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

use crate::bank::Bank;
use solana_sdk::transaction::{Result, Transaction};

// Represents the results of trying to lock a set of accounts
pub struct TransactionBatch<'a, 'b> {
    lock_results: Vec<Result<()>>,
    bank: &'a Bank,
    transactions: &'b [Transaction],
    iteration_order: Option<Vec<usize>>,
    pub(crate) needs_unlock: bool,
}

impl<'a, 'b> TransactionBatch<'a, 'b> {
    pub fn new(
        lock_results: Vec<Result<()>>,
        bank: &'a Bank,
        transactions: &'b [Transaction],
        iteration_order: Option<Vec<usize>>,
    ) -> Self {
        assert_eq!(lock_results.len(), transactions.len());
        if let Some(iteration_order) = &iteration_order {
            assert_eq!(transactions.len(), iteration_order.len());
        }
        Self {
            lock_results,
            bank,
            transactions,
            iteration_order,
            needs_unlock: true,
        }
    }

    pub fn lock_results(&self) -> &Vec<Result<()>> {
        &self.lock_results
    }

    pub fn transactions(&self) -> &[Transaction] {
        self.transactions
    }

    pub fn iteration_order(&self) -> Option<&[usize]> {
        self.iteration_order.as_deref()
    }

    pub fn iteration_order_vec(&self) -> Option<Vec<usize>> {
        self.iteration_order.clone()
    }

    pub fn bank(&self) -> &Bank {
        self.bank
    }
}

// Unlock all locked accounts in destructor.
impl<'a, 'b> Drop for TransactionBatch<'a, 'b> {
    fn drop(&mut self) {
        self.bank.unlock_accounts(self)
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::genesis_utils::{create_genesis_config_with_leader, GenesisConfigInfo};
    use solana_sdk::{pubkey::Pubkey, signature::Keypair, system_transaction};

    #[test]
    fn test_transaction_batch() {
        let (bank, txs) = setup();

        // Test getting locked accounts
        let batch = bank.prepare_batch(&txs, None);

        // Grab locks
        assert!(batch.lock_results().iter().all(|x| x.is_ok()));

        // Trying to grab locks again should fail
        let batch2 = bank.prepare_batch(&txs, None);
        assert!(batch2.lock_results().iter().all(|x| x.is_err()));

        // Drop the first set of locks
        drop(batch);

        // Now grabbing locks should work again
        let batch2 = bank.prepare_batch(&txs, None);
        assert!(batch2.lock_results().iter().all(|x| x.is_ok()));
    }

    #[test]
    fn test_simulation_batch() {
        let (bank, txs) = setup();

        // Prepare batch without locks
        let batch = bank.prepare_simulation_batch(&txs);
        assert!(batch.lock_results().iter().all(|x| x.is_ok()));

        // Grab locks
        let batch2 = bank.prepare_batch(&txs, None);
        assert!(batch2.lock_results().iter().all(|x| x.is_ok()));

        // Prepare another batch without locks
        let batch3 = bank.prepare_simulation_batch(&txs);
        assert!(batch3.lock_results().iter().all(|x| x.is_ok()));
    }

    fn setup() -> (Bank, Vec<Transaction>) {
        let dummy_leader_pubkey = Pubkey::new_rand();
        let GenesisConfigInfo {
            genesis_config,
            mint_keypair,
            ..
        } = create_genesis_config_with_leader(500, &dummy_leader_pubkey, 100);
        let bank = Bank::new(&genesis_config);

        let pubkey = Pubkey::new_rand();
        let keypair2 = Keypair::new();
        let pubkey2 = Pubkey::new_rand();

        let txs = vec![
            system_transaction::transfer(&mint_keypair, &pubkey, 1, genesis_config.hash()),
            system_transaction::transfer(&keypair2, &pubkey2, 1, genesis_config.hash()),
        ];

        (bank, txs)
    }
}