Solidity

Solidity logo

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.

Note

The best way to try out Solidity right now is using Remix (it can take a while to load, please be patient). Remix is a web browser based IDE that allows you to write Solidity smart contracts, then deploy and run the smart contracts.

Warning

Since software is written by humans, it can have bugs. Thus, also smart contracts should be created following well-known best-practices in software development. This includes code review, testing, audits and correctness proofs. Also note that users are sometimes more confident in code than its authors. Finally, blockchains have their own things to watch out for, so please take a look at the section Security Considerations.

Translations

This documentation is translated into several languages by community volunteers with varying degrees of completeness and up-to-dateness. The English version stands as a reference.

Language Documentation

On the next pages, we will first see a simple smart contract written in Solidity followed by the basics about blockchains and the Ethereum Virtual Machine.

The next section will explain several features of Solidity by giving useful example contracts. Remember that you can always try out the contracts in your browser!

The fourth and most extensive section will cover all aspects of Solidity in depth.

If you still have questions, you can try searching or asking on the Ethereum Stackexchange site, or come to our gitter channel. Ideas for improving Solidity or this documentation are always welcome!

Contents

Keyword Index, Search Page