mango-v4/programs/mango-v4/src/state/group.rs

use anchor_lang::prelude::*;
use static_assertions::const_assert_eq;
use std::mem::size_of;

// TODO: Assuming we allow up to 65536 different tokens
pub type TokenIndex = u16;

#[account(zero_copy)]
pub struct Group {
    // Relying on Anchor's discriminator be sufficient for our versioning needs?
    // pub meta_data: MetaData,
    pub admin: Pubkey,

    pub bump: u8,
    pub padding: [u8; 3],
    pub group_num: u32,
    pub reserved: [u8; 8],
}
const_assert_eq!(size_of::<Group>(), 48);
const_assert_eq!(size_of::<Group>() % 8, 0);

#[macro_export]
macro_rules! group_seeds {
    ( $group:expr ) => {
        &[
            b"Group".as_ref(),
            $group.admin.as_ref(),
            &$group.group_num.to_le_bytes(),
            &[$group.bump],
        ]
    };
}

pub use group_seeds;