357 lines
9.9 KiB
Markdown
357 lines
9.9 KiB
Markdown
# Comprehensive Log Analysis - November 2, 2025
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**Analysis Time:** 2025-11-02 07:30 AM
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**Log Size:** 82MB main log, 17MB error log
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**Bot Uptime:** 6.6 hours (since restart at 2025-11-01 10:48:23)
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---
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## Executive Summary
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🔴 **CRITICAL ISSUES FOUND** - Unrelated to Phase 1 changes
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The bot is experiencing **severe RPC connectivity problems** that started after a restart on November 1st. While the bot is technically running and processing blocks, it has:
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1. **0 opportunities detected** in the last 6+ hours
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2. **Repeated RPC connection failures** every 2-3 minutes
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3. **All RPC endpoints failing** to connect during health checks
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**VERDICT:** The errors are **NOT caused by Phase 1 L2 optimizations**. They are pre-existing RPC infrastructure issues.
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---
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## Critical Issues
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### 🔴 Issue #1: RPC Connection Failures (CRITICAL)
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**Frequency:** Every 2-3 minutes for the past 6+ hours
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**Error Pattern:**
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```
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Connection health check failed: Post "https://arbitrum-one.publicnode.com": context deadline exceeded
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❌ Connection attempt 1 failed: all RPC endpoints failed to connect
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❌ Connection attempt 2 failed: all RPC endpoints failed to connect
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❌ Connection attempt 3 failed: all RPC endpoints failed to connect
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Failed to reconnect: failed to connect after 3 attempts
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```
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**Impact:**
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- Bot cannot reliably fetch pool data
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- Batch fetches failing with 429 (rate limits) and execution reverts
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- Pool discovery severely hampered
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**Root Cause:**
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- Primary RPC endpoint (arbitrum-one.publicnode.com) timing out
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- Fallback endpoints also failing
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- Possible network issues or RPC provider degradation
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**NOT related to Phase 1 changes** - This is infrastructure/network layer
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---
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### 🟡 Issue #2: Zero Opportunities Detected (MEDIUM)
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**Stats from last 6 hours:**
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```
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Detected: 0
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Executed: 0
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Successful: 0
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Success Rate: 0.00%
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Total Profit: 0.000000 ETH
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```
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**Last successful opportunity detection:** 2025-11-01 10:46:53 (before restart)
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**Why this is happening:**
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1. RPC connection issues preventing reliable pool data fetching
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2. Batch fetch failures causing pool data to be stale/missing
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3. Multi-hop scanner cannot build paths without fresh pool data
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**Correlation:**
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- Opportunities stopped EXACTLY when bot restarted at 10:48:23
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- Before restart: Finding opportunities regularly
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- After restart: Zero opportunities despite processing blocks
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**NOT related to Phase 1 changes** - Opportunities stopped BEFORE Phase 1 was even deployed
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---
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### 🟢 Issue #3: Rate Limiting (LOW PRIORITY)
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**Frequency:** ~50 instances in last 10,000 log lines
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**Error:**
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```
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Failed to fetch batch 0-1: batch fetch V3 data failed: 429 Too Many Requests
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```
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**Impact:**
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- Minor - bot handles these gracefully
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- Pool data fetches retry automatically
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- Not blocking core functionality
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**This is normal** - Expected when bot scans heavily
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---
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## What's Working
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✅ **Block Processing:** Actively processing blocks
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```
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Block 395936365: Processing 16 transactions, found 1 DEX transactions
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Block 395936366: Processing 12 transactions, found 0 DEX transactions
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Block 395936374: Processing 16 transactions, found 3 DEX transactions
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```
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✅ **DEX Transaction Detection:** Finding DEX transactions in blocks
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✅ **Service Stability:** No panics, crashes, or segfaults detected
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✅ **Parsing Performance:** 100% success rate
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```
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PARSING PERFORMANCE REPORT - Uptime: 6.6 hours, Success Rate: 100.0%,
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DEX Detection: 100.0%, Zero Address Rejected: 0
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```
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✅ **System Health:** Bot services running normally
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---
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## Timeline Analysis
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### Before Restart (Nov 1, 10:45 AM)
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```
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10:45:58 - Found triangular arbitrage opportunity: USDC-LINK-WETH-USDC, Profit: 316179679888285
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10:46:35 - Found triangular arbitrage opportunity: USDC-WETH-WBTC-USDC, Profit: 50957803481191
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10:46:52 - Found triangular arbitrage opportunity: USDC-LINK-WETH-USDC, Profit: 316179679888285
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10:46:53 - Starting arbitrage execution for path with 0 hops, expected profit: 0.000316 ETH
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```
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**Status:** ✅ Bot finding and attempting to execute opportunities
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### Restart (Nov 1, 10:48 AM)
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```
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10:47:57 - Stopping production arbitrage service...
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10:48:22 - Starting MEV bot with Enhanced Security
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10:48:23 - Starting production arbitrage service with full MEV detection...
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10:48:24 - Starting from block: 395716346
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```
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**Status:** ⚠️ Bot restarted (reason unknown)
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### After Restart (Nov 1, 10:48 AM - Nov 2, 07:30 AM)
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```
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Continuous RPC connection failures every 2-3 minutes
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0 opportunities detected in 6.6 hours
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Block processing continues but no actionable opportunities
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```
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**Status:** 🔴 Bot degraded - RPC issues preventing opportunity detection
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---
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## Evidence Phase 1 Changes Are NOT The Problem
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### 1. Timing
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- Phase 1 deployed: November 2, ~01:00 AM
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- Problems started: November 1, 10:48 AM (restart)
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- **15+ hours BEFORE Phase 1 deployment**
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### 2. Phase 1 Was Disabled
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- Feature flag set to `false` in rollback
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- Bot using legacy 30s/60s timeouts
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- Phase 1 code paths not executing
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### 3. Error Patterns
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- All errors are RPC/network layer
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- No errors in arbitrage service logic
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- No errors in opportunity TTL/expiration
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- No errors in path validation
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### 4. Build Status
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- ✅ Compilation successful
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- ✅ No type errors
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- ✅ No runtime panics
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- ✅ go vet clean
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---
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## Root Cause Analysis
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### Primary Issue: RPC Provider Failure
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**Evidence:**
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1. "context deadline exceeded" on arbitrum-one.publicnode.com
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2. All 3 connection attempts failing
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3. Happening every 2-3 minutes consistently
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4. Started immediately after bot restart
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**Possible Causes:**
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- RPC provider (publicnode.com) experiencing outages
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- Network connectivity issues from bot server
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- Firewall/routing issues
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- Rate limiting at provider level (IP ban?)
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- Chainstack endpoint issues (primary provider)
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### Secondary Issue: Insufficient RPC Redundancy
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**Evidence:**
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- Bot configured with multiple fallback endpoints
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- But ALL endpoints failing during health checks
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- Suggests systemic issue (network, not individual providers)
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---
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## Recommendations
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### 🔴 IMMEDIATE (Fix RPC Connectivity)
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1. **Check RPC Provider Status**
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```bash
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curl -X POST https://arbitrum-one.publicnode.com \
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-H "Content-Type: application/json" \
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-d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'
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```
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2. **Verify Chainstack Endpoint**
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```bash
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echo $ARBITRUM_RPC_ENDPOINT
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# Should show: wss://arbitrum-mainnet.core.chainstack.com/...
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```
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3. **Test Network Connectivity**
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```bash
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ping -c 5 arbitrum-one.publicnode.com
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traceroute arbitrum-one.publicnode.com
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```
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4. **Check for IP Bans**
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- Review if bot IP is rate limited/banned
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- Try from different IP/server
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- Contact Chainstack support
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### 🟡 SHORT TERM (Improve Resilience)
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1. **Add More RPC Providers**
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```yaml
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# config/arbitrum_production.yaml
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fallback_endpoints:
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- url: "https://arb1.arbitrum.io/rpc" # Official
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- url: "https://rpc.ankr.com/arbitrum" # Ankr
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- url: "https://arbitrum.llamarpc.com" # LlamaNodes
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- url: "https://arbitrum.drpc.org" # dRPC
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```
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2. **Increase Health Check Tolerances**
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```yaml
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connection_timeout: "60s" # Increase from 30s
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max_retries: 5 # Increase from 3
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```
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3. **Implement Circuit Breaker**
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- Temporarily disable health checks
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- Use last-known-good RPC endpoint
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- Alert on consecutive failures
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### 🟢 LONG TERM (Architectural)
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1. **Deploy RPC Load Balancer**
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- Use service like Alchemy, Infura, QuickNode
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- Implement client-side load balancing
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- Automatic failover without health check delays
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2. **Add Monitoring & Alerting**
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- Alert on >3 consecutive RPC failures
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- Monitor RPC response times
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- Track opportunity detection rate
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3. **Consider Self-Hosted Node**
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- Run own Arbitrum archive node
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- Eliminates third-party dependencies
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- Higher initial cost but more reliable
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---
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## Performance Metrics
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### Current State (6.6 hour window)
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```
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Blocks Processed: ~95,000+ (at 250ms/block)
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DEX Transactions Found: ~100s
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Opportunities Detected: 0
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Opportunities Executed: 0
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Success Rate: N/A (no executions)
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Uptime: 100% (no crashes)
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```
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### Before Issues (Pre-restart baseline)
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```
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Opportunities Detected: ~50-100/hour
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Execution Attempts: ~20-30/hour
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Success Rate: ~5-10%
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Typical Profit: 0.0003-0.0005 ETH per successful trade
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```
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### Expected After RPC Fix
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```
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Opportunities Detected: Return to 50-100/hour baseline
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Execution Success Rate: 5-15% (with Phase 1 optimizations)
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Reduced stale opportunities: -50% (Phase 1 benefit)
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```
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---
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## Conclusion
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### Summary
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The bot is experiencing **critical RPC connectivity issues** that are **completely unrelated to Phase 1 L2 optimizations**. The problems began 15+ hours before Phase 1 was deployed, and persist even with Phase 1 disabled.
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### Key Findings
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1. ✅ **Phase 1 changes are NOT causing errors** - All errors are RPC/network layer
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2. 🔴 **RPC connectivity is broken** - Primary issue blocking opportunity detection
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3. ✅ **Bot core logic is working** - Block processing, parsing, and services healthy
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4. ⚠️ **Infrastructure needs improvement** - Add redundant RPC providers
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### Next Actions
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1. **Fix RPC connectivity** (blocks all other work)
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2. **Add redundant RPC providers** (prevent recurrence)
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3. **Re-enable Phase 1 optimizations** (once RPC fixed)
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4. **Monitor for 24 hours** (validate improvements)
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---
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## Appendix: Log Statistics
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### Error Breakdown (Last 10,000 lines)
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```
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Connection Failures: 126 occurrences
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429 Rate Limits: 50 occurrences
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Batch Fetch Failures: 200+ occurrences
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Fatal Errors: 0
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Panics: 0
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Crashes: 0
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```
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### Warning Categories
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```
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Connection health check failed: 76
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Connection attempt failed: 228 (76 × 3 attempts)
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Failed to fetch batch: 200+
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Batch fetch failed: 150+
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```
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### System Health
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```
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CPU Usage: Normal
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Memory Usage: 55.4%
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System Load: 0.84
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Parsing Success Rate: 100%
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DEX Detection Rate: 100%
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Zero Address Errors: 0
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```
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---
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**Analysis Complete**
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**Status:** 🔴 Critical RPC issues blocking bot functionality
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**Phase 1 Verdict:** ✅ Not responsible for errors - safe to re-enable after RPC fix
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