Merge pull request #888 from ethereum/pre-reqs-for-devnet-4-updates

feat(fw): Changes required for Devnet-4 Tests

docs/CHANGELOG.md

@@ -46,8 +46,9 @@ Test fixtures for use by clients are available for each release on the [Github r
 - ✨ Add `Wei` type to `ethereum_test_base_types` which allows parsing wei amounts from strings like "1 ether", "1000 wei", "10**2 gwei", etc ([#825](https://github.com/ethereum/execution-spec-tests/pull/825)).
 - ✨ Pin EELS versions in `eels_resolutions.json` and include this file in fixture releases ([#872](https://github.com/ethereum/execution-spec-tests/pull/872)).
 - 🔀 Replace `ethereum.base_types` with `ethereum-types` ([#850](https://github.com/ethereum/execution-spec-tests/pull/850)).
-- 💥 `PragueEIP7692` fork has been renamed to `Osaka` ([#869](https://github.com/ethereum/execution-spec-tests/pull/869))
+- 💥 Rename the `PragueEIP7692` fork to `Osaka` ([#869](https://github.com/ethereum/execution-spec-tests/pull/869)).
 - ✨ Improve `fill` terminal output to emphasize that filling tests is not actually testing a client ([#807](https://github.com/ethereum/execution-spec-tests/pull/887)).
+- ✨ Add the `BlockchainTestEngine` test spec type that only generates a fixture in the `EngineFixture` (`blockchain_test_engine`) format ([#888](https://github.com/ethereum/execution-spec-tests/pull/888)).
 
 ### 🔧 EVM Tools
 

docs/writing_tests/writing_a_new_test.md

@@ -76,6 +76,8 @@ def test_contract_creating_tx(
 
 The `state_test` and `blockchain_test` objects are actually wrapper classes to the `StateTest`, respectively `BlockchainTest` objects, that once called actually instantiate a new instance of these objects and fill the test case using the `evm` tool according to the pre and post states and the transactions defined within the test.
 
+If a blockchain-type test should only generate a test fixture in the Engine format (`EngineFixture`), the `blockchain_test_engine` object can be specified. This object is a wrapper for the `BlockchainTestEngine` class.
+
 ## `StateTest` Object
 
 The `StateTest` object represents a single test vector, and contains the
@@ -100,6 +102,10 @@ Ethereum VM by attempting to append multiple blocks to the chain:
     created or modified after all blocks are executed.
 - `blocks`: All blocks to be appended to the blockchain during the test.
 
+## `BlockchainTestEngine` Object
+
+The `BlockchainTestEngine` object has the same properties as the `BlockchainTest` but it's used to only generate a blockchain test in the Engine format.
+
 ## Pre/Post State of the Test
 
 The `pre` and `post` states are elemental to setup and then verify the outcome

src/ethereum_test_base_types/base_types.py

@@ -2,6 +2,7 @@
 Basic type primitives used to define other types.
 """
 
+from hashlib import sha256
 from typing import Any, ClassVar, SupportsBytes, Type, TypeVar
 
 from Crypto.Hash import keccak
@@ -162,7 +163,7 @@ class Bytes(bytes, ToStringSchema):
     Class that helps represent bytes of variable length in tests.
     """
 
-    def __new__(cls, input: BytesConvertible):
+    def __new__(cls, input: BytesConvertible = b""):
         """
         Creates a new Bytes object.
         """
@@ -204,6 +205,12 @@ def keccak256(self) -> "Hash":
         k = keccak.new(digest_bits=256)
         return Hash(k.update(bytes(self)).digest())
 
+    def sha256(self) -> "Hash":
+        """
+        Return the sha256 hash of the opcode byte representation.
+        """
+        return Hash(sha256(self).digest())
+
 
 S = TypeVar("S", bound="FixedSizeHexNumber")
 
@@ -279,6 +286,7 @@ class FixedSizeBytes(Bytes):
     """
 
     byte_length: ClassVar[int]
+    _sized_: ClassVar[Type["FixedSizeBytes"]]
 
     def __class_getitem__(cls, length: int) -> Type["FixedSizeBytes"]:
         """
@@ -288,6 +296,7 @@ def __class_getitem__(cls, length: int) -> Type["FixedSizeBytes"]:
         class Sized(cls):  # type: ignore
             byte_length = length
 
+        Sized._sized_ = Sized
         return Sized
 
     def __new__(cls, input: FixedSizeBytesConvertible | T):
@@ -317,14 +326,16 @@ def __eq__(self, other: object) -> bool:
         """
         Compares two FixedSizeBytes objects to be equal.
         """
+        if other is None:
+            return False
         if not isinstance(other, FixedSizeBytes):
             assert (
                 isinstance(other, str)
                 or isinstance(other, int)
                 or isinstance(other, bytes)
                 or isinstance(other, SupportsBytes)
             )
-            other = self.__class__(other)
+            other = self._sized_(other)
         return super().__eq__(other)
 
     def __ne__(self, other: object) -> bool:
@@ -341,6 +352,17 @@ class Address(FixedSizeBytes[20]):  # type: ignore
 
     label: str | None = None
 
+    def __new__(cls, input: "FixedSizeBytesConvertible | Address", *, label: str | None = None):
+        """
+        Creates a new Address object with an optional label.
+        """
+        instance = super(Address, cls).__new__(cls, input)
+        if isinstance(input, Address) and label is None:
+            instance.label = input.label
+        else:
+            instance.label = label
+        return instance
+
 
 class Hash(FixedSizeBytes[32]):  # type: ignore
     """

src/ethereum_test_specs/__init__.py

@@ -5,7 +5,14 @@
 from typing import List, Type
 
 from .base import BaseTest, TestSpec
-from .blockchain import BlockchainTest, BlockchainTestFiller, BlockchainTestSpec
+from .blockchain import (
+    BlockchainTest,
+    BlockchainTestEngine,
+    BlockchainTestEngineFiller,
+    BlockchainTestEngineSpec,
+    BlockchainTestFiller,
+    BlockchainTestSpec,
+)
 from .eof import (
     EOFStateTest,
     EOFStateTestFiller,
@@ -18,6 +25,7 @@
 
 SPEC_TYPES: List[Type[BaseTest]] = [
     BlockchainTest,
+    BlockchainTestEngine,
     StateTest,
     StateTestOnly,
     EOFTest,
@@ -29,6 +37,9 @@
     "SPEC_TYPES",
     "BaseTest",
     "BlockchainTest",
+    "BlockchainTestEngine",
+    "BlockchainTestEngineFiller",
+    "BlockchainTestEngineSpec",
     "BlockchainTestFiller",
     "BlockchainTestSpec",
     "EOFStateTest",

src/ethereum_test_specs/blockchain.py

@@ -751,3 +751,17 @@ def generate(
 
 BlockchainTestSpec = Callable[[str], Generator[BlockchainTest, None, None]]
 BlockchainTestFiller = Type[BlockchainTest]
+
+
+class BlockchainTestEngine(BlockchainTest):
+    """
+    Filler type that tests multiple blocks (valid or invalid) in a chain, only for the Engine API.
+    """
+
+    supported_fixture_formats: ClassVar[List[FixtureFormat]] = [
+        BlockchainEngineFixture,
+    ]
+
+
+BlockchainTestEngineSpec = Callable[[str], Generator[BlockchainTestEngine, None, None]]
+BlockchainTestEngineFiller = Type[BlockchainTestEngine]

src/ethereum_test_tools/__init__.py

@@ -25,6 +25,8 @@
     SPEC_TYPES,
     BaseTest,
     BlockchainTest,
+    BlockchainTestEngine,
+    BlockchainTestEngineFiller,
     BlockchainTestFiller,
     EOFStateTest,
     EOFStateTestFiller,
@@ -93,6 +95,8 @@
     "BaseTest",
     "Block",
     "BlockchainTest",
+    "BlockchainTestEngine",
+    "BlockchainTestEngineFiller",
     "BlockchainTestFiller",
     "BlockException",
     "Bytecode",

src/ethereum_test_tools/code/generators.py

@@ -5,6 +5,7 @@
 from dataclasses import dataclass
 from typing import List, SupportsBytes
 
+from ethereum_test_base_types import Bytes
 from ethereum_test_types import ceiling_division
 from ethereum_test_vm import Bytecode, EVMCodeType
 from ethereum_test_vm import Opcodes as Op
@@ -27,7 +28,7 @@ class Initcode(Bytecode):
     costs.
     """
 
-    deploy_code: SupportsBytes
+    deploy_code: SupportsBytes | Bytes
     """
     Bytecode to be deployed by the initcode.
     """
@@ -44,7 +45,7 @@ class Initcode(Bytecode):
     def __new__(
         cls,
         *,
-        deploy_code: SupportsBytes = Bytecode(),
+        deploy_code: SupportsBytes | Bytes = Bytecode(),
         initcode_length: int | None = None,
         initcode_prefix: Bytecode = Bytecode(),
         initcode_prefix_execution_gas: int = 0,

src/ethereum_test_types/types.py

@@ -310,6 +310,7 @@ def fund_eoa(
         label: str | None = None,
         storage: Storage | None = None,
         delegation: Address | Literal["Self"] | None = None,
+        nonce: NumberConvertible | None = None,
     ) -> EOA:
         """
         Add a previously unused EOA to the pre-alloc with the balance specified by `amount`.

src/pytest_plugins/filler/pre_alloc.py

@@ -199,6 +199,7 @@ def fund_eoa(
         label: str | None = None,
         storage: Storage | None = None,
         delegation: Address | Literal["Self"] | None = None,
+        nonce: NumberConvertible | None = None,
     ) -> EOA:
         """
         Add a previously unused EOA to the pre-alloc with the balance specified by `amount`.
@@ -209,25 +210,34 @@ def fund_eoa(
         eoa = next(self._eoa_iterator)
         if amount is None:
             amount = self._eoa_fund_amount_default
-        if Number(amount) > 0 or storage is not None or delegation is not None:
+        if (
+            Number(amount) > 0
+            or storage is not None
+            or delegation is not None
+            or (nonce is not None and Number(nonce) > 0)
+        ):
             if storage is None and delegation is None:
+                nonce = Number(0 if nonce is None else nonce)
                 account = Account(
-                    nonce=0,
+                    nonce=nonce,
                     balance=amount,
                 )
+                if nonce > 0:
+                    eoa.nonce = nonce
             else:
                 # Type-4 transaction is sent to the EOA to set the storage, so the nonce must be 1
                 if not isinstance(delegation, Address) and delegation == "Self":
                     delegation = eoa
+                nonce = Number(1 if nonce is None else nonce)
                 account = Account(
-                    nonce=1,
+                    nonce=nonce,
                     balance=amount,
                     storage=storage if storage is not None else {},
                     code=DELEGATION_DESIGNATION + bytes(delegation)  # type: ignore
                     if delegation is not None
                     else b"",
                 )
-                eoa.nonce = Number(1)
+                eoa.nonce = nonce
 
             super().__setitem__(eoa, account)
         return eoa