id int32 0 252k | repo stringlengths 7 55 | path stringlengths 4 127 | func_name stringlengths 1 88 | original_string stringlengths 75 19.8k | language stringclasses 1
value | code stringlengths 75 19.8k | code_tokens list | docstring stringlengths 3 17.3k | docstring_tokens list | sha stringlengths 40 40 | url stringlengths 87 242 |
|---|---|---|---|---|---|---|---|---|---|---|---|
230,100 | ethereum/py-evm | eth/vm/stack.py | Stack.swap | 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 | 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 ... | [
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230,101 | ethereum/py-evm | eth/vm/stack.py | Stack.dup | 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 | 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)) | [
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230,102 | ethereum/py-evm | eth/db/header.py | HeaderDB.get_canonical_block_hash | 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 | 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... | [
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230,103 | ethereum/py-evm | eth/db/header.py | HeaderDB.get_canonical_block_header_by_number | 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 | 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.
"""
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230,104 | ethereum/py-evm | eth/db/header.py | HeaderDB.persist_header_chain | 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 | 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,
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230,105 | ethereum/py-evm | eth/db/header.py | HeaderDB._set_as_canonical_chain_head | 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 | 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... | [
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230,106 | ethereum/py-evm | eth/db/header.py | HeaderDB._add_block_number_to_hash_lookup | 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 | 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
... | [
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230,107 | ethereum/py-evm | eth/_utils/headers.py | compute_gas_limit_bounds | 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 | 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... | [
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230,108 | ethereum/py-evm | eth/_utils/headers.py | compute_gas_limit | 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 | 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... | [
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230,109 | ethereum/py-evm | eth/_utils/headers.py | generate_header_from_parent_header | 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 | 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... | [
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230,110 | ethereum/py-evm | eth/tools/_utils/normalization.py | state_definition_to_dict | 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 | 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... | [
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230,111 | ethereum/py-evm | eth/db/journal.py | Journal.record_changeset | 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 | 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... | [
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230,112 | ethereum/py-evm | eth/db/journal.py | Journal.pop_changeset | 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 | 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
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"""
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230,113 | ethereum/py-evm | eth/db/journal.py | Journal.commit_changeset | 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 | 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... | [
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230,114 | ethereum/py-evm | eth/db/journal.py | JournalDB._validate_changeset | 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 | 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(
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230,115 | ethereum/py-evm | eth/db/journal.py | JournalDB.record | 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 | 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) | [
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230,116 | ethereum/py-evm | eth/db/journal.py | JournalDB.discard | def discard(self, changeset_id: uuid.UUID) -> None:
"""
Throws away all journaled data starting at the given changeset
"""
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"""
Throws away all journaled data starting at the given changeset
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230,117 | ethereum/py-evm | eth/db/journal.py | JournalDB.commit | def commit(self, changeset_id: uuid.UUID) -> None:
"""
Commits a given changeset. This merges the given changeset and all
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to later changesets in case of any conflicting keys.
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"""
Commits a given changeset. This merges the given changeset and all
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230,118 | ethereum/py-evm | eth/_utils/bn128.py | FQP_point_to_FQ2_point | 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 | 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),
) | [
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230,119 | ethereum/py-evm | eth/vm/opcode.py | Opcode.as_opcode | 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 | 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)
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230,120 | ethereum/py-evm | eth/db/account.py | AccountDB._wipe_storage | 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 | 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)
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230,121 | ethereum/py-evm | eth/tools/fixtures/fillers/common.py | setup_main_filler | 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 | 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
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230,122 | ethereum/py-evm | eth/tools/fixtures/fillers/common.py | pre_state | 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 | 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.
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230,123 | ethereum/py-evm | eth/tools/fixtures/fillers/common.py | expect | 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 | 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.
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230,124 | ethereum/py-evm | eth/vm/logic/context.py | calldataload | 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 | 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')
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230,125 | ethereum/py-evm | eth/_utils/numeric.py | clamp | 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 | 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
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230,126 | ethereum/py-evm | eth/_utils/numeric.py | integer_squareroot | 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 | 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.
"""
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230,127 | ethereum/py-evm | eth/db/atomic.py | AtomicDBWriteBatch._commit_unless_raises | 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 | 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
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230,128 | ethereum/py-evm | eth/vm/logic/comparison.py | slt | def slt(computation: BaseComputation) -> None:
"""
Signed Lesser Comparison
"""
left, right = map(
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computation.stack_pop(num_items=2, type_hint=constants.UINT256),
)
if left < right:
result = 1
else:
result = 0
computation.stack_push(... | python | 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
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230,129 | ethereum/py-evm | eth/tools/builder/chain/builders.py | build | 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 | def build(obj: Any, *applicators: Callable[..., Any]) -> Any:
"""
Run the provided object through the series of applicator functions.
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230,130 | ethereum/py-evm | eth/tools/builder/chain/builders.py | name | 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 | 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) | [
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230,131 | ethereum/py-evm | eth/tools/builder/chain/builders.py | chain_id | 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 | 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) | [
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230,132 | ethereum/py-evm | eth/tools/builder/chain/builders.py | fork_at | 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 | 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... | [
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from eth.tools.builder.chain import build, fork_at
FrontierOnlyChain = build(MiningChain, fork_at(FrontierVM, 0))
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230,133 | ethereum/py-evm | eth/tools/builder/chain/builders.py | enable_pow_mining | 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 | 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")
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230,134 | ethereum/py-evm | eth/tools/builder/chain/builders.py | disable_pow_check | 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 | 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... | [
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230,135 | ethereum/py-evm | eth/tools/builder/chain/builders.py | genesis | 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 | 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... | [
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230,136 | ethereum/py-evm | eth/tools/builder/chain/builders.py | mine_block | 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 | 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... | [
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230,137 | ethereum/py-evm | eth/tools/builder/chain/builders.py | import_block | def import_block(block: BaseBlock, chain: BaseChain) -> BaseChain:
"""
Import the provided ``block`` into the chain.
"""
chain.import_block(block)
return chain | python | def import_block(block: BaseBlock, chain: BaseChain) -> BaseChain:
"""
Import the provided ``block`` into the chain.
"""
chain.import_block(block)
return chain | [
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230,138 | ethereum/py-evm | eth/tools/builder/chain/builders.py | copy | 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 | 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")... | [
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230,139 | ethereum/py-evm | eth/tools/builder/chain/builders.py | chain_split | 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 | 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
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.. code-block:: python
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230,140 | ethereum/py-evm | eth/tools/builder/chain/builders.py | at_block_number | 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 | 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 ... | [
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230,141 | ethereum/py-evm | eth/tools/fixtures/loading.py | load_json_fixture | 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 | 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 | [
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230,142 | ethereum/py-evm | eth/tools/fixtures/loading.py | load_fixture | 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 | 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
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"""
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230,143 | ethereum/py-evm | eth/_utils/version.py | construct_evm_runtime_identifier | 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 | 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,
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230,144 | ethereum/py-evm | eth/estimators/gas.py | binary_gas_search | 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 | 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:
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230,145 | ethereum/py-evm | eth/db/storage.py | StorageLookup.commit_to | 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 | 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(
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230,146 | ethereum/py-evm | eth/db/storage.py | AccountStorageDB._validate_flushed | 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 | def _validate_flushed(self) -> None:
"""
Will raise an exception if there are some changes made since the last persist.
"""
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230,147 | ethereum/py-evm | eth/vm/memory.py | Memory.write | 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 | 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)
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230,148 | ethereum/py-evm | eth/vm/memory.py | Memory.read | 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 | def read(self, start_position: int, size: int) -> memoryview:
"""
Return a view into the memory
"""
return memoryview(self._bytes)[start_position:start_position + size] | [
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230,149 | ethereum/py-evm | eth/vm/memory.py | Memory.read_bytes | 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 | def read_bytes(self, start_position: int, size: int) -> bytes:
"""
Read a value from memory and return a fresh bytes instance
"""
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230,150 | ethereum/py-evm | eth/vm/computation.py | BaseComputation.extend_memory | 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 | 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.
"""
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230,151 | ethereum/py-evm | eth/vm/computation.py | BaseComputation.memory_read | 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 | 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) | [
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230,152 | ethereum/py-evm | eth/vm/computation.py | BaseComputation.memory_read_bytes | 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 | 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) | [
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230,153 | ethereum/py-evm | eth/vm/computation.py | BaseComputation.consume_gas | 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 | 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) | [
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230,154 | ethereum/py-evm | eth/vm/computation.py | BaseComputation.stack_pop | 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 | 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... | [
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230,155 | ethereum/py-evm | eth/vm/computation.py | BaseComputation.stack_push | 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 | 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) | [
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230,156 | ethereum/py-evm | eth/vm/computation.py | BaseComputation.prepare_child_message | def prepare_child_message(self,
gas: int,
to: Address,
value: int,
data: BytesOrView,
code: bytes,
**kwargs: Any) -> Message:
"""
... | python | def prepare_child_message(self,
gas: int,
to: Address,
value: int,
data: BytesOrView,
code: bytes,
**kwargs: Any) -> Message:
"""
... | [
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230,157 | ethereum/py-evm | eth/vm/computation.py | BaseComputation.apply_child_computation | 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 | 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)
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230,158 | ethereum/py-evm | eth/vm/computation.py | BaseComputation._get_log_entries | 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 | 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... | [
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230,159 | ethereum/py-evm | eth/vm/computation.py | BaseComputation.apply_computation | 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 | def apply_computation(cls,
state: BaseState,
message: Message,
transaction_context: BaseTransactionContext) -> 'BaseComputation':
"""
Perform the computation that would be triggered by the VM message.
"""
with ... | [
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230,160 | ethereum/py-evm | eth/vm/forks/homestead/headers.py | compute_homestead_difficulty | def compute_homestead_difficulty(parent_header: BlockHeader, timestamp: int) -> int:
"""
Computes the difficulty for a homestead block based on the parent block.
"""
parent_tstamp = parent_header.timestamp
validate_gt(timestamp, parent_tstamp, title="Header.timestamp")
offset = parent_header.dif... | python | def compute_homestead_difficulty(parent_header: BlockHeader, timestamp: int) -> int:
"""
Computes the difficulty for a homestead block based on the parent block.
"""
parent_tstamp = parent_header.timestamp
validate_gt(timestamp, parent_tstamp, title="Header.timestamp")
offset = parent_header.dif... | [
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230,161 | ethereum/py-evm | eth/vm/state.py | BaseState.snapshot | def snapshot(self) -> Tuple[Hash32, UUID]:
"""
Perform a full snapshot of the current state.
Snapshots are a combination of the :attr:`~state_root` at the time of the
snapshot and the id of the changeset from the journaled DB.
"""
return self.state_root, self._account_db... | python | def snapshot(self) -> Tuple[Hash32, UUID]:
"""
Perform a full snapshot of the current state.
Snapshots are a combination of the :attr:`~state_root` at the time of the
snapshot and the id of the changeset from the journaled DB.
"""
return self.state_root, self._account_db... | [
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230,162 | ethereum/py-evm | eth/vm/state.py | BaseState.revert | def revert(self, snapshot: Tuple[Hash32, UUID]) -> None:
"""
Revert the VM to the state at the snapshot
"""
state_root, account_snapshot = snapshot
# first revert the database state root.
self._account_db.state_root = state_root
# now roll the underlying database... | python | def revert(self, snapshot: Tuple[Hash32, UUID]) -> None:
"""
Revert the VM to the state at the snapshot
"""
state_root, account_snapshot = snapshot
# first revert the database state root.
self._account_db.state_root = state_root
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230,163 | ethereum/py-evm | eth/vm/state.py | BaseState.get_computation | def get_computation(self,
message: Message,
transaction_context: 'BaseTransactionContext') -> 'BaseComputation':
"""
Return a computation instance for the given `message` and `transaction_context`
"""
if self.computation_class is None:
... | python | def get_computation(self,
message: Message,
transaction_context: 'BaseTransactionContext') -> 'BaseComputation':
"""
Return a computation instance for the given `message` and `transaction_context`
"""
if self.computation_class is None:
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230,164 | ethereum/py-evm | eth/vm/state.py | BaseState.apply_transaction | def apply_transaction(
self,
transaction: BaseOrSpoofTransaction) -> 'BaseComputation':
"""
Apply transaction to the vm state
:param transaction: the transaction to apply
:return: the computation
"""
if self.state_root != BLANK_ROOT_HASH and not s... | python | def apply_transaction(
self,
transaction: BaseOrSpoofTransaction) -> 'BaseComputation':
"""
Apply transaction to the vm state
:param transaction: the transaction to apply
:return: the computation
"""
if self.state_root != BLANK_ROOT_HASH and not s... | [
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230,165 | ethereum/py-evm | eth/_utils/env.py | get_env_value | def get_env_value(name: str, required: bool=False, default: Any=empty) -> str:
"""
Core function for extracting the environment variable.
Enforces mutual exclusivity between `required` and `default` keywords.
The `empty` sentinal value is used as the default `default` value to allow
other function... | python | def get_env_value(name: str, required: bool=False, default: Any=empty) -> str:
"""
Core function for extracting the environment variable.
Enforces mutual exclusivity between `required` and `default` keywords.
The `empty` sentinal value is used as the default `default` value to allow
other function... | [
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230,166 | ethereum/py-evm | eth/vm/base.py | BaseVM.make_receipt | def make_receipt(self,
base_header: BlockHeader,
transaction: BaseTransaction,
computation: BaseComputation,
state: BaseState) -> Receipt:
"""
Generate the receipt resulting from applying the transaction.
:param... | python | def make_receipt(self,
base_header: BlockHeader,
transaction: BaseTransaction,
computation: BaseComputation,
state: BaseState) -> Receipt:
"""
Generate the receipt resulting from applying the transaction.
:param... | [
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:param base_header: the header of the block before the transaction was applied.
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230,167 | ethereum/py-evm | eth/vm/base.py | VM.execute_bytecode | def execute_bytecode(self,
origin: Address,
gas_price: int,
gas: int,
to: Address,
sender: Address,
value: int,
data: bytes,
... | python | def execute_bytecode(self,
origin: Address,
gas_price: int,
gas: int,
to: Address,
sender: Address,
value: int,
data: bytes,
... | [
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230,168 | ethereum/py-evm | eth/vm/base.py | VM.import_block | def import_block(self, block: BaseBlock) -> BaseBlock:
"""
Import the given block to the chain.
"""
if self.block.number != block.number:
raise ValidationError(
"This VM can only import blocks at number #{}, the attempted block was #{}".format(
... | python | def import_block(self, block: BaseBlock) -> BaseBlock:
"""
Import the given block to the chain.
"""
if self.block.number != block.number:
raise ValidationError(
"This VM can only import blocks at number #{}, the attempted block was #{}".format(
... | [
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230,169 | ethereum/py-evm | eth/vm/base.py | VM.mine_block | def mine_block(self, *args: Any, **kwargs: Any) -> BaseBlock:
"""
Mine the current block. Proxies to self.pack_block method.
"""
packed_block = self.pack_block(self.block, *args, **kwargs)
final_block = self.finalize_block(packed_block)
# Perform validation
self... | python | def mine_block(self, *args: Any, **kwargs: Any) -> BaseBlock:
"""
Mine the current block. Proxies to self.pack_block method.
"""
packed_block = self.pack_block(self.block, *args, **kwargs)
final_block = self.finalize_block(packed_block)
# Perform validation
self... | [
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230,170 | ethereum/py-evm | eth/vm/base.py | VM.finalize_block | def finalize_block(self, block: BaseBlock) -> BaseBlock:
"""
Perform any finalization steps like awarding the block mining reward,
and persisting the final state root.
"""
if block.number > 0:
self._assign_block_rewards(block)
# We need to call `persist` here... | python | def finalize_block(self, block: BaseBlock) -> BaseBlock:
"""
Perform any finalization steps like awarding the block mining reward,
and persisting the final state root.
"""
if block.number > 0:
self._assign_block_rewards(block)
# We need to call `persist` here... | [
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230,171 | ethereum/py-evm | eth/vm/base.py | VM.pack_block | def pack_block(self, block: BaseBlock, *args: Any, **kwargs: Any) -> BaseBlock:
"""
Pack block for mining.
:param bytes coinbase: 20-byte public address to receive block reward
:param bytes uncles_hash: 32 bytes
:param bytes state_root: 32 bytes
:param bytes transaction_... | python | def pack_block(self, block: BaseBlock, *args: Any, **kwargs: Any) -> BaseBlock:
"""
Pack block for mining.
:param bytes coinbase: 20-byte public address to receive block reward
:param bytes uncles_hash: 32 bytes
:param bytes state_root: 32 bytes
:param bytes transaction_... | [
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230,172 | ethereum/py-evm | eth/vm/base.py | VM.generate_block_from_parent_header_and_coinbase | def generate_block_from_parent_header_and_coinbase(cls,
parent_header: BlockHeader,
coinbase: Address) -> BaseBlock:
"""
Generate block from parent header and coinbase.
"""
block... | python | def generate_block_from_parent_header_and_coinbase(cls,
parent_header: BlockHeader,
coinbase: Address) -> BaseBlock:
"""
Generate block from parent header and coinbase.
"""
block... | [
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230,173 | ethereum/py-evm | eth/vm/base.py | VM.previous_hashes | def previous_hashes(self) -> Optional[Iterable[Hash32]]:
"""
Convenience API for accessing the previous 255 block hashes.
"""
return self.get_prev_hashes(self.header.parent_hash, self.chaindb) | python | def previous_hashes(self) -> Optional[Iterable[Hash32]]:
"""
Convenience API for accessing the previous 255 block hashes.
"""
return self.get_prev_hashes(self.header.parent_hash, self.chaindb) | [
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230,174 | ethereum/py-evm | eth/vm/base.py | VM.create_transaction | def create_transaction(self, *args: Any, **kwargs: Any) -> BaseTransaction:
"""
Proxy for instantiating a signed transaction for this VM.
"""
return self.get_transaction_class()(*args, **kwargs) | python | def create_transaction(self, *args: Any, **kwargs: Any) -> BaseTransaction:
"""
Proxy for instantiating a signed transaction for this VM.
"""
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230,175 | ethereum/py-evm | eth/vm/base.py | VM.create_unsigned_transaction | def create_unsigned_transaction(cls,
*,
nonce: int,
gas_price: int,
gas: int,
to: Address,
value: int,
... | python | def create_unsigned_transaction(cls,
*,
nonce: int,
gas_price: int,
gas: int,
to: Address,
value: int,
... | [
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230,176 | ethereum/py-evm | eth/vm/base.py | VM.validate_block | def validate_block(self, block: BaseBlock) -> None:
"""
Validate the the given block.
"""
if not isinstance(block, self.get_block_class()):
raise ValidationError(
"This vm ({0!r}) is not equipped to validate a block of type {1!r}".format(
s... | python | def validate_block(self, block: BaseBlock) -> None:
"""
Validate the the given block.
"""
if not isinstance(block, self.get_block_class()):
raise ValidationError(
"This vm ({0!r}) is not equipped to validate a block of type {1!r}".format(
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230,177 | ethereum/py-evm | eth/vm/base.py | VM.validate_uncle | def validate_uncle(cls, block: BaseBlock, uncle: BaseBlock, uncle_parent: BaseBlock) -> None:
"""
Validate the given uncle in the context of the given block.
"""
if uncle.block_number >= block.number:
raise ValidationError(
"Uncle number ({0}) is higher than b... | python | def validate_uncle(cls, block: BaseBlock, uncle: BaseBlock, uncle_parent: BaseBlock) -> None:
"""
Validate the given uncle in the context of the given block.
"""
if uncle.block_number >= block.number:
raise ValidationError(
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230,178 | ethereum/py-evm | eth/tools/_utils/mappings.py | is_cleanly_mergable | def is_cleanly_mergable(*dicts: Dict[Any, Any]) -> bool:
"""Check that nothing will be overwritten when dictionaries are merged using `deep_merge`.
Examples:
>>> is_cleanly_mergable({"a": 1}, {"b": 2}, {"c": 3})
True
>>> is_cleanly_mergable({"a": 1}, {"b": 2}, {"a": 0, c": 3})
... | python | def is_cleanly_mergable(*dicts: Dict[Any, Any]) -> bool:
"""Check that nothing will be overwritten when dictionaries are merged using `deep_merge`.
Examples:
>>> is_cleanly_mergable({"a": 1}, {"b": 2}, {"c": 3})
True
>>> is_cleanly_mergable({"a": 1}, {"b": 2}, {"a": 0, c": 3})
... | [
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230,179 | ethereum/py-evm | eth/db/diff.py | DBDiff.deleted_keys | def deleted_keys(self) -> Iterable[bytes]:
"""
List all the keys that have been deleted.
"""
for key, value in self._changes.items():
if value is DELETED:
yield key | python | def deleted_keys(self) -> Iterable[bytes]:
"""
List all the keys that have been deleted.
"""
for key, value in self._changes.items():
if value is DELETED:
yield key | [
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230,180 | ethereum/py-evm | eth/db/diff.py | DBDiff.apply_to | def apply_to(self,
db: Union[BaseDB, ABC_Mutable_Mapping],
apply_deletes: bool = True) -> None:
"""
Apply the changes in this diff to the given database.
You may choose to opt out of deleting any underlying keys.
:param apply_deletes: whether the pendin... | python | def apply_to(self,
db: Union[BaseDB, ABC_Mutable_Mapping],
apply_deletes: bool = True) -> None:
"""
Apply the changes in this diff to the given database.
You may choose to opt out of deleting any underlying keys.
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230,181 | ethereum/py-evm | eth/db/diff.py | DBDiff.join | def join(cls, diffs: Iterable['DBDiff']) -> 'DBDiff':
"""
Join several DBDiff objects into a single DBDiff object.
In case of a conflict, changes in diffs that come later
in ``diffs`` will overwrite changes from earlier changes.
"""
tracker = DBDiffTracker()
for ... | python | def join(cls, diffs: Iterable['DBDiff']) -> 'DBDiff':
"""
Join several DBDiff objects into a single DBDiff object.
In case of a conflict, changes in diffs that come later
in ``diffs`` will overwrite changes from earlier changes.
"""
tracker = DBDiffTracker()
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230,182 | ethereum/py-evm | eth/tools/_utils/hashing.py | hash_log_entries | def hash_log_entries(log_entries: Iterable[Tuple[bytes, List[int], bytes]]) -> Hash32:
"""
Helper function for computing the RLP hash of the logs from transaction
execution.
"""
logs = [Log(*entry) for entry in log_entries]
encoded_logs = rlp.encode(logs)
logs_hash = keccak(encoded_logs)
... | python | def hash_log_entries(log_entries: Iterable[Tuple[bytes, List[int], bytes]]) -> Hash32:
"""
Helper function for computing the RLP hash of the logs from transaction
execution.
"""
logs = [Log(*entry) for entry in log_entries]
encoded_logs = rlp.encode(logs)
logs_hash = keccak(encoded_logs)
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230,183 | ethereum/py-evm | eth/chains/base.py | BaseChain.get_vm_class_for_block_number | def get_vm_class_for_block_number(cls, block_number: BlockNumber) -> Type['BaseVM']:
"""
Returns the VM class for the given block number.
"""
if cls.vm_configuration is None:
raise AttributeError("Chain classes must define the VMs in vm_configuration")
validate_block... | python | def get_vm_class_for_block_number(cls, block_number: BlockNumber) -> Type['BaseVM']:
"""
Returns the VM class for the given block number.
"""
if cls.vm_configuration is None:
raise AttributeError("Chain classes must define the VMs in vm_configuration")
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230,184 | ethereum/py-evm | eth/chains/base.py | BaseChain.validate_chain | def validate_chain(
cls,
root: BlockHeader,
descendants: Tuple[BlockHeader, ...],
seal_check_random_sample_rate: int = 1) -> None:
"""
Validate that all of the descendents are valid, given that the root header is valid.
By default, check the seal ... | python | def validate_chain(
cls,
root: BlockHeader,
descendants: Tuple[BlockHeader, ...],
seal_check_random_sample_rate: int = 1) -> None:
"""
Validate that all of the descendents are valid, given that the root header is valid.
By default, check the seal ... | [
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230,185 | ethereum/py-evm | eth/chains/base.py | Chain.from_genesis | def from_genesis(cls,
base_db: BaseAtomicDB,
genesis_params: Dict[str, HeaderParams],
genesis_state: AccountState=None) -> 'BaseChain':
"""
Initializes the Chain from a genesis state.
"""
genesis_vm_class = cls.get_vm_class_f... | python | def from_genesis(cls,
base_db: BaseAtomicDB,
genesis_params: Dict[str, HeaderParams],
genesis_state: AccountState=None) -> 'BaseChain':
"""
Initializes the Chain from a genesis state.
"""
genesis_vm_class = cls.get_vm_class_f... | [
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230,186 | ethereum/py-evm | eth/chains/base.py | Chain.get_vm | def get_vm(self, at_header: BlockHeader=None) -> 'BaseVM':
"""
Returns the VM instance for the given block number.
"""
header = self.ensure_header(at_header)
vm_class = self.get_vm_class_for_block_number(header.block_number)
return vm_class(header=header, chaindb=self.cha... | python | def get_vm(self, at_header: BlockHeader=None) -> 'BaseVM':
"""
Returns the VM instance for the given block number.
"""
header = self.ensure_header(at_header)
vm_class = self.get_vm_class_for_block_number(header.block_number)
return vm_class(header=header, chaindb=self.cha... | [
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230,187 | ethereum/py-evm | eth/chains/base.py | Chain.create_header_from_parent | def create_header_from_parent(self,
parent_header: BlockHeader,
**header_params: HeaderParams) -> BlockHeader:
"""
Passthrough helper to the VM class of the block descending from the
given header.
"""
return self... | python | def create_header_from_parent(self,
parent_header: BlockHeader,
**header_params: HeaderParams) -> BlockHeader:
"""
Passthrough helper to the VM class of the block descending from the
given header.
"""
return self... | [
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230,188 | ethereum/py-evm | eth/chains/base.py | Chain.ensure_header | def ensure_header(self, header: BlockHeader=None) -> BlockHeader:
"""
Return ``header`` if it is not ``None``, otherwise return the header
of the canonical head.
"""
if header is None:
head = self.get_canonical_head()
return self.create_header_from_parent(... | python | def ensure_header(self, header: BlockHeader=None) -> BlockHeader:
"""
Return ``header`` if it is not ``None``, otherwise return the header
of the canonical head.
"""
if header is None:
head = self.get_canonical_head()
return self.create_header_from_parent(... | [
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230,189 | ethereum/py-evm | eth/chains/base.py | Chain.get_ancestors | def get_ancestors(self, limit: int, header: BlockHeader) -> Tuple[BaseBlock, ...]:
"""
Return `limit` number of ancestor blocks from the current canonical head.
"""
ancestor_count = min(header.block_number, limit)
# We construct a temporary block object
vm_class = self.g... | python | def get_ancestors(self, limit: int, header: BlockHeader) -> Tuple[BaseBlock, ...]:
"""
Return `limit` number of ancestor blocks from the current canonical head.
"""
ancestor_count = min(header.block_number, limit)
# We construct a temporary block object
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230,190 | ethereum/py-evm | eth/chains/base.py | Chain.get_block_by_hash | def get_block_by_hash(self, block_hash: Hash32) -> BaseBlock:
"""
Returns the requested block as specified by block hash.
"""
validate_word(block_hash, title="Block Hash")
block_header = self.get_block_header_by_hash(block_hash)
return self.get_block_by_header(block_heade... | python | def get_block_by_hash(self, block_hash: Hash32) -> BaseBlock:
"""
Returns the requested block as specified by block hash.
"""
validate_word(block_hash, title="Block Hash")
block_header = self.get_block_header_by_hash(block_hash)
return self.get_block_by_header(block_heade... | [
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230,191 | ethereum/py-evm | eth/chains/base.py | Chain.get_block_by_header | def get_block_by_header(self, block_header: BlockHeader) -> BaseBlock:
"""
Returns the requested block as specified by the block header.
"""
vm = self.get_vm(block_header)
return vm.block | python | def get_block_by_header(self, block_header: BlockHeader) -> BaseBlock:
"""
Returns the requested block as specified by the block header.
"""
vm = self.get_vm(block_header)
return vm.block | [
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] | 58346848f076116381d3274bbcea96b9e2cfcbdf | https://github.com/ethereum/py-evm/blob/58346848f076116381d3274bbcea96b9e2cfcbdf/eth/chains/base.py#L553-L558 |
230,192 | ethereum/py-evm | eth/chains/base.py | Chain.get_canonical_block_by_number | def get_canonical_block_by_number(self, block_number: BlockNumber) -> BaseBlock:
"""
Returns the block with the given number in the canonical chain.
Raises BlockNotFound if there's no block with the given number in the
canonical chain.
"""
validate_uint256(block_number, ... | python | def get_canonical_block_by_number(self, block_number: BlockNumber) -> BaseBlock:
"""
Returns the block with the given number in the canonical chain.
Raises BlockNotFound if there's no block with the given number in the
canonical chain.
"""
validate_uint256(block_number, ... | [
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230,193 | ethereum/py-evm | eth/chains/base.py | Chain.get_canonical_transaction | def get_canonical_transaction(self, transaction_hash: Hash32) -> BaseTransaction:
"""
Returns the requested transaction as specified by the transaction hash
from the canonical chain.
Raises TransactionNotFound if no transaction with the specified hash is
found in the main chain.... | python | def get_canonical_transaction(self, transaction_hash: Hash32) -> BaseTransaction:
"""
Returns the requested transaction as specified by the transaction hash
from the canonical chain.
Raises TransactionNotFound if no transaction with the specified hash is
found in the main chain.... | [
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Raises TransactionNotFound if no transaction with the specified hash is
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] | 58346848f076116381d3274bbcea96b9e2cfcbdf | https://github.com/ethereum/py-evm/blob/58346848f076116381d3274bbcea96b9e2cfcbdf/eth/chains/base.py#L604-L629 |
230,194 | ethereum/py-evm | eth/chains/base.py | Chain.estimate_gas | def estimate_gas(
self,
transaction: BaseOrSpoofTransaction,
at_header: BlockHeader=None) -> int:
"""
Returns an estimation of the amount of gas the given transaction will
use if executed on top of the block specified by the given header.
"""
i... | python | def estimate_gas(
self,
transaction: BaseOrSpoofTransaction,
at_header: BlockHeader=None) -> int:
"""
Returns an estimation of the amount of gas the given transaction will
use if executed on top of the block specified by the given header.
"""
i... | [
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230,195 | ethereum/py-evm | eth/chains/base.py | Chain.import_block | def import_block(self,
block: BaseBlock,
perform_validation: bool=True
) -> Tuple[BaseBlock, Tuple[BaseBlock, ...], Tuple[BaseBlock, ...]]:
"""
Imports a complete block and returns a 3-tuple
- the imported block
- a tuple of... | python | def import_block(self,
block: BaseBlock,
perform_validation: bool=True
) -> Tuple[BaseBlock, Tuple[BaseBlock, ...], Tuple[BaseBlock, ...]]:
"""
Imports a complete block and returns a 3-tuple
- the imported block
- a tuple of... | [
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... | Imports a complete block and returns a 3-tuple
- the imported block
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- a tuple of blocks which were canonical and now are no longer canonical. | [
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] | 58346848f076116381d3274bbcea96b9e2cfcbdf | https://github.com/ethereum/py-evm/blob/58346848f076116381d3274bbcea96b9e2cfcbdf/eth/chains/base.py#L698-L752 |
230,196 | ethereum/py-evm | eth/chains/base.py | Chain.validate_block | def validate_block(self, block: BaseBlock) -> None:
"""
Performs validation on a block that is either being mined or imported.
Since block validation (specifically the uncle validation) must have
access to the ancestor blocks, this validation must occur at the Chain
level.
... | python | def validate_block(self, block: BaseBlock) -> None:
"""
Performs validation on a block that is either being mined or imported.
Since block validation (specifically the uncle validation) must have
access to the ancestor blocks, this validation must occur at the Chain
level.
... | [
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Since block validation (specifically the uncle validation) must have
access to the ancestor blocks, this validation must occur at the Chain
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Cannot be used to validate genesis block. | [
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] | 58346848f076116381d3274bbcea96b9e2cfcbdf | https://github.com/ethereum/py-evm/blob/58346848f076116381d3274bbcea96b9e2cfcbdf/eth/chains/base.py#L761-L777 |
230,197 | ethereum/py-evm | eth/chains/base.py | Chain.validate_gaslimit | def validate_gaslimit(self, header: BlockHeader) -> None:
"""
Validate the gas limit on the given header.
"""
parent_header = self.get_block_header_by_hash(header.parent_hash)
low_bound, high_bound = compute_gas_limit_bounds(parent_header)
if header.gas_limit < low_bound:... | python | def validate_gaslimit(self, header: BlockHeader) -> None:
"""
Validate the gas limit on the given header.
"""
parent_header = self.get_block_header_by_hash(header.parent_hash)
low_bound, high_bound = compute_gas_limit_bounds(parent_header)
if header.gas_limit < low_bound:... | [
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] | 58346848f076116381d3274bbcea96b9e2cfcbdf | https://github.com/ethereum/py-evm/blob/58346848f076116381d3274bbcea96b9e2cfcbdf/eth/chains/base.py#L786-L799 |
230,198 | ethereum/py-evm | eth/chains/base.py | Chain.validate_uncles | def validate_uncles(self, block: BaseBlock) -> None:
"""
Validate the uncles for the given block.
"""
has_uncles = len(block.uncles) > 0
should_have_uncles = block.header.uncles_hash != EMPTY_UNCLE_HASH
if not has_uncles and not should_have_uncles:
# optimiza... | python | def validate_uncles(self, block: BaseBlock) -> None:
"""
Validate the uncles for the given block.
"""
has_uncles = len(block.uncles) > 0
should_have_uncles = block.header.uncles_hash != EMPTY_UNCLE_HASH
if not has_uncles and not should_have_uncles:
# optimiza... | [
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] | 58346848f076116381d3274bbcea96b9e2cfcbdf | https://github.com/ethereum/py-evm/blob/58346848f076116381d3274bbcea96b9e2cfcbdf/eth/chains/base.py#L801-L870 |
230,199 | ethereum/py-evm | eth/chains/base.py | MiningChain.apply_transaction | def apply_transaction(self,
transaction: BaseTransaction
) -> Tuple[BaseBlock, Receipt, BaseComputation]:
"""
Applies the transaction to the current tip block.
WARNING: Receipt and Transaction trie generation is computationally
heavy a... | python | def apply_transaction(self,
transaction: BaseTransaction
) -> Tuple[BaseBlock, Receipt, BaseComputation]:
"""
Applies the transaction to the current tip block.
WARNING: Receipt and Transaction trie generation is computationally
heavy a... | [
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WARNING: Receipt and Transaction trie generation is computationally
heavy and incurs significant performance overhead. | [
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] | 58346848f076116381d3274bbcea96b9e2cfcbdf | https://github.com/ethereum/py-evm/blob/58346848f076116381d3274bbcea96b9e2cfcbdf/eth/chains/base.py#L887-L913 |
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