solana_sdk/
feature.rs

1//! Methods for working with `Feature` accounts.
2
3use crate::account::{AccountSharedData, ReadableAccount, WritableAccount};
4pub use solana_program::feature::*;
5
6pub fn from_account<T: ReadableAccount>(account: &T) -> Option<Feature> {
7    if account.owner() != &id() {
8        None
9    } else {
10        bincode::deserialize(account.data()).ok()
11    }
12}
13
14pub fn to_account(feature: &Feature, account: &mut AccountSharedData) -> Option<()> {
15    bincode::serialize_into(account.data_as_mut_slice(), feature).ok()
16}
17
18pub fn create_account(feature: &Feature, lamports: u64) -> AccountSharedData {
19    let data_len = Feature::size_of().max(bincode::serialized_size(feature).unwrap() as usize);
20    let mut account = AccountSharedData::new(lamports, data_len, &id());
21    to_account(feature, &mut account).unwrap();
22    account
23}
24
25#[cfg(test)]
26mod test {
27    use super::*;
28
29    #[test]
30    fn feature_deserialize_none() {
31        let just_initialized = AccountSharedData::new(42, Feature::size_of(), &id());
32        assert_eq!(
33            from_account(&just_initialized),
34            Some(Feature { activated_at: None })
35        );
36    }
37}
solana_sdk/feature.rs

solana_sdk/
feature.rs
