use singular enum names

common.py

@@ -5,11 +5,11 @@ from typing import cast
 
 from spacepackets import SpacePacket, SpacePacketHeader
 from spacepackets.cfdp import (
-    TransmissionModes,
-    ChecksumTypes,
+    TransmissionMode,
+    ChecksumType,
     ConditionCode,
     PduHolder,
-    DirectiveTypes,
+    DirectiveType,
 )
 from spacepackets.cfdp.pdu import MetadataPdu, FileDataPdu
 from tmtccmd.cfdp import (
@@ -255,13 +255,13 @@ class TcHandler(TcHandlerBase):
                     pdu, sp = source_pair
                     pdu = cast(PduHolder, pdu)
                     if pdu.is_file_directive:
-                        if pdu.pdu_directive_type == DirectiveTypes.METADATA_PDU:
+                        if pdu.pdu_directive_type == DirectiveType.METADATA_PDU:
                             metadata = pdu.to_metadata_pdu()
                             self.queue_helper.add_log_cmd(
                                 f"CFDP Source: Sending Metadata PDU for file with size "
                                 f"{metadata.file_size}"
                             )
-                        elif pdu.pdu_directive_type == DirectiveTypes.EOF_PDU:
+                        elif pdu.pdu_directive_type == DirectiveType.EOF_PDU:
                             self.queue_helper.add_log_cmd(
                                 f"CFDP Source: Sending EOF PDU"
                             )
@@ -352,8 +352,8 @@ def setup_cfdp_handler() -> CfdpInCcsdsWrapper:
         max_file_segment_len=1024,
         check_limit=None,
         crc_on_transmission=False,
-        crc_type=ChecksumTypes.CRC_32,
-        default_transmission_mode=TransmissionModes.UNACKNOWLEDGED,
+        crc_type=ChecksumType.CRC_32,
+        default_transmission_mode=TransmissionMode.UNACKNOWLEDGED,
     )
     cfdp_seq_count_provider = FileSeqCountProvider(
         max_bit_width=16, file_name=Path("seqcnt_cfdp_transaction.txt")