Module storage

Expand description

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 decode_storage_key_current and decode_storage_value_current to decode modern storage keys and values.
See encode_prefix to encode storage prefixes, and encode_storage_key to encode storage keys.

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.

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.
StorageValueDecodeError: An error returned trying to decode storage bytes.

IntoStorageKeys: This can be implemented for anything that can be converted into something implementing StorageKeys. It is implemented by default for tuples up to length 10, vectors and arrays (where the values all implement scale_encode::EncodeAsType).
StorageKeys: Since scale_encode::EncodeAsType is not dyn safe, this trait is used to iterate through and encode a set of keys.
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.

decode_storage_key: Decode a storage key, returning information about it.
decode_storage_key_current: Decode a storage key in a modern runtime, returning information about it.
decode_storage_key_with_info: Decode a storage key, returning information about it.
decode_storage_value: Decode a storage value.
decode_storage_value_current: Decode a storage value in a modern (V14-metadata-or-later) runtime.
decode_storage_value_with_info: Decode a storage value.
encode_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: 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_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_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.