def verify_weight(self) -> None:
"""Validate minimum tx difficulty."""
min_tx_weight = daa.minimum_tx_weight(self)
if self.weight < min_tx_weight - settings.WEIGHT_TOL:
raise InvalidNewTransaction(
f'Invalid new tx {self.hash_hex}: weight ({self.weight}) is '
f'smaller than the minimum weight ({min_tx_weight})')
def test_genesis_weight(self):
genesis = self.storage.get_all_genesis()
genesis_blocks = [tx for tx in genesis if tx.is_block]
genesis_block = genesis_blocks[0]
genesis_txs = [tx for tx in genesis if not tx.is_block]
genesis_tx = genesis_txs[0]
# Validate the block and tx weight
# in test mode weight is always 1
_set_test_mode(TestMode.TEST_ALL_WEIGHT)
self.assertEqual(calculate_block_difficulty(genesis_block), 1)
self.assertEqual(minimum_tx_weight(genesis_tx), 1)
_set_test_mode(TestMode.DISABLED)
self.assertEqual(calculate_block_difficulty(genesis_block), genesis_block.weight)
self.assertEqual(minimum_tx_weight(genesis_tx), genesis_tx.weight)
def new_tx_step1(self):
""" Generate a new transaction and schedule the mining part of the transaction.
"""
balance = self.manager.wallet.balance[settings.HATHOR_TOKEN_UID]
if balance.available == 0 and self.ignore_no_funds:
self.delayedcall = self.clock.callLater(
0, self.schedule_next_transaction)
return
if not self.send_to:
address = self.manager.wallet.get_unused_address(
mark_as_used=False)
else:
address = self.rng.choice(self.send_to)
value = self.rng.randint(1, balance.available)
self.log.debug('randomized step: send to',
address=address,
amount=value / 100)
if not self.double_spending_only:
try:
tx = gen_new_tx(self.manager, address, value)
except (InsufficientFunds, RewardLocked):
self.delayedcall = self.clock.callLater(
0, self.schedule_next_transaction)
return
else:
try:
tx = gen_new_double_spending(self.manager)
tx.nonce = self.rng.getrandbits(32)
except NoCandidatesError:
self.delayedcall = self.clock.callLater(
0, self.schedule_next_transaction)
return
tx.weight = daa.minimum_tx_weight(tx)
tx.update_hash()
geometric_p = 2**(-tx.weight)
trials = self.rng.geometric(geometric_p)
dt = 1.0 * trials / self.hashpower
self.tx = tx
self.delayedcall = self.clock.callLater(dt,
self.schedule_next_transaction)
self.log.debug('randomized step: schedule next transaction',
dt=dt,
hash=tx.hash_hex)
def render_POST(self, request):
""" Post request /create_tx/ that returns an encoded tx, if valid
Expects {"inputs":[{"tx_id": <hex encoded>, "index": <int>, "data": <optional base64 encoded>}],
"outputs":[{"value": <int, 1.00 HTR = 100>, "token_uid": <optional omit for HTR, hex encoded>,
"address" or "script"}]} as POST data
"""
request.setHeader(b'content-type', b'application/json; charset=utf-8')
set_cors(request, 'POST')
body_content = json_loadb(request.content.read())
raw_inputs = body_content.get('inputs', [])
raw_outputs = body_content.get('outputs', [])
inputs = [TxInput.create_from_dict(i) for i in raw_inputs]
tokens = []
outputs = [from_raw_output(i, tokens) for i in raw_outputs]
timestamp = int(max(self.manager.tx_storage.latest_timestamp, self.manager.reactor.seconds()))
parents = self.manager.get_new_tx_parents(timestamp)
# this tx will have to be mined by tx-mining-server or equivalent
tx = Transaction(
timestamp=timestamp,
inputs=inputs,
outputs=outputs,
parents=parents,
storage=self.manager.tx_storage,
)
fake_signed_tx = tx.clone()
for tx_input in fake_signed_tx.inputs:
# conservative estimate of the input data size to estimate a valid weight
tx_input.data = b'\0' * 107
tx.weight = minimum_tx_weight(fake_signed_tx)
tx.verify_unsigned_skip_pow()
if tx.is_double_spending():
raise InvalidNewTransaction('At least one of your inputs has already been spent.')
hex_data = bytes(tx).hex()
data = tx.to_json()
data.pop('hash', None)
data.pop('nonce', None)
return json_dumpb({
'success': True,
'hex_data': hex_data,
'data': data,
})
def _render_POST_thread(self, values: Dict[str, Any],
request: Request) -> Union[bytes, Transaction]:
tx = self.manager.wallet.prepare_transaction(Transaction,
values['inputs'],
values['outputs'],
values['timestamp'])
tx.storage = values['storage']
tx.parents = values['parents']
weight = values['weight']
if weight is None:
weight = minimum_tx_weight(tx)
tx.weight = weight
tx.resolve()
tx.verify()
return tx
def render_GET(self, request):
""" Get request /decode_tx/ that returns the signed tx, if success
Expects 'hex_tx' as GET parameter
:rtype: string (json)
"""
request.setHeader(b'content-type', b'application/json; charset=utf-8')
set_cors(request, 'GET')
if b'hex_tx' in request.args:
requested_decode = request.args[b'hex_tx'][0].decode('utf-8')
else:
return get_missing_params_msg('hex_tx')
pattern = r'[a-fA-F\d]+'
if re.match(pattern, requested_decode) and len(requested_decode) % 2 == 0:
tx_bytes = bytes.fromhex(requested_decode)
prepare_to_send = False
if b'prepare_to_send' in request.args:
_prepare_to_send = request.args[b'prepare_to_send'][0].decode('utf-8')
prepare_to_send = _prepare_to_send == 'true'
try:
tx = Transaction.create_from_struct(tx_bytes)
tx.storage = self.manager.tx_storage
self.manager.wallet.sign_transaction(tx, self.manager.tx_storage)
if prepare_to_send:
tx.parents = self.manager.get_new_tx_parents()
tx.update_timestamp(int(self.manager.reactor.seconds()))
tx.weight = minimum_tx_weight(tx)
tx.resolve()
data = {'hex_tx': tx.get_struct().hex(), 'success': True}
except struct.error:
data = {'success': False, 'message': 'Transaction invalid'}
else:
data = {'success': False, 'message': 'Transaction invalid'}
return json.dumps(data).encode('utf-8')
def test_post(self):
# Unlocking wallet
self.manager.wallet.unlock(b'MYPASS')
blocks = add_new_blocks(self.manager, 3, advance_clock=1)
add_blocks_unlock_reward(self.manager)
blocks_tokens = [
sum(txout.value for txout in blk.outputs) for blk in blocks
]
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID].available,
sum(blocks_tokens))
# Options
yield self.web.options('thin_wallet/send_tokens')
tx_id = blocks[0].hash
output = blocks[0].outputs[0]
script_type_out = parse_address_script(output.script)
address = script_type_out.address
private_key = self.manager.wallet.get_private_key(address)
output_address = decode_address(self.get_address(0))
value = blocks_tokens[0]
o = TxOutput(value, create_output_script(output_address, None))
o_invalid_amount = TxOutput(value - 1,
create_output_script(output_address, None))
i = TxInput(tx_id, 0, b'')
# wrong weight
tx = Transaction(inputs=[i], outputs=[o])
data_to_sign = tx.get_sighash_all()
public_key_bytes, signature_bytes = self.manager.wallet.get_input_aux_data(
data_to_sign, private_key)
i.data = P2PKH.create_input_data(public_key_bytes, signature_bytes)
tx.inputs = [i]
tx.timestamp = int(self.clock.seconds())
tx.weight = 0
response = yield self.web.post('thin_wallet/send_tokens',
{'tx_hex': tx.get_struct().hex()})
data = response.json_value()
self.assertFalse(data['success'])
# Error wrong amount
tx2 = Transaction(inputs=[i], outputs=[o_invalid_amount])
data_to_sign = tx2.get_sighash_all()
public_key_bytes, signature_bytes = self.manager.wallet.get_input_aux_data(
data_to_sign, private_key)
i.data = P2PKH.create_input_data(public_key_bytes, signature_bytes)
tx2.inputs = [i]
tx2.timestamp = int(self.clock.seconds())
tx2.weight = minimum_tx_weight(tx2)
response_wrong_amount = yield self.web.post(
'thin_wallet/send_tokens', {'tx_hex': tx2.get_struct().hex()})
data_wrong_amount = response_wrong_amount.json_value()
self.assertFalse(data_wrong_amount['success'])
# successful tx
tx3 = Transaction(inputs=[i], outputs=[o])
data_to_sign = tx3.get_sighash_all()
public_key_bytes, signature_bytes = self.manager.wallet.get_input_aux_data(
data_to_sign, private_key)
i.data = P2PKH.create_input_data(public_key_bytes, signature_bytes)
tx3.inputs = [i]
tx3.timestamp = int(self.clock.seconds())
tx3.weight = minimum_tx_weight(tx3)
# Then send tokens
response = yield self.web.post('thin_wallet/send_tokens',
{'tx_hex': tx3.get_struct().hex()})
data = response.json_value()
self.assertTrue(data['success'])
# Trying to send a double spending will not have success
self.clock.advance(5)
tx3.timestamp = int(self.clock.seconds())
response = yield self.web.post('thin_wallet/send_tokens',
{'tx_hex': tx3.get_struct().hex()})
data_error = response.json_value()
self.assertFalse(data_error['success'])
self.clock.advance(5)
# Check if tokens were really sent
self.assertEqual(
self.manager.wallet.balance[settings.HATHOR_TOKEN_UID].available,
sum(blocks_tokens[:-1]))
response_history = yield self.web_address_history.get(
'thin_wallet/address_history', {
b'addresses[]': address.encode(),
})
response_data = response_history.json_value()['history']
self.assertIn(data['tx']['hash'], [x['tx_id'] for x in response_data])
# Create token tx
tx4 = create_tokens(self.manager,
address,
mint_amount=100,
propagate=False)
tx4.nonce = 0
tx4.timestamp = int(self.clock.seconds())
response = yield self.web.post('thin_wallet/send_tokens',
{'tx_hex': tx4.get_struct().hex()})
data = response.json_value()
self.assertTrue(data['success'])
def test_token_history(self):
self.manager.wallet.unlock(b'MYPASS')
resource = StubSite(TokenHistoryResource(self.manager))
add_new_blocks(self.manager, 1, advance_clock=1)
add_blocks_unlock_reward(self.manager)
tx = create_tokens(self.manager,
mint_amount=100,
token_name='Teste',
token_symbol='TST')
token_uid = tx.tokens[0]
response = yield resource.get('thin_wallet/token_history', {
b'id': token_uid.hex().encode(),
b'count': b'3'
})
data = response.json_value()
# Success returning the token creation tx
self.assertTrue(data['success'])
self.assertFalse(data['has_more'])
self.assertEqual(1, len(data['transactions']))
self.assertEqual(tx.hash.hex(), data['transactions'][0]['tx_id'])
response = yield resource.get('thin_wallet/token_history', {
b'id': b'123',
b'count': b'3'
})
data = response.json_value()
# Fail because token is unknown
self.assertFalse(data['success'])
# Create a tx with this token, so we can have more tx in the history
output = tx.outputs[0]
script_type_out = parse_address_script(output.script)
address = script_type_out.address
private_key = self.manager.wallet.get_private_key(address)
output_address = decode_address(self.get_address(0))
o = TxOutput(100, create_output_script(output_address, None), 1)
i = TxInput(tx.hash, 0, b'')
tx2 = Transaction(inputs=[i], outputs=[o], tokens=[token_uid])
data_to_sign = tx2.get_sighash_all()
public_key_bytes, signature_bytes = self.manager.wallet.get_input_aux_data(
data_to_sign, private_key)
i.data = P2PKH.create_input_data(public_key_bytes, signature_bytes)
tx2.inputs = [i]
tx2.timestamp = int(self.clock.seconds())
tx2.weight = minimum_tx_weight(tx2)
tx2.parents = self.manager.get_new_tx_parents()
tx2.resolve()
self.manager.propagate_tx(tx2)
# Now we have 2 txs with this token
response = yield resource.get('thin_wallet/token_history', {
b'id': token_uid.hex().encode(),
b'count': b'3'
})
data = response.json_value()
# Success returning the token creation tx and newly created tx
self.assertTrue(data['success'])
self.assertFalse(data['has_more'])
self.assertEqual(2, len(data['transactions']))
self.assertEqual(tx2.hash.hex(), data['transactions'][0]['tx_id'])
self.assertEqual(tx.hash.hex(), data['transactions'][1]['tx_id'])
response = yield resource.get('thin_wallet/token_history', {
b'id': token_uid.hex().encode(),
b'count': b'1'
})
data = response.json_value()
# Testing has_more
self.assertTrue(data['success'])
self.assertTrue(data['has_more'])
self.assertEqual(1, len(data['transactions']))
response = yield resource.get(
'thin_wallet/token_history', {
b'id': token_uid.hex().encode(),
b'count': b'10',
b'page': b'next',
b'hash': tx2.hash.hex().encode(),
b'timestamp': str(tx2.timestamp).encode(),
})
data = response.json_value()
# Testing next
self.assertTrue(data['success'])
self.assertFalse(data['has_more'])
self.assertEqual(1, len(data['transactions']))
self.assertEqual(tx.hash.hex(), data['transactions'][0]['tx_id'])
response = yield resource.get(
'thin_wallet/token_history', {
b'id': token_uid.hex().encode(),
b'count': b'10',
b'page': b'previous',
b'hash': tx.hash.hex().encode(),
b'timestamp': str(tx.timestamp).encode(),
})
data = response.json_value()
# Testing previous
self.assertTrue(data['success'])
self.assertFalse(data['has_more'])
self.assertEqual(1, len(data['transactions']))
self.assertEqual(tx2.hash.hex(), data['transactions'][0]['tx_id'])
response = yield resource.get(
'thin_wallet/token_history', {
b'id': token_uid.hex().encode(),
b'count': b'10',
b'page': b'previous',
b'hash': tx2.hash.hex().encode(),
b'timestamp': str(tx2.timestamp).encode(),
})
data = response.json_value()
# Testing previous from first
self.assertTrue(data['success'])
self.assertFalse(data['has_more'])
self.assertEqual(0, len(data['transactions']))