We don’t have an official spec on tokens for metadata yet, but you can follow on src we have here: SRC-20: Fungible token standard.
As we don’t have this metadata yet, currently, all tokens are treated on the wallet as having;
- 9 decimals.
- Metadata is fetched from the static file.
Tokens on fuel network are Native, and any contract can mint or burn its tokens.
Some examples of how to create contracts to mint and burn tokens;
https://fuellabs.github.io/sway/v0.32.2/book/blockchain-development/native_assets.html