This is used for Push Notifications.

npns:u

This is "nn::npns::INpnsUser".

Cmd	Name
1	ListenAll
2	ListenTo
3	Receive
4	ReceiveRaw
5	GetReceiveEvent
7	GetStateChangeEvent
21	CreateToken
23	DestroyToken
25	QueryIsTokenValid
26	[5.0.0+] ListenToMyApplicationId
101	Suspend
102	Resume
103	GetState
104	[3.0.0+] GetStatistics
111	GetJid
120	[7.0.0+] #CreateNotificationReceiver
151	[8.0.0+] GetStateWithHandover
152	[8.0.0+] GetStateChangeEventWithHandover
153	[8.0.0+] GetDropEventWithHandover

[5.0.0+] CreateToken/DestroyToken now takes an additional 8-bytes of input and a PID.

CreateNotificationReceiver

This is "nn::npns::INotificationReceiver".

This was added with [7.0.0+].

Cmd	Name	Notes
1	ListenTo	Takes a total of 8-bytes of input, no output.
2	ListenToMyApplicationId	Takes a total of 8-bytes of input and a PID, no output.
3	Receive	Takes a total of 2-bytes of input and a type-0x6 output buffer.
4	GetReceiveEvent	No input, returns an output handle.

This is "nn::npns::INpnsSystem".

Cmd	Name
1	ListenAll
2	ListenTo
3	Receive
4	ReceiveRaw
5	GetReceiveEvent
6	ListenUndelivered
7	GetStateChangeEvent
11	SubscribeTopic
12	UnsubscribeTopic
13	QueryIsTopicExist
21	CreateToken
22	CreateTokenWithApplicationId
23	DestroyToken
24	DestroyTokenWithApplicationId
25	QueryIsTokenValid
26	[5.0.0+] ListenToMyApplicationId
31	UploadTokenToBaaS
32	DestroyTokenForBaaS
33	[7.0.0+] CreateTokenForBaas
34	[7.0.0+] SetBaasDeviceAccountIdList
101	Suspend
102	Resume
103	GetState
104	[3.0.0+] GetStatistics
105	[3.0.0+] GetPlayReportRequestEvent
111	GetJid
112	CreateJid
113	DestroyJid
114	AttachJid
115	DetachJid
120	[7.0.0+] #CreateNotificationReceiver
151	[8.0.0+] GetStateWithHandover
152	[8.0.0+] GetStateChangeEventWithHandover
153	[8.0.0+] GetDropEventWithHandover
161	[10.0.0+] GetRequestChangeStateCancelEvent
162	[10.0.0+] RequestChangeStateForceTimedWithCancelEvent
201	[3.0.0+] RequestChangeStateForceTimed
202	[3.0.0+] RequestChangeStateForceAsync

[5.0.0+] CreateToken/DestroyToken now takes an additional 8-bytes of input and a PID.