# Skill 12 Gas Optimization

> Optimizes transaction gas via EIP-1559 fee prediction, nonce management, private transaction submission, and EIP-4844 blob fee handling. Use when estimating fees, fixing stuck transactions, or submitting MEV-sensitive txs.

- **Type:** Skill
- **Install:** `agentstack add skill-vaquarkhan-web3-agent-skills-skill-12-gas-optimization`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [vaquarkhan](https://agentstack.voostack.com/s/vaquarkhan)
- **Installs:** 0
- **Category:** [Developer Tools](https://agentstack.voostack.com/c/developer-tools)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [vaquarkhan](https://github.com/vaquarkhan)
- **Source:** https://github.com/vaquarkhan/web3-agent-skills/tree/main/skills/skill-12-gas-optimization

## Install

```sh
agentstack add skill-vaquarkhan-web3-agent-skills-skill-12-gas-optimization
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Gas Optimization

## When to Use

- Estimating transaction costs before execution
- Managing nonces for sequential or parallel txs
- Submitting private transactions (Flashbots, MEV-Share)
- Handling EIP-4844 blob transactions (L2 data availability)
- Recovering stuck transactions (speed up / cancel)

## Prerequisites

- MCP: `blockchain-rpc-server`
- Skill-15 for private tx routing on mainnet swaps

## EIP-1559 Fee Strategy

```
maxPriorityFeePerGas = baseFee * 0.1 (min 1 gwei on Ethereum)
maxFeePerGas = baseFee * 2 + maxPriorityFeePerGas
```

1. Fetch `eth_feeHistory` for last 10 blocks
2. Use 75th percentile of priority fees
3. On L2s (Arbitrum, Base, Optimism): use L1 data fee + L2 execution fee

## Nonce Management

- Query `eth_getTransactionCount` with `pending` tag
- Use nonce manager for parallel txs (increment locally, track pending)
- Cancel: send 0 ETH self-transfer with same nonce, +20% gas
- Speed up: resubmit with same nonce, +15% maxFeePerGas

## Private Transactions

| Network | Method |
|---------|--------|
| Ethereum | Flashbots Protect RPC, MEV-Share |
| Polygon | Fastlane private RPC |
| Base/Arbitrum | Sequencer private orderflow (limited) |

Use private submission for swaps, liquidations, and any MEV-exposed operation.

## Blob Fees (EIP-4844)

For rollup batch submissions or blob-carrying txs:

```
blobGasPrice = getBlobBaseFee()
totalBlobCost = blobGasUsed * blobGasPrice
```

Monitor `excessBlobGas` in block header for fee spikes.

## L2 Gas Notes

| Chain | Gas Token | Notes |
|-------|-----------|-------|
| Arbitrum | ETH | L1 calldata cost dominates |
| Optimism | ETH | L1 fee + L2 fee split |
| Base | ETH | OP Stack, similar to Optimism |
| Polygon | POL | Low base fees, occasional spikes |

## References

- `references/fee-oracles.md` — RPC methods and fallback APIs

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [vaquarkhan](https://github.com/vaquarkhan)
- **Source:** [vaquarkhan/web3-agent-skills](https://github.com/vaquarkhan/web3-agent-skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-vaquarkhan-web3-agent-skills-skill-12-gas-optimization
- Seller: https://agentstack.voostack.com/s/vaquarkhan
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.