Initial commit

Co-authored-by: Cursor <cursoragent@cursor.com>

src/utils/arbitrage_logger.rs

@@ -0,0 +1,70 @@
+use anyhow::Result;
+use chrono::Utc;
+use serde::Serialize;
+use std::fs::OpenOptions;
+use std::io::Write;
+use tracing::error;
+
+use crate::monitor::ArbitrageOpportunity;
+
+#[derive(Serialize)]
+struct ArbitrageRecord {
+    timestamp: String,
+    market_id: String,
+    market_name: String,
+    yes_token_id: String,
+    no_token_id: String,
+    yes_ask_price: String,
+    no_ask_price: String,
+    total_cost: String,
+    profit_percentage: String,
+    yes_size: String,
+    no_size: String,
+}
+
+/// Write arbitrage opportunity to file
+pub fn log_arbitrage_opportunity(
+    opp: &ArbitrageOpportunity,
+    market_name: &str,
+    file_path: &str,
+) -> Result<()> {
+    let record = ArbitrageRecord {
+        timestamp: Utc::now().to_rfc3339(),
+        market_id: format!("{:?}", opp.market_id),
+        market_name: market_name.to_string(),
+        yes_token_id: opp.yes_token_id.to_string(),
+        no_token_id: opp.no_token_id.to_string(),
+        yes_ask_price: opp.yes_ask_price.to_string(),
+        no_ask_price: opp.no_ask_price.to_string(),
+        total_cost: opp.total_cost.to_string(),
+        profit_percentage: opp.profit_percentage.to_string(),
+        yes_size: opp.yes_size.to_string(),
+        no_size: opp.no_size.to_string(),
+    };
+
+    // Format record as JSON
+    let json = serde_json::to_string_pretty(&record)?;
+    
+    // Append to file
+    let mut file = OpenOptions::new()
+        .create(true)
+        .append(true)
+        .open(file_path)?;
+    
+    writeln!(file, "{}", json)?;
+    writeln!(file, "---")?; // Separator
+    file.flush()?; // Flush to disk
+    
+    Ok(())
+}
+
+/// Async version of arbitrage log (avoids blocking)
+pub async fn log_arbitrage_opportunity_async(
+    opp: &ArbitrageOpportunity,
+    market_name: &str,
+    file_path: &str,
+) {
+    if let Err(e) = log_arbitrage_opportunity(opp, market_name, file_path) {
+        error!(error = %e, "Failed to write arbitrage log file");
+    }
+}