gas-optimization

name	gas-optimization
description	Gas optimization skill for EVM chains. Use when batching txs, optimizing gas estimates, predicting base fee, or deciding when and how to send transactions cheaper (EIP-4844 blob, batch vs separate).
version	1.0.0
author	XSpoonAi Team
tags	["gas","optimization","eip-4844","batch","base fee","ethereum","evm"]
triggers	[{"type":"keyword","keywords":["gas optimize","batch transaction","base fee predict","when to send","blob gas","eip-4844","gas estimate","multicall","gas cheaper"],"priority":90},{"type":"pattern","patterns":["(?i)(optimize|reduce|lower|save) .*(gas|fee)","(?i)(batch|multicall) .*(transaction|tx|gas)","(?i)(when|best time) .*(send|submit|broadcast)","(?i)(blob|eip-4844) .*(gas|cost)"],"priority":85}]
parameters	[{"name":"chain","type":"string","required":false,"default":"ethereum","description":"EVM chain (ethereum, polygon, arbitrum, optimism, base)"},{"name":"to","type":"string","required":false,"description":"Contract address for estimate_optimize"},{"name":"data","type":"string","required":false,"description":"Calldata hex for estimate_optimize"},{"name":"operations","type":"array","required":false,"description":"Operation types for batch_quote (e.g. erc20_transfer, uniswap_swap)"}]
prerequisites	{"env_vars":[],"skills":[]}
composable	true
persist_state	false
scripts	{"enabled":true,"working_directory":"./scripts","definitions":[{"name":"base_fee_predict","description":"Base fee history and when-to-send recommendation via eth_feeHistory","type":"python","file":"base_fee_predict.py","timeout":30},{"name":"batch_quote","description":"Compare batch vs separate transaction gas and savings","type":"python","file":"batch_quote.py","timeout":30},{"name":"estimate_optimize","description":"Estimate gas for a tx and suggest limit + EIP-1559 fees","type":"python","file":"estimate_optimize.py","timeout":30},{"name":"blob_quote","description":"EIP-4844 blob gas cost on Ethereum (Cancun+)","type":"python","file":"blob_quote.py","timeout":30},{"name":"optimization_report","description":"All-in-one gas optimization report (when/how to send cheaper)","type":"python","file":"optimization_report.py","timeout":45}]}

Gas Optimization Skill

Help agents decide when to send and how to send cheaper: base fee prediction, batch vs separate gas comparison, per-tx estimation with suggested limits and EIP-1559 fees, and EIP-4844 blob quotes on Ethereum.

Quick Start

Base fee prediction and when-to-send:

{"chain": "ethereum", "blocks": 20}

Batch vs separate gas:

{"chain": "ethereum", "operations": ["erc20_transfer", "erc20_transfer", "uniswap_swap"]}

Estimate and optimize a specific tx:

{"chain": "ethereum", "to": "0x...", "data": "0x...", "value": "0"}

EIP-4844 blob quote (Ethereum):

{"chain": "ethereum"}

All-in-one report:

{"chain": "ethereum", "priority": "medium"}

Scripts

Script	Purpose
base_fee_predict.py	Base fee history, simple prediction, when-to-send advice
batch_quote.py	Batch vs separate gas and savings (multicall-style)
estimate_optimize.py	eth_estimateGas + suggested gas limit and EIP-1559 fees
blob_quote.py	EIP-4844 blob base fee and cost per blob (Ethereum)
optimization_report.py	Combined report: gas now, base fee, batch hint, recommendations

Environment Variables

Variable	Required	Description
ETHEREUM_RPC	No	Override Ethereum RPC (default public RPC)
POLYGON_RPC	No	Override Polygon RPC
ARBITRUM_RPC	No	Override Arbitrum RPC
OPTIMISM_RPC	No	Override Optimism RPC
BASE_RPC	No	Override Base RPC
ETHERSCAN_API_KEY	No	For ETH price USD conversion (optional)

Best Practices

1. Check base fee trend before large txs; avoid peak hours when possible.
2. Batch multiple operations (e.g. multicall) to save on repeated base fee and overhead.
3. Use estimate_optimize for contract calls; use suggested gas limit with ~10–15% buffer.
4. EIP-4844 blobs are for large data (e.g. L2 batches); use only when needed.