open-payroll-sway built forc build format forc-fmt helpers some exaples to view: https://github.com/FuelLabs/sway-applications/blob/master/NFT/project/contracts/NFT-contract/src/ book of sway: https://fuellabs.github.io/sway/v0.42.0/book/basics/commonly_used_library_types.html?highlight=result#option fuel forum: https://forum.fuel.network/