test.rs

mod block;

pub use crate::block::Block;
extern crate bincode;
mod hashable;
use proc_macro2;
pub use crate::hashable::Hashable;
use futures::prelude::*;
use libp2p::{
    PeerId,
    Swarm,
    NetworkBehaviour,
    identity,
    tokio_codec::{FramedRead,Framed, LinesCodec,BytesCodec}
};

pub struct Blockchain{

   pub blocks:Vec<Block>,
}
fn main() {
    env_logger::init();

    // Create a random PeerId
    let local_key = identity::Keypair::generate_ed25519();
    let local_peer_id = PeerId::from(local_key.public());
    println!("Local peer id: {:?}", local_peer_id);

    // Set up a an encrypted DNS-enabled TCP Transport over the Mplex and Yamux protocols
    let transport = libp2p::build_development_transport(local_key);

    // Create a Floodsub topic
    let floodsub_topic = libp2p::floodsub::TopicBuilder::new("chat").build();

    // We create a custom network behaviour that combines floodsub and mDNS.
    // In the future, we want to improve libp2p to make this easier to do.
    #[derive(NetworkBehaviour)]
    struct MyBehaviour<TSubstream: libp2p::tokio_io::AsyncRead + libp2p::tokio_io::AsyncWrite> {
        floodsub: libp2p::floodsub::Floodsub<TSubstream>,
        mdns: libp2p::mdns::Mdns<TSubstream>,
    }

    impl<TSubstream: libp2p::tokio_io::AsyncRead + libp2p::tokio_io::AsyncWrite> libp2p::core::swarm::NetworkBehaviourEventProcess<libp2p::mdns::MdnsEvent> for MyBehaviour<TSubstream> {
        fn inject_event(&mut self, event: libp2p::mdns::MdnsEvent) {
            match event {
                libp2p::mdns::MdnsEvent::Discovered(list) => {
                    for (peer, _) in list {
                        self.floodsub.add_node_to_partial_view(peer);
                    }
                },
                libp2p::mdns::MdnsEvent::Expired(list) => {
                    for (peer, _) in list {
                        if !self.mdns.has_node(&peer) {
                            self.floodsub.remove_node_from_partial_view(&peer);
                        }
                    }
                }
            }
        }
    }

    impl<TSubstream: libp2p::tokio_io::AsyncRead + libp2p::tokio_io::AsyncWrite> libp2p::core::swarm::NetworkBehaviourEventProcess<libp2p::floodsub::FloodsubEvent> for MyBehaviour<TSubstream> {
        // Called when `floodsub` produces an event.
        fn inject_event(&mut self, message: libp2p::floodsub::FloodsubEvent) {
            if let libp2p::floodsub::FloodsubEvent::Message(message) = message {
                println!("Received: '{:?}' from {:?}", String::from_utf8_lossy(&message.data), message.source);
            }
        }
    }

    // Create a Swarm to manage peers and events
    let mut swarm = {
        let mut behaviour = MyBehaviour {
            floodsub: libp2p::floodsub::Floodsub::new(local_peer_id.clone()),
            mdns: libp2p::mdns::Mdns::new().expect("Failed to create mDNS service"),
        };

        behaviour.floodsub.subscribe(floodsub_topic.clone());
        libp2p::Swarm::new(transport, behaviour, local_peer_id)
    };

    // Reach out to another node if specified
    if let Some(to_dial) = std::env::args().nth(1) {
        let dialing = to_dial.clone();
        match to_dial.parse() {
            Ok(to_dial) => {
                match libp2p::Swarm::dial_addr(&mut swarm, to_dial) {
                    Ok(_) => println!("Dialed {:?}", dialing),
                    Err(e) => println!("Dial {:?} failed: {:?}", dialing, e)
                }
            },
            Err(err) => println!("Failed to parse address to dial: {:?}", err),
        }
    } let stdin = tokio_stdin_stdout::stdin(0);
      let mut framed_stdin = FramedRead::new(stdin, LinesCodec::new());

    // Listen on all interfaces and whatever port the OS assigns
    libp2p::Swarm::listen_on(&mut swarm, "/ip4/0.0.0.0/tcp/0".parse().unwrap()).unwrap();

    // Kick it off
    let mut listening = false;
    tokio::run(futures::future::poll_fn(move || -> Result<_, ()> {
        loop {
            match framed_stdin.poll().expect("Error while polling stdin") {
                Async::Ready(Some(line)) => swarm.floodsub.publish(&floodsub_topic, line.as_bytes()),
                Async::Ready(None) => panic!("Stdin closed"),
                Async::NotReady => break,
            };
        }

        loop {
            match swarm.poll().expect("Error while polling swarm") {
                Async::Ready(Some(_)) => {

                },
                Async::Ready(None) | Async::NotReady => {
                    if !listening {
                        if let Some(a) = Swarm::listeners(&swarm).next() {
                            println!("Listening on {:?}", a);
                            listening = true;
                        }
                    }
                    break
                }
            }
        }

        Ok(Async::NotReady)
    }));
    let mut block = Block::new(0, vec![0; 32],vec![0;32], "Genesis block!".to_owned(),0, 0x00000fffffffffffffffffffffffffff);
    let h=block.hash();
    //block.hash_value=h;
   // println!("{:?}",&h);
   block.mining();
   println!("{:?}",&block);
   let mut prevhash=block.hash_value.clone();
let mut blckchain=Blockchain {
       blocks:vec![block],
   };
    
for i in 1..=10 {
    let mut block = Block::new(i,  vec![0; 32],prevhash, "new block!".to_owned(),0, 0x0000ffffffffffffffffffffffffffff);
    block.mining();
    println!("{:?}",&block);
    prevhash=block.hash_value.clone();
    let payload = serde_json::to_string(&block).unwrap();
    let bytes = bincode::serialize(&block).unwrap();
   // let stdin = tokio_stdin_stdout::stdin(0);
  // let stream: proc_macro2::TokenStream = payload.parse().unwrap();
  framed_stdin=FramedRead::new(payload, LinesCodec::new()); //here is the error please look at line 94,95
    // framed_stdin = Framed::new(bytes, BytesCodec::new());
    //print!("{:?}",payload);
    blckchain.blocks.push(block);
}
    
}