pub fn hex(h: &Hash) -> StringExamples found in repository?
examples/single_round.rs (line 21)
3fn main() {
4 let config = Config::new(1); // f=1, needs 4 nodes
5 let mut engine = ConsensusEngine::new(config);
6
7 for i in 1..=4 {
8 let node = Node::new(i, 1000).expect("failed to create node");
9 engine.add_node(node);
10 }
11
12 println!("Running VRF-PBFT with 4 nodes (f=1)...\n");
13
14 // VRF selection is probabilistic, so retry until a round succeeds
15 loop {
16 match engine.run_round() {
17 Ok(block) => {
18 println!("Consensus reached on round {}!", engine.round());
19 println!(" Proposer: node {}", block.proposer);
20 println!(" Seed: {}", block.seed);
21 println!(" Prev hash: {}...", &hex(&block.prev_hash)[..16]);
22 println!(" Hash: {}...", &hex(&block.hash())[..16]);
23 println!("\nMessages exchanged: {}", engine.messages().len());
24 break;
25 }
26 Err(vrf_pbft::Error::NoProposer(r)) => {
27 println!("Round {}: no proposer elected, retrying...", r);
28 }
29 Err(vrf_pbft::Error::InsufficientVotes { needed, got }) => {
30 println!(
31 "Round {}: not enough votes ({}/{}), retrying...",
32 engine.round(),
33 got,
34 needed
35 );
36 }
37 Err(e) => {
38 eprintln!("Fatal error: {}", e);
39 std::process::exit(1);
40 }
41 }
42 }
43}