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The given answer does not work and can easily be circumvented with proxy, multi-sig, batch, or any other type of call wrapping. The better way to do this would be to set MaxValidatorCount to 0. Then n …

You should use BTreeMap, HashMap isn't available for the runtime storage. The underlying reason being that HashMaps have undeterministic behavior, therefore could likely break your consensus. Otherw …

The rule in the Rust programming language is: If you implement trait U for type T, either T or U must live in your crate. In this case, neither do, so you cannot do that. The standard fix for this, ca …

This trait seem to have been added years ago and hasn't had much change ever since. I think the primary purpose is to simply be the super-trait number of other sub-traits and be used for any type that …

Other than Oliver's answer, I want to point out that you are likely having the wrong mental model here. Your benchmarking code receives T, including T::HeadersToKeep and all the other configurations a …

When a type derives RuntimeDebug instead of Debug, then this string literal is printed ONLY in wasm. You have two options here: Run native via --execution Native. Change the derive, and make sure the …

The main point that you are missing is that NextKeys can only be set via the set_keys transaction. Once a new session is being enacted, if the validator set has changed, QueuedKeys is formed from the …

In short, any components that can influence the weight should be added to the weight function as a component. For example, in the case of on_initialize, if it depends in block_number and an arbitrary …

Getting the pallet version from polkadot-js-api is as simple as: await api.query.system.palletVersion() You can wrap this in a script to give you all of the pallet versions: …

Then, if you want to use it in the runtime, alongside the staking pallet, all you have to do is implement trait NpoSolver for your new implementation. …

The reason goes back to the fact that DispatchError::Other has a special annotation that nullifies the encoding of the inner &'static str: pub enum DispatchError { /// Some error occurred. Oth …

You can do so by implementing the pallet_authorship::EventHandler. pallet-collator-selection does exactly this, which is a pretty straightforward example. … Then, in the top level runtime, any pallet who's interested in receiving these events about block authorship has to be passed to the authorship pallet: // in your pallet impl<T: Config> pallet_authorship …

aside from the outer #[pallet] mod pallet {} and the fact that everything needs to be inside of this, internals of a pallet are almost entirely normal Rust and the mentioned items can appear anywhere …