Struct sp_mmr_primitives::OpaqueLeaf

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pub struct OpaqueLeaf(pub Vec<u8>);
Expand description

A helper type to allow using arbitrary SCALE-encoded leaf data in the RuntimeApi.

The point is to be able to verify MMR proofs from external MMRs, where we don’t know the exact leaf type, but it’s enough for us to have it SCALE-encoded.

Note the leaf type should be encoded in its compact form when passed through this type. See FullLeaf documentation for details.

This type does not implement SCALE encoding/decoding on purpose to avoid confusion, it would have to be SCALE-compatible with the concrete leaf type, but due to SCALE limitations it’s not possible to know how many bytes the encoding of concrete leaf type uses.

Tuple Fields§

§0: Vec<u8>

Raw bytes of the leaf type encoded in its compact form.

NOTE it DOES NOT include length prefix (like Vec<u8> encoding would).

Implementations§

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impl OpaqueLeaf

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pub fn from_leaf<T: FullLeaf>(leaf: &T) -> Self

Convert a concrete MMR leaf into an opaque type.

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pub fn from_encoded_leaf(encoded_leaf: Vec<u8>) -> Self

Create a OpaqueLeaf given raw bytes of compact-encoded leaf.

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pub fn try_decode<T: Decode>(&self) -> Option<T>

Attempt to decode the leaf into expected concrete type.

Trait Implementations§

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impl Clone for OpaqueLeaf

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fn clone(&self) -> OpaqueLeaf

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 Debug for OpaqueLeaf

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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<'de> Deserialize<'de> for OpaqueLeaf

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl FullLeaf for OpaqueLeaf

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fn using_encoded<R, F: FnOnce(&[u8]) -> R>(&self, f: F, _compact: bool) -> R

Encode the leaf either in its full or compact form. Read more
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impl PartialEq for OpaqueLeaf

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fn eq(&self, other: &OpaqueLeaf) -> 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 Serialize for OpaqueLeaf

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for OpaqueLeaf

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impl<T> Any for T
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Gets the TypeId of self. Read more
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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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Causes self to use its LowerExp implementation when Debug-formatted.
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Causes self to use its LowerHex implementation when Debug-formatted.
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