# Gas Fee

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**Publisher:** Decentralized Finance Publication

## Definition

The fee paid to validators to process and record a transaction on a blockchain. Gas fees on Ethereum are priced in Gwei (billionths of ETH) and vary with network congestion. Layer 2 networks (Arbitrum, Optimism, Base) offer gas fees that are 10-100x lower than Ethereum mainnet.

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Canonical: https://decentralized-finance.io/glossary/gas-fee/