Struct ViewFunctionMetadata

pub struct ViewFunctionMetadata<'a> { /* private fields */ }

Metadata for the available View Functions. Currently these exist only at the pallet level, but eventually they could exist at the runtime level too.

Implementations

impl<'a> ViewFunctionMetadata<'a>

pub fn name(&self) -> &'a str

Method name.

pub fn query_id(&self) -> &'a [u8; 32]

Query ID. This is used to query the function. Roughly, it is constructed by doing twox_128(pallet_name) ++ twox_128("fn_name(fnarg_types) -> return_ty") .

pub fn docs(&self) -> &'a [String]

Method documentation.

pub fn inputs( &self, ) -> impl ExactSizeIterator<Item = &'a MethodParamMetadata> + use<'a>

Method inputs.

pub fn output_ty(&self) -> u32

Method return type.

pub fn hash(&self) -> [u8; 32]

Return a hash for the method. The query ID of a view function validates it to some degree, but only takes type names into account. This hash takes into account the actual shape of each argument and the return type.

Trait Implementations

impl<'a> Clone for ViewFunctionMetadata<'a>

fn clone(&self) -> ViewFunctionMetadata<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for ViewFunctionMetadata<'a>

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

Formats the value using the given formatter.

impl<'a> Copy for ViewFunctionMetadata<'a>