# libSceNpUniversalDataSystem technical debt

### Silent stubs

- [sceNpUniversalDataSystemRegisterContext](../../../core/libs/prx/libSceNpUniversalDataSystem/src/Context.cpp) (libSceNpUniversalDataSystem) - returns `SCE_NP_UNIVERSAL_DATA_SYSTEM_OK` without checking the context or handle and without recording anything. `sceNpUniversalDataSystemPostEvent` uses only its context and ignores the handle, so nothing depends on the registration. All ten titles in my set call it.
- [sceNpUniversalDataSystemDestroyHandle and sceNpUniversalDataSystemAbortHandle](../../../core/libs/prx/libSceNpUniversalDataSystem/src/Handle.cpp) (libSceNpUniversalDataSystem) - return `SCE_NP_UNIVERSAL_DATA_SYSTEM_OK` without checking the handle. `sceNpUniversalDataSystemCreateHandle` always hands out the same handle and keeps no state, so there is nothing to tear down. All ten titles in my set call `sceNpUniversalDataSystemDestroyHandle`; Metal Gear Solid 4 (PPSA18194) also calls `sceNpUniversalDataSystemAbortHandle`.

### Unknown function info

- [libSceNpUniversalDataSystem additional exports](../../../core/libs/prx/libSceNpUniversalDataSystem/Export.cpp) - these name/NID pairs are present in the 13.60 export inventory. Parameter lists, return types and behavior are unverified. Parameterless `int` declarations are import-resolution placeholders, not verified ABI prototypes; every entry throws through `NotImplemented_nid_no_patch`. No runtime functionality is implemented.

| Name | NID |
| --- | --- |
| `sceNpUniversalDataSystemIntCloseStream` | `pSyd06cKZVk` |
| `sceNpUniversalDataSystemIntDeleteUserData` | `IiSeRSN++Mc` |
| `sceNpUniversalDataSystemIntGetNpCommIdByNpTitleId` | `ONOoGEhy+mg` |
| `sceNpUniversalDataSystemIntGetNpTitleIdListByNpCommId` | `FgmhJGcGztU` |
| `sceNpUniversalDataSystemIntGetObjectState` | `KSHif9MWQjQ` |
| `sceNpUniversalDataSystemIntOpenObjectsDefinitionConfStream` | `O5enyfsJoK0` |
| `sceNpUniversalDataSystemIntOpenObjectsDefinitionConfStreamByObjectId` | `vOdDBWSu-Gk` |
| `sceNpUniversalDataSystemIntOpenStreamByUri` | `tkUOy4Ag4wo` |
| `sceNpUniversalDataSystemIntReadStream` | `ABFxQ2B50RA` |

- [Events](../../../core/libs/prx/libSceNpUniversalDataSystem/src/Event.cpp): `sceNpUniversalDataSystemCreateEvent` copies `prop` and returns the event's own property object through `prop_ptr`, as [KytyPS5](https://github.com/KytyPS5/KytyPS5/blob/9e41d8320a2774b303fbad344c2347e8d0292e83/src/libs/libTrophy.cpp) does; `sceNpUniversalDataSystemEventPropertyObjectSetObject`, `SetArray` and the array setters for objects and arrays store a copy of `value` and return the stored copy through `value_ptr`. Destroying a property object or array that its Create function did not return (an event's property object or a stored copy) does nothing, as its owner frees it. These ownership rules are not verified on a console, nor are the output of `sceNpUniversalDataSystemEventToString` (still `{}`) and `sceNpUniversalDataSystemEventEstimateSize` (still 3).
- [sceNpUniversalDataSystemCreateContext](../../../core/libs/prx/libSceNpUniversalDataSystem/src/Context.cpp) and [sceNpUniversalDataSystemCreateHandle](../../../core/libs/prx/libSceNpUniversalDataSystem/src/Handle.cpp) (libSceNpUniversalDataSystem) - native return codes for null output pointers (`context == nullptr` and `handle == nullptr`) are unresolved and unverified on a console. The reimplementation in [KytyPS5](https://github.com/KytyPS5/KytyPS5/blob/9e41d8320a2774b303fbad344c2347e8d0292e83/src/libs/libTrophy.cpp#L620-L640) returns `0x80553102` (`SCE_NP_UNIVERSAL_DATA_SYSTEM_ERROR_INVALID_ARGUMENT`), but this error return is unverified against native hardware; host paths continue to throw `std::invalid_argument` until the native contract is established.

- [sceNpUniversalDataSystemIntCreateRecordArray, sceNpUniversalDataSystemIntCreateRecordData and sceNpUniversalDataSystemIntCreateRecordObject](../../../core/libs/prx/libSceNpUniversalDataSystem/PendingExports.cpp) (libSceNpUniversalDataSystem) - The list is the intersection of the export table of the console's libSceNpUniversalDataSystem (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo; names and NIDs are present in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceNpUniversalDataSystem.c) and the [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv), but no credible prototypes were found. They are declared without parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified.
- [sceNpUniversalDataSystemIntDeleteAllRecord](../../../core/libs/prx/libSceNpUniversalDataSystem/PendingExports.cpp) (libSceNpUniversalDataSystem) - It is in the intersection of the export table of the console's libSceNpUniversalDataSystem (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo; names and NIDs are present in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceNpUniversalDataSystem.c) and the [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv), but no credible prototypes were found. It is declared without parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified.
- [sceNpUniversalDataSystemIntDestroyRecordArray and sceNpUniversalDataSystemIntDestroyRecordData](../../../core/libs/prx/libSceNpUniversalDataSystem/PendingExports.cpp) (libSceNpUniversalDataSystem) - The list is the intersection of the export table of the console's libSceNpUniversalDataSystem (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo; names and NIDs are present in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceNpUniversalDataSystem.c) and the [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv), but no credible prototypes were found. They are declared without parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified.
- [sceNpUniversalDataSystemIntDestroyRecordObject and sceNpUniversalDataSystemIntGetMemoryStat](../../../core/libs/prx/libSceNpUniversalDataSystem/PendingExports.cpp) (libSceNpUniversalDataSystem) - The list is the intersection of the export table of the console's libSceNpUniversalDataSystem (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo; names and NIDs are present in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceNpUniversalDataSystem.c) and the [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv), but no credible prototypes were found. They are declared without parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified.
- [sceNpUniversalDataSystemIntPostRecordData, sceNpUniversalDataSystemIntRecordArraySetArray and sceNpUniversalDataSystemIntRecordArraySetBinary](../../../core/libs/prx/libSceNpUniversalDataSystem/PendingExports.cpp) (libSceNpUniversalDataSystem) - The list is the intersection of the export table of the console's libSceNpUniversalDataSystem (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo; names and NIDs are present in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceNpUniversalDataSystem.c) and the [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv), but no credible prototypes were found. They are declared without parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified.
- [sceNpUniversalDataSystemIntRecordArraySetBool, sceNpUniversalDataSystemIntRecordArraySetFloat32 and sceNpUniversalDataSystemIntRecordArraySetFloat64](../../../core/libs/prx/libSceNpUniversalDataSystem/PendingExports.cpp) (libSceNpUniversalDataSystem) - The list is the intersection of the export table of the console's libSceNpUniversalDataSystem (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo; names and NIDs are present in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceNpUniversalDataSystem.c) and the [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv), but no credible prototypes were found. They are declared without parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified.
- [sceNpUniversalDataSystemIntRecordArraySetInt32, sceNpUniversalDataSystemIntRecordArraySetInt64 and sceNpUniversalDataSystemIntRecordArraySetObject](../../../core/libs/prx/libSceNpUniversalDataSystem/PendingExports.cpp) (libSceNpUniversalDataSystem) - The list is the intersection of the export table of the console's libSceNpUniversalDataSystem (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo; names and NIDs are present in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceNpUniversalDataSystem.c) and the [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv), but no credible prototypes were found. They are declared without parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified.
- [sceNpUniversalDataSystemIntRecordArraySetString, sceNpUniversalDataSystemIntRecordArraySetUInt32 and sceNpUniversalDataSystemIntRecordArraySetUInt64](../../../core/libs/prx/libSceNpUniversalDataSystem/PendingExports.cpp) (libSceNpUniversalDataSystem) - The list is the intersection of the export table of the console's libSceNpUniversalDataSystem (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo; names and NIDs are present in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceNpUniversalDataSystem.c) and the [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv), but no credible prototypes were found. They are declared without parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified.
- [sceNpUniversalDataSystemIntRecordDataEstimateSize, sceNpUniversalDataSystemIntRecordObjectSetArray and sceNpUniversalDataSystemIntRecordObjectSetBinary](../../../core/libs/prx/libSceNpUniversalDataSystem/PendingExports.cpp) (libSceNpUniversalDataSystem) - The list is the intersection of the export table of the console's libSceNpUniversalDataSystem (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo; names and NIDs are present in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceNpUniversalDataSystem.c) and the [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv), but no credible prototypes were found. They are declared without parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified.
- [sceNpUniversalDataSystemIntRecordObjectSetBool, sceNpUniversalDataSystemIntRecordObjectSetFloat32 and sceNpUniversalDataSystemIntRecordObjectSetFloat64](../../../core/libs/prx/libSceNpUniversalDataSystem/PendingExports.cpp) (libSceNpUniversalDataSystem) - The list is the intersection of the export table of the console's libSceNpUniversalDataSystem (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo; names and NIDs are present in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceNpUniversalDataSystem.c) and the [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv), but no credible prototypes were found. They are declared without parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified.
- [sceNpUniversalDataSystemIntRecordObjectSetInt32, sceNpUniversalDataSystemIntRecordObjectSetInt64 and sceNpUniversalDataSystemIntRecordObjectSetObject](../../../core/libs/prx/libSceNpUniversalDataSystem/PendingExports.cpp) (libSceNpUniversalDataSystem) - The list is the intersection of the export table of the console's libSceNpUniversalDataSystem (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo; names and NIDs are present in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceNpUniversalDataSystem.c) and the [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv), but no credible prototypes were found. They are declared without parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified.
- [sceNpUniversalDataSystemIntRecordObjectSetString, sceNpUniversalDataSystemIntRecordObjectSetUInt32 and sceNpUniversalDataSystemIntRecordObjectSetUInt64](../../../core/libs/prx/libSceNpUniversalDataSystem/PendingExports.cpp) (libSceNpUniversalDataSystem) - The list is the intersection of the export table of the console's libSceNpUniversalDataSystem (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo; names and NIDs are present in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceNpUniversalDataSystem.c) and the [verified NID name database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv), but no credible prototypes were found. They are declared without parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified.

### Functional

- [Trophy events](../../../core/libs/prx/libSceNpUniversalDataSystem/src/Event.cpp): `sceNpUniversalDataSystemPostEvent` stores an `_UnlockTrophy` event with an int32 `_trophy_id` of 0 or more as an unlock for the user and service label of its context, as KytyPS5 does, except an id that [libSceNpTrophy2](../../../core/libs/prx/libSceNpTrophy2/src/TrophyStore.cpp) refuses when the title's trophy data is loaded (one not in the data, a platinum or a progressive trophy). `_UpdateTrophyProgress` goes through the title's statistic rules like any other event (below). A context need not be registered, and every post of an event that `sceNpUniversalDataSystemCreateEvent` returned and that is not yet destroyed returns success (a null or any other event pointer stops the game): KytyPS5's errors for an unknown or unregistered context and for a malformed unlock are not verified. The storage statistics stay zero.
- [Statistics](../../../core/libs/prx/libSceNpUniversalDataSystem/src/Event.cpp): every other event goes through the title's rules in `sce_sys/uds/udsNN.ucp`, which [libSceNpTrophy2](../../../core/libs/prx/libSceNpTrophy2/src/TitleTrophies.cpp) reads. Only `"aggregation":"latest"` and `"max"` statistics of `dataType` `uint32`, `uint64` or `int32` are kept; no public source documents the other aggregations (such as `count`, `collection` and `eachLatest`) or types, so their definitions and rules are skipped. Only rules whose input is a `$.name` path (dotted for nested objects) are applied. A value is used when it is an integer of any width that is not negative and fits the statistic's type and `minValue`/`maxValue`; KytyPS5 requires the statistic's exact width, and whether the console converts, clamps or rejects other values is not known. Statistics are stored per user and service label, and every trophy's `unlockCondition` is compared after each event that sets one.