Struct pallet_balances::NegativeImbalance

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pub struct NegativeImbalance<T: Config<I>, I: 'static = ()>(_);

Expand description

Opaque, move-only struct with private fields that serves as a token denoting that funds have been destroyed without any equal and opposite accounting.

Implementations

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impl<T: Config, I: 'static> NegativeImbalance<T, I>

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pub fn new(amount: T::Balance) -> Self

Create a new negative imbalance from a balance.

Trait Implementations

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impl<T: Config, I: 'static> Debug for NegativeImbalance<T, I> where
T: Debug,
I: Debug,

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

Formats the value using the given formatter. Read more

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impl<T: Config, I: 'static> Default for NegativeImbalance<T, I>

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fn default() -> Self

Returns the “default value” for a type. Read more

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impl<T: Config, I: 'static> Drop for NegativeImbalance<T, I>

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fn drop(&mut self)

Basic drop handler will just square up the total issuance.

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impl<T: Config, I: 'static> Imbalance<<T as Config>::Balance> for NegativeImbalance<T, I>

type Opposite = PositiveImbalance<T, I>

The oppositely imbalanced type. They come in pairs.

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fn zero() -> Self

The zero imbalance. Can be destroyed with drop_zero.

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fn drop_zero(self) -> Result<(), Self>

Drop an instance cleanly. Only works if its self.value() is zero.

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fn split(self, amount: T::Balance) -> (Self, Self)

Consume self and return two independent instances; the first is guaranteed to be at most amount and the second will be the remainder. Read more

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fn merge(self, other: Self) -> Self

Consume self and an other to return a new instance that combines both. Read more

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fn subsume(&mut self, other: Self)

Consume an other to mutate self into a new instance that combines both. Read more

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fn offset(self, other: Self::Opposite) -> SameOrOther<Self, Self::Opposite>

Consume self and along with an opposite counterpart to return a combined result. Read more

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fn peek(&self) -> T::Balance

The raw value of self.

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fn ration(self, first: u32, second: u32) -> (Self, Self) where
Balance: From<u32> + Saturating + Div<Balance, Output = Balance>,

Consume self and return two independent instances; the amounts returned will be in approximately the same ratio as first:second. Read more

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fn split_merge(self, amount: Balance, others: (Self, Self)) -> (Self, Self)

Consume self and add its two components, defined by the first component’s balance, element-wise to two pre-existing Imbalances. Read more

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fn ration_merge(
 self,
 first: u32,
 second: u32,
 others: (Self, Self)
) -> (Self, Self) where
 Balance: From<u32> + Saturating + Div<Balance, Output = Balance>,

Consume self and add its two components, defined by the ratio first:second, element-wise to two pre-existing Imbalances. Read more

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fn split_merge_into(self, amount: Balance, others: &mut (Self, Self))

Consume self and add its two components, defined by the first component’s balance, element-wise into two pre-existing Imbalance refs. Read more

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fn ration_merge_into(self, first: u32, second: u32, others: &mut (Self, Self)) where
Balance: From<u32> + Saturating + Div<Balance, Output = Balance>,

Consume self and add its two components, defined by the ratio first:second, element-wise to two pre-existing Imbalances. Read more

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fn merge_into(self, other: &mut Self)

Consume self to mutate other so that it combines both. Just like subsume, only with reversed arguments. Read more

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fn maybe_merge(self, other: Option<Self>) -> Self

Consume self and maybe an other to return a new instance that combines both. Read more

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fn maybe_subsume(&mut self, other: Option<Self>)

Maybe consume an other to mutate self into a new instance that combines both. Read more

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impl<T: PartialEq + Config, I: PartialEq + 'static> PartialEq<NegativeImbalance<T, I>> for NegativeImbalance<T, I> where
T::Balance: PartialEq,

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fn eq(&self, other: &NegativeImbalance<T, I>) -> bool

This method tests for self and other values to be equal, and is used by ==. Read more

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fn ne(&self, other: &NegativeImbalance<T, I>) -> bool

This method tests for !=.

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impl<T: Config, I: 'static> TryDrop for NegativeImbalance<T, I>

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fn try_drop(self) -> Result<(), Self>

Drop an instance cleanly. Only works if its value represents “no-operation”.

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impl<T: Eq + Config, I: Eq + 'static> Eq for NegativeImbalance<T, I> where
T::Balance: Eq,

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impl<T: Config, I: 'static> StructuralEq for NegativeImbalance<T, I>

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impl<T: Config, I: 'static> StructuralPartialEq for NegativeImbalance<T, I>

Auto Trait Implementations

impl<T, I> RefUnwindSafe for NegativeImbalance<T, I> where
<T as Config>::Balance: RefUnwindSafe,

impl<T, I> Send for NegativeImbalance<T, I>

impl<T, I> Sync for NegativeImbalance<T, I>

impl<T, I> Unpin for NegativeImbalance<T, I> where
<T as Config>::Balance: Unpin,

impl<T, I> UnwindSafe for NegativeImbalance<T, I> where
<T as Config>::Balance: 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,

const: unstable · source

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,

const: unstable · source

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

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impl<T> Clear for T where
T: Default + Eq + PartialEq<T>,

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pub fn is_clear(&self) -> bool

True iff no bits are set.

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pub fn clear() -> T

Return the value of Self that is clear.

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

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pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>ⓘ
Notable traits for Box<W, Global>
`impl<W> Write for Box<W, Global> where W: Write + ?Sized, impl<R> Read for Box<R, Global> where R: Read + ?Sized, impl<I, A> Iterator for Box<I, A> where I: Iterator + ?Sized, A: Allocator, type Item = ::Item;impl<F, A> Future for Box<F, A> where F: Future + Unpin + ?Sized, A: Allocator + 'static, type Output = <F as Future>::Output;`

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

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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

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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

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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

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

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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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