diff --git a/reliable_packet_substream_manager.go b/reliable_packet_substream_manager.go
deleted file mode 100644
index cd85ce63..00000000
--- a/reliable_packet_substream_manager.go
+++ /dev/null
@@ -1,93 +0,0 @@
-package nex
-
-import (
-	"crypto/rc4"
-)
-
-// ReliablePacketSubstreamManager represents a substream manager for reliable PRUDP packets
-type ReliablePacketSubstreamManager struct {
-	packetMap                 *MutexMap[uint16, PRUDPPacketInterface]
-	incomingSequenceIDCounter *Counter[uint16]
-	outgoingSequenceIDCounter *Counter[uint16]
-	cipher                    *rc4.Cipher
-	decipher                  *rc4.Cipher
-	fragmentedPayload         []byte
-	ResendScheduler           *ResendScheduler
-}
-
-// Update adds an incoming packet to the list of known packets and returns a list of packets to be processed in order
-func (psm *ReliablePacketSubstreamManager) Update(packet PRUDPPacketInterface) []PRUDPPacketInterface {
-	packets := make([]PRUDPPacketInterface, 0)
-
-	if packet.SequenceID() >= psm.incomingSequenceIDCounter.Value && !psm.packetMap.Has(packet.SequenceID()) {
-		psm.packetMap.Set(packet.SequenceID(), packet)
-
-		for psm.packetMap.Has(psm.incomingSequenceIDCounter.Value) {
-			storedPacket, _ := psm.packetMap.Get(psm.incomingSequenceIDCounter.Value)
-			packets = append(packets, storedPacket)
-			psm.packetMap.Delete(psm.incomingSequenceIDCounter.Value)
-			psm.incomingSequenceIDCounter.Next()
-		}
-	}
-
-	return packets
-}
-
-// SetCipherKey sets the reliable substreams RC4 cipher keys
-func (psm *ReliablePacketSubstreamManager) SetCipherKey(key []byte) {
-	cipher, _ := rc4.NewCipher(key)
-	decipher, _ := rc4.NewCipher(key)
-
-	psm.cipher = cipher
-	psm.decipher = decipher
-}
-
-// NextOutgoingSequenceID sets the reliable substreams RC4 cipher keys
-func (psm *ReliablePacketSubstreamManager) NextOutgoingSequenceID() uint16 {
-	return psm.outgoingSequenceIDCounter.Next()
-}
-
-// Decrypt decrypts the provided data with the substreams decipher
-func (psm *ReliablePacketSubstreamManager) Decrypt(data []byte) []byte {
-	ciphered := make([]byte, len(data))
-
-	psm.decipher.XORKeyStream(ciphered, data)
-
-	return ciphered
-}
-
-// Encrypt encrypts the provided data with the substreams cipher
-func (psm *ReliablePacketSubstreamManager) Encrypt(data []byte) []byte {
-	ciphered := make([]byte, len(data))
-
-	psm.cipher.XORKeyStream(ciphered, data)
-
-	return ciphered
-}
-
-// AddFragment adds the given fragment to the substreams fragmented payload
-// Returns the current fragmented payload
-func (psm *ReliablePacketSubstreamManager) AddFragment(fragment []byte) []byte {
-	psm.fragmentedPayload = append(psm.fragmentedPayload, fragment...)
-
-	return psm.fragmentedPayload
-}
-
-// ResetFragmentedPayload resets the substreams fragmented payload
-func (psm *ReliablePacketSubstreamManager) ResetFragmentedPayload() {
-	psm.fragmentedPayload = make([]byte, 0)
-}
-
-// NewReliablePacketSubstreamManager initializes a new ReliablePacketSubstreamManager with a starting counter value.
-func NewReliablePacketSubstreamManager(startingIncomingSequenceID, startingOutgoingSequenceID uint16) *ReliablePacketSubstreamManager {
-	psm := &ReliablePacketSubstreamManager{
-		packetMap:                 NewMutexMap[uint16, PRUDPPacketInterface](),
-		incomingSequenceIDCounter: NewCounter[uint16](startingIncomingSequenceID),
-		outgoingSequenceIDCounter: NewCounter[uint16](startingOutgoingSequenceID),
-		ResendScheduler:           NewResendScheduler(),
-	}
-
-	psm.SetCipherKey([]byte("CD&ML"))
-
-	return psm
-}