Module view_functions 

This module contains types and functions for working with View Functions.

• See RUNTIME_API_NAME and encode_view_function_inputs to obtain the Runtime API name and the encoded input data required to call a given View Function.
• See decode_view_function_response to decode View Function responses.
• See ViewFunctionTypeInfo for the underlying trait which extracts the relevant information.
• See ViewFunctionEntryInfo for a underlying trait which provides information about the available View Functions.

Structs

ViewFunctionInfo

Information about a View Function.

ViewFunctionInput

Information about a specific input value to a View Function.

Enums

ViewFunctionDecodeError

An error returned trying to decode a View Function responses.

ViewFunctionInfoError

An error returned trying to access View Function type information.

ViewFunctionInputsEncodeError

An error returned trying to encode View Function inputs.

Constants

RUNTIME_API_NAME

The default name of the Runtime API that you must call to query a View Function, where the arguments to this Runtime API can be encoded using encode_view_function_inputs.

Traits

EncodableValues

Since scale_encode::EncodeAsType is not dyn safe, this trait is used to iterate through and encode a set of values.

IntoEncodableValues

This can be implemented for anything that can be encoded in multiple steps into a set of values via scale_encode::EncodeAsType. The common use case is to encode a tuple of multiple types, step by step, into bytes. As well as tuples up to size 12, Implementations also exist for Vecs and arrays.

ViewFunctionEntryInfo

This can be implemented for anything capable of providing information about the available View Functions

ViewFunctionTypeInfo

This is implemented for anything capable of providing information about view functions (primarily metadata V16 and onwards).

Functions

decode_view_function_response

Decode a View Function response.

decode_view_function_response_with_info

Decode a View Function response.

encode_view_function_inputs

Encode the Runtime API input data necessary to call a View Function.

encode_view_function_inputs_to

Encode to a provided output Vec the Runtime API input data necessary to call a View Function.

encode_view_function_inputs_with_info_to

Encode to a provided output Vec the Runtime API input data necessary to call a View Function.

Type Aliases

ViewFunctionEntry

An entry denoting a pallet or a View Function name.