Installation

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Quasar is in beta. There are no published crate releases yet. Install from source by cloning the repository.

Prerequisites

# Rust
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

# Solana CLI
sh -c "$(curl -sSfL https://release.anza.xyz/stable/install)"

Install the Quasar CLI

cargo install quasar-cli

Verify with quasar --version.

Toolchain

Quasar compiles programs to SBF (Solana Bytecode Format). Two toolchains are available:

Toolchain	Build command	Notes
Solana (default)	`cargo build-sbf`	Uses the Solana CLI. No extra setup.
Upstream	`cargo +nightly build`	Targets `bpfel-unknown-none` with `sbpf-linker`. Smaller binaries, nightly features.

Choose during quasar init or set in Quasar.toml:

[toolchain]
type = "solana"

Upstream setup

The upstream toolchain requires nightly Rust, the SBF target, and the linker:

rustup toolchain install nightly
rustup target add bpfel-unknown-none --toolchain nightly
cargo install sbpf-linker

Editor setup

Install rust-analyzer. Quasar programs use #![no_std] and cfg(target_os = "solana") -- the generated Cargo.toml configures check-cfg so rust-analyzer won't warn about either.

Next steps

Head to the Quickstart to scaffold and build your first program.