Substrate Client and associated logic.
Client is one of the most important components of Substrate. It mainly comprises two
- A database containing the blocks and chain state, generally referred to as
- A runtime environment, generally referred to as the
The former is typically provided by the
The latter typically requires passing one of:
LocalCallExecutorrunning the runtime locally.
RemoteCallExecutorthat will ask a third-party to perform the executions.
RemoteOrLocalCallExecutor, combination of the two.
Additionally, the fourth generic parameter of the
Client is a marker type representing
the ways in which the runtime can interface with the outside. Any code that builds a
is responsible for putting the right marker.
Tool for creating the genesis block.
Light client components.
Relevant client configuration items relevant for the client.
Call executor that executes methods locally, querying all required data from local backend.
Create an instance of in-memory client.
Create a client with the explicitly provided backend. This is useful for testing backend implementations.