Optimizing gas fees

Skill ComeOnOliver/skillshub/skills/jeremylongshore/claude-code-plugins-plus-skills/optimizing-gas-fees

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".From its SKILL.md

Install

npx -y skills add ComeOnOliver/skillshub --skill optimizing-gas-fees

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

What its file declares

Copied from the file, not written here

The file declares its own license as MIT. That is the author’s claim about this one file, and it is not the same thing as the license GitHub reports for the repository, which is listed with the other numbers below.

SKILL.md

4.0 KB, 949 tokens by cl100k_base, as published. Nobody here has run it

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

What ships with it

Read from the repository

Just SKILL.md. No reference files, no scripts.