I'm integrating my own pallet with Substrate's NFTs pallet. In my logic I try to create a collection with specific settings as follows:

let nft_collection_id = <T as Config<I>>::Nfts::create_collection(
                &CollectionConfig {
                    settings: CollectionSettings::from_disabled(
                        CollectionSetting::TransferableItems | CollectionSetting::DepositRequired
                    max_supply: None,
                    mint_settings: MintSettings::default(),

This results in the error WrongSetting. I can say that the error is caused by DepositRequired, since everything works if I remove this setting. So I'm having a hard time trying to understand why I'm getting this error.

In the a test of the Nfts pallet itself a very similar thing is done:

let collection_id = 1;
                CollectionSetting::TransferableItems | CollectionSetting::DepositRequired

The only difference is that I'm using create_collection instead of force_create. Is that the reason why I'm getting this error?

1 Answer 1


In Substrate is a recomended security practice to take a deposit from the user for any storage items they place on chain.

The create_collection function you are calling uses a deposit to create a collection, so if you try to disable it throws an error. The force_create works because is a special extrinsic that can be called only with special privilegies(See the code)

        // DepositRequired can be disabled by calling the force_create() only
            Error::<T, I>::WrongSetting

The deposit you have to reserve to create a collection is specified in the Config file of the NFT pallet:

/// The basic amount of funds that must be reserved for collection.
type CollectionDeposit: Get<DepositBalanceOf<Self, I>>;
  • This makes sense. Thanks for clearing this up. Commented Sep 19, 2023 at 6:34

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