optimizing-gas-fees

name	optimizing-gas-fees
description	Optimize blockchain gas costs by analyzing prices, patterns, and timing. Use when checking gas prices, estimating costs, or finding optimal windows. Trigger with phrases like "gas prices", "optimize gas", "transaction cost", "when to transact".
allowed-tools	Read, Bash(python3:*)
version	1.27.0
author	Jeremy Longshore <[e-mail]>
license	MIT
tags	["crypto","cost-optimization","optimizing-gas"]
compatibility	Designed for Claude Code

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:

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