Helpers

What they are

Helpers is a global server-side table defined in configs/s.helpers.lua. It wraps common framework operations (jobs, items, money, identifiers, admin) so your handlers don't have to deal with framework-specific code.

The underlying framework calls (Core.GetJob, Core.GetItemCount, etc.) are provided by devhub_lib — so as long as devhub_lib is configured for your framework, all helpers work the same way regardless of whether you use ESX, QBCore, or a custom core.

Functions

Helpers.CheckJob(source, job, grade)

Check if a player has a specific job, optionally with a minimum grade.

Parameters:

• source (number): Player server ID
• job (string): Job name (e.g. 'police')
• grade (number | nil): Minimum grade required (optional)

Returns: boolean

if Helpers.CheckJob(source, 'police', 2) then
    -- player is at least a grade 2 police officer
end

Helpers.HasItem(source, item, amount)

Check if the player has at least amount of an item in their inventory.

Parameters:

• source (number): Player server ID
• item (string): Item name
• amount (number | nil): Amount required (defaults to 1)

Returns: boolean

if Helpers.HasItem(source, 'energy_drink', 2) then
    -- player has at least 2 energy drinks
end

Helpers.CheckIdentifier(source, identifier)

Check if the player's identifier matches an exact value.

Parameters:

• source (number): Player server ID
• identifier (string): Identifier to match (e.g. 'license:abc...')

Returns: boolean

if Helpers.CheckIdentifier(source, 'license:abcdef1234567890') then
    -- this is THE player
end

Helpers.IsAdmin(source)

Convenience wrapper for Core.IsPlayerAdmin(source).

Returns: boolean

if Helpers.IsAdmin(source) then
    -- admin-only branch
end

Helpers.HasEnoughMoney(source, amount)

Check if the player has at least amount cash on hand.

Parameters:

• source (number): Player server ID
• amount (number): Required amount of cash

Returns: boolean

if Helpers.HasEnoughMoney(source, 500) then
    -- player can afford it
end

Helpers.CheckUnlockedSkill(source, categoryUid, skillUid)

Check if a specific skill is already unlocked. Useful for chaining unlocks (require a previous skill).

Parameters:

• source (number): Player server ID
• categoryUid (string): Category UID
• skillUid (string): Skill UID

Returns: boolean

if Helpers.CheckUnlockedSkill(source, 'personal', 'runFaster_1') then
    -- prerequisite met
end

Helpers.RemoveItem(source, item, amount)

Remove an item from the player's inventory.

Parameters:

• source (number): Player server ID
• item (string): Item name
• amount (number | nil): Amount to remove (defaults to 1)

Helpers.RemoveItem(source, 'energy_drink', 1)

Helpers.RemoveMoney(source, amount)

Remove cash from the player.

Parameters:

• source (number): Player server ID
• amount (number): Amount of cash to remove

Helpers.RemoveMoney(source, 500)

Example — combined unlock requirement

A skill that requires the player to be a grade 2+ police officer, hold an energy drink, and pay $500 in cash:

Config.UnlockHandlerForSkills = {
    ['personal'] = {
        ['runFaster_3'] = {
            unlockRequirementMessage = 'Police only — costs 1 energy drink and $500.',
            handler = function(source)
                if not Helpers.CheckJob(source, 'police', 2) then return false end
                if not Helpers.HasItem(source, 'energy_drink', 1) then return false end
                if not Helpers.HasEnoughMoney(source, 500) then return false end
 
                Helpers.RemoveItem(source, 'energy_drink', 1)
                Helpers.RemoveMoney(source, 500)
                return true
            end,
        },
    },
}

Example — premium currency handler

The same helpers can power a premium currency handler that uses regular cash as the "premium" payment:

Config.PremiumCurrency = {
    type = "optional",
    label = "$",
    icon = "fas fa-dollar-sign",
    handler = function(amount, categoryUid, skillUid, source)
        if not Helpers.HasEnoughMoney(source, amount) then return false end
        Helpers.RemoveMoney(source, amount)
        return true
    end,
}