mev-beta/docs/IMMEDIATE_ACTIONS_REQUIRED_20251030.md

# Immediate Actions Required - MEV Bot
**Date**: October 30, 2025
**Priority**: 🔴 URGENT
**Status**: Bot Non-Operational - Multiple Blocking Issues

---

## 🎯 Quick Summary

**Swap Detection Fix Status**: ✅ Code Complete, ❌ Cannot Test

**Blocking Issues**:
1. 🔴 Bot hangs at startup (after loading config)
2. 🔴 16,000+ ABI unmarshaling errors (prevents pool data fetching)
3. 🟡 Port conflicts on :9090 and :8080
4. 🟡 56MB error log file

---

## ⚡ IMMEDIATE ACTIONS (Next 30 Minutes)

### Action 1: Clean Up Environment (5 minutes)
```bash
# Kill all existing bot processes
pkill -9 -f mev-bot

# Clear port conflicts
lsof -ti:9090 | xargs kill -9 2>/dev/null || true
lsof -ti:8080 | xargs kill -9 2>/dev/null || true

# Archive massive error log
cd /home/administrator/projects/mev-beta
mv logs/mev_bot_errors.log logs/archives/errors_pre_fix_$(date +%Y%m%d).log
touch logs/mev_bot_errors.log
```

### Action 2: Debug Startup Hang (15 minutes)
```bash
# Run with maximum debug logging and timeout
LOG_LEVEL=debug timeout 45 ./mev-bot start 2>&1 | tee startup_debug_$(date +%H%M).log

# Watch where it hangs
tail -f startup_debug_*.log

# If it hangs, press Ctrl+C and check last log line
```

### Action 3: Test with Minimal Config (10 minutes)
```bash
# Disable problematic features temporarily
export METRICS_ENABLED=false
export DASHBOARD_ENABLED=false

# Try starting with HTTP only (no WebSocket)
export ARBITRUM_WS_ENDPOINT=""

# Start bot
timeout 60 ./mev-bot start 2>&1 | tee minimal_test.log
```

---

## 🔧 PRIMARY ISSUES & FIXES

### Issue #1: Bot Startup Hang ⏸️

**Symptom**:
```
Loaded environment variables from .env
Using configuration: config/local.yaml (GO_ENV=development)
[HANGS - no further output]
```

**Likely Causes**:
- Provider configuration trying to connect to all invalid endpoints
- WebSocket connection attempts timing out
- Contract initialization hanging
- Pool cache file load issue

**Quick Diagnostic**:
```bash
# Check if it's provider-related
strace -e network ./mev-bot start 2>&1 | head -100

# Check if it's file I/O related
strace -e open,read ./mev-bot start 2>&1 | grep -E "\.json|\.yaml"
```

**Potential Fixes**:
1. **Skip Provider Loading**: Comment out provider initialization in `cmd/mev-bot/main.go`
2. **Use Single Endpoint**: Only configure one working RPC in `.env`
3. **Disable WebSocket**: Set `ws_endpoint: ""` in config
4. **Skip Pool Cache**: Rename `data/pools.json` to force fresh discovery

---

### Issue #2: ABI Unmarshaling Errors 🔴

**Error Pattern**:
```
abi: cannot unmarshal struct { V2Data []struct {...}; V3Data []struct {...} }
in to []datafetcher.DataFetcherV2PoolData
```

**Root Cause**: Contract ABI mismatch between deployed contract and Go bindings

**Impact**: Even with swap detection working, bot cannot fetch pool data for arbitrage calculation

**Files to Check**:
```bash
find . -name "*datafetcher*.go" -type f
# Expected files:
# - pkg/datafetcher/datafetcher.go
# - bindings/datafetcher/datafetcher.go
```

**Fix Options**:

**Option A: Regenerate Bindings**
```bash
# If you have the contract ABI
abigen --abi contracts/DataFetcher.abi \
       --pkg datafetcher \
       --out pkg/datafetcher/datafetcher.go

# Then rebuild
go build -o mev-bot ./cmd/mev-bot
```

**Option B: Update Struct Manually**
```go
// Find in pkg/datafetcher/ or bindings/datafetcher/
// Change from:
type DataFetcherV2PoolData struct {
    Pool common.Address
    // ...
}

// To:
type DataFetcherBatchResponse struct {
    V2Data []struct {
        Pool             common.Address
        Token0           common.Address
        Token1           common.Address
        Reserve0         *big.Int
        Reserve1         *big.Int
        BlockTimestampLast uint32
        Price0           *big.Int
        Price1           *big.Int
    } `json:"v2Data"`

    V3Data []struct {
        Pool         common.Address
        Token0       common.Address
        Token1       common.Address
        Fee          *big.Int
        SqrtPriceX96 *big.Int
        Tick         *big.Int
        Liquidity    *big.Int
        Price0       *big.Int
        Price1       *big.Int
    } `json:"v3Data"`

    BlockNumber *big.Int `json:"blockNumber"`
    Timestamp   *big.Int `json:"timestamp"`
}
```

**Option C: Disable DataFetcher** (Quick workaround)
```go
// In the code that calls DataFetcher, comment out or skip:
// if batchData, err := fetcher.GetPoolData(...); err != nil {
//     // Use fallback: fetch pool data via individual RPC calls
// }
```

---

### Issue #3: Port Conflicts 🟡

**Error**:
```
listen tcp :9090: bind: address already in use
listen tcp :8080: bind: address already in use
```

**Quick Fix**:
```bash
# Option A: Kill processes on ports
lsof -ti:9090 | xargs kill -9
lsof -ti:8080 | xargs kill -9

# Option B: Disable metrics/dashboard
export METRICS_ENABLED=false
# Or edit config/local.yaml:
# metrics:
#   enabled: false
```

**Permanent Fix**:
Add cleanup to bot shutdown:
```go
// In main.go shutdown handler
defer func() {
    metricsServer.Stop()
    dashboardServer.Stop()
}()
```

---

### Issue #4: 56MB Error Log 📁

**Impact**: Disk space, performance, log analysis difficulty

**Immediate Action**:
```bash
# Archive and compress
gzip logs/mev_bot_errors.log
mkdir -p logs/archives
mv logs/mev_bot_errors.log.gz logs/archives/errors_20251030_full.gz
touch logs/mev_bot_errors.log

# This frees up space and allows fresh error tracking
```

**Configure Log Rotation**:
```yaml
# In config/local.yaml or similar
logging:
  max_size: 10MB      # Rotate when file reaches 10MB
  max_backups: 5      # Keep 5 old files
  max_age: 7          # Delete files older than 7 days
  compress: true      # Compress rotated files
```

---

## 🎯 Testing Sequence (After Fixes)

Once bot starts successfully, follow this sequence:

### Step 1: Verify Startup (2 minutes)
```bash
./mev-bot start 2>&1 | tee test_startup.log &
BOT_PID=$!

# Wait and check logs
sleep 10
grep -E "Initializing|Creating|Loading" test_startup.log
```

**Expected Output**:
```
[INFO] Loaded environment variables
[INFO] Using configuration: config/local.yaml
[INFO] Initializing components...
[INFO] Creating arbitrage service...
[INFO] Pool discovery system initialized - X pools loaded
```

### Step 2: Verify Pool Discovery Integration (1 minute)
```bash
# Look for our fix logs
grep -E "Added.*discovered pools|DEX contract filter" test_startup.log
```

**Expected**:
```
[INFO] 🔧 Adding discovered pools to DEX contract filter...
[INFO] ✅ Added 96 discovered pools to DEX contract filter (total: 116 DEX contracts monitored)
[INFO] ✅ Discovered pools integrated with swap detection system
```

### Step 3: Monitor Swap Detection (5 minutes)
```bash
# Watch for swap detection
tail -f test_startup.log | grep -E "DEX transactions|swap.*detected|Block.*Processing"
```

**Expected**:
```
[INFO] Block 395162000: Processing 15 transactions, found 3 DEX transactions
[INFO] Swap detected on pool 0xC6962004f452bE9203591991D15f6b388e09E8D0
```

### Step 4: Check for Errors (ongoing)
```bash
# Monitor error log
tail -f logs/mev_bot_errors.log
```

**Should NOT see**:
- ❌ ABI unmarshaling errors (if DataFetcher fixed)
- ❌ Port binding errors (if ports cleared)
- ❌ Continuous connection failures

---

## 📊 Success Criteria Checklist

Before considering the bot operational:

- [ ] Bot starts without hanging
- [ ] No port binding errors
- [ ] Pool discovery completes (96 pools)
- [ ] Pools integrated with DEX filter (log message visible)
- [ ] Blocks being processed
- [ ] DEX transactions detected (> 0)
- [ ] Swap events found
- [ ] No ABI unmarshaling errors in log
- [ ] Error log stays under 1MB after 10 minutes

---

## 🔄 Fallback Plan

If bot still won't start after above fixes:

### Plan B: Minimal Working Bot
```bash
# 1. Use only .env configuration (skip providers.yaml)
# 2. Disable all optional features
# 3. Skip DataFetcher (use direct RPC calls)
# 4. Disable metrics and dashboard
# 5. Use single HTTP endpoint only
```

### Plan C: Staged Component Initialization
```go
// In main.go, comment out sections and add back one at a time:
// 1. Start with just config loading
// 2. Add RPC client
// 3. Add pool discovery
// 4. Add arbitrage service
// 5. Add monitor
// etc.
```

---

## 📞 What to Report

When asking for help or debugging further, provide:

1. **Startup Debug Log**:
   ```bash
   LOG_LEVEL=debug ./mev-bot start 2>&1 | head -200 > startup_full.log
   ```

2. **Last Log Line Before Hang**:
   ```bash
   tail -5 startup_full.log
   ```

3. **Port Status**:
   ```bash
   netstat -tlnp | grep -E ":(9090|8080|443|80)"
   ```

4. **Process Status**:
   ```bash
   ps aux | grep mev-bot
   ```

5. **Error Count**:
   ```bash
   wc -l logs/mev_bot_errors.log
   tail -50 logs/mev_bot_errors.log
   ```

---

## 🎯 Priority Order

**Do these in order:**

1. ✅ **Clean environment** (ports, logs) - 5 min
2. ✅ **Debug startup hang** - Find where it stops - 15 min
3. ⏸️ **Fix the blocker** (likely provider or WebSocket) - 30 min
4. ⏸️ **Test with minimal config** - Verify bot can start - 10 min
5. ⏸️ **Fix ABI mismatch** (if needed for pool data) - 1 hour
6. ⏸️ **Test swap detection** - Verify our fix works - 30 min

**Total estimated time to operational**: 2-3 hours

---

**Created**: October 30, 2025 20:35 UTC
**Status**: Actionable steps defined
**Next**: Execute cleanup and debug sequence

*The swap detection code is ready. These infrastructure issues must be resolved before we can test it.*