Crate subxt_metadata

A representation of the metadata provided by a substrate based node. This representation is optimized to be used by Subxt and related crates, and is independent of the different versions of metadata that can be provided from a node.

Typically, this will be constructed by either:

1. Calling Metadata::decode() given some metadata bytes obtained from a node (this uses codec::Decode).
2. Obtaining frame_metadata::RuntimeMetadataPrefixed, and then using .try_into() to convert it into Metadata.

Structs

• ConstantMetadata
  Metadata for a single constant.
• CustomMetadata
  Metadata of custom types with custom values, basically the same as frame_metadata::v15::CustomMetadata<PortableForm>>.
• CustomValueMetadata
  Basically the same as frame_metadata::v15::CustomValueMetadata<PortableForm>>, but borrowed.
• ExtrinsicMetadata
  Metadata for the extrinsic type.
• Metadata
  Node metadata. This can be constructed by providing some compatible frame_metadata which is then decoded into this. We aim to preserve all of the existing information in the incoming metadata while optimizing the format a little for Subxt’s use cases.
• MetadataHasher
  Obtain a hash representation of our metadata or some part of it. This is obtained by calling crate::Metadata::hasher().
• OuterEnumsMetadata
  Metadata for the outer enums.
• PalletMetadata
  Metadata for a specific pallet.
• RuntimeApiMetadata
  Metadata for the available runtime APIs.
• RuntimeApiMethodMetadata
  Metadata for a single runtime API method.
• RuntimeApiMethodParamMetadata
  Metadata for a single input parameter to a runtime API method.
• SignedExtensionMetadata
  Metadata for the signed extensions used by extrinsics.
• StorageEntryMetadata
  Metadata for a single storage entry.
• StorageMetadata
  Metadata for the storage entries in a pallet.

Enums

• StorageEntryModifier
  Is the storage entry optional, or does it have a default value.
• StorageEntryType
  The type of a storage entry.
• StorageHasher
  Hasher used by storage maps.
• TryFromError
  An error emitted if something goes wrong converting frame_metadata types into crate::Metadata.