TrySubxt

main.rs

use subxt::{Client, ClientBuilder, system::System, balances::Balances};
use tokio::runtime::Runtime as TokioRuntime;
use futures::{Future, Stream};
use node_runtime::{Runtime as RuntimeT, SignedExtra};
use srml_system::Trait;
use balances::Trait as BalancesTrait;
fn main() {

    let mut rt = TokioRuntime::new().unwrap();
    let client = ClientBuilder::<Runtime>::new().set_url(url::Url::parse("ws://127.0.0.1:9944").unwrap()).build();
    let client = rt.block_on(client).unwrap();
    let stream = rt.block_on(client.subscribe_blocks()).unwrap();

    rt.block_on(stream.for_each(|b| {
        println!("block: {:?}", b);
        Ok(())
    }));
}

#[derive(Clone, PartialEq, Eq, Debug)]
pub struct Runtime;

impl System for Runtime {
    type Index = <RuntimeT as Trait>::Index;
    type BlockNumber = <RuntimeT as Trait>::BlockNumber;
    type Hash = <RuntimeT as Trait>::Hash;
    type Hashing = <RuntimeT as Trait>::Hashing;
    type Address = <RuntimeT as Trait>::AccountId;
    type AccountId = <RuntimeT as Trait>::AccountId;
    // type Lookup = <RuntimeT as Trait>::Lookup;
    type Header = <RuntimeT as Trait>::Header;
    // type Event = <RuntimeT as Trait>::Event;
    // type SignedExtra = SignedExtra;
}

impl Balances for Runtime {
    type Balance = <RuntimeT as BalancesTrait>::Balance;
}

[package]
name = "try-out-subxt"
version = "0.1.0"
authors = ["Andrew Plaza [email protected]"]
edition = "2018"

See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
subxt = { git = "https://github.com/paritytech/substrate-subxt", branch = "master", package = "substrate-subxt" }
futures = "0.1.29"
tokio = "0.1"
url = "1.7"
node-runtime = { git = "https://github.com/paritytech/substrate", branch = "master", package = "node-runtime" }
srml-system = { git = "https://github.com/paritytech/substrate/", package = "srml-system", branch="master"}
balances = { package = "srml-balances", git = "https://github.com/paritytech/substrate/", default_features = false }