test_delegation_clearing_and_set_preserves_storage()

Documentation for tests/prague/eip7702_set_code_tx/test_set_code_txs.py::test_delegation_clearing_and_set_preserves_storage@622620d8.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/prague/eip7702_set_code_tx/test_set_code_txs.py::test_delegation_clearing_and_set_preserves_storage --fork Amsterdam

Test that clearing a pre-state delegation and setting a new one in the same authorization list keeps the authority's storage intact and readable.

Source code in tests/prague/eip7702_set_code_tx/test_set_code_txs.py

def test_delegation_clearing_and_set_preserves_storage(
    state_test: StateTestFiller,
    pre: Alloc,
) -> None:
    """
    Test that clearing a pre-state delegation and setting a new one in the
    same authorization list keeps the authority's storage intact and
    readable.
    """
    slot_preserved = 1
    slot_read_back = 2
    slot_marker = 3

    auth_signer = pre.fund_eoa(
        0,
        delegation=pre.deploy_contract(Op.STOP),
        storage=Storage({slot_preserved: 0x2A}),  # type: ignore[dict-item]
    )
    reader = pre.deploy_contract(
        Op.SSTORE(slot_read_back, Op.SLOAD(slot_preserved))
        # The write to an untouched slot forces the storage root to be
        # recomputed from the whole slot set.
        + Op.SSTORE(slot_marker, 1)
        + Op.STOP
    )

    tx = Transaction(
        to=auth_signer,
        value=0,
        authorization_list=[
            AuthorizationTuple(
                address=Spec.RESET_DELEGATION_ADDRESS,  # Reset
                nonce=auth_signer.nonce,
                signer=auth_signer,
            ),
            AuthorizationTuple(
                address=reader,
                nonce=auth_signer.nonce + 1,
                signer=auth_signer,
            ),
        ],
        sender=pre.fund_eoa(),
    )

    state_test(
        env=Environment(),
        pre=pre,
        tx=tx,
        post={
            auth_signer: Account(
                nonce=auth_signer.nonce + 2,
                code=Spec.delegation_designation(reader),
                storage={
                    slot_preserved: 0x2A,
                    slot_read_back: 0x2A,
                    slot_marker: 1,
                },
            ),
        },
    )

Parametrized Test Cases

This test generates 1 parametrized test case across 3 forks.