Struct pallet_contracts::chain_extension::Diff

pub struct Diff {
    pub bytes_added: u32,
    pub bytes_removed: u32,
    pub items_added: u32,
    pub items_removed: u32,
}

This type is used to describe a storage change when charging from the meter.

Fields

bytes_added: u32

How many bytes were added to storage.

bytes_removed: u32

How many bytes were removed from storage.

items_added: u32

How many storage items were added to storage.

items_removed: u32

How many storage items were removed from storage.

Implementations

impl Diff

pub fn update_contract<T: Config>( &self, info: Option<&mut ContractInfo<T>> ) -> StorageDeposit<<<T as Config>::Currency as Inspect<<T as Config>::AccountId>>::Balance>

Calculate how much of a charge or refund results from applying the diff and store it in the passed info if any.

Note

In case None is passed for info only charges are calculated. This is because refunds are calculated pro rata of the existing storage within a contract and hence need extract this information from the passed info.

Trait Implementations

impl Debug for Diff

fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Diff

fn default() -> Diff

Returns the “default value” for a type.