Crate smoldot_light

source ·
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Smoldot light client library.

This library provides an easy way to create a light client.

This light client is opinionated towards certain aspects: what it downloads, how much memory and CPU it is willing to consume, etc.

Usage

Initialization

In order to use the light client, call Client::new, passing an implementation of the platform::PlatformRef trait. See the documentation of the platform::PlatformRef trait for more information.

The Client contains two generic parameters:

  • An implementation of the platform::PlatformRef trait.
  • An opaque user data. If you do not use this, you can simply use ().

Adding a chain

After the client has been initialized, use Client::add_chain to ask the client to connect to said chain. See the documentation of AddChainConfig for information about what to provide.

Client::add_chain returns a ChainId, which identifies the chain within the Client. A Client can be thought of as a collection of chain connections, each identified by their ChainId, akin to a HashMap<ChainId, ...>.

A chain can be removed at any time using Client::remove_chain. This will cause the client to stop all connections and clean up its internal services. The ChainId is instantly considered as invalid as soon as the method is called.

JSON-RPC requests and responses

Once a chain has been added, one can send JSON-RPC requests using Client::json_rpc_request.

The request parameter of this function must be a JSON-RPC request in its text form. For example: {"id":53,"jsonrpc":"2.0","method":"system_name","params":[]}.

Calling Client::json_rpc_request queues the request in the internals of the client. Later, the client will process it.

Responses can be pulled by calling the AddChainSuccess::json_rpc_responses that is returned after a chain has been added.

Modules

Structs

Enums