A lightweight command-line diagnostic tool for probing libp2p peers over QUIC. It dials a target multiaddress, runs the identify protocol, and prints the remote peer's identity information to stdout.

What It Does

Generates a throwaway Ed25519 keypair as the local identity
Dials the specified peer over QUIC
Waits for the remote peer to respond with an Identify message (up to 20 seconds)
Prints the peer's identity details and exits

Output

On success, the tool prints the remote peer's:

Peer ID
Protocol version
Agent version
Observed address
Listen addresses
Supported protocols
Public key type

Diagnostic/progress messages (dialing, connection events, ping events) are written to stderr, while the final identify result is written to stdout.

Usage

cargo run -- /ip4/<node_public_ip>/udp/<swarm_port>/quic-v1

Example

cargo run -- /ip4/185.181.228.122/udp/31000/quic-v1
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
     Running `target/debug/quic_identify_probe /ip4/185.181.228.122/udp/31000/quic-v1`
Local peer id: 12D3KooWCKKV5RFmb1CpAXC1Zgh9NG7QERXKCaStcPT86Grppf3t
Dialing: /ip4/185.181.228.122/udp/31000/quic-v1
Connection established with 12D3KooWPrCH6vE2esBujTZXkxGCvuSUP1vqUpXN9aRTZxEKWcco via Dialer { address: /ip4/185.181.228.122/udp/31000/quic-v1, role_override: Dialer, port_use: Reuse }
Identify event: Sent { connection_id: ConnectionId(1), peer_id: PeerId("12D3KooWPrCH6vE2esBujTZXkxGCvuSUP1vqUpXN9aRTZxEKWcco") }
Ping event: Event { peer: PeerId("12D3KooWPrCH6vE2esBujTZXkxGCvuSUP1vqUpXN9aRTZxEKWcco"), connection: ConnectionId(1), result: Err(Unsupported) }
=== Identify::Received ===
peer_id: 12D3KooWPrCH6vE2esBujTZXkxGCvuSUP1vqUpXN9aRTZxEKWcco
protocol_version: /logos-blockchain-devnet/identify/1.0.0
agent_version: rust-libp2p/0.46.0
observed_addr: /ip4/10.64.0.6/udp/33290/quic-v1
listen_addrs:
  /ip4/185.181.228.122/udp/31000/quic-v1
  /ip4/127.0.0.1/udp/31000/quic-v1
  /ip4/10.42.14.93/udp/31000/quic-v1
protocols:
  /meshsub/1.0.0
  /ipfs/id/push/1.0.0
  /libp2p/autonat/2/dial-request
  /logos-blockchain-devnet/kad/1.0.0
  /meshsub/1.1.0
  /logos-blockchain-devnet/chainsync/1.0.0
  /ipfs/id/1.0.0
  /meshsub/1.2.0
public_key: present (Ed25519)