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118 lines
3.8 KiB
Markdown
118 lines
3.8 KiB
Markdown
# The Leo Programming Language
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[](https://codecov.io/gh/AleoHQ/leo)
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Leo is a functional, statically-typed programming language built for writing private applications.
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## <a name='TableofContents'></a>Table of Contents
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* [1. Overview](#1-overview)
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* [2. Build Guide](#2-build-guide)
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* [2.1 Install Rust](#21-install-rust)
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* [2.2a Build from Crates.io](#22a-build-from-cratesio)
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* [2.2b Build from Source Code](#22b-build-from-source-code)
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* [3. Quick Start](#3-quick-start)
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* [4. Documentation](#4-documentation)
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* [5. Contributing](#5-contributing)
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* [6. License](#6-license)
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## 1. Overview
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Welcome to the Leo programming language.
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Leo exists to provide a simple high-level language that abstracts low-level cryptographic concepts and makes it easy to
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integrate private applications into your stack. Leo compiles to R1CS circuits making zero-knowledge proofs practical.
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With Leo, you can support zero-knowledge tokens, private stable coins, and decentralized marketplaces.
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The syntax of Leo is influenced by JavaScript, Python, Scala, and Rust with a strong emphasis on readability and ease-of-use.
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Leo provides developers with never before seen tools to sanity check circuits including unit tests, integration tests, and console functions.
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Leo is one part of a greater ecosystem for building private applications on [Aleo](https://aleo.org/). If your goal is to build a user experience
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on the web that is both truly personal and truly private, then we recommend downloading the [Aleo Studio IDE](https://aleo.studio/)
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and checking out the [Aleo Package Manager]().
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## 2. Build Guide
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### 2.1 Install Rust
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We recommend installing Rust using [rustup](https://www.rustup.rs/). You can install `rustup` as follows:
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- macOS or Linux:
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```bash
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curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
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```
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- Windows (64-bit):
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Download the [Windows 64-bit executable](https://win.rustup.rs/x86_64) and follow the on-screen instructions.
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- Windows (32-bit):
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Download the [Windows 32-bit executable](https://win.rustup.rs/i686) and follow the on-screen instructions.
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### 2.2a Build from Crates.io
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We recommend installing Leo this way. In your terminal, run:
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```bash
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cargo install leo
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```
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Now to use Leo, in your terminal, run:
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```bash
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leo
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```
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### 2.2b Build from Source Code
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Alternatively, you can install Leo by building from the source code as follows:
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```bash
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# Download the source code
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git clone https://github.com/AleoHQ/leo
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cd leo
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# Build in release mode
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$ cargo build --release
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```
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This will generate an executable under the `./target/release` directory. To run snarkOS, run the following command:
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```bash
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./target/release/leo
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```
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## 3. Quick Start
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Use the Leo CLI to create a new project
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```bash
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# create a new `hello_world` Leo project
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leo new hello_world
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cd hello_world
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# build & setup & prove & verify
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leo run
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```
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The `leo new` command creates a new Leo project with a given name.
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The `leo run` command will compile the main program, generate keys for a trusted setup, fetch inputs, generate a proof and verify it.
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Congratulations! You've just run your first Leo program.
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## 4. Documentation
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* [Hello World - Next Steps](https://developer.aleo.org/developer/getting_started/hello_world)
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* [Leo Language Documentation](https://developer.aleo.org/developer/language/layout)
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* [Leo CLI Documentation](https://developer.aleo.org/developer/cli/new)
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* [Homepage](https://developer.aleo.org/developer/getting_started/overview)
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## 5. Contributing
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Please see our guidelines in the [developer documentation](https://developer.aleo.org/developer/additional_material/contributing)
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Thank you for helping make Leo better!
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## 6. License
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[](./LICENSE.md) |