Connecting with subxt

subxt is a Rust library for interacting with Polkadot and Substrate-based chains, maintained by Parity Technologies.

Installation

Add subxt to your Cargo.toml:

[dependencies]
subxt = "0.50"
tokio = { version = "1", features = ["full"] }

Generating the metadata

subxt metadata --url wss://asset-hub.polkadot.rpc.deserve.network > metadata.scale

Connecting to the geo-steered endpoint

use subxt::{OnlineClient, PolkadotConfig};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let api = OnlineClient::<PolkadotConfig>::from_url(
        "wss://asset-hub.polkadot.rpc.deserve.network"
    ).await?;

    println!("Connected. Genesis hash: {:?}", api.genesis_hash());
    Ok(())
}

Connecting to a regional endpoint

use subxt::{OnlineClient, PolkadotConfig};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    // replace with your preferred regional endpoint
    let api = OnlineClient::<PolkadotConfig>::from_url(
        "wss://london.asset-hub.polkadot.rpc.deserve.network"
    ).await?;

    println!("Connected. Genesis hash: {:?}", api.genesis_hash());
    Ok(())
}

Available endpoints

Network	Endpoints
Polkadot Asset Hub	Link
Polkadot Coretime	Link