How to Configure a Light Client

The Avail light client is heavily customizable with the most important parameters being exposed through its config file, the full config reference can be found here. The default config files for both light and fat client mode of operations can be found below.

Light client config example:

log_level = "info"
http_server_host = "127.0.0.1"
http_server_port = "7000"

libp2p_port = "37000"

full_node_rpc = ["http://127.0.0.1:9933"]
full_node_ws = ["ws://127.0.0.1:9944"]
app_id = 0
confidence = 92.0
avail_path = "avail_path"
prometheus_port = 9520
# Set to actual bootstrap peer ID and multiaddress
bootstraps = [["12D3KooWStAKPADXqJ7cngPYXd2mSANpdgh1xQ34aouufHA2xShz", "/ip4/127.0.0.1/tcp/39000"]]

For monitoring purposes, Prometheus is used.

Application client

The app client mode is used by individual apps to download, reconstruct and locally store relevant app data. Application data is primarily downloaded from the DHT, either by downloading individual block matrix rows or with per-cell approach, downloading relevant individual cells. RPC is (again) used as a fallback mechanisms, if DHT doesn't contain the data.

Downloaded and reconstructed data is exposed through a HTTP endpoint, with port configured by the http_server_port parameter.

App client mode is activated by setting the app_id to a value greater than 0.

Application client​

Application client