Support for additional Token22 extensions

[Ikrk]

Hello,
this PR extends the original Token22 Extensions PR #2789 and adds support for additional token mint extensions, namely:

• transfer fee
• interest bearing
• non-transferable
• default account state

An example of initialization:

const BASIS_POINTS: u16 = 100;
const MAX_FEE: u64 = 10000;
const RATE: i16 = 100;

#[account(
    init,
    ...
    extensions::non_transferable,
    extensions::transfer_fee::config_authority = authority,
    extensions::transfer_fee::withheld_authority = authority,
    extensions::transfer_fee::basis_points = BASIS_POINTS,
    extensions::transfer_fee::max_fee = MAX_FEE,
    extensions::interest_bearing::authority = authority,
    extensions::interest_bearing::rate = RATE,
    extensions::default_account_state::state = AccountState::Frozen,
)]
pub mint: Box<InterfaceAccount<'info, Mint>>,

An example of constraints check:

#[account(
    extensions::non_transferable,
    extensions::transfer_fee::config_authority = authority,
    extensions::transfer_fee::withheld_authority = authority,
    extensions::interest_bearing::authority = authority,
    extensions::default_account_state::state = AccountState::Frozen,
)]
pub mint: Box<InterfaceAccount<'info, Mint>>,

Checking of constraints extensions::transfer_fee::basis_points, extensions::transfer_fee::max_fee and extensions::interest_bearing::rate is currently not supported.

Also I was wondering if it would not be better to have ex. extensions::non_transferable = false instead of only being able to check if the non-transferable extension is enabled?

Fixes #3088.

Let me know what you think. Thanks!

[tiago18c]

Hey @Ikrk , can you rebase?

[vercel]

@Ikrk is attempting to deploy a commit to the Solana Foundation Team on Vercel.

A member of the Team first needs to authorize it.

[Ikrk]

Hey @Ikrk , can you rebase?

@tiago18c done

[Ikrk]

Hey @tiago18c , I have fixed the formatting issue. Can you please approve and re-run the workflows? Thanks!

[jamie-osec]

Some of these have been implemented elsewhere:

• Interest Bearing: Add interest bearing mint extension #4464
• Non Transferable: spl: Add create_native_mint & initialize_non_transferable_mint #3512

In the interests of reducing open PRs and because there are significant conflicts here, I'm going to close this. Feel free to open separate PRs for the transfer fee and default account state extensions, including rebasing and updating error codes.