Layout of a Solidity Source File — Solidity 0.6.7 documentation
Layout of a Solidity Source File¶ Source files can contain an arbitrary number of contract definitions, import directives, pragma directives and struct and enum definitions. Pragmas¶ The pragma keyword is used to enable certain compiler features or checks. A pragma directive is always local to a source file, so you have to add the pragma to all your files if you want enable it in your whole projec
Solidity by Example — Solidity 0.4.24 documentation
Voting¶ The following contract is quite complex, but showcases a lot of Solidity’s features. It implements a voting contract. Of course, the main problems of electronic voting is how to assign voting rights to the correct persons and how to prevent manipulation. We will not solve all problems here, but at least we will show how delegated voting can be done so that vote counting is automatic and co
Solidity — Solidity 0.4.24 documentation
Solidity is a contract-oriented, high-level language for implementing smart contracts. It 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. As you will see, it is possible to create contracts for voting, crowdfunding, blind auct
Application Binary Interface Specification — Solidity 0.4.24 documentation
Basic Design¶ The Contract Application Binary Interface (ABI) is the standard way to interact with contracts in the Ethereum ecosystem, both from outside the blockchain and for contract-to-contract interaction. Data is encoded according to its type, as described in this specification. The encoding is not self describing and thus requires a schema in order to decode. We assume the interface functio
Solidity Assembly — Solidity 0.4.21 documentation
Solidity Assembly¶ Solidity defines an assembly language that can also be used without Solidity. This assembly language can also be used as “inline assembly” inside Solidity source code. We start with describing how to use inline assembly and how it differs from standalone assembly and then specify assembly itself. Inline Assembly¶ For more fine-grained control especially in order to enhance the l
Types — Solidity 0.4.21 documentation
Types¶ Solidity is a statically typed language, which means that the type of each variable (state and local) needs to be specified (or at least known - see Type Deduction below) at compile-time. Solidity provides several elementary types which can be combined to form complex types. In addition, types can interact with each other in expressions containing operators. For a quick reference of the var
List of Known Bugs — Solidity 0.5.12 documentation
List of Known Bugs¶ Below, you can find a JSON-formatted list of some of the known security-relevant bugs in the Solidity compiler. The file itself is hosted in the Github repository. The list stretches back as far as version 0.3.0, bugs known to be present only in versions preceding that are not listed. There is another file called bugs_by_version.json, which can be used to check which bugs affec
Introduction to Smart Contracts — Solidity 0.6.8 documentation
A Simple Smart Contract¶ Let us begin with a basic example that sets the value of a variable and exposes it for other contracts to access. It is fine if you do not understand everything right now, we will go into more detail later. // SPDX-License-Identifier: GPL-3.0 pragma solidity >=0.4.16 <0.7.0; contract SimpleStorage { uint storedData; function set(uint x) public { storedData = x; } function
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Security Considerations — Solidity 0.5.1 documentation
Solidity v0.5.0 Breaking Changes — Solidity 0.6.7 documentation
Solidity — Solidity 0.6.7 documentation
Introduction to Smart Contracts — Solidity 0.6.7 documentation
Miscellaneous — Solidity 0.5.12 documentation
Style Guide — Solidity 0.6.7 documentation
Solidity in Depth — Solidity 0.5.12 documentation
Expressions and Control Structures — Solidity 0.6.7 documentation
Types — Solidity 0.6.7 documentation
Contracts — Solidity 0.6.7 documentation
List of Known Bugs — Solidity 0.6.7 documentation
Solidity by Example — Solidity 0.6.7 documentation