@Test
    void testTransactionIdEquals() {
        AccountId accountId = new AccountId(0, 0, 1000);
        Instant now = Instant.now();
        TransactionId txnId1 = TransactionId.withValidStart(accountId, now);
        TransactionId txnId2 = TransactionId.withValidStart(accountId, now);
        txnId2.setNonce(0);
        assertFalse(txnId1.equals(txnId2) && txnId1.hashCode() != txnId2.hashCode());
    }