Nature is...

import emoji.services.api.{new, ctx_t} // package: https://github.com/weiwenhao/emoji-api

fn main() {
    var app = new()

    app.use(fn(ptr<ctx_t> c):void! {
        c.next()
    })

    app.get('/hello/:msg', fn(ptr<ctx_t> c):void! {
        return c.json(200, {'message': 'ok', 'data': 'hello ' + c.param('msg')})
    })

    app.listen(8888)
}