py-solc-x 0.3.0

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.

Versions >=0.4.11 may be installed, however only versions >=0.4.2 are supported and tested.

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, it will install the most recently released version that is compatible with your operating system.

If you wish to install a different version you may do so from within python:

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

Or via the command line:

$ python -m solcx.install v0.4.25

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')

To set the version based on the pragma version string - this will use the highest compatible version installed, if you have a compatible version installed, or it will install the highest compatible version:

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

To view available and installed versions:

>>> from solcx import get_installed_solc_versions, set_solc_version
>>> get_installed_solc_versions()
['v0.4.25', 'v0.5.3']
>>> get_available_solc_versions()
['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 check or modify the active version:

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

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, link_code
>>> 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_code = "606060405260768060106000396000f3606060405260e060020a6000350463e7f09e058114601a575b005b60187f0c55699c00000000000000000000000000000000000000000000000000000000606090815273__TestA_________________________________90630c55699c906064906000906004818660325a03f41560025750505056"
>>> link_code(unlinked_code, {'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_source, compile_files, link_code

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

More information about solc import aliasing

Development

This project was recently forked from py-solc and should be considered a beta. Comments, questions, criticisms and pull requests are welcomed.

py.test tests

License

This project is licensed under the MIT license.