1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
use crate::{
account::AccountSharedData,
account_utils::StateMut,
fee_calculator::FeeCalculator,
hash::Hash,
nonce::{state::Versions, State},
};
use std::cell::RefCell;
pub fn create_account(lamports: u64) -> RefCell<AccountSharedData> {
RefCell::new(
AccountSharedData::new_data_with_space(
lamports,
&Versions::new_current(State::Uninitialized),
State::size(),
&crate::system_program::id(),
)
.expect("nonce_account"),
)
}
pub fn verify_nonce_account(acc: &AccountSharedData, hash: &Hash) -> bool {
if acc.owner != crate::system_program::id() {
return false;
}
match StateMut::<Versions>::state(acc).map(|v| v.convert_to_current()) {
Ok(State::Initialized(ref data)) => *hash == data.blockhash,
_ => false,
}
}
pub fn fee_calculator_of(account: &AccountSharedData) -> Option<FeeCalculator> {
let state = StateMut::<Versions>::state(account)
.ok()?
.convert_to_current();
match state {
State::Initialized(data) => Some(data.fee_calculator),
_ => None,
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::pubkey::Pubkey;
#[test]
fn test_verify_bad_account_owner_fails() {
let program_id = Pubkey::new_unique();
assert_ne!(program_id, crate::system_program::id());
let account = AccountSharedData::new_data_with_space(
42,
&Versions::new_current(State::Uninitialized),
State::size(),
&program_id,
)
.expect("nonce_account");
assert!(!verify_nonce_account(&account, &Hash::default()));
}
}