76 lines
2.3 KiB
Rust
76 lines
2.3 KiB
Rust
use crate::{Accounts, AccountsExit, AccountsInit, 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;
|
|
|
|
impl<'info> Accounts<'info> for AccountInfo<'info> {
|
|
fn try_accounts(
|
|
_program_id: &Pubkey,
|
|
accounts: &mut &[AccountInfo<'info>],
|
|
) -> Result<Self, ProgramError> {
|
|
if accounts.len() == 0 {
|
|
return Err(ProgramError::NotEnoughAccountKeys);
|
|
}
|
|
let account = &accounts[0];
|
|
*accounts = &accounts[1..];
|
|
Ok(account.clone())
|
|
}
|
|
}
|
|
|
|
impl<'info> AccountsInit<'info> for AccountInfo<'info> {
|
|
fn try_accounts_init(
|
|
_program_id: &Pubkey,
|
|
accounts: &mut &[AccountInfo<'info>],
|
|
) -> Result<Self, ProgramError> {
|
|
if accounts.len() == 0 {
|
|
return Err(ProgramError::NotEnoughAccountKeys);
|
|
}
|
|
|
|
let account = &accounts[0];
|
|
*accounts = &accounts[1..];
|
|
|
|
// The discriminator should be zero, since we're initializing.
|
|
let data: &[u8] = &account.try_borrow_data()?;
|
|
let mut disc_bytes = [0u8; 8];
|
|
disc_bytes.copy_from_slice(&data[..8]);
|
|
let discriminator = u64::from_le_bytes(disc_bytes);
|
|
if discriminator != 0 {
|
|
return Err(ProgramError::InvalidAccountData);
|
|
}
|
|
|
|
Ok(account.clone())
|
|
}
|
|
}
|
|
|
|
impl<'info> ToAccountMetas for AccountInfo<'info> {
|
|
fn to_account_metas(&self, is_signer: Option<bool>) -> Vec<AccountMeta> {
|
|
let is_signer = is_signer.unwrap_or(self.is_signer);
|
|
let meta = match self.is_writable {
|
|
false => AccountMeta::new_readonly(*self.key, is_signer),
|
|
true => AccountMeta::new(*self.key, is_signer),
|
|
};
|
|
vec![meta]
|
|
}
|
|
}
|
|
|
|
impl<'info> ToAccountInfos<'info> for AccountInfo<'info> {
|
|
fn to_account_infos(&self) -> Vec<AccountInfo<'info>> {
|
|
vec![self.clone()]
|
|
}
|
|
}
|
|
|
|
impl<'info> ToAccountInfo<'info> for AccountInfo<'info> {
|
|
fn to_account_info(&self) -> AccountInfo<'info> {
|
|
self.clone()
|
|
}
|
|
}
|
|
|
|
impl<'info> AccountsExit<'info> for AccountInfo<'info> {
|
|
fn exit(&self, _program_id: &Pubkey) -> ProgramResult {
|
|
// no-op
|
|
Ok(())
|
|
}
|
|
}
|