Optimizing Gas Fees

Overview

Gas fee optimization skill that:

• Fetches real-time gas prices from multiple sources
• Estimates transaction costs in ETH and USD
• Analyzes historical patterns to find optimal timing
• Predicts future gas prices
• Compares gas across multiple chains

Prerequisites

• Python 3.8+ with requests library
• Network access to RPC endpoints
• Optional: ETHERSCAN_API_KEY for higher rate limits
• Optional: Custom RPC URLs via environment variables

Instructions

1. Check current gas prices (optionally for a specific chain):

   cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py current
   cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py current --chain polygon
   

2. Estimate transaction cost for known operations or custom gas limits (available operations: eth_transfer, erc20_transfer, erc20_approve, uniswap_v2_swap, uniswap_v3_swap, sushiswap_swap, curve_swap, nft_mint, nft_transfer, opensea_listing, aave_deposit, aave_withdraw, compound_supply, compound_borrow, bridge_deposit):

   cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py estimate --operation uniswap_v2_swap --all-tiers
   cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py estimate --gas-limit 150000 --tier fast  # 150000 = configured value
   

3. Find the optimal transaction window with lowest expected gas:

   cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py optimal
   

4. View gas patterns (hourly or daily):

   cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py patterns
   cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py patterns --daily
   

5. Predict future gas prices for a given hour:

   cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py predict --time 14
   

6. Compare gas prices across multiple chains:

   cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py compare
   

7. View base fee history for recent blocks:

   cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py history --blocks 50
   

Output

• Current: Base fee, priority fee, and tier prices (slow/standard/fast/instant)
• Estimate: Gas cost in native token and USD for each tier
• Patterns: Historical hourly/daily patterns with low-gas markers
• Optimal: Recommended transaction window with expected savings
• Predict: Gas forecast for specific time with confidence
• Compare: Side-by-side gas prices across chains

Supported Chains

Chain	Native Token	Block Time
Ethereum	ETH	~12 sec
Polygon	MATIC	~2 sec
Arbitrum	ETH	~0.25 sec
Optimism	ETH	~2 sec
Base	ETH	~2 sec

Price Tiers

Tier	Percentile	Confirmation Time
Slow	10th	10+ blocks (~2+ min)
Standard	50th	3-5 blocks (~1 min)
Fast	75th	1-2 blocks (~30 sec)
Instant	90th	Next block (~12 sec)

Error Handling

See ${CLAUDE_SKILL_DIR}/references/errors.md for:

• RPC connection issues
• API rate limiting
• Price feed errors
• Pattern analysis errors

Examples

See ${CLAUDE_SKILL_DIR}/references/examples.md for:

• Quick start commands
• Cost estimation scenarios
• Multi-chain comparison
• Practical workflows

Resources

• EIP-1559 - Fee market specification
• Etherscan Gas Tracker - Reference oracle
• L2Fees - L2 cost comparison