89 lines
2.7 KiB
Rust
89 lines
2.7 KiB
Rust
//! config for staking
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//! carries variables that the stake program cares about
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use bincode::{deserialize, serialized_size};
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use serde_derive::{Deserialize, Serialize};
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use solana_config_program::{create_config_account, get_config_data, ConfigState};
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use solana_sdk::{
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account::{Account, KeyedAccount},
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genesis_config::GenesisConfig,
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instruction::InstructionError,
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};
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// stake config ID
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solana_sdk::declare_id!("StakeConfig11111111111111111111111111111111");
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// means that no more than RATE of current effective stake may be added or subtracted per
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// epoch
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pub const DEFAULT_WARMUP_COOLDOWN_RATE: f64 = 0.25;
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pub const DEFAULT_SLASH_PENALTY: u8 = ((5 * std::u8::MAX as usize) / 100) as u8;
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#[derive(Serialize, Deserialize, Debug, PartialEq, Clone, Copy)]
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pub struct Config {
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/// how much stake we can activate/deactivate per-epoch as a fraction of currently effective stake
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pub warmup_cooldown_rate: f64,
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/// percentage of stake lost when slash, expressed as a portion of std::u8::MAX
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pub slash_penalty: u8,
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}
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impl Config {
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pub fn from(account: &Account) -> Option<Self> {
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get_config_data(&account.data)
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.ok()
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.and_then(|data| deserialize(data).ok())
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}
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}
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impl Default for Config {
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fn default() -> Self {
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Self {
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warmup_cooldown_rate: DEFAULT_WARMUP_COOLDOWN_RATE,
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slash_penalty: DEFAULT_SLASH_PENALTY,
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}
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}
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}
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impl ConfigState for Config {
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fn max_space() -> u64 {
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serialized_size(&Config::default()).unwrap()
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}
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}
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pub fn add_genesis_account(genesis_config: &mut GenesisConfig) -> u64 {
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let mut account = create_config_account(vec![], &Config::default(), 0);
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let lamports = genesis_config.rent.minimum_balance(account.data.len());
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account.lamports = lamports.max(1);
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genesis_config.add_account(id(), account);
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lamports
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}
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pub fn create_account(lamports: u64, config: &Config) -> Account {
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create_config_account(vec![], config, lamports)
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}
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pub fn from_keyed_account(account: &KeyedAccount) -> Result<Config, InstructionError> {
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if !check_id(account.unsigned_key()) {
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return Err(InstructionError::InvalidArgument);
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}
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Config::from(&*account.try_account_ref()?).ok_or(InstructionError::InvalidArgument)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use solana_sdk::pubkey::Pubkey;
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use std::cell::RefCell;
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#[test]
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fn test() {
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let account = RefCell::new(create_account(0, &Config::default()));
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assert_eq!(Config::from(&account.borrow()), Some(Config::default()));
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assert_eq!(
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from_keyed_account(&KeyedAccount::new(&Pubkey::default(), false, &account)),
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Err(InstructionError::InvalidArgument)
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);
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}
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}
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