pub struct GrandpaJustification<Block: BlockT> {
    pub justification: GrandpaJustification<Block::Header>,
    /* private fields */
}
Expand description

A GRANDPA justification for block finality, it includes a commit message and an ancestry proof including all headers routing all precommit target blocks to the commit target block. Due to the current voting strategy the precommit targets should be the same as the commit target, since honest voters don’t vote past authority set change blocks.

This is meant to be stored in the db and passed around the network to other nodes, and are used by syncing nodes to prove authority set handoffs.

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§justification: GrandpaJustification<Block::Header>

The GRANDPA justification for block finality.

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impl<Block: BlockT> GrandpaJustification<Block>

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pub fn from_commit<C>( client: &Arc<C>, round: u64, commit: Commit<Block::Header> ) -> Result<Self, Error>where C: HeaderBackend<Block>,

Create a GRANDPA justification from the given commit. This method assumes the commit is valid and well-formed.

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pub fn decode_and_verify_finalizes( encoded: &[u8], finalized_target: (Block::Hash, NumberFor<Block>), set_id: u64, voters: &VoterSet<AuthorityId> ) -> Result<Self, ClientError>where NumberFor<Block>: BlockNumberOps,

Decode a GRANDPA justification and validate the commit and the votes’ ancestry proofs finalize the given block.

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pub fn verify( &self, set_id: u64, authorities: &AuthorityList ) -> Result<(), ClientError>where NumberFor<Block>: BlockNumberOps,

Validate the commit and the votes’ ancestry proofs.

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pub fn target(&self) -> (NumberFor<Block>, Block::Hash)

The target block number and hash that this justifications proves finality for.

Trait Implementations§

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impl<Block: Clone + BlockT> Clone for GrandpaJustification<Block>where Block::Header: Clone,

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fn clone(&self) -> GrandpaJustification<Block>

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<Block: Debug + BlockT> Debug for GrandpaJustification<Block>where Block::Header: Debug,

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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<Block: BlockT> Decode for GrandpaJustification<Block>where GrandpaJustification<Block::Header>: Decode, PhantomData<Block>: 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 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<Block: BlockT> Encode for GrandpaJustification<Block>where GrandpaJustification<Block::Header>: Encode, PhantomData<Block>: Encode,

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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 size_hint(&self) -> usize

If possible give a hint of expected size of the encoding. Read more
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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<Block: BlockT> From<GrandpaJustification<<Block as Block>::Header>> for GrandpaJustification<Block>

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fn from(justification: GrandpaJustification<Block::Header>) -> Self

Converts to this type from the input type.
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impl<Block: BlockT> Into<GrandpaJustification<<Block as Block>::Header>> for GrandpaJustification<Block>

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fn into(self) -> GrandpaJustification<Block::Header>

Converts this type into the (usually inferred) input type.
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impl<Block: PartialEq + BlockT> PartialEq<GrandpaJustification<Block>> for GrandpaJustification<Block>where Block::Header: PartialEq,

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fn eq(&self, other: &GrandpaJustification<Block>) -> 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<Block: BlockT> EncodeLike<GrandpaJustification<Block>> for GrandpaJustification<Block>where GrandpaJustification<Block::Header>: Encode, PhantomData<Block>: Encode,

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impl<Block: Eq + BlockT> Eq for GrandpaJustification<Block>where Block::Header: Eq,

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impl<Block: BlockT> StructuralEq for GrandpaJustification<Block>

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impl<Block: BlockT> StructuralPartialEq for GrandpaJustification<Block>

Auto Trait Implementations§

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impl<Block> RefUnwindSafe for GrandpaJustification<Block>where Block: RefUnwindSafe, <Block as Block>::Hash: RefUnwindSafe, <Block as Block>::Header: RefUnwindSafe, <<Block as Block>::Header as Header>::Number: RefUnwindSafe,

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impl<Block> Send for GrandpaJustification<Block>

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impl<Block> Sync for GrandpaJustification<Block>

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impl<Block> Unpin for GrandpaJustification<Block>where Block: Unpin, <Block as Block>::Hash: Unpin, <Block as Block>::Header: Unpin, <<Block as Block>::Header as Header>::Number: Unpin,

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impl<Block> UnwindSafe for GrandpaJustification<Block>where Block: UnwindSafe, <Block as Block>::Hash: UnwindSafe, <Block as Block>::Header: UnwindSafe, <<Block as Block>::Header as Header>::Number: UnwindSafe,

Blanket Implementations§

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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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Mutably borrows from an owned value. Read more
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Convert from a value of T into an equivalent instance of Option<Self>. Read more
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fn decode_all(input: &mut &[u8]) -> Result<T, Error>

Decode Self and consume all of the given input data. Read more
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fn decode_all_with_depth_limit(limit: u32, input: &mut &[u8]) -> Result<T, Error>

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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Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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Compare self to key and return true if they are equal.
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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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Returns the argument unchanged.

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