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test_contract_creation()

Documentation for tests/cancun/eip1153_tstore/test_tstorage_create_contexts.py::TestTransientStorageInContractCreation::test_contract_creation@verkle@v0.0.6.

Generate fixtures for these test cases for Cancun with:

Cancun only: 

fill -v tests/cancun/eip1153_tstore/test_tstorage_create_contexts.py::TestTransientStorageInContractCreation::test_contract_creation --fork=Cancun --evm-bin=/path/to/evm-tool-dev-version

For all forks up to and including Cancun: 

fill -v tests/cancun/eip1153_tstore/test_tstorage_create_contexts.py::TestTransientStorageInContractCreation::test_contract_creation --until=Cancun

Test transient storage in contract creation contexts:

  • TSTORE/TLOAD in initcode should not be able to access the creator's transient storage.
  • TSTORE/TLOAD in initcode should be able to access the created contract's transient storage.
  • TSTORE/TLOAD in creator contract should be able to use its own transient storage.
Source code in tests/cancun/eip1153_tstore/test_tstorage_create_contexts.py 
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@CreateOpcodeParams.parametrize()
@InitcodeTestCases.parametrize()
class TestTransientStorageInContractCreation:
    """
    Test transient storage in contract creation contexts:

    - TSTORE/TLOAD in initcode should not be able to access the creator's transient storage.
    - TSTORE/TLOAD in initcode should be able to access the created contract's transient
        storage.
    - TSTORE/TLOAD in creator contract should be able to use its own transient storage.
    """

    @pytest.fixture()
    def create2_salt(self) -> int:  # noqa: D102
        return 0xDEADBEEF

    @pytest.fixture()
    def initcode(  # noqa: D102
        self,
        deploy_code: Bytecode,
        constructor_code: Bytecode,
    ) -> Initcode:
        return Initcode(deploy_code=deploy_code, initcode_prefix=constructor_code)

    @pytest.fixture()
    def creator_contract_code(  # noqa: D102
        self,
        opcode: Op,
        create2_salt: int,
    ) -> Bytecode:
        return (
            Op.TSTORE(0, 0x0100)
            + Op.TSTORE(1, 0x0200)
            + Op.TSTORE(2, 0x0300)
            + Op.CALLDATACOPY(0, 0, Op.CALLDATASIZE)
            + Op.SSTORE(4, Op.CALL(address=opcode(size=Op.CALLDATASIZE, salt=create2_salt)))
            # Save the state of transient storage following call to storage; the transient
            # storage should not have been overwritten
            + Op.SSTORE(0, Op.TLOAD(0))
            + Op.SSTORE(1, Op.TLOAD(1))
            + Op.SSTORE(2, Op.TLOAD(2))
        )

    @pytest.fixture()
    def creator_address(self, pre: Alloc, creator_contract_code: Bytecode) -> Address:
        """The address that creates the contract with create/create2"""
        return pre.deploy_contract(creator_contract_code)

    @pytest.fixture()
    def expected_creator_storage(self) -> dict:  # noqa: D102
        return {0: 0x0100, 1: 0x0200, 2: 0x0300, 4: 0x0001}

    @pytest.fixture()
    def created_contract_address(  # noqa: D102
        self, creator_address: Address, opcode: Op, create2_salt: int, initcode: Initcode
    ) -> Address:
        return compute_create_address(
            address=creator_address,
            nonce=1,
            salt=create2_salt,
            initcode=initcode,
            opcode=opcode,
        )

    def test_contract_creation(
        self,
        state_test: StateTestFiller,
        pre: Alloc,
        creator_address: Address,
        created_contract_address: Address,
        initcode: Initcode,
        deploy_code: Bytecode,
        expected_creator_storage: dict,
        expected_storage: dict,
    ) -> None:
        """
        Test transient storage in contract creation contexts.
        """
        sender = pre.fund_eoa()

        tx = Transaction(
            sender=sender,
            to=creator_address,
            data=initcode,
            gas_limit=1_000_000,
        )

        post = {
            creator_address: Account(
                nonce=2,
                storage=expected_creator_storage,
            ),
            created_contract_address: Account(
                nonce=1,
                code=deploy_code,
                storage=expected_storage,
            ),
        }

        state_test(
            env=Environment(),
            pre=pre,
            post=post,
            tx=tx,
        )

test_contract_creation(state_test, pre, creator_address, created_contract_address, initcode, deploy_code, expected_creator_storage, expected_storage)

Test transient storage in contract creation contexts.

Source code in tests/cancun/eip1153_tstore/test_tstorage_create_contexts.py 
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def test_contract_creation(
    self,
    state_test: StateTestFiller,
    pre: Alloc,
    creator_address: Address,
    created_contract_address: Address,
    initcode: Initcode,
    deploy_code: Bytecode,
    expected_creator_storage: dict,
    expected_storage: dict,
) -> None:
    """
    Test transient storage in contract creation contexts.
    """
    sender = pre.fund_eoa()

    tx = Transaction(
        sender=sender,
        to=creator_address,
        data=initcode,
        gas_limit=1_000_000,
    )

    post = {
        creator_address: Account(
            nonce=2,
            storage=expected_creator_storage,
        ),
        created_contract_address: Account(
            nonce=1,
            code=deploy_code,
            storage=expected_storage,
        ),
    }

    state_test(
        env=Environment(),
        pre=pre,
        post=post,
        tx=tx,
    )

Parametrized Test Cases

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

Skipped Parameters

For more concise readability, the table below does not list the following parameter values: fork, blockchain_test, state_test, state_test_only, eof_test, eof_state_test.

Test ID constructor_code deploy_code expected_storage opcode
only_constructor_code-create {0: 0, 1: 1} CREATE
only_constructor_code-create2 {0: 0, 1: 1} CREATE2
in_constructor_and_deployed_code-create {0: 0, 1: 0, 2: 1} CREATE
in_constructor_and_deployed_code-create2 {0: 0, 1: 0, 2: 1} CREATE2
across_constructor_and_deployed_code_v0-create {0: 0, 1: 1, 2: 1} CREATE
across_constructor_and_deployed_code_v0-create2 {0: 0, 1: 1, 2: 1} CREATE2
across_constructor_and_deployed_code_v1-create {0: 0, 1: 1, 2: 0, 3: 1, 4: 1} CREATE
across_constructor_and_deployed_code_v1-create2 {0: 0, 1: 1, 2: 0, 3: 1, 4: 1} CREATE2
no_constructor_code-create {0: 0, 1: 1} CREATE
no_constructor_code-create2 {0: 0, 1: 1} CREATE2
only_constructor_code-create {0: 0, 1: 1} CREATE
only_constructor_code-create2 {0: 0, 1: 1} CREATE2
in_constructor_and_deployed_code-create {0: 0, 1: 0, 2: 1} CREATE
in_constructor_and_deployed_code-create2 {0: 0, 1: 0, 2: 1} CREATE2
across_constructor_and_deployed_code_v0-create {0: 0, 1: 1, 2: 1} CREATE
across_constructor_and_deployed_code_v0-create2 {0: 0, 1: 1, 2: 1} CREATE2
across_constructor_and_deployed_code_v1-create {0: 0, 1: 1, 2: 0, 3: 1, 4: 1} CREATE
across_constructor_and_deployed_code_v1-create2 {0: 0, 1: 1, 2: 0, 3: 1, 4: 1} CREATE2
no_constructor_code-create {0: 0, 1: 1} CREATE
no_constructor_code-create2 {0: 0, 1: 1} CREATE2