test_existing_authority_refund()

Documentation for tests/amsterdam/eip8038_state_access_gas_cost_increase/test_eip_mainnet.py::test_existing_authority_refund@2867859a.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip8038_state_access_gas_cost_increase/test_eip_mainnet.py::test_existing_authority_refund --fork Amsterdam

Re-authorizing an already-delegated authority applies the existing-authority refund and re-points the delegation; the tx succeeds with the new designation installed.

Source code in tests/amsterdam/eip8038_state_access_gas_cost_increase/test_eip_mainnet.py

@EIPChecklist.GasCostChanges.Test.GasUpdatesMeasurement()
def test_existing_authority_refund(
    state_test: StateTestFiller,
    pre: Alloc,
) -> None:
    """
    Re-authorizing an already-delegated authority applies the
    existing-authority refund and re-points the delegation; the tx
    succeeds with the new designation installed.
    """
    old_target = pre.deploy_contract(code=Op.STOP)
    new_target = pre.deploy_contract(code=Op.STOP)

    # Authority already carries a delegation, so the new authorization
    # triggers REFUND_AUTH_PER_EXISTING_ACCOUNT.
    auth_signer = pre.fund_eoa(delegation=old_target)

    authorization_list = [
        AuthorizationTuple(
            address=new_target,
            nonce=1,
            signer=auth_signer,
        ),
    ]

    tx = Transaction(
        to=auth_signer,
        gas_limit=1_000_000,
        authorization_list=authorization_list,
        sender=pre.fund_eoa(),
    )

    post = {
        auth_signer: Account(
            nonce=2,
            code=Spec7702.delegation_designation(new_target),
        ),
    }
    state_test(pre=pre, post=post, tx=tx)

Parametrized Test Cases

This test generates 1 parametrized test case across 1 fork.