test_block_gas_used_mixed_txs()

Documentation for tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_block_2d_gas_accounting.py::test_block_gas_used_mixed_txs@a9abd46e.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_block_2d_gas_accounting.py::test_block_gas_used_mixed_txs --fork Amsterdam

Verify block.gas_used with mixed STOP and SSTORE transactions.

STOP txs contribute only regular gas; SSTORE txs contribute both. The interleaved variant alternates SSTORE/STOP to test that non-contiguous state gas contributions accumulate correctly.

Source code in tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_block_2d_gas_accounting.py

@pytest.mark.parametrize(
    "num_stop,num_sstore,interleaved",
    [
        pytest.param(2, 3, False, id="grouped"),
        pytest.param(10, 10, True, id="interleaved"),
    ],
)
@pytest.mark.valid_from("EIP8037")
def test_block_gas_used_mixed_txs(
    blockchain_test: BlockchainTestFiller,
    pre: Alloc,
    fork: Fork,
    num_stop: int,
    num_sstore: int,
    interleaved: bool,
) -> None:
    """
    Verify block.gas_used with mixed STOP and SSTORE transactions.

    STOP txs contribute only regular gas; SSTORE txs contribute both.
    The interleaved variant alternates SSTORE/STOP to test that
    non-contiguous state gas contributions accumulate correctly.
    """
    intrinsic_gas = fork.transaction_intrinsic_cost_calculator()()
    tx_regular_sstore, tx_state_sstore = sstore_tx_gas(fork)

    block_regular = num_stop * intrinsic_gas + num_sstore * tx_regular_sstore
    block_state = num_sstore * tx_state_sstore
    expected = max(block_regular, block_state)

    txs_sstore, post = sstore_txs(pre, fork, num_sstore)
    txs_stop = stop_txs(pre, fork, num_stop)

    if interleaved:
        txs = []
        for i in range(max(num_sstore, num_stop)):
            if i < num_sstore:
                txs.append(txs_sstore[i])
            if i < num_stop:
                txs.append(txs_stop[i])
    else:
        txs = txs_stop + txs_sstore

    blockchain_test(
        pre=pre,
        blocks=[
            Block(
                txs=txs,
                header_verify=Header(gas_used=expected),
            )
        ],
        post=post,
    )

Parametrized Test Cases

This test generates 2 parametrized test cases across 1 fork.