pub struct GroupRotationInfo<N = u32> {
    pub session_start_block: N,
    pub group_rotation_frequency: N,
    pub now: N,
}
Expand description

A helper data-type for tracking validator-group rotations.

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§session_start_block: N

The block number where the session started.

§group_rotation_frequency: N

How often groups rotate. 0 means never.

§now: N

The current block number.

Implementations§

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impl GroupRotationInfo<u32>

pub fn group_for_core(&self, core_index: CoreIndex, cores: usize) -> GroupIndex

Returns the index of the group needed to validate the core at the given index, assuming the given number of cores.

core_index should be less than cores, which is capped at u32::max().

pub fn core_for_group(&self, group_index: GroupIndex, cores: usize) -> CoreIndex

Returns the index of the group assigned to the given core. This does no checking or whether the group index is in-bounds.

core_index should be less than cores, which is capped at u32::max().

pub fn bump_rotation(&self) -> GroupRotationInfo<u32>

Create a new GroupRotationInfo with one further rotation applied.

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impl<N> GroupRotationInfo<N>where N: Saturating + BaseArithmetic + Copy,

pub fn next_rotation_at(&self) -> N

Returns the block number of the next rotation after the current block. If the current block is 10 and the rotation frequency is 5, this should return 15.

pub fn last_rotation_at(&self) -> N

Returns the block number of the last rotation before or including the current block. If the current block is 10 and the rotation frequency is 5, this should return 10.

Trait Implementations§

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impl<N> Clone for GroupRotationInfo<N>where N: Clone,

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fn clone(&self) -> GroupRotationInfo<N>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<N> Debug for GroupRotationInfo<N>where N: Debug,

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

Formats the value using the given formatter. Read more
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impl<N> Decode for GroupRotationInfo<N>where N: Decode,

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fn decode<__CodecInputEdqy>( __codec_input_edqy: &mut __CodecInputEdqy ) -> Result<GroupRotationInfo<N>, Error>where __CodecInputEdqy: Input,

Attempt to deserialise the value from input.
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fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self> ) -> Result<DecodeFinished, Error>where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory. Read more
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fn skip<I>(input: &mut I) -> Result<(), Error>where I: Input,

Attempt to skip the encoded value from input. Read more
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fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type. Read more
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impl<N> Encode for GroupRotationInfo<N>where N: Encode,

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fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding. Read more
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fn encode_to<__CodecOutputEdqy>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy )where __CodecOutputEdqy: Output + ?Sized,

Convert self to a slice and append it to the destination.
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fn encode(&self) -> Vec<u8, Global>

Convert self to an owned vector.
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fn using_encoded<R, F>(&self, f: F) -> Rwhere F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.
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fn encoded_size(&self) -> usize

Calculates the encoded size. Read more
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impl<N> PartialEq<GroupRotationInfo<N>> for GroupRotationInfo<N>where N: PartialEq<N>,

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fn eq(&self, other: &GroupRotationInfo<N>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<N> TypeInfo for GroupRotationInfo<N>where N: TypeInfo + 'static,

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type Identity = GroupRotationInfo<N>

The type identifying for which type info is provided. Read more
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fn type_info() -> Type<MetaForm>

Returns the static type identifier for Self.
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impl<N> EncodeLike<GroupRotationInfo<N>> for GroupRotationInfo<N>where N: Encode,

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impl<N> StructuralPartialEq for GroupRotationInfo<N>

Auto Trait Implementations§

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impl<N> RefUnwindSafe for GroupRotationInfo<N>where N: RefUnwindSafe,

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impl<N> Send for GroupRotationInfo<N>where N: Send,

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impl<N> Sync for GroupRotationInfo<N>where N: Sync,

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impl<N> Unpin for GroupRotationInfo<N>where N: Unpin,

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impl<N> UnwindSafe for GroupRotationInfo<N>where N: UnwindSafe,

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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Immutably borrows from an owned value. Read more
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Converts self into T using Into<T>. Read more
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Decode Self and consume all of the given input data. Read more
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Decode Self and consume all of the given input data. Read more
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Decode Self with the given maximum recursion depth and advance input by the number of bytes consumed. Read more
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