Notes

tags: Move,Starcoin Web3 StarTrek source: Blackshear, Sam, Evan Cheng, David L Dill, Victor Gao, Ben Maurer, Todd Nowacki, Alistair Pott, et al. “Move: A Language With Programmable Resources,” n.d., 26.

tags: Starcoin Web3 StarTrek,Blockchain,Smart contracts

tags: Starcoin Web3 StarTrek,Account-Model Blockchain Systems We can create an account by wallet like MetaMask or StarMask, but I’m curious about how an account is created on the blockchain system. As a wallet has been embedded in the starcoin node, we can use it to create an account as follow: $ ./target/debug/starcoin -d ~/.starcoin -n dev account create -p my-pass { "ok": { "address": "0x2f1aeb63bd30d8eb841d6a941c5d6df3", "is_default": false, "is_readonly": false, "public_key": "0x91f79bdd9ced49332bf85b751d02339e05aff047c386d0c14b380d8519d2fb4b", "receipt_identifier": "stc1p9udwkcaaxrvwhpqad22pchtd7vy2276p" } } As above we can see our account has been created, and the address is: 0x2f1aeb63bd30d8eb841d6a941c5d6df3. We’ll find some files are created, if we check our local directory at ~/.starcoin/dev: ...

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tags: libp2p,Starcoin Web3 StarTrek source: https://docs.rs/libp2p/0.45.1/libp2p/tutorials/index.html Ping: Four necessary traits Identity: PeerId and corresponding Keypair Transport: send and receive bytes on the network. NetworkBehaviour: decode or encode the bytes from the Transport. Swarm: drives both a Transport and a NetworkBehaviour forward. use futures::StreamExt; use libp2p::ping::{Ping, PingConfig}; use libp2p::{identity, Multiaddr, PeerId, Swarm}; use std::error::Error; #[async_std::main] async fn main() -> Result<(), Box<dyn Error>> { // First we need to create a network identity. let local_key = identity::Keypair::generate_ed25519(); let local_peer_id = PeerId::from(local_key.public()); println!("Local peer id: {:?}", local_peer_id); // Then construct a transport: defines how to send bytes on the network. let transport = libp2p::development_transport(local_key).await?; // NetworkBehaviour defines what bytes to send on the network. let behaviour = Ping::new(PingConfig::new().with_keep_alive(true)); // Swarm connects transport and behaviour together: // // 1. Passing commands from NetworkBehaviour to the Transport. // 2. As well ass events from the Transport to the NetworkBehaviour. let mut swarm = Swarm::new(transport, behaviour, local_peer_id); swarm.listen_on("/ip4/0.0.0.0/tcp/0".parse()?)?; if let Some(addr) = std::env::args().nth(1) { let remote: Multiaddr = addr.parse()?; swarm.dial(remote)?; println!("Dialed {}", addr); } loop { match swarm.select_next_some().await { libp2p::swarm::SwarmEvent::NewListenAddr { listener_id: _, address, } => println!("Listening on {:?}", address), libp2p::swarm::SwarmEvent::Behaviour(event) => println!("{:?}", event), _ => {} } } Ok(()) }