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test_dynamic_create2_selfdestruct_collision_two_different_transactions()

Documentation for tests/cancun/eip6780_selfdestruct/test_dynamic_create2_selfdestruct_collision.py::test_dynamic_create2_selfdestruct_collision_two_different_transactions@83970623.

Generate fixtures for these test cases for Prague with:

fill -v tests/cancun/eip6780_selfdestruct/test_dynamic_create2_selfdestruct_collision.py::test_dynamic_create2_selfdestruct_collision_two_different_transactions --fork Prague

Dynamic Create2->Suicide->Create2 collision scenario.

Perform a CREATE2, make sure that the initcode sets at least a couple of storage keys, then on a different call, in the same tx, perform a self-destruct. Then: a) on the same tx, attempt to recreate the contract 1) and create2 contract already in the state 2) and create2 contract is not in the state b) on a different tx, attempt to recreate the contract <=== Covered in this test Perform a CREATE2, make sure that the initcode sets at least a couple of storage keys, then in a different tx, perform a self-destruct. Then: a) on the same tx, attempt to recreate the contract b) on a different tx, attempt to recreate the contract Verify that the test case described in https://wiki.hyperledger.org/pages/viewpage.action?pageId=117440824 is covered

Source code in tests/cancun/eip6780_selfdestruct/test_dynamic_create2_selfdestruct_collision.py
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@pytest.mark.valid_from("Paris")
@pytest.mark.parametrize(
    "create2_dest_already_in_state",
    (True, False),
)
@pytest.mark.parametrize(
    "call_create2_contract_at_the_end",
    (True, False),
)
def test_dynamic_create2_selfdestruct_collision_two_different_transactions(
    env: Environment,
    fork: Fork,
    create2_dest_already_in_state: bool,
    call_create2_contract_at_the_end: bool,
    blockchain_test: BlockchainTestFiller,
):
    """
    Dynamic Create2->Suicide->Create2 collision scenario.

    Perform a CREATE2, make sure that the initcode sets at least a couple of storage keys,
    then on a different call, in the same tx, perform a self-destruct.
    Then:
        a) on the same tx, attempt to recreate the contract
            1) and create2 contract already in the state
            2) and create2 contract is not in the state
        b) on a different tx, attempt to recreate the contract <=== Covered in this test
    Perform a CREATE2, make sure that the initcode sets at least a couple of storage keys,
    then in a different tx, perform a self-destruct.
    Then:
        a) on the same tx, attempt to recreate the contract
        b) on a different tx, attempt to recreate the contract
    Verify that the test case described
    in https://wiki.hyperledger.org/pages/viewpage.action?pageId=117440824 is covered
    """
    # assert call_create2_contract_at_the_end, "invalid test"

    # Storage locations
    create2_constructor_worked = 1
    first_create2_result = 2
    second_create2_result = 3
    code_worked = 4

    # Pre-Existing Addresses
    address_zero = Address(0x00)
    address_to = Address(0x0600)
    address_to_second = Address(0x0700)
    address_code = Address(0x0601)
    address_create2_storage = Address(0x0512)
    sendall_destination = Address(0x03E8)

    # CREATE2 Initcode
    create2_salt = 1
    deploy_code = Op.SELFDESTRUCT(sendall_destination)
    initcode = Initcode(
        deploy_code=deploy_code,
        initcode_prefix=Op.SSTORE(create2_constructor_worked, 1)
        + Op.CALL(Op.GAS(), address_create2_storage, 0, 0, 0, 0, 0),
    )

    # Created addresses
    create2_address = compute_create2_address(address_code, create2_salt, initcode)
    call_address_in_the_end = create2_address if call_create2_contract_at_the_end else address_zero

    # Values
    pre_existing_create2_balance = 1
    first_create2_value = 10
    first_call_value = 100
    second_create2_value = 1000
    second_call_value = 10000

    pre = {
        address_to: Account(
            balance=100000000,
            nonce=0,
            code=Op.JUMPDEST()
            # Make a subcall that do CREATE2 and returns its the result
            + Op.CALLDATACOPY(0, 0, Op.CALLDATASIZE())
            + Op.CALL(100000, address_code, first_create2_value, 0, Op.CALLDATASIZE(), 0, 32)
            + Op.SSTORE(
                first_create2_result,
                Op.MLOAD(0),
            )
            # In case the create2 didn't work, flush account balance
            + Op.CALL(100000, address_code, 0, 0, 0, 0, 0)
            # Call to the created account to trigger selfdestruct
            + Op.CALL(100000, create2_address, first_call_value, 0, 0, 0, 0)
            + Op.SSTORE(code_worked, 1),
            storage={first_create2_result: 0xFF},
        ),
        address_to_second: Account(
            balance=100000000,
            nonce=0,
            code=Op.JUMPDEST()
            # Make a subcall that do CREATE2 collision and returns its address as the result
            + Op.CALLDATACOPY(0, 0, Op.CALLDATASIZE())
            + Op.CALL(100000, address_code, second_create2_value, 0, Op.CALLDATASIZE(), 0, 32)
            + Op.SSTORE(
                second_create2_result,
                Op.MLOAD(0),
            )
            # Call to the created account to trigger selfdestruct
            + Op.CALL(200000, call_address_in_the_end, second_call_value, 0, 0, 0, 0)
            + Op.SSTORE(code_worked, 1),
            storage={second_create2_result: 0xFF},
        ),
        address_code: Account(
            balance=0,
            nonce=0,
            code=Op.CALLDATACOPY(0, 0, Op.CALLDATASIZE())
            + Op.MSTORE(
                0,
                Op.CREATE2(Op.SELFBALANCE(), 0, Op.CALLDATASIZE(), create2_salt),
            )
            + Op.RETURN(0, 32),
            storage={},
        ),
        address_create2_storage: Account(
            balance=7000000000000000000,
            nonce=0,
            code=Op.SSTORE(1, 1),
            storage={},
        ),
        TestAddress: Account(
            balance=7000000000000000000,
            nonce=0,
            code="0x",
            storage={},
        ),
    }

    if create2_dest_already_in_state:
        # Create2 address already in the state, e.g. deployed in a previous block
        pre[create2_address] = Account(
            balance=pre_existing_create2_balance,
            nonce=1,
            code=deploy_code,
            storage={},
        )

    post: Dict[Address, Union[Account, object]] = {}

    # Create2 address only exists if it was pre-existing and after cancun
    post[create2_address] = (
        Account(balance=0, nonce=1, code=deploy_code, storage={create2_constructor_worked: 0x00})
        if create2_dest_already_in_state and fork >= Cancun
        else (
            Account.NONEXISTENT
            if call_create2_contract_at_the_end
            else Account(balance=1000, nonce=1, code=deploy_code)
        )
    )

    # after Cancun Create2 initcode is only executed if the contract did not already exist
    # and before it will always be executed as the first tx deletes the account
    post[address_create2_storage] = Account(
        storage={
            create2_constructor_worked: int(fork < Cancun or not create2_dest_already_in_state)
        }
    )

    # Entry code that makes the calls to the create2 contract creator
    post[address_to] = Account(
        storage={
            code_worked: 0x01,
            # First create2 only works if the contract was not preexisting
            first_create2_result: 0x00 if create2_dest_already_in_state else create2_address,
        }
    )
    post[address_to_second] = Account(
        storage={
            code_worked: 0x01,
            # Second create2 will not collide before Cancun as the first tx calls selfdestruct
            # After cancun it will collide only if create2_dest_already_in_state otherwise the
            # first tx creates and deletes it
            second_create2_result: (
                (0x00 if create2_dest_already_in_state else create2_address)
                if fork >= Cancun
                else create2_address
            ),
        }
    )

    # Calculate the destination account expected balance for the selfdestruct/sendall calls
    sendall_destination_balance = 0

    if create2_dest_already_in_state:
        sendall_destination_balance += pre_existing_create2_balance
        if fork >= Cancun:
            # first create2 fails, but first calls ok. the account is not removed on cancun
            # therefore with the second create2 it is not successful
            sendall_destination_balance += first_call_value
        else:
            # first create2 fails, first calls totally removes the account
            # in the second transaction second create2 is successful
            sendall_destination_balance += first_call_value
            if call_create2_contract_at_the_end:
                sendall_destination_balance += second_create2_value
    else:
        # if no account in the state, first create2 successful, first call successful and removes
        # because it is removed in the next transaction second create2 successful
        sendall_destination_balance = first_create2_value + first_call_value
        if call_create2_contract_at_the_end:
            sendall_destination_balance += second_create2_value

    if call_create2_contract_at_the_end:
        sendall_destination_balance += second_call_value

    post[sendall_destination] = Account(balance=sendall_destination_balance)

    nonce = count()

    blockchain_test(
        genesis_environment=Environment(),
        pre=pre,
        post=post,
        blocks=[
            Block(
                txs=[
                    Transaction(
                        ty=0x0,
                        chain_id=0x0,
                        nonce=next(nonce),
                        to=address_to,
                        gas_price=10,
                        protected=False,
                        data=initcode,
                        gas_limit=5000000,
                        value=0,
                    ),
                    Transaction(
                        ty=0x0,
                        chain_id=0x0,
                        nonce=next(nonce),
                        to=address_to_second,
                        gas_price=10,
                        protected=False,
                        data=initcode,
                        gas_limit=5000000,
                        value=0,
                    ),
                ]
            )
        ],
    )

Parametrized Test Cases

The interactive table below is also available as a standalone page.

Test ID (Abbreviated) call_create2_contract_at_the_end create2_dest_already_in_state
...fork_Paris-blockchain_test-call_create2_contract_at_the_end_True-create2_dest_already_in_state_True True True
...fork_Paris-blockchain_test-call_create2_contract_at_the_end_True-create2_dest_already_in_state_False True False
...fork_Paris-blockchain_test-call_create2_contract_at_the_end_False-create2_dest_already_in_state_True False True
...fork_Paris-blockchain_test-call_create2_contract_at_the_end_False-create2_dest_already_in_state_False False False
...fork_Shanghai-blockchain_test-call_create2_contract_at_the_end_True-create2_dest_already_in_state_True True True
...fork_Shanghai-blockchain_test-call_create2_contract_at_the_end_True-create2_dest_already_in_state_False True False
...fork_Shanghai-blockchain_test-call_create2_contract_at_the_end_False-create2_dest_already_in_state_True False True
...fork_Shanghai-blockchain_test-call_create2_contract_at_the_end_False-create2_dest_already_in_state_False False False
...fork_Cancun-blockchain_test-call_create2_contract_at_the_end_True-create2_dest_already_in_state_True True True
...fork_Cancun-blockchain_test-call_create2_contract_at_the_end_True-create2_dest_already_in_state_False True False
...fork_Cancun-blockchain_test-call_create2_contract_at_the_end_False-create2_dest_already_in_state_True False True
...fork_Cancun-blockchain_test-call_create2_contract_at_the_end_False-create2_dest_already_in_state_False False False
...fork_Prague-blockchain_test-call_create2_contract_at_the_end_True-create2_dest_already_in_state_True True True
...fork_Prague-blockchain_test-call_create2_contract_at_the_end_True-create2_dest_already_in_state_False True False
...fork_Prague-blockchain_test-call_create2_contract_at_the_end_False-create2_dest_already_in_state_True False True
...fork_Prague-blockchain_test-call_create2_contract_at_the_end_False-create2_dest_already_in_state_False False False
...fork_Osaka-blockchain_test-call_create2_contract_at_the_end_True-create2_dest_already_in_state_True True True
...fork_Osaka-blockchain_test-call_create2_contract_at_the_end_True-create2_dest_already_in_state_False True False
...fork_Osaka-blockchain_test-call_create2_contract_at_the_end_False-create2_dest_already_in_state_True False True
...fork_Osaka-blockchain_test-call_create2_contract_at_the_end_False-create2_dest_already_in_state_False False False