test_call_stack_depth_returns_reservoir()

Documentation for tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_call.py::test_call_stack_depth_returns_reservoir@5c024cbb.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_call.py::test_call_stack_depth_returns_reservoir --fork Amsterdam

Test CALL at stack depth limit returns reservoir.

When a CALL exceeds the 1024 stack depth limit, the call fails and gas and state gas reservoir are returned. The parent can still use the reservoir for state operations.

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

@pytest.mark.valid_from("EIP8037")
def test_call_stack_depth_returns_reservoir(
    state_test: StateTestFiller,
    pre: Alloc,
    fork: Fork,
) -> None:
    """
    Test CALL at stack depth limit returns reservoir.

    When a CALL exceeds the 1024 stack depth limit, the call fails
    and gas and state gas reservoir are returned. The parent can still
    use the reservoir for state operations.
    """
    sstore_state_gas = Op.SSTORE(new_value=1).state_cost(fork)

    # Contract that recursively calls itself until depth exhausted,
    # then does an SSTORE using the reservoir
    storage = Storage()
    recursive = pre.deploy_contract(
        code=(
            # Try recursive call (will eventually hit depth 1024)
            Op.POP(Op.CALL(Op.GAS, Op.ADDRESS, 0, 0, 0, 0, 0))
            # After recursion unwinds, only the outermost frame
            # reaches this SSTORE
            + Op.SSTORE(storage.store_next(1, "after_recursion"), 1)
        ),
    )

    tx = Transaction(
        to=recursive,
        state_gas_reservoir=sstore_state_gas,
        sender=pre.fund_eoa(),
    )

    post = {recursive: Account(storage=storage)}
    state_test(pre=pre, post=post, tx=tx)

Parametrized Test Cases

This test generates 1 parametrized test case across 1 fork.