Popularity

9.8

Stable

Activity

8.4

Growing

Stars 266

Watchers 42

Forks 81

Last Commit 2 days ago

Monthly Downloads: 41

Programming language: Rust

License: LicenseRef-Apache

Tags: Codec

Latest version: v0.7.15

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README

Candid

Candid is an interface description language (IDL) for interacting with canisters (also known as services or actors) running on the Internet Computer. It provides a language-independent description of canister interfaces and the data they exchange, with type safety and extensibility.

Documentation

The [spec](spec/) directory contains Candid specifications, including the [Candid language specification](spec/Candid.md) and a soundness proof.
The official manual is hosted by dfinity; see [./docs](docs/) for the source code.

Implementations

Candid supports several different programming languages. This repository contains some of the implementations developed by DFINITY.

[Rust](rust/): A serialization library based on Serde, and a compiler for generating bindings for other languages.
Motoko: Compiler support for importing/export Candid files. Also see the Motoko-Candid type mapping specificatoin.
JavaScript: We provide a library for serialization of native JavaScript values, and a visitor class for extending Candid for building generic tools such as UI and random testing.

A list of community maintained Candid libraries:

Tools

[didc](tools/didc): Candid CLI. Download prebuilt binary.
[candiff](tools/candiff): Diff Candid values structurally
[ui](tools/ui): Candid UI canister. See deployed canister on the IC
ic-repl: A REPL environment to communicate with canisters using Candid

Tests

We provide a [test suite](test/) to check Candid implementations for compliance.

Release

To make a release in this repo:

Update Changelog.md and merge the PR into master.
git tag 2020-04-01 -m "2020-04-01"
git push origin 2020-04-01

The tag is always today's date. As the repo contains several targets, it is hard to give a version to the tag.

Contribution

See our [CONTRIBUTING](.github/CONTRIBUTING.md) and [CODE OF CONDUCT](.github/CODE_OF_CONDUCT.md) to get started.

candid

Candid Library for the Internet Computer