to_hex_str(header_hash)
assert 'height=0' in str(header)
def _write(db: sqlite3.Connection):
self._logger.debug("deleting transactions %s",
[hash_to_hex_str(b[0]) for b in datas])
db.executemany(TransactionDeltaTable.DELETE_TRANSACTION_SQL, datas)
db.executemany(TransactionOutputTable.DELETE_TRANSACTION_SQL,
datas)
db.executemany(self.DELETE_SQL, datas)
def _update_transactions(self, tx_hashes: List[bytes], state: Dict[bytes, EventFlags]) -> None:
self._logger.debug("_update_transactions %d", len(tx_hashes))
if not len(tx_hashes):
return
matches = self._match_transactions(tx_hashes)
if len(matches) != len(tx_hashes):
matched_tx_hashes = [ line.hash for (row, line) in matches ]
# The add database write has not completed yet.
self._logger.debug("_update_transactions missing entries %s",
[ hash_to_hex_str(a) for a in tx_hashes if a not in matched_tx_hashes ])
if not len(matches):
return
matches_by_hash = dict((t[1].hash, t) for t in matches)
matched_tx_hashes = list(matches_by_hash.keys())
for tx_hash, tx_flags, tx_data in self._wallet.read_transaction_metadatas(
tx_hashes=matched_tx_hashes, account_id=self._account_id):
row, line = matches_by_hash[tx_hash]
new_line = self._create_transaction_entry(tx_hash, tx_data)
self._data[row] = new_line
self._base_model.invalidate_row(row)
self.changed_signal.emit(self._account_id)
def test_update_or_add(self):
cache = TxCache(self.store)
# Add.
bytedata_1 = bytes.fromhex(tx_hex_1)
tx_hash_bytes_1 = bitcoinx.double_sha256(bytedata_1)
tx_id_1 = bitcoinx.hash_to_hex_str(tx_hash_bytes_1)
metadata_1 = TxData()
cache.update_or_add([(tx_id_1, metadata_1, bytedata_1,
TxFlags.StateCleared)])
self.assertTrue(cache.is_cached(tx_id_1))
entry = cache.get_entry(tx_id_1)
self.assertEqual(TxFlags.HasByteData | TxFlags.StateCleared,
entry.flags)
self.assertIsNotNone(entry.bytedata)
# Update.
metadata_2 = TxData(position=22)
cache.update_or_add([(tx_id_1, metadata_2, None,
TxFlags.HasPosition | TxFlags.StateDispatched)])
entry = cache.get_entry(tx_id_1)
store_flags = self.store.get_flags(tx_id_1)
# State flags if present get set in an update otherwise they remain the same.
expected_flags = TxFlags.HasPosition | TxFlags.HasByteData | TxFlags.StateDispatched
self.assertEqual(
expected_flags, store_flags,
f"{TxFlags.to_repr(expected_flags)} != {TxFlags.to_repr(store_flags)}"
)
self.assertEqual(
expected_flags, entry.flags,
f"{TxFlags.to_repr(expected_flags)} != {TxFlags.to_repr(entry.flags)}"
)
self.assertEqual(bytedata_1, entry.bytedata)
self.assertEqual(metadata_2.position, entry.metadata.position)
def update_row(self, row: int, values: Dict[int, Any]) -> bool:
old_line = self._data[row]
tx_id = hash_to_hex_str(old_line.hash)
self._logger.debug("update_line tx=%s idx=%d", tx_id, row)
if len(values):
l = list(old_line)
for value_index, value in values.items():
l[value_index] = value
new_line = self._data[row] = TxLine(*l)
old_key = get_sort_key(old_line)
new_key = get_sort_key(new_line)
if old_key != new_key:
# We need to move the line, so it is more than a simple row update.
self.remove_row(row)
insert_row = self._add_line(new_line)
return True
start_index = self.createIndex(row, 0)
column_count = self.columnCount(start_index)
end_index = self.createIndex(row, column_count-1)
self.dataChanged.emit(start_index, end_index)
return True
def test_get_many(self):
to_add = []
for i in range(10):
tx_bytes = os.urandom(10)
tx_hash_bytes = bitcoinx.double_sha256(tx_bytes)
tx_id = bitcoinx.hash_to_hex_str(tx_hash_bytes)
tx_data = TxData(height=None, fee=2, position=None, timestamp=None)
to_add.append((tx_id, tx_data, tx_bytes, TxFlags.HasFee))
self.store.add_many(to_add)
# Test the first "add" id is matched.
matches = self.store.get_many(tx_ids=[to_add[0][0]])
self.assertEqual(to_add[0][0], matches[0][0])
# Test no id is matched.
matches = self.store.get_many(tx_ids=["aaaa"])
self.assertEqual(0, len(matches))
# Test flag and mask combinations.
matches = self.store.get_many(flags=TxFlags.HasFee)
self.assertEqual(10, len(matches))
matches = self.store.get_many(flags=TxFlags.Unset,
mask=TxFlags.HasHeight)
self.assertEqual(10, len(matches))
matches = self.store.get_many(flags=TxFlags.HasFee,
mask=TxFlags.HasFee)
self.assertEqual(10, len(matches))
matches = self.store.get_many(flags=TxFlags.Unset, mask=TxFlags.HasFee)
self.assertEqual(0, len(matches))
def _validate_new_flags(tx_hash: bytes, flags: TxFlags) -> None:
# All current states are expected to have bytedata.
if (flags & TxFlags.STATE_MASK) == 0 or (flags
& TxFlags.HasByteData) != 0:
return
tx_id = hash_to_hex_str(tx_hash)
raise InvalidDataError("setting uncleared state without bytedata "
f"{tx_id} {TxFlags.to_repr(flags)}")
def get_name(self, other_chain):
if other_chain is self:
return f'our_chain'
else:
fork_height = self.common_height(other_chain) + 1
header = self.header_at_height(fork_height)
prefix = hash_to_hex_str(header.hash).lstrip('00')[0:10]
return f'{prefix}@{fork_height}'
def _on_transaction_added(self, tx_hash: bytes, tx: Transaction, account_ids: Set[int]) \
-> None:
if not self._validate_account_event(account_ids):
return
self._logger.debug("_on_transaction_added %s", hash_to_hex_str(tx_hash))
with self._update_lock:
self._pending_state[tx_hash] = EventFlags.TX_ADDED
def _on_transaction_deleted(self, wallet_path: str, account_id: int,
tx_hash: bytes) -> None:
if not self._validate_event(wallet_path, account_id):
return
self._logger.debug("_on_transaction_deleted %s",
hash_to_hex_str(tx_hash))
self.remove_transactions([tx_hash])
def chain_name(self, chain, our_chain):
if chain is our_chain:
return f'our_chain'
_chain, common_height = our_chain.common_chain_and_height(chain)
fork_height = common_height + 1
header = self.header_at_height(fork_height)
prefix = hash_to_hex_str(header.hash).lstrip('00')[0:10]
return f'{prefix}@{fork_height}'
def get_and_set_frozen_utxos_for_tx(self, tx: Transaction, child_wallet: AbstractAccount,
freeze: bool=True) -> List[UTXO]:
spendable_coins = child_wallet.get_utxos(exclude_frozen=False)
input_keys = set(
[(bitcoinx.hash_to_hex_str(input.prev_hash), input.prev_idx) for input in tx.inputs])
frozen_utxos = [utxo for utxo in spendable_coins if utxo.key() in input_keys]
child_wallet.set_frozen_coin_state(frozen_utxos, freeze)
return frozen_utxos
def test_delete(self):
tx_bytes = os.urandom(10)
tx_hash_bytes = bitcoinx.double_sha256(tx_bytes)
tx_id = bitcoinx.hash_to_hex_str(tx_hash_bytes)
data = TxData(height=1, fee=2, position=None, timestamp=None)
self.store.add(tx_id, data, tx_bytes)
self.assertTrue(self.store.has(tx_id))
self.store.delete(tx_id)
self.assertFalse(self.store.has(tx_id))
def _write(db: sqlite3.Connection) -> None:
if len(entries) < 20:
self._logger.debug(
"update %d transactions: %s", len(entries),
[(hash_to_hex_str(a), b, byte_repr(c), TxFlags.to_repr(d))
for (a, b, c, d) in entries])
else:
self._logger.debug("update %d transactions (too many to show)",
len(entries))
db.executemany(self.UPDATE_MANY_SQL, datas)
def utxo_as_dict(self, utxo):
return {"value": utxo.value,
"script_pubkey": utxo.script_pubkey.to_hex(),
"script_type": utxo.script_type,
"tx_hash": hash_to_hex_str(utxo.tx_hash),
"out_index": utxo.out_index,
"keyinstance_id": utxo.keyinstance_id,
"address": utxo.address.to_string(),
"is_coinbase": utxo.is_coinbase,
"flags": utxo.flags} # TransactionOutputFlag(s) only
def deserialize_headers(cls, f):
"""deserialize block headers into a list of dicts"""
lst_headers = []
global headers_stream
global hashes_stream
# Store headers temporarily to memory as binary stream
headers_stream.seek(0)
headers_stream.write(f.read())
# make a list of block hashes for validating
headers_stream.seek(0)
count = bitcoinx.read_varint(headers_stream.read) # count of headers
for i in range(count):
header = headers_stream.read(80) # minus final txn count (1 byte)
headers_stream.read(1) # discard txn count
_hash = simple_spv.tools.get_block_hash(header) # calculates hash as part of validation
hashes_stream.write(_hash + '\n')
f.seek(0)
number_headers = bitcoinx.read_varint(f.read)
for i in range(number_headers):
# TODO make into single function call for readability and reuse
version = bitcoinx.read_le_int32(f.read)
prev_block = bitcoinx.hash_to_hex_str(f.read(32))
merkle_root = bitcoinx.hash_to_hex_str(f.read(32))
timestamp = bitcoinx.read_le_uint32(f.read)
bits = ut.int_to_hex(bitcoinx.read_le_uint32(f.read))
nonce = bitcoinx.read_le_uint32(f.read)
txn_count = bitcoinx.read_varint(f.read)
block_header = {'version': version,
'prev_block_hash': prev_block,
'merkle_root': merkle_root,
'timestamp': timestamp,
'bits': bits,
'nonce': nonce,
'txn_count': txn_count}
lst_headers.append(block_header)
return lst_headers
def test_get_unverified_entries_too_high(self):
cache = TxCache(self.store)
tx_bytes_1 = bytes.fromhex(tx_hex_1)
tx_hash_bytes_1 = bitcoinx.double_sha256(tx_bytes_1)
tx_id_1 = bitcoinx.hash_to_hex_str(tx_hash_bytes_1)
data = TxData(height=11, position=22)
cache.add([(tx_id_1, data, tx_bytes_1, TxFlags.StateCleared)])
results = cache.get_unverified_entries(100)
self.assertEqual(0, len(results))
def test_get_transaction(self):
bytedata = bytes.fromhex(tx_hex_1)
tx_hash_bytes = bitcoinx.double_sha256(bytedata)
tx_id = bitcoinx.hash_to_hex_str(tx_hash_bytes)
metadata = TxData(height=1, fee=2, position=None, timestamp=None)
self.store.add(tx_id, metadata, bytedata)
cache = TxCache(self.store)
tx = cache.get_transaction(tx_id)
self.assertIsNotNone(tx)
self.assertEqual(tx_id, tx.txid())
