Analyzing Mempool
Contents
Overview | Prerequisites | Instructions | Output | Error Handling | Examples | Resources
Overview
Monitor Ethereum mempool for pending transactions, analyze gas prices, detect DEX swaps, and identify potential MEV opportunities. Useful for traders, MEV researchers, and protocol developers.
Prerequisites
- Install Python 3.8+ with requests library
- Configure Ethereum RPC URL (default: public endpoint, or set
ETHRPCURL)
- Verify internet access for RPC calls
Instructions
Step 1: Navigate to Scripts Directory
cd ${CLAUDE_SKILL_DIR}/scripts
Step 2: Choose a Command
- View pending transactions:
python mempool_analyzer.py pending
- Analyze gas prices:
python mempool_analyzer.py gas
- Detect pending DEX swaps:
python mempool_analyzer.py swaps
- Scan MEV opportunities:
python mempool_analyzer.py mev
- Get mempool summary:
python mempool_analyzer.py summary
- Watch specific contract:
python mempool_analyzer.py watch 0x7a250d...
Alternatively, customize with flags:
python mempool_analyzer.py pending --limit 100 # Limit results
python mempool_analyzer.py --chain polygon gas # Use different chain
python mempool_analyzer.py --chain arbitrum pending # Or use Arbitrum
Step 3: Interpret Results
Gas Recommendations:
- Slow (10th percentile): May take 10+ blocks
- Standard (50th percentile): 2-5 blocks
- Fast (75th percentile): 1-2 blocks
- Instant (90th percentile): Next block likely
MEV Warnings:
- MEV detection is for educational purposes
- Real MEV extraction requires specialized infrastructure
- Use this for research and understanding mempool dynamics
Output
- Pending transaction lists with gas prices and types
- Gas price distribution and recommendations
- Detected DEX swaps with amounts and DEX identification
- MEV opportunity analysis with estimated profits
- JSON output for programmatic use (
--format json)
Error Handling
See ${CLAUDESKILLDIR}/references/errors.md for:
- RPC connection issues and timeout recovery
- Mempool access limitations per chain
- Transaction decoding errors and fallbacks
- Gas analysis edge cases
Examples
Example 1: Check gas before sending transaction:
How It Works
The mempool agent automatically activates when you discuss:
- Mempool analysis and pending transactions
- MEV opportunities and extraction strategies
- Gas price optimization
- Front-running and sandwich attack detection
- Large transaction monitoring
Example Queries
What MEV opportunities are currently in the mempool?
Show me all pending large ETH transfers over $1M
What's the optimal gas price for the next block?
Analyze pending Uniswap swaps for arbitrage opportunities
Monitor address 0x... for incoming mempool transactions