Struct Metadata 

pub struct Metadata { /* private fields */ }

A cheaply clone-able representation of the runtime metadata received from a node.

Implementations

impl Metadata

pub fn pallet_by_name_err( &self, name: &str, ) -> Result<PalletMetadata<'_>, MetadataError>

Identical to metadata.pallet_by_name(), but returns an error if the pallet is not found.

pub fn pallet_by_index_err( &self, index: u8, ) -> Result<PalletMetadata<'_>, MetadataError>

Identical to metadata.pallet_by_index(), but returns an error if the pallet is not found.

pub fn runtime_api_trait_by_name_err( &self, name: &str, ) -> Result<RuntimeApiMetadata<'_>, MetadataError>

Identical to metadata.runtime_api_trait_by_name(), but returns an error if the trait is not found.

pub fn custom_value_by_name_err( &self, name: &str, ) -> Result<CustomValueMetadata<'_>, MetadataError>

Identical to metadata.custom().get(name), but returns an error if the trait is not found.

Methods from Deref<Target = Metadata>

pub fn types(&self) -> &PortableRegistry

Access the underlying type registry.

pub fn runtime_ty(&self) -> u32

The type ID of the Runtime type.

pub fn dispatch_error_ty(&self) -> Option<u32>

The type ID of the DispatchError type, if it exists.

pub fn extrinsic(&self) -> &ExtrinsicMetadata

Return details about the extrinsic format.

pub fn outer_enums(&self) -> OuterEnumsMetadata

Return details about the outer enums.

pub fn pallets(&self) -> impl ExactSizeIterator

An iterator over all of the available pallets.

pub fn pallet_by_index(&self, variant_index: u8) -> Option<PalletMetadata<'_>>

Access a pallet given its encoded variant index.

pub fn pallet_by_name(&self, pallet_name: &str) -> Option<PalletMetadata<'_>>

Access a pallet given its name.

pub fn runtime_api_traits(&self) -> impl ExactSizeIterator

An iterator over all of the runtime APIs.

pub fn runtime_api_trait_by_name( &self, name: &str, ) -> Option<RuntimeApiMetadata<'_>>

Access a runtime API trait given its name.

pub fn custom(&self) -> CustomMetadata<'_>

Returns custom user defined types

pub fn hasher(&self) -> MetadataHasher<'_>

Obtain a unique hash representing this metadata or specific parts of it.

pub fn type_hash(&self, id: u32) -> Option<[u8; 32]>

Get type hash for a type in the registry

Trait Implementations

impl Clone for Metadata

fn clone(&self) -> Metadata

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Metadata

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

Formats the value using the given formatter.

impl Decode for Metadata

fn decode<I>(input: &mut I) -> Result<Metadata, Error>

where I: Input,

Attempt to deserialise the value from input.

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.

fn skip<I>(input: &mut I) -> Result<(), Error>

where I: Input,

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl Deref for Metadata

type Target = Metadata

The resulting type after dereferencing.

fn deref(&self) -> &<Metadata as Deref>::Target

Dereferences the value.

impl From<Metadata> for Metadata

fn from(md: Metadata) -> Metadata

Converts to this type from the input type.

impl TryFrom<RuntimeMetadataPrefixed> for Metadata

type Error = TryFromError

The type returned in the event of a conversion error.

fn try_from( value: RuntimeMetadataPrefixed, ) -> Result<Metadata, <Metadata as TryFrom<RuntimeMetadataPrefixed>>::Error>

Performs the conversion.