Questions tagged [traits]

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Conflicting `Encode` and `Decode` Trait Implementations for Type Aliases in a custom pallet

I'm working on a custom pallet related to the zero-knowledge proof system and I've run into an issue regarding the trait implementations. I have defined a fixed-size hash type H256 using a custom ...
Discardo's user avatar
  • 436
1 vote
1 answer
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Is it possible to define a storage inside the pallet without config trait?

Actually I want to define a storage without config trait but if I'm doing this then I'm getting lot of error. Is it possible? /// Author of current block. #[pallet::storage] pub type Author<...
Deepak Chaudhary's user avatar
0 votes
1 answer
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facing unconstrained type parameter issue

I'm using fresh node template and trying to implement below code: #[pallet::storage] pub type Author<T: Config> = StorageValue<_, sr25519::Public, OptionQuery>; pub struct ...
Deepak Chaudhary's user avatar
1 vote
1 answer
122 views

Customizing AccountId

In my runtime I'm using pub type AccountId = <<Signature as Verify>::Signer as IdentifyAccount>::AccountId;. Within my pallet I also need this type to implement From<SomeType>. I ...
magecnion's user avatar
  • 222
5 votes
1 answer
73 views

Trait item implementation is missing: `reserve_withdraw_assets`

I am running the Astar node locally and pointing to the astar-frame repository which is cloned on my local machine. In the Astar node repository, I added the paths-override method to the point all ...
Snowmead's user avatar
  • 625
2 votes
1 answer
75 views

How can I convert an account of type sp_runtime::traits::IdentifyAccount::AccountId to sp_runtime::AccountId32?

I get the following error when trying to convert my frame_system::Config::AccountId to a MultiAddress. expected enum `MultiAddress<sp_runtime::AccountId32, ()>` found enum `MultiAddress<&...
Snowmead's user avatar
  • 625
0 votes
1 answer
57 views

frontier template upgrade to polkadotv0.9.38 but using Babe instead of Aura

I've upgraded the frontier-node-template to substrate polkadot-v0.9.38, I've fixed all issues in runtime, migrated my code as well. But since last few days, I'm stuck in converting service.rs file in ...
Zubair Buriro's user avatar
1 vote
1 answer
62 views

How to implement the `Get` trait for a `Pallet<T>`?

I'm writing a pallet that implements evm::executor::stack::PrecompileSet. The goal is to use this pallet in conjunction with Frontier's pallet-evm, which has the following types in its Config trait: ...
Bernardo Rodrigues's user avatar
0 votes
1 answer
33 views

Multiple test mock runtimes with slightly different configs based off common base?

We have some custom pallet unit tests that use multiple mock runtimes that are configured slightly differently. The problem is that when we have to make changes to the runtime, we have to apply those ...
Robert La Ferla's user avatar
2 votes
1 answer
47 views

frame_support::traits::OnInitialize vs frame_support::traits::Hooks

Both of these have on_initialize calls. What's the difference? When is one run vs the other? Why are these separate concepts?
Kyle's user avatar
  • 311
3 votes
2 answers
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What is the difference between `Lookup` and `StaticLookup`?

The docs say that StaticLookup does not require "context" whereas Lookup does. What does this mean? Is there an example or a pallet where we can look at both Lookup and StaticLookup ...
Purple_Turtle's user avatar
2 votes
1 answer
159 views

trait bound MaxEncodedLen is not satisfied/not implemented for `RewardInfo<T>` or `<T as pallet::Config>::RelayChainAccountId`

My code for this crowdloan rewards pallet #[pallet::config] pub trait Config: frame_system::Config { type Event: From<Event<Self>> + IsType<<Self as frame_system::Config>::...
Russo's user avatar
  • 1,193
3 votes
1 answer
54 views

Basics > Runtime > Core primitives > frame_system / node_primitives vs core primitives / Docu of a Pallet configuration trait [closed]

My questions relate to Core Primitives for setting up a node with FRAME. Do I include the Core Primitives by using the Crate frame_system or Crate node_primitives? The core primitives mentioned here:...
Cindita's user avatar
  • 105
5 votes
3 answers
275 views

Missing trait problem

Hello the following code snippet is giving me headaches: mod items; pub use super::*; pub use crate::roles::items::*; pub type BalanceOf<T> = <<T as pallet::Config>::Currency as ...
Kazunobu Ndong's user avatar
5 votes
1 answer
730 views

Cannot infer type for type parameter 'T'

I have a function using the following 2 types: pub type BalanceOf<T> = <<T as pallet::Config>::Currency as Currency<<T as frame_system::Config>::AccountId>>::Balance; pub ...
Kazunobu Ndong's user avatar