rialo-sol-lang 0.10.2

Solana Sealevel eDSL
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// Copyright (c) Subzero Labs, Inc.
// SPDX-License-Identifier: Apache-2.0

//! Type validating that the account is the given Program

use std::{collections::BTreeSet, fmt, marker::PhantomData, ops::Deref};

use crate::{
    error::{Error, ErrorCode},
    rialo_s_program::{account_info::AccountInfo, instruction::AccountMeta, pubkey::Pubkey},
    AccountDeserialize, Accounts, AccountsExit, Id, Key, Result, ToAccountInfos, ToAccountMetas,
};

/// Type validating that the account is the given Program.
///
/// Checks:
///
/// - `account_info.key == expected_program`
/// - `account_info.executable == true`
///
/// # Out of the Box Types
///
/// Between the [`rialo_sol_lang`](https://docs.rs/anchor-lang/latest/rialo_sol_lang) and [`anchor_spl`](https://docs.rs/anchor_spl/latest/anchor_spl) crates,
/// the following `Program` types are provided out of the box:
///
/// - [`System`](https://docs.rs/anchor-lang/latest/rialo_sol_lang/struct.System.html)
/// - [`AssociatedToken`](https://docs.rs/anchor-spl/latest/anchor_spl/associated_token/struct.AssociatedToken.html)
/// - [`Token`](https://docs.rs/anchor-spl/latest/anchor_spl/token/struct.Token.html)
///
#[derive(Clone)]
pub struct Program<'info, T> {
    info: &'info AccountInfo<'info>,
    _phantom: PhantomData<T>,
}

impl<T: fmt::Debug> fmt::Debug for Program<'_, T> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_struct("Program").field("info", &self.info).finish()
    }
}

impl<'a, T> Program<'a, T> {
    pub(crate) fn new(info: &'a AccountInfo<'a>) -> Program<'a, T> {
        Self {
            info,
            _phantom: PhantomData,
        }
    }
}

impl<'a, T: Id> TryFrom<&'a AccountInfo<'a>> for Program<'a, T> {
    type Error = Error;
    /// Deserializes the given `info` into a `Program`.
    fn try_from(info: &'a AccountInfo<'a>) -> Result<Self> {
        if info.key != &T::id() {
            return Err(Error::from(ErrorCode::InvalidProgramId).with_pubkeys((*info.key, T::id())));
        }
        if !info.executable {
            return Err(ErrorCode::InvalidProgramExecutable.into());
        }

        Ok(Program::new(info))
    }
}

impl<'info, B, T: Id> Accounts<'info, B> for Program<'info, T> {
    #[inline(never)]
    fn try_accounts(
        _program_id: &Pubkey,
        accounts: &mut &'info [AccountInfo<'info>],
        _ix_data: &[u8],
        _bumps: &mut B,
        _reallocs: &mut BTreeSet<Pubkey>,
    ) -> Result<Self> {
        if accounts.is_empty() {
            return Err(ErrorCode::AccountNotEnoughKeys.into());
        }
        let account = &accounts[0];
        *accounts = &accounts[1..];
        Program::try_from(account)
    }
}

impl<T> ToAccountMetas for Program<'_, T> {
    fn to_account_metas(&self, is_signer: Option<bool>) -> Vec<AccountMeta> {
        let is_signer = is_signer.unwrap_or(self.info.is_signer);
        let meta = match self.info.is_writable {
            false => AccountMeta::new_readonly(*self.info.key, is_signer),
            true => AccountMeta::new(*self.info.key, is_signer),
        };
        vec![meta]
    }
}

impl<'info, T> ToAccountInfos<'info> for Program<'info, T> {
    fn to_account_infos(&self) -> Vec<AccountInfo<'info>> {
        vec![self.info.clone()]
    }
}

impl<'info, T> AsRef<AccountInfo<'info>> for Program<'info, T> {
    fn as_ref(&self) -> &AccountInfo<'info> {
        self.info
    }
}

impl<'info, T> Deref for Program<'info, T> {
    type Target = AccountInfo<'info>;

    fn deref(&self) -> &Self::Target {
        self.info
    }
}

impl<'info, T: AccountDeserialize> AccountsExit<'info> for Program<'info, T> {}

impl<T: AccountDeserialize> Key for Program<'_, T> {
    fn key(&self) -> Pubkey {
        *self.info.key
    }
}