# libSceNpWebApi technical debt

### Unknown function info

- [sceNpWebApiGetHttpStatusCode, sceNpWebApiReadData](../../../core/libs/prx/libSceNpWebApi/Export.cpp) - throw through `NotImplemented_nid_no_patch`; behaviour and the PS5 prototypes are unmeasured. The only source of the parameter lists is shadPS4's PS4-derived prototypes (GPLv2, used as a reference only), with no second reference; structure pointers are `void*` because no layout is known.
- [sceNpWebApiInitialize, sceNpWebApiTerminate, sceNpWebApiCreateHandle, sceNpWebApiDeleteHandle, sceNpWebApiCreatePushEventFilter, sceNpWebApiDeletePushEventFilter](../../../core/libs/prx/libSceNpWebApi/Export.cpp) (libSceNpWebApi, PS4) - signatures, id ranges (library contexts 1 to 0x7fff, handles and filters below 0xf0000000) and errors (`LIB_CONTEXT_NOT_FOUND`, `HANDLE_NOT_FOUND`, `PUSH_EVENT_FILTER_NOT_FOUND`, `INVALID_ARGUMENT` for a missing filter parameter) follow [shadPS4](https://github.com/shadps4-emu/shadPS4/blob/main/src/core/libraries/np/np_web_api/np_web_api_internal.cpp); they are not checked on a console. The libHttp context and pool size are kept but not used, since no request is ever sent. Limbo (CUSA01664) creates a context, a handle and filters when its game starts.
- [sceNpWebApiCreateServicePushEventFilter](../../../core/libs/prx/libSceNpWebApi/Export.cpp) (libSceNpWebApi, PS4) - a filter for a PSN service needs the signed-in user, and no user is signed in to PSN, so a valid call returns `SIGNED_IN_USER_NOT_FOUND` after the context and handle checks, as shadPS4 does with its network disabled. `sceNpWebApiDeleteServicePushEventFilter` therefore never finds a filter.
- [sceNpWebApiCreateContext, sceNpWebApiDeleteContext, sceNpWebApiCreateRequest, sceNpWebApiDeleteRequest, sceNpWebApiAbortRequest, sceNpWebApiSendRequest](../../../core/libs/prx/libSceNpWebApi/Export.cpp) (libSceNpWebApi, PS4) - the online id is not looked up: as in [shadPS4](https://github.com/shadps4-emu/shadPS4/blob/main/src/core/libraries/np/np_web_api/np_web_api_internal.cpp), a user context belongs to the initial user, so a library context holds at most one. With no user signed in to PSN, `sceNpWebApiSendRequest` returns `NOT_SIGNED_IN` unless the request is aborted. Id layouts and the delete, abort and not-found results match an offline PS4 Pro probe on firmware 10.71 (#9797); other checks follow shadPS4. That homebrew probe, with a non-retail SDK version, accepted method 99, so `INVALID_ARGUMENT` for a method after DELETE from SDK 2.50 is unverified. `sceNpWebApiTerminate` also deletes user contexts and requests; shadPS4 stops after the first user context.
- [sceNpWebApiRegisterPushEventCallback, sceNpWebApiUnregisterPushEventCallback, sceNpWebApiRegisterServicePushEventCallback, sceNpWebApiUnregisterServicePushEventCallback](../../../core/libs/prx/libSceNpWebApi/Export.cpp) (libSceNpWebApi, PS4) - registered callbacks are never called, since no push event arrives. A null function is rejected from SDK 1.00 and the filter must exist in the library context from SDK 2.50, as in shadPS4; this is not checked on a console. No service filter can be created, so from SDK 2.50 a service callback returns `SERVICE_PUSH_EVENT_FILTER_NOT_FOUND`. Callback ids come from the counter of handles and filters.