Hyperlight JavaScript

Hyperlight JavaScript is a runtime for executing JavaScript within the Hyperlight secure boundary. It provides the ability to cold start JS applications in single digit milliseconds, perfect for the basis of a functions runtime. The runtime also provides the ability to register host functions which allow for extending functionality of the guest JavaScript code executing within the hypervisor-protected boundary.

use hyperlight_js::{SandboxBuilder, Script};

fn main() -> anyhow::Result<()> {
    // Create a sandbox and load the JS runtime
    let proto = SandboxBuilder::new().build()?;
    let mut js_sandbox = proto.load_runtime()?;

    // Register a JavaScript handler inline
    let handler = Script::from_string(r#"
        function fibonacci(n) {
            if (n <= 0) return 0;
            if (n === 1) return 1;
            return fibonacci(n - 1) + fibonacci(n - 2);
        }

        function handler({ n }) {
            return { fib: fibonacci(n) };
        }

        export { handler };
    "#)?;
    js_sandbox.add_handler("fibonacci".to_string(), handler)?;

    // Load the sandbox and invoke the handler with a JSON event
    let mut loaded = js_sandbox.get_loaded_sandbox()?;
    let result = loaded.handle_event(
        "fibonacci".to_string(),
        r#"{ "n": 10 }"#.to_string(),
        None,
    )?;
    println!("{result}"); // {"fib":55}

    Ok(())
}