_id stringlengths 2 7 | title stringlengths 1 88 | partition stringclasses 3
values | text stringlengths 75 19.8k | language stringclasses 1
value | meta_information dict |
|---|---|---|---|---|---|
q225400 | SqlalchemyDataLayer.get_collection | train | def get_collection(self, qs, view_kwargs):
"""Retrieve a collection of objects through sqlalchemy
:param QueryStringManager qs: a querystring manager to retrieve information from url
:param dict view_kwargs: kwargs from the resource view
:return tuple: the number of object and the list ... | python | {
"resource": ""
} |
q225401 | SqlalchemyDataLayer.update_object | train | def update_object(self, obj, data, view_kwargs):
"""Update an object through sqlalchemy
:param DeclarativeMeta obj: an object from sqlalchemy
:param dict data: the data validated by marshmallow
:param dict view_kwargs: kwargs from the resource view
:return boolean: True if objec... | python | {
"resource": ""
} |
q225402 | SqlalchemyDataLayer.delete_object | train | def delete_object(self, obj, view_kwargs):
"""Delete an object through sqlalchemy
:param DeclarativeMeta item: an item from sqlalchemy
:param dict view_kwargs: kwargs from the resource view
"""
if obj is None:
url_field = getattr(self, 'url_field', 'id')
... | python | {
"resource": ""
} |
q225403 | SqlalchemyDataLayer.create_relationship | train | def create_relationship(self, json_data, relationship_field, related_id_field, view_kwargs):
"""Create a relationship
:param dict json_data: the request params
:param str relationship_field: the model attribute used for relationship
:param str related_id_field: the identifier field of t... | python | {
"resource": ""
} |
q225404 | SqlalchemyDataLayer.get_relationship | train | def get_relationship(self, relationship_field, related_type_, related_id_field, view_kwargs):
"""Get a relationship
:param str relationship_field: the model attribute used for relationship
:param str related_type_: the related resource type
:param str related_id_field: the identifier fi... | python | {
"resource": ""
} |
q225405 | SqlalchemyDataLayer.delete_relationship | train | def delete_relationship(self, json_data, relationship_field, related_id_field, view_kwargs):
"""Delete a relationship
:param dict json_data: the request params
:param str relationship_field: the model attribute used for relationship
:param str related_id_field: the identifier field of t... | python | {
"resource": ""
} |
q225406 | SqlalchemyDataLayer.get_related_object | train | def get_related_object(self, related_model, related_id_field, obj):
"""Get a related object
:param Model related_model: an sqlalchemy model
:param str related_id_field: the identifier field of the related model
:param DeclarativeMeta obj: the sqlalchemy object to retrieve related object... | python | {
"resource": ""
} |
q225407 | SqlalchemyDataLayer.apply_relationships | train | def apply_relationships(self, data, obj):
"""Apply relationship provided by data to obj
:param dict data: data provided by the client
:param DeclarativeMeta obj: the sqlalchemy object to plug relationships to
:return boolean: True if relationship have changed else False
"""
... | python | {
"resource": ""
} |
q225408 | SqlalchemyDataLayer.filter_query | train | def filter_query(self, query, filter_info, model):
"""Filter query according to jsonapi 1.0
:param Query query: sqlalchemy query to sort
:param filter_info: filter information
:type filter_info: dict or None
:param DeclarativeMeta model: an sqlalchemy model
:return Query... | python | {
"resource": ""
} |
q225409 | SqlalchemyDataLayer.sort_query | train | def sort_query(self, query, sort_info):
"""Sort query according to jsonapi 1.0
:param Query query: sqlalchemy query to sort
:param list sort_info: sort information
:return Query: the sorted query
"""
for sort_opt in sort_info:
field = sort_opt['field']
... | python | {
"resource": ""
} |
q225410 | SqlalchemyDataLayer.paginate_query | train | def paginate_query(self, query, paginate_info):
"""Paginate query according to jsonapi 1.0
:param Query query: sqlalchemy queryset
:param dict paginate_info: pagination information
:return Query: the paginated query
"""
if int(paginate_info.get('size', 1)) == 0:
... | python | {
"resource": ""
} |
q225411 | SqlalchemyDataLayer.eagerload_includes | train | def eagerload_includes(self, query, qs):
"""Use eagerload feature of sqlalchemy to optimize data retrieval for include querystring parameter
:param Query query: sqlalchemy queryset
:param QueryStringManager qs: a querystring manager to retrieve information from url
:return Query: the qu... | python | {
"resource": ""
} |
q225412 | SqlalchemyDataLayer.retrieve_object_query | train | def retrieve_object_query(self, view_kwargs, filter_field, filter_value):
"""Build query to retrieve object
:param dict view_kwargs: kwargs from the resource view
:params sqlalchemy_field filter_field: the field to filter on
:params filter_value: the value to filter with
:return... | python | {
"resource": ""
} |
q225413 | add_pagination_links | train | def add_pagination_links(data, object_count, querystring, base_url):
"""Add pagination links to result
:param dict data: the result of the view
:param int object_count: number of objects in result
:param QueryStringManager querystring: the managed querystring fields and values
:param str base_url: ... | python | {
"resource": ""
} |
q225414 | idfn | train | def idfn(fixture_params: Iterable[Any]) -> str:
"""
Function for pytest to produce uniform names for fixtures.
"""
return ":".join((str(item) for item in fixture_params)) | python | {
"resource": ""
} |
q225415 | get_fixtures_file_hash | train | def get_fixtures_file_hash(all_fixture_paths: Iterable[str]) -> str:
"""
Returns the MD5 hash of the fixture files. Used for cache busting.
"""
hasher = hashlib.md5()
for fixture_path in sorted(all_fixture_paths):
with open(fixture_path, 'rb') as fixture_file:
hasher.update(fixt... | python | {
"resource": ""
} |
q225416 | BaseTransaction.create_unsigned_transaction | train | def create_unsigned_transaction(cls,
*,
nonce: int,
gas_price: int,
gas: int,
to: Address,
value: int,
... | python | {
"resource": ""
} |
q225417 | HeaderChain.import_header | train | def import_header(self,
header: BlockHeader
) -> Tuple[Tuple[BlockHeader, ...], Tuple[BlockHeader, ...]]:
"""
Direct passthrough to `headerdb`
Also updates the local `header` property to be the latest canonical head.
Returns an iterable of he... | python | {
"resource": ""
} |
q225418 | BlockHeader.from_parent | train | def from_parent(cls,
parent: 'BlockHeader',
gas_limit: int,
difficulty: int,
timestamp: int,
coinbase: Address=ZERO_ADDRESS,
nonce: bytes=None,
extra_data: bytes=None,
... | python | {
"resource": ""
} |
q225419 | ChainDB.get_block_uncles | train | def get_block_uncles(self, uncles_hash: Hash32) -> List[BlockHeader]:
"""
Returns an iterable of uncle headers specified by the given uncles_hash
"""
validate_word(uncles_hash, title="Uncles Hash")
if uncles_hash == EMPTY_UNCLE_HASH:
return []
try:
... | python | {
"resource": ""
} |
q225420 | ChainDB.persist_block | train | def persist_block(self,
block: 'BaseBlock'
) -> Tuple[Tuple[Hash32, ...], Tuple[Hash32, ...]]:
"""
Persist the given block's header and uncles.
Assumes all block transactions have been persisted already.
"""
with self.db.atomic_batch()... | python | {
"resource": ""
} |
q225421 | ChainDB.persist_uncles | train | def persist_uncles(self, uncles: Tuple[BlockHeader]) -> Hash32:
"""
Persists the list of uncles to the database.
Returns the uncles hash.
"""
return self._persist_uncles(self.db, uncles) | python | {
"resource": ""
} |
q225422 | ChainDB.add_receipt | train | def add_receipt(self, block_header: BlockHeader, index_key: int, receipt: Receipt) -> Hash32:
"""
Adds the given receipt to the provided block header.
Returns the updated `receipts_root` for updated block header.
"""
receipt_db = HexaryTrie(db=self.db, root_hash=block_header.rec... | python | {
"resource": ""
} |
q225423 | ChainDB.add_transaction | train | def add_transaction(self,
block_header: BlockHeader,
index_key: int,
transaction: 'BaseTransaction') -> Hash32:
"""
Adds the given transaction to the provided block header.
Returns the updated `transactions_root` for update... | python | {
"resource": ""
} |
q225424 | ChainDB.get_block_transactions | train | def get_block_transactions(
self,
header: BlockHeader,
transaction_class: Type['BaseTransaction']) -> Iterable['BaseTransaction']:
"""
Returns an iterable of transactions for the block speficied by the
given block header.
"""
return self._get_b... | python | {
"resource": ""
} |
q225425 | ChainDB.get_block_transaction_hashes | train | def get_block_transaction_hashes(self, block_header: BlockHeader) -> Iterable[Hash32]:
"""
Returns an iterable of the transaction hashes from the block specified
by the given block header.
"""
return self._get_block_transaction_hashes(self.db, block_header) | python | {
"resource": ""
} |
q225426 | ChainDB.get_receipts | train | def get_receipts(self,
header: BlockHeader,
receipt_class: Type[Receipt]) -> Iterable[Receipt]:
"""
Returns an iterable of receipts for the block specified by the given
block header.
"""
receipt_db = HexaryTrie(db=self.db, root_hash=heade... | python | {
"resource": ""
} |
q225427 | ChainDB.get_transaction_by_index | train | def get_transaction_by_index(
self,
block_number: BlockNumber,
transaction_index: int,
transaction_class: Type['BaseTransaction']) -> 'BaseTransaction':
"""
Returns the transaction at the specified `transaction_index` from the
block specified by `b... | python | {
"resource": ""
} |
q225428 | ChainDB.get_receipt_by_index | train | def get_receipt_by_index(self,
block_number: BlockNumber,
receipt_index: int) -> Receipt:
"""
Returns the Receipt of the transaction at specified index
for the block header obtained by the specified block number
"""
try:
... | python | {
"resource": ""
} |
q225429 | ChainDB._get_block_transaction_data | train | def _get_block_transaction_data(db: BaseDB, transaction_root: Hash32) -> Iterable[Hash32]:
"""
Returns iterable of the encoded transactions for the given block header
"""
transaction_db = HexaryTrie(db, root_hash=transaction_root)
for transaction_idx in itertools.count():
... | python | {
"resource": ""
} |
q225430 | ChainDB._get_block_transactions | train | def _get_block_transactions(
self,
transaction_root: Hash32,
transaction_class: Type['BaseTransaction']) -> Iterable['BaseTransaction']:
"""
Memoizable version of `get_block_transactions`
"""
for encoded_transaction in self._get_block_transaction_data(... | python | {
"resource": ""
} |
q225431 | ChainDB._remove_transaction_from_canonical_chain | train | def _remove_transaction_from_canonical_chain(db: BaseDB, transaction_hash: Hash32) -> None:
"""
Removes the transaction specified by the given hash from the canonical
chain.
"""
db.delete(SchemaV1.make_transaction_hash_to_block_lookup_key(transaction_hash)) | python | {
"resource": ""
} |
q225432 | ChainDB.persist_trie_data_dict | train | def persist_trie_data_dict(self, trie_data_dict: Dict[Hash32, bytes]) -> None:
"""
Store raw trie data to db from a dict
"""
with self.db.atomic_batch() as db:
for key, value in trie_data_dict.items():
db[key] = value | python | {
"resource": ""
} |
q225433 | FrontierBlock.from_header | train | def from_header(cls, header: BlockHeader, chaindb: BaseChainDB) -> BaseBlock:
"""
Returns the block denoted by the given block header.
"""
if header.uncles_hash == EMPTY_UNCLE_HASH:
uncles = [] # type: List[BlockHeader]
else:
uncles = chaindb.get_block_un... | python | {
"resource": ""
} |
q225434 | shl | train | def shl(computation: BaseComputation) -> None:
"""
Bitwise left shift
"""
shift_length, value = computation.stack_pop(num_items=2, type_hint=constants.UINT256)
if shift_length >= 256:
result = 0
else:
result = (value << shift_length) & constants.UINT_256_MAX
computation.sta... | python | {
"resource": ""
} |
q225435 | sar | train | def sar(computation: BaseComputation) -> None:
"""
Arithmetic bitwise right shift
"""
shift_length, value = computation.stack_pop(num_items=2, type_hint=constants.UINT256)
value = unsigned_to_signed(value)
if shift_length >= 256:
result = 0 if value >= 0 else constants.UINT_255_NEGATIVE... | python | {
"resource": ""
} |
q225436 | compute_frontier_difficulty | train | def compute_frontier_difficulty(parent_header: BlockHeader, timestamp: int) -> int:
"""
Computes the difficulty for a frontier block based on the parent block.
"""
validate_gt(timestamp, parent_header.timestamp, title="Header timestamp")
offset = parent_header.difficulty // DIFFICULTY_ADJUSTMENT_DE... | python | {
"resource": ""
} |
q225437 | FrontierTransactionExecutor.build_computation | train | def build_computation(self,
message: Message,
transaction: BaseOrSpoofTransaction) -> BaseComputation:
"""Apply the message to the VM."""
transaction_context = self.vm_state.get_transaction_context(transaction)
if message.is_create:
... | python | {
"resource": ""
} |
q225438 | Stack.push | train | def push(self, value: Union[int, bytes]) -> None:
"""
Push an item onto the stack.
"""
if len(self.values) > 1023:
raise FullStack('Stack limit reached')
validate_stack_item(value)
self.values.append(value) | python | {
"resource": ""
} |
q225439 | Stack.pop | train | def pop(self,
num_items: int,
type_hint: str) -> Union[int, bytes, Tuple[Union[int, bytes], ...]]:
"""
Pop an item off the stack.
Note: This function is optimized for speed over readability.
"""
try:
if num_items == 1:
return n... | python | {
"resource": ""
} |
q225440 | Stack.swap | train | def swap(self, position: int) -> None:
"""
Perform a SWAP operation on the stack.
"""
idx = -1 * position - 1
try:
self.values[-1], self.values[idx] = self.values[idx], self.values[-1]
except IndexError:
raise InsufficientStack("Insufficient stack ... | python | {
"resource": ""
} |
q225441 | Stack.dup | train | def dup(self, position: int) -> None:
"""
Perform a DUP operation on the stack.
"""
idx = -1 * position
try:
self.push(self.values[idx])
except IndexError:
raise InsufficientStack("Insufficient stack items for DUP{0}".format(position)) | python | {
"resource": ""
} |
q225442 | HeaderDB.get_canonical_block_hash | train | def get_canonical_block_hash(self, block_number: BlockNumber) -> Hash32:
"""
Returns the block hash for the canonical block at the given number.
Raises BlockNotFound if there's no block header with the given number in the
canonical chain.
"""
return self._get_canonical_b... | python | {
"resource": ""
} |
q225443 | HeaderDB.get_canonical_block_header_by_number | train | def get_canonical_block_header_by_number(self, block_number: BlockNumber) -> BlockHeader:
"""
Returns the block header with the given number in the canonical chain.
Raises BlockNotFound if there's no block header with the given number in the
canonical chain.
"""
return s... | python | {
"resource": ""
} |
q225444 | HeaderDB.persist_header_chain | train | def persist_header_chain(self,
headers: Iterable[BlockHeader]
) -> Tuple[Tuple[BlockHeader, ...], Tuple[BlockHeader, ...]]:
"""
Return two iterable of headers, the first containing the new canonical headers,
the second containing the old ... | python | {
"resource": ""
} |
q225445 | HeaderDB._set_as_canonical_chain_head | train | def _set_as_canonical_chain_head(cls, db: BaseDB, block_hash: Hash32
) -> Tuple[Tuple[BlockHeader, ...], Tuple[BlockHeader, ...]]:
"""
Sets the canonical chain HEAD to the block header as specified by the
given block hash.
:return: a tuple of the hea... | python | {
"resource": ""
} |
q225446 | HeaderDB._add_block_number_to_hash_lookup | train | def _add_block_number_to_hash_lookup(db: BaseDB, header: BlockHeader) -> None:
"""
Sets a record in the database to allow looking up this header by its
block number.
"""
block_number_to_hash_key = SchemaV1.make_block_number_to_hash_lookup_key(
header.block_number
... | python | {
"resource": ""
} |
q225447 | compute_gas_limit_bounds | train | def compute_gas_limit_bounds(parent: BlockHeader) -> Tuple[int, int]:
"""
Compute the boundaries for the block gas limit based on the parent block.
"""
boundary_range = parent.gas_limit // GAS_LIMIT_ADJUSTMENT_FACTOR
upper_bound = parent.gas_limit + boundary_range
lower_bound = max(GAS_LIMIT_MIN... | python | {
"resource": ""
} |
q225448 | compute_gas_limit | train | def compute_gas_limit(parent_header: BlockHeader, gas_limit_floor: int) -> int:
"""
A simple strategy for adjusting the gas limit.
For each block:
- decrease by 1/1024th of the gas limit from the previous block
- increase by 50% of the total gas used by the previous block
If the value is less... | python | {
"resource": ""
} |
q225449 | generate_header_from_parent_header | train | def generate_header_from_parent_header(
compute_difficulty_fn: Callable[[BlockHeader, int], int],
parent_header: BlockHeader,
coinbase: Address,
timestamp: Optional[int] = None,
extra_data: bytes = b'') -> BlockHeader:
"""
Generate BlockHeader from state_root and parent_h... | python | {
"resource": ""
} |
q225450 | state_definition_to_dict | train | def state_definition_to_dict(state_definition: GeneralState) -> AccountState:
"""Convert a state definition to the canonical dict form.
State can either be defined in the canonical form, or as a list of sub states that are then
merged to one. Sub states can either be given as dictionaries themselves, or as... | python | {
"resource": ""
} |
q225451 | Journal.record_changeset | train | def record_changeset(self, custom_changeset_id: uuid.UUID = None) -> uuid.UUID:
"""
Creates a new changeset. Changesets are referenced by a random uuid4
to prevent collisions between multiple changesets.
"""
if custom_changeset_id is not None:
if custom_changeset_id i... | python | {
"resource": ""
} |
q225452 | Journal.pop_changeset | train | def pop_changeset(self, changeset_id: uuid.UUID) -> Dict[bytes, Union[bytes, DeletedEntry]]:
"""
Returns all changes from the given changeset. This includes all of
the changes from any subsequent changeset, giving precidence to
later changesets.
"""
if changeset_id not i... | python | {
"resource": ""
} |
q225453 | Journal.commit_changeset | train | def commit_changeset(self, changeset_id: uuid.UUID) -> Dict[bytes, Union[bytes, DeletedEntry]]:
"""
Collapses all changes for the given changeset into the previous
changesets if it exists.
"""
does_clear = self.has_clear(changeset_id)
changeset_data = self.pop_changeset(c... | python | {
"resource": ""
} |
q225454 | JournalDB._validate_changeset | train | def _validate_changeset(self, changeset_id: uuid.UUID) -> None:
"""
Checks to be sure the changeset is known by the journal
"""
if not self.journal.has_changeset(changeset_id):
raise ValidationError("Changeset not found in journal: {0}".format(
str(changeset_i... | python | {
"resource": ""
} |
q225455 | JournalDB.record | train | def record(self, custom_changeset_id: uuid.UUID = None) -> uuid.UUID:
"""
Starts a new recording and returns an id for the associated changeset
"""
return self.journal.record_changeset(custom_changeset_id) | python | {
"resource": ""
} |
q225456 | JournalDB.discard | train | def discard(self, changeset_id: uuid.UUID) -> None:
"""
Throws away all journaled data starting at the given changeset
"""
self._validate_changeset(changeset_id)
self.journal.pop_changeset(changeset_id) | python | {
"resource": ""
} |
q225457 | JournalDB.commit | train | def commit(self, changeset_id: uuid.UUID) -> None:
"""
Commits a given changeset. This merges the given changeset and all
subsequent changesets into the previous changeset giving precidence
to later changesets in case of any conflicting keys.
If this is the base changeset then a... | python | {
"resource": ""
} |
q225458 | FQP_point_to_FQ2_point | train | def FQP_point_to_FQ2_point(pt: Tuple[FQP, FQP, FQP]) -> Tuple[FQ2, FQ2, FQ2]:
"""
Transform FQP to FQ2 for type hinting.
"""
return (
FQ2(pt[0].coeffs),
FQ2(pt[1].coeffs),
FQ2(pt[2].coeffs),
) | python | {
"resource": ""
} |
q225459 | Opcode.as_opcode | train | def as_opcode(cls: Type[T],
logic_fn: Callable[..., Any],
mnemonic: str,
gas_cost: int) -> Type[T]:
"""
Class factory method for turning vanilla functions into Opcode classes.
"""
if gas_cost:
@functools.wraps(logic_fn)
... | python | {
"resource": ""
} |
q225460 | AccountDB._wipe_storage | train | def _wipe_storage(self, address: Address) -> None:
"""
Wipe out the storage, without explicitly handling the storage root update
"""
account_store = self._get_address_store(address)
self._dirty_accounts.add(address)
account_store.delete() | python | {
"resource": ""
} |
q225461 | setup_main_filler | train | def setup_main_filler(name: str, environment: Dict[Any, Any]=None) -> Dict[str, Dict[str, Any]]:
"""
Kick off the filler generation process by creating the general filler scaffold with
a test name and general information about the testing environment.
For tests for the main chain, the `environment` par... | python | {
"resource": ""
} |
q225462 | pre_state | train | def pre_state(*raw_state: GeneralState, filler: Dict[str, Any]) -> None:
"""
Specify the state prior to the test execution. Multiple invocations don't override
the state but extend it instead.
In general, the elements of `state_definitions` are nested dictionaries of the following form:
.. code-bl... | python | {
"resource": ""
} |
q225463 | expect | train | def expect(post_state: Dict[str, Any]=None,
networks: Any=None,
transaction: TransactionDict=None) -> Callable[..., Dict[str, Any]]:
"""
Specify the expected result for the test.
For state tests, multiple expectations can be given, differing in the transaction data, gas
limit, an... | python | {
"resource": ""
} |
q225464 | calldataload | train | def calldataload(computation: BaseComputation) -> None:
"""
Load call data into memory.
"""
start_position = computation.stack_pop(type_hint=constants.UINT256)
value = computation.msg.data_as_bytes[start_position:start_position + 32]
padded_value = value.ljust(32, b'\x00')
normalized_value ... | python | {
"resource": ""
} |
q225465 | clamp | train | def clamp(inclusive_lower_bound: int,
inclusive_upper_bound: int,
value: int) -> int:
"""
Bound the given ``value`` between ``inclusive_lower_bound`` and
``inclusive_upper_bound``.
"""
if value <= inclusive_lower_bound:
return inclusive_lower_bound
elif value >= inclu... | python | {
"resource": ""
} |
q225466 | integer_squareroot | train | def integer_squareroot(value: int) -> int:
"""
Return the integer square root of ``value``.
Uses Python's decimal module to compute the square root of ``value`` with
a precision of 128-bits. The value 128 is chosen since the largest square
root of a 256-bit integer is a 128-bit integer.
"""
... | python | {
"resource": ""
} |
q225467 | AtomicDBWriteBatch._commit_unless_raises | train | def _commit_unless_raises(cls, write_target_db: BaseDB) -> Iterator['AtomicDBWriteBatch']:
"""
Commit all writes inside the context, unless an exception was raised.
Although this is technically an external API, it (and this whole class) is only intended
to be used by AtomicDB.
"... | python | {
"resource": ""
} |
q225468 | slt | train | def slt(computation: BaseComputation) -> None:
"""
Signed Lesser Comparison
"""
left, right = map(
unsigned_to_signed,
computation.stack_pop(num_items=2, type_hint=constants.UINT256),
)
if left < right:
result = 1
else:
result = 0
computation.stack_push(... | python | {
"resource": ""
} |
q225469 | build | train | def build(obj: Any, *applicators: Callable[..., Any]) -> Any:
"""
Run the provided object through the series of applicator functions.
If ``obj`` is an instances of :class:`~eth.chains.base.BaseChain` the
applicators will be run on a copy of the chain and thus will not mutate the
provided chain inst... | python | {
"resource": ""
} |
q225470 | name | train | def name(class_name: str, chain_class: Type[BaseChain]) -> Type[BaseChain]:
"""
Assign the given name to the chain class.
"""
return chain_class.configure(__name__=class_name) | python | {
"resource": ""
} |
q225471 | chain_id | train | def chain_id(chain_id: int, chain_class: Type[BaseChain]) -> Type[BaseChain]:
"""
Set the ``chain_id`` for the chain class.
"""
return chain_class.configure(chain_id=chain_id) | python | {
"resource": ""
} |
q225472 | fork_at | train | def fork_at(vm_class: Type[BaseVM], at_block: int, chain_class: Type[BaseChain]) -> Type[BaseChain]:
"""
Adds the ``vm_class`` to the chain's ``vm_configuration``.
.. code-block:: python
from eth.chains.base import MiningChain
from eth.tools.builder.chain import build, fork_at
Fro... | python | {
"resource": ""
} |
q225473 | enable_pow_mining | train | def enable_pow_mining(chain_class: Type[BaseChain]) -> Type[BaseChain]:
"""
Inject on demand generation of the proof of work mining seal on newly
mined blocks into each of the chain's vms.
"""
if not chain_class.vm_configuration:
raise ValidationError("Chain class has no vm_configuration")
... | python | {
"resource": ""
} |
q225474 | disable_pow_check | train | def disable_pow_check(chain_class: Type[BaseChain]) -> Type[BaseChain]:
"""
Disable the proof of work validation check for each of the chain's vms.
This allows for block mining without generation of the proof of work seal.
.. note::
blocks mined this way will not be importable on any chain tha... | python | {
"resource": ""
} |
q225475 | genesis | train | def genesis(chain_class: BaseChain,
db: BaseAtomicDB=None,
params: Dict[str, HeaderParams]=None,
state: GeneralState=None) -> BaseChain:
"""
Initialize the given chain class with the given genesis header parameters
and chain state.
"""
if state is None:
ge... | python | {
"resource": ""
} |
q225476 | mine_block | train | def mine_block(chain: MiningChain, **kwargs: Any) -> MiningChain:
"""
Mine a new block on the chain. Header parameters for the new block can be
overridden using keyword arguments.
"""
if not isinstance(chain, MiningChain):
raise ValidationError('`mine_block` may only be used on MiningChain... | python | {
"resource": ""
} |
q225477 | import_block | train | def import_block(block: BaseBlock, chain: BaseChain) -> BaseChain:
"""
Import the provided ``block`` into the chain.
"""
chain.import_block(block)
return chain | python | {
"resource": ""
} |
q225478 | copy | train | def copy(chain: MiningChain) -> MiningChain:
"""
Make a copy of the chain at the given state. Actions performed on the
resulting chain will not affect the original chain.
"""
if not isinstance(chain, MiningChain):
raise ValidationError("`at_block_number` may only be used with 'MiningChain")... | python | {
"resource": ""
} |
q225479 | chain_split | train | def chain_split(*splits: Iterable[Callable[..., Any]]) -> Callable[[BaseChain], Iterable[BaseChain]]: # noqa: E501
"""
Construct and execute multiple concurrent forks of the chain.
Any number of forks may be executed. For each fork, provide an iterable of
commands.
Returns the resulting chain o... | python | {
"resource": ""
} |
q225480 | at_block_number | train | def at_block_number(block_number: BlockNumber, chain: MiningChain) -> MiningChain:
"""
Rewind the chain back to the given block number. Calls to things like
``get_canonical_head`` will still return the canonical head of the chain,
however, you can use ``mine_block`` to mine fork chains.
"""
if ... | python | {
"resource": ""
} |
q225481 | load_json_fixture | train | def load_json_fixture(fixture_path: str) -> Dict[str, Any]:
"""
Loads a fixture file, caching the most recent files it loaded.
"""
with open(fixture_path) as fixture_file:
file_fixtures = json.load(fixture_file)
return file_fixtures | python | {
"resource": ""
} |
q225482 | load_fixture | train | def load_fixture(fixture_path: str,
fixture_key: str,
normalize_fn: Callable[..., Any]=identity) -> Dict[str, Any]:
"""
Loads a specific fixture from a fixture file, optionally passing it through
a normalization function.
"""
file_fixtures = load_json_fixture(fixtur... | python | {
"resource": ""
} |
q225483 | construct_evm_runtime_identifier | train | def construct_evm_runtime_identifier() -> str:
"""
Constructs the EVM runtime identifier string
e.g. 'Py-EVM/v1.2.3/darwin-amd64/python3.6.5'
"""
return "Py-EVM/{0}/{platform}/{imp.name}{v.major}.{v.minor}.{v.micro}".format(
__version__,
platform=sys.platform,
v=sys.version_... | python | {
"resource": ""
} |
q225484 | binary_gas_search | train | def binary_gas_search(state: BaseState, transaction: BaseTransaction, tolerance: int=1) -> int:
"""
Run the transaction with various gas limits, progressively
approaching the minimum needed to succeed without an OutOfGas exception.
The starting range of possible estimates is:
[transaction.intrinsic... | python | {
"resource": ""
} |
q225485 | StorageLookup.commit_to | train | def commit_to(self, db: BaseDB) -> None:
"""
Trying to commit changes when nothing has been written will raise a
ValidationError
"""
self.logger.debug2('persist storage root to data store')
if self._trie_nodes_batch is None:
raise ValidationError(
... | python | {
"resource": ""
} |
q225486 | AccountStorageDB._validate_flushed | train | def _validate_flushed(self) -> None:
"""
Will raise an exception if there are some changes made since the last persist.
"""
journal_diff = self._journal_storage.diff()
if len(journal_diff) > 0:
raise ValidationError(
"StorageDB had a dirty journal when... | python | {
"resource": ""
} |
q225487 | Memory.write | train | def write(self, start_position: int, size: int, value: bytes) -> None:
"""
Write `value` into memory.
"""
if size:
validate_uint256(start_position)
validate_uint256(size)
validate_is_bytes(value)
validate_length(value, length=size)
... | python | {
"resource": ""
} |
q225488 | Memory.read | train | def read(self, start_position: int, size: int) -> memoryview:
"""
Return a view into the memory
"""
return memoryview(self._bytes)[start_position:start_position + size] | python | {
"resource": ""
} |
q225489 | Memory.read_bytes | train | def read_bytes(self, start_position: int, size: int) -> bytes:
"""
Read a value from memory and return a fresh bytes instance
"""
return bytes(self._bytes[start_position:start_position + size]) | python | {
"resource": ""
} |
q225490 | BaseComputation.extend_memory | train | def extend_memory(self, start_position: int, size: int) -> None:
"""
Extend the size of the memory to be at minimum ``start_position + size``
bytes in length. Raise `eth.exceptions.OutOfGas` if there is not enough
gas to pay for extending the memory.
"""
validate_uint256... | python | {
"resource": ""
} |
q225491 | BaseComputation.memory_read | train | def memory_read(self, start_position: int, size: int) -> memoryview:
"""
Read and return a view of ``size`` bytes from memory starting at ``start_position``.
"""
return self._memory.read(start_position, size) | python | {
"resource": ""
} |
q225492 | BaseComputation.memory_read_bytes | train | def memory_read_bytes(self, start_position: int, size: int) -> bytes:
"""
Read and return ``size`` bytes from memory starting at ``start_position``.
"""
return self._memory.read_bytes(start_position, size) | python | {
"resource": ""
} |
q225493 | BaseComputation.consume_gas | train | def consume_gas(self, amount: int, reason: str) -> None:
"""
Consume ``amount`` of gas from the remaining gas.
Raise `eth.exceptions.OutOfGas` if there is not enough gas remaining.
"""
return self._gas_meter.consume_gas(amount, reason) | python | {
"resource": ""
} |
q225494 | BaseComputation.stack_pop | train | def stack_pop(self, num_items: int=1, type_hint: str=None) -> Any:
# TODO: Needs to be replaced with
# `Union[int, bytes, Tuple[Union[int, bytes], ...]]` if done properly
"""
Pop and return a number of items equal to ``num_items`` from the stack.
``type_hint`` can be either ``'ui... | python | {
"resource": ""
} |
q225495 | BaseComputation.stack_push | train | def stack_push(self, value: Union[int, bytes]) -> None:
"""
Push ``value`` onto the stack.
Raise `eth.exceptions.StackDepthLimit` if the stack is full.
"""
return self._stack.push(value) | python | {
"resource": ""
} |
q225496 | BaseComputation.prepare_child_message | train | def prepare_child_message(self,
gas: int,
to: Address,
value: int,
data: BytesOrView,
code: bytes,
**kwargs: Any) -> Message:
"""
... | python | {
"resource": ""
} |
q225497 | BaseComputation.apply_child_computation | train | def apply_child_computation(self, child_msg: Message) -> 'BaseComputation':
"""
Apply the vm message ``child_msg`` as a child computation.
"""
child_computation = self.generate_child_computation(child_msg)
self.add_child_computation(child_computation)
return child_computa... | python | {
"resource": ""
} |
q225498 | BaseComputation._get_log_entries | train | def _get_log_entries(self) -> List[Tuple[int, bytes, List[int], bytes]]:
"""
Return the log entries for this computation and its children.
They are sorted in the same order they were emitted during the transaction processing, and
include the sequential counter as the first element of th... | python | {
"resource": ""
} |
q225499 | BaseComputation.apply_computation | train | def apply_computation(cls,
state: BaseState,
message: Message,
transaction_context: BaseTransactionContext) -> 'BaseComputation':
"""
Perform the computation that would be triggered by the VM message.
"""
with ... | python | {
"resource": ""
} |
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