Added some crazy AI generated ideas, as a brainstorming exercise.
This commit is contained in:
Dave
429
examples/run_oracle_demo.rs
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429
examples/run_oracle_demo.rs
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use std::collections::{BTreeMap, HashMap, HashSet};
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use std::sync::{Arc, Mutex};
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use std::thread;
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use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
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/// A runnable demonstration of the BFT-CRDT Oracle Network
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///
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/// This example shows:
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/// 1. Multiple oracle nodes submitting prices independently
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/// 2. Byzantine oracles trying to manipulate prices
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/// 3. Network partitions and healing
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/// 4. Real-time price aggregation without consensus
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///
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/// Run with: cargo run --example run_oracle_demo
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// ============ Core Types ============
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#[derive(Debug, Clone, Hash, Eq, PartialEq)]
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struct OracleId(String);
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#[derive(Debug, Clone, Hash, Eq, PartialEq)]
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struct AssetPair(String);
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#[derive(Debug, Clone)]
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struct PriceAttestation {
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id: String,
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oracle_id: OracleId,
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asset_pair: AssetPair,
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price: u128,
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confidence: u8,
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timestamp: u64,
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sources: Vec<DataSource>,
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}
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#[derive(Debug, Clone)]
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struct DataSource {
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name: String,
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price: u128,
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volume: u128,
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}
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// ============ Simple CRDT Implementation ============
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#[derive(Clone)]
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struct OracleNetworkCRDT {
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attestations: HashMap<String, PriceAttestation>,
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oracle_scores: HashMap<OracleId, f64>,
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}
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impl OracleNetworkCRDT {
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fn new() -> Self {
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Self {
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attestations: HashMap::new(),
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oracle_scores: HashMap::new(),
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}
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}
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fn submit_attestation(&mut self, attestation: PriceAttestation) {
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self.attestations
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.insert(attestation.id.clone(), attestation.clone());
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// Update oracle score
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let score = self
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.oracle_scores
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.entry(attestation.oracle_id.clone())
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.or_insert(0.5);
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*score = (*score * 0.95) + 0.05; // Simple reputation update
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}
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fn merge(&mut self, other: &Self) {
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// Merge attestations
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for (id, attestation) in &other.attestations {
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if !self.attestations.contains_key(id) {
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self.attestations.insert(id.clone(), attestation.clone());
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}
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}
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// Merge oracle scores
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for (oracle_id, score) in &other.oracle_scores {
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self.oracle_scores.insert(oracle_id.clone(), *score);
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}
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}
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fn get_aggregate_price(
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&self,
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asset_pair: &AssetPair,
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max_age: u64,
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) -> Option<(u128, u8, usize)> {
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let now = timestamp();
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let min_time = now.saturating_sub(max_age);
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let mut prices = Vec::new();
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for attestation in self.attestations.values() {
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if attestation.asset_pair == *asset_pair && attestation.timestamp >= min_time {
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let weight = self
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.oracle_scores
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.get(&attestation.oracle_id)
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.unwrap_or(&0.5);
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prices.push((attestation.price, attestation.confidence, *weight));
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}
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}
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if prices.is_empty() {
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return None;
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}
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// Remove outliers using simple IQR method
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prices.sort_by_key(|(price, _, _)| *price);
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let q1_idx = prices.len() / 4;
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let q3_idx = 3 * prices.len() / 4;
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if prices.len() > 4 {
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let q1 = prices[q1_idx].0;
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let q3 = prices[q3_idx].0;
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let iqr = q3.saturating_sub(q1);
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let lower = q1.saturating_sub(iqr * 3 / 2);
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let upper = q3.saturating_add(iqr * 3 / 2);
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prices.retain(|(price, _, _)| *price >= lower && *price <= upper);
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}
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// Calculate weighted average
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let mut total_weight = 0.0;
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let mut weighted_sum = 0.0;
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let mut confidence_sum = 0.0;
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for (price, confidence, weight) in &prices {
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let w = (*confidence as f64 / 100.0) * weight;
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weighted_sum += *price as f64 * w;
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confidence_sum += *confidence as f64 * w;
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total_weight += w;
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}
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let avg_price = (weighted_sum / total_weight) as u128;
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let avg_confidence = (confidence_sum / total_weight) as u8;
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Some((avg_price, avg_confidence, prices.len()))
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}
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}
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// ============ Oracle Node ============
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struct OracleNode {
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id: OracleId,
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crdt: Arc<Mutex<OracleNetworkCRDT>>,
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is_byzantine: bool,
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base_price: u128,
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}
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impl OracleNode {
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fn new(id: String, is_byzantine: bool) -> Self {
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Self {
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id: OracleId(id),
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crdt: Arc::new(Mutex::new(OracleNetworkCRDT::new())),
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is_byzantine,
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base_price: 2500_000_000, // $2500 with 6 decimals
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}
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}
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fn submit_price(&self) {
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let price = if self.is_byzantine {
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// Byzantine nodes try to manipulate
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self.base_price * 120 / 100 // 20% higher
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} else {
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// Honest nodes add realistic variance
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let variance = (rand() * 0.02 - 0.01) as f64;
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((self.base_price as f64) * (1.0 + variance)) as u128
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};
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let attestation = PriceAttestation {
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id: format!("{}_{}", self.id.0, timestamp()),
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oracle_id: self.id.clone(),
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asset_pair: AssetPair("ETH/USD".to_string()),
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price,
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confidence: if self.is_byzantine { 50 } else { 95 },
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timestamp: timestamp(),
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sources: vec![
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DataSource {
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name: "Binance".to_string(),
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price,
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volume: 1000_000_000,
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},
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DataSource {
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name: "Coinbase".to_string(),
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price: price + 1_000_000, // Slight difference
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volume: 800_000_000,
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},
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],
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};
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let mut crdt = self.crdt.lock().unwrap();
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crdt.submit_attestation(attestation);
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}
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}
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// ============ Network Simulation ============
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struct NetworkSimulator {
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nodes: Vec<Arc<OracleNode>>,
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partitioned: Arc<Mutex<bool>>,
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}
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impl NetworkSimulator {
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fn new() -> Self {
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let mut nodes = Vec::new();
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// Create 5 honest nodes
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for i in 1..=5 {
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nodes.push(Arc::new(OracleNode::new(format!("honest_{}", i), false)));
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}
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// Create 2 Byzantine nodes
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for i in 1..=2 {
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nodes.push(Arc::new(OracleNode::new(format!("byzantine_{}", i), true)));
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}
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Self {
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nodes,
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partitioned: Arc::new(Mutex::new(false)),
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}
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}
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fn run(&self, duration: Duration) {
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println!("🚀 Starting BFT-CRDT Oracle Network Demo");
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println!("=========================================");
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println!("📊 Network: {} nodes ({} Byzantine)", self.nodes.len(), 2);
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println!("⏱️ Duration: {:?}\n", duration);
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let start = Instant::now();
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// Spawn oracle threads
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let handles: Vec<_> = self
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.nodes
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.iter()
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.map(|node| {
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let node_clone = Arc::clone(node);
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thread::spawn(move || {
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while start.elapsed() < duration {
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node_clone.submit_price();
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thread::sleep(Duration::from_millis(1000));
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}
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})
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})
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.collect();
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// Spawn network propagation thread
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let nodes_clone = self.nodes.clone();
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let partitioned_clone = Arc::clone(&self.partitioned);
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let propagation_handle = thread::spawn(move || {
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while start.elapsed() < duration {
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let is_partitioned = *partitioned_clone.lock().unwrap();
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// Propagate between nodes
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for i in 0..nodes_clone.len() {
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for j in 0..nodes_clone.len() {
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if i != j {
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// Skip if partitioned
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if is_partitioned && ((i < 3 && j >= 3) || (i >= 3 && j < 3)) {
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continue;
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}
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let crdt1 = nodes_clone[i].crdt.lock().unwrap();
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let mut crdt2 = nodes_clone[j].crdt.lock().unwrap();
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crdt2.merge(&*crdt1);
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}
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}
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}
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thread::sleep(Duration::from_millis(100));
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}
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});
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// Main monitoring loop
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let mut last_partition = Instant::now();
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while start.elapsed() < duration {
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thread::sleep(Duration::from_secs(2));
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// Print current state
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self.print_network_state();
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// Simulate network partition every 10 seconds
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if last_partition.elapsed() > Duration::from_secs(10) {
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let mut partitioned = self.partitioned.lock().unwrap();
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*partitioned = !*partitioned;
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if *partitioned {
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println!("\n⚠️ NETWORK PARTITION ACTIVE - Nodes split into two groups");
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} else {
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println!("\n✅ NETWORK PARTITION HEALED - All nodes can communicate");
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}
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last_partition = Instant::now();
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}
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}
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// Wait for threads
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for handle in handles {
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handle.join().unwrap();
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}
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propagation_handle.join().unwrap();
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// Print final statistics
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self.print_final_stats();
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}
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fn print_network_state(&self) {
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println!("\n📈 Current Network State:");
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println!("------------------------");
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// Get price from each node's perspective
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let mut prices = Vec::new();
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for node in &self.nodes {
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let crdt = node.crdt.lock().unwrap();
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if let Some((price, confidence, sources)) =
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crdt.get_aggregate_price(&AssetPair("ETH/USD".to_string()), 60)
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{
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prices.push((node.id.0.clone(), price, confidence, sources));
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println!(
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" {} sees: ${:.2} (confidence: {}%, sources: {})",
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node.id.0,
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price as f64 / 1_000_000.0,
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confidence,
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sources
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);
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}
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}
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// Calculate network consensus
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if !prices.is_empty() {
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let avg_price: u128 =
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prices.iter().map(|(_, p, _, _)| *p).sum::<u128>() / prices.len() as u128;
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let min_price = prices.iter().map(|(_, p, _, _)| *p).min().unwrap();
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let max_price = prices.iter().map(|(_, p, _, _)| *p).max().unwrap();
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let deviation = ((max_price - min_price) as f64 / avg_price as f64) * 100.0;
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println!("\n📊 Network Consensus:");
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println!(" Average: ${:.2}", avg_price as f64 / 1_000_000.0);
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println!(
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" Range: ${:.2} - ${:.2}",
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min_price as f64 / 1_000_000.0,
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max_price as f64 / 1_000_000.0
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);
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println!(" Max Deviation: {:.2}%", deviation);
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}
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}
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fn print_final_stats(&self) {
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println!("\n\n🏁 Final Statistics");
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println!("===================");
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let mut total_attestations = 0;
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let mut oracle_stats = Vec::new();
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for node in &self.nodes {
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let crdt = node.crdt.lock().unwrap();
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let node_attestations = crdt.attestations.len();
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total_attestations += node_attestations;
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let score = crdt.oracle_scores.get(&node.id).unwrap_or(&0.5);
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oracle_stats.push((node.id.0.clone(), node_attestations, *score));
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}
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println!("\n📈 Oracle Performance:");
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for (id, attestations, score) in oracle_stats {
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let node_type = if id.starts_with("byzantine") {
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"🔴"
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} else {
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"🟢"
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};
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println!(
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" {} {} - Attestations: {}, Reputation: {:.2}",
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node_type, id, attestations, score
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);
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}
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println!("\n📊 Network Totals:");
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println!(" Total Attestations: {}", total_attestations);
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println!(
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" Attestations/second: {:.2}",
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total_attestations as f64 / 30.0
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);
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// Show that Byzantine nodes were filtered out
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if let Some(node) = self.nodes.first() {
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let crdt = node.crdt.lock().unwrap();
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if let Some((price, confidence, sources)) =
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crdt.get_aggregate_price(&AssetPair("ETH/USD".to_string()), 300)
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{
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println!(
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"\n✅ Final Aggregated Price: ${:.2} (confidence: {}%)",
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price as f64 / 1_000_000.0,
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confidence
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);
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println!(" Despite Byzantine manipulation attempts!");
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}
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}
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}
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}
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// ============ Helper Functions ============
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fn timestamp() -> u64 {
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SystemTime::now()
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.duration_since(UNIX_EPOCH)
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.unwrap()
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.as_secs()
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}
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fn rand() -> f64 {
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let nanos = SystemTime::now()
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.duration_since(UNIX_EPOCH)
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.unwrap()
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.as_nanos();
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((nanos % 1000) as f64) / 1000.0
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}
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// ============ Main Function ============
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fn main() {
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println!("BFT-CRDT Oracle Network Demo");
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println!("============================\n");
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let simulator = NetworkSimulator::new();
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simulator.run(Duration::from_secs(30));
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println!("\n✅ Demo completed!");
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println!("\n💡 Key Takeaways:");
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println!(" • Oracles submitted prices without coordination");
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println!(" • Byzantine nodes couldn't corrupt the aggregate price");
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println!(" • Network partitions were handled gracefully");
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println!(" • No consensus protocol was needed!");
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}
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