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

• 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

• 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

• Find the optimal transaction window with lowest expected gas: cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py optimal

• 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

• Predict future gas prices for a given hour: cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py predict --time 14

• Compare gas prices across multiple chains: cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py compare

• 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