Struct node_runtime::CurrencyAdapter[−][src]

pub struct CurrencyAdapter<C, OU>(_);

Expand description

Implements the transaction payment for a pallet implementing the Currency trait (eg. the pallet_balances) using an unbalance handler (implementing OnUnbalanced).

The unbalance handler is given 2 unbalanceds in OnUnbalanced::on_unbalanceds: fee and then tip.

Trait Implementations

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impl<T, C, OU> OnChargeTransaction<T> for CurrencyAdapter<C, OU> where
    C: Currency<<T as Config>::AccountId>,
    T: Config,
    OU: OnUnbalanced<<C as Currency<<T as Config>::AccountId>>::NegativeImbalance>,
    <T as Config>::TransactionByteFee: Get<<C as Currency<<T as Config>::AccountId>>::Balance>,
    <C as Currency<<T as Config>::AccountId>>::PositiveImbalance: Imbalance<<C as Currency<<T as Config>::AccountId>>::Balance>,
    <C as Currency<<T as Config>::AccountId>>::NegativeImbalance: Imbalance<<C as Currency<<T as Config>::AccountId>>::Balance>,
    <<C as Currency<<T as Config>::AccountId>>::PositiveImbalance as Imbalance<<C as Currency<<T as Config>::AccountId>>::Balance>>::Opposite == <C as Currency<<T as Config>::AccountId>>::NegativeImbalance,
    <<C as Currency<<T as Config>::AccountId>>::NegativeImbalance as Imbalance<<C as Currency<<T as Config>::AccountId>>::Balance>>::Opposite == <C as Currency<<T as Config>::AccountId>>::PositiveImbalance,

Default implementation for a Currency and an OnUnbalanced handler.

The unbalance handler is given 2 unbalanceds in OnUnbalanced::on_unbalanceds: fee and then tip.

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pub fn withdraw_fee(
    who: &<T as Config>::AccountId, 
    _call: &<T as Config>::Call, 
    _info: &<<T as Config>::Call as Dispatchable>::Info, 
    fee: <CurrencyAdapter<C, OU> as OnChargeTransaction<T>>::Balance, 
    tip: <CurrencyAdapter<C, OU> as OnChargeTransaction<T>>::Balance
) -> Result<<CurrencyAdapter<C, OU> as OnChargeTransaction<T>>::LiquidityInfo, TransactionValidityError>

Withdraw the predicted fee from the transaction origin.

Note: The fee already includes the tip.

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pub fn correct_and_deposit_fee(
    who: &<T as Config>::AccountId, 
    _dispatch_info: &<<T as Config>::Call as Dispatchable>::Info, 
    _post_info: &<<T as Config>::Call as Dispatchable>::PostInfo, 
    corrected_fee: <CurrencyAdapter<C, OU> as OnChargeTransaction<T>>::Balance, 
    tip: <CurrencyAdapter<C, OU> as OnChargeTransaction<T>>::Balance, 
    already_withdrawn: <CurrencyAdapter<C, OU> as OnChargeTransaction<T>>::LiquidityInfo
) -> Result<(), TransactionValidityError>

Hand the fee and the tip over to the [OnUnbalanced] implementation. Since the predicted fee might have been too high, parts of the fee may be refunded.

Note: The corrected_fee already includes the tip.

type LiquidityInfo = Option<<C as Currency<<T as Config>::AccountId>>::NegativeImbalance>

type Balance = <C as Currency<<T as Config>::AccountId>>::Balance

The underlying integer type in which fees are calculated.

Auto Trait Implementations

impl<C, OU> RefUnwindSafe for CurrencyAdapter<C, OU> where
    C: RefUnwindSafe,
    OU: RefUnwindSafe,

impl<C, OU> Send for CurrencyAdapter<C, OU> where
    C: Send,
    OU: Send,

impl<C, OU> Sync for CurrencyAdapter<C, OU> where
    C: Sync,
    OU: Sync,

impl<C, OU> Unpin for CurrencyAdapter<C, OU> where
    C: Unpin,
    OU: Unpin,

impl<C, OU> UnwindSafe for CurrencyAdapter<C, OU> where
    C: UnwindSafe,
    OU: UnwindSafe,

Blanket Implementations

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impl<T> Any for T where
    T: 'static + ?Sized,

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pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
    T: ?Sized,

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pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
    T: ?Sized,

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pub fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> CheckedConversion for T

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fn checked_from<T>(t: T) -> Option<Self> where
    Self: TryFrom<T>,

Convert from a value of T into an equivalent instance of Option<Self>. Read more

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fn checked_into<T>(self) -> Option<T> where
    Self: TryInto<T>,

Consume self to return Some equivalent value of Option<T>. Read more

impl<T> Downcast for T where
    T: Any,

pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait. Read more

pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait. Read more

pub fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s. Read more

pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s. Read more

impl<T> DowncastSync for T where
    T: Any + Send + Sync,

pub fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send + 'static>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait. Read more

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impl<T> From<T> for T

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pub fn from(t: T) -> T

Performs the conversion.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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impl<T, U> Into<U> for T where
    U: From<T>,

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pub fn into(self) -> U

Performs the conversion.

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impl<T> IsType<T> for T

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pub fn from_ref(t: &T) -> &T

Cast reference.

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pub fn into_ref(&self) -> &T

Cast reference.

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pub fn from_mut(t: &mut T) -> &mut T

Cast mutable reference.

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pub fn into_mut(&mut self) -> &mut T

Cast mutable reference.

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impl<T, Outer> IsWrappedBy<Outer> for T where
    T: From<Outer>,
    Outer: AsRef<T> + AsMut<T> + From<T>,

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pub fn from_ref(outer: &Outer) -> &T

Get a reference to the inner from the outer.

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pub fn from_mut(outer: &mut Outer) -> &mut T

Get a mutable reference to the inner from the outer.

impl<T> Same<T> for T

type Output = T

Should always be Self

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impl<T> SaturatedConversion for T

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fn saturated_from<T>(t: T) -> Self where
    Self: UniqueSaturatedFrom<T>,

Convert from a value of T into an equivalent instance of Self. Read more

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fn saturated_into<T>(self) -> T where
    Self: UniqueSaturatedInto<T>,

Consume self to return an equivalent value of T. Read more

impl<SS, SP> SupersetOf<SS> for SP where
    SS: SubsetOf<SP>,

pub fn to_subset(&self) -> Option<SS>

The inverse inclusion map: attempts to construct self from the equivalent element of its superset. Read more

pub fn is_in_subset(&self) -> bool

Checks if self is actually part of its subset T (and can be converted to it).

pub fn to_subset_unchecked(&self) -> SS

Use with care! Same as self.to_subset but without any property checks. Always succeeds.

pub fn from_subset(element: &SS) -> SP

The inclusion map: converts self to the equivalent element of its superset.

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impl<T, U> TryFrom<U> for T where
    U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

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pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

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impl<T, U> TryInto<U> for T where
    U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

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pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

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impl<S, T> UncheckedInto<T> for S where
    T: UncheckedFrom<S>,

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pub fn unchecked_into(self) -> T

The counterpart to unchecked_from.

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impl<T, S> UniqueSaturatedInto<T> for S where
    T: Bounded,
    S: TryInto<T>,

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pub fn unique_saturated_into(self) -> T

Consume self to return an equivalent value of T.

impl<V, T> VZip<V> for T where
    V: MultiLane<T>,

pub fn vzip(self) -> V

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impl<T> MaybeRefUnwindSafe for T where
    T: RefUnwindSafe,