INVENTORY::_0xFD41D1D4350F6413 fails when another player is nearby due to blocking flags

[OualiS]

What happened?

When calling INVENTORY::_0xFD41D1D4350F6413, the native works correctly when the player is alone, but fails silently when another player is nearby.

After analyzing the decompiled shop_general.c script (func_775), the issue is that the flags field (f_6 of the struct passed to the native) gets blocking bits (4 and 8) set when:

1. func_773() returns true (detects another player nearby via tunable checks)
2. Global_1956123.f_1 is 0 (catalog not marked as "open")

This results in f_6 = 12 (bits 4 | 8), which causes the native to reject the inventory operation. The only bypass is if the item is in the shop's 20-item whitelist (Global_1915715.f_3[shopId].f_418[]), which resets f_6 to 0.

Expected result

The native INVENTORY::_0xFD41D1D4350F6413 should process the inventory operation regardless of whether another player is nearby, or at minimum provide an error/return value indicating why it was blocked.

Reproduction steps

1. Join an online session and go to a shop
2. Call INVENTORY::_0xFD41D1D4350F6413 with a valid item struct — it works
3. Have another player stand near you (same shop area)
4. Call the same native with the same parameters — it silently fails

Importancy

There's a workaround

Area(s)

RedM

Specific version(s)

Build 1491.50

Additional information

Root cause traced in decompiled script script_mp_rel/shop_general.c, function func_775 (lines 25242-25362).

The blocking logic chain:

• func_773() detects multiplayer context via tunable hashes
• Combined with !Global_1956123.f_1 (catalog not open), sets bVar35 = true
• This forces bVar37 = true → iVar32 |= 4 | 8 (blocking flags)
• Unless the item is in the shop whitelist (Global_1915715.f_3[shopId].f_418[0..19]), the flags remain and the native rejects the operation

Possible workarounds:

• Set Global_1956123.f_1 = 1 before calling the native
• Force f_6 = 0 in the struct before passing it to the native
• Add the item to the shop whitelist array