Attribute Macro frame_support::pallet_macros::compact

#[compact]

Declares the arguments of a call function to be encoded using codec::Compact.

This will results in smaller extrinsic encoding.

A common example of compact is for numeric values that are often times far far away from their theoretical maximum. For example, in the context of a crypto-currency, the balance of an individual account is oftentimes way less than what the numeric type allows. In all such cases, using compact is sensible.

#[frame_support::pallet(dev_mode)]
pub mod custom_pallet {
    #[pallet::call]
    impl<T: Config> Pallet<T> {
        pub fn some_dispatchable(_origin: OriginFor<T>, #[pallet::compact] _input: u32) -> DispatchResult {
            Ok(())
        }
    }
}

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Documentation for this macro can be found at `frame_support::pallet_macros::compact`.