Reverted experimental fix as game checks dll byte changes.

ptlinux/world_fix.py

@@ -1,9 +1,8 @@
-"""Exact-profile selection for the post-login V21 world-transition helper."""
+"""Retired V21 world-helper metadata and legacy status-file parsing."""
 
 from __future__ import annotations
 
 from dataclasses import dataclass
-import hashlib
 import json
 import os
 from pathlib import Path, PureWindowsPath
@@ -18,6 +17,12 @@ WORLD_FIX_HELPER_FILENAME = "pt-world-fix.exe"
 WORLD_FIX_HELPER_SHA256 = (
 	"a7a17d29ef4c11f9603790f0110a4d6823b91cce03f70e466b7e0bdbd6fa313e"
 )
+WORLD_FIX_ENABLED = False
+WORLD_FIX_DISABLED_REASON = (
+	"the experimental world fix is retired because PristonTale V21 periodically "
+	"checks the loaded game.dll code section; its five-byte map-loader detour "
+	"causes Module Code Sync Error / Banned Code 1"
+)
 WORLD_FIX_STATUS_PROTOCOL = 1
 WORLD_FIX_STATUS_MAX_BYTES = 64 * 1024
 
@@ -29,7 +34,7 @@ class WorldFixStatusTarget:
 
 
 class WorldFixError(RuntimeError):
-	"""Raised when an exact client needs a missing or untrusted helper."""
+	"""Raised when the retired helper is requested."""
 
 
 def packaged_world_fix_helper() -> Path:
@@ -41,32 +46,10 @@ def resolve_world_fix_helper(
 	*,
 	helper: Path | None = None,
 ) -> Path | None:
-	"""Return the verified helper only for the exact publisher V21 pair."""
+	"""Reject the retired helper before it can alter publisher module memory."""
 
-	game = game_directory.expanduser().resolve(strict=False)
-	hashes = {
-		name: _sha256(game / name)
-		for name in V21_BINARY_HASHES
-		if (game / name).is_file()
-	}
-	if hashes != V21_BINARY_HASHES:
-		return None
-	requested = packaged_world_fix_helper() if helper is None else helper.expanduser()
-	if requested.is_symlink():
-		raise WorldFixError(
-			"the post-login world-fix helper must not be a symbolic link"
-		)
-	candidate = requested.resolve()
-	if not candidate.is_file():
-		raise WorldFixError(
-			"the verified post-login world-fix helper is missing; reinstall the launcher"
-		)
-	digest = _sha256(candidate)
-	if digest != WORLD_FIX_HELPER_SHA256:
-		raise WorldFixError(
-			"the post-login world-fix helper failed its launcher integrity check"
-		)
-	return candidate
+	_ = game_directory, helper
+	raise WorldFixError(WORLD_FIX_DISABLED_REASON)
 
 
 def create_world_fix_status_target(
@@ -206,11 +189,3 @@ def _validated_status_event(value: object) -> dict[str, object] | None:
 			continue
 		clean[key] = item
 	return clean
-
-
-def _sha256(path: Path) -> str:
-	digest = hashlib.sha256()
-	with path.open("rb") as handle:
-		for chunk in iter(lambda: handle.read(1024 * 1024), b""):
-			digest.update(chunk)
-	return digest.hexdigest()