Transactiehelpers

Transacties verzenden

De TransactionHelpers trait biedt handige methoden voor het verzenden van instructies en het analyseren van resultaten.

Een enkele instructie verzenden

use litesvm_utils::{LiteSVM, Signer, TestHelpers, TransactionHelpers};
use solana_sdk::{native_token::LAMPORTS_PER_SOL, system_instruction};

#[test]
fn test_send_instruction() {
    let mut svm = LiteSVM::new();

    let alice = svm.create_funded_account(10 * LAMPORTS_PER_SOL).unwrap();
    let bob = svm.create_funded_account(0).unwrap();

    // Create a transfer instruction
    let transfer_ix = system_instruction::transfer(
        &alice.pubkey(),
        &bob.pubkey(),
        LAMPORTS_PER_SOL,
    );

    // Send and get result (returns Result<TransactionResult, TransactionError>)
    let result = svm.send_instruction(transfer_ix, &[&alice]).unwrap();

    // Assert it succeeded
    result.assert_success();
}

Meerdere instructies verzenden

use litesvm_utils::{LiteSVM, Signer, TestHelpers, TransactionHelpers};
use solana_sdk::{native_token::LAMPORTS_PER_SOL, system_instruction};

#[test]
fn test_send_multiple_instructions() {
    let mut svm = LiteSVM::new();

    let alice = svm.create_funded_account(10 * LAMPORTS_PER_SOL).unwrap();
    let bob = svm.create_funded_account(0).unwrap();
    let carol = svm.create_funded_account(0).unwrap();

    // Create multiple transfer instructions
    let instructions = vec![
        system_instruction::transfer(&alice.pubkey(), &bob.pubkey(), LAMPORTS_PER_SOL),
        system_instruction::transfer(&alice.pubkey(), &carol.pubkey(), LAMPORTS_PER_SOL),
    ];

    // Send all in one transaction
    let result = svm.send_instructions(&instructions, &[&alice]).unwrap();
    result.assert_success();
}

TransactionResult

De methoden send_instruction en send_instructions retourneren een TransactionResult die de transactiemetadata omhult met handige testutilities.

Succes bevestigen

use litesvm_utils::{LiteSVM, Signer, TestHelpers, TransactionHelpers};
use solana_sdk::{native_token::LAMPORTS_PER_SOL, system_instruction};

#[test]
fn test_assert_success() {
    let mut svm = LiteSVM::new();

    let alice = svm.create_funded_account(10 * LAMPORTS_PER_SOL).unwrap();
    let bob = svm.create_funded_account(0).unwrap();

    let ix = system_instruction::transfer(&alice.pubkey(), &bob.pubkey(), LAMPORTS_PER_SOL);
    let result = svm.send_instruction(ix, &[&alice]).unwrap();

    // Panics with detailed logs if the transaction failed
    result.assert_success();
}

assert_success() geeft een foutmelding met de volledige transactielogboeken als de transactie mislukt is, waardoor debuggen veel eenvoudiger wordt.

Fout bevestigen

use litesvm_utils::{LiteSVM, Signer, TestHelpers, TransactionHelpers};
use solana_sdk::{native_token::LAMPORTS_PER_SOL, system_instruction};

#[test]
fn test_assert_failure() {
    let mut svm = LiteSVM::new();

    let alice = svm.create_funded_account(1 * LAMPORTS_PER_SOL).unwrap();
    let bob = svm.create_funded_account(0).unwrap();

    // Try to transfer more than Alice has
    let ix = system_instruction::transfer(
        &alice.pubkey(),
        &bob.pubkey(),
        100 * LAMPORTS_PER_SOL, // Alice only has 1 SOL
    );
    let result = svm.send_instruction(ix, &[&alice]).unwrap();

    // This should fail
    result.assert_failure();
}

Specifieke fout bevestigen

use litesvm_utils::{LiteSVM, Signer, TestHelpers, TransactionHelpers};
use solana_sdk::{native_token::LAMPORTS_PER_SOL, system_instruction};

#[test]
fn test_assert_error() {
    let mut svm = LiteSVM::new();

    let alice = svm.create_funded_account(1 * LAMPORTS_PER_SOL).unwrap();
    let bob = svm.create_funded_account(0).unwrap();

    let ix = system_instruction::transfer(
        &alice.pubkey(),
        &bob.pubkey(),
        100 * LAMPORTS_PER_SOL,
    );
    let result = svm.send_instruction(ix, &[&alice]).unwrap();

    // Assert a specific error message is present
    result.assert_error("insufficient lamports");
}

Foutcode bevestigen

Voor aangepaste programmafouten kunt u de foutcode controleren:

// Assert a specific custom error code
result.assert_error_code(6000); // Custom error code from your program

Anchor-fout bevestigen

Voor Anchor-programma's kunt u foutnamen controleren:

// Assert an Anchor-specific error
result.assert_anchor_error("InsufficientFunds");

Transacties inspecteren

Transactielogboeken bekijken

use litesvm_utils::{LiteSVM, Signer, TestHelpers, TransactionHelpers};
use solana_sdk::{native_token::LAMPORTS_PER_SOL, system_instruction};

#[test]
fn test_check_logs() {
    let mut svm = LiteSVM::new();

    let alice = svm.create_funded_account(10 * LAMPORTS_PER_SOL).unwrap();
    let bob = svm.create_funded_account(0).unwrap();

    let ix = system_instruction::transfer(&alice.pubkey(), &bob.pubkey(), LAMPORTS_PER_SOL);
    let result = svm.send_instruction(ix, &[&alice]).unwrap();

    // Check if a specific message is in the logs
    if result.has_log("Transfer") {
        println!("Found transfer log!");
    }

    // Find a log matching a pattern
    if let Some(log) = result.find_log("Program") {
        println!("Found log: {}", log);
    }

    // Get all logs
    let logs = result.logs();
    for log in logs {
        println!("{}", log);
    }
}

Logboeken afdrukken voor foutopsporing

use litesvm_utils::{LiteSVM, Signer, TestHelpers, TransactionHelpers};
use solana_sdk::{native_token::LAMPORTS_PER_SOL, system_instruction};

#[test]
fn test_print_logs() {
    let mut svm = LiteSVM::new();

    let alice = svm.create_funded_account(10 * LAMPORTS_PER_SOL).unwrap();
    let bob = svm.create_funded_account(0).unwrap();

    let ix = system_instruction::transfer(&alice.pubkey(), &bob.pubkey(), LAMPORTS_PER_SOL);
    let result = svm.send_instruction(ix, &[&alice]).unwrap();

    // Print formatted logs for debugging
    result.print_logs();
}

Compute Units controleren

use litesvm_utils::{LiteSVM, Signer, TestHelpers, TransactionHelpers};
use solana_sdk::{native_token::LAMPORTS_PER_SOL, system_instruction};

#[test]
fn test_compute_units() {
    let mut svm = LiteSVM::new();

    let alice = svm.create_funded_account(10 * LAMPORTS_PER_SOL).unwrap();
    let bob = svm.create_funded_account(0).unwrap();

    let ix = system_instruction::transfer(&alice.pubkey(), &bob.pubkey(), LAMPORTS_PER_SOL);
    let result = svm.send_instruction(ix, &[&alice]).unwrap();

    let compute_units = result.compute_units();
    println!("Compute units consumed: {}", compute_units);

    // Assert compute usage is within expected bounds
    assert!(compute_units < 10_000, "Transaction used too many compute units");
}

Het monitoren van compute units is nuttig voor optimalisatie. Solana beperkt transacties tot 1,4 miljoen compute units, en een hoger gebruik kost meer.

Volledig voorbeeld

Hier is een uitgebreid voorbeeld dat transactiehulpfuncties demonstreert:

use litesvm_utils::{AssertionHelpers, LiteSVM, Signer, TestHelpers, TransactionHelpers};
use solana_sdk::{native_token::LAMPORTS_PER_SOL, system_instruction};

#[test]
fn test_transaction_workflow() {
    let mut svm = LiteSVM::new();

    // Setup accounts
    let alice = svm.create_funded_account(10 * LAMPORTS_PER_SOL).unwrap();
    let bob = svm.create_funded_account(0).unwrap();

    // Test successful transfer
    let transfer_ix = system_instruction::transfer(
        &alice.pubkey(),
        &bob.pubkey(),
        2 * LAMPORTS_PER_SOL,
    );

    let result = svm.send_instruction(transfer_ix, &[&alice]).unwrap();

    // Verify success
    result.assert_success();

    // Check compute usage
    let cu = result.compute_units();
    println!("Transfer used {} compute units", cu);

    // Verify balances
    svm.assert_sol_balance(&bob.pubkey(), 2 * LAMPORTS_PER_SOL);

    // Test expected failure
    let bad_transfer = system_instruction::transfer(
        &alice.pubkey(),
        &bob.pubkey(),
        100 * LAMPORTS_PER_SOL, // More than Alice has
    );

    let fail_result = svm.send_instruction(bad_transfer, &[&alice]).unwrap();
    fail_result.assert_failure();

    // Print logs for debugging
    fail_result.print_logs();

    println!("Transaction workflow test passed!");
}

Fouttypen

De TransactionError enum biedt gestructureerde foutinformatie:

Variant	Beschrijving
`ExecutionFailed(String)`	Uitvoering van transactie mislukt met bericht
`BuildError(String)`	Opbouwen van de transactie mislukt
`AssertionFailed(String)`	Een bewering over het resultaat is mislukt

Inhoudsopgave