What is a Gas War?
A gas war occurs when many users simultaneously compete for limited block space by bidding higher and higher gas prices. This typically happens during high-demand events: popular NFT mints, token launches, or major market movements.
During a gas war, transaction fees can spike from a few dollars to hundreds or even thousands of dollars per transaction within minutes.
What Causes Gas Wars
NFT Mints
When a highly anticipated NFT collection launches, thousands of users try to mint simultaneously. The supply of NFTs is limited, so users bid up gas to get their mint transaction confirmed first.
Token Launches (IDOs, Fair Launches)
New token launches on DEXs often trigger gas wars as users rush to buy at the lowest price before the token pumps.
Liquidation Races
When a large DeFi position is close to liquidation, MEV bots and liquidators compete to be the first to liquidate, bidding up gas prices.
Market Crashes
During sudden market crashes, everyone rushes to sell or adjust positions simultaneously, driving gas prices through the roof.
How Gas Wars Work Under EIP-1559
After EIP-1559, gas wars work through the base fee + priority fee system:
- Sudden demand fills blocks above 50% capacity
- Base fee automatically increases (up to 12.5% per block)
- Users add high priority fees (tips) to outbid others
- Total gas price (base + priority) can spike dramatically
Historical Gas Wars
| Event | Year | Peak Gas Price | Context |
|---|---|---|---|
| CryptoKitties | 2017 | 100+ gwei | First major NFT congestion |
| Yuga Labs Otherside | 2022 | 8,000+ gwei | $150M+ in gas burned |
| STEPN Genesis | 2022 | 1,500+ gwei | Sneaker NFT mint |
| Blur token farming | 2023 | 500+ gwei | Airdrop farming |
How to Avoid Gas Wars
- Set a max gas price in your wallet — avoid accidentally paying $500 for a $10 mint
- Wait for the rush to subside — gas prices usually drop within an hour after launch
- Use Layer 2 — gas wars on mainnet Ethereum don’t affect Arbitrum, Optimism, or Base
- Pre-fund your wallet — have enough ETH for gas before the event starts
- Use allowlist / guaranteed mint — many projects offer lower-competition windows
Frequently Asked Questions
Q: How high can gas prices go during a gas war? A: There’s no hard cap. During the Otherside mint in 2022, effective gas prices exceeded 8,000 gwei (over $200 per simple transaction). The theoretical maximum is 30 million gwei, but that has never been reached.
Q: Who benefits from gas wars? A: Miners (pre-Merge) and validators (post-Merge) benefit from the high priority fees. MEV bots that win the competition also profit. Regular users almost always lose.
Q: Will Layer 2 eliminate gas wars? A: Layer 2s dramatically reduce gas costs (transactions cost cents instead of dollars), but gas wars can still happen on L2s during extreme demand. They’re just much cheaper.