https://github.com/onflow/cadence

Cadence, the resource-oriented smart contract programming language 🏃‍♂️
https://github.com/onflow/cadence

cadence language onflow programming-language smart-contracts

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Cadence, the resource-oriented smart contract programming language 🏃‍♂️

• Host: GitHub
• URL: https://github.com/onflow/cadence
• Owner: onflow
• License: apache-2.0
• Created: 2020-04-17T23:09:27.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2024-10-29T22:21:35.000Z (2 months ago)
• Last Synced: 2024-10-30T00:43:34.680Z (2 months ago)
• Topics: cadence, language, onflow, programming-language, smart-contracts
• Language: Go
• Homepage: https://cadence-lang.org
• Size: 79.9 MB
• Stars: 533
• Watchers: 43
• Forks: 140
• Open Issues: 161
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE
  • Code of conduct: CODE_OF_CONDUCT.md
  • Codeowners: CODEOWNERS
  • Security: SECURITY.md
  • Roadmap: ROADMAP.md

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README

        
[![CI](https://github.com/onflow/cadence/actions/workflows/ci.yml/badge.svg)](https://github.com/onflow/cadence/actions/workflows/ci.yml)

# Cadence



## Introduction

Cadence is a resource-oriented programming language that introduces new features

to smart contract programming that help developers ensure that their code is

safe, secure, clear, and approachable.

Some of these features are:

- Type safety and a strong static type system

- Resource-oriented programming, a new paradigm that pairs linear types with

  object capabilities to create a secure and declarative model for digital

  ownership by ensuring that resources (and their associated assets) can only

  exist in one location at a time, cannot be copied, and cannot be accidentally

  lost or deleted

- Built-in pre-conditions and post-conditions for functions and transactions

- The utilization of capability-based security, which enforces access control by

  requiring that access to objects is restricted to only the owner and those who

  have a valid reference to the object

## Getting Started

To get started writing Cadence, why not try out the

[Playground](https://play.onflow.org/)?

If you want to develop locally, use these tools: 

* [Flow CLI](https://github.com/onflow/flow-cli),

	which includes the [Flow emulator](https://github.com/onflow/flow-emulator). The emulator is a lightweight tool that emulates the behaviour of the real Flow network.

* [Visual Studio Code extension](https://github.com/onflow/vscode-cadence). The Visual Studio Code extension enables the development, deployment of, and interaction with Cadence contracts.

## Documentation

Check out the [Cadence Docs](https://docs.onflow.org/cadence/language/).

## Contributing

If you would like to contribute to Cadence, have a look at the [contributing guide](https://github.com/onflow/cadence/blob/master/CONTRIBUTING.md).

Development documentation can be found in the [`/docs` directory](https://github.com/onflow/cadence/tree/master/docs).

For example, it contains the source for the language reference.