|
| 1 | +use hex::ToHex; |
| 2 | +use pallas_network::facades::{KeepAliveLoop, PeerClient, DEFAULT_KEEP_ALIVE_INTERVAL_SEC}; |
| 3 | +use pallas_network::miniprotocols::chainsync::{HeaderContent, NextResponse}; |
| 4 | +use pallas_network::miniprotocols::{ |
| 5 | + blockfetch, chainsync, handshake, keepalive, txsubmission, Point, PROTOCOL_N2N_BLOCK_FETCH, |
| 6 | + PROTOCOL_N2N_CHAIN_SYNC, PROTOCOL_N2N_HANDSHAKE, PROTOCOL_N2N_KEEP_ALIVE, PROTOCOL_N2N_TX_SUBMISSION, |
| 7 | +}; |
| 8 | +use pallas_network::multiplexer::{Bearer, Plexer}; |
| 9 | +use std::io; |
| 10 | +use std::net::ToSocketAddrs; |
| 11 | +use std::time::Duration; |
| 12 | +use structopt::StructOpt; |
| 13 | +use thiserror::Error; |
| 14 | +use tracing::debug; |
| 15 | + |
| 16 | +use crate::nodeclient::dumpblock::hash_utils::{extract_slot, header_hash}; |
| 17 | + |
| 18 | +mod hash_utils; |
| 19 | + |
| 20 | +#[derive(Error, Debug)] |
| 21 | +pub enum DumpBlockError { |
| 22 | + #[error("Invalid hex: {0}")] |
| 23 | + InvalidHex(#[from] hex::FromHexError), |
| 24 | + |
| 25 | + #[error("IO error: {0}")] |
| 26 | + Io(#[from] io::Error), |
| 27 | + |
| 28 | + #[error("Unable to resolve host")] |
| 29 | + UnableToResolveHost, |
| 30 | + |
| 31 | + #[error("Handshake error: {0}")] |
| 32 | + Handshake(String), |
| 33 | + |
| 34 | + #[error("Handshake rejected: {0:?}")] |
| 35 | + HandshakeRejected(String), |
| 36 | + |
| 37 | + #[error("Chain sync error: {0}")] |
| 38 | + ChainSync(#[from] chainsync::ClientError), |
| 39 | + |
| 40 | + #[error("Block fetch error: {0}")] |
| 41 | + BlockFetch(#[from] blockfetch::ClientError), |
| 42 | + |
| 43 | + #[error("Pallas traverse error: {0}")] |
| 44 | + PallasTraverse(#[from] pallas_traverse::Error), |
| 45 | + |
| 46 | + #[error("Intersection not found")] |
| 47 | + IntersectionNotFound, |
| 48 | + |
| 49 | + #[error("Unexpected await from chainsync")] |
| 50 | + UnexpectedAwait, |
| 51 | +} |
| 52 | + |
| 53 | +#[derive(Debug, StructOpt)] |
| 54 | +pub struct Args { |
| 55 | + #[structopt(long, help = "Slot number of the intersect point")] |
| 56 | + pub intersect_slot: u64, |
| 57 | + #[structopt(long, help = "Block hash of the intersect point (hex)")] |
| 58 | + pub intersect_hash: String, |
| 59 | + #[structopt(short, long, help = "cardano-node hostname to connect to")] |
| 60 | + pub host: String, |
| 61 | + #[structopt(short, long, default_value = "3001", help = "cardano-node port")] |
| 62 | + pub port: u16, |
| 63 | + #[structopt(long, default_value = "764824073", help = "network magic.")] |
| 64 | + pub network_magic: u64, |
| 65 | +} |
| 66 | + |
| 67 | +pub async fn run(args: Args) -> Result<(), DumpBlockError> { |
| 68 | + let point = Point::Specific(args.intersect_slot, hex::decode(&args.intersect_hash)?); |
| 69 | + |
| 70 | + let addr = format!("{}:{}", args.host, args.port) |
| 71 | + .to_socket_addrs()? |
| 72 | + .next() |
| 73 | + .ok_or(DumpBlockError::UnableToResolveHost)?; |
| 74 | + |
| 75 | + let bearer = Bearer::connect_tcp(addr).await?; |
| 76 | + let mut plexer = Plexer::new(bearer); |
| 77 | + |
| 78 | + let hs_channel = plexer.subscribe_client(PROTOCOL_N2N_HANDSHAKE); |
| 79 | + let cs_channel = plexer.subscribe_client(PROTOCOL_N2N_CHAIN_SYNC); |
| 80 | + let bf_channel = plexer.subscribe_client(PROTOCOL_N2N_BLOCK_FETCH); |
| 81 | + let ka_channel = plexer.subscribe_client(PROTOCOL_N2N_KEEP_ALIVE); |
| 82 | + let txsub_channel = plexer.subscribe_client(PROTOCOL_N2N_TX_SUBMISSION); |
| 83 | + |
| 84 | + let keepalive = keepalive::Client::new(ka_channel); |
| 85 | + |
| 86 | + let plexer = plexer.spawn(); |
| 87 | + |
| 88 | + let mut handshake = handshake::Client::new(hs_channel); |
| 89 | + let versions = handshake::n2n::VersionTable::v7_and_above(args.network_magic); |
| 90 | + let confirmation = handshake |
| 91 | + .handshake(versions) |
| 92 | + .await |
| 93 | + .map_err(|e| DumpBlockError::Handshake(format!("{e:?}")))?; |
| 94 | + |
| 95 | + let block_hex = match confirmation { |
| 96 | + handshake::Confirmation::Accepted(_, _) => { |
| 97 | + let keepalive = |
| 98 | + KeepAliveLoop::client(keepalive, Duration::from_secs(DEFAULT_KEEP_ALIVE_INTERVAL_SEC)).spawn(); |
| 99 | + let peer = PeerClient { |
| 100 | + plexer, |
| 101 | + keepalive, |
| 102 | + chainsync: chainsync::Client::new(cs_channel), |
| 103 | + blockfetch: blockfetch::Client::new(bf_channel), |
| 104 | + txsubmission: txsubmission::Client::new(txsub_channel), |
| 105 | + }; |
| 106 | + let PeerClient { |
| 107 | + mut chainsync, |
| 108 | + mut blockfetch, |
| 109 | + plexer, |
| 110 | + keepalive: _keepalive, |
| 111 | + txsubmission: _txsubmission, |
| 112 | + } = peer; |
| 113 | + let res = fetch_block(&mut chainsync, &mut blockfetch, point).await; |
| 114 | + plexer.abort().await; |
| 115 | + res |
| 116 | + } |
| 117 | + handshake::Confirmation::Rejected(reason) => { |
| 118 | + return Err(DumpBlockError::HandshakeRejected(format!("{reason:?}"))); |
| 119 | + } |
| 120 | + handshake::Confirmation::QueryReply(_) => { |
| 121 | + return Err(DumpBlockError::HandshakeRejected("Unexpected QueryReply".to_string())); |
| 122 | + } |
| 123 | + }?; |
| 124 | + |
| 125 | + println!("{block_hex}"); |
| 126 | + Ok(()) |
| 127 | +} |
| 128 | + |
| 129 | +async fn fetch_block( |
| 130 | + chainsync: &mut chainsync::Client<HeaderContent>, |
| 131 | + blockfetch: &mut blockfetch::Client, |
| 132 | + point: Point, |
| 133 | +) -> Result<String, DumpBlockError> { |
| 134 | + let (intersection, _) = chainsync.find_intersect(vec![point.clone()]).await?; |
| 135 | + |
| 136 | + let intersect_point = intersection.ok_or(DumpBlockError::IntersectionNotFound)?; |
| 137 | + debug!(?intersect_point, "intersected"); |
| 138 | + |
| 139 | + let block_point = loop { |
| 140 | + match chainsync.request_next().await? { |
| 141 | + NextResponse::RollForward(header, _) => break point_from_header(&header)?, |
| 142 | + NextResponse::RollBackward(_, _) => { |
| 143 | + debug!("received RollBackward, requesting next block"); |
| 144 | + continue; |
| 145 | + } |
| 146 | + NextResponse::Await => return Err(DumpBlockError::UnexpectedAwait), |
| 147 | + } |
| 148 | + }; |
| 149 | + |
| 150 | + let body = blockfetch.fetch_single(block_point).await?; |
| 151 | + |
| 152 | + Ok(body.encode_hex::<String>()) |
| 153 | +} |
| 154 | + |
| 155 | +fn point_from_header(header: &HeaderContent) -> Result<Point, DumpBlockError> { |
| 156 | + let slot = extract_slot(header)?; |
| 157 | + let hash = header_hash(header)?; |
| 158 | + Ok(Point::Specific(slot, hash)) |
| 159 | +} |
0 commit comments