test_call_insufficient_balance_returns_reservoir()

Documentation for tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_call.py::test_call_insufficient_balance_returns_reservoir@c74f1a67.

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_insufficient_balance_returns_reservoir --fork Amsterdam

Test CALL with insufficient balance returns the reservoir to parent.

A value-bearing CALL to an existing account fails the balance check before entering the child frame; gas_left and state_gas_left are returned to the parent, which can still use the reservoir for a later SSTORE. The new-account variant (where NEW_ACCOUNT is charged then refilled on the same failure) is pinned by test_call_insufficient_balance_refunds_new_account_state_gas.

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

@pytest.mark.valid_from("EIP8037")
def test_call_insufficient_balance_returns_reservoir(
    state_test: StateTestFiller,
    pre: Alloc,
    fork: Fork,
) -> None:
    """
    Test CALL with insufficient balance returns the reservoir to parent.

    A value-bearing CALL to an existing account fails the balance check
    before entering the child frame; gas_left and state_gas_left are
    returned to the parent, which can still use the reservoir for a
    later SSTORE. The new-account variant (where NEW_ACCOUNT is charged
    then refilled on the same failure) is pinned by
    test_call_insufficient_balance_refunds_new_account_state_gas.
    """
    sstore_state_gas = Op.SSTORE(new_value=1).state_cost(fork)

    target = pre.deploy_contract(code=Op.STOP)
    reservoir = sstore_state_gas

    storage = Storage()
    contract = pre.deploy_contract(
        code=(
            # CALL with 1 wei — fails (contract has 0 balance)
            Op.SSTORE(
                storage.store_next(0, "call_fails"),
                Op.CALL(100_000, target, 1, 0, 0, 0, 0),
            )
            # Reservoir should be returned — SSTORE still works
            + Op.SSTORE(storage.store_next(1, "sstore_after"), 1)
        ),
    )

    tx = Transaction(
        to=contract,
        state_gas_reservoir=reservoir,
        sender=pre.fund_eoa(),
    )

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

Parametrized Test Cases

This test generates 1 parametrized test case across 1 fork.