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use crate::{
account::{Account, KeyedAccount},
account_info::AccountInfo,
instruction::InstructionError,
pubkey::Pubkey,
};
pub mod clock;
pub mod epoch_schedule;
pub mod fees;
pub mod recent_blockhashes;
pub mod rent;
pub mod rewards;
pub mod slot_hashes;
pub mod stake_history;
pub fn is_sysvar_id(id: &Pubkey) -> bool {
clock::check_id(id)
|| epoch_schedule::check_id(id)
|| fees::check_id(id)
|| recent_blockhashes::check_id(id)
|| rent::check_id(id)
|| rewards::check_id(id)
|| slot_hashes::check_id(id)
|| stake_history::check_id(id)
}
#[macro_export]
macro_rules! declare_sysvar_id(
($name:expr, $type:ty) => (
$crate::declare_id!($name);
impl $crate::sysvar::SysvarId for $type {
fn check_id(pubkey: &$crate::pubkey::Pubkey) -> bool {
check_id(pubkey)
}
}
#[cfg(test)]
#[test]
fn test_sysvar_id() {
if !$crate::sysvar::is_sysvar_id(&id()) {
panic!("sysvar::is_sysvar_id() doesn't know about {}", $name);
}
}
)
);
crate::declare_id!("Sysvar1111111111111111111111111111111111111");
pub trait SysvarId {
fn check_id(pubkey: &Pubkey) -> bool;
}
pub trait Sysvar:
SysvarId + Default + Sized + serde::Serialize + serde::de::DeserializeOwned
{
fn biggest() -> Self {
Self::default()
}
fn size_of() -> usize {
bincode::serialized_size(&Self::biggest()).unwrap() as usize
}
fn from_account(account: &Account) -> Option<Self> {
bincode::deserialize(&account.data).ok()
}
fn to_account(&self, account: &mut Account) -> Option<()> {
bincode::serialize_into(&mut account.data[..], self).ok()
}
fn from_account_info(account: &AccountInfo) -> Option<Self> {
bincode::deserialize(&account.data).ok()
}
fn to_account_info(&self, account: &mut AccountInfo) -> Option<()> {
bincode::serialize_into(&mut account.data[..], self).ok()
}
fn from_keyed_account(account: &KeyedAccount) -> Result<Self, InstructionError> {
if !Self::check_id(account.unsigned_key()) {
return Err(InstructionError::InvalidArgument);
}
Self::from_account(account.account).ok_or(InstructionError::InvalidArgument)
}
fn create_account(&self, lamports: u64) -> Account {
let mut account = Account::new(lamports, Self::size_of(), &id());
self.to_account(&mut account).unwrap();
account
}
}