ape.utils

ABI

class ape.utils.abi.Struct

Bases: object

A class for contract return values using the struct data-structure.

items() → dict

Override

class ape.utils.abi.StructParser(method_abi: ConstructorABI | MethodABI | EventABI)

Bases: object

A utility class responsible for parsing structs out of values.

decode_output(values: list | tuple) → Any

Parse a list of output types and values into structs. Values are only altered when they are a struct. This method also handles structs within structs as well as arrays of structs.

Parameters:

values (Union[list, tuple]) – A list of of output values.

Returns:

The same input values only decoded into structs when applicable.

Return type:

Any

property default_name: str

The default struct return name for unnamed structs. This value is also used for named tuples where the tuple does not have a name (but each item in the tuple does have a name).

encode_input(values: list | tuple | dict) → Any

Convert dicts and other objects to struct inputs.

Parameters:

values (Union[list, tuple]) – A list of of input values.

Returns:

The same input values only decoded into structs when applicable.

Return type:

Any

ape.utils.abi.create_struct(name: str, types: Sequence[ABIType], output_values: Sequence) → Any

Create a dataclass representing an ABI struct that can be used as inputs or outputs. The struct properties can be accessed via . notation, as keys in a dictionary, or numeric tuple access.

NOTE: This method assumes you already know the values to give to the struct properties.

Parameters:

  • name (str) – The name of the struct.

  • (list[ABIType] (types) – The types of values in the struct.

  • output_values (list[Any]) – The struct property values.

Returns:

The struct dataclass.

Return type:

Any

ape.utils.abi.is_array(abi_type: str | ABIType) → bool

Returns True if the given type is a probably an array.

Parameters:

abi_type (Union[str, ABIType]) – The type to check.

Returns:

bool

ape.utils.abi.is_named_tuple(outputs: Sequence[ABIType], output_values: Sequence) → bool

Returns True if the given output is a tuple where every item is named.

ape.utils.abi.is_struct(outputs: ABIType | Sequence[ABIType]) → bool

Returns True if the given output is a struct.

ape.utils.abi.returns_array(abi: MethodABI) → bool

Returns True if the given method ABI likely returns an array.

Parameters:

abi (MethodABI) – An ABI method.

Returns:

bool

Basemodel

TODO: In 0.9, move this module to ape.types.

class ape.utils.basemodel.BaseInterface

Bases: ManagerAccessMixin, ABC

Abstract class that has manager access.

class ape.utils.basemodel.BaseInterfaceModel

Bases: BaseInterface, BaseModel

An abstract base-class with manager access on a pydantic base model.

class ape.utils.basemodel.BaseModel

Bases: BaseModel

An ape-pydantic BaseModel.

model_copy(*, update: dict[str, Any] | None = None, deep: bool = False, cache_clear: Sequence[str] | None = None) → Model

Usage docs: https://docs.pydantic.dev/2.9/concepts/serialization/#model_copy

Returns a copy of the model.

Parameters:

  • update – Values to change/add in the new model. Note: the data is not validated before creating the new model. You should trust this data.

  • deep – Set to True to make a deep copy of the model.

Returns:

New model instance.

class ape.utils.basemodel.ExtraAttributesMixin

Bases: object

A mixin to use on models that provide ExtraModelAttributes. NOTE: Must come _before_ your base-model class in subclass tuple to function.

class ape.utils.basemodel.ExtraModelAttributes(*, name: str, attributes: Any | Callable[[], Any] | Callable[[str], Any], include_getattr: bool = True, include_getitem: bool = False, additional_error_message: str | None = None)

Bases: BaseModel

A class for defining extra model attributes.

additional_error_message: str | None

An additional error message to include at the end of the normal IndexError message.

attributes: Any | Callable[[], Any] | Callable[[str], Any]

The attributes. The following types are supported:

  1. A model or dictionary to lookup attributes.

  2. A callable with no arguments, for lazily evaluating a model or dictionary for lookup.

  3. A callable with a single argument that is the attribute name. This style of lookup cannot be used for optionals.

get(name: str) → Any | None

Get an attribute.

Parameters:

name (str) – The name of the attribute.

Returns:

The attribute if it exists, else None.

Return type:

Optional[Any]

include_getattr: bool

Whether to use these in __getattr__.

include_getitem: bool

Whether to use these in __getitem__.

name: str

The name of the attributes. This is important in instances such as when an attribute is missing, we can show a more accurate exception message.

class ape.utils.basemodel.ManagerAccessMixin

Bases: object

A mixin for accessing Ape’s manager at the class level.

Usage example:

from ape.utils import ManagerAccessMixin

class MyClass(ManagerAccessMixin):
def my_function(self):

accounts = self.account_manager # And so on!

Project

alias of ProjectManager

class ape.utils.basemodel.injected_before_use(fget=None, fset=None, fdel=None, doc=None)

Bases: property

Injected properties are injected class variables that must be set before use.

NOTE: do not appear in a Pydantic model’s set of properties.

class ape.utils.basemodel.manager_access(fn)

Bases: property

Miscellaneous

ape.utils.misc.extract_nested_value(root: Mapping, *args: str) → dict | None

Dig through a nested dict using the given keys and return the last-found object.

Usage example:

>>> extract_nested_value({"foo": {"bar": {"test": "VALUE"}}}, "foo", "bar", "test")
'VALUE'
Parameters:

root (dict) – Nested keys to form arguments.

Returns:

The final value if it exists else None if the tree ends at any point.

Return type:

dict, optional

ape.utils.misc.gas_estimation_error_message(tx_error: Exception) → str

Get an error message containing the given error and an explanation of how the gas estimation failed, as in ape.api.providers.ProviderAPI implementations.

Parameters:

tx_error (Exception) – The error that occurred when trying to estimate gas.

Returns:

An error message explaining that the gas failed and that the transaction will likely revert.

Return type:

str

ape.utils.misc.get_current_timestamp_ms() → int

Get the current UNIX timestamp in milliseconds.

Returns:

int

ape.utils.misc.get_package_version(obj: Any) → str

Get the version of a single package.

Parameters:

obj – object to search inside for __version__.

Returns:

version string.

Return type:

str

ape.utils.misc.is_evm_precompile(address: str) → bool

Returns True if the given address string is a known Ethereum pre-compile address.

Parameters:

address (str)

Returns:

bool

ape.utils.misc.is_zero_hex(address: str) → bool

Returns True if the hex str is only zero. NOTE: Empty hexes like "0x" are considered zero.

Parameters:

address (str) – The address to check.

Returns:

bool

ape.utils.misc.load_config(path: Path, expand_envars=True, must_exist=False) → dict

Load a configuration file into memory. A file at the given path must exist or else it will throw OSError. The configuration file must be a .json or .yaml or else it will throw TypeError.

Parameters:

  • path (str) – path to filesystem to find.

  • expand_envars (bool) – True the variables in path are able to expand to show full path.

  • must_exist (bool) – True will be set if the configuration file exist and is able to be load.

Returns:

Configured settings parsed from a config file.

Return type:

dict

ape.utils.misc.log_instead_of_fail(default: Any | None = None)

A decorator for logging errors instead of raising. This is useful for methods like __repr__ which shouldn’t fail.

ape.utils.misc.pragma_str_to_specifier_set(pragma_str: str) → SpecifierSet | None

Convert the given pragma str to a packaging.version.SpecifierSet if possible.

Parameters:

pragma_str (str) – The str to convert.

Returns:

Optional[packaging.version.SpecifierSet]

ape.utils.misc.raises_not_implemented(fn)

Decorator for raising helpful not implemented error.

ape.utils.misc.run_until_complete(*item: Any) → Any

Completes the given coroutine and returns its value.

Parameters:

*item (Any) – A coroutine or any return value from an async method. If not given a coroutine, returns the given item. Provide multiple coroutines to run tasks in parallel.

Returns:

The value that results in awaiting the coroutine. Else, item if item is not a coroutine. If given multiple coroutines, returns the result from asyncio.gather.

Return type:

(Any)

class ape.utils.misc.singledispatchmethod(func)

Bases: object

Single-dispatch generic method descriptor.

Supports wrapping existing descriptors and handles non-descriptor callables as instance methods.

register(cls, func) → func

Registers a new implementation for the given cls on a generic_method.

ape.utils.misc.to_int(value: Any) → int

Convert the given value, such as hex-strs or hex-bytes, to an integer.

OS

ape.utils.os.clean_path(path: Path) → str

Replace the home directory with key $HOME and return the path as a str. This is used for outputting paths with less doxxing.

Parameters:

path (Path) – The path to sanitize.

Returns:

A sanitized path-str.

Return type:

str

ape.utils.os.create_tempdir(name: str | None = None) → Iterator[Path]

Create a temporary directory. Differs from TemporaryDirectory() context-call alone because it automatically resolves the path.

Parameters:

name (Optional[str]) – Optional provide a name of the directory. Else, defaults to root of tempfile.TemporaryDirectory() (resolved).

Returns:

Context managing the temporary directory.

Return type:

Iterator[Path]

ape.utils.os.expand_environment_variables(contents: str) → str

Replace substrings of the form $name or ${name} in the given path with the value of environment variable name.

Parameters:

contents (str) – A path-like object representing a file system. A path-like object is either a string or bytes object representing a path.

Returns:

The given content with all environment variables replaced with their values.

Return type:

str

ape.utils.os.extract_archive(archive_file: Path, destination: Path | None = None)

Extract an archive file. Supports .zip or .tar.gz.

Parameters:

  • archive_file (Path) – The file-path to the archive.

  • destination (Optional[Path]) – Optionally provide a destination. Defaults to the parent directory of the archive file.

ape.utils.os.get_all_files_in_directory(path: Path, pattern: Pattern | str | None = None, max_files: int | None = None) → list[Path]

Returns all the files in a directory structure (recursive).

For example, given a directory structure like:

dir_a: dir_b, file_a, file_b
dir_b: file_c

and you provide the path to dir_a, it will return a list containing the paths to file_a, file_b and file_c.

Parameters:

  • path (pathlib.Path) – A directory containing files of interest.

  • pattern (Optional[Union[Pattern, str]]) – Optionally provide a regex pattern to match.

  • max_files (Optional[int]) – Optionally set a max file count. This is useful because huge file structures will be very slow.

Returns:

A list of files in the given directory.

Return type:

list[pathlib.Path]

ape.utils.os.get_full_extension(path: Path | str) → str

For a path like Path("Contract.t.sol"), returns .t.sol, unlike the regular Path property .suffix which returns .sol.

Parameters:

path (Path | str) – The path with an extension.

Returns:

The full suffix

Return type:

str

ape.utils.os.get_package_path(package_name: str) → Path

Get the path to a package from site-packages.

Parameters:

package_name (str) – The name of the package.

Returns:

Path

ape.utils.os.get_relative_path(target: Path, anchor: Path) → Path

Compute the relative path of target relative to anchor, which may or may not share a common ancestor.

NOTE ON PERFORMANCE: Both paths must be absolute to use this method. If you know both methods are absolute, this method is a performance boost. If you have to first call .absolute() on the paths, use target.relative_to(anchor) instead; as it will be faster in that case.

Parameters:

  • target (pathlib.Path) – The path we are interested in.

  • anchor (pathlib.Path) – The path we are starting from.

Returns:

The new path to the target path from the anchor path.

Return type:

pathlib.Path

ape.utils.os.in_tempdir(path: Path) → bool

Returns True when the given path is in a temporary directory.

Parameters:

path (Path) – The path to check.

Returns:

bool

ape.utils.os.is_relative_to(path: Path, target: Path) → bool

Search a path and determine its relevancy.

Parameters:

  • path (str) – Path represents a filesystem to find.

  • target (str) – Path represents a filesystem to match.

Returns:

True if the path is relative to the target path or False.

Return type:

bool

ape.utils.os.path_match(path: str | Path, *exclusions: str) → bool

A better glob-matching function. For example:

>>> from pathlib import Path
>>> p = Path("test/to/.build/me/2/file.json")
>>> p.match("**/.build/**")
False
>>> from ape.utils.os import path_match
>>> path_match(p, "**/.build/**")
True
ape.utils.os.run_in_tempdir(fn: Callable[[Path], Any], name: str | None = None)

Run the given function in a temporary directory with its path resolved.

Parameters:

  • fn (Callable) – A function that takes a path. It gets called with the resolved path to the temporary directory.

  • name (Optional[str]) – Optionally name the temporary directory.

Returns:

The result of the function call.

Return type:

Any

class ape.utils.os.use_temp_sys_path(path: Path, exclude: list[Path] | None = None)

Bases: object

A context manager to manage injecting and removing paths from a user’s sys paths without permanently modifying it.

Process

class ape.utils.process.JoinableQueue(maxsize=0)

Bases: Queue

A queue that can be joined, useful for multi-processing. Borrowed from the py-geth library.

join(timeout=None)

Blocks until all items in the Queue have been gotten and processed.

The count of unfinished tasks goes up whenever an item is added to the queue. The count goes down whenever a consumer thread calls task_done() to indicate the item was retrieved and all work on it is complete.

When the count of unfinished tasks drops to zero, join() unblocks.

ape.utils.process.spawn(target, *args, **kwargs)

Spawn a new daemon thread. Borrowed from the py-geth library.

RPC

class ape.utils.rpc.RPCHeaders(data=None, **kwargs)

Bases: CaseInsensitiveDict

A dict-like data-structure for HTTP-headers. It is case-insensitive and appends user-agent strings rather than overrides.

ape.utils.rpc.allow_disconnected(fn: Callable)

A decorator that instead of raising ProviderNotConnectedError warns and returns None.

Usage example:

from typing import Optional
from ape.types import SnapshotID
from ape.utils import return_none_when_disconnected

@allow_disconnected
def try_snapshot(self) -> Optional[SnapshotID]:
    return self.chain.snapshot()
ape.utils.rpc.stream_response(download_url: str, progress_bar_description: str = 'Downloading') → bytes

Download HTTP content by streaming and returning the bytes. Progress bar will be displayed in the CLI.

Parameters:

  • download_url (str) – String to get files to download.

  • progress_bar_description (str) – Downloading word.

Returns:

Content in bytes to show the progress.

Return type:

bytes

Testing

class ape.utils.testing.GeneratedDevAccount(address, private_key)

Bases: tuple

An account key-pair generated from the test mnemonic. Set the test mnemonic in your ape-config.yaml file under the test section. Access your test accounts using the test_accounts property.

Config example:

test:
  mnemonic: test test test test test test test test test test test junk
  number_of_accounts: 10
address

Alias for field number 0

private_key

Alias for field number 1

ape.utils.testing.generate_dev_accounts(mnemonic: str = 'test test test test test test test test test test test junk', number_of_accounts: int = 10, hd_path: str = "m/44'/60'/0'/0", start_index: int = 0) → list[GeneratedDevAccount]

Create accounts from the given test mnemonic. Use these accounts (or the mnemonic) in chain-genesis for testing providers.

Parameters:

  • mnemonic (str) – mnemonic phrase or seed words.

  • number_of_accounts (int) – Number of accounts. Defaults to 10.

  • hd_path (str) – Hard Wallets/HD Keys derivation path format. Defaults to "m/44'/60'/0'/0".

  • start_index (int) – The index to start from in the path. Defaults to 0.

Returns:

List of development accounts.

Return type:

list[GeneratedDevAccount]

Trace

class ape.utils.trace.TraceStyles

Bases: object

Colors to use when displaying a call trace. Each item in the class points to the part of the trace it colors.

CONTRACTS = '#ff8c00'

Contract type names.

DELEGATE = '#d75f00'

The part ‘(delegate)’ that appears before delegate calls.

GAS_COST = 'dim'

The gas used of the call.

INPUTS = 'bright_magenta'

Method arguments.

METHODS = 'bright_green'

Method names; not including arguments or return values.

OUTPUTS = 'bright_blue'

Method return values.

VALUE = '#00afd7'

The transaction value, when it’s > 0.