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test_delegation_pointer_new_account_state_gas()

Documentation for tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_delegation_pointer.py::test_delegation_pointer_new_account_state_gas@2119b382.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_delegation_pointer.py::test_delegation_pointer_new_account_state_gas --fork Amsterdam

Test delegation pointer CALL to empty account charges new-account gas.

A contract CALLs with value to a non-existent address. When executed via a delegation pointer, the new-account state gas is charged identically to a direct call.

Source code in tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_delegation_pointer.py 
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@pytest.mark.valid_from("EIP8037")
def test_delegation_pointer_new_account_state_gas(
    state_test: StateTestFiller,
    pre: Alloc,
    fork: Fork,
) -> None:
    """
    Test delegation pointer CALL to empty account charges new-account gas.

    A contract CALLs with value to a non-existent address. When executed
    via a delegation pointer, the new-account state gas
    is charged identically to a direct call.
    """
    gas_costs = fork.gas_costs()
    new_account_state_gas = gas_costs.NEW_ACCOUNT

    target = pre.nonexistent_account()

    parent_storage = Storage()
    contract = pre.deploy_contract(
        code=(
            Op.SSTORE(
                parent_storage.store_next(1),
                Op.CALL(gas=100_000, address=target, value=1),
            )
        ),
        balance=1,
    )

    # EOA delegates to the contract
    delegator = pre.fund_eoa(delegation=contract, amount=1)

    # The authorization re-targets an already-delegated authority whose
    # nonce (1, from the delegation setup) no longer matches nonce=0, so
    # it is invalid and charges no top-frame state gas.
    authorization = AuthorizationTuple(
        address=contract,
        nonce=0,
        signer=delegator,
        creates_account=False,
        writes_delegation=False,
        first_write=False,
    )
    auth_state_gas = fork.transaction_top_frame_state_gas(
        authorizations=[authorization]
    )

    sender = pre.fund_eoa()
    tx = Transaction(
        to=delegator,
        state_gas_reservoir=auth_state_gas + new_account_state_gas,
        authorization_list=[authorization],
        sender=sender,
    )

    # CALL success stored in delegator's storage context
    post = {delegator: Account(storage=parent_storage)}
    state_test(pre=pre, post=post, tx=tx)

Parametrized Test Cases

This test generates 1 parametrized test case across 1 fork.