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Solidity
========
.. image:: logo.svg
:width: 120px
:alt: Solidity logo
:align: center
Solidity is an object-oriented, high-level language for implementing smart
contracts. Smart contracts are programs which govern the behaviour of accounts
within the Ethereum state.
Solidity was influenced by C++, Python and JavaScript and is designed to target
the Ethereum Virtual Machine (EVM).
Solidity is statically typed, supports inheritance, libraries and complex
user-defined types among other features.
With Solidity you can create contracts for uses such as voting, crowdfunding, blind auctions,
and multi-signature wallets.
When deploying contracts, you should use the latest released version of Solidity. This is because breaking changes as well as new features and bug fixes are introduced regularly. We currently use a 0.x version number [to indicate this fast pace of change](https://semver.org/#spec-item-4).
Language Documentation
----------------------
If you are new to the concept of smart contracts we recommend you start with
:ref:`an example smart contract <simple-smart-contract>` written
in Solidity. When you are ready for more detail, we recommend you read the
:doc:`"Solidity by Example" <solidity-by-example>` and :doc:`"Solidity in Depth" <solidity-in-depth>` sections to learn the core concepts of the language.
For further reading, try :ref:`the basics of blockchains <blockchain-basics>`
and details of the :ref:`Ethereum Virtual Machine <the-ethereum-virtual-machine>`.
.. hint::
You can always try out code examples in your browser with the
`Remix IDE <https://remix.ethereum.org>`_. Remix is a web browser based IDE
that allows you to write Solidity smart contracts, then deploy and run the
smart contracts. It can take a while to load, so please be patient.
.. warning::
As humans write software, it can have bugs. You should follow established
software development best-practices when writing your smart contracts, this
includes code review, testing, audits, and correctness proofs. Smart contract
users are sometimes more confident with code than their authors, and
blockchains and smart contracts have their own unique issues to
watch out for, so before working on production code, make sure you read the
:ref:`security_considerations` section.
If you have any questions, you can try searching for answers or asking on the
`Ethereum Stackexchange <https://ethereum.stackexchange.com/>`_, or our `gitter channel <https://gitter.im/ethereum/solidity/>`_.
Ideas for improving Solidity or this documentation are always welcome, read our :doc:`contributors guide <contributing>` for more details.
Translations
------------
Community volunteers help translate this documentation into several languages.
They have varying degrees of completeness and up-to-dateness. The English
version stands as a reference.
* `Simplified Chinese <http://solidity-cn.readthedocs.io>`_ (in progress)
* `Spanish <https://solidity-es.readthedocs.io>`_
* `Russian <https://github.com/ethereum/wiki/wiki/%5BRussian%5D-%D0%A0%D1%83%D0%BA%D0%BE%D0%B2%D0%BE%D0%B4%D1%81%D1%82%D0%B2%D0%BE-%D0%BF%D0%BE-Solidity>`_ (rather outdated)
* `Korean <http://solidity-kr.readthedocs.io>`_ (in progress)
* `French <http://solidity-fr.readthedocs.io>`_ (in progress)
Contents
========
:ref:`Keyword Index <genindex>`, :ref:`Search Page <search>`
.. toctree::
:maxdepth: 2
introduction-to-smart-contracts.rst
installing-solidity.rst
solidity-by-example.rst
solidity-in-depth.rst
security-considerations.rst
resources.rst
using-the-compiler.rst
metadata.rst
abi-spec.rst
yul.rst
style-guide.rst
common-patterns.rst
bugs.rst
contributing.rst
frequently-asked-questions.rst
lll.rst
|
