Standard Library

Jolt supports the full Rust standard library. To enable support, simply add the guest-std feature to the Jolt import in the guest's Cargo.toml file and remove the #![cfg_attr(feature = "guest", no_std)] directive from the guest code.

Example

#![allow(unused)]
fn main() {
[package]
name = "guest"
version = "0.1.0"
edition = "2021"

[[bin]]
name = "guest"
path = "./src/lib.rs"

[features]
guest = []

[dependencies]
jolt = { package = "jolt-sdk", git = "https://github.com/a16z/jolt", features = ["guest-std"] }
}

#![allow(unused)]
#![no_main]

fn main() {
#[jolt::provable]
fn int_to_string(n: i32) -> String {
    n.to_string()
}
}