Module storage 

This module contains functions for decoding storage keys and values.

• See decode_storage_key and decode_storage_value to decode storage keys or values from modern or historic runtimes.
• See encode_storage_key_prefix to encode storage prefixes, and encode_storage_key to encode storage keys.
• See StorageTypeInfo for the underlying trait which provides storage entry information.
• See StorageEntryInfo for a underlying trait which provides information about the available storage entries.

Structs

StorageInfo

Information about a storage entry.

StorageKey

Details about a storage key.

StorageKeyInfo

Information about a single key within a storage entry.

StorageKeyPart

The decoded representation of a storage key.

StorageKeyPartValue

Information about the value contained within a storage key part hash.

Enums

StorageHasher

Hasher used by storage maps

StorageInfoError

An error returned trying to access storage type information.

StorageKeyDecodeError

An error returned trying to decode storage bytes.

StorageKeyEncodeError

An error returned trying to encode storage keys.

StorageKeyValueDecodeError

An error returned trying to decode the values in storage keys

StorageValueDecodeError

An error returned trying to decode storage bytes.

Traits

DecodableValues

Implementors of this trait are capable of decoding multiple values from bytes into an output type such as a tuple or fixed size array.

EncodableValues

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

IntoDecodableValues

This can be implemented for any type that can be decoded into in multiple steps via scale_decode::DecodeAsType. The common use case is to decode some sets of bytes into a tuple of multiple types, step by step. As well as tuples up to size 12, Implementations also exist and arrays.

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.

StorageEntryInfo

This can be implemented for anything capable of providing information about the available Storage Entries

StorageTypeInfo

This is implemented for all metadatas exposed from frame_metadata and is responsible for extracting the type IDs and related info needed to decode storage entries.

Functions

decode_default_storage_value_with_info

Decode the default storage value given some StorageInfo.

decode_storage_key

Decode a storage key, returning information about it.

decode_storage_key_values

Attempt to decode the values attached to parts of a storage key into the provided output type. decode_storage_key and related functions take a storage key and return information (in the form of StorageKey) which describes each of the parts of the key.

decode_storage_key_with_info

Decode a storage key, returning information about it.

decode_storage_value

Decode a storage value.

decode_storage_value_with_info

Decode a storage value.

encode_storage_key

Encode a complete storage key for a given pallet and storage entry and a set of keys that are each able to be encoded via scale_encode::EncodeAsType.

encode_storage_key_prefix

Encode a storage key prefix from a pallet name and storage entry name. This prefix is the first 32 bytes of any storage key which comes from a pallet, and is essentially twox_128(pallet_name) + twox_128(storage_entry_name).

encode_storage_key_suffix

Encode the end part of a storage key (ie everything except for the prefix that can be encoded via encode_storage_key_prefix) for a given pallet and storage entry and a set of keys that are each able to be encoded via scale_encode::EncodeAsType.

encode_storage_key_suffix_to

Encode the end part of a storage key (ie everything except for the prefix that can be encoded via encode_storage_key_prefix) for a given pallet and storage entry and a set of keys that are each able to be encoded via scale_encode::EncodeAsType.

encode_storage_key_suffix_with_info_to

Encode the end part of a storage key (ie everything except for the prefix that can be encoded via encode_storage_key_prefix) for a given pallet and storage entry and a set of keys that are each able to be encoded via scale_encode::EncodeAsType.

encode_storage_key_to

Encode a complete storage key for a given pallet and storage entry and a set of keys that are each able to be encoded via scale_encode::EncodeAsType.

encode_storage_key_with_info

Encode a complete storage key for a given pallet and storage entry and a set of keys that are each able to be encoded via scale_encode::EncodeAsType.

encode_storage_key_with_info_to

Encode a complete storage key for a given pallet and storage entry and a set of keys that are each able to be encoded via scale_encode::EncodeAsType. Write the response to the provided Vec.

Type Aliases

StorageEntry

An entry denoting a pallet or a constant name.