feat: reorganize constants into separate modules; update validation logic for mnemonic and API key lengths

pyfragment/models/enums.py

@@ -1,6 +1,9 @@
 from __future__ import annotations
 
 from enum import StrEnum
+from typing import Any
+
+from tonutils.contracts.wallet import WalletV4R2, WalletV5R1
 
 
 class PaymentMethod(StrEnum):
@@ -13,6 +16,12 @@ class WalletVersion(StrEnum):
     V5R1 = "V5R1"
 
 
+WALLET_CLASSES: dict[WalletVersion, Any] = {
+    WalletVersion.V4R2: WalletV4R2,
+    WalletVersion.V5R1: WalletV5R1,
+}
+
+
 class SupportedBrowser(StrEnum):
     ARC = "arc"
     BRAVE = "brave"
@@ -29,4 +38,4 @@ class SupportedBrowser(StrEnum):
     VIVALDI = "vivaldi"
 
 
-__all__ = ["PaymentMethod", "SupportedBrowser", "WalletVersion"]
+__all__ = ["PaymentMethod", "SupportedBrowser", "WALLET_CLASSES", "WalletVersion"]