Permissions for Research Table

trying to add permissions to instant research plugin:

Code:

void OnItemResearchStart(ResearchTable table, BaseEntity target)
{
if (permission.UserHasPermission(target.OwnerID.ToString(), "instantresearch.use")) {table.researchDuration = 0f;} else {table.researchDuration = 10f;}
}

but on research starts i am getting this:

Code:

[Error] Failed to call hook 'OnItemResearchStart' on plugin 'InstantResearch v1.1.0' (NullReferenceException: Object reference not set to an instance of an object)
[Stacktrace]   at Oxide.Plugins.InstantResearch.OnItemResearchStart (.ResearchTable table, .BaseEntity target) [0x00000] in <filename unknown>:0
  at Oxide.Plugins.InstantResearch.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (HookMethod method, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00000] in <filename unknown>:0

any advice if it's possible to add such perm?

 

something like this:

Code:

void OnItemResearchStart(ResearchTable table, BaseEntity target, BasePlayer player)
{
if (player != null && permission.UserHasPermission(target.OwnerID.ToString(), "instantresearch.use")) {table.researchDuration = 0f;} else {table.researchDuration = 10f;}
}

?

 

i got rid of the error with null check:

Code:

void OnItemResearchStart(ResearchTable table, BasePlayer player)
{
if (player != null && permission.UserHasPermission(player.ToString(), "instantresearch.use")) {table.researchDuration = 0f;} else {table.researchDuration = 10f;}
}

but there still is no effect of insta research. don't get what i am doing wrong.. еxcept that i am noob in coding =]
it works if permission set for the group and i check for it, but it's pointless. it should work with player permissions..

 

Code:

namespace Oxide.Plugins
{
    [Info("Instant Research", "Artasan", "1.1.0", ResourceId = 1318)]
    [Description("Instant research in research table")]
    public class InstantResearch : RustPlugin
    {
        string perm = "instantresearch.use";
        float insta = 0f;
        float dur = 10f;        void Init()
        {
            if (!permission.PermissionExists(perm)) permission.RegisterPermission(perm, this);
        }        void OnItemResearchStart(ResearchTable t, BasePlayer p)
        {
            if (p == null) return;
            if (permission.UserHasPermission(p.UserIDString, perm)) {t.researchDuration = insta;} else {t.researchDuration = dur;}
        }
    }
}

and still nothing.. can u point me please with more details? =\