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use crate::error::ErrorCode;
use crate::{
AccountDeserialize, AccountSerialize, Accounts, AccountsExit, CpiStateContext, ProgramState,
ToAccountInfo, ToAccountInfos, ToAccountMetas,
};
use solana_program::account_info::AccountInfo;
use solana_program::entrypoint::ProgramResult;
use solana_program::instruction::AccountMeta;
use solana_program::program_error::ProgramError;
use solana_program::pubkey::Pubkey;
use std::ops::{Deref, DerefMut};
#[derive(Clone)]
pub struct CpiState<'info, T: AccountSerialize + AccountDeserialize + Clone> {
inner: Box<Inner<'info, T>>,
}
#[derive(Clone)]
struct Inner<'info, T: AccountSerialize + AccountDeserialize + Clone> {
info: AccountInfo<'info>,
account: T,
}
impl<'info, T: AccountSerialize + AccountDeserialize + Clone> CpiState<'info, T> {
pub fn new(i: AccountInfo<'info>, account: T) -> CpiState<'info, T> {
Self {
inner: Box::new(Inner { info: i, account }),
}
}
#[inline(never)]
pub fn try_from(info: &AccountInfo<'info>) -> Result<CpiState<'info, T>, ProgramError> {
let mut data: &[u8] = &info.try_borrow_data()?;
Ok(CpiState::new(info.clone(), T::try_deserialize(&mut data)?))
}
fn seed() -> &'static str {
ProgramState::<T>::seed()
}
pub fn address(program_id: &Pubkey) -> Pubkey {
let (base, _nonce) = Pubkey::find_program_address(&[], program_id);
let seed = Self::seed();
let owner = program_id;
Pubkey::create_with_seed(&base, seed, owner).unwrap()
}
pub fn context<'a, 'b, 'c, A: Accounts<'info>>(
&self,
program: AccountInfo<'info>,
accounts: A,
) -> CpiStateContext<'a, 'b, 'c, 'info, A> {
CpiStateContext::new(program, self.inner.info.clone(), accounts)
}
}
impl<'info, T> Accounts<'info> for CpiState<'info, T>
where
T: AccountSerialize + AccountDeserialize + Clone,
{
#[inline(never)]
fn try_accounts(
_program_id: &Pubkey,
accounts: &mut &[AccountInfo<'info>],
) -> Result<Self, ProgramError> {
if accounts.is_empty() {
return Err(ErrorCode::AccountNotEnoughKeys.into());
}
let account = &accounts[0];
*accounts = &accounts[1..];
CpiState::try_from(account)
}
}
impl<'info, T: AccountSerialize + AccountDeserialize + Clone> ToAccountMetas
for CpiState<'info, T>
{
fn to_account_metas(&self, is_signer: Option<bool>) -> Vec<AccountMeta> {
let is_signer = is_signer.unwrap_or(self.inner.info.is_signer);
let meta = match self.inner.info.is_writable {
false => AccountMeta::new_readonly(*self.inner.info.key, is_signer),
true => AccountMeta::new(*self.inner.info.key, is_signer),
};
vec![meta]
}
}
impl<'info, T: AccountSerialize + AccountDeserialize + Clone> ToAccountInfos<'info>
for CpiState<'info, T>
{
fn to_account_infos(&self) -> Vec<AccountInfo<'info>> {
vec![self.inner.info.clone()]
}
}
impl<'info, T: AccountSerialize + AccountDeserialize + Clone> ToAccountInfo<'info>
for CpiState<'info, T>
{
fn to_account_info(&self) -> AccountInfo<'info> {
self.inner.info.clone()
}
}
impl<'info, T: AccountSerialize + AccountDeserialize + Clone> Deref for CpiState<'info, T> {
type Target = T;
fn deref(&self) -> &Self::Target {
&(*self.inner).account
}
}
impl<'info, T: AccountSerialize + AccountDeserialize + Clone> DerefMut for CpiState<'info, T> {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut DerefMut::deref_mut(&mut self.inner).account
}
}
impl<'info, T: AccountSerialize + AccountDeserialize + Clone> AccountsExit<'info>
for CpiState<'info, T>
{
fn exit(&self, _program_id: &Pubkey) -> ProgramResult {
Ok(())
}
}