Network.Polkadot.Storage.Key

When you use the Substrate RPC to access a storage item, you only need to provide the key associated with that item.

Documentation

data Argument where

General type wrapper for SCALE encodable storage index argument.

Constructors

Argument

Fields

• :: Encode a
• => a
• -> Argument

  Wrapped type should be encodable.

Instances

Encode Argument

Defined in Network.Polkadot.Storage.Key

Methods

put :: Putter Argument

type Hasher = Argument -> ByteString

Hasher is a function that hash given argument.

data StorageEntry

Entry type describe storage prefix for different storage entity types.

Constructors

PlainEntry ByteString

Simple storage type without arguments.

MapEntry (Argument -> ByteString)

Mapping with hashing for arguments.

DoubleMapEntry (Argument -> Argument -> ByteString)

Double map with two different hashers.

NMapEntry ([Argument] -> ByteString)

Map with array of hashers.

Instances

Show StorageEntry

Defined in Network.Polkadot.Storage.Key

Methods

showsPrec :: Int -> StorageEntry -> ShowS

show :: StorageEntry -> String

showList :: [StorageEntry] -> ShowS

newEntry

Arguments

:: Text

Storage prefix (module name).

-> StorageEntryMetadata

Storage key metadata, includes entry type, name, etc.

-> StorageEntry

Storage key generator.

Create storage key generator from metadata description.

getHasher :: StorageHasher -> Hasher