eth_feeHistory | Optimism

Optimism API method eth_feeHistory retrieves historical gas fee data, providing insights into gas price trends and block utilization over time. This method is valuable for estimating transaction fees and understanding network congestion.

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Parameters

• blockCount — the number of blocks to include in the history.
• newestBlock — the newest block (by number or one of the strings "earliest", "latest", or "pending") to include in the history.
• rewardPercentiles — an array of percentiles to calculate effective priority fees over the requested blocks.

Response

• result — an object containing:
  • oldestBlock — the oldest block number in the history.
  • baseFeePerGas — an array of base fees per gas for each block.
  • gasUsedRatio — an array of ratios of gas used to gas limit for each block.
  • reward — an array of arrays containing the priority fees at the specified percentiles for each block.

Use case

The eth_feeHistory method is essential for:

• Wallets and interfaces providing users with data-driven gas price suggestions.
• Applications and services monitoring Optimism network congestion and optimizing transaction fee estimates.
• Analysts studying Optimism gas fee trends and block space utilization.

Try the eth_feeHistory RPC method yourself