def get_tx(
self,
inputs: Optional[List[WalletInputInfo]] = None,
outputs: Optional[List[WalletOutputInfo]] = None) -> Transaction:
if not outputs:
address = self.get_address(0)
assert address is not None
outputs = [
WalletOutputInfo(address=decode_address(address),
value=1,
timelock=None),
WalletOutputInfo(address=decode_address(address),
value=1,
timelock=None)
]
if inputs:
tx = self.manager.wallet.prepare_transaction(
Transaction, inputs, outputs)
else:
tx = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs, self.manager.tx_storage)
tx.storage = self.manager.tx_storage
tx.weight = 1
max_ts_spent_tx = max(
tx.get_spent_tx(txin).timestamp for txin in tx.inputs)
tx.timestamp = max(max_ts_spent_tx + 1,
int(self.manager.reactor.seconds()))
tx.parents = self.manager.get_new_tx_parents(tx.timestamp)
tx.resolve()
return tx
def gen_custom_tx(manager: HathorManager, tx_inputs: List[Tuple[Transaction, int]], *, n_outputs: int = 1,
base_parent: Optional[Transaction] = None, weight: Optional[float] = None) -> Transaction:
"""Generate a custom tx based on the inputs and outputs. It gives full control to the
inputs and can be used to generate conflicts and specific patterns in the DAG."""
inputs = []
value = 0
parents = []
for tx_base, txout_index in tx_inputs:
assert tx_base.hash is not None
spent_tx = tx_base
spent_txout = spent_tx.outputs[txout_index]
p2pkh = parse_address_script(spent_txout.script)
assert isinstance(p2pkh, P2PKH)
from hathor.wallet.base_wallet import WalletInputInfo, WalletOutputInfo
value += spent_txout.value
wallet = manager.wallet
assert wallet is not None
assert spent_tx.hash is not None
private_key = wallet.get_private_key(p2pkh.address)
inputs.append(WalletInputInfo(tx_id=spent_tx.hash, index=txout_index, private_key=private_key))
if not tx_base.is_block:
parents.append(tx_base.hash)
assert wallet is not None
address = wallet.get_unused_address(mark_as_used=True)
if n_outputs == 1:
outputs = [WalletOutputInfo(address=decode_address(address), value=int(value), timelock=None)]
elif n_outputs == 2:
assert int(value) > 1
outputs = [
WalletOutputInfo(address=decode_address(address), value=int(value) - 1, timelock=None),
WalletOutputInfo(address=decode_address(address), value=1, timelock=None),
]
else:
raise NotImplementedError
tx2 = wallet.prepare_transaction(Transaction, inputs, outputs)
tx2.storage = manager.tx_storage
tx2.timestamp = max(tx_base.timestamp + 1, int(manager.reactor.seconds()))
tx2.parents = parents[:2]
if len(tx2.parents) < 2:
if base_parent:
assert base_parent.hash is not None
tx2.parents.append(base_parent.hash)
elif not tx_base.is_block:
tx2.parents.append(tx_base.parents[0])
else:
tx2.parents.extend(manager.get_new_tx_parents(tx2.timestamp))
tx2.parents = tx2.parents[:2]
assert len(tx2.parents) == 2
tx2.weight = weight or 25
tx2.update_hash()
return tx2
def test_choose_inputs(self):
blocks = add_new_blocks(self.manager, 1, advance_clock=15)
blocks_tokens = [
sum(txout.value for txout in blk.outputs) for blk in blocks
]
add_blocks_unlock_reward(self.manager)
address = self.manager.wallet.get_unused_address(mark_as_used=False)
outputs = [
WalletOutputInfo(address=decode_address(address),
value=blocks_tokens[0],
timelock=int(self.clock.seconds()) + 10)
]
tx1 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs, self.manager.tx_storage)
tx1.weight = 10
tx1.parents = self.manager.get_new_tx_parents()
tx1.timestamp = int(self.clock.seconds())
tx1.resolve()
self.manager.propagate_tx(tx1)
self.clock.advance(1)
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(blocks_tokens[0], 0))
outputs = [
WalletOutputInfo(address=decode_address(address),
value=blocks_tokens[0],
timelock=None)
]
with self.assertRaises(InsufficientFunds):
self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs, self.manager.tx_storage)
self.clock.advance(10)
tx2 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs, self.manager.tx_storage)
tx2.weight = 10
tx2.parents = self.manager.get_new_tx_parents()
tx2.timestamp = int(self.clock.seconds())
tx2.resolve()
self.manager.propagate_tx(tx2)
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, blocks_tokens[0]))
def test_transaction_and_balance(self):
# generate a new block and check if we increase balance
new_address = self.wallet.get_unused_address()
out = WalletOutputInfo(decode_address(new_address), self.TOKENS, timelock=None)
block = add_new_block(self.manager)
block.verify()
utxo = self.wallet.unspent_txs[settings.HATHOR_TOKEN_UID].get((block.hash, 0))
self.assertIsNotNone(utxo)
self.assertEqual(self.wallet.balance[settings.HATHOR_TOKEN_UID], WalletBalance(0, self.BLOCK_TOKENS))
# create transaction spending this value, but sending to same wallet
new_address2 = self.wallet.get_unused_address()
out = WalletOutputInfo(decode_address(new_address2), self.TOKENS, timelock=None)
tx1 = self.wallet.prepare_transaction_compute_inputs(Transaction, outputs=[out])
tx1.update_hash()
tx1.verify_script(tx1.inputs[0], block)
tx1.storage = self.tx_storage
self.wallet.on_new_tx(tx1)
self.tx_storage.save_transaction(tx1)
self.assertEqual(len(self.wallet.spent_txs), 1)
utxo = self.wallet.unspent_txs[settings.HATHOR_TOKEN_UID].get((tx1.hash, 0))
self.assertIsNotNone(utxo)
self.assertEqual(self.wallet.balance[settings.HATHOR_TOKEN_UID], WalletBalance(0, self.TOKENS))
# pass inputs and outputs to prepare_transaction, but not the input keys
# spend output last transaction
input_info = WalletInputInfo(tx1.hash, 0, None)
new_address3 = self.wallet.get_unused_address()
out = WalletOutputInfo(decode_address(new_address3), self.TOKENS, timelock=None)
tx2 = self.wallet.prepare_transaction_incomplete_inputs(Transaction, inputs=[input_info],
outputs=[out], tx_storage=self.tx_storage)
tx2.storage = self.tx_storage
tx2.update_hash()
tx2.storage = self.tx_storage
tx2.verify_script(tx2.inputs[0], tx1)
self.tx_storage.save_transaction(tx2)
self.wallet.on_new_tx(tx2)
self.assertEqual(len(self.wallet.spent_txs), 2)
self.assertEqual(self.wallet.balance[settings.HATHOR_TOKEN_UID], WalletBalance(0, self.TOKENS))
# Test getting more unused addresses than the gap limit
for i in range(3):
kwargs = {'mark_as_used': True}
if i == 2:
# Last one we dont mark as used
kwargs['mark_as_used'] = False
self.wallet.get_unused_address(**kwargs)
def gen_new_double_spending(manager: HathorManager, *, use_same_parents: bool = False) -> Transaction:
tx_interval = random.choice(list(manager.tx_storage.get_tx_tips()))
tx = manager.tx_storage.get_transaction(tx_interval.data)
txin = random.choice(tx.inputs)
from hathor.transaction.scripts import P2PKH, parse_address_script
spent_tx = tx.get_spent_tx(txin)
spent_txout = spent_tx.outputs[txin.index]
p2pkh = parse_address_script(spent_txout.script)
assert isinstance(p2pkh, P2PKH)
from hathor.wallet.base_wallet import WalletInputInfo, WalletOutputInfo
value = spent_txout.value
private_key = manager.wallet.get_private_key(p2pkh.address)
inputs = [WalletInputInfo(tx_id=txin.tx_id, index=txin.index, private_key=private_key)]
address = manager.wallet.get_unused_address(mark_as_used=True)
outputs = [WalletOutputInfo(address=decode_address(address), value=int(value), timelock=None)]
tx2 = manager.wallet.prepare_transaction(Transaction, inputs, outputs, manager.tx_storage)
tx2.storage = manager.tx_storage
tx2.weight = 1
tx2.timestamp = max(tx.timestamp + 1, int(manager.reactor.seconds()))
if use_same_parents:
tx2.parents = list(tx.parents)
else:
tx2.parents = manager.get_new_tx_parents(tx2.timestamp)
tx2.resolve()
return tx2
def setUp(self):
super().setUp()
self.network = 'testnet'
self.manager = self.create_peer(self.network, unlock_wallet=True)
self.tx_storage = self.manager.tx_storage
data = b'This is a test block.'
self.blocks = add_new_blocks(self.manager, 3, advance_clock=15, block_data=data)
address = self.get_address(0)
value = 100
outputs = [
WalletOutputInfo(address=decode_address(address), value=int(value), timelock=None)
]
self.tx1 = self.manager.wallet.prepare_transaction_compute_inputs(Transaction, outputs)
self.tx1.weight = 10
self.tx1.parents = self.manager.get_new_tx_parents()
self.tx1.timestamp = int(self.clock.seconds())
self.tx1.resolve()
self.manager.propagate_tx(self.tx1)
# Change of parents only, so it's a twin.
# With less weight, so the balance will continue because tx1 will be the winner
self.tx2 = Transaction.create_from_struct(self.tx1.get_struct())
self.tx2.parents = [self.tx1.parents[1], self.tx1.parents[0]]
self.tx2.weight = 9
self.tx2.resolve()
# Propagate a conflicting twin transaction
self.manager.propagate_tx(self.tx2)
def test_maybe_spent_txs(self):
add_new_block(self.manager, advance_clock=15)
blocks = add_blocks_unlock_reward(self.manager)
w = self.manager.wallet
new_address = w.get_unused_address()
out = WalletOutputInfo(decode_address(new_address), 1, timelock=None)
tx1 = w.prepare_transaction_compute_inputs(Transaction, outputs=[out])
self.assertEqual(len(tx1.inputs), 1)
_input = tx1.inputs[0]
key = (_input.tx_id, _input.index)
self.assertNotIn(key, w.unspent_txs[settings.HATHOR_TOKEN_UID])
self.assertIn(key, w.maybe_spent_txs[settings.HATHOR_TOKEN_UID])
self.run_to_completion()
self.assertIn(key, w.unspent_txs[settings.HATHOR_TOKEN_UID])
self.assertEqual(0, len(w.maybe_spent_txs[settings.HATHOR_TOKEN_UID]))
# when we receive the new tx it will remove from maybe_spent
tx2 = w.prepare_transaction_compute_inputs(Transaction, outputs=[out])
tx2.storage = self.manager.tx_storage
tx2.timestamp = max(
tx2.get_spent_tx(txin).timestamp for txin in tx2.inputs) + 1
tx2.parents = self.manager.get_new_tx_parents(tx2.timestamp)
tx2.weight = 1
tx2.timestamp = blocks[-1].timestamp + 1
tx2.resolve()
self.assertTrue(self.manager.on_new_tx(tx2, fails_silently=False))
self.clock.advance(2)
self.assertEqual(0, len(w.maybe_spent_txs[settings.HATHOR_TOKEN_UID]))
def setUp(self):
super().setUp()
self.network = 'testnet'
self.manager = self.create_peer(self.network, unlock_wallet=True)
blocks = add_new_blocks(self.manager, 3, advance_clock=15)
self.blocks_tokens = [
sum(txout.value for txout in blk.outputs) for blk in blocks
]
address = self.get_address(0)
value = 100
self.initial_balance = sum(self.blocks_tokens[:3]) - 100
outputs = [
WalletOutputInfo(address=decode_address(address),
value=int(value),
timelock=None)
]
add_blocks_unlock_reward(self.manager)
self.tx1 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs)
self.tx1.weight = 10
self.tx1.parents = self.manager.get_new_tx_parents()
self.tx1.timestamp = int(self.clock.seconds())
self.tx1.resolve()
self.manager.propagate_tx(self.tx1)
self.run_to_completion()
def test_invalid_address(self):
w = Wallet(directory=self.directory)
w.unlock(PASSWORD)
# creating valid address
valid_address = '15d14K5jMqsN2uwUEFqiPG5SoD7Vr1BfnH'
WalletOutputInfo(decode_address(valid_address), 100, None)
# creating invalid address
invalid_address = '5d14K5jMqsN2uwUEFqiPG5SoD7Vr1BfnH'
with self.assertRaises(InvalidAddress):
WalletOutputInfo(decode_address(invalid_address), 100, None)
# invalid address (checksum invalid)
invalid_address2 = '15d14K5jMqsN2uwUEFqiPG5SoD7Vr1Bfnq'
with self.assertRaises(InvalidAddress):
WalletOutputInfo(decode_address(invalid_address2), 100, None)
def test_create_token_transaction(self):
add_new_block(self.manager, advance_clock=5)
add_blocks_unlock_reward(self.manager)
tx = create_tokens(self.manager)
tokens_created = tx.outputs[0].value
token_uid = tx.tokens[0]
address_b58 = self.manager.wallet.get_unused_address()
address = decode_address(address_b58)
_, hathor_balance = self.manager.wallet.balance[
settings.HATHOR_TOKEN_UID]
# prepare tx with hathors and another token
# hathor tx
hathor_out = WalletOutputInfo(address, hathor_balance, None)
# token tx
token_out = WalletOutputInfo(address, tokens_created - 20, None,
token_uid.hex())
tx2 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, [hathor_out, token_out])
tx2.storage = self.manager.tx_storage
tx2.timestamp = tx.timestamp + 1
tx2.parents = self.manager.get_new_tx_parents()
tx2.resolve()
tx2.verify()
self.assertNotEqual(len(tx2.inputs), 0)
token_dict = defaultdict(int)
for _input in tx2.inputs:
output_tx = self.manager.tx_storage.get_transaction(_input.tx_id)
output = output_tx.outputs[_input.index]
token_uid = output_tx.get_token_uid(output.get_token_index())
token_dict[token_uid] += output.value
# make sure balance is the same and we've checked both balances
did_enter = 0
for token_uid, value in token_dict.items():
if token_uid == settings.HATHOR_TOKEN_UID:
self.assertEqual(value, hathor_balance)
did_enter += 1
elif token_uid == token_uid:
self.assertEqual(value, tokens_created)
did_enter += 1
self.assertEqual(did_enter, 2)
def test_twin_tx(self):
add_new_blocks(self.manager, 5, advance_clock=15)
add_blocks_unlock_reward(self.manager)
address = self.get_address(0)
value1 = 100
value2 = 101
outputs = [
WalletOutputInfo(address=decode_address(address),
value=int(value1),
timelock=None),
WalletOutputInfo(address=decode_address(address),
value=int(value2),
timelock=None)
]
tx1 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs, self.manager.tx_storage)
tx1.weight = 10
tx1.parents = self.manager.get_new_tx_parents()
tx1.timestamp = int(self.clock.seconds())
tx1.resolve()
# Change of parents only, so it's a twin
tx2 = Transaction.create_from_struct(tx1.get_struct())
tx2.parents = [tx1.parents[1], tx1.parents[0]]
tx2.resolve()
self.assertNotEqual(tx1.hash, tx2.hash)
self.manager.propagate_tx(tx1)
self.run_to_completion()
wallet_data = self.manager.tx_storage.wallet_index.get_from_address(
address)
self.assertEqual(len(wallet_data), 1)
self.assertEqual(wallet_data, [tx1.hash])
# Propagate a conflicting twin transaction
self.manager.propagate_tx(tx2)
self.run_to_completion()
wallet_data = self.manager.tx_storage.wallet_index.get_from_address(
address)
self.assertEqual(len(wallet_data), 2)
self.assertEqual(set(wallet_data), set([tx1.hash, tx2.hash]))
def test_prepare_transaction(self):
block = add_new_block(self.manager, advance_clock=5)
w = self.manager.wallet
new_address = w.get_unused_address()
out = WalletOutputInfo(decode_address(new_address), 1, timelock=None)
with self.assertRaises(InsufficientFunds):
w.prepare_transaction_compute_inputs(Transaction,
outputs=[out],
timestamp=block.timestamp)
def test_insuficient_funds(self):
w = Wallet(directory=self.directory)
w.unlock(PASSWORD)
# create transaction spending some value
new_address = w.get_unused_address()
out = WalletOutputInfo(decode_address(new_address), 100, timelock=None)
with self.assertRaises(InsufficientFunds):
w.prepare_transaction_compute_inputs(Transaction, outputs=[out])
def test_insuficient_funds(self):
add_blocks_unlock_reward(self.manager)
# create transaction spending some value
new_address = self.wallet.get_unused_address()
out = WalletOutputInfo(decode_address(new_address),
self.TOKENS,
timelock=None)
with self.assertRaises(InsufficientFunds):
self.wallet.prepare_transaction_compute_inputs(
Transaction, [out], self.tx_storage)
def test_balance_update4(self):
# Tx2 spends Tx1 output
# Tx3 is twin of Tx2 with same acc weight, so both will get voided
self.manager.reactor.advance(1)
# Start balance
self.assertEqual(self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, self.initial_balance))
address = self.manager.wallet.get_unused_address_bytes()
value = self.blocks_tokens[0] - 100
inputs = [WalletInputInfo(tx_id=self.tx1.hash, index=0, private_key=None)]
outputs = [WalletOutputInfo(address=address, value=int(value), timelock=None)]
tx2 = self.manager.wallet.prepare_transaction_incomplete_inputs(Transaction, inputs, outputs,
self.manager.tx_storage)
tx2.weight = 10
tx2.parents = [self.tx1.hash, self.tx1.parents[0]]
tx2.timestamp = int(self.clock.seconds())
tx2.resolve()
self.manager.propagate_tx(tx2)
self.run_to_completion()
# Test create same tx with allow double spending
with self.assertRaises(PrivateKeyNotFound):
self.manager.wallet.prepare_transaction_incomplete_inputs(
Transaction,
inputs=inputs,
outputs=outputs,
tx_storage=self.manager.tx_storage
)
self.manager.wallet.prepare_transaction_incomplete_inputs(Transaction, inputs=inputs, outputs=outputs,
force=True, tx_storage=self.manager.tx_storage)
# Change of parents only, so it's a twin.
tx3 = Transaction.create_from_struct(tx2.get_struct())
tx3.parents = [tx2.parents[1], tx2.parents[0]]
tx3.resolve()
# Propagate a conflicting twin transaction
self.manager.propagate_tx(tx3)
self.run_to_completion()
meta2 = tx2.get_metadata(force_reload=True)
self.assertEqual(meta2.twins, [tx3.hash])
self.assertEqual(meta2.voided_by, {tx2.hash})
meta3 = tx3.get_metadata()
self.assertEqual(meta3.voided_by, {tx3.hash})
# Balance is the same
self.assertEqual(self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, self.initial_balance))
def test_balance_update5(self):
# Tx2 spends Tx1 output
# Tx3 is twin of Tx1, with less acc weight
# So we have conflict between all three txs but tx1 and tx2 are winners and tx3 is voided
self.clock.advance(1)
# Start balance
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, self.initial_balance))
address = self.manager.wallet.get_unused_address_bytes()
value = self.blocks_tokens[0] - 100
inputs = [
WalletInputInfo(tx_id=self.tx1.hash, index=0, private_key=None)
]
outputs = [
WalletOutputInfo(address=address, value=int(value), timelock=None)
]
tx2 = self.manager.wallet.prepare_transaction_incomplete_inputs(
Transaction, inputs, outputs, self.manager.tx_storage)
tx2.weight = 10
tx2.parents = [self.tx1.hash, self.tx1.parents[0]]
tx2.timestamp = int(self.clock.seconds())
tx2.resolve()
# Change of parents only, so it's a twin.
tx3 = Transaction.create_from_struct(self.tx1.get_struct())
tx3.parents = [self.tx1.parents[1], self.tx1.parents[0]]
tx3.resolve()
# Propagate a conflicting twin transaction
self.manager.propagate_tx(tx2)
self.manager.propagate_tx(tx3)
self.run_to_completion()
meta2 = tx2.get_metadata()
self.assertEqual(meta2.twins, [])
self.assertEqual(meta2.voided_by, None)
meta3 = tx3.get_metadata()
self.assertEqual(meta3.voided_by, {tx3.hash})
self.assertEqual(meta3.twins, [self.tx1.hash])
# Balance is the same
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, self.initial_balance))
def test_block_increase_balance(self):
# generate a new block and check if we increase balance
w = Wallet(directory=self.directory)
w.unlock(PASSWORD)
new_address = w.get_unused_address()
key = w.keys[new_address]
out = WalletOutputInfo(decode_address(key.address),
BLOCK_REWARD,
timelock=None)
tx = w.prepare_transaction(Transaction, inputs=[], outputs=[out])
tx.update_hash()
w.on_new_tx(tx)
utxo = w.unspent_txs[settings.HATHOR_TOKEN_UID].get((tx.hash, 0))
self.assertIsNotNone(utxo)
self.assertEqual(w.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, BLOCK_REWARD))
def gen_new_double_spending(manager: HathorManager, *, use_same_parents: bool = False,
tx: Optional[Transaction] = None, weight: float = 1) -> Transaction:
if tx is None:
tx_candidates = manager.get_new_tx_parents()
genesis = manager.tx_storage.get_all_genesis()
genesis_txs = [tx for tx in genesis if not tx.is_block]
# XXX: it isn't possible to double-spend a genesis transaction, thus we remove it from tx_candidates
for genesis_tx in genesis_txs:
if genesis_tx.hash in tx_candidates:
tx_candidates.remove(genesis_tx.hash)
if not tx_candidates:
raise NoCandidatesError()
# assert tx_candidates, 'Must not be empty, otherwise test was wrongly set up'
tx_hash = manager.rng.choice(tx_candidates)
tx = cast(Transaction, manager.tx_storage.get_transaction(tx_hash))
txin = manager.rng.choice(tx.inputs)
from hathor.transaction.scripts import P2PKH, parse_address_script
spent_tx = tx.get_spent_tx(txin)
spent_txout = spent_tx.outputs[txin.index]
p2pkh = parse_address_script(spent_txout.script)
assert isinstance(p2pkh, P2PKH)
from hathor.wallet.base_wallet import WalletInputInfo, WalletOutputInfo
value = spent_txout.value
wallet = manager.wallet
assert wallet is not None
private_key = wallet.get_private_key(p2pkh.address)
inputs = [WalletInputInfo(tx_id=txin.tx_id, index=txin.index, private_key=private_key)]
address = wallet.get_unused_address(mark_as_used=True)
outputs = [WalletOutputInfo(address=decode_address(address), value=int(value), timelock=None)]
tx2 = wallet.prepare_transaction(Transaction, inputs, outputs)
tx2.storage = manager.tx_storage
tx2.weight = weight
tx2.timestamp = max(tx.timestamp + 1, int(manager.reactor.seconds()))
if use_same_parents:
tx2.parents = list(tx.parents)
else:
tx2.parents = manager.get_new_tx_parents(tx2.timestamp)
tx2.resolve()
return tx2
def gen_new_tx(manager, address, value, verify=True):
from hathor.transaction import Transaction
from hathor.wallet.base_wallet import WalletOutputInfo
outputs = []
outputs.append(WalletOutputInfo(address=decode_address(address), value=int(value), timelock=None))
tx = manager.wallet.prepare_transaction_compute_inputs(Transaction, outputs)
tx.storage = manager.tx_storage
max_ts_spent_tx = max(tx.get_spent_tx(txin).timestamp for txin in tx.inputs)
tx.timestamp = max(max_ts_spent_tx + 1, int(manager.reactor.seconds()))
tx.weight = 1
tx.parents = manager.get_new_tx_parents(tx.timestamp)
tx.resolve()
if verify:
tx.verify()
return tx
def _add_new_tx(self, address, value):
from hathor.transaction import Transaction
from hathor.wallet.base_wallet import WalletOutputInfo
outputs = []
outputs.append(
WalletOutputInfo(address=decode_address(address),
value=int(value),
timelock=None))
tx = self.manager1.wallet.prepare_transaction_compute_inputs(
Transaction, outputs, self.manager1.tx_storage)
tx.timestamp = int(self.clock.seconds())
tx.storage = self.manager1.tx_storage
tx.weight = 10
tx.parents = self.manager1.get_new_tx_parents()
tx.resolve()
tx.verify()
self.manager1.propagate_tx(tx)
self.clock.advance(10)
def test_balance_update6(self):
# Tx2 is twin of tx1, so both voided
# Tx3 has tx1 as parent, so increases tx1 acc weight, then tx1 is winner against tx2
self.manager.reactor.advance(1)
# Start balance
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, self.initial_balance))
# Change of parents only, so it's a twin.
tx2 = Transaction.create_from_struct(self.tx1.get_struct())
tx2.parents = [self.tx1.parents[1], self.tx1.parents[0]]
tx2.resolve()
address = self.get_address(0)
value = 100
outputs = [
WalletOutputInfo(address=decode_address(address),
value=int(value),
timelock=None)
]
tx3 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs)
tx3.weight = 10
tx3.parents = [self.tx1.hash, self.tx1.parents[0]]
tx3.timestamp = int(self.clock.seconds())
tx3.resolve()
# Propagate a conflicting twin transaction
self.manager.propagate_tx(tx2)
self.manager.propagate_tx(tx3)
self.run_to_completion()
# Balance is the same
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, self.initial_balance - 100))
def test_balance_update_twin_tx(self):
# Start balance
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, self.initial_balance))
wallet_address = self.manager.wallet.get_unused_address()
outputs2 = [
WalletOutputInfo(address=decode_address(wallet_address),
value=500,
timelock=None)
]
tx2 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs2)
tx2.weight = 10
tx2.parents = self.manager.get_new_tx_parents()
tx2.timestamp = int(self.clock.seconds())
tx2.resolve()
self.manager.propagate_tx(tx2)
self.run_to_completion()
outputs3 = [
WalletOutputInfo(address=decode_address(wallet_address),
value=self.blocks_tokens[0],
timelock=None)
]
tx3 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs3)
tx3.weight = 10
tx3.parents = self.manager.get_new_tx_parents()
tx3.timestamp = int(self.clock.seconds())
tx3.resolve()
self.manager.propagate_tx(tx3)
self.run_to_completion()
self.clock.advance(1)
new_address = self.manager.wallet.get_unused_address_bytes()
inputs = [WalletInputInfo(tx_id=tx3.hash, index=0, private_key=None)]
outputs = [
WalletOutputInfo(address=new_address,
value=self.blocks_tokens[0],
timelock=None)
]
tx4 = self.manager.wallet.prepare_transaction_incomplete_inputs(
Transaction, inputs, outputs, self.manager.tx_storage)
tx4.weight = 10
tx4.parents = [tx3.hash, tx3.parents[0]]
tx4.timestamp = int(self.clock.seconds())
tx4.resolve()
self.manager.propagate_tx(tx4)
self.run_to_completion()
# Change of parents only, so it's a twin.
tx5 = Transaction.create_from_struct(tx4.get_struct())
tx5.parents = [tx4.parents[1], tx4.parents[0]]
tx5.weight = 10
tx5.resolve()
# Propagate a conflicting twin transaction
self.manager.propagate_tx(tx5)
self.run_to_completion()
meta4 = tx4.get_metadata(force_reload=True)
self.assertEqual(meta4.twins, [tx5.hash])
meta5 = tx5.get_metadata(force_reload=True)
self.assertEqual(meta5.voided_by, {tx5.hash})
# Balance is the same
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, self.initial_balance))
def render_POST(self, request):
""" POST request for /wallet/send_tokens/
We expect 'data' as request args
'data': stringified json with an array of inputs and array of outputs
If inputs array is empty we use 'prepare_compute_inputs', that calculate the inputs
We return success (bool)
:rtype: string (json)
"""
request.setHeader(b'content-type', b'application/json; charset=utf-8')
set_cors(request, 'POST')
post_data = json.loads(request.content.read().decode('utf-8'))
data = post_data['data']
outputs = []
for output in data['outputs']:
try:
address = decode_address(output['address']) # bytes
except InvalidAddress:
return self.return_POST(
False,
'The address {} is invalid'.format(output['address']))
value = int(output['value'])
timelock = output.get('timelock')
token_uid = output.get('token_uid')
if token_uid:
outputs.append(
WalletOutputInfo(address=address,
value=value,
timelock=timelock,
token_uid=token_uid))
else:
outputs.append(
WalletOutputInfo(address=address,
value=value,
timelock=timelock))
timestamp = None
if 'timestamp' in data:
if data['timestamp'] > 0:
timestamp = data['timestamp']
else:
timestamp = int(self.manager.reactor.seconds())
if len(data['inputs']) == 0:
try:
inputs, outputs = self.manager.wallet.prepare_compute_inputs(
outputs, self.manager.tx_storage, timestamp)
except InsufficientFunds as e:
return self.return_POST(
False, 'Insufficient funds, {}'.format(str(e)))
else:
inputs = []
for input_tx in data['inputs']:
input_tx['private_key'] = None
input_tx['index'] = int(input_tx['index'])
input_tx['tx_id'] = bytes.fromhex(input_tx['tx_id'])
inputs.append(WalletInputInfo(**input_tx))
try:
inputs = self.manager.wallet.prepare_incomplete_inputs(
inputs, self.manager.tx_storage)
except (PrivateKeyNotFound, InputDuplicated):
return self.return_POST(False,
'Invalid input to create transaction')
storage = self.manager.tx_storage
if timestamp is None:
max_ts_spent_tx = max(
storage.get_transaction(txin.tx_id).timestamp
for txin in inputs)
timestamp = max(max_ts_spent_tx + 1,
int(self.manager.reactor.seconds()))
parents = self.manager.get_new_tx_parents(timestamp)
values = {
'inputs': inputs,
'outputs': outputs,
'storage': storage,
'weight': data.get('weight'),
'parents': parents,
'timestamp': timestamp,
}
deferred = threads.deferToThread(self._render_POST_thread, values,
request)
deferred.addCallback(self._cb_tx_resolve, request)
deferred.addErrback(self._err_tx_resolve, request)
from twisted.web.server import NOT_DONE_YET
return NOT_DONE_YET
def test_timelock(self):
blocks = add_new_blocks(self.manager, 5, advance_clock=15)
blocks_tokens = [
sum(txout.value for txout in blk.outputs) for blk in blocks
]
add_blocks_unlock_reward(self.manager)
address = self.manager.wallet.get_unused_address()
outside_address = self.get_address(0)
outputs = [
WalletOutputInfo(address=decode_address(address),
value=500,
timelock=int(self.clock.seconds()) + 10),
WalletOutputInfo(address=decode_address(address),
value=700,
timelock=int(self.clock.seconds()) - 10),
WalletOutputInfo(address=decode_address(address),
value=sum(blocks_tokens[:2]) - 500 - 700,
timelock=None)
]
tx1 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs, self.manager.tx_storage)
tx1.weight = 10
tx1.parents = self.manager.get_new_tx_parents()
tx1.timestamp = int(self.clock.seconds())
tx1.resolve()
self.manager.propagate_tx(tx1)
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(500,
sum(blocks_tokens) - 500))
self.clock.advance(1)
outputs1 = [
WalletOutputInfo(address=decode_address(outside_address),
value=500,
timelock=None)
]
inputs1 = [WalletInputInfo(tx_id=tx1.hash, index=0, private_key=None)]
tx2 = self.manager.wallet.prepare_transaction_incomplete_inputs(
Transaction, inputs1, outputs1, self.manager.tx_storage)
tx2.weight = 10
tx2.parents = self.manager.get_new_tx_parents()
tx2.timestamp = int(self.clock.seconds())
tx2.resolve()
propagated = self.manager.propagate_tx(tx2)
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(500,
sum(blocks_tokens) - 500))
self.assertFalse(propagated)
self.clock.advance(1)
outputs2 = [
WalletOutputInfo(address=decode_address(outside_address),
value=700,
timelock=None)
]
inputs2 = [WalletInputInfo(tx_id=tx1.hash, index=1, private_key=None)]
tx3 = self.manager.wallet.prepare_transaction_incomplete_inputs(
Transaction, inputs2, outputs2, self.manager.tx_storage)
tx3.weight = 10
tx3.parents = self.manager.get_new_tx_parents()
tx3.timestamp = int(self.clock.seconds())
tx3.resolve()
propagated = self.manager.propagate_tx(tx3, False)
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(500,
sum(blocks_tokens) - 500 - 700))
self.assertTrue(propagated)
self.clock.advance(1)
outputs3 = [
WalletOutputInfo(address=decode_address(outside_address),
value=sum(blocks_tokens[:2]) - 500 - 700,
timelock=None)
]
inputs3 = [WalletInputInfo(tx_id=tx1.hash, index=2, private_key=None)]
tx4 = self.manager.wallet.prepare_transaction_incomplete_inputs(
Transaction, inputs3, outputs3, self.manager.tx_storage)
tx4.weight = 10
tx4.parents = self.manager.get_new_tx_parents()
tx4.timestamp = int(self.clock.seconds())
tx4.resolve()
propagated = self.manager.propagate_tx(tx4, False)
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(500, sum(blocks_tokens[:3])))
self.assertTrue(propagated)
self.clock.advance(8)
tx2.timestamp = int(self.clock.seconds())
tx2.resolve()
propagated = self.manager.propagate_tx(tx2, False)
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, sum(blocks_tokens[:3])))
self.assertTrue(propagated)
def test_wallet_create_transaction(self):
genesis_private_key_bytes = get_private_key_bytes(
self.genesis_private_key,
encryption_algorithm=serialization.BestAvailableEncryption(
PASSWORD))
genesis_address = get_address_b58_from_public_key(
self.genesis_public_key)
# create wallet with genesis block key
key_pair = KeyPair(private_key_bytes=genesis_private_key_bytes,
address=genesis_address,
used=True)
keys = {}
keys[key_pair.address] = key_pair
w = Wallet(keys=keys, directory=self.directory)
w.unlock(PASSWORD)
genesis_blocks = [
tx for tx in get_genesis_transactions(None) if tx.is_block
]
genesis_block = genesis_blocks[0]
genesis_value = sum([output.value for output in genesis_block.outputs])
# wallet will receive genesis block and store in unspent_tx
w.on_new_tx(genesis_block)
for index in range(len(genesis_block.outputs)):
utxo = w.unspent_txs[settings.HATHOR_TOKEN_UID].get(
(genesis_block.hash, index))
self.assertIsNotNone(utxo)
self.assertEqual(w.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, genesis_value))
# create transaction spending this value, but sending to same wallet
new_address = w.get_unused_address()
out = WalletOutputInfo(decode_address(new_address), 100, timelock=None)
tx1 = w.prepare_transaction_compute_inputs(Transaction, outputs=[out])
tx1.storage = self.storage
tx1.update_hash()
self.storage.save_transaction(tx1)
w.on_new_tx(tx1)
self.assertEqual(len(w.spent_txs), 1)
self.assertEqual(w.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, genesis_value))
# pass inputs and outputs to prepare_transaction, but not the input keys
# spend output last transaction
input_info = WalletInputInfo(tx1.hash, 1, None)
new_address = w.get_unused_address()
key2 = w.keys[new_address]
out = WalletOutputInfo(decode_address(key2.address),
100,
timelock=None)
tx2 = w.prepare_transaction_incomplete_inputs(Transaction,
inputs=[input_info],
outputs=[out],
tx_storage=self.storage)
tx2.storage = self.storage
tx2.update_hash()
self.storage.save_transaction(tx2)
w.on_new_tx(tx2)
self.assertEqual(len(w.spent_txs), 2)
self.assertEqual(w.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, genesis_value))
# test keypair exception
with self.assertRaises(WalletLocked):
key_pair.get_private_key(None)
def test_tx_tips_voided(self):
from hathor.wallet.base_wallet import WalletOutputInfo
add_new_blocks(self.manager, 5, advance_clock=15)
add_blocks_unlock_reward(self.manager)
address1 = self.get_address(0)
address2 = self.get_address(1)
address3 = self.get_address(2)
output1 = WalletOutputInfo(address=decode_address(address1),
value=123,
timelock=None)
output2 = WalletOutputInfo(address=decode_address(address2),
value=234,
timelock=None)
output3 = WalletOutputInfo(address=decode_address(address3),
value=345,
timelock=None)
outputs = [output1, output2, output3]
tx1 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs, self.manager.tx_storage)
tx1.weight = 2.0
tx1.parents = self.manager.get_new_tx_parents()
tx1.timestamp = int(self.clock.seconds())
tx1.resolve()
self.assertTrue(self.manager.propagate_tx(tx1, False))
self.assertEqual(
{
tx.hash
for tx in self.manager.tx_storage.indexes.mempool_tips.iter(
self.manager.tx_storage)
}, {tx1.hash})
tx2 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs, self.manager.tx_storage)
tx2.weight = 2.0
tx2.parents = [tx1.hash] + self.manager.get_new_tx_parents()[1:]
self.assertIn(tx1.hash, tx2.parents)
tx2.timestamp = int(self.clock.seconds()) + 1
tx2.resolve()
self.assertTrue(self.manager.propagate_tx(tx2, False))
self.assertEqual(
{
tx.hash
for tx in self.manager.tx_storage.indexes.mempool_tips.iter(
self.manager.tx_storage)
}, {tx2.hash})
tx3 = Transaction.create_from_struct(tx2.get_struct())
tx3.weight = 3.0
# tx3.timestamp = tx2.timestamp + 1
tx3.parents = tx1.parents
# self.assertIn(tx1.hash, tx3.parents)
tx3.resolve()
self.assertNotEqual(tx2.hash, tx3.hash)
self.assertTrue(self.manager.propagate_tx(tx3, False))
# self.assertIn(tx3.hash, tx2.get_metadata().voided_by)
self.assertIn(tx3.hash, tx2.get_metadata().conflict_with)
self.assertEqual(
{
tx.hash
for tx in self.manager.tx_storage.indexes.mempool_tips.iter(
self.manager.tx_storage)
},
# XXX: what should we expect here? I don't think we should exclude both tx2 and tx3, but maybe let the
# function using the index decide
{tx1.hash, tx3.hash})
def test_spending_voided(self) -> Generator:
self.manager.wallet.unlock(b'MYPASS')
add_new_blocks(self.manager, 5, advance_clock=15)
add_blocks_unlock_reward(self.manager)
# Push a first tx
tx = self.get_tx()
tx_hex = tx.get_struct().hex()
response = yield self.push_tx({'hex_tx': tx_hex})
data = response.json_value()
self.assertTrue(data['success'])
wallet = self.manager.wallet
# Pushing a tx that spends this first tx works
txout = tx.outputs[0]
p2pkh = parse_address_script(txout.script)
assert p2pkh is not None
private_key = wallet.get_private_key(p2pkh.address)
assert tx.hash is not None
inputs = [
WalletInputInfo(tx_id=tx.hash, index=0, private_key=private_key)
]
outputs = [
WalletOutputInfo(address=decode_address(p2pkh.address),
value=txout.value,
timelock=None),
]
tx2 = self.get_tx(inputs, outputs)
tx2_hex = tx2.get_struct().hex()
response = yield self.push_tx({'hex_tx': tx2_hex})
data = response.json_value()
self.assertTrue(data['success'])
# Now we set this tx2 as voided and try to push a tx3 that spends tx2
tx_meta = tx2.get_metadata()
assert tx2.hash is not None
tx_meta.voided_by = {tx2.hash}
self.manager.tx_storage.save_transaction(tx2, only_metadata=True)
inputs = [
WalletInputInfo(tx_id=tx2.hash, index=0, private_key=private_key)
]
outputs = [
WalletOutputInfo(address=decode_address(p2pkh.address),
value=txout.value,
timelock=None),
]
tx3 = self.get_tx(inputs, outputs)
tx3_hex = tx3.get_struct().hex()
response = yield self.push_tx({'hex_tx': tx3_hex})
data = response.json_value()
self.assertFalse(data['success'])
# Now we set this tx2 as voided and try to push a tx3 that spends tx2
tx_meta = tx2.get_metadata()
tx_meta.voided_by = {settings.SOFT_VOIDED_ID}
self.manager.tx_storage.save_transaction(tx2, only_metadata=True)
# Try to push again with soft voided id as voided by
response = yield self.push_tx({'hex_tx': tx3_hex})
data = response.json_value()
self.assertFalse(data['success'])
# Now without voided_by the push tx must succeed
tx_meta = tx2.get_metadata()
tx_meta.voided_by = None
self.manager.tx_storage.save_transaction(tx2, only_metadata=True)
response = yield self.push_tx({'hex_tx': tx3_hex})
data = response.json_value()
self.assertTrue(data['success'])
def test_spend_multisig(self):
# Adding funds to the wallet
blocks = add_new_blocks(self.manager, 2, advance_clock=15)
add_blocks_unlock_reward(self.manager)
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, sum(blk.outputs[0].value for blk in blocks)))
first_block_amount = blocks[0].outputs[0].value
# First we send tokens to a multisig address
outputs = [
WalletOutputInfo(address=self.multisig_address,
value=first_block_amount,
timelock=int(self.clock.seconds()) + 15)
]
tx1 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs)
tx1.weight = 10
tx1.parents = self.manager.get_new_tx_parents()
tx1.timestamp = int(self.clock.seconds())
tx1.resolve()
self.manager.propagate_tx(tx1)
self.clock.advance(10)
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, first_block_amount))
# Then we create a new tx that spends this tokens from multisig wallet
tx = Transaction.create_from_struct(tx1.get_struct())
tx.weight = 10
tx.parents = self.manager.get_new_tx_parents()
tx.timestamp = int(self.clock.seconds())
multisig_script = create_output_script(self.multisig_address)
multisig_output = TxOutput(200, multisig_script)
wallet_output = TxOutput(300, create_output_script(self.address))
outside_output = TxOutput(first_block_amount - 200 - 300,
create_output_script(self.outside_address))
tx.outputs = [multisig_output, wallet_output, outside_output]
tx_input = TxInput(tx1.hash, 0, b'')
tx.inputs = [tx_input]
signatures = []
for private_key_hex in self.private_keys:
signature = generate_signature(tx,
bytes.fromhex(private_key_hex),
password=b'1234')
signatures.append(signature)
input_data = MultiSig.create_input_data(self.redeem_script, signatures)
tx.inputs[0].data = input_data
tx.resolve()
# Transaction is still locked
self.assertFalse(self.manager.propagate_tx(tx))
self.clock.advance(6)
tx.timestamp = int(self.clock.seconds())
tx.resolve()
# First we try to propagate with a P2PKH input
private_key_obj = get_private_key_from_bytes(bytes.fromhex(
self.private_keys[0]),
password=b'1234')
pubkey_obj = private_key_obj.public_key()
public_key_compressed = get_public_key_bytes_compressed(pubkey_obj)
p2pkh_input_data = P2PKH.create_input_data(public_key_compressed,
signatures[0])
tx2 = Transaction.create_from_struct(tx.get_struct())
tx2.inputs[0].data = p2pkh_input_data
tx2.resolve()
self.assertFalse(self.manager.propagate_tx(tx2))
# Now we propagate the correct
self.assertTrue(self.manager.propagate_tx(tx))
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID],
WalletBalance(0, first_block_amount + 300))
# Testing the MultiSig class methods
cls_script = parse_address_script(multisig_script)
self.assertTrue(isinstance(cls_script, MultiSig))
self.assertEqual(cls_script.address, self.multisig_address_b58)
expected_dict = {
'type': 'MultiSig',
'address': self.multisig_address_b58,
'timelock': None
}
self.assertEqual(cls_script.to_human_readable(), expected_dict)
script_eval(tx, tx_input, tx1)
# Script error
with self.assertRaises(ScriptError):
create_output_script(
base58.b58decode('55d14K5jMqsN2uwUEFqiPG5SoD7Vr1BfnH'))
def test_spend_multisig(self):
# Adding funds to the wallet
# XXX: note further down the test, 20.00 HTR will be used, block_count must yield at least that amount
block_count = 3 # 3 * 8.00 -> 24.00 HTR is enough
blocks = add_new_blocks(self.manager, block_count, advance_clock=15)
add_blocks_unlock_reward(self.manager)
blocks_tokens = [sum(txout.value for txout in blk.outputs) for blk in blocks]
available_tokens = sum(blocks_tokens)
self.assertEqual(self.manager.wallet.balance[settings.HATHOR_TOKEN_UID], WalletBalance(0, available_tokens))
# First we send tokens to a multisig address
block_reward = blocks_tokens[0]
outputs = [WalletOutputInfo(address=self.multisig_address, value=block_reward, timelock=None)]
tx1 = self.manager.wallet.prepare_transaction_compute_inputs(Transaction, outputs, self.manager.tx_storage)
tx1.weight = 10
tx1.parents = self.manager.get_new_tx_parents()
tx1.timestamp = int(self.clock.seconds())
tx1.resolve()
self.manager.propagate_tx(tx1)
self.clock.advance(10)
wallet_balance = WalletBalance(0, available_tokens - block_reward)
self.assertEqual(self.manager.wallet.balance[settings.HATHOR_TOKEN_UID], wallet_balance)
# Then we create a new tx that spends this tokens from multisig wallet
tx = Transaction.create_from_struct(tx1.get_struct())
tx.weight = 10
tx.parents = self.manager.get_new_tx_parents()
tx.timestamp = int(self.clock.seconds())
multisig_script = create_output_script(self.multisig_address)
multisig_output = TxOutput(200, multisig_script)
wallet_output = TxOutput(300, create_output_script(self.address))
outside_output = TxOutput(block_reward - 200 - 300, create_output_script(self.outside_address))
tx.outputs = [multisig_output, wallet_output, outside_output]
tx_input = TxInput(tx1.hash, 0, b'')
tx.inputs = [tx_input]
signatures = []
for private_key_hex in self.private_keys:
signature = generate_signature(tx, bytes.fromhex(private_key_hex), password=b'1234')
signatures.append(signature)
parser = create_parser()
# Generate spend tx
args = parser.parse_args([
tx.get_struct().hex(), '{},{}'.format(signatures[0].hex(), signatures[1].hex()),
self.redeem_script.hex()
])
f = StringIO()
with capture_logs():
with redirect_stdout(f):
execute(args)
# Transforming prints str in array
output = f.getvalue().strip().splitlines()
tx_raw = output[0].split(':')[1].strip()
tx = Transaction.create_from_struct(bytes.fromhex(tx_raw))
self.assertTrue(self.manager.propagate_tx(tx, False))
def test_twin_tx(self):
add_new_blocks(self.manager, 5, advance_clock=15)
add_blocks_unlock_reward(self.manager)
address = self.get_address(0)
value1 = 100
value2 = 101
value3 = 102
outputs = [
WalletOutputInfo(address=decode_address(address),
value=int(value1),
timelock=None),
WalletOutputInfo(address=decode_address(address),
value=int(value2),
timelock=None)
]
outputs2 = [
WalletOutputInfo(address=decode_address(address),
value=int(value1),
timelock=None),
WalletOutputInfo(address=decode_address(address),
value=int(value3),
timelock=None)
]
tx1 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs)
tx1.weight = 10
tx1.parents = self.manager.get_new_tx_parents()
tx1.timestamp = int(self.clock.seconds())
tx1.resolve()
# Change of parents only, so it's a twin
tx2 = Transaction.create_from_struct(tx1.get_struct())
tx2.parents = [tx1.parents[1], tx1.parents[0]]
tx2.resolve()
self.assertNotEqual(tx1.hash, tx2.hash)
# The same as tx1 but with one input different, so it's not a twin
tx3 = self.manager.wallet.prepare_transaction_compute_inputs(
Transaction, outputs2)
tx3.inputs = tx1.inputs
tx3.weight = tx1.weight
tx3.parents = tx1.parents
tx3.timestamp = tx1.timestamp
tx3.resolve()
self.manager.propagate_tx(tx1)
meta1 = tx1.get_metadata()
self.assertEqual(meta1.conflict_with, None)
self.assertEqual(meta1.voided_by, None)
self.assertEqual(meta1.twins, [])
# Propagate a conflicting twin transaction
self.manager.propagate_tx(tx2)
meta1 = tx1.get_metadata(force_reload=True)
self.assertEqual(meta1.conflict_with, [tx2.hash])
self.assertEqual(meta1.voided_by, {tx1.hash})
self.assertEqual(meta1.twins, [tx2.hash])
meta2 = tx2.get_metadata()
self.assertEqual(meta2.conflict_with, [tx1.hash])
self.assertEqual(meta2.voided_by, {tx2.hash})
self.assertEqual(meta2.twins, [tx1.hash])
# Propagate another conflicting transaction but it's not a twin
self.manager.propagate_tx(tx3)
meta1 = tx1.get_metadata()
self.assertEqual(meta1.twins, [tx2.hash])
meta3 = tx3.get_metadata()
self.assertEqual(meta3.twins, [])
self.assertConsensusValid(self.manager)