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Struct sp_consensus_beefy::Commitment

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pub struct Commitment<TBlockNumber> {
    pub payload: Payload,
    pub block_number: TBlockNumber,
    pub validator_set_id: ValidatorSetId,
}
Expand description

A commitment signed by GRANDPA validators as part of BEEFY protocol.

The commitment contains a payload extracted from the finalized block at height block_number. GRANDPA validators collect signatures on commitments and a stream of such signed commitments (see SignedCommitment) forms the BEEFY protocol.

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§payload: Payload

A collection of payloads to be signed, see Payload for details.

One of the payloads should be some form of cumulative representation of the chain (think MMR root hash). Additionally one of the payloads should also contain some details that allow the light client to verify next validator set. The protocol does not enforce any particular format of this data, nor how often it should be present in commitments, however the light client has to be provided with full validator set whenever it performs the transition (i.e. importing first block with validator_set_id incremented).

§block_number: TBlockNumber

Finalized block number this commitment is for.

GRANDPA validators agree on a block they create a commitment for and start collecting signatures. This process is called a round. There might be multiple rounds in progress (depending on the block choice rule), however since the payload is supposed to be cumulative, it is not required to import all commitments. BEEFY light client is expected to import at least one commitment per epoch, but is free to import as many as it requires.

§validator_set_id: ValidatorSetId

BEEFY validator set supposed to sign this commitment.

Validator set is changing once per epoch. The Light Client must be provided by details about the validator set whenever it’s importing first commitment with a new validator_set_id. Validator set data MUST be verifiable, for instance using payload information.

Trait Implementations§

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impl<TBlockNumber: Clone> Clone for Commitment<TBlockNumber>

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fn clone(&self) -> Commitment<TBlockNumber>

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<TBlockNumber: Debug> Debug for Commitment<TBlockNumber>

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

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

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

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<TBlockNumber> Encode for Commitment<TBlockNumber>
where TBlockNumber: 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: Output + ?Sized>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy, )

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

Convert self to an owned vector.
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fn using_encoded<R, F>(&self, f: F) -> R
where 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<TBlockNumber> Ord for Commitment<TBlockNumber>
where TBlockNumber: Ord,

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fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl<TBlockNumber: PartialEq> PartialEq for Commitment<TBlockNumber>

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fn eq(&self, other: &Commitment<TBlockNumber>) -> 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<TBlockNumber> PartialOrd for Commitment<TBlockNumber>
where TBlockNumber: Ord,

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fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl<TBlockNumber> TypeInfo for Commitment<TBlockNumber>
where TBlockNumber: TypeInfo + 'static,

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type Identity = Commitment<TBlockNumber>

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

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

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impl<TBlockNumber: Eq> Eq for Commitment<TBlockNumber>

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impl<TBlockNumber> StructuralPartialEq for Commitment<TBlockNumber>

Auto Trait Implementations§

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impl<TBlockNumber> Freeze for Commitment<TBlockNumber>
where TBlockNumber: Freeze,

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impl<TBlockNumber> RefUnwindSafe for Commitment<TBlockNumber>
where TBlockNumber: RefUnwindSafe,

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impl<TBlockNumber> Send for Commitment<TBlockNumber>
where TBlockNumber: Send,

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impl<TBlockNumber> Sync for Commitment<TBlockNumber>
where TBlockNumber: Sync,

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impl<TBlockNumber> Unpin for Commitment<TBlockNumber>
where TBlockNumber: Unpin,

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impl<TBlockNumber> UnwindSafe for Commitment<TBlockNumber>
where TBlockNumber: UnwindSafe,

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where T: 'static + ?Sized,

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Gets the TypeId of self. Read more
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Immutably borrows from an owned value. Read more
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🔬This is a nightly-only experimental API. (clone_to_uninit)
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Compare self to key and return their ordering.
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