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sysvar trait (#6667)

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* sysvar trait

* get the new guy in on it
This commit is contained in:
Rob Walker
2019-11-04 12:31:24 -08:00
committed by GitHub
parent b9b535c30f
commit efe260f12e
18 changed files with 183 additions and 303 deletions
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39
sdk/src/sysvar/stake_history.rs
View File

@@ -2,10 +2,9 @@
//!
//! this account carries history about stake activations and de-activations
//!
use crate::account_info::AccountInfo;
pub use crate::clock::Epoch;
use crate::{account::Account, sysvar};
use bincode::serialized_size;
use crate::{account::Account, sysvar::Sysvar};
use std::ops::Deref;
const ID: [u8; 32] = [
@@ -13,7 +12,11 @@ const ID: [u8; 32] = [
87, 184, 86, 108, 197, 55, 95, 244, 0, 0, 0,
];
crate::solana_sysvar_id!(ID, "SysvarStakeHistory1111111111111111111111111");
crate::solana_sysvar_id!(
ID,
"SysvarStakeHistory1111111111111111111111111",
StakeHistory
);
pub const MAX_STAKE_HISTORY: usize = 512; // it should never take as many as 512 epochs to warm up or cool down
@@ -28,27 +31,13 @@ pub struct StakeHistoryEntry {
#[derive(Debug, Serialize, Deserialize, PartialEq, Default, Clone)]
pub struct StakeHistory(Vec<(Epoch, StakeHistoryEntry)>);
impl StakeHistory {
pub fn from_account(account: &Account) -> Option<Self> {
account.deserialize_data().ok()
}
pub fn to_account(&self, account: &mut Account) -> Option<()> {
account.serialize_data(self).ok()
}
pub fn from_account_info(account: &AccountInfo) -> Option<Self> {
account.deserialize_data().ok()
}
pub fn to_account_info(&self, account: &mut AccountInfo) -> Option<()> {
account.serialize_data(self).ok()
}
pub fn size_of() -> usize {
serialized_size(&StakeHistory(vec![
(0, StakeHistoryEntry::default());
MAX_STAKE_HISTORY
]))
.unwrap() as usize
impl Sysvar for StakeHistory {
fn biggest() -> Self {
StakeHistory(vec![(0, StakeHistoryEntry::default()); MAX_STAKE_HISTORY])
}
}
impl StakeHistory {
#[allow(clippy::trivially_copy_pass_by_ref)]
pub fn get(&self, epoch: &Epoch) -> Option<&StakeHistoryEntry> {
self.binary_search_by(|probe| epoch.cmp(&probe.0))
@@ -73,9 +62,7 @@ impl Deref for StakeHistory {
}
pub fn create_account(lamports: u64, stake_history: &StakeHistory) -> Account {
let mut account = Account::new(lamports, StakeHistory::size_of(), &sysvar::id());
stake_history.to_account(&mut account).unwrap();
account
stake_history.create_account(lamports)
}
use crate::account::KeyedAccount;