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lang, spl: Program and Signer types (#705)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| use crate::error::ErrorCode; | ||
| use crate::*; | ||
| use solana_program::account_info::AccountInfo; | ||
| use solana_program::instruction::AccountMeta; | ||
| use solana_program::program_error::ProgramError; | ||
| use solana_program::pubkey::Pubkey; | ||
| use std::ops::Deref; | ||
|
|
||
| /// Account container that checks ownership on deserialization. | ||
| #[derive(Clone)] | ||
| pub struct Program<'info, T: Id + AccountDeserialize + Clone> { | ||
| account: T, | ||
| info: AccountInfo<'info>, | ||
| } | ||
|
|
||
| impl<'a, T: Id + AccountDeserialize + Clone> Program<'a, T> { | ||
| fn new(info: AccountInfo<'a>, account: T) -> Program<'a, T> { | ||
| Self { info, account } | ||
| } | ||
|
|
||
| /// Deserializes the given `info` into a `Program`. | ||
| #[inline(never)] | ||
| pub fn try_from(info: &AccountInfo<'a>) -> Result<Program<'a, T>, ProgramError> { | ||
| if info.key != &T::id() { | ||
| return Err(ErrorCode::InvalidProgramId.into()); | ||
| } | ||
| if !info.executable { | ||
| return Err(ErrorCode::InvalidProgramExecutable.into()); | ||
| } | ||
| // Programs have no data so use an empty slice. | ||
| let mut empty = &[][..]; | ||
| Ok(Program::new(info.clone(), T::try_deserialize(&mut empty)?)) | ||
| } | ||
| } | ||
|
|
||
| impl<'info, T: Id + Clone> Accounts<'info> for Program<'info, T> | ||
| where | ||
| T: Id + AccountDeserialize, | ||
| { | ||
| #[inline(never)] | ||
| fn try_accounts( | ||
| _program_id: &Pubkey, | ||
| accounts: &mut &[AccountInfo<'info>], | ||
| _ix_data: &[u8], | ||
| ) -> Result<Self, ProgramError> { | ||
| if accounts.is_empty() { | ||
| return Err(ErrorCode::AccountNotEnoughKeys.into()); | ||
| } | ||
| let account = &accounts[0]; | ||
| *accounts = &accounts[1..]; | ||
| Program::try_from(account) | ||
| } | ||
| } | ||
|
|
||
| impl<'info, T: Id + AccountDeserialize + Clone> ToAccountMetas for Program<'info, 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: Id + AccountDeserialize + Clone> ToAccountInfos<'info> for Program<'info, T> { | ||
| fn to_account_infos(&self) -> Vec<AccountInfo<'info>> { | ||
| vec![self.info.clone()] | ||
| } | ||
| } | ||
|
|
||
| impl<'info, T: Id + AccountDeserialize + Clone> ToAccountInfo<'info> for Program<'info, T> { | ||
| fn to_account_info(&self) -> AccountInfo<'info> { | ||
| self.info.clone() | ||
| } | ||
| } | ||
|
|
||
| impl<'info, T: Id + AccountDeserialize + Clone> AsRef<AccountInfo<'info>> for Program<'info, T> { | ||
| fn as_ref(&self) -> &AccountInfo<'info> { | ||
| &self.info | ||
| } | ||
| } | ||
|
|
||
| impl<'info, T: Id + AccountDeserialize + Clone> Deref for Program<'info, T> { | ||
| type Target = AccountInfo<'info>; | ||
|
|
||
| fn deref(&self) -> &Self::Target { | ||
| &self.info | ||
| } | ||
| } | ||
|
|
||
| impl<'info, T: AccountDeserialize + Id + Clone> AccountsExit<'info> for Program<'info, T> { | ||
| fn exit(&self, _program_id: &Pubkey) -> ProgramResult { | ||
| // No-op. | ||
| Ok(()) | ||
| } | ||
| } |
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