113 lines
3.0 KiB
Rust
113 lines
3.0 KiB
Rust
//! Type validating that the account signed the transaction
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use crate::error::ErrorCode;
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use crate::{Accounts, AccountsExit, Key, Result, ToAccountInfos, ToAccountMetas};
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use solana_program::account_info::AccountInfo;
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use solana_program::instruction::AccountMeta;
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use solana_program::pubkey::Pubkey;
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use std::collections::{BTreeMap, BTreeSet};
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use std::ops::Deref;
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/// Type validating that the account signed the transaction. No other ownership
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/// or type checks are done. If this is used, one should not try to access the
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/// underlying account data.
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///
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/// Checks:
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///
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/// - `Signer.info.is_signer == true`
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///
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/// # Example
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/// ```ignore
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/// #[account]
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/// #[derive(Default)]
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/// pub struct MyData {
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/// pub data: u64
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/// }
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///
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/// #[derive(Accounts)]
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/// pub struct Example<'info> {
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/// #[account(init, payer = payer)]
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/// pub my_acc: Account<'info, MyData>,
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/// #[account(mut)]
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/// pub payer: Signer<'info>,
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/// pub system_program: Program<'info, System>
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/// }
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/// ```
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///
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/// When creating an account with `init`, the `payer` needs to sign the transaction.
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#[derive(Debug, Clone)]
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pub struct Signer<'info> {
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info: AccountInfo<'info>,
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}
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impl<'info> Signer<'info> {
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fn new(info: AccountInfo<'info>) -> Signer<'info> {
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Self { info }
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}
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/// Deserializes the given `info` into a `Signer`.
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#[inline(never)]
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pub fn try_from(info: &AccountInfo<'info>) -> Result<Signer<'info>> {
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if !info.is_signer {
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return Err(ErrorCode::AccountNotSigner.into());
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}
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Ok(Signer::new(info.clone()))
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}
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}
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impl<'info> Accounts<'info> for Signer<'info> {
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#[inline(never)]
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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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_ix_data: &[u8],
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_bumps: &mut BTreeMap<String, u8>,
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_reallocs: &mut BTreeSet<Pubkey>,
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) -> Result<Self> {
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if accounts.is_empty() {
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return Err(ErrorCode::AccountNotEnoughKeys.into());
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}
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let account = &accounts[0];
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*accounts = &accounts[1..];
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Signer::try_from(account)
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}
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}
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impl<'info> AccountsExit<'info> for Signer<'info> {}
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impl<'info> ToAccountMetas for Signer<'info> {
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fn to_account_metas(&self, is_signer: Option<bool>) -> Vec<AccountMeta> {
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let is_signer = is_signer.unwrap_or(self.info.is_signer);
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let meta = match self.info.is_writable {
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false => AccountMeta::new_readonly(*self.info.key, is_signer),
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true => AccountMeta::new(*self.info.key, 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> ToAccountInfos<'info> for Signer<'info> {
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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> AsRef<AccountInfo<'info>> for Signer<'info> {
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fn as_ref(&self) -> &AccountInfo<'info> {
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&self.info
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}
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}
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impl<'info> Deref for Signer<'info> {
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type Target = AccountInfo<'info>;
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fn deref(&self) -> &Self::Target {
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&self.info
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}
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}
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impl<'info> Key for Signer<'info> {
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fn key(&self) -> Pubkey {
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*self.info.key
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}
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}
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