btlightning 0.2.13

Python

pip install btlightning

from btlightning import Lightning

client = Lightning(wallet_hotkey="5GrwvaEF...")
client.set_python_signer(my_signer_callback)
client.initialize_connections([
    {"hotkey": "5FHneW46...", "ip": "192.168.1.1", "port": 8443}
])
response = client.query_axon(
    {"hotkey": "5FHneW46...", "ip": "192.168.1.1", "port": 8443},
    {"synapse_type": "MyQuery", "data": {"key": "value"}}
)

Rust

[dependencies]
btlightning = { version = "0.1", features = ["subtensor"] }

With the subtensor feature, the client discovers miners from the metagraph and keeps connections in sync automatically:

use btlightning::{LightningClient, LightningClientConfig, Sr25519Signer, MetagraphMonitorConfig};

let config = LightningClientConfig {
    metagraph: Some(MetagraphMonitorConfig::finney(YOUR_NETUID)),
    ..Default::default()
};
let mut client = LightningClient::with_config("5GrwvaEF...".into(), config)?;
client.set_signer(Box::new(Sr25519Signer::from_seed(seed)));
client.initialize_connections(vec![]).await?;

Without subtensor, pass miner addresses directly:

use btlightning::{LightningClient, Sr25519Signer, QuicAxonInfo};

let mut client = LightningClient::new("5GrwvaEF...".into());
client.set_signer(Box::new(Sr25519Signer::from_seed(seed)));
client.initialize_connections(vec![
    QuicAxonInfo::new("5FHneW46...".into(), "192.168.1.1".into(), 8443, 4)
]).await?;

Query a single miner by axon info and deserialize the response:

use btlightning::QuicRequest;
use serde::{Serialize, Deserialize};

#[derive(Serialize)]
struct MyQuery { prompt: String }

#[derive(Deserialize)]
struct MyResult { answer: String }

let request = QuicRequest::from_typed("MyQuery", &MyQuery { prompt: "hello".into() })?;
let response = client.query_axon(axon_info, request).await?.into_result()?;
let result: MyResult = response.deserialize_data()?;

Fan out to every QUIC miner on the subnet concurrently:

use std::sync::Arc;
use tokio::task::JoinSet;

let client = Arc::new(client);
let miners = metagraph.quic_miners();
let mut tasks = JoinSet::new();
for miner in miners {
    let req = QuicRequest::from_typed("MyQuery", &MyQuery { prompt: "hello".into() })?;
    let client = Arc::clone(&client);
    tasks.spawn(async move {
        (miner.hotkey.clone(), client.query_axon(miner, req).await)
    });
}
while let Some(Ok((hotkey, result))) = tasks.join_next().await {
    match result {
        Ok(resp) => { /* handle response from hotkey */ }
        Err(e) => { /* miner failed */ }
    }
}

Flood defense

The server applies two filters at the quinn::Incoming boundary, before any per-connection state is allocated. Both are operator-configurable on LightningServerConfig.

Observability:

• info! Initial source-address allowlist resolution: N allowed IPs on startup
• info! Refreshed source-address allowlist: N allowed IPs per refresh
• warn! source-address allowlist is empty under enforce_source_allowlist=true; ALL connections will be silently dropped if the resolver returns empty or errors while enforcement is on
• info! QUIC address validation enabled -- all clients must complete a Retry round-trip on startup when require_address_validation is on
• LightningServer::get_allowed_source_count() returns the size of the cached allowlist for embedding in operator dashboards

Pre-flight numbers, measured locally with a quinn-driven flood at concurrency 64 over 10s:

Address validation alone provides limited mitigation against attackers using real reachable source IPs (the Retry round-trip completes); it is decisive against spoofed-source floods. Source allowlist enforcement reduces application-layer cost on flood traffic to zero. Both together provide defense in depth across the metagraph cold-start and resolver-failure windows.

This filter does not reduce inbound bandwidth or kernel UDP buffer pressure. Operators on saturated uplinks must combine these with upstream scrubbing or a kernel-level allowlist (e.g. nftables).

Build from source

cargo build -p btlightning
maturin develop --manifest-path crates/btlightning-py/Cargo.toml

Performance

Benchmarked on Apple Silicon (M-series), macOS, loopback networking. Echo handler returns input unchanged. Connection setup includes first request-response round trip. Lightning authenticates once at connection time and amortizes over all subsequent requests; bittensor signs and verifies every request. Bittensor payloads are base64-encoded (JSON has no binary type), adding ~33% wire overhead beyond the nominal payload size. Source: benchmarks/.

Color	System
	bittensor
	lightning (Python)
	lightning (Rust)

[!NOTE] Charts use log10 scale. Refer to the tables below for raw values.

Latency p50

---
config:
    xyChart:
        plotReservedSpacePercent: 60
    themeVariables:
        xyChart:
            backgroundColor: "#000000"
            plotColorPalette: "#808080, #FF8C00, #FFE000"
            titleColor: "#ffffff"
            xAxisLabelColor: "#aaaaaa"
            xAxisTitleColor: "#cccccc"
            xAxisTickColor: "#666666"
            xAxisLineColor: "#444444"
            yAxisLabelColor: "#aaaaaa"
            yAxisTitleColor: "#cccccc"
            yAxisTickColor: "#666666"
            yAxisLineColor: "#444444"
---
xychart-beta
    x-axis ["256B", "1KB", "10KB", "100KB", "1MB"]
    y-axis "log10(us)" 0 --> 5
    bar "bittensor" [4.39, 4.38, 4.39, 4.42, 4.61]
    bar "lightning (Python)" [1.90, 1.90, 2.36, 3.27, 4.31]
    bar "lightning (Rust)" [1.70, 1.70, 2.04, 2.84, 3.87]

Throughput (req/s)

---
config:
    xyChart:
        plotReservedSpacePercent: 60
    themeVariables:
        xyChart:
            backgroundColor: "#000000"
            plotColorPalette: "#FFE000, #FF8C00, #808080"
            titleColor: "#ffffff"
            xAxisLabelColor: "#aaaaaa"
            xAxisTitleColor: "#cccccc"
            xAxisTickColor: "#666666"
            xAxisLineColor: "#444444"
            yAxisLabelColor: "#aaaaaa"
            yAxisTitleColor: "#cccccc"
            yAxisTickColor: "#666666"
            yAxisLineColor: "#444444"
---
xychart-beta
    x-axis ["256B", "1KB", "10KB", "100KB", "1MB"]
    y-axis "log10(req/s)" 0 --> 5
    bar "lightning (Rust)" [4.92, 4.84, 4.27, 3.26, 2.26]
    bar "lightning (Python)" [4.55, 4.42, 3.83, 2.94, 1.94]
    bar "bittensor" [1.61, 1.61, 1.60, 1.57, 1.40]