Fix flaky test_transaction_result_does_not_affect_bankhash (#3916)

ledger/src/blockstore_processor.rs

@@ -2353,7 +2353,8 @@ pub mod tests {
         crate::{
             blockstore_options::{AccessType, BlockstoreOptions},
             genesis_utils::{
-                create_genesis_config, create_genesis_config_with_leader, GenesisConfigInfo,
+                create_genesis_config, create_genesis_config_with_leader,
+                create_genesis_config_with_mint_keypair, GenesisConfigInfo,
             },
         },
         assert_matches::assert_matches,
@@ -2381,6 +2382,7 @@ pub mod tests {
             pubkey::Pubkey,
             rent_debits::RentDebits,
             signature::{Keypair, Signer},
+            signer::SeedDerivable,
             system_instruction::SystemError,
             system_transaction,
             transaction::{Transaction, TransactionError},
@@ -2397,6 +2399,7 @@ pub mod tests {
             vote_transaction,
         },
         std::{collections::BTreeSet, sync::RwLock},
+        test_case::test_case,
         trees::tr,
     };
 
@@ -3459,14 +3462,19 @@ pub mod tests {
         }
     }
 
-    #[test]
-    fn test_transaction_result_does_not_affect_bankhash() {
+    #[test_case(true; "rent_collected")]
+    #[test_case(false; "rent_not_collected")]
+    fn test_transaction_result_does_not_affect_bankhash(fee_payer_in_rent_partition: bool) {
         solana_logger::setup();
         let GenesisConfigInfo {
             genesis_config,
             mint_keypair,
             ..
-        } = create_genesis_config(1000);
+        } = if fee_payer_in_rent_partition {
+            create_genesis_config(1000)
+        } else {
+            create_genesis_config_with_mint_keypair(Keypair::from_seed(&[1u8; 32]).unwrap(), 1000)
+        };
 
         fn get_instruction_errors() -> Vec<InstructionError> {
             vec![
@@ -3532,7 +3540,7 @@ pub mod tests {
             Ok(())
         });
 
-        let mock_program_id = solana_sdk::pubkey::new_rand();
+        let mock_program_id = Pubkey::new_unique();
 
         let (bank, _bank_forks) = Bank::new_with_mockup_builtin_for_tests(
             &genesis_config,
@@ -3596,7 +3604,8 @@ pub mod tests {
 
             let entry = next_entry(&bank.last_blockhash(), 1, vec![tx]);
             let bank = Arc::new(bank);
-            let _result = process_entries_for_tests_without_scheduler(&bank, vec![entry]);
+            let result = process_entries_for_tests_without_scheduler(&bank, vec![entry]);
+            assert!(result.is_ok()); // No failing transaction error - only instruction errors
             bank.freeze();
             let bank_details = SlotDetails::new_from_bank(&bank, true).unwrap();
 
@@ -3613,8 +3622,8 @@ pub mod tests {
                     .unwrap()
                     .last_blockhash
             );
-            // ... but should affect bank hash
-            assert_ne!(ok_bank_details, bank_details);
+            // AND should not affect bankhash IF the rent is collected during freeze.
+            assert_eq!(ok_bank_details == bank_details, fee_payer_in_rent_partition);
             // Different types of transaction failure should not affect bank hash
             if let Some(prev_bank_details) = &err_bank_details {
                 assert_eq!(

ledger/src/genesis_utils.rs

@@ -1,13 +1,29 @@
 pub use solana_runtime::genesis_utils::{
     bootstrap_validator_stake_lamports, create_genesis_config_with_leader, GenesisConfigInfo,
 };
+use {
+    solana_runtime::genesis_utils::create_genesis_config_with_leader_with_mint_keypair,
+    solana_sdk::{pubkey::Pubkey, signature::Keypair},
+};
 
 // same as genesis_config::create_genesis_config, but with bootstrap_validator staking logic
 //  for the core crate tests
 pub fn create_genesis_config(mint_lamports: u64) -> GenesisConfigInfo {
     create_genesis_config_with_leader(
         mint_lamports,
-        &solana_sdk::pubkey::new_rand(),
+        &Pubkey::new_unique(),
+        bootstrap_validator_stake_lamports(),
+    )
+}
+
+pub fn create_genesis_config_with_mint_keypair(
+    mint_keypair: Keypair,
+    mint_lamports: u64,
+) -> GenesisConfigInfo {
+    create_genesis_config_with_leader_with_mint_keypair(
+        mint_keypair,
+        mint_lamports,
+        &Pubkey::new_unique(),
         bootstrap_validator_stake_lamports(),
     )
 }

runtime/src/genesis_utils.rs

@@ -10,6 +10,7 @@ use {
         pubkey::Pubkey,
         rent::Rent,
         signature::{Keypair, Signer},
+        signer::SeedDerivable,
         stake::state::StakeStateV2,
         system_program,
     },
@@ -169,15 +170,40 @@ pub fn create_genesis_config_with_leader(
     validator_pubkey: &Pubkey,
     validator_stake_lamports: u64,
 ) -> GenesisConfigInfo {
-    let mint_keypair = Keypair::new();
-    let voting_keypair = Keypair::new();
+    // Use deterministic keypair so we don't get confused by randomness in tests
+    let mint_keypair = Keypair::from_seed(&[
+        0, 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,
+    ])
+    .unwrap();
+
+    create_genesis_config_with_leader_with_mint_keypair(
+        mint_keypair,
+        mint_lamports,
+        validator_pubkey,
+        validator_stake_lamports,
+    )
+}
+
+pub fn create_genesis_config_with_leader_with_mint_keypair(
+    mint_keypair: Keypair,
+    mint_lamports: u64,
+    validator_pubkey: &Pubkey,
+    validator_stake_lamports: u64,
+) -> GenesisConfigInfo {
+    // Use deterministic keypair so we don't get confused by randomness in tests
+    let voting_keypair = Keypair::from_seed(&[
+        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,
+    ])
+    .unwrap();
 
     let genesis_config = create_genesis_config_with_leader_ex(
         mint_lamports,
         &mint_keypair.pubkey(),
         validator_pubkey,
         &voting_keypair.pubkey(),
-        &solana_sdk::pubkey::new_rand(),
+        &Pubkey::new_unique(),
         validator_stake_lamports,
         VALIDATOR_LAMPORTS,
         FeeRateGovernor::new(0, 0), // most tests can't handle transaction fees