144 lines
4.5 KiB
Rust
144 lines
4.5 KiB
Rust
use crate::{
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AccountDeserialize, AccountSerialize, Accounts, AccountsInit, CpiAccount, ToAccountInfo,
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ToAccountInfos, ToAccountMetas,
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};
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use solana_sdk::account_info::AccountInfo;
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use solana_sdk::instruction::AccountMeta;
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use solana_sdk::program_error::ProgramError;
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use solana_sdk::pubkey::Pubkey;
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use std::ops::{Deref, DerefMut};
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/// Container for a serializable `account`. Use this to reference any account
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/// owned by the currently executing program.
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#[derive(Clone)]
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pub struct ProgramAccount<'a, T: AccountSerialize + AccountDeserialize + Clone> {
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info: AccountInfo<'a>,
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account: T,
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}
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impl<'a, T: AccountSerialize + AccountDeserialize + Clone> ProgramAccount<'a, T> {
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pub fn new(info: AccountInfo<'a>, account: T) -> ProgramAccount<'a, T> {
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Self { info, account }
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}
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/// Deserializes the given `info` into a `ProgramAccount`.
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pub fn try_from(info: &AccountInfo<'a>) -> Result<ProgramAccount<'a, T>, ProgramError> {
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let mut data: &[u8] = &info.try_borrow_data()?;
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Ok(ProgramAccount::new(
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info.clone(),
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T::try_deserialize(&mut data)?,
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))
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}
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/// Deserializes the zero-initialized `info` into a `ProgramAccount` without
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/// checking the account type. This should only be used upon program account
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/// initialization (since the entire account data array is zeroed and thus
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/// no account type is set).
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pub fn try_from_init(info: &AccountInfo<'a>) -> Result<ProgramAccount<'a, T>, ProgramError> {
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let mut data: &[u8] = &info.try_borrow_data()?;
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// The discriminator should be zero, since we're initializing.
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let mut disc_bytes = [0u8; 8];
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disc_bytes.copy_from_slice(&data[..8]);
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let discriminator = u64::from_le_bytes(disc_bytes);
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if discriminator != 0 {
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return Err(ProgramError::InvalidAccountData);
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}
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Ok(ProgramAccount::new(
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info.clone(),
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T::try_deserialize_unchecked(&mut data)?,
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))
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}
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}
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impl<'info, T> Accounts<'info> for ProgramAccount<'info, T>
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where
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T: AccountSerialize + AccountDeserialize + Clone,
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{
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fn try_accounts(
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program_id: &Pubkey,
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accounts: &mut &[AccountInfo<'info>],
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) -> Result<Self, ProgramError> {
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if accounts.len() == 0 {
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return Err(ProgramError::NotEnoughAccountKeys);
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}
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let account = &accounts[0];
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*accounts = &accounts[1..];
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let pa = ProgramAccount::try_from(account)?;
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if pa.info.owner != program_id {}
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Ok(pa)
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}
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}
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impl<'info, T> AccountsInit<'info> for ProgramAccount<'info, T>
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where
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T: AccountSerialize + AccountDeserialize + Clone,
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{
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fn try_accounts_init(
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_program_id: &Pubkey,
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accounts: &mut &[AccountInfo<'info>],
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) -> Result<Self, ProgramError> {
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if accounts.len() == 0 {
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return Err(ProgramError::NotEnoughAccountKeys);
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}
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let account = &accounts[0];
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*accounts = &accounts[1..];
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ProgramAccount::try_from_init(account)
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}
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}
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impl<'info, T: AccountSerialize + AccountDeserialize + Clone> ToAccountMetas
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for ProgramAccount<'info, T>
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{
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fn to_account_metas(&self) -> Vec<AccountMeta> {
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let meta = match self.info.is_writable {
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false => AccountMeta::new_readonly(*self.info.key, self.info.is_signer),
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true => AccountMeta::new(*self.info.key, self.info.is_signer),
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};
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vec![meta]
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}
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}
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impl<'info, T: AccountSerialize + AccountDeserialize + Clone> ToAccountInfos<'info>
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for ProgramAccount<'info, T>
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{
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fn to_account_infos(&self) -> Vec<AccountInfo<'info>> {
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vec![self.info.clone()]
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}
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}
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impl<'info, T: AccountSerialize + AccountDeserialize + Clone> ToAccountInfo<'info>
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for ProgramAccount<'info, T>
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{
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fn to_account_info(&self) -> AccountInfo<'info> {
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self.info.clone()
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}
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}
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impl<'a, T: AccountSerialize + AccountDeserialize + Clone> Deref for ProgramAccount<'a, T> {
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type Target = T;
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fn deref(&self) -> &Self::Target {
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&self.account
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}
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}
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impl<'a, T: AccountSerialize + AccountDeserialize + Clone> DerefMut for ProgramAccount<'a, T> {
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fn deref_mut(&mut self) -> &mut Self::Target {
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&mut self.account
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}
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}
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impl<'info, T> From<CpiAccount<'info, T>> for ProgramAccount<'info, T>
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where
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T: AccountSerialize + AccountDeserialize + Clone,
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{
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fn from(a: CpiAccount<'info, T>) -> Self {
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Self {
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info: a.to_account_info(),
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account: Deref::deref(&a).clone(),
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}
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}
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}
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