ore/src/utils.rs

use num_enum::{IntoPrimitive, TryFromPrimitive};
use solana_program::{
    account_info::AccountInfo, entrypoint::ProgramResult, program_error::ProgramError,
    pubkey::Pubkey, rent::Rent, sysvar::Sysvar,
};

/// Creates a new pda
#[inline(always)]
pub(crate) fn create_pda<'a, 'info>(
    target_account: &'a AccountInfo<'info>,
    owner: &Pubkey,
    space: usize,
    pda_seeds: &[&[u8]],
    system_program: &'a AccountInfo<'info>,
    payer: &'a AccountInfo<'info>,
) -> ProgramResult {
    let rent = Rent::get()?;
    solana_program::program::invoke_signed(
        &solana_program::system_instruction::create_account(
            payer.key,
            target_account.key,
            rent.minimum_balance(space as usize),
            space as u64,
            owner,
        ),
        &[
            payer.clone(),
            target_account.clone(),
            system_program.clone(),
        ],
        &[pda_seeds],
    )?;
    Ok(())
}

#[repr(u8)]
#[derive(Clone, Copy, Debug, Eq, PartialEq, IntoPrimitive, TryFromPrimitive)]
pub enum AccountDiscriminator {
    Bus = 100,
    Proof = 101,
    Treasury = 102,
}

pub trait Discriminator {
    fn discriminator() -> AccountDiscriminator;
}

#[macro_export]
macro_rules! impl_to_bytes {
    ($struct_name:ident) => {
        impl $struct_name {
            pub fn to_bytes(&self) -> &[u8] {
                bytemuck::bytes_of(self)
            }
        }
    };
}

pub trait AccountDeserialize {
    fn try_from_bytes(data: &[u8]) -> Result<&Self, ProgramError>;
    fn try_from_bytes_mut(data: &mut [u8]) -> Result<&mut Self, ProgramError>;
}

#[macro_export]
macro_rules! impl_account_from_bytes {
    ($struct_name:ident) => {
        impl crate::utils::AccountDeserialize for $struct_name {
            fn try_from_bytes(
                data: &[u8],
            ) -> Result<&Self, solana_program::program_error::ProgramError> {
                if (Self::discriminator() as u8).ne(&data[0]) {
                    return Err(solana_program::program_error::ProgramError::InvalidAccountData);
                }
                bytemuck::try_from_bytes::<Self>(&data[8..]).or(Err(
                    solana_program::program_error::ProgramError::InvalidAccountData,
                ))
            }
            fn try_from_bytes_mut(
                data: &mut [u8],
            ) -> Result<&mut Self, solana_program::program_error::ProgramError> {
                if (Self::discriminator() as u8).ne(&data[0]) {
                    return Err(solana_program::program_error::ProgramError::InvalidAccountData);
                }
                bytemuck::try_from_bytes_mut::<Self>(&mut data[8..]).or(Err(
                    solana_program::program_error::ProgramError::InvalidAccountData,
                ))
            }
        }
    };
}

#[macro_export]
macro_rules! impl_instruction_from_bytes {
    ($struct_name:ident) => {
        impl $struct_name {
            pub fn try_from_bytes(
                data: &[u8],
            ) -> Result<&Self, solana_program::program_error::ProgramError> {
                bytemuck::try_from_bytes::<Self>(data).or(Err(
                    solana_program::program_error::ProgramError::InvalidInstructionData,
                ))
            }
        }
    };
}