def test_get_transaction_from_block_uint256(self):
call_flags = Integer(CallFlags.ALL).to_byte_array(signed=True, min_length=1)
method = String('getTransactionFromBlock').to_bytes()
expected_output = (
Opcode.INITSLOT
+ b'\x00\x02'
+ Opcode.LDARG1
+ Opcode.LDARG0
+ Opcode.PUSH2
+ Opcode.PACK
+ Opcode.PUSHDATA1
+ Integer(len(call_flags)).to_byte_array()
+ call_flags
+ Opcode.PUSHDATA1
+ Integer(len(method)).to_byte_array()
+ method
+ Opcode.PUSHDATA1
+ Integer(len(constants.LEDGER_SCRIPT)).to_byte_array()
+ constants.LEDGER_SCRIPT
+ Opcode.SYSCALL
+ Interop.CallContract.interop_method_hash
+ Opcode.RET
)
path = self.get_contract_path('GetTransactionFromBlockUInt256.py')
output = Boa3.compile(path)
self.assertEqual(expected_output, output)
path_burn_gas = self.get_contract_path('../runtime', 'BurnGas.py')
engine = TestEngine()
engine.increase_block(10)
sender = bytes(range(20))
self.run_smart_contract(engine, path_burn_gas, 'main', 100, signer_accounts=[sender])
block_10 = engine.current_block
block_hash = block_10.hash
self.assertIsNotNone(block_hash)
txs = block_10.get_transactions()
tx_hash = txs[0].hash
tx_script = txs[0]._script
engine.increase_block()
result = self.run_smart_contract(engine, path, 'main', block_hash, 0)
self.assertEqual(8, len(result))
if isinstance(result[0], str):
result[0] = String(result[0]).to_bytes()
self.assertEqual(UInt256(tx_hash), UInt256(result[0])) # hash
self.assertIsInstance(result[1], int) # version
self.assertIsInstance(result[2], int) # nonce
if isinstance(result[3], str):
result[3] = String(result[3]).to_bytes()
self.assertEqual(UInt160(sender), UInt160(result[3])) # sender
self.assertIsInstance(result[4], int) # system_fee
self.assertIsInstance(result[5], int) # network_fee
self.assertIsInstance(result[6], int) # valid_until_block
if isinstance(result[7], str):
result[7] = String(result[7]).to_bytes()
self.assertEqual(tx_script, result[7]) # script
def from_json(cls, json: Dict[str, Any]) -> Transaction:
script = base64.b64decode(json['script'])
tx = cls(script)
if 'signers' in json:
signers_json = json['signers']
if not isinstance(signers_json, list):
signers_json = [signers_json]
tx._signers = [Signer.from_json(js) for js in signers_json]
if 'witnesses' in json:
witnesses_json = json['witnesses']
if not isinstance(witnesses_json, list):
witnesses_json = [witnesses_json]
tx._witnesses = [Witness.from_json(js) for js in witnesses_json]
if 'attributes' in json:
attributes_json = json['attributes']
if not isinstance(attributes_json, list):
attributes_json = [attributes_json]
tx._attributes = [
tx_attribute.TransactionAttribute.from_json(js)
for js in attributes_json
]
if 'hash' in json and isinstance(json['hash'], str):
tx._hash = UInt256(from_hex_str(json['hash']))
return tx
def evaluate_literal(self, *args: Any) -> Any:
from boa3.neo3.core.types import UInt256
if len(args) == 0:
return UInt256.zero().to_array()
if len(args) == 1:
arg = args[0]
if isinstance(arg, int):
from boa3.neo.vm.type.Integer import Integer
arg = Integer(arg).to_byte_array(min_length=UInt256._BYTE_LEN)
if isinstance(arg, bytes):
value = UInt256(arg).to_array()
return value
return super().evaluate_literal(*args)
def _internal_transaction_get(self, hash: types.UInt256):
tx_bytes = self._real_db.get(DBPrefixes.TRANSACTIONS + hash.to_array())
if tx_bytes is None:
# this is a must if not found!
raise KeyError
with serialization.BinaryReader(tx_bytes) as br:
tx = payloads.Transaction()
tx.deserialize_special(br)
return tx
def test_transaction_init(self):
path = self.get_contract_path('Transaction.py')
engine = TestEngine()
result = self.run_smart_contract(engine, path, 'main')
self.assertEqual(8, len(result))
if isinstance(result[0], str):
result[0] = String(result[0]).to_bytes()
self.assertEqual(UInt256(), UInt256(result[0])) # hash
self.assertEqual(0, result[1]) # version
self.assertEqual(0, result[2]) # nonce
if isinstance(result[3], str):
result[3] = String(result[3]).to_bytes()
self.assertEqual(UInt160(), UInt160(result[3])) # sender
self.assertEqual(0, result[4]) # system_fee
self.assertEqual(0, result[5]) # network_fee
self.assertEqual(0, result[6]) # valid_until_block
if isinstance(result[7], str):
result[7] = String(result[7]).to_bytes()
self.assertEqual(b'', result[7]) # script
def from_json(cls, json: Dict[str, Any]) -> Block:
# 'index' and 'timestamp' fields are required
block = cls(int(json['index']))
block._timestamp = int(json['timestamp'])
if 'transactions' in json:
tx_json = json['transactions']
if not isinstance(tx_json, list):
tx_json = [tx_json]
block._transactions = [Transaction.from_json(js) for js in tx_json]
if 'hash' in json and isinstance(json['hash'], str):
block._hash = UInt256(from_hex_str(json['hash']))
return block
def _internal_block_delete(self, hash: types.UInt256, batch=None):
if batch:
db = batch
else:
db = self._real_db
block_hash_bytes = hash.to_array()
block_bytes = self._real_db.get(DBPrefixes.BLOCKS + block_hash_bytes)
if block_bytes is not None:
# Instead of full block deserialization, which includes merkletree calculation and such, we manually extract
# the 4 bytes block.index from the stream.
start_idx = 4 + 32 + 32 + 8
block_height_bytes = block_bytes[start_idx:start_idx + 4]
db.delete(DBPrefixes.BLOCKS + block_hash_bytes)
db.delete(DBPrefixes.BLOCKS_HEIGHT_MAP + block_height_bytes)
def test_block_constructor(self):
path = self.get_contract_path('Block.py')
engine = TestEngine()
result = self.run_smart_contract(engine, path, 'main')
self.assertIsInstance(result, list)
self.assertEqual(10, len(result))
for k in range(len(result)):
if isinstance(result[k], str):
result[k] = String(result[k]).to_bytes()
self.assertEqual(UInt256(), UInt256(result[0])) # hash
self.assertEqual(0, result[1]) # version
self.assertEqual(UInt256(), UInt256(result[2])) # previous_hash
self.assertEqual(UInt256(), UInt256(result[3])) # merkle_root
self.assertEqual(0, result[4]) # timestamp
self.assertEqual(0, result[5]) # nonce
self.assertEqual(0, result[6]) # index
self.assertEqual(0, result[7]) # primary_index
self.assertEqual(UInt160(), UInt160(result[8])) # next_consensus
self.assertEqual(0, result[9]) # transaction_count
def _internal_block_get(self, hash: types.UInt256):
block_bytes = self._real_db.get(DBPrefixes.BLOCKS + hash.to_array())
if block_bytes is None:
raise KeyError
return payloads.Block.deserialize_from_bytes(block_bytes)
def _internal_transaction_delete(self, hash: types.UInt256, batch=None):
if batch:
db = batch
else:
db = self._real_db
db.delete(DBPrefixes.TRANSACTIONS + hash.to_array())