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eth-pm-0.1.0a23
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مشاهده بیشترتوضیحات
Python abstraction for ERC190 packages.
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | eth-pm-0.1.0a23 |
| نام | eth-pm |
| نسخه کتابخانه | 0.1.0a23 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Piper Merriam |
| ایمیل نویسنده | pipermerriam@gmail.com |
| آدرس صفحه اصلی | https://github.com/ethpm/py-ethpm |
| آدرس اینترنتی | https://pypi.org/project/eth-pm/ |
| مجوز | MIT |
ETHPM
=====
- parse and validate packages
- given a web3 instance provide access to contract factory classes
- given a web3 instance provide access to all of the deployed contract
instances for the chain that web3 is connected to.
- validate package bytecode matches compilation output.
- validate deployed bytecode matches compilation output
- access to packages dependencies
- construct new packages
Web3
----
The ``Package`` object will function much like the ``Contract`` class
provided by ``web3``. Rather than instantiating the base class provided
by ``ethpm``, you will instead use a ``classmethod`` which generates a
new ``Package`` class for a given package.
.. code:: python
OwnedPackage = BasePackage.factory('/path/to/owned-v1.0.0.json')
Then, the ``OwnedPackage`` can be instantiated with any ``web3``
intance.
.. code:: python
owned_package = OwnedPackage(web3)
A ``Package`` class can only be directly constructed from the parsed
package JSON. It can also be initialized with the package’s URI or the
local filesystem path to a package by using ``Package.from_file(path)``.
Contract Factories
------------------
Contract factories should be accessible from the package class but you
must also provide a web3 instance.
.. code:: python
Owned = OwnedPackage.get_contract_factory(web3, 'owned')
From a package instance, they are also available as properties.
.. code:: python
Owned = owned_package.contract_factories.owned
In cases where a contract uses a library, the contract factory will have
unlinked bytecode. The ``ethpm`` package ships with its own subclass of
``web3.contract.Contract`` with a few extra methods and properties
related to bytecode linking
.. code:: python
>>> math = owned_package.contract_factories.math
>>> math.has_linkable_bytecode
True
>>> math.is_bytecode_linked
False
>>> linked_math = math.link_bytecode({'MathLib': '0x1234...'})
>>> linked_math.is_bytecode_linked
True
..
Note: the actual format of the link data is not clear since library
names aren’t a one-size-fits all solution. We need the ability to
specify specific link references in the code.
Deployed Contracts
------------------
Deployed contracts are only available from package instances. The
package instance will filter the ``deployments`` based on the chain that
``web3`` is connected to.
Accessing deployments is done with property access
.. code:: python
package.deployed_contracts.Greeter
IPFS
----
We’ll need a pluggable backend system for IPFS access. A built-in
default one that defaults to using infura should be enough to get off
the ground.
Lower priority but important will be ensuring that a user can configure
connecting to their own IPFS node.
Verifying Things
----------------
The ``Package`` class should verify all of the following things.
- Package json matches EthPM V2 Manifest Specification
- Included bytecode matches compilation output
- Deployed bytecode matches compilation output
Dependencies
------------
The ``Package`` class should provide access to the full dependency tree.
.. code:: python
>>> owned_package.build_dependencies['zeppelin']
<ZeppelinPackage>
Testing Strategy
----------------
- Load and validate packages from disk.
- Access package data.
- Access contract factories.
EthPM-Spec
----------
- `EthPM-Spec <https://github.com/ethpm/ethpm-spec>`__ is referenced
inside this repo as a submodule.*\*
- If you clone this repository, you should run this command to fetch
the contents of the submodule
.. code:: sh
git submodule init
Registry URI
------------
The URI to lookup a package from a registry should follow the following
format. (subject to change as the Registry Contract Standard makes it’s
way through the EIP process)
::
scheme://authority/package-name?version=x.x.x
- URI must be a string type
- ``scheme``: ``ercxxx``
- ``authority``: Must be a valid ENS domain or a valid checksum address
pointing towards a registry contract.
- ``package-name``: Must conform to the package-name as specified in
the
`EthPM-Spec <http://ethpm-spec.readthedocs.io/en/latest/package-spec.html#package-name>`__.
- ``version``: The URI escaped version string, *should* conform to the
`semver <http://semver.org/>`__ version numbering specification.
i.e. ``ercxxx://packages.zeppelinos.eth/owned?version=1.0.0``
Release setup
-------------
For Debian-like systems:
.. code:: sh
apt install pandoc
To release a new version:
.. code:: sh
make release bump=$$VERSION_PART_TO_BUMP$$
How to bumpversion
------------------
The version format for this repo is ``{major}.{minor}.{patch}`` for
stable, and ``{major}.{minor}.{patch}-{stage}.{devnum}`` for unstable
(``stage`` can be alpha or beta).
To issue the next version in line, specify which part to bump, like
``make release bump=minor`` or ``make release bump=devnum``.
If you are in a beta version, ``make release bump=stage`` will switch to
a stable.
To issue an unstable version when the current version is stable, specify
the new version explicitly, like
``make release bump="--new-version 4.0.0-alpha.1 devnum"``
نحوه نصب
نصب پکیج whl eth-pm-0.1.0a23:
pip install eth-pm-0.1.0a23.whl
نصب پکیج tar.gz eth-pm-0.1.0a23:
pip install eth-pm-0.1.0a23.tar.gz