Network.Polkadot.Storage

Substrate uses a simple key-value data store implemented as a database-backed, modified Merkle tree.

Blockchains that are built with Substrate expose a remote procedure call (RPC) server that can be used to query runtime storage.

Documentation

type Storage = Map Text ModuleStorage

Runtime storage is a set of named modules.

type ModuleStorage = Map Text StorageEntry

Each module store data in a set of named entries.

fromMetadata

Arguments

:: Metadata

Runtime metadata (latest version).

-> Storage

Storage entities.

Create Storage abstraction from runtime metadata.

storageKey

Arguments

:: Storage

Storage entities.

-> Text

Module name.

-> Text

Storage method name.

-> [Argument]

Arguments (for mappings).

-> Maybe HexString

Raw storage key. If module or method was not found or wrong number of arguments - returns Nothing.

Create storage key for given parameters.