solana_sdk/
nonce_account.rs

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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
//! Functions related to nonce accounts.

use {
    crate::{
        account::{AccountSharedData, ReadableAccount},
        account_utils::StateMut,
        hash::Hash,
        nonce::{
            state::{Data, Versions},
            State,
        },
    },
    std::cell::RefCell,
};

pub fn create_account(lamports: u64) -> RefCell<AccountSharedData> {
    RefCell::new(
        AccountSharedData::new_data_with_space(
            lamports,
            &Versions::new(State::Uninitialized),
            State::size(),
            &crate::system_program::id(),
        )
        .expect("nonce_account"),
    )
}

/// Checks if the recent_blockhash field in Transaction verifies, and returns
/// nonce account data if so.
pub fn verify_nonce_account(
    account: &AccountSharedData,
    recent_blockhash: &Hash, // Transaction.message.recent_blockhash
) -> Option<Data> {
    (account.owner() == &crate::system_program::id())
        .then(|| {
            StateMut::<Versions>::state(account)
                .ok()?
                .verify_recent_blockhash(recent_blockhash)
                .cloned()
        })
        .flatten()
}

pub fn lamports_per_signature_of(account: &AccountSharedData) -> Option<u64> {
    match StateMut::<Versions>::state(account).ok()?.state() {
        State::Initialized(data) => Some(data.fee_calculator.lamports_per_signature),
        State::Uninitialized => None,
    }
}

#[cfg(test)]
mod tests {
    use {
        super::*,
        crate::{
            fee_calculator::FeeCalculator,
            nonce::state::{Data, DurableNonce},
            pubkey::Pubkey,
            system_program,
        },
    };

    #[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(State::Uninitialized),
            State::size(),
            &program_id,
        )
        .expect("nonce_account");
        assert_eq!(verify_nonce_account(&account, &Hash::default()), None);
    }

    fn new_nonce_account(versions: Versions) -> AccountSharedData {
        AccountSharedData::new_data(
            1_000_000,             // lamports
            &versions,             // state
            &system_program::id(), // owner
        )
        .unwrap()
    }

    #[test]
    fn test_verify_nonce_account() {
        let blockhash = Hash::from([171; 32]);
        let versions = Versions::Legacy(Box::new(State::Uninitialized));
        let account = new_nonce_account(versions);
        assert_eq!(verify_nonce_account(&account, &blockhash), None);
        assert_eq!(verify_nonce_account(&account, &Hash::default()), None);
        let versions = Versions::Current(Box::new(State::Uninitialized));
        let account = new_nonce_account(versions);
        assert_eq!(verify_nonce_account(&account, &blockhash), None);
        assert_eq!(verify_nonce_account(&account, &Hash::default()), None);
        let durable_nonce = DurableNonce::from_blockhash(&blockhash);
        let data = Data {
            authority: Pubkey::new_unique(),
            durable_nonce,
            fee_calculator: FeeCalculator {
                lamports_per_signature: 2718,
            },
        };
        let versions = Versions::Legacy(Box::new(State::Initialized(data.clone())));
        let account = new_nonce_account(versions);
        assert_eq!(verify_nonce_account(&account, &blockhash), None);
        assert_eq!(verify_nonce_account(&account, &Hash::default()), None);
        assert_eq!(verify_nonce_account(&account, &data.blockhash()), None);
        assert_eq!(
            verify_nonce_account(&account, durable_nonce.as_hash()),
            None
        );
        let durable_nonce = DurableNonce::from_blockhash(durable_nonce.as_hash());
        assert_ne!(data.durable_nonce, durable_nonce);
        let data = Data {
            durable_nonce,
            ..data
        };
        let versions = Versions::Current(Box::new(State::Initialized(data.clone())));
        let account = new_nonce_account(versions);
        assert_eq!(verify_nonce_account(&account, &blockhash), None);
        assert_eq!(verify_nonce_account(&account, &Hash::default()), None);
        assert_eq!(
            verify_nonce_account(&account, &data.blockhash()),
            Some(data.clone())
        );
        assert_eq!(
            verify_nonce_account(&account, durable_nonce.as_hash()),
            Some(data)
        );
    }
}