feat(forks): introduce max code size / max initcode size

Author: jochem-brouwer

src/ethereum_test_forks/base_fork.py

@@ -462,6 +462,18 @@ def evm_code_types(cls, block_number: int = 0, timestamp: int = 0) -> List[EVMCo
         """Return list of EVM code types supported by the fork."""
         pass
 
+    @classmethod
+    @abstractmethod
+    def max_code_size(cls) -> int | None:
+        """Return the maximum code size to be deployed in a CREATE-frame."""
+        pass
+
+    @classmethod
+    @abstractmethod
+    def max_initcode_size(cls) -> int | None:
+        """Return the maximum initcode size when using a CREATE frame."""
+        pass
+
     @classmethod
     @abstractmethod
     def call_opcodes(

src/ethereum_test_forks/forks/forks.py

@@ -364,6 +364,16 @@ def evm_code_types(cls, block_number: int = 0, timestamp: int = 0) -> List[EVMCo
         """At Genesis, only legacy EVM code is supported."""
         return [EVMCodeType.LEGACY]
 
+    @classmethod
+    def max_code_size(cls) -> None:
+        """At genesis, there is no upper bound for code size (bounded by block gas limit)."""
+        return None
+
+    @classmethod
+    def max_initcode_size(cls) -> None:
+        """At genesis, there is no upper bound for initcode size (bounded by block gas limit)."""
+        return None
+
     @classmethod
     def call_opcodes(
         cls, block_number: int = 0, timestamp: int = 0
@@ -629,6 +639,12 @@ def precompiles(cls, block_number: int = 0, timestamp: int = 0) -> List[Address]
             block_number, timestamp
         )
 
+    @classmethod
+    def max_code_size(cls) -> int:
+        # NOTE: Move this to Spurious Dragon once this fork is introduced. See EIP-170.
+        """At Spurious Dragon, an upper bound was introduced for max contract code size."""
+        return int(0x6000)
+
     @classmethod
     def call_opcodes(
         cls, block_number: int = 0, timestamp: int = 0
@@ -855,6 +871,11 @@ def engine_new_payload_version(
         """From Shanghai, new payload calls must use version 2."""
         return 2
 
+    @classmethod
+    def max_initcode_size(cls) -> int:
+        """From Shanghai, the initcode size is now limited. See EIP-3860."""
+        return int(0xC000)
+
     @classmethod
     def valid_opcodes(
         cls,
@@ -1302,6 +1323,16 @@ def engine_get_payload_version(
         """From Osaka, get payload calls must use version 5."""
         return 5
 
+    @classmethod
+    def max_code_size(cls) -> int:
+        """From Osaka, the max code size is lifted. See EIP-7907."""
+        return int(0x40000)
+
+    @classmethod
+    def max_initcode_size(cls) -> int:
+        """At genesis, there is no upper bound for initcode size (bounded by block gas limit)."""
+        return int(0x80000)
+
     @classmethod
     def is_deployed(cls) -> bool:
         """