def newFilter(self, filter_dict):
if not isinstance(filter_dict, dict):
raise BadRequestError('Filter must be an object')
b0 = self.json_rpc_server.get_block(
block_id_decoder(filter_dict.get('fromBlock', 'latest')))
b1 = self.json_rpc_server.get_block(
block_id_decoder(filter_dict.get('toBlock', 'latest')))
if b1.number < b0.number:
raise BadRequestError('fromBlock must be prior or equal to toBlock')
address = filter_dict.get('address', None)
if is_string(address):
addresses = [address_decoder(address)]
elif isinstance(address, Iterable):
addresses = [address_decoder(addr) for addr in address]
elif address is None:
addresses = None
else:
raise JSONRPCInvalidParamsError('Parameter must be address or list of addresses')
if 'topics' in filter_dict:
topics = []
for topic in filter_dict['topics']:
if topic is not None:
topics.append(big_endian_to_int(data_decoder(topic)))
else:
topics.append(None)
else:
topics = None
blocks = [b1]
while blocks[-1] != b0:
blocks.append(blocks[-1].get_parent())
filter_ = Filter(self.chain.chain, reversed(blocks), addresses, topics)
self.filters[self.next_id] = filter_
self.next_id += 1
return self.next_id - 1
def get_block(self, block_id=None):
"""Return the block identified by `block_id`.
This method also sets :attr:`default_block` to the value of `block_id`
which will be returned if, at later calls, `block_id` is not provided.
Subdispatchers using this function have to ensure sure that a
chainmanager is registered via :attr:`required_services`.
:param block_id: either the block number as integer or 'pending',
'earliest' or 'latest', or `None` for the default
block
:returns: the requested block
:raises: :exc:`KeyError` if the block does not exist
"""
assert 'chain' in self.app.services
chain = self.app.services.chain.chain
if block_id is None:
block_id = self.default_block
else:
self.default_block = block_id
if block_id == 'pending':
return self.app.services.chain.chain.head_candidate
if block_id == 'latest':
return chain.head
if block_id == 'earliest':
block_id = 0
if is_numeric(block_id):
# by number
hash_ = chain.index.get_block_by_number(block_id)
else:
# by hash
assert is_string(block_id)
hash_ = block_id
return chain.get(hash_)
def newFilter(self, filter_dict):
if not isinstance(filter_dict, dict):
raise BadRequestError('Filter must be an object')
required_keys = set(['fromBlock', 'toBlock'])
if not required_keys.issubset(set(filter_dict.keys())):
raise BadRequestError('Invalid filter object')
b0 = self.json_rpc_server.get_block(filter_dict['fromBlock'])
b1 = self.json_rpc_server.get_block(filter_dict['toBlock'])
address = filter_dict.get('address', None)
if is_string(address):
addresses = [address_decoder(address)]
elif isinstance(address, Iterable):
addresses = [address_decoder(addr) for addr in address]
elif address is None:
addresses = None
else:
raise JSONRPCInvalidParamsError('Parameter must be address or list of addresses')
topics = [data_decoder(topic) for topic in filter_dict.get('topics', [])]
blocks = [b0]
while blocks[-1] != b1:
blocks.append(blocks[-1].get_parent())
filter_ = Filter(self.chain.chain, blocks, addresses, topics)
self.filters[self.next_id] = filter_
self.next_id += 1
return self.next_id - 1
def coinbase(self):
"""Return the address that should be used as coinbase for new blocks.
The coinbase address is given by the config field pow.coinbase_hex. If this does not exist
or is `None`, the address of the first account is used instead. If there are no accounts,
the coinbase is `DEFAULT_COINBASE`.
:raises: :exc:`ValueError` if the coinbase is invalid (no string, wrong length) or there is
no account for it and the config flag `accounts.check_coinbase` is set (does not
apply to the default coinbase)
"""
cb_hex = self.app.config.get('pow', {}).get('coinbase_hex')
if cb_hex is None:
if not self.accounts_with_address:
return DEFAULT_COINBASE
cb = self.accounts_with_address[0].address
else:
if not is_string(cb_hex):
raise ValueError('coinbase must be string')
try:
cb = decode_hex(remove_0x_head(cb_hex))
except (ValueError, TypeError):
raise ValueError('invalid coinbase')
if len(cb) != 20:
raise ValueError('wrong coinbase length')
if self.config['accounts']['must_include_coinbase']:
if cb not in (acct.address for acct in self.accounts):
raise ValueError('no account for coinbase')
return cb
def newFilter(self, filter_dict):
if not isinstance(filter_dict, dict):
raise BadRequestError('Filter must be an object')
required_keys = set(['fromBlock', 'toBlock'])
if not required_keys.issubset(set(filter_dict.keys())):
raise BadRequestError('Invalid filter object')
b0 = self.json_rpc_server.get_block(block_id_decoder(filter_dict['fromBlock']))
b1 = self.json_rpc_server.get_block(block_id_decoder(filter_dict['toBlock']))
if b1.number < b0.number:
raise BadRequestError('fromBlock must be prior or equal to toBlock')
address = filter_dict.get('address', None)
if is_string(address):
addresses = [address_decoder(address)]
elif isinstance(address, Iterable):
addresses = [address_decoder(addr) for addr in address]
elif address is None:
addresses = None
else:
raise JSONRPCInvalidParamsError('Parameter must be address or list of addresses')
topics = [data_decoder(topic) for topic in filter_dict.get('topics', [])]
blocks = [b1]
while blocks[-1] != b1:
blocks.append(blocks[-1].get_parent())
filter_ = Filter(self.chain.chain, reversed(blocks), addresses, topics)
self.filters[self.next_id] = filter_
self.next_id += 1
return self.next_id - 1
def get_block(self, block_id=None):
"""Return the block identified by `block_id`.
This method also sets :attr:`default_block` to the value of `block_id`
which will be returned if, at later calls, `block_id` is not provided.
Subdispatchers using this function have to ensure sure that a
chainmanager is registered via :attr:`required_services`.
:param block_id: either the block number as integer or 'pending',
'earliest' or 'latest', or `None` for the default
block
:returns: the requested block
:raises: :exc:`KeyError` if the block does not exist
"""
assert 'chain' in self.app.services
chain = self.app.services.chain.chain
if block_id is None:
block_id = self.default_block
else:
self.default_block = block_id
if block_id == 'pending':
return self.app.services.chain.chain.head_candidate
if block_id == 'latest':
return chain.head
if block_id == 'earliest':
block_id = 0
if is_numeric(block_id):
# by number
hash_ = chain.index.get_block_by_number(block_id)
else:
# by hash
assert is_string(block_id)
hash_ = block_id
return chain.get(hash_)
def coinbase(self):
"""Return the address that should be used as coinbase for new blocks.
The coinbase address is given by the config field pow.coinbase_hex. If this does not exist
or is `None`, the address of the first account is used instead. If there are no accounts,
the coinbase is `DEFAULT_COINBASE`.
:raises: :exc:`ValueError` if the coinbase is invalid (no string, wrong length) or there is
no account for it and the config flag `accounts.check_coinbase` is set (does not
apply to the default coinbase)
"""
cb_hex = self.app.config.get('pow', {}).get('coinbase_hex')
if cb_hex is None:
if not self.accounts_with_address:
return DEFAULT_COINBASE
cb = self.accounts_with_address[0].address
else:
if not is_string(cb_hex):
raise ValueError('coinbase must be string')
try:
cb = decode_hex(remove_0x_head(cb_hex))
except (ValueError, TypeError):
raise ValueError('invalid coinbase')
if len(cb) != 20:
raise ValueError('wrong coinbase length')
if self.config['accounts']['must_include_coinbase']:
if cb not in (acct.address for acct in self.accounts):
raise ValueError('no account for coinbase')
return cb
def __init__(self, contract_interface):
if is_string(contract_interface):
contract_interface = json_decode(contract_interface)
self.constructor_data = None
self.function_data = {}
self.event_data = {}
for description in contract_interface:
encode_types = [
element['type'] for element in description['inputs']
]
signature = [(element['type'], element['name'])
for element in description['inputs']]
# type can be omitted, defaulting to function
if description.get('type', 'function') == 'function':
normalized_name = normalize_name(description['name'])
decode_types = [
element['type'] for element in description['outputs']
]
self.function_data[normalized_name] = {
'prefix': method_id(normalized_name, encode_types),
'encode_types': encode_types,
'decode_types': decode_types,
'is_constant': description.get('constant', False),
'signature': signature,
}
elif description['type'] == 'event':
normalized_name = normalize_name(description['name'])
indexed = [
element['indexed'] for element in description['inputs']
]
names = [element['name'] for element in description['inputs']]
# event_id == topics[0]
self.event_data[event_id(normalized_name, encode_types)] = {
'types': encode_types,
'name': normalized_name,
'names': names,
'indexed': indexed,
'anonymous': description.get('anonymous', False),
}
elif description['type'] == 'constructor':
if self.constructor_data is not None:
raise ValueError('Only one constructor is supported.')
self.constructor_data = {
'encode_types': encode_types,
'signature': signature,
}
else:
raise ValueError('Unknown type {}'.format(description['type']))
def decint(n):
if is_numeric(n) and n < 2**256 and n > -2**255:
return n
elif is_numeric(n):
raise Exception("Number out of range: %r" % n)
elif is_string(n) and len(n) == 40:
return big_endian_to_int(decode_hex(n))
elif is_string(n) and len(n) <= 32:
return big_endian_to_int(n)
elif is_string(n) and len(n) > 32:
raise Exception("String too long: %r" % n)
elif n is True:
return 1
elif n is False or n is None:
return 0
else:
raise Exception("Cannot encode integer: %r" % n)
def decint(n):
if is_numeric(n) and n < 2**256 and n > -2**255:
return n
elif is_numeric(n):
raise Exception("Number out of range: %r" % n)
elif is_string(n) and len(n) == 40:
return big_endian_to_int(decode_hex(n))
elif is_string(n) and len(n) <= 32:
return big_endian_to_int(n)
elif is_string(n) and len(n) > 32:
raise Exception("String too long: %r" % n)
elif n is True:
return 1
elif n is False or n is None:
return 0
else:
raise Exception("Cannot encode integer: %r" % n)
def from_snapshot(cls, snapshot_data, env, executing_on_head=False):
state = State(env=env)
if "alloc" in snapshot_data:
for addr, data in snapshot_data["alloc"].items():
if len(addr) == 40:
addr = decode_hex(addr)
assert len(addr) == 20
if 'wei' in data:
state.set_balance(addr, parse_as_int(data['wei']))
if 'balance' in data:
state.set_balance(addr, parse_as_int(data['balance']))
if 'code' in data:
state.set_code(addr, parse_as_bin(data['code']))
if 'nonce' in data:
state.set_nonce(addr, parse_as_int(data['nonce']))
if 'storage' in data:
for k, v in data['storage'].items():
state.set_storage_data(
addr,
big_endian_to_int(parse_as_bin(k)),
big_endian_to_int(parse_as_bin(v)))
elif "state_root" in snapshot_data:
state.trie.root_hash = parse_as_bin(snapshot_data["state_root"])
else:
raise Exception(
"Must specify either alloc or state root parameter")
for k, default in STATE_DEFAULTS.items():
default = copy.copy(default)
v = snapshot_data[k] if k in snapshot_data else None
if is_numeric(default):
setattr(state, k, parse_as_int(v)
if k in snapshot_data else default)
elif is_string(default):
setattr(state, k, parse_as_bin(v)
if k in snapshot_data else default)
elif k == 'prev_headers':
if k in snapshot_data:
headers = [dict_to_prev_header(h) for h in v]
else:
headers = default
setattr(state, k, headers)
elif k == 'recent_uncles':
if k in snapshot_data:
uncles = {}
for height, _uncles in v.items():
uncles[int(height)] = []
for uncle in _uncles:
uncles[int(height)].append(parse_as_bin(uncle))
else:
uncles = default
setattr(state, k, uncles)
if executing_on_head:
state.executing_on_head = True
state.commit()
state.changed = {}
return state
def set_root_hash(self, root_hash):
assert is_string(root_hash)
assert len(root_hash) in [0, 32]
if self.transient:
self.transient_root_hash = root_hash
return
if root_hash == BLANK_ROOT:
self.root_node = BLANK_NODE
return
# print(repr(root_hash))
self.root_node = self._decode_to_node(root_hash)
def update(self, key, value):
'''
:param key: a string
:value: a string
'''
if not is_string(key):
raise Exception("Key must be string")
# if len(key) > 32:
# raise Exception("Max key length is 32")
if not is_string(value):
raise Exception("Value must be string")
# if value == '':
# return self.delete(key)
old_root = copy.deepcopy(self.root_node)
self.root_node = self._update_and_delete_storage(
self.root_node, bin_to_nibbles(to_string(key)), to_string(value))
self.replace_root_hash(old_root, self.root_node)
def set_root_hash(self, root_hash):
assert is_string(root_hash)
assert len(root_hash) in [0, 32]
if self.transient:
self.transient_root_hash = root_hash
return
if root_hash == BLANK_ROOT:
self.root_node = BLANK_NODE
return
# print repr(root_hash)
self.root_node = self._decode_to_node(root_hash)
def new(cls, password, key=None, uuid=None, path=None):
"""
:param password:
:param key:
:param uuid:
:param path:
:return:
"""
if key is None:
key = mk_random_privkey()
# [NOTE]: key and password should be bytes
if not is_string(key):
key = to_string(key)
if not is_string(password):
password = to_string(password)
account = cls.create(key)
keystore = Account.encrypt(account.privateKey, password)
return Account(keystore, password, path)
def new(cls, password, key=None, uuid=None, path=None):
"""Create a new account.
Note that this creates the account in memory and does not store it on disk.
:param password: the password used to encrypt the private key
:param key: the private key, or `None` to generate a random one
:param uuid: an optional id
"""
if key is None:
key = mk_random_privkey()
# [NOTE]: key and password should be bytes
if not is_string(key):
key = to_string(key)
if not is_string(password):
password = to_string(password)
keystore = keys.make_keystore_json(key, password)
keystore['id'] = uuid
return Account(keystore, password, path)
def update(self, key, value):
'''
:param key: a string
:value: a string
'''
if not is_string(key):
raise Exception("Key must be string")
# if len(key) > 32:
# raise Exception("Max key length is 32")
if not is_string(value):
raise Exception("Value must be string")
# if value == '':
# return self.delete(key)
old_root = copy.deepcopy(self.root_node)
self.root_node = self._update_and_delete_storage(
self.root_node,
bin_to_nibbles(to_string(key)),
value)
self.replace_root_hash(old_root, self.root_node)
def delete(self, key):
'''
:param key: a string with length of [0, 32]
'''
if not is_string(key):
raise Exception("Key must be string")
if len(key) > 32:
raise Exception("Max key length is 32")
old_root = copy.deepcopy(self.root_node)
self.root_node = self._delete_and_delete_storage(
self.root_node, bin_to_nibbles(to_string(key)))
self.replace_root_hash(old_root, self.root_node)
def delete(self, key):
'''
:param key: a string with length of [0, 32]
'''
if not is_string(key):
raise Exception("Key must be string")
if len(key) > 32:
raise Exception("Max key length is 32")
old_root = copy.deepcopy(self.root_node)
self.root_node = self._delete_and_delete_storage(
self.root_node,
bin_to_nibbles(to_string(key)))
self.replace_root_hash(old_root, self.root_node)
def newFilter(self, filter_dict):
log.debug('in newFilter', filter_dict=filter_dict)
if not isinstance(filter_dict, dict):
raise BadRequestError('Filter must be an object')
address = filter_dict.get('address', None)
if is_string(address):
addresses = [address_decoder(address)]
elif isinstance(address, Iterable):
addresses = [address_decoder(addr) for addr in address]
elif address is None:
addresses = None
else:
raise JSONRPCInvalidParamsError('Parameter must be address or list of addresses')
if 'topics' in filter_dict:
topics = []
for topic in filter_dict['topics']:
if topic is not None:
log.debug('with topic', topic=topic)
log.debug('decoded', topic=data_decoder(topic))
log.debug('int', topic=big_endian_to_int(data_decoder(topic)))
topics.append(big_endian_to_int(data_decoder(topic)))
else:
topics.append(None)
else:
topics = None
fromBlock = filter_dict.get('fromBlock')
toBlock = filter_dict.get('toBlock') or 'latest'
if toBlock in ('latest', 'pending'):
assert fromBlock in (None, toBlock) , 'latest/pending does not support ranges'
filter_ = Filter(self.chain.chain, blocks=[], addresses=addresses, topics=topics,
pending=bool(toBlock==b'pending'), latest=bool(toBlock==b'latest'))
else:
assert fromBlock not in ('latest', 'pending')
b0 = self.json_rpc_server.get_block(block_id_decoder(fromBlock))
b1 = self.json_rpc_server.get_block(block_id_decoder(toBlock))
if b1.number < b0.number:
raise BadRequestError('fromBlock must be prior or equal to toBlock')
blocks = [b1]
while blocks[-1] != b0:
blocks.append(blocks[-1].get_parent())
filter_ = Filter(self.chain.chain, blocks=list(
reversed(blocks)), addresses=addresses, topics=topics)
self.filters[self.next_id] = filter_
self.next_id += 1
return self.next_id - 1
def decint(n, signed=False): # pylint: disable=invalid-name,too-many-branches
""" Decode an unsigned/signed integer. """
if isinstance(n, str):
n = utils.to_string(n)
if n is True:
return 1
if n is False:
return 0
if n is None:
return 0
if is_numeric(n):
if signed:
if not -TT255 <= n <= TT255 - 1:
raise EncodingError('Number out of range: %r' % n)
else:
if not 0 <= n <= TT256 - 1:
raise EncodingError('Number out of range: %r' % n)
return n
if is_string(n):
if len(n) > 32:
raise EncodingError('String too long: %r' % n)
if len(n) == 40:
int_bigendian = decode_hex(n)
else:
int_bigendian = n # pylint: disable=redefined-variable-type
result = big_endian_to_int(int_bigendian)
if signed:
if result >= TT255:
result -= TT256
if not -TT255 <= result <= TT255 - 1:
raise EncodingError('Number out of range: %r' % n)
else:
if not 0 <= result <= TT256 - 1:
raise EncodingError('Number out of range: %r' % n)
return result
raise EncodingError('Cannot decode integer: %r' % n)
def __init__(self, full_signature):
self.function_data = {}
self.event_data = {}
v = vars(self)
if is_string(full_signature):
full_signature = json_decode(full_signature)
for sig_item in full_signature:
if sig_item['type'] == 'constructor':
continue
encode_types = [f['type'] for f in sig_item['inputs']]
signature = [(f['type'], f['name']) for f in sig_item['inputs']]
name = sig_item['name']
if '(' in name:
name = name[:name.find('(')]
if name in v:
i = 2
while name + utils.to_string(i) in v:
i += 1
name += utils.to_string(i)
sys.stderr.write("Warning: multiple methods with the same "
" name. Use %s to call %s with types %r"
% (name, sig_item['name'], encode_types))
if sig_item['type'] == 'function':
decode_types = [f['type'] for f in sig_item['outputs']]
is_unknown_type = len(sig_item['outputs']) and \
sig_item['outputs'][0]['name'] == 'unknown_out'
self.function_data[name] = {
"prefix": method_id(name, encode_types),
"encode_types": encode_types,
"decode_types": decode_types,
"is_unknown_type": is_unknown_type,
"is_constant": sig_item.get('constant', False),
"signature": signature
}
elif sig_item['type'] == 'event':
indexed = [f['indexed'] for f in sig_item['inputs']]
names = [f['name'] for f in sig_item['inputs']]
self.event_data[event_id(name, encode_types)] = {
"types": encode_types,
"name": name,
"names": names,
"indexed": indexed,
"anonymous": sig_item.get('anonymous', False)
}
def __init__(self, full_signature):
self.function_data = {}
self.event_data = {}
v = vars(self)
if is_string(full_signature):
full_signature = json_decode(full_signature)
for sig_item in full_signature:
encode_types = [f['type'] for f in sig_item['inputs']]
signature = [(f['type'], f['name']) for f in sig_item['inputs']]
name = sig_item['name']
if '(' in name:
name = name[:name.find('(')]
if name in v:
i = 2
while name + utils.to_string(i) in v:
i += 1
name += utils.to_string(i)
sys.stderr.write("Warning: multiple methods with the same "
" name. Use %s to call %s with types %r" %
(name, sig_item['name'], encode_types))
sig = name + '(' + ','.join(encode_types) + ')'
if sig_item['type'] == 'function':
prefix = big_endian_to_int(utils.sha3(sig)[:4])
decode_types = [f['type'] for f in sig_item['outputs']]
is_unknown_type = len(sig_item['outputs']) and \
sig_item['outputs'][0]['name'] == 'unknown_out'
self.function_data[name] = {
"prefix": prefix,
"encode_types": encode_types,
"decode_types": decode_types,
"is_unknown_type": is_unknown_type,
"is_constant": sig_item.get('constant', False),
"signature": signature
}
elif sig_item['type'] == 'event':
prefix = big_endian_to_int(utils.sha3(sig))
indexed = [f['indexed'] for f in sig_item['inputs']]
names = [f['name'] for f in sig_item['inputs']]
self.event_data[prefix] = {
"types": encode_types,
"name": name,
"names": names,
"indexed": indexed,
}
def __init__(self, full_signature):
self.function_data = {}
self.event_data = {}
v = vars(self)
if is_string(full_signature):
full_signature = json_decode(full_signature)
for sig_item in full_signature:
encode_types = [f['type'] for f in sig_item['inputs']]
signature = [(f['type'], f['name']) for f in sig_item['inputs']]
name = sig_item['name']
if '(' in name:
name = name[:name.find('(')]
if name in v:
i = 2
while name + utils.to_string(i) in v:
i += 1
name += utils.to_string(i)
sys.stderr.write("Warning: multiple methods with the same "
" name. Use %s to call %s with types %r"
% (name, sig_item['name'], encode_types))
sig = name + '(' + ','.join(encode_types) + ')'
if sig_item['type'] == 'function':
prefix = big_endian_to_int(utils.sha3(sig)[:4])
decode_types = [f['type'] for f in sig_item['outputs']]
is_unknown_type = len(sig_item['outputs']) and \
sig_item['outputs'][0]['name'] == 'unknown_out'
self.function_data[name] = {
"prefix": prefix,
"encode_types": encode_types,
"decode_types": decode_types,
"is_unknown_type": is_unknown_type,
"is_constant": sig_item.get('constant', False),
"signature": signature
}
elif sig_item['type'] == 'event':
prefix = big_endian_to_int(utils.sha3(sig))
indexed = [f['indexed'] for f in sig_item['inputs']]
names = [f['name'] for f in sig_item['inputs']]
self.event_data[prefix] = {
"types": encode_types,
"name": name,
"names": names,
"indexed": indexed,
}
def __init__(self, full_signature):
self.function_data = {}
self.event_data = {}
v = vars(self)
if is_string(full_signature):
full_signature = json_decode(full_signature)
for sig_item in full_signature:
if sig_item['type'] == 'constructor':
continue
encode_types = [f['type'] for f in sig_item['inputs']]
signature = [(f['type'], f['name']) for f in sig_item['inputs']]
name = sig_item['name']
if '(' in name:
name = name[:name.find('(')]
if name in v:
i = 2
while name + utils.to_string(i) in v:
i += 1
name += utils.to_string(i)
sys.stderr.write("Warning: multiple methods with the same "
" name. Use %s to call %s with types %r" %
(name, sig_item['name'], encode_types))
if sig_item['type'] == 'function':
decode_types = [f['type'] for f in sig_item['outputs']]
is_unknown_type = len(sig_item['outputs']) and \
sig_item['outputs'][0]['name'] == 'unknown_out'
self.function_data[name] = {
"prefix": method_id(name, encode_types),
"encode_types": encode_types,
"decode_types": decode_types,
"is_unknown_type": is_unknown_type,
"is_constant": sig_item.get('constant', False),
"signature": signature
}
elif sig_item['type'] == 'event':
indexed = [f['indexed'] for f in sig_item['inputs']]
names = [f['name'] for f in sig_item['inputs']]
self.event_data[event_id(name, encode_types)] = {
"types": encode_types,
"name": name,
"names": names,
"indexed": indexed,
"anonymous": sig_item.get('anonymous', False)
}
def decode_filter(filter_dict, block):
"""Decodes a filter as expected by eth_newFilter or eth_getLogs to a :class:`Filter`."""
if not isinstance(filter_dict, dict):
raise Exception('Filter must be an object')
address = filter_dict.get('address', None)
if utils.is_string(address):
addresses = [decode_hex(strip_0x(address))]
elif isinstance(address, Iterable):
addresses = [decode_hex(strip_0x(addr)) for addr in address]
elif address is None:
addresses = None
else:
raise Exception('Parameter must be address or list of addresses')
if 'topics' in filter_dict:
topics = []
for topic in filter_dict['topics']:
if topic is not None:
topics.append(utils.big_endian_to_int(decode_hex(strip_0x(topic))))
else:
topics.append(None)
else:
topics = None
from_block = filter_dict.get('fromBlock') or 'latest'
to_block = filter_dict.get('toBlock') or 'latest'
if from_block not in ('earliest', 'latest', 'pending'):
from_block = decode_number(from_block)
if to_block not in ('earliest', 'latest', 'pending'):
to_block = decode_number(to_block)
# check order
block_id_dict = {
'earliest': 0,
'latest': block.number,
'pending': block.number+1
}
range_ = [b if utils.is_numeric(b) else block_id_dict[b] for b in (from_block, to_block)]
if range_[0] > range_[1]:
raise Exception('fromBlock must be newer or equal to toBlock')
return {"from_block": from_block, "to_block": to_block, "addresses": addresses, "topics": topics}
def quantity_decoder(data):
"""Decode `data` representing a quantity."""
if not is_string(data):
success = False
elif not data.startswith('0x'):
success = False # must start with 0x prefix
elif len(data) > 3 and data[2] == '0':
success = False # must not have leading zeros (except `0x0`)
else:
data = data[2:]
# ensure even length
if len(data) % 2 == 1:
data = '0' + data
try:
return int(data, 16)
except ValueError:
success = False
assert not success
raise BadRequestError('Invalid quantity encoding')
def quantity_decoder(data):
"""Decode `data` representing a quantity."""
if not is_string(data):
success = False
elif not data.startswith('0x'):
success = False # must start with 0x prefix
elif len(data) > 3 and data[2] == '0':
success = False # must not have leading zeros (except `0x0`)
else:
data = data[2:]
# ensure even length
if len(data) % 2 == 1:
data = '0' + data
try:
return int(data, 16)
except ValueError:
success = False
assert not success
raise BadRequestError('Invalid quantity encoding')
def decode_number(data):
"""Decode `data` representing a number."""
if hasattr(data, '__int__'):
return data
elif not is_string(data):
success = False
elif not data.startswith('0x'):
success = False # must start with 0x prefix
elif len(data) > 3 and data[2] == '0':
success = False # must not have leading zeros (except `0x0`)
else:
data = data[2:]
# ensure even length
if len(data) % 2 == 1:
data = '0' + data
try:
return int(data, 16)
except ValueError:
success = False
assert not success
raise Exception('Invalid number encoding: %s' % data)
def decint(n, signed=False):
if isinstance(n, str):
n = utils.to_string(n)
if is_numeric(n):
min_, max_ = (-TT255, TT255 - 1) if signed else (0, TT256 - 1)
if n > max_ or n < min_:
raise EncodingError("Number out of range: %r" % n)
return n
elif is_string(n):
if len(n) == 40:
n = decode_hex(n)
if len(n) > 32:
raise EncodingError("String too long: %r" % n)
i = big_endian_to_int(n)
return (i - TT256) if signed and i >= TT255 else i
elif n is True:
return 1
elif n is False or n is None:
return 0
else:
raise EncodingError("Cannot encode integer: %r" % n)
def newFilter(self, filter_dict):
if not isinstance(filter_dict, dict):
raise BadRequestError('Filter must be an object')
b0 = self.json_rpc_server.get_block(
block_id_decoder(filter_dict.get('fromBlock', 'latest')))
b1 = self.json_rpc_server.get_block(
block_id_decoder(filter_dict.get('toBlock', 'latest')))
if b1.number < b0.number:
raise BadRequestError(
'fromBlock must be prior or equal to toBlock')
address = filter_dict.get('address', None)
if is_string(address):
addresses = [address_decoder(address)]
elif isinstance(address, Iterable):
addresses = [address_decoder(addr) for addr in address]
elif address is None:
addresses = None
else:
raise JSONRPCInvalidParamsError(
'Parameter must be address or list of addresses')
if 'topics' in filter_dict:
topics = []
for topic in filter_dict['topics']:
if topic is not None:
topics.append(big_endian_to_int(data_decoder(topic)))
else:
topics.append(None)
else:
topics = None
blocks = [b1]
while blocks[-1] != b0:
blocks.append(blocks[-1].get_parent())
filter_ = Filter(self.chain.chain, reversed(blocks), addresses, topics)
self.filters[self.next_id] = filter_
self.next_id += 1
return self.next_id - 1
def __init__(self,
compiled_abi,
compiled_code,
name,
constructor_args=[],
sender=tester.k0,
endowment=0,
gas=None,
state=None,
log_listener=None):
if not state:
state = tester.state()
self.state = state
if is_string(compiled_abi):
compiled_abi = abi.json_decode(compiled_abi)
for item in compiled_abi:
if item['type'] == 'constructor':
item['type'] = 'function'
item['name'] = name
item['outputs'] = []
break
self._translator = tester.abi.ContractTranslator(compiled_abi)
if log_listener:
self.state.block.log_listeners.append(lambda x: log_listener(
self._translator.listen(x, noprint=True)))
if len(constructor_args) > 0:
compiled_code += self._translator.encode(name,
constructor_args)[4:]
self.address = self.state.evm(compiled_code, sender, endowment, gas)
assert len(self.state.block.get_code(self.address)), \
"Contract code empty"
def kall_factory(f):
def kall(*args, **kwargs):
o = self.state._send(
kwargs.get('sender', tester.k0), self.address,
kwargs.get('value', 0), self._translator.encode(f, args),
**tester.dict_without(kwargs, 'sender', 'value', 'output'))
# Compute output data
if kwargs.get('output', '') == 'raw':
outdata = o['output']
elif not o['output']:
outdata = None
else:
outdata = self._translator.decode(f, o['output'])
outdata = outdata[0] if len(outdata) == 1 \
else outdata
# Format output
if kwargs.get('profiling', ''):
return dict_with(o, output=outdata)
else:
return outdata
return kall
for f in self._translator.function_data:
vars(self)[f] = kall_factory(f)
def fetch_hashchain(self):
log_st.debug('fetching hashchain')
blockhashes_chain = [self.blockhash] # youngest to oldest
# For testing purposes: skip the hash downoading stage
# import ast
# blockhashes_chain = ast.literal_eval(open('/home/vub/blockhashes.pyast').read())[:299000]
blockhash = self.blockhash = blockhashes_chain[-1]
assert blockhash not in self.chain
# get block hashes until we found a known one
max_blockhashes_per_request = self.initial_blockhashes_per_request
while blockhash not in self.chain:
# proto with highest_difficulty should be the proto we got the newblock from
blockhashes_batch = []
# try with protos
protocols = self.protocols
if not protocols:
log_st.warn('no protocols available')
return self.exit(success=False)
for proto in protocols:
log.debug('syncing with', proto=proto)
if proto.is_stopped:
continue
# request
assert proto not in self.requests
deferred = AsyncResult()
self.requests[proto] = deferred
proto.send_getblockhashes(blockhash, max_blockhashes_per_request)
try:
blockhashes_batch = deferred.get(block=True,
timeout=self.blockhashes_request_timeout)
except gevent.Timeout:
log_st.warn('syncing hashchain timed out')
continue
finally:
# is also executed 'on the way out' when any other clause of the try statement
# is left via a break, continue or return statement.
del self.requests[proto]
if not blockhashes_batch:
log_st.warn('empty getblockhashes result')
continue
if not all(isinstance(bh, bytes) for bh in blockhashes_batch):
log_st.warn('got wrong data type', expected='bytes',
received=type(blockhashes_batch[0]))
continue
break
if not blockhashes_batch:
log_st.warn('syncing failed with all peers', num_protos=len(protocols))
return self.exit(success=False)
for blockhash in blockhashes_batch: # youngest to oldest
assert utils.is_string(blockhash)
if blockhash not in self.chain:
blockhashes_chain.append(blockhash)
else:
log_st.debug('found known blockhash', blockhash=utils.encode_hex(blockhash),
is_genesis=bool(blockhash == self.chain.genesis.hash))
break
log_st.debug('downloaded ' + str(len(blockhashes_chain)) + ' block hashes, ending with %s' % utils.encode_hex(blockhashes_chain[-1]))
max_blockhashes_per_request = self.max_blockhashes_per_request
self.fetch_blocks(blockhashes_chain)
def encode_single(typ, arg):
base, sub, _ = typ
# Unsigned integers: uint<sz>
if base == 'uint':
sub = int(sub)
i = decint(arg)
if not 0 <= i < 2**sub:
raise ValueOutOfBounds(repr(arg))
return zpad(encode_int(i), 32)
# bool: int<sz>
elif base == 'bool':
assert isinstance(arg, bool)
return zpad(encode_int(int(arg)), 32)
# Signed integers: int<sz>
elif base == 'int':
sub = int(sub)
i = decint(arg)
if not -2**(sub - 1) <= i < 2**sub:
raise ValueOutOfBounds(repr(arg))
return zpad(encode_int(i % 2**sub), 32)
# Unsigned reals: ureal<high>x<low>
elif base == 'ureal':
high, low = [int(x) for x in sub.split('x')]
if not 0 <= arg < 2**high:
raise ValueOutOfBounds(repr(arg))
return zpad(encode_int(arg * 2**low), 32)
# Signed reals: real<high>x<low>
elif base == 'real':
high, low = [int(x) for x in sub.split('x')]
if not -2**(high - 1) <= arg < 2**(high - 1):
raise ValueOutOfBounds(repr(arg))
return zpad(encode_int((arg % 2**high) * 2**low), 32)
# Strings
elif base == 'string' or base == 'bytes':
if not is_string(arg):
raise EncodingError("Expecting string: %r" % arg)
# Fixed length: string<sz>
if len(sub):
assert int(sub) <= 32
assert len(arg) <= int(sub)
return arg + b'\x00' * (32 - len(arg))
# Variable length: string
else:
return zpad(encode_int(len(arg)), 32) + \
arg + \
b'\x00' * (utils.ceil32(len(arg)) - len(arg))
# Hashes: hash<sz>
elif base == 'hash':
if not (int(sub) and int(sub) <= 32):
raise EncodingError("too long: %r" % arg)
if isnumeric(arg):
return zpad(encode_int(arg), 32)
elif len(arg) == len(sub):
return zpad(arg, 32)
elif len(arg) == len(sub) * 2:
return zpad(decode_hex(arg), 32)
else:
raise EncodingError("Could not parse hash: %r" % arg)
# Addresses: address (== hash160)
elif base == 'address':
assert sub == ''
if isnumeric(arg):
return zpad(encode_int(arg), 32)
elif len(arg) == 20:
return zpad(arg, 32)
elif len(arg) == 40:
return zpad(decode_hex(arg), 32)
else:
raise EncodingError("Could not parse address: %r" % arg)
raise EncodingError("Unhandled type: %r %r" % (base, sub))
def add_block(self, block):
now = self.localtime
# Are we receiving the block too early?
if block.header.timestamp > now:
i = 0
while i < len(self.time_queue
) and block.timestamp > self.time_queue[i].timestamp:
i += 1
self.time_queue.insert(i, block)
log.info(
'Block received too early (%d vs %d). Delaying for %d seconds'
% (now, block.header.timestamp, block.header.timestamp - now))
return False
# Is the block being added to the head?
if block.header.prevhash == self.head_hash:
log.info('Adding to head',
head=encode_hex(block.header.prevhash[:4]))
self.state.deletes = []
self.state.changed = {}
try:
apply_block(self.state, block)
except (AssertionError, KeyError, ValueError, InvalidTransaction,
VerificationFailed) as e:
log.info('Block %d (%s) with parent %s invalid, reason: %s' %
(block.number, encode_hex(block.header.hash[:4]),
encode_hex(block.header.prevhash[:4]), str(e)))
return False
self.db.put(b'block:%d' % block.header.number, block.header.hash)
# side effect: put 'score:' cache in db
block_score = self.get_score(block)
self.head_hash = block.header.hash
for i, tx in enumerate(block.transactions):
self.db.put(b'txindex:' + tx.hash,
rlp.encode([block.number, i]))
assert self.get_blockhash_by_number(
block.header.number) == block.header.hash
deletes = self.state.deletes
changed = self.state.changed
# Or is the block being added to a chain that is not currently the
# head?
elif block.header.prevhash in self.env.db:
log.info(
'Receiving block %d (%s) not on head (%s), adding to secondary post state %s'
% (block.number, encode_hex(
block.header.hash[:4]), encode_hex(self.head_hash[:4]),
encode_hex(block.header.prevhash[:4])))
temp_state = self.mk_poststate_of_blockhash(block.header.prevhash)
try:
apply_block(temp_state, block)
except (AssertionError, KeyError, ValueError, InvalidTransaction,
VerificationFailed) as e:
log.info('Block %s with parent %s invalid, reason: %s' %
(encode_hex(block.header.hash[:4]),
encode_hex(block.header.prevhash[:4]), str(e)))
return False
deletes = temp_state.deletes
block_score = self.get_score(block)
changed = temp_state.changed
# If the block should be the new head, replace the head
if block_score > self.get_score(self.head):
b = block
new_chain = {}
# Find common ancestor
while b.header.number >= int(self.db.get(b'GENESIS_NUMBER')):
new_chain[b.header.number] = b
key = b'block:%d' % b.header.number
orig_at_height = self.db.get(
key) if key in self.db else None
if orig_at_height == b.header.hash:
break
if b.prevhash not in self.db or self.db.get(
b.prevhash) == b'GENESIS':
break
b = self.get_parent(b)
replace_from = b.header.number
# Replace block index and tx indices, and edit the state cache
# Get a list of all accounts that have been edited along the old and
# new chains
changed_accts = {}
# Read: for i in range(common ancestor block number...new block
# number)
for i in itertools.count(replace_from):
log.info('Rewriting height %d' % i)
key = b'block:%d' % i
# Delete data for old blocks
orig_at_height = self.db.get(
key) if key in self.db else None
if orig_at_height:
orig_block_at_height = self.get_block(orig_at_height)
log.info('%s no longer in main chain' %
encode_hex(orig_block_at_height.header.hash))
# Delete from block index
self.db.delete(key)
# Delete from txindex
for tx in orig_block_at_height.transactions:
if b'txindex:' + tx.hash in self.db:
self.db.delete(b'txindex:' + tx.hash)
# Add to changed list
acct_list = self.db.get(b'changed:' +
orig_block_at_height.hash)
for j in range(0, len(acct_list), 20):
changed_accts[acct_list[j:j + 20]] = True
# Add data for new blocks
if i in new_chain:
new_block_at_height = new_chain[i]
log.info('%s now in main chain' %
encode_hex(new_block_at_height.header.hash))
# Add to block index
self.db.put(key, new_block_at_height.header.hash)
# Add to txindex
for j, tx in enumerate(
new_block_at_height.transactions):
self.db.put(
b'txindex:' + tx.hash,
rlp.encode([new_block_at_height.number, j]))
# Add to changed list
if i < b.number:
acct_list = self.db.get(b'changed:' +
new_block_at_height.hash)
for j in range(0, len(acct_list), 20):
changed_accts[acct_list[j:j + 20]] = True
if i not in new_chain and not orig_at_height:
break
# Add changed list from new head to changed list
for c in changed.keys():
changed_accts[c] = True
# Update the on-disk state cache
for addr in changed_accts.keys():
data = temp_state.trie.get(addr)
if data:
self.state.db.put(b'address:' + addr, data)
else:
try:
self.state.db.delete(b'address:' + addr)
except KeyError:
pass
self.head_hash = block.header.hash
self.state = temp_state
self.state.executing_on_head = True
# Block has no parent yet
else:
if block.header.prevhash not in self.parent_queue:
self.parent_queue[block.header.prevhash] = []
self.parent_queue[block.header.prevhash].append(block)
log.info(
'Got block %d (%s) with prevhash %s, parent not found. Delaying for now'
% (block.number, encode_hex(
block.hash[:4]), encode_hex(block.prevhash[:4])))
return False
self.add_child(block)
self.db.put(b'head_hash', self.head_hash)
self.db.put(block.hash, rlp.encode(block))
self.db.put(
b'changed:' + block.hash, b''.join([
k.encode() if not is_string(k) else k
for k in list(changed.keys())
]))
print('Saved %d address change logs' % len(changed.keys()))
self.db.put(b'deletes:' + block.hash, b''.join(deletes))
log.debug('Saved %d trie node deletes for block %d (%s)' %
(len(deletes), block.number, utils.encode_hex(block.hash)))
# Delete old junk data
old_block_hash = self.get_blockhash_by_number(block.number -
self.max_history)
if old_block_hash:
try:
deletes = self.db.get(b'deletes:' + old_block_hash)
log.debug('Deleting up to %d trie nodes' %
(len(deletes) // 32))
rdb = RefcountDB(self.db)
for i in range(0, len(deletes), 32):
rdb.delete(deletes[i:i + 32])
self.db.delete(b'deletes:' + old_block_hash)
self.db.delete(b'changed:' + old_block_hash)
except KeyError as e:
print(e)
pass
self.db.commit()
assert (b'deletes:' + block.hash) in self.db
log.info('Added block %d (%s) with %d txs and %d gas' %
(block.header.number, encode_hex(block.header.hash)[:8],
len(block.transactions), block.header.gas_used))
# Call optional callback
if self.new_head_cb and block.header.number != 0:
self.new_head_cb(block)
# Are there blocks that we received that were waiting for this block?
# If so, process them.
if block.header.hash in self.parent_queue:
for _blk in self.parent_queue[block.header.hash]:
self.add_block(_blk)
del self.parent_queue[block.header.hash]
return True
def vm_execute(ext, msg, code):
# precompute trace flag
# if we trace vm, we're in slow mode anyway
trace_vm = log_vm_op.is_active('trace')
compustate = Compustate(gas=msg.gas)
stk = compustate.stack
mem = compustate.memory
if code in code_cache:
processed_code = code_cache[code]
else:
processed_code = preprocess_code(code)
code_cache[code] = processed_code
s = time.time()
op = None
steps = 0
_prevop = None # for trace only
while 1:
# print('op: ', op, time.time() - s)
# s = time.time()
# stack size limit error
if compustate.pc not in processed_code:
return vm_exception('INVALID START POINT')
_data = processed_code[compustate.pc]
gas, min_stack, max_stack, compustate.pc = _data[:4]
ops = _data[4:]
# out of gas error
if gas > compustate.gas:
return vm_exception('OUT OF GAS')
# insufficient stack error
if not (min_stack <= len(compustate.stack) <= max_stack):
return vm_exception('INCOMPATIBLE STACK LENGTH', min_stack=min_stack,
have=len(compustate.stack), max_stack=max_stack)
# Apply operation
compustate.gas -= gas
for op in ops:
if trace_vm:
"""
This diverges from normal logging, as we use the logging namespace
only to decide which features get logged in 'eth.vm.op'
i.e. tracing can not be activated by activating a sub
like 'eth.vm.op.stack'
"""
trace_data = {}
trace_data['stack'] = list(map(to_string, list(compustate.stack)))
if _prevop in (op_MLOAD, op_MSTORE, op_MSTORE8, op_SHA3, op_CALL,
op_CALLCODE, op_CREATE, op_CALLDATACOPY, op_CODECOPY,
op_EXTCODECOPY):
if len(compustate.memory) < 1024:
trace_data['memory'] = \
b''.join([encode_hex(ascii_chr(x)) for x
in compustate.memory])
else:
trace_data['sha3memory'] = \
encode_hex(utils.sha3(''.join([ascii_chr(x) for
x in compustate.memory])))
if _prevop in (op_SSTORE, op_SLOAD) or steps == 0:
trace_data['storage'] = ext.log_storage(msg.to)
# trace_data['gas'] = to_string(compustate.gas + fee)
trace_data['inst'] = op
trace_data['pc'] = to_string(compustate.pc - 1)
if steps == 0:
trace_data['depth'] = msg.depth
trace_data['address'] = msg.to
trace_data['op'] = op
trace_data['steps'] = steps
# if op[:4] == 'PUSH':
# trace_data['pushvalue'] = pushval
log_vm_op.trace('vm', **trace_data)
steps += 1
_prevop = op
# Invalid operation
if op == INVALID:
return vm_exception('INVALID OP', opcode=op)
# Valid operations
if op < 0x10:
if op == op_STOP:
return peaceful_exit('STOP', compustate.gas, [])
elif op == op_ADD:
stk.append((stk.pop() + stk.pop()) & TT256M1)
elif op == op_SUB:
stk.append((stk.pop() - stk.pop()) & TT256M1)
elif op == op_MUL:
stk.append((stk.pop() * stk.pop()) & TT256M1)
elif op == op_DIV:
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 // s1)
elif op == op_MOD:
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 % s1)
elif op == op_SDIV:
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(stk.pop())
stk.append(0 if s1 == 0 else (abs(s0) // abs(s1) *
(-1 if s0 * s1 < 0 else 1)) & TT256M1)
elif op == op_SMOD:
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(stk.pop())
stk.append(0 if s1 == 0 else (abs(s0) % abs(s1) *
(-1 if s0 < 0 else 1)) & TT256M1)
elif op == op_ADDMOD:
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 + s1) % s2 if s2 else 0)
elif op == op_MULMOD:
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 * s1) % s2 if s2 else 0)
elif op == op_EXP:
base, exponent = stk.pop(), stk.pop()
# fee for exponent is dependent on its bytes
# calc n bytes to represent exponent
nbytes = len(utils.encode_int(exponent))
expfee = nbytes * opcodes.GEXPONENTBYTE
if compustate.gas < expfee:
compustate.gas = 0
return vm_exception('OOG EXPONENT')
compustate.gas -= expfee
stk.append(pow(base, exponent, TT256))
elif op == op_SIGNEXTEND:
s0, s1 = stk.pop(), stk.pop()
if s0 <= 31:
testbit = s0 * 8 + 7
if s1 & (1 << testbit):
stk.append(s1 | (TT256 - (1 << testbit)))
else:
stk.append(s1 & ((1 << testbit) - 1))
else:
stk.append(s1)
elif op < 0x20:
if op == op_LT:
stk.append(1 if stk.pop() < stk.pop() else 0)
elif op == op_GT:
stk.append(1 if stk.pop() > stk.pop() else 0)
elif op == op_SLT:
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(stk.pop())
stk.append(1 if s0 < s1 else 0)
elif op == op_SGT:
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(stk.pop())
stk.append(1 if s0 > s1 else 0)
elif op == op_EQ:
stk.append(1 if stk.pop() == stk.pop() else 0)
elif op == op_ISZERO:
stk.append(0 if stk.pop() else 1)
elif op == op_AND:
stk.append(stk.pop() & stk.pop())
elif op == op_OR:
stk.append(stk.pop() | stk.pop())
elif op == op_XOR:
stk.append(stk.pop() ^ stk.pop())
elif op == op_NOT:
stk.append(TT256M1 - stk.pop())
elif op == op_BYTE:
s0, s1 = stk.pop(), stk.pop()
if s0 >= 32:
stk.append(0)
else:
stk.append((s1 // 256 ** (31 - s0)) % 256)
elif op < 0x40:
if op == op_SHA3:
s0, s1 = stk.pop(), stk.pop()
compustate.gas -= opcodes.GSHA3WORD * (utils.ceil32(s1) // 32)
if compustate.gas < 0:
return vm_exception('OOG PAYING FOR SHA3')
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
data = b''.join(map(ascii_chr, mem[s0: s0 + s1]))
stk.append(utils.big_endian_to_int(utils.sha3(data)))
elif op == op_ADDRESS:
stk.append(utils.coerce_to_int(msg.to))
elif op == op_BALANCE:
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
stk.append(ext.get_balance(addr))
elif op == op_ORIGIN:
stk.append(utils.coerce_to_int(ext.tx_origin))
elif op == op_CALLER:
stk.append(utils.coerce_to_int(msg.sender))
elif op == op_CALLVALUE:
stk.append(msg.value)
elif op == op_CALLDATALOAD:
stk.append(msg.data.extract32(stk.pop()))
elif op == op_CALLDATASIZE:
stk.append(msg.data.size)
elif op == op_CALLDATACOPY:
mstart, dstart, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
msg.data.extract_copy(mem, mstart, dstart, size)
elif op == op_CODESIZE:
stk.append(len(code))
elif op == op_CODECOPY:
start, s1, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, start, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
for i in range(size):
if s1 + i < len(code):
mem[start + i] = utils.safe_ord(code[s1 + i])
else:
mem[start + i] = 0
elif op == op_GASPRICE:
stk.append(ext.tx_gasprice)
elif op == op_EXTCODESIZE:
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
stk.append(len(ext.get_code(addr) or b''))
elif op == op_EXTCODECOPY:
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
start, s2, size = stk.pop(), stk.pop(), stk.pop()
extcode = ext.get_code(addr) or b''
assert utils.is_string(extcode)
if not mem_extend(mem, compustate, op, start, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
for i in range(size):
if s2 + i < len(extcode):
mem[start + i] = utils.safe_ord(extcode[s2 + i])
else:
mem[start + i] = 0
elif op < 0x50:
if op == op_BLOCKHASH:
stk.append(utils.big_endian_to_int(ext.block_hash(stk.pop())))
elif op == op_COINBASE:
stk.append(utils.big_endian_to_int(ext.block_coinbase))
elif op == op_TIMESTAMP:
stk.append(ext.block_timestamp)
elif op == op_NUMBER:
stk.append(ext.block_number)
elif op == op_DIFFICULTY:
stk.append(ext.block_difficulty)
elif op == op_GASLIMIT:
stk.append(ext.block_gas_limit)
elif op < 0x60:
if op == op_POP:
stk.pop()
elif op == op_MLOAD:
s0 = stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
data = 0
for c in mem[s0: s0 + 32]:
data = (data << 8) + c
stk.append(data)
elif op == op_MSTORE:
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
v = s1
for i in range(31, -1, -1):
mem[s0 + i] = v % 256
v //= 256
elif op == op_MSTORE8:
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 1):
return vm_exception('OOG EXTENDING MEMORY')
mem[s0] = s1 % 256
elif op == op_SLOAD:
stk.append(ext.get_storage_data(msg.to, stk.pop()))
elif op == op_SSTORE:
s0, s1 = stk.pop(), stk.pop()
if ext.get_storage_data(msg.to, s0):
gascost = opcodes.GSTORAGEMOD if s1 else opcodes.GSTORAGEKILL
refund = 0 if s1 else opcodes.GSTORAGEREFUND
else:
gascost = opcodes.GSTORAGEADD if s1 else opcodes.GSTORAGEMOD
refund = 0
if compustate.gas < gascost:
return vm_exception('OUT OF GAS')
compustate.gas -= gascost
ext.add_refund(refund) # adds neg gascost as a refund if below zero
ext.set_storage_data(msg.to, s0, s1)
elif op == op_JUMP:
compustate.pc = stk.pop()
opnew = processed_code[compustate.pc][4] if \
compustate.pc in processed_code else op_STOP
if opnew != op_JUMPDEST:
return vm_exception('BAD JUMPDEST')
elif op == op_JUMPI:
s0, s1 = stk.pop(), stk.pop()
if s1:
compustate.pc = s0
opnew = processed_code[compustate.pc][4] if \
compustate.pc in processed_code else op_STOP
if opnew != op_JUMPDEST:
return vm_exception('BAD JUMPDEST')
elif op == op_PC:
stk.append(compustate.pc - 1)
elif op == op_MSIZE:
stk.append(len(mem))
elif op == op_GAS:
stk.append(compustate.gas) # AFTER subtracting cost 1
elif op_PUSH1 <= (op & 255) <= op_PUSH32:
# Hide push value in high-order bytes of op
stk.append(op >> 8)
elif op_DUP1 <= op <= op_DUP16:
depth = op - op_DUP1 + 1
stk.append(stk[-depth])
elif op_SWAP1 <= op <= op_SWAP16:
depth = op - op_SWAP1 + 1
temp = stk[-depth - 1]
stk[-depth - 1] = stk[-1]
stk[-1] = temp
elif op_LOG0 <= op <= op_LOG4:
"""
0xa0 ... 0xa4, 32/64/96/128/160 + len(data) gas
a. Opcodes LOG0...LOG4 are added, takes 2-6 stack arguments
MEMSTART MEMSZ (TOPIC1) (TOPIC2) (TOPIC3) (TOPIC4)
b. Logs are kept track of during tx execution exactly the same way as suicides
(except as an ordered list, not a set).
Each log is in the form [address, [topic1, ... ], data] where:
* address is what the ADDRESS opcode would output
* data is mem[MEMSTART: MEMSTART + MEMSZ]
* topics are as provided by the opcode
c. The ordered list of logs in the transaction are expressed as [log0, log1, ..., logN].
"""
depth = op - op_LOG0
mstart, msz = stk.pop(), stk.pop()
topics = [stk.pop() for x in range(depth)]
compustate.gas -= msz * opcodes.GLOGBYTE
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
data = b''.join(map(ascii_chr, mem[mstart: mstart + msz]))
ext.log(msg.to, topics, data)
log_log.trace('LOG', to=msg.to, topics=topics, data=list(map(utils.safe_ord, data)))
# print('LOG', msg.to, topics, list(map(ord, data)))
elif op == op_CREATE:
value, mstart, msz = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
cd = CallData(mem, mstart, msz)
create_msg = Message(msg.to, b'', value, compustate.gas, cd, msg.depth + 1)
o, gas, addr = ext.create(create_msg)
if o:
stk.append(utils.coerce_to_int(addr))
compustate.gas = gas
else:
stk.append(0)
compustate.gas = 0
else:
stk.append(0)
elif op == op_CALL:
gas, to, value, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, meminstart, meminsz) or \
not mem_extend(mem, compustate, op, memoutstart, memoutsz):
return vm_exception('OOG EXTENDING MEMORY')
to = utils.encode_int(to)
to = ((b'\x00' * (32 - len(to))) + to)[12:]
extra_gas = (not ext.account_exists(to)) * opcodes.GCALLNEWACCOUNT + \
(value > 0) * opcodes.GCALLVALUETRANSFER
submsg_gas = gas + opcodes.GSTIPEND * (value > 0)
if compustate.gas < gas + extra_gas:
return vm_exception('OUT OF GAS', needed=gas+extra_gas)
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
compustate.gas -= (gas + extra_gas)
cd = CallData(mem, meminstart, meminsz)
call_msg = Message(msg.to, to, value, submsg_gas, cd,
msg.depth + 1, code_address=to)
result, gas, data = ext.msg(call_msg)
if result == 0:
stk.append(0)
else:
stk.append(1)
compustate.gas += gas
for i in range(min(len(data), memoutsz)):
mem[memoutstart + i] = data[i]
else:
compustate.gas -= (gas + extra_gas - submsg_gas)
stk.append(0)
elif op == op_CALLCODE:
gas, to, value, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, meminstart, meminsz) or \
not mem_extend(mem, compustate, op, memoutstart, memoutsz):
return vm_exception('OOG EXTENDING MEMORY')
extra_gas = (value > 0) * opcodes.GCALLVALUETRANSFER
submsg_gas = gas + opcodes.GSTIPEND * (value > 0)
if compustate.gas < gas + extra_gas:
return vm_exception('OUT OF GAS', needed=gas+extra_gas)
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
compustate.gas -= (gas + extra_gas)
to = utils.encode_int(to)
to = ((b'\x00' * (32 - len(to))) + to)[12:]
cd = CallData(mem, meminstart, meminsz)
call_msg = Message(msg.to, msg.to, value, submsg_gas, cd,
msg.depth + 1, code_address=to)
result, gas, data = ext.msg(call_msg)
if result == 0:
stk.append(0)
else:
stk.append(1)
compustate.gas += gas
for i in range(min(len(data), memoutsz)):
mem[memoutstart + i] = data[i]
else:
compustate.gas -= (gas + extra_gas - submsg_gas)
stk.append(0)
elif op == op_RETURN:
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
return peaceful_exit('RETURN', compustate.gas, mem[s0: s0 + s1])
elif op == op_SUICIDE:
to = utils.encode_int(stk.pop())
to = ((b'\x00' * (32 - len(to))) + to)[12:]
xfer = ext.get_balance(msg.to)
ext.set_balance(to, ext.get_balance(to) + xfer)
ext.set_balance(msg.to, 0)
ext.add_suicide(msg.to)
# print('suiciding %s %s %d' % (msg.to, to, xfer))
return 1, compustate.gas, []
def decode_keyfile_json(raw_keyfile_json, password):
if not is_string(password):
password = to_string(password)
return eth_keyfile.decode_keyfile_json(raw_keyfile_json, password)
def encode_node(nd):
if is_string(nd):
return encode_hex(nd)
else:
return encode_hex(rlp.encode(nd))
def encode_single(typ, arg): # pylint: disable=too-many-return-statements,too-many-branches,too-many-statements,too-many-locals
""" Encode `arg` as `typ`.
`arg` will be encoded in a best effort manner, were necessary the function
will try to correctly define the underlying binary representation (ie.
decoding a hex-encoded address/hash).
Args:
typ (Tuple[(str, int, list)]): A 3-tuple defining the `arg` type.
The first element defines the type name.
The second element defines the type length in bits.
The third element defines if it's an array type.
Together the first and second defines the elementary type, the third
element must be present but is ignored.
Valid type names are:
- uint
- int
- bool
- ufixed
- fixed
- string
- bytes
- hash
- address
arg (object): The object to be encoded, it must be a python object
compatible with the `typ`.
Raises:
ValueError: when an invalid `typ` is supplied.
ValueOutOfBounds: when `arg` cannot be encoded as `typ` because of the
binary contraints.
Note:
This function don't work with array types, for that use the `enc`
function.
"""
base, sub, _ = typ
if base == 'uint':
sub = int(sub)
if not (0 < sub <= 256 and sub % 8 == 0):
raise ValueError(
'invalid unsigned integer bit length {}'.format(sub))
try:
i = decint(arg, signed=False)
except EncodingError:
# arg is larger than 2**256
raise ValueOutOfBounds(repr(arg))
if not 0 <= i < 2 ** sub:
raise ValueOutOfBounds(repr(arg))
value_encoded = int_to_big_endian(i)
return zpad(value_encoded, 32)
if base == 'int':
sub = int(sub)
bits = sub - 1
if not (0 < sub <= 256 and sub % 8 == 0):
raise ValueError('invalid integer bit length {}'.format(sub))
try:
i = decint(arg, signed=True)
except EncodingError:
# arg is larger than 2**255
raise ValueOutOfBounds(repr(arg))
if not -2 ** bits <= i < 2 ** bits:
raise ValueOutOfBounds(repr(arg))
value = i % 2 ** 256 # convert negative to "equivalent" positive
value_encoded = int_to_big_endian(value)
return zpad(value_encoded, 32)
if base == 'bool':
if arg is True:
value_encoded = int_to_big_endian(1)
elif arg is False:
value_encoded = int_to_big_endian(0)
else:
raise ValueError('%r is not bool' % arg)
return zpad(value_encoded, 32)
if base == 'ufixed':
sub = str(sub) # pylint: disable=redefined-variable-type
high_str, low_str = sub.split('x')
high = int(high_str)
low = int(low_str)
if not (0 < high + low <= 256 and high % 8 == 0 and low % 8 == 0):
raise ValueError('invalid unsigned fixed length {}'.format(sub))
if not 0 <= arg < 2 ** high:
raise ValueOutOfBounds(repr(arg))
float_point = arg * 2 ** low
fixed_point = int(float_point)
return zpad(int_to_big_endian(fixed_point), 32)
if base == 'fixed':
sub = str(sub) # pylint: disable=redefined-variable-type
high_str, low_str = sub.split('x')
high = int(high_str)
low = int(low_str)
bits = high - 1
if not (0 < high + low <= 256 and high % 8 == 0 and low % 8 == 0):
raise ValueError('invalid unsigned fixed length {}'.format(sub))
if not -2 ** bits <= arg < 2 ** bits:
raise ValueOutOfBounds(repr(arg))
float_point = arg * 2 ** low
fixed_point = int(float_point)
value = fixed_point % 2 ** 256
return zpad(int_to_big_endian(value), 32)
# Decimals
if base == 'decimal':
val_to_encode = int(arg * 10**int(sub))
return zpad(encode_int(val_to_encode % 2**256), 32)
if base == 'string':
if isinstance(arg, utils.unicode):
arg = arg.encode('utf8')
else:
try:
arg.decode('utf8')
except UnicodeDecodeError:
raise ValueError('string must be utf8 encoded')
if len(sub): # fixed length
if not 0 <= len(arg) <= int(sub):
raise ValueError('invalid string length {}'.format(sub))
if not 0 <= int(sub) <= 32:
raise ValueError('invalid string length {}'.format(sub))
return rzpad(arg, 32)
if not 0 <= len(arg) < TT256:
raise Exception('Integer invalid or out of range: %r' % arg)
length_encoded = zpad(int_to_big_endian(len(arg)), 32)
value_encoded = rzpad(arg, utils.ceil32(len(arg)))
return length_encoded + value_encoded
if base == 'bytes':
if not is_string(arg):
if isinstance(arg, str):
arg = bytes(arg, 'utf8')
else:
raise EncodingError('Expecting string: %r' % arg)
arg = utils.to_string(arg) # py2: force unicode into str
if len(sub): # fixed length
if not 0 <= len(arg) <= int(sub):
raise ValueError('string must be utf8 encoded')
if not 0 <= int(sub) <= 32:
raise ValueError('string must be utf8 encoded')
return rzpad(arg, 32)
if not 0 <= len(arg) < TT256:
raise Exception('Integer invalid or out of range: %r' % arg)
length_encoded = zpad(int_to_big_endian(len(arg)), 32)
value_encoded = rzpad(arg, utils.ceil32(len(arg)))
return length_encoded + value_encoded
if base == 'hash':
if not (int(sub) and int(sub) <= 32):
raise EncodingError('too long: %r' % arg)
if is_numeric(arg):
return zpad(encode_int(arg), 32)
if len(arg) == int(sub):
return zpad(arg, 32)
if len(arg) == int(sub) * 2:
return zpad(decode_hex(arg), 32)
raise EncodingError('Could not parse hash: %r' % arg)
if base == 'address':
assert sub == ''
if is_numeric(arg):
return zpad(encode_int(arg), 32)
if len(arg) == 20:
return zpad(arg, 32)
if len(arg) == 40:
return zpad(decode_hex(arg), 32)
if len(arg) == 42 and arg[:2] == '0x':
return zpad(decode_hex(arg[2:]), 32)
raise EncodingError('Could not parse address: %r' % arg)
raise EncodingError('Unhandled type: %r %r' % (base, sub))
def fetch_hashchain(self):
log_st.debug('fetching hashchain')
blockhashes_chain = [self.blockhash] # youngest to oldest
# For testing purposes: skip the hash downoading stage
# import ast
# blockhashes_chain = ast.literal_eval(open('/home/vub/blockhashes.pyast').read())[:299000]
blockhash = self.blockhash = blockhashes_chain[-1]
assert blockhash not in self.chain
# get block hashes until we found a known one
max_blockhashes_per_request = self.initial_blockhashes_per_request
while blockhash not in self.chain:
# proto with highest_difficulty should be the proto we got the newblock from
blockhashes_batch = []
# try with protos
protocols = self.protocols
if not protocols:
log_st.warn('no protocols available')
return self.exit(success=False)
for proto in protocols:
log.debug('syncing with', proto=proto)
if proto.is_stopped:
continue
# request
assert proto not in self.requests
deferred = AsyncResult()
self.requests[proto] = deferred
proto.send_getblockhashes(blockhash,
max_blockhashes_per_request)
try:
blockhashes_batch = deferred.get(
block=True, timeout=self.blockhashes_request_timeout)
except gevent.Timeout:
log_st.warn('syncing hashchain timed out')
continue
finally:
# is also executed 'on the way out' when any other clause of the try statement
# is left via a break, continue or return statement.
del self.requests[proto]
if not blockhashes_batch:
log_st.warn('empty getblockhashes result')
continue
if not all(isinstance(bh, bytes) for bh in blockhashes_batch):
log_st.warn('got wrong data type',
expected='bytes',
received=type(blockhashes_batch[0]))
continue
break
if not blockhashes_batch:
log_st.warn('syncing failed with all peers',
num_protos=len(protocols))
return self.exit(success=False)
for blockhash in blockhashes_batch: # youngest to oldest
assert utils.is_string(blockhash)
if blockhash not in self.chain:
blockhashes_chain.append(blockhash)
else:
log_st.debug(
'found known blockhash',
blockhash=utils.encode_hex(blockhash),
is_genesis=bool(blockhash == self.chain.genesis.hash))
break
log_st.debug('downloaded ' + str(len(blockhashes_chain)) +
' block hashes, ending with %s' %
utils.encode_hex(blockhashes_chain[-1]))
max_blockhashes_per_request = self.max_blockhashes_per_request
self.fetch_blocks(blockhashes_chain)
def vm_execute(ext, msg, code):
# precompute trace flag
# if we trace vm, we're in slow mode anyway
trace_vm = log_vm_op.is_active('trace')
compustate = Compustate(gas=msg.gas)
stk = compustate.stack
mem = compustate.memory
processed_code = preprocess_code(code)
codelen = len(processed_code)
op = None
steps = 0
_prevop = None # for trace only
while 1:
# stack size limit error
if compustate.pc >= codelen:
return peaceful_exit('CODE OUT OF RANGE', compustate.gas, [])
op, in_args, out_args, fee, opcode, pushval = \
processed_code[compustate.pc]
# out of gas error
if fee > compustate.gas:
return vm_exception('OUT OF GAS')
# empty stack error
if in_args > len(compustate.stack):
return vm_exception('INSUFFICIENT STACK',
op=op, needed=to_string(in_args),
available=to_string(len(compustate.stack)))
if len(compustate.stack) - in_args + out_args > 1024:
return vm_exception('STACK SIZE LIMIT EXCEEDED',
op=op,
pre_height=to_string(len(compustate.stack)))
# Apply operation
compustate.gas -= fee
compustate.pc += 1
if trace_vm:
"""
This diverges from normal logging, as we use the logging namespace
only to decide which features get logged in 'eth.vm.op'
i.e. tracing can not be activated by activating a sub
like 'eth.vm.op.stack'
"""
trace_data = {}
trace_data['stack'] = list(map(to_string, list(compustate.stack)))
if _prevop in ('MLOAD', 'MSTORE', 'MSTORE8', 'SHA3', 'CALL',
'CALLCODE', 'CREATE', 'CALLDATACOPY', 'CODECOPY',
'EXTCODECOPY'):
if len(compustate.memory) < 1024:
trace_data['memory'] = \
b''.join([encode_hex(ascii_chr(x)) for x
in compustate.memory])
else:
trace_data['sha3memory'] = \
encode_hex(utils.sha3(''.join([ascii_chr(x) for
x in compustate.memory])))
if _prevop in ('SSTORE', 'SLOAD') or steps == 0:
trace_data['storage'] = ext.log_storage(msg.to)
trace_data['gas'] = to_string(compustate.gas + fee)
trace_data['inst'] = opcode
trace_data['pc'] = to_string(compustate.pc - 1)
if steps == 0:
trace_data['depth'] = msg.depth
trace_data['address'] = msg.to
trace_data['op'] = op
trace_data['steps'] = steps
if op[:4] == 'PUSH':
trace_data['pushvalue'] = pushval
log_vm_op.trace('vm', **trace_data)
steps += 1
_prevop = op
# Invalid operation
if op == 'INVALID':
return vm_exception('INVALID OP', opcode=opcode)
# Valid operations
if opcode < 0x10:
if op == 'STOP':
return peaceful_exit('STOP', compustate.gas, [])
elif op == 'ADD':
stk.append((stk.pop() + stk.pop()) & TT256M1)
elif op == 'SUB':
stk.append((stk.pop() - stk.pop()) & TT256M1)
elif op == 'MUL':
stk.append((stk.pop() * stk.pop()) & TT256M1)
elif op == 'DIV':
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 // s1)
elif op == 'MOD':
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 % s1)
elif op == 'SDIV':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(stk.pop())
stk.append(0 if s1 == 0 else (abs(s0) // abs(s1) *
(-1 if s0 * s1 < 0 else 1)) & TT256M1)
elif op == 'SMOD':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(stk.pop())
stk.append(0 if s1 == 0 else (abs(s0) % abs(s1) *
(-1 if s0 < 0 else 1)) & TT256M1)
elif op == 'ADDMOD':
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 + s1) % s2 if s2 else 0)
elif op == 'MULMOD':
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 * s1) % s2 if s2 else 0)
elif op == 'EXP':
base, exponent = stk.pop(), stk.pop()
# fee for exponent is dependent on its bytes
# calc n bytes to represent exponent
nbytes = len(utils.encode_int(exponent))
expfee = nbytes * opcodes.GEXPONENTBYTE
if compustate.gas < expfee:
compustate.gas = 0
return vm_exception('OOG EXPONENT')
compustate.gas -= expfee
stk.append(pow(base, exponent, TT256))
elif op == 'SIGNEXTEND':
s0, s1 = stk.pop(), stk.pop()
if s0 <= 31:
testbit = s0 * 8 + 7
if s1 & (1 << testbit):
stk.append(s1 | (TT256 - (1 << testbit)))
else:
stk.append(s1 & ((1 << testbit) - 1))
else:
stk.append(s1)
elif opcode < 0x20:
if op == 'LT':
stk.append(1 if stk.pop() < stk.pop() else 0)
elif op == 'GT':
stk.append(1 if stk.pop() > stk.pop() else 0)
elif op == 'SLT':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(stk.pop())
stk.append(1 if s0 < s1 else 0)
elif op == 'SGT':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(stk.pop())
stk.append(1 if s0 > s1 else 0)
elif op == 'EQ':
stk.append(1 if stk.pop() == stk.pop() else 0)
elif op == 'ISZERO':
stk.append(0 if stk.pop() else 1)
elif op == 'AND':
stk.append(stk.pop() & stk.pop())
elif op == 'OR':
stk.append(stk.pop() | stk.pop())
elif op == 'XOR':
stk.append(stk.pop() ^ stk.pop())
elif op == 'NOT':
stk.append(TT256M1 - stk.pop())
elif op == 'BYTE':
s0, s1 = stk.pop(), stk.pop()
if s0 >= 32:
stk.append(0)
else:
stk.append((s1 // 256 ** (31 - s0)) % 256)
elif opcode < 0x40:
if op == 'SHA3':
s0, s1 = stk.pop(), stk.pop()
compustate.gas -= opcodes.GSHA3WORD * (utils.ceil32(s1) // 32)
if compustate.gas < 0:
return vm_exception('OOG PAYING FOR SHA3')
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
data = b''.join(map(ascii_chr, mem[s0: s0 + s1]))
stk.append(utils.big_endian_to_int(utils.sha3(data)))
elif op == 'ADDRESS':
stk.append(utils.coerce_to_int(msg.to))
elif op == 'BALANCE':
# EIP150: Increase the gas cost of BALANCE to 400
if ext.post_anti_dos_hardfork:
if not eat_gas(compustate, opcodes.BALANCE_SUPPLEMENTAL_GAS):
return vm_exception("OUT OF GAS")
addr = utils.coerce_addr_to_hex(stk.pop() % 2 ** 160)
stk.append(ext.get_balance(addr))
elif op == 'ORIGIN':
stk.append(utils.coerce_to_int(ext.tx_origin))
elif op == 'CALLER':
stk.append(utils.coerce_to_int(msg.sender))
elif op == 'CALLVALUE':
stk.append(msg.value)
elif op == 'CALLDATALOAD':
stk.append(msg.data.extract32(stk.pop()))
elif op == 'CALLDATASIZE':
stk.append(msg.data.size)
elif op == 'CALLDATACOPY':
mstart, dstart, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
msg.data.extract_copy(mem, mstart, dstart, size)
elif op == 'CODESIZE':
stk.append(len(processed_code))
elif op == 'CODECOPY':
start, s1, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, start, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
for i in range(size):
if s1 + i < len(processed_code):
mem[start + i] = processed_code[s1 + i][4]
else:
mem[start + i] = 0
elif op == 'GASPRICE':
stk.append(ext.tx_gasprice)
elif op == 'EXTCODESIZE':
# EIP150: Increase the gas cost of EXTCODESIZE to 700
if ext.post_anti_dos_hardfork:
if not eat_gas(compustate, opcodes.EXTCODELOAD_SUPPLEMENTAL_GAS):
return vm_exception("OUT OF GAS")
addr = utils.coerce_addr_to_hex(stk.pop() % 2 ** 160)
stk.append(len(ext.get_code(addr) or b''))
elif op == 'EXTCODECOPY':
# EIP150: Increase the base gas cost of EXTCODECOPY to 700
if ext.post_anti_dos_hardfork:
if not eat_gas(compustate, opcodes.EXTCODELOAD_SUPPLEMENTAL_GAS):
return vm_exception("OUT OF GAS")
addr = utils.coerce_addr_to_hex(stk.pop() % 2 ** 160)
start, s2, size = stk.pop(), stk.pop(), stk.pop()
extcode = ext.get_code(addr) or b''
assert utils.is_string(extcode)
if not mem_extend(mem, compustate, op, start, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
for i in range(size):
if s2 + i < len(extcode):
mem[start + i] = utils.safe_ord(extcode[s2 + i])
else:
mem[start + i] = 0
elif opcode < 0x50:
if op == 'BLOCKHASH':
stk.append(utils.big_endian_to_int(ext.block_hash(stk.pop())))
elif op == 'COINBASE':
stk.append(utils.big_endian_to_int(ext.block_coinbase))
elif op == 'TIMESTAMP':
stk.append(ext.block_timestamp)
elif op == 'NUMBER':
stk.append(ext.block_number)
elif op == 'DIFFICULTY':
stk.append(ext.block_difficulty)
elif op == 'GASLIMIT':
stk.append(ext.block_gas_limit)
elif opcode < 0x60:
if op == 'POP':
stk.pop()
elif op == 'MLOAD':
s0 = stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
data = b''.join(map(ascii_chr, mem[s0: s0 + 32]))
stk.append(utils.big_endian_to_int(data))
elif op == 'MSTORE':
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
v = s1
for i in range(31, -1, -1):
mem[s0 + i] = v % 256
v //= 256
elif op == 'MSTORE8':
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 1):
return vm_exception('OOG EXTENDING MEMORY')
mem[s0] = s1 % 256
elif op == 'SLOAD':
# EIP150: Increase the gas cost of SLOAD to 200
if ext.post_anti_dos_hardfork:
if not eat_gas(compustate, opcodes.SLOAD_SUPPLEMENTAL_GAS):
return vm_exception("OUT OF GAS")
stk.append(ext.get_storage_data(msg.to, stk.pop()))
elif op == 'SSTORE':
s0, s1 = stk.pop(), stk.pop()
if ext.get_storage_data(msg.to, s0):
gascost = opcodes.GSTORAGEMOD if s1 else opcodes.GSTORAGEKILL
refund = 0 if s1 else opcodes.GSTORAGEREFUND
else:
gascost = opcodes.GSTORAGEADD if s1 else opcodes.GSTORAGEMOD
refund = 0
if compustate.gas < gascost:
return vm_exception('OUT OF GAS')
compustate.gas -= gascost
ext.add_refund(refund) # adds neg gascost as a refund if below zero
ext.set_storage_data(msg.to, s0, s1)
elif op == 'JUMP':
compustate.pc = stk.pop()
opnew = processed_code[compustate.pc][0] if \
compustate.pc < len(processed_code) else 'STOP'
if opnew != 'JUMPDEST':
return vm_exception('BAD JUMPDEST')
elif op == 'JUMPI':
s0, s1 = stk.pop(), stk.pop()
if s1:
compustate.pc = s0
opnew = processed_code[compustate.pc][0] if \
compustate.pc < len(processed_code) else 'STOP'
if opnew != 'JUMPDEST':
return vm_exception('BAD JUMPDEST')
elif op == 'PC':
stk.append(compustate.pc - 1)
elif op == 'MSIZE':
stk.append(len(mem))
elif op == 'GAS':
stk.append(compustate.gas) # AFTER subtracting cost 1
elif op[:4] == 'PUSH':
pushnum = int(op[4:])
compustate.pc += pushnum
stk.append(pushval)
elif op[:3] == 'DUP':
depth = int(op[3:])
stk.append(stk[-depth])
elif op[:4] == 'SWAP':
depth = int(op[4:])
temp = stk[-depth - 1]
stk[-depth - 1] = stk[-1]
stk[-1] = temp
elif op[:3] == 'LOG':
"""
0xa0 ... 0xa4, 32/64/96/128/160 + len(data) gas
a. Opcodes LOG0...LOG4 are added, takes 2-6 stack arguments
MEMSTART MEMSZ (TOPIC1) (TOPIC2) (TOPIC3) (TOPIC4)
b. Logs are kept track of during tx execution exactly the same way as suicides
(except as an ordered list, not a set).
Each log is in the form [address, [topic1, ... ], data] where:
* address is what the ADDRESS opcode would output
* data is mem[MEMSTART: MEMSTART + MEMSZ]
* topics are as provided by the opcode
c. The ordered list of logs in the transaction are expressed as [log0, log1, ..., logN].
"""
depth = int(op[3:])
mstart, msz = stk.pop(), stk.pop()
topics = [stk.pop() for x in range(depth)]
compustate.gas -= msz * opcodes.GLOGBYTE
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
data = b''.join(map(ascii_chr, mem[mstart: mstart + msz]))
ext.log(msg.to, topics, data)
log_log.trace('LOG', to=msg.to, topics=topics, data=list(map(utils.safe_ord, data)))
# print('LOG', msg.to, topics, list(map(ord, data)))
elif op == 'CREATE':
value, mstart, msz = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
cd = CallData(mem, mstart, msz)
ingas = compustate.gas
# EIP150(1b) CREATE only provides all but one 64th of the
# parent gas to the child call
if ext.post_anti_dos_hardfork:
ingas = max_call_gas(ingas)
create_msg = Message(msg.to, b'', value, ingas, cd, msg.depth + 1)
o, gas, addr = ext.create(create_msg)
if o:
stk.append(utils.coerce_to_int(addr))
compustate.gas -= (ingas - gas)
else:
stk.append(0)
compustate.gas -= ingas
else:
stk.append(0)
elif op == 'CALL':
gas, to, value, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, meminstart, meminsz) or \
not mem_extend(mem, compustate, op, memoutstart, memoutsz):
return vm_exception('OOG EXTENDING MEMORY')
to = utils.encode_int(to)
to = ((b'\x00' * (32 - len(to))) + to)[12:]
extra_gas = (not ext.account_exists(to)) * opcodes.GCALLNEWACCOUNT + \
(value > 0) * opcodes.GCALLVALUETRANSFER + \
ext.post_anti_dos_hardfork * opcodes.CALL_SUPPLEMENTAL_GAS
# ^ EIP150 Increase the gas cost of CALL to 700
if ext.post_anti_dos_hardfork:
# EIP150(1b) if a call asks for more gas than all but one 64th of
# the maximum allowed amount, call with all but one 64th of the
# maximum allowed amount of gas
if compustate.gas < extra_gas:
return vm_exception('OUT OF GAS', needed=extra_gas)
gas = min(gas, max_call_gas(compustate.gas - extra_gas))
else:
if compustate.gas < gas + extra_gas:
return vm_exception('OUT OF GAS', needed=gas + extra_gas)
submsg_gas = gas + opcodes.GSTIPEND * (value > 0)
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
compustate.gas -= (gas + extra_gas)
cd = CallData(mem, meminstart, meminsz)
call_msg = Message(msg.to, to, value, submsg_gas, cd,
msg.depth + 1, code_address=to)
result, gas, data = ext.msg(call_msg)
if result == 0:
stk.append(0)
else:
stk.append(1)
compustate.gas += gas
for i in range(min(len(data), memoutsz)):
mem[memoutstart + i] = data[i]
else:
compustate.gas -= (gas + extra_gas - submsg_gas)
stk.append(0)
elif op == 'CALLCODE' or op == 'DELEGATECALL':
if op == 'CALLCODE':
gas, to, value, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
else:
gas, to, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
value = 0
if not mem_extend(mem, compustate, op, meminstart, meminsz) or \
not mem_extend(mem, compustate, op, memoutstart, memoutsz):
return vm_exception('OOG EXTENDING MEMORY')
extra_gas = (value > 0) * opcodes.GCALLVALUETRANSFER + \
ext.post_anti_dos_hardfork * opcodes.CALL_SUPPLEMENTAL_GAS
# ^ EIP150 Increase the gas cost of CALLCODE, DELEGATECALL to 700
if ext.post_anti_dos_hardfork:
# EIP150(1b) if a call asks for more gas than all but one 64th of
# the maximum allowed amount, call with all but one 64th of the
# maximum allowed amount of gas
if compustate.gas < extra_gas:
return vm_exception('OUT OF GAS', needed=extra_gas)
gas = min(gas, max_call_gas(compustate.gas - extra_gas))
else:
if compustate.gas < gas + extra_gas:
return vm_exception('OUT OF GAS', needed=gas + extra_gas)
submsg_gas = gas + opcodes.GSTIPEND * (value > 0)
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
compustate.gas -= (gas + extra_gas)
to = utils.encode_int(to)
to = ((b'\x00' * (32 - len(to))) + to)[12:]
cd = CallData(mem, meminstart, meminsz)
if ext.post_homestead_hardfork and op == 'DELEGATECALL':
call_msg = Message(msg.sender, msg.to, msg.value, submsg_gas, cd,
msg.depth + 1, code_address=to, transfers_value=False)
elif op == 'DELEGATECALL':
return vm_exception('OPCODE INACTIVE')
else:
call_msg = Message(msg.to, msg.to, value, submsg_gas, cd,
msg.depth + 1, code_address=to)
result, gas, data = ext.msg(call_msg)
if result == 0:
stk.append(0)
else:
stk.append(1)
compustate.gas += gas
for i in range(min(len(data), memoutsz)):
mem[memoutstart + i] = data[i]
else:
compustate.gas -= (gas + extra_gas - submsg_gas)
stk.append(0)
elif op == 'RETURN':
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
return peaceful_exit('RETURN', compustate.gas, mem[s0: s0 + s1])
elif op == 'SUICIDE':
to = utils.encode_int(stk.pop())
to = ((b'\x00' * (32 - len(to))) + to)[12:]
if ext.post_anti_dos_hardfork:
# EIP150 Increase the gas cost of SUICIDE to 5000
extra_gas = opcodes.SUICIDE_SUPPLEMENTAL_GAS + \
(not ext.account_exists(to)) * opcodes.GCALLNEWACCOUNT
# ^ EIP150(1c) If SUICIDE hits a newly created account, it
# triggers an additional gas cost of 25000 (similar to CALLs)
if not eat_gas(compustate, extra_gas):
return vm_exception("OUT OF GAS")
xfer = ext.get_balance(msg.to)
ext.set_balance(to, ext.get_balance(to) + xfer)
ext.set_balance(msg.to, 0)
ext.add_suicide(msg.to)
# print('suiciding %s %s %d' % (msg.to, to, xfer))
return 1, compustate.gas, []
def encode_node(nd):
if is_string(nd):
return encode_hex(nd)
else:
return encode_hex(rlp_encode(nd))
def has_block(self, blockhash):
assert is_string(blockhash)
assert len(blockhash) == 32
return blockhash in self.blockchain
def get(self, blockhash):
assert is_string(blockhash)
assert len(blockhash) == 32
return blocks.get_block(self.env, blockhash)
def has_block(self, blockhash):
assert is_string(blockhash)
assert len(blockhash) == 32
return blockhash in self.blockchain
def __init__(self, contract_interface):
if is_string(contract_interface):
contract_interface = json_decode(contract_interface)
self.constructor_data = None
self.function_data = {}
self.event_data = {}
for description in contract_interface:
encode_types = [
element['type']
for element in description['inputs']
]
signature = [
(element['type'], element['name'])
for element in description['inputs']
]
# type can be omitted, defaulting to function
if description.get('type', 'function') == 'function':
normalized_name = _normalize_name(description['name'])
decode_types = [
element['type']
for element in description['outputs']
]
self.function_data[normalized_name] = {
'prefix': method_id(normalized_name, encode_types),
'encode_types': encode_types,
'decode_types': decode_types,
'is_constant': description.get('constant', False),
'signature': signature,
}
elif description['type'] == 'event':
normalized_name = _normalize_name(description['name'])
indexed = [
element['indexed']
for element in description['inputs']
]
names = [
element['name']
for element in description['inputs']
]
self.event_data[event_id(normalized_name, encode_types)] = {
'types': encode_types,
'name': normalized_name,
'names': names,
'indexed': indexed,
'anonymous': description.get('anonymous', False),
}
elif description['type'] == 'constructor':
if self.constructor_data is not None:
raise ValueError('Only one constructor is supported.')
self.constructor_data = {
'encode_types': encode_types,
'signature': signature,
}
else:
raise ValueError('Unknown type {}'.format(description['type']))
def snapshot_form(val):
if is_numeric(val):
return str(val)
elif is_string(val):
return '0x' + encode_hex(val)
def get(self, blockhash):
assert is_string(blockhash)
assert len(blockhash) == 32
return blocks.get_block(self.blockchain, blockhash)
def vm_execute(ext, msg, code):
# precompute trace flag
# if we trace vm, we're in slow mode anyway
trace_vm = log_vm_op.is_active('trace')
compustate = Compustate(gas=msg.gas)
stk = compustate.stack
mem = compustate.memory
if code in code_cache:
processed_code = code_cache[code]
else:
processed_code = preprocess_code(code)
code_cache[code] = processed_code
# print(processed_code.keys(), code)
codelen = len(code)
s = time.time()
steps = 0
_prevop = None # for trace only
while compustate.pc in processed_code:
ops, minstack, maxstack, totgas, nextpos = processed_code[
compustate.pc]
if len(compustate.stack) < minstack:
return vm_exception('INSUFFICIENT STACK')
if len(compustate.stack) > maxstack:
return vm_exception('STACK SIZE LIMIT EXCEEDED')
if totgas > compustate.gas:
return vm_exception('OUT OF GAS %d %d' % (totgas, compustate.gas))
jumped = False
compustate.gas -= totgas
compustate.pc = nextpos
# Invalid operation; can only come at the end of a chunk
if ops[-1][0] == 'INVALID':
return vm_exception('INVALID OP', opcode=ops[-1][1])
for op, opcode, pushval in ops:
if trace_vm:
"""
This diverges from normal logging, as we use the logging namespace
only to decide which features get logged in 'eth.vm.op'
i.e. tracing can not be activated by activating a sub
like 'eth.vm.op.stack'
"""
trace_data = {}
trace_data['stack'] = list(
map(to_string, list(compustate.stack)))
if _prevop in ('MLOAD', 'MSTORE', 'MSTORE8', 'SHA3', 'CALL',
'CALLCODE', 'CREATE', 'CALLDATACOPY',
'CODECOPY', 'EXTCODECOPY'):
if len(compustate.memory) < 1024:
trace_data['memory'] = \
''.join([encode_hex(ascii_chr(x)) for x
in compustate.memory])
else:
trace_data['sha3memory'] = \
encode_hex(utils.sha3(b''.join([ascii_chr(x) for
x in compustate.memory])))
if _prevop in ('SSTORE', ) or steps == 0:
trace_data['storage'] = ext.log_storage(msg.to)
trace_data['gas'] = to_string(compustate.gas + totgas)
trace_data['inst'] = opcode
trace_data['pc'] = to_string(compustate.pc - 1)
if steps == 0:
trace_data['depth'] = msg.depth
trace_data['address'] = msg.to
trace_data['steps'] = steps
trace_data['depth'] = msg.depth
if op[:4] == 'PUSH':
trace_data['pushvalue'] = pushval
log_vm_op.trace('vm', op=op, **trace_data)
steps += 1
_prevop = op
# Valid operations
# Pushes first because they are very frequent
if 0x60 <= opcode <= 0x7f:
# compustate.pc += opcode - 0x5f # Move 1 byte forward for
# 0x60, up to 32 bytes for 0x7f
stk.append(pushval)
elif opcode < 0x10:
if op == 'STOP':
return peaceful_exit('STOP', compustate.gas, [])
elif op == 'ADD':
stk.append((stk.pop() + stk.pop()) & TT256M1)
elif op == 'SUB':
stk.append((stk.pop() - stk.pop()) & TT256M1)
elif op == 'MUL':
stk.append((stk.pop() * stk.pop()) & TT256M1)
elif op == 'DIV':
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 // s1)
elif op == 'MOD':
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 % s1)
elif op == 'SDIV':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(0 if s1 == 0 else (abs(s0) // abs(s1) *
(-1 if s0 * s1 < 0 else 1))
& TT256M1)
elif op == 'SMOD':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(0 if s1 == 0 else (abs(s0) % abs(s1) *
(-1 if s0 < 0 else 1))
& TT256M1)
elif op == 'ADDMOD':
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 + s1) % s2 if s2 else 0)
elif op == 'MULMOD':
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 * s1) % s2 if s2 else 0)
elif op == 'EXP':
base, exponent = stk.pop(), stk.pop()
# fee for exponent is dependent on its bytes
# calc n bytes to represent exponent
nbytes = len(utils.encode_int(exponent))
expfee = nbytes * opcodes.GEXPONENTBYTE
if ext.post_clearing_hardfork():
expfee += opcodes.EXP_SUPPLEMENTAL_GAS * nbytes
if compustate.gas < expfee:
compustate.gas = 0
return vm_exception('OOG EXPONENT')
compustate.gas -= expfee
stk.append(pow(base, exponent, TT256))
elif op == 'SIGNEXTEND':
s0, s1 = stk.pop(), stk.pop()
if s0 <= 31:
testbit = s0 * 8 + 7
if s1 & (1 << testbit):
stk.append(s1 | (TT256 - (1 << testbit)))
else:
stk.append(s1 & ((1 << testbit) - 1))
else:
stk.append(s1)
elif opcode < 0x20:
if op == 'LT':
stk.append(1 if stk.pop() < stk.pop() else 0)
elif op == 'GT':
stk.append(1 if stk.pop() > stk.pop() else 0)
elif op == 'SLT':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(1 if s0 < s1 else 0)
elif op == 'SGT':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(1 if s0 > s1 else 0)
elif op == 'EQ':
stk.append(1 if stk.pop() == stk.pop() else 0)
elif op == 'ISZERO':
stk.append(0 if stk.pop() else 1)
elif op == 'AND':
stk.append(stk.pop() & stk.pop())
elif op == 'OR':
stk.append(stk.pop() | stk.pop())
elif op == 'XOR':
stk.append(stk.pop() ^ stk.pop())
elif op == 'NOT':
stk.append(TT256M1 - stk.pop())
elif op == 'BYTE':
s0, s1 = stk.pop(), stk.pop()
if s0 >= 32:
stk.append(0)
else:
stk.append((s1 // 256**(31 - s0)) % 256)
elif opcode < 0x40:
if op == 'SHA3':
s0, s1 = stk.pop(), stk.pop()
compustate.gas -= opcodes.GSHA3WORD * \
(utils.ceil32(s1) // 32)
if compustate.gas < 0:
return vm_exception('OOG PAYING FOR SHA3')
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
data = bytearray_to_bytestr(mem[s0:s0 + s1])
stk.append(utils.big_endian_to_int(utils.sha3(data)))
elif op == 'ADDRESS':
stk.append(utils.coerce_to_int(msg.to))
elif op == 'BALANCE':
if ext.post_anti_dos_hardfork():
if not eat_gas(compustate,
opcodes.BALANCE_SUPPLEMENTAL_GAS):
return vm_exception("OUT OF GAS")
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
stk.append(ext.get_balance(addr))
elif op == 'ORIGIN':
stk.append(utils.coerce_to_int(ext.tx_origin))
elif op == 'CALLER':
stk.append(utils.coerce_to_int(msg.sender))
elif op == 'CALLVALUE':
stk.append(msg.value)
elif op == 'CALLDATALOAD':
stk.append(msg.data.extract32(stk.pop()))
elif op == 'CALLDATASIZE':
stk.append(msg.data.size)
elif op == 'CALLDATACOPY':
mstart, dstart, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
msg.data.extract_copy(mem, mstart, dstart, size)
elif op == 'CODESIZE':
stk.append(len(code))
elif op == 'CODECOPY':
mstart, dstart, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
for i in range(size):
if dstart + i < len(code):
mem[mstart + i] = utils.safe_ord(code[dstart + i])
else:
mem[mstart + i] = 0
elif op == 'RETURNDATACOPY':
mstart, dstart, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
if dstart + size > len(compustate.last_returned):
return vm_exception('RETURNDATACOPY out of range')
mem[mstart:mstart + size] = compustate.last_returned
elif op == 'RETURNDATASIZE':
stk.append(len(compustate.last_returned))
elif op == 'GASPRICE':
stk.append(ext.tx_gasprice)
elif op == 'EXTCODESIZE':
if ext.post_anti_dos_hardfork():
if not eat_gas(compustate,
opcodes.EXTCODELOAD_SUPPLEMENTAL_GAS):
return vm_exception("OUT OF GAS")
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
stk.append(len(ext.get_code(addr) or b''))
elif op == 'EXTCODECOPY':
if ext.post_anti_dos_hardfork():
if not eat_gas(compustate,
opcodes.EXTCODELOAD_SUPPLEMENTAL_GAS):
return vm_exception("OUT OF GAS")
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
start, s2, size = stk.pop(), stk.pop(), stk.pop()
extcode = ext.get_code(addr) or b''
assert utils.is_string(extcode)
if not mem_extend(mem, compustate, op, start, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
for i in range(size):
if s2 + i < len(extcode):
mem[start + i] = utils.safe_ord(extcode[s2 + i])
else:
mem[start + i] = 0
elif opcode < 0x50:
if op == 'BLOCKHASH':
if ext.post_metropolis_hardfork() and False:
bh_addr = ext.blockhash_store
stk.append(ext.get_storage_data(bh_addr, stk.pop()))
else:
stk.append(
utils.big_endian_to_int(ext.block_hash(stk.pop())))
elif op == 'COINBASE':
stk.append(utils.big_endian_to_int(ext.block_coinbase))
elif op == 'TIMESTAMP':
stk.append(ext.block_timestamp)
elif op == 'NUMBER':
stk.append(ext.block_number)
elif op == 'DIFFICULTY':
stk.append(ext.block_difficulty)
elif op == 'GASLIMIT':
stk.append(ext.block_gas_limit)
elif opcode < 0x60:
if op == 'POP':
stk.pop()
elif op == 'MLOAD':
s0 = stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
stk.append(utils.bytes_to_int(mem[s0:s0 + 32]))
elif op == 'MSTORE':
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
mem[s0:s0 + 32] = utils.encode_int32(s1)
elif op == 'MSTORE8':
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 1):
return vm_exception('OOG EXTENDING MEMORY')
mem[s0] = s1 % 256
elif op == 'SLOAD':
if ext.post_anti_dos_hardfork():
if not eat_gas(compustate,
opcodes.SLOAD_SUPPLEMENTAL_GAS):
return vm_exception("OUT OF GAS")
stk.append(ext.get_storage_data(msg.to, stk.pop()))
elif op == 'SSTORE':
s0, s1 = stk.pop(), stk.pop()
if msg.static:
return vm_exception(
'Cannot SSTORE inside a static context')
if ext.get_storage_data(msg.to, s0):
gascost = opcodes.GSTORAGEMOD if s1 else opcodes.GSTORAGEKILL
refund = 0 if s1 else opcodes.GSTORAGEREFUND
else:
gascost = opcodes.GSTORAGEADD if s1 else opcodes.GSTORAGEMOD
refund = 0
if compustate.gas < gascost:
return vm_exception('OUT OF GAS')
compustate.gas -= gascost
# adds neg gascost as a refund if below zero
ext.add_refund(refund)
ext.set_storage_data(msg.to, s0, s1)
elif op == 'JUMP':
compustate.pc = stk.pop()
opnew = code[
compustate.pc] if compustate.pc < codelen else 0
jumped = True
if opnew != JUMPDEST:
return vm_exception('BAD JUMPDEST')
elif op == 'JUMPI':
s0, s1 = stk.pop(), stk.pop()
if s1:
compustate.pc = s0
opnew = code[
compustate.pc] if compustate.pc < codelen else 0
jumped = True
if opnew != JUMPDEST:
return vm_exception('BAD JUMPDEST')
elif op == 'PC':
stk.append(compustate.pc - 1)
elif op == 'MSIZE':
stk.append(len(mem))
elif op == 'GAS':
stk.append(compustate.gas) # AFTER subtracting cost 1
elif op[:3] == 'DUP':
# 0x7f - opcode is a negative number, -1 for 0x80 ... -16 for
# 0x8f
stk.append(stk[0x7f - opcode])
elif op[:4] == 'SWAP':
# 0x8e - opcode is a negative number, -2 for 0x90 ... -17 for
# 0x9f
temp = stk[0x8e - opcode]
stk[0x8e - opcode] = stk[-1]
stk[-1] = temp
elif op[:3] == 'LOG':
"""
0xa0 ... 0xa4, 32/64/96/128/160 + len(data) gas
a. Opcodes LOG0...LOG4 are added, takes 2-6 stack arguments
MEMSTART MEMSZ (TOPIC1) (TOPIC2) (TOPIC3) (TOPIC4)
b. Logs are kept track of during tx execution exactly the same way as suicides
(except as an ordered list, not a set).
Each log is in the form [address, [topic1, ... ], data] where:
* address is what the ADDRESS opcode would output
* data is mem[MEMSTART: MEMSTART + MEMSZ]
* topics are as provided by the opcode
c. The ordered list of logs in the transaction are expressed as [log0, log1, ..., logN].
"""
depth = int(op[3:])
mstart, msz = stk.pop(), stk.pop()
topics = [stk.pop() for x in range(depth)]
compustate.gas -= msz * opcodes.GLOGBYTE
if msg.static:
return vm_exception('Cannot LOG inside a static context')
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
data = bytearray_to_bytestr(mem[mstart:mstart + msz])
ext.log(msg.to, topics, data)
log_log.trace('LOG',
to=msg.to,
topics=topics,
data=list(map(utils.safe_ord, data)))
# print('LOG', msg.to, topics, list(map(ord, data)))
elif op == 'CREATE':
value, mstart, msz = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
if msg.static:
return vm_exception(
'Cannot CREATE inside a static context')
if ext.get_balance(msg.to) >= value and msg.depth < MAX_DEPTH:
cd = CallData(mem, mstart, msz)
ingas = compustate.gas
if ext.post_anti_dos_hardfork():
ingas = all_but_1n(ingas,
opcodes.CALL_CHILD_LIMIT_DENOM)
create_msg = Message(msg.to, b'', value, ingas, cd,
msg.depth + 1)
o, gas, addr = ext.create(create_msg)
if o:
stk.append(utils.coerce_to_int(addr))
else:
stk.append(0)
compustate.gas = compustate.gas - ingas + gas
else:
stk.append(0)
elif op in ('CALL', 'CALLCODE', 'DELEGATECALL', 'STATICCALL'):
# Pull arguments from the stack
if op in ('CALL', 'CALLCODE'):
gas, to, value, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
else:
gas, to, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
value = 0
# Static context prohibition
if msg.static and value > 0:
return vm_exception(
'Cannot make a non-zero-value call inside a static context'
)
# Expand memory
if not mem_extend(mem, compustate, op, meminstart, meminsz) or \
not mem_extend(mem, compustate, op, memoutstart, memoutsz):
return vm_exception('OOG EXTENDING MEMORY')
to = utils.int_to_addr(to)
# Extra gas costs based on hard fork-dependent factors
extra_gas = (not ext.account_exists(to)) * (op == 'CALL') * (value > 0 or not ext.post_clearing_hardfork()) * opcodes.GCALLNEWACCOUNT + \
(value > 0) * opcodes.GCALLVALUETRANSFER + \
ext.post_anti_dos_hardfork() * opcodes.CALL_SUPPLEMENTAL_GAS
# Compute child gas limit
if ext.post_anti_dos_hardfork():
if compustate.gas < extra_gas:
return vm_exception('OUT OF GAS', needed=extra_gas)
gas = min(
gas,
all_but_1n(compustate.gas - extra_gas,
opcodes.CALL_CHILD_LIMIT_DENOM))
else:
if compustate.gas < gas + extra_gas:
return vm_exception('OUT OF GAS',
needed=gas + extra_gas)
submsg_gas = gas + opcodes.GSTIPEND * (value > 0)
# Verify that there is sufficient balance and depth
if ext.get_balance(msg.to) < value or msg.depth >= MAX_DEPTH:
compustate.gas -= (gas + extra_gas - submsg_gas)
stk.append(0)
else:
# Subtract gas from parent
compustate.gas -= (gas + extra_gas)
assert compustate.gas >= 0
cd = CallData(mem, meminstart, meminsz)
# Generate the message
if op == 'CALL':
call_msg = Message(msg.to,
to,
value,
submsg_gas,
cd,
msg.depth + 1,
code_address=to,
static=msg.static)
elif ext.post_homestead_hardfork(
) and op == 'DELEGATECALL':
call_msg = Message(msg.sender,
msg.to,
msg.value,
submsg_gas,
cd,
msg.depth + 1,
code_address=to,
transfers_value=False,
static=msg.static)
elif op == 'DELEGATECALL':
return vm_exception('OPCODE INACTIVE')
elif op == 'CALLCODE':
call_msg = Message(msg.to,
msg.to,
value,
submsg_gas,
cd,
msg.depth + 1,
code_address=to,
static=msg.static)
elif op == 'STATICCALL':
call_msg = Message(msg.to,
to,
value,
submsg_gas,
cd,
msg.depth + 1,
code_address=to,
static=True)
else:
raise Exception("Lolwut")
# Get result
result, gas, data = ext.msg(call_msg)
if result == 0:
stk.append(0)
else:
stk.append(1)
# Set output memory
for i in range(min(len(data), memoutsz)):
mem[memoutstart + i] = data[i]
compustate.gas += gas
compustate.last_returned = bytearray(data)
elif op == 'RETURN':
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
return peaceful_exit('RETURN', compustate.gas, mem[s0:s0 + s1])
elif op == 'REVERT':
if not ext.post_metropolis_hardfork():
return vm_exception('Opcode not yet enabled')
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
return revert(compustate.gas, mem[s0:s0 + s1])
elif op == 'SUICIDE':
if msg.static:
return vm_exception(
'Cannot SUICIDE inside a static context')
to = utils.encode_int(stk.pop())
to = ((b'\x00' * (32 - len(to))) + to)[12:]
xfer = ext.get_balance(msg.to)
if ext.post_anti_dos_hardfork():
extra_gas = opcodes.SUICIDE_SUPPLEMENTAL_GAS + \
(not ext.account_exists(
to)) * (xfer > 0 or not ext.post_clearing_hardfork()) * opcodes.GCALLNEWACCOUNT
if not eat_gas(compustate, extra_gas):
return vm_exception("OUT OF GAS")
ext.set_balance(to, ext.get_balance(to) + xfer)
ext.set_balance(msg.to, 0)
ext.add_suicide(msg.to)
log_msg.debug('SUICIDING',
addr=utils.checksum_encode(msg.to),
to=utils.checksum_encode(to),
xferring=xfer)
return 1, compustate.gas, []
# assert utils.is_numeric(compustate.gas)
# this is slow!
# for a in stk:
# assert is_numeric(a), (op, stk)
# assert a >= 0 and a < 2**256, (a, op, stk)
# if not jumped:
# assert compustate.pc == nextpos
# compustate.pc = nextpos
if compustate.pc >= codelen:
return peaceful_exit('CODE OUT OF RANGE', compustate.gas, [])
return vm_exception('INVALID JUMP')
def encode_single(typ, arg):
base, sub, _ = typ
# Unsigned integers: uint<sz>
if base == 'uint':
sub = int(sub)
i = decint(arg)
if not 0 <= i < 2**sub:
raise ValueOutOfBounds(repr(arg))
return zpad(encode_int(i), 32)
# bool: int<sz>
elif base == 'bool':
assert isinstance(arg, bool)
return zpad(encode_int(int(arg)), 32)
# Signed integers: int<sz>
elif base == 'int':
sub = int(sub)
i = decint(arg)
if not -2**(sub - 1) <= i < 2**sub:
raise ValueOutOfBounds(repr(arg))
return zpad(encode_int(i % 2**sub), 32)
# Unsigned reals: ureal<high>x<low>
elif base == 'ureal':
high, low = [int(x) for x in sub.split('x')]
if not 0 <= arg < 2**high:
raise ValueOutOfBounds(repr(arg))
return zpad(encode_int(arg * 2**low), 32)
# Signed reals: real<high>x<low>
elif base == 'real':
high, low = [int(x) for x in sub.split('x')]
if not -2**(high - 1) <= arg < 2**(high - 1):
raise ValueOutOfBounds(repr(arg))
return zpad(encode_int((arg % 2**high) * 2**low), 32)
# Strings
elif base == 'string' or base == 'bytes':
if not is_string(arg):
raise EncodingError("Expecting string: %r" % arg)
# Fixed length: string<sz>
if len(sub):
assert int(sub) <= 32
assert len(arg) <= int(sub)
return arg + b'\x00' * (32 - len(arg))
# Variable length: string
else:
return zpad(encode_int(len(arg)), 32) + \
arg + \
b'\x00' * (utils.ceil32(len(arg)) - len(arg))
# Hashes: hash<sz>
elif base == 'hash':
if not (int(sub) and int(sub) <= 32):
raise EncodingError("too long: %r" % arg)
if isnumeric(arg):
return zpad(encode_int(arg), 32)
elif len(arg) == len(sub):
return zpad(arg, 32)
elif len(arg) == len(sub) * 2:
return zpad(decode_hex(arg), 32)
else:
raise EncodingError("Could not parse hash: %r" % arg)
# Addresses: address (== hash160)
elif base == 'address':
assert sub == ''
if isnumeric(arg):
return zpad(encode_int(arg), 32)
elif len(arg) == 20:
return zpad(arg, 32)
elif len(arg) == 40:
return zpad(decode_hex(arg), 32)
else:
raise EncodingError("Could not parse address: %r" % arg)
raise EncodingError("Unhandled type: %r %r" % (base, sub))
def __init__(self, contract_interface):
if is_string(contract_interface):
contract_interface = json_decode(contract_interface)
self.fallback_data = None
self.constructor_data = None
self.function_data = {}
self.event_data = {}
for description in contract_interface:
entry_type = description.get('type', 'function')
encode_types = []
signature = []
# If it's a function/constructor/event
if entry_type != 'fallback' and 'inputs' in description:
encode_types = [
element['type']
for element in description.get('inputs', [])
]
signature = [
(element['type'], element['name'])
for element in description.get('inputs', [])
]
if entry_type == 'function':
normalized_name = normalize_name(description['name'])
prefix = method_id(normalized_name, encode_types)
decode_types = [
element['type']
for element in description.get('outputs', [])
]
self.function_data[normalized_name] = {
'prefix': prefix,
'encode_types': encode_types,
'decode_types': decode_types,
'is_constant': description.get('constant', False),
'signature': signature,
'payable': description.get('payable', False),
}
elif entry_type == 'event':
normalized_name = normalize_name(description['name'])
indexed = [
element['indexed']
for element in description['inputs']
]
names = [
element['name']
for element in description['inputs']
]
# event_id == topics[0]
self.event_data[event_id(normalized_name, encode_types)] = {
'types': encode_types,
'name': normalized_name,
'names': names,
'indexed': indexed,
'anonymous': description.get('anonymous', False),
}
elif entry_type == 'constructor':
if self.constructor_data is not None:
raise ValueError('Only one constructor is supported.')
self.constructor_data = {
'encode_types': encode_types,
'signature': signature,
}
elif entry_type == 'fallback':
if self.fallback_data is not None:
raise ValueError(
'Only one fallback function is supported.')
self.fallback_data = {'payable': description['payable']}
else:
raise ValueError('Unknown type {}'.format(description['type']))
def vm_execute(ext, msg, code):
# precompute trace flag
# if we trace vm, we're in slow mode anyway
trace_vm = log_vm_op.is_active('trace')
compustate = Compustate(gas=msg.gas)
stk = compustate.stack
mem = compustate.memory
processed_code = preprocess_code(code)
s = time.time()
op = None
steps = 0
_prevop = None # for trace only
while True:
# print('op: ', op, time.time() - s)
# s = time.time()
# stack size limit error
if compustate.pc not in processed_code:
return vm_exception('INVALID START POINT')
_data = processed_code[compustate.pc]
gas, min_stack, max_stack, compustate.pc = _data[:4]
ops = _data[4:]
# out of gas error
if gas > compustate.gas:
return vm_exception('OUT OF GAS')
# insufficient stack error
if not (min_stack <= len(compustate.stack) <= max_stack):
return vm_exception('INCOMPATIBLE STACK LENGTH',
min_stack=min_stack,
have=len(compustate.stack),
max_stack=max_stack)
# Apply operation
compustate.gas -= gas
for op in ops:
if trace_vm:
"""
This diverges from normal logging, as we use the logging namespace
only to decide which features get logged in 'eth.vm.op'
i.e. tracing can not be activated by activating a sub
like 'eth.vm.op.stack'
"""
trace_data = {}
trace_data['stack'] = list(
map(to_string, list(compustate.stack)))
if _prevop in (op_MLOAD, op_MSTORE, op_MSTORE8, op_SHA3,
op_CALL, op_CALLCODE, op_CREATE,
op_CALLDATACOPY, op_CODECOPY, op_EXTCODECOPY):
if len(compustate.memory) < 1024:
trace_data['memory'] = \
b''.join([encode_hex(ascii_chr(x)) for x
in compustate.memory])
else:
trace_data['sha3memory'] = \
encode_hex(utils.sha3(''.join([ascii_chr(x) for
x in compustate.memory])))
if _prevop in (op_SSTORE, op_SLOAD) or steps == 0:
trace_data['storage'] = ext.log_storage(msg.to)
# trace_data['gas'] = to_string(compustate.gas + fee)
trace_data['inst'] = op
trace_data['pc'] = to_string(compustate.pc - 1)
if steps == 0:
trace_data['depth'] = msg.depth
trace_data['address'] = msg.to
trace_data['op'] = op
trace_data['steps'] = steps
# if op[:4] == 'PUSH':
# trace_data['pushvalue'] = pushval
log_vm_op.trace('vm', **trace_data)
steps += 1
_prevop = op
# Invalid operation
if op == INVALID:
return vm_exception('INVALID OP', opcode=op)
# Valid operations
if op < 0x10:
if op == op_STOP:
return peaceful_exit('STOP', compustate.gas, [])
elif op == op_ADD:
stk.append((stk.pop() + stk.pop()) & TT256M1)
elif op == op_SUB:
stk.append((stk.pop() - stk.pop()) & TT256M1)
elif op == op_MUL:
stk.append((stk.pop() * stk.pop()) & TT256M1)
elif op == op_DIV:
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 // s1)
elif op == op_MOD:
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 % s1)
elif op == op_SDIV:
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(0 if s1 == 0 else (abs(s0) // abs(s1) *
(-1 if s0 * s1 < 0 else 1))
& TT256M1)
elif op == op_SMOD:
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(0 if s1 == 0 else (abs(s0) % abs(s1) *
(-1 if s0 < 0 else 1))
& TT256M1)
elif op == op_ADDMOD:
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 + s1) % s2 if s2 else 0)
elif op == op_MULMOD:
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 * s1) % s2 if s2 else 0)
elif op == op_EXP:
base, exponent = stk.pop(), stk.pop()
# fee for exponent is dependent on its bytes
# calc n bytes to represent exponent
nbytes = len(utils.encode_int(exponent))
expfee = nbytes * opcodes.GEXPONENTBYTE
if compustate.gas < expfee:
compustate.gas = 0
return vm_exception('OOG EXPONENT')
compustate.gas -= expfee
stk.append(pow(base, exponent, TT256))
elif op == op_SIGNEXTEND:
s0, s1 = stk.pop(), stk.pop()
if s0 <= 31:
testbit = s0 * 8 + 7
if s1 & (1 << testbit):
stk.append(s1 | (TT256 - (1 << testbit)))
else:
stk.append(s1 & ((1 << testbit) - 1))
else:
stk.append(s1)
elif op < 0x20:
if op == op_LT:
stk.append(1 if stk.pop() < stk.pop() else 0)
elif op == op_GT:
stk.append(1 if stk.pop() > stk.pop() else 0)
elif op == op_SLT:
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(1 if s0 < s1 else 0)
elif op == op_SGT:
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(1 if s0 > s1 else 0)
elif op == op_EQ:
stk.append(1 if stk.pop() == stk.pop() else 0)
elif op == op_ISZERO:
stk.append(0 if stk.pop() else 1)
elif op == op_AND:
stk.append(stk.pop() & stk.pop())
elif op == op_OR:
stk.append(stk.pop() | stk.pop())
elif op == op_XOR:
stk.append(stk.pop() ^ stk.pop())
elif op == op_NOT:
stk.append(TT256M1 - stk.pop())
elif op == op_BYTE:
s0, s1 = stk.pop(), stk.pop()
if s0 >= 32:
stk.append(0)
else:
stk.append((s1 // 256**(31 - s0)) % 256)
elif op < 0x40:
if op == op_SHA3:
s0, s1 = stk.pop(), stk.pop()
compustate.gas -= opcodes.GSHA3WORD * \
(utils.ceil32(s1) // 32)
if compustate.gas < 0:
return vm_exception('OOG PAYING FOR SHA3')
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
data = b''.join(map(ascii_chr, mem[s0:s0 + s1]))
stk.append(utils.big_endian_to_int(utils.sha3(data)))
elif op == op_ADDRESS:
stk.append(utils.coerce_to_int(msg.to))
elif op == op_BALANCE:
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
stk.append(ext.get_balance(addr))
elif op == op_ORIGIN:
stk.append(utils.coerce_to_int(ext.tx_origin))
elif op == op_CALLER:
stk.append(utils.coerce_to_int(msg.sender))
elif op == op_CALLVALUE:
stk.append(msg.value)
elif op == op_CALLDATALOAD:
stk.append(msg.data.extract32(stk.pop()))
elif op == op_CALLDATASIZE:
stk.append(msg.data.size)
elif op == op_CALLDATACOPY:
mstart, dstart, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
msg.data.extract_copy(mem, mstart, dstart, size)
elif op == op_CODESIZE:
stk.append(len(code))
elif op == op_CODECOPY:
start, s1, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, start, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
for i in range(size):
if s1 + i < len(code):
mem[start + i] = utils.safe_ord(code[s1 + i])
else:
mem[start + i] = 0
elif op == op_GASPRICE:
stk.append(ext.tx_gasprice)
elif op == op_EXTCODESIZE:
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
stk.append(len(ext.get_code(addr) or b''))
elif op == op_EXTCODECOPY:
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
start, s2, size = stk.pop(), stk.pop(), stk.pop()
extcode = ext.get_code(addr) or b''
assert utils.is_string(extcode)
if not mem_extend(mem, compustate, op, start, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
for i in range(size):
if s2 + i < len(extcode):
mem[start + i] = utils.safe_ord(extcode[s2 + i])
else:
mem[start + i] = 0
elif op < 0x50:
if op == op_BLOCKHASH:
stk.append(
utils.big_endian_to_int(ext.block_hash(stk.pop())))
elif op == op_COINBASE:
stk.append(utils.big_endian_to_int(ext.block_coinbase))
elif op == op_TIMESTAMP:
stk.append(ext.block_timestamp)
elif op == op_NUMBER:
stk.append(ext.block_number)
elif op == op_DIFFICULTY:
stk.append(ext.block_difficulty)
elif op == op_GASLIMIT:
stk.append(ext.block_gas_limit)
elif op < 0x60:
if op == op_POP:
stk.pop()
elif op == op_MLOAD:
s0 = stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
data = 0
for c in mem[s0:s0 + 32]:
data = (data << 8) + c
stk.append(data)
elif op == op_MSTORE:
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
v = s1
for i in range(31, -1, -1):
mem[s0 + i] = v % 256
v //= 256
elif op == op_MSTORE8:
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 1):
return vm_exception('OOG EXTENDING MEMORY')
mem[s0] = s1 % 256
elif op == op_SLOAD:
stk.append(ext.get_storage_data(msg.to, stk.pop()))
elif op == op_SSTORE:
s0, s1 = stk.pop(), stk.pop()
if ext.get_storage_data(msg.to, s0):
gascost = opcodes.GSTORAGEMOD if s1 else opcodes.GSTORAGEKILL
refund = 0 if s1 else opcodes.GSTORAGEREFUND
else:
gascost = opcodes.GSTORAGEADD if s1 else opcodes.GSTORAGEMOD
refund = 0
if compustate.gas < gascost:
return vm_exception('OUT OF GAS')
compustate.gas -= gascost
# adds neg gascost as a refund if below zero
ext.add_refund(refund)
ext.set_storage_data(msg.to, s0, s1)
elif op == op_JUMP:
compustate.pc = stk.pop()
opnew = processed_code[compustate.pc][4] if \
compustate.pc in processed_code else op_STOP
if opnew != op_JUMPDEST:
return vm_exception('BAD JUMPDEST')
elif op == op_JUMPI:
s0, s1 = stk.pop(), stk.pop()
if s1:
compustate.pc = s0
opnew = processed_code[compustate.pc][4] if \
compustate.pc in processed_code else op_STOP
if opnew != op_JUMPDEST:
return vm_exception('BAD JUMPDEST')
elif op == op_PC:
stk.append(compustate.pc - 1)
elif op == op_MSIZE:
stk.append(len(mem))
elif op == op_GAS:
stk.append(compustate.gas) # AFTER subtracting cost 1
elif op_PUSH1 <= (op & 255) <= op_PUSH32:
# Hide push value in high-order bytes of op
stk.append(op >> 8)
elif op_DUP1 <= op <= op_DUP16:
depth = op - op_DUP1 + 1
stk.append(stk[-depth])
elif op_SWAP1 <= op <= op_SWAP16:
depth = op - op_SWAP1 + 1
temp = stk[-depth - 1]
stk[-depth - 1] = stk[-1]
stk[-1] = temp
elif op_LOG0 <= op <= op_LOG4:
"""
0xa0 ... 0xa4, 32/64/96/128/160 + len(data) gas
a. Opcodes LOG0...LOG4 are added, takes 2-6 stack arguments
MEMSTART MEMSZ (TOPIC1) (TOPIC2) (TOPIC3) (TOPIC4)
b. Logs are kept track of during tx execution exactly the same way as suicides
(except as an ordered list, not a set).
Each log is in the form [address, [topic1, ... ], data] where:
* address is what the ADDRESS opcode would output
* data is mem[MEMSTART: MEMSTART + MEMSZ]
* topics are as provided by the opcode
c. The ordered list of logs in the transaction are expressed as [log0, log1, ..., logN].
"""
depth = op - op_LOG0
mstart, msz = stk.pop(), stk.pop()
topics = [stk.pop() for x in range(depth)]
compustate.gas -= msz * opcodes.GLOGBYTE
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
data = b''.join(map(ascii_chr, mem[mstart:mstart + msz]))
ext.log(msg.to, topics, data)
log_log.trace('LOG',
to=msg.to,
topics=topics,
data=list(map(utils.safe_ord, data)))
# print('LOG', msg.to, topics, list(map(ord, data)))
elif op == op_CREATE:
value, mstart, msz = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
cd = CallData(mem, mstart, msz)
create_msg = Message(msg.to, b'', value, compustate.gas,
cd, msg.depth + 1)
o, gas, addr = ext.create(create_msg)
if o:
stk.append(utils.coerce_to_int(addr))
compustate.gas = gas
else:
stk.append(0)
compustate.gas = 0
else:
stk.append(0)
elif op == op_CALL:
gas, to, value, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, meminstart, meminsz) or \
not mem_extend(mem, compustate, op, memoutstart, memoutsz):
return vm_exception('OOG EXTENDING MEMORY')
to = utils.encode_int(to)
to = ((b'\x00' * (32 - len(to))) + to)[12:]
extra_gas = (not ext.account_exists(to)) * opcodes.GCALLNEWACCOUNT + \
(value > 0) * opcodes.GCALLVALUETRANSFER
submsg_gas = gas + opcodes.GSTIPEND * (value > 0)
if compustate.gas < gas + extra_gas:
return vm_exception('OUT OF GAS', needed=gas + extra_gas)
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
compustate.gas -= (gas + extra_gas)
cd = CallData(mem, meminstart, meminsz)
call_msg = Message(msg.to,
to,
value,
submsg_gas,
cd,
msg.depth + 1,
code_address=to)
result, gas, data = ext.msg(call_msg)
if result == 0:
stk.append(0)
else:
stk.append(1)
compustate.gas += gas
for i in range(min(len(data), memoutsz)):
mem[memoutstart + i] = data[i]
else:
compustate.gas -= (gas + extra_gas - submsg_gas)
stk.append(0)
elif op == op_CALLCODE:
gas, to, value, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, meminstart, meminsz) or \
not mem_extend(mem, compustate, op, memoutstart, memoutsz):
return vm_exception('OOG EXTENDING MEMORY')
extra_gas = (value > 0) * opcodes.GCALLVALUETRANSFER
submsg_gas = gas + opcodes.GSTIPEND * (value > 0)
if compustate.gas < gas + extra_gas:
return vm_exception('OUT OF GAS', needed=gas + extra_gas)
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
compustate.gas -= (gas + extra_gas)
to = utils.encode_int(to)
to = ((b'\x00' * (32 - len(to))) + to)[12:]
cd = CallData(mem, meminstart, meminsz)
call_msg = Message(msg.to,
msg.to,
value,
submsg_gas,
cd,
msg.depth + 1,
code_address=to)
result, gas, data = ext.msg(call_msg)
if result == 0:
stk.append(0)
else:
stk.append(1)
compustate.gas += gas
for i in range(min(len(data), memoutsz)):
mem[memoutstart + i] = data[i]
else:
compustate.gas -= (gas + extra_gas - submsg_gas)
stk.append(0)
elif op == op_RETURN:
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
return peaceful_exit('RETURN', compustate.gas, mem[s0:s0 + s1])
elif op == op_SUICIDE:
to = utils.encode_int(stk.pop())
to = ((b'\x00' * (32 - len(to))) + to)[12:]
xfer = ext.get_balance(msg.to)
ext.set_balance(to, ext.get_balance(to) + xfer)
ext.set_balance(msg.to, 0)
ext.add_suicide(msg.to)
# print('suiciding %s %s %d' % (msg.to, to, xfer))
return 1, compustate.gas, []
def _dec(x):
if utils.is_string(x) and x.startswith(b'0x'):
return utils.decode_hex(x[2:])
return x
def vm_execute(ext, msg, code):
# precompute trace flag
# if we trace vm, we're in slow mode anyway
trace_vm = log_vm_op.is_active('trace')
compustate = Compustate(gas=msg.gas)
stk = compustate.stack
mem = compustate.memory
if code in code_cache:
processed_code = code_cache[code]
else:
processed_code = preprocess_code(code)
code_cache[code] = processed_code
codelen = len(processed_code)
s = time.time()
op = None
steps = 0
_prevop = None # for trace only
while 1:
# print('op: ', op, time.time() - s)
# s = time.time()
# stack size limit error
if compustate.pc >= codelen:
return peaceful_exit('CODE OUT OF RANGE', compustate.gas, [])
op, in_args, out_args, fee, opcode, pushval = \
processed_code[compustate.pc]
# out of gas error
if fee > compustate.gas:
return vm_exception('OUT OF GAS')
# empty stack error
if in_args > len(compustate.stack):
return vm_exception('INSUFFICIENT STACK',
op=op, needed=to_string(in_args),
available=to_string(len(compustate.stack)))
if len(compustate.stack) - in_args + out_args > 1024:
return vm_exception('STACK SIZE LIMIT EXCEEDED',
op=op,
pre_height=to_string(len(compustate.stack)))
# Apply operation
compustate.gas -= fee
compustate.pc += 1
if trace_vm:
"""
This diverges from normal logging, as we use the logging namespace
only to decide which features get logged in 'eth.vm.op'
i.e. tracing can not be activated by activating a sub
like 'eth.vm.op.stack'
"""
trace_data = {}
trace_data['stack'] = list(map(to_string, list(compustate.stack)))
if _prevop in ('MLOAD', 'MSTORE', 'MSTORE8', 'SHA3', 'CALL',
'CALLCODE', 'CREATE', 'CALLDATACOPY', 'CODECOPY',
'EXTCODECOPY'):
if len(compustate.memory) < 1024:
trace_data['memory'] = \
b''.join([encode_hex(ascii_chr(x)) for x
in compustate.memory])
else:
trace_data['sha3memory'] = \
encode_hex(utils.sha3(''.join([ascii_chr(x) for
x in compustate.memory])))
if _prevop in ('SSTORE', 'SLOAD') or steps == 0:
trace_data['storage'] = ext.log_storage(msg.to)
trace_data['gas'] = to_string(compustate.gas + fee)
trace_data['inst'] = opcode
trace_data['pc'] = to_string(compustate.pc - 1)
if steps == 0:
trace_data['depth'] = msg.depth
trace_data['address'] = msg.to
trace_data['op'] = op
trace_data['steps'] = steps
if op[:4] == 'PUSH':
trace_data['pushvalue'] = pushval
log_vm_op.trace('vm', **trace_data)
steps += 1
_prevop = op
# Invalid operation
if op == 'INVALID':
return vm_exception('INVALID OP', opcode=opcode)
# Valid operations
if opcode < 0x10:
if op == 'STOP':
return peaceful_exit('STOP', compustate.gas, [])
elif op == 'ADD':
stk.append((stk.pop() + stk.pop()) & TT256M1)
elif op == 'SUB':
stk.append((stk.pop() - stk.pop()) & TT256M1)
elif op == 'MUL':
stk.append((stk.pop() * stk.pop()) & TT256M1)
elif op == 'DIV':
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 // s1)
elif op == 'MOD':
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 % s1)
elif op == 'SDIV':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(stk.pop())
stk.append(0 if s1 == 0 else (abs(s0) // abs(s1) *
(-1 if s0 * s1 < 0 else 1)) & TT256M1)
elif op == 'SMOD':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(stk.pop())
stk.append(0 if s1 == 0 else (abs(s0) % abs(s1) *
(-1 if s0 < 0 else 1)) & TT256M1)
elif op == 'ADDMOD':
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 + s1) % s2 if s2 else 0)
elif op == 'MULMOD':
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 * s1) % s2 if s2 else 0)
elif op == 'EXP':
base, exponent = stk.pop(), stk.pop()
# fee for exponent is dependent on its bytes
# calc n bytes to represent exponent
nbytes = len(utils.encode_int(exponent))
expfee = nbytes * opcodes.GEXPONENTBYTE
if compustate.gas < expfee:
compustate.gas = 0
return vm_exception('OOG EXPONENT')
compustate.gas -= expfee
stk.append(pow(base, exponent, TT256))
elif op == 'SIGNEXTEND':
s0, s1 = stk.pop(), stk.pop()
if s0 <= 31:
testbit = s0 * 8 + 7
if s1 & (1 << testbit):
stk.append(s1 | (TT256 - (1 << testbit)))
else:
stk.append(s1 & ((1 << testbit) - 1))
else:
stk.append(s1)
elif opcode < 0x20:
if op == 'LT':
stk.append(1 if stk.pop() < stk.pop() else 0)
elif op == 'GT':
stk.append(1 if stk.pop() > stk.pop() else 0)
elif op == 'SLT':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(stk.pop())
stk.append(1 if s0 < s1 else 0)
elif op == 'SGT':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(stk.pop())
stk.append(1 if s0 > s1 else 0)
elif op == 'EQ':
stk.append(1 if stk.pop() == stk.pop() else 0)
elif op == 'ISZERO':
stk.append(0 if stk.pop() else 1)
elif op == 'AND':
stk.append(stk.pop() & stk.pop())
elif op == 'OR':
stk.append(stk.pop() | stk.pop())
elif op == 'XOR':
stk.append(stk.pop() ^ stk.pop())
elif op == 'NOT':
stk.append(TT256M1 - stk.pop())
elif op == 'BYTE':
s0, s1 = stk.pop(), stk.pop()
if s0 >= 32:
stk.append(0)
else:
stk.append((s1 // 256 ** (31 - s0)) % 256)
elif opcode < 0x40:
if op == 'SHA3':
s0, s1 = stk.pop(), stk.pop()
compustate.gas -= opcodes.GSHA3WORD * (utils.ceil32(s1) // 32)
if compustate.gas < 0:
return vm_exception('OOG PAYING FOR SHA3')
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
data = b''.join(map(ascii_chr, mem[s0: s0 + s1]))
stk.append(utils.big_endian_to_int(utils.sha3(data)))
elif op == 'ADDRESS':
stk.append(utils.coerce_to_int(msg.to))
elif op == 'BALANCE':
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
stk.append(ext.get_balance(addr))
elif op == 'ORIGIN':
stk.append(utils.coerce_to_int(ext.tx_origin))
elif op == 'CALLER':
stk.append(utils.coerce_to_int(msg.sender))
elif op == 'CALLVALUE':
stk.append(msg.value)
elif op == 'CALLDATALOAD':
stk.append(msg.data.extract32(stk.pop()))
elif op == 'CALLDATASIZE':
stk.append(msg.data.size)
elif op == 'CALLDATACOPY':
mstart, dstart, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
msg.data.extract_copy(mem, mstart, dstart, size)
elif op == 'CODESIZE':
stk.append(len(processed_code))
elif op == 'CODECOPY':
start, s1, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, start, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
for i in range(size):
if s1 + i < len(processed_code):
mem[start + i] = processed_code[s1 + i][4]
else:
mem[start + i] = 0
elif op == 'GASPRICE':
stk.append(ext.tx_gasprice)
elif op == 'EXTCODESIZE':
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
stk.append(len(ext.get_code(addr) or b''))
elif op == 'EXTCODECOPY':
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
start, s2, size = stk.pop(), stk.pop(), stk.pop()
extcode = ext.get_code(addr) or b''
assert utils.is_string(extcode)
if not mem_extend(mem, compustate, op, start, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
for i in range(size):
if s2 + i < len(extcode):
mem[start + i] = utils.safe_ord(extcode[s2 + i])
else:
mem[start + i] = 0
elif opcode < 0x50:
if op == 'BLOCKHASH':
stk.append(utils.big_endian_to_int(ext.block_hash(stk.pop())))
elif op == 'COINBASE':
stk.append(utils.big_endian_to_int(ext.block_coinbase))
elif op == 'TIMESTAMP':
stk.append(ext.block_timestamp)
elif op == 'NUMBER':
stk.append(ext.block_number)
elif op == 'DIFFICULTY':
stk.append(ext.block_difficulty)
elif op == 'GASLIMIT':
stk.append(ext.block_gas_limit)
elif opcode < 0x60:
if op == 'POP':
stk.pop()
elif op == 'MLOAD':
s0 = stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
data = b''.join(map(ascii_chr, mem[s0: s0 + 32]))
stk.append(utils.big_endian_to_int(data))
elif op == 'MSTORE':
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
v = s1
for i in range(31, -1, -1):
mem[s0 + i] = v % 256
v //= 256
elif op == 'MSTORE8':
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 1):
return vm_exception('OOG EXTENDING MEMORY')
mem[s0] = s1 % 256
elif op == 'SLOAD':
stk.append(ext.get_storage_data(msg.to, stk.pop()))
elif op == 'SSTORE':
s0, s1 = stk.pop(), stk.pop()
if ext.get_storage_data(msg.to, s0):
gascost = opcodes.GSTORAGEMOD if s1 else opcodes.GSTORAGEKILL
refund = 0 if s1 else opcodes.GSTORAGEREFUND
else:
gascost = opcodes.GSTORAGEADD if s1 else opcodes.GSTORAGEMOD
refund = 0
if compustate.gas < gascost:
return vm_exception('OUT OF GAS')
compustate.gas -= gascost
ext.add_refund(refund) # adds neg gascost as a refund if below zero
ext.set_storage_data(msg.to, s0, s1)
elif op == 'JUMP':
compustate.pc = stk.pop()
opnew = processed_code[compustate.pc][0] if \
compustate.pc < len(processed_code) else 'STOP'
if opnew != 'JUMPDEST':
return vm_exception('BAD JUMPDEST')
elif op == 'JUMPI':
s0, s1 = stk.pop(), stk.pop()
if s1:
compustate.pc = s0
opnew = processed_code[compustate.pc][0] if \
compustate.pc < len(processed_code) else 'STOP'
if opnew != 'JUMPDEST':
return vm_exception('BAD JUMPDEST')
elif op == 'PC':
stk.append(compustate.pc - 1)
elif op == 'MSIZE':
stk.append(len(mem))
elif op == 'GAS':
stk.append(compustate.gas) # AFTER subtracting cost 1
elif op[:4] == 'PUSH':
pushnum = int(op[4:])
compustate.pc += pushnum
stk.append(pushval)
elif op[:3] == 'DUP':
depth = int(op[3:])
stk.append(stk[-depth])
elif op[:4] == 'SWAP':
depth = int(op[4:])
temp = stk[-depth - 1]
stk[-depth - 1] = stk[-1]
stk[-1] = temp
elif op[:3] == 'LOG':
"""
0xa0 ... 0xa4, 32/64/96/128/160 + len(data) gas
a. Opcodes LOG0...LOG4 are added, takes 2-6 stack arguments
MEMSTART MEMSZ (TOPIC1) (TOPIC2) (TOPIC3) (TOPIC4)
b. Logs are kept track of during tx execution exactly the same way as suicides
(except as an ordered list, not a set).
Each log is in the form [address, [topic1, ... ], data] where:
* address is what the ADDRESS opcode would output
* data is mem[MEMSTART: MEMSTART + MEMSZ]
* topics are as provided by the opcode
c. The ordered list of logs in the transaction are expressed as [log0, log1, ..., logN].
"""
depth = int(op[3:])
mstart, msz = stk.pop(), stk.pop()
topics = [stk.pop() for x in range(depth)]
compustate.gas -= msz * opcodes.GLOGBYTE
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
data = b''.join(map(ascii_chr, mem[mstart: mstart + msz]))
ext.log(msg.to, topics, data)
log_log.trace('LOG', to=msg.to, topics=topics, data=list(map(utils.safe_ord, data)))
# print('LOG', msg.to, topics, list(map(ord, data)))
elif op == 'CREATE':
value, mstart, msz = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
cd = CallData(mem, mstart, msz)
create_msg = Message(msg.to, b'', value, compustate.gas, cd, msg.depth + 1)
o, gas, addr = ext.create(create_msg)
if o:
stk.append(utils.coerce_to_int(addr))
compustate.gas = gas
else:
stk.append(0)
compustate.gas = 0
else:
stk.append(0)
elif op == 'CALL':
gas, to, value, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, meminstart, meminsz) or \
not mem_extend(mem, compustate, op, memoutstart, memoutsz):
return vm_exception('OOG EXTENDING MEMORY')
to = utils.encode_int(to)
to = ((b'\x00' * (32 - len(to))) + to)[12:]
extra_gas = (not ext.account_exists(to)) * opcodes.GCALLNEWACCOUNT + \
(value > 0) * opcodes.GCALLVALUETRANSFER
submsg_gas = gas + opcodes.GSTIPEND * (value > 0)
if compustate.gas < gas + extra_gas:
return vm_exception('OUT OF GAS', needed=gas+extra_gas)
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
compustate.gas -= (gas + extra_gas)
cd = CallData(mem, meminstart, meminsz)
call_msg = Message(msg.to, to, value, submsg_gas, cd,
msg.depth + 1, code_address=to)
result, gas, data = ext.msg(call_msg)
if result == 0:
stk.append(0)
else:
stk.append(1)
compustate.gas += gas
for i in range(min(len(data), memoutsz)):
mem[memoutstart + i] = data[i]
else:
compustate.gas -= (gas + extra_gas - submsg_gas)
stk.append(0)
elif op == 'CALLCODE' or op == 'DELEGATECALL':
if op == 'CALLCODE':
gas, to, value, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
else:
gas, to, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
value = 0
if not mem_extend(mem, compustate, op, meminstart, meminsz) or \
not mem_extend(mem, compustate, op, memoutstart, memoutsz):
return vm_exception('OOG EXTENDING MEMORY')
extra_gas = (value > 0) * opcodes.GCALLVALUETRANSFER
submsg_gas = gas + opcodes.GSTIPEND * (value > 0)
if compustate.gas < gas + extra_gas:
return vm_exception('OUT OF GAS', needed=gas+extra_gas)
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
compustate.gas -= (gas + extra_gas)
to = utils.encode_int(to)
to = ((b'\x00' * (32 - len(to))) + to)[12:]
cd = CallData(mem, meminstart, meminsz)
if ext.post_homestead_hardfork() and op == 'DELEGATECALL':
call_msg = Message(msg.sender, msg.to, msg.value, submsg_gas, cd,
msg.depth + 1, code_address=to, transfers_value=False)
elif op == 'DELEGATECALL':
return vm_exception('OPCODE INACTIVE')
else:
call_msg = Message(msg.to, msg.to, value, submsg_gas, cd,
msg.depth + 1, code_address=to)
result, gas, data = ext.msg(call_msg)
if result == 0:
stk.append(0)
else:
stk.append(1)
compustate.gas += gas
for i in range(min(len(data), memoutsz)):
mem[memoutstart + i] = data[i]
else:
compustate.gas -= (gas + extra_gas - submsg_gas)
stk.append(0)
elif op == 'RETURN':
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
return peaceful_exit('RETURN', compustate.gas, mem[s0: s0 + s1])
elif op == 'SUICIDE':
to = utils.encode_int(stk.pop())
to = ((b'\x00' * (32 - len(to))) + to)[12:]
xfer = ext.get_balance(msg.to)
ext.set_balance(to, ext.get_balance(to) + xfer)
ext.set_balance(msg.to, 0)
ext.add_suicide(msg.to)
# print('suiciding %s %s %d' % (msg.to, to, xfer))
return 1, compustate.gas, []