fix #888: Allow canonical case-insensitive ledger-object names in type filter

Author: ckeshava

tests/integration/reqs/test_account_objects.py

@@ -13,3 +13,24 @@ async def test_basic_functionality(self, client):
             )
         )
         self.assertTrue(response.is_successful())
+
+    @test_async_and_sync(globals())
+    async def test_type_filter(self, client):
+        response = await client.request(
+            AccountObjects(
+                account=WALLET.address,
+                type="Escrow",
+            )
+        )
+        self.assertTrue(response.is_successful())
+        self.assertIsNotNone(response.result["account_objects"])
+
+        # test case-insensitive type filter
+        response = await client.request(
+            AccountObjects(
+                account=WALLET.address,
+                type="mPtOkeNisSuance",
+            )
+        )
+        self.assertTrue(response.is_successful())
+        self.assertIsNotNone(response.result["account_objects"])

xrpl/models/requests/account_objects.py

@@ -9,7 +9,7 @@
 
 from dataclasses import dataclass, field
 from enum import Enum
-from typing import Any, Optional
+from typing import Any, Optional, Union
 
 from xrpl.models.requests.request import LookupByLedgerRequest, Request, RequestMethod
 from xrpl.models.required import REQUIRED
@@ -65,7 +65,7 @@ class AccountObjects(Request, LookupByLedgerRequest):
     """
 
     method: RequestMethod = field(default=RequestMethod.ACCOUNT_OBJECTS, init=False)
-    type: Optional[AccountObjectType] = None
+    type: Optional[Union[AccountObjectType, str]] = None
     deletion_blockers_only: bool = False
     limit: Optional[int] = None
     # marker data shape is actually undefined in the spec, up to the