Capsule

Capsule is an out-of-box development framework for creating smart contract on Nervos' CKB.

Capsule consists of:

• Capsule CLI - Scaffolding tool.

CKB supports several programming languages for writing scripts, and the language supporting libraries are maintained in the following repositories:

• ckb-std - Rust
• ckb-c-stdlib - C
• ckb-lua - Lua

Installation

Supported Environments

• Linux
• macOS
• Windows (WSL2)

Prerequisites

The following must be installed and available to use Capsule.

• cargo and rust - Capsule uses cargo to generate Rust contracts and run tests. https://www.rust-lang.org/tools/install.
• docker - Capsule uses docker container to reproducible build contracts. It's also used by cross. https://docs.docker.com/get-docker/
• cross. Capsule uses cross to build rust contracts. Install with

$ cargo install cross --git https://github.com/cross-rs/cross --rev=6982b6c

Note: All commands must be accessible in the PATH in order for them to be used by Capsule.

Note: The current user must have permission to manage Docker instances. How to manage Docker as a non-root user.

Install binary

Download the latest release

Cargo install

Install the latest version

cargo install ckb-capsule --locked

Install the develop branch

cargo install ckb-capsule --git https://github.com/nervosnetwork/capsule.git --branch develop --locked

Usage

capsule help

Quick Start

# check environment
capsule check

# create project
capsule new my-demo
cd my-demo
capsule build
capsule test

Project Layout

• capsule.toml - Capsule manifest file.
• contracts - Contracts directory.
• tests - Contracts tests.
• build - Contracts binaries.

Documentation

Capsule Wiki on GitHub

Upgrading to Capsule 0.10

Upgrade an existing project to capsule 0.10

LICENSE

MIT