If you want the full version and license for commercial use,
you can purchase here :

https://staircaselab.com/product/rose-pertiwi/

File include : 

1. Rose Pertiwi.otf
2. Rose Pertiwi.ttf
3. Rose Pertiwi.woff
4. Rose Pertiwi Italic.otf
5. Rose Pertiwi Italic.ttf
6. Rose Pertiwi Italic.woff