Skip to main content

Python wrapper around the solc binary with 0.5.x and 0.6.x support

Project description

Pypi Status Build Status Coverage Status

Python wrapper around the solc Solidity compiler with 0.5.x and 0.6.x support.

Forked from `py-solc <https://github.com/ethereum/py-solc>`__.

Dependencies

Py-solc-x allows the use of multiple versions of solc and installs them as needed. You must have all required solc dependencies installed for it to work properly.

Supported Versions

Py-solc-x can install the following solc versions:

  • Linux and Windows: >=0.4.11

  • OSX: >=0.5.0

See Installing Solidity on OSX for information on how to use 0.4.x versions with OSX.

Quickstart

Installation

pip install py-solc-x

Installing the solc Executable

The first time py-solc-x is imported it will automatically check for an installed version of solc on your system. If none is found, you must manually install via solcx.install_solc:

>>> from solcx import install_solc
>>> install_solc('v0.4.25')

Or via the command line:

python -m solcx.install v0.4.25

By default, solc versions are installed at ~/.solcx/. If you wish to use a different directory you can specify it with the SOLCX_BINARY_PATH environment variable.

Setting the solc Version

Py-solc-x defaults to the most recent installed version set as the active one. To check or modify the active version:

>>> from solcx import get_solc_version, set_solc_version
>>> get_solc_version()
Version('0.5.7+commit.6da8b019.Linux.gpp')
>>> set_solc_version('v0.4.25')
>>>

You can also set the version based on the pragma version string. The highest compatible version will be used:

>>> from solcx import set_solc_version_pragma
>>> set_solc_version_pragma('^0.4.20 || >0.5.5 <0.7.0')
Using solc version 0.5.8
>>> set_solc_version_pragma('^0.4.20 || >0.5.5 <0.7.0', check_new=True)
Using solc version 0.5.8
Newer compatible solc version exists: 0.6.0

To view available and installed versions:

>>> from solcx import get_installed_solc_versions, get_available_solc_versions
>>> get_installed_solc_versions()
['v0.4.25', 'v0.5.3', 'v0.6.0']
>>> get_available_solc_versions()
['v0.6.0', 'v0.5.15', 'v0.5.14', 'v0.5.13', 'v0.5.12', 'v0.5.11', 'v0.5.10', 'v0.5.9', 'v0.5.8', 'v0.5.7', 'v0.5.6', 'v0.5.5', 'v0.5.4', 'v0.5.3', 'v0.5.2', 'v0.5.1', 'v0.5.0', 'v0.4.25', 'v0.4.24', 'v0.4.23', 'v0.4.22', 'v0.4.21', 'v0.4.20', 'v0.4.19', 'v0.4.18', 'v0.4.17', 'v0.4.16', 'v0.4.15', 'v0.4.14', 'v0.4.13', 'v0.4.12', 'v0.4.11']

To install the highest compatible version based on the pragma version string:

>>> from solcx import install_solc_pragma
>>> install_solc_pragma('^0.4.20 || >0.5.5 <0.7.0')

Standard JSON Compilation

Use the solcx.compile_standard function to make use of the standard-json compilation feature.

>>> from solcx import compile_standard
>>> compile_standard({
...     'language': 'Solidity',
...     'sources': {'Foo.sol': 'content': "...."},
... })
{
    'contracts': {...},
    'sources': {...},
    'errors': {...},
}
>>> compile_standard({
...     'language': 'Solidity',
...     'sources': {'Foo.sol': {'urls': ["/path/to/my/sources/Foo.sol"]}},
... }, allow_paths="/path/to/my/sources")
{
    'contracts': {...},
    'sources': {...},
    'errors': {...},
}

Legacy Combined JSON compilation

>>> from solcx import compile_source, compile_files
>>> compile_source("contract Foo { function Foo() {} }")
{
    'Foo': {
        'abi': [{'inputs': [], 'type': 'constructor'}],
        'code': '0x60606040525b5b600a8060126000396000f360606040526008565b00',
        'code_runtime': '0x60606040526008565b00',
        'source': None,
        'meta': {
            'compilerVersion': '0.3.5-9da08ac3',
            'language': 'Solidity',
            'languageVersion': '0',
        },
    },
}
>>> compile_files(["/path/to/Foo.sol", "/path/to/Bar.sol"])
{
    'Foo': {
        'abi': [{'inputs': [], 'type': 'constructor'}],
        'code': '0x60606040525b5b600a8060126000396000f360606040526008565b00',
        'code_runtime': '0x60606040526008565b00',
        'source': None,
        'meta': {
            'compilerVersion': '0.3.5-9da08ac3',
            'language': 'Solidity',
            'languageVersion': '0',
        },
    },
    'Bar': {
        'abi': [{'inputs': [], 'type': 'constructor'}],
        'code': '0x60606040525b5b600a8060126000396000f360606040526008565b00',
        'code_runtime': '0x60606040526008565b00',
        'source': None,
        'meta': {
            'compilerVersion': '0.3.5-9da08ac3',
            'language': 'Solidity',
            'languageVersion': '0',
        },
    },
}

Unlinked Libraries

>>> from solcx import link_code
>>> unlinked_bytecode = "606060405260768060106000396000f3606060405260e060020a6000350463e7f09e058114601a575b005b60187f0c55699c00000000000000000000000000000000000000000000000000000000606090815273__TestA_________________________________90630c55699c906064906000906004818660325a03f41560025750505056"
>>> link_code(unlinked_bytecode, {'TestA': '0xd3cda913deb6f67967b99d67acdfa1712c293601'})
... "606060405260768060106000396000f3606060405260e060020a6000350463e7f09e058114601a575b005b60187f0c55699c00000000000000000000000000000000000000000000000000000000606090815273d3cda913deb6f67967b99d67acdfa1712c29360190630c55699c906064906000906004818660325a03f41560025750505056"

Import Path Remappings

solc provides path aliasing allow you to have more reusable project configurations.

You can use this like:

>>> from solcx import compile_files

>>> compile_files([source_file_path], import_remappings=["zeppeling=/my-zeppelin-checkout-folder"])

More information about solc import aliasing

Development

This project was forked from `py-solc <https://github.com/ethereum/py-solc>`__ and should be considered a beta. Comments, questions, criticisms and pull requests are welcomed.

Tests

Py-solc-x is tested on Linux and Windows with solc versions >=0.4.11.

To run the test suite:

pytest tests/

By default, the test suite installs all available solc versions for your OS. If you only wish to test against already installed versions, include the --no-install flag.

License

This project is licensed under the MIT license.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

py-solc-x-0.10.0.tar.gz (14.1 kB view hashes)

Uploaded Source

Built Distribution

py_solc_x-0.10.0-py3-none-any.whl (15.1 kB view hashes)

Uploaded Python 3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page