eth_estimateGas on Hemi
Everything below was measured on 2026-10-13 by calling eth_estimateGas on Hemi through the same endpoint customers use, and is re-measured weekly.
What eth_estimateGas does
Runs a transaction against current state and returns the gas it would use, so you can set a gas limit. If the transaction would revert or the sender cannot pay, the node returns an error instead of a number.
eth_estimateGas on Hemi: what we measured
| Zero-value ETH transfer to an EOA | 21,000 gas |
|---|---|
| Same on Ethereum | 21,000 gas |
| 1 wei from an empty account | failed with 30000000 gas: insufficient funds for gas * price + value: address 0x587dDA605EE64A387cc118e924CaF5007B8B1107 have 0 want 1 |
What the numbers mean
A plain transfer estimates at exactly 21,000 gas on Hemi, as on Ethereum. Contract calls vary with state, so estimate those rather than hard-coding a limit.
An estimate for a sender that cannot pay fails with: "failed with 30000000 gas: insufficient funds for gas * price + value: address 0x587dDA605EE64A387cc118e924CaF5007B8B1107 have 0 want 1". Your app sees this text when a user's balance is too low, so match on it to show a clear message.
Chains where a transfer is not 21,000 gas
Of the 53 chains we measure, 6 estimate a plain transfer at something other than 21,000 gas.
Example request
curl -s https://rpc.swiftnodes.io/rpc/hemi?key=YOUR_API_KEY \
-X POST -H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","id":1,"method":"eth_estimateGas","params":[{"from":"0x0000000000000000000000000000000000000000","to":"0x000000000000000000000000000000000000dEaD","value":"0x0"}]}'import { createPublicClient, http } from "viem";
const client = createPublicClient({
transport: http("https://rpc.swiftnodes.io/rpc/hemi?key=YOUR_API_KEY"),
});
const gas = await client.estimateGas({ account: from, to, value });
// Add headroom: state can change between estimate and inclusion
const gasLimit = (gas * 120n) / 100n;Other methods on Hemi
- eth_blockNumberSupported
- eth_chainIdSupported
- eth_getBalanceSupported
- eth_getBlockByNumberSupported
- eth_getTransactionByHashSupported
- eth_getTransactionReceiptSupported
- eth_callSupported
- eth_gasPriceSupported
- eth_maxPriorityFeePerGasSupported
- eth_sendRawTransactionSupported
- eth_getTransactionCountSupported
- eth_getCodeSupported
- eth_subscribeSupported
- eth_getLogsSupported
- eth_getBlockReceiptsSupported
- eth_feeHistorySupported
- eth_getProofSupported
- eth_createAccessListSupported
- debug_traceCallSupported
- trace_blockNot available
- trace_transactionNot available
eth_estimateGas on other chains
- Ethereum
- Base
- Arbitrum
- Optimism
- Polygon
- BNB Smart Chain
- Avalanche
- Sonic
- Linea
- Scroll
- zkSync Era
- Blast
- Mantle
- Gnosis
- Celo
- Berachain
- Monad
- Unichain
- Kaia
- PulseChain
- World Chain
- Ronin
- Abstract
- ApeChain
- MegaETH
- Fantom
- Lisk
- X Layer
- BOB
- Plasma
- Fraxtal
- Zora
- Story
- Soneium
- Sei
- Hyperliquid
- Taiko
- Morph
- Ink
- Katana
- Ethereum Classic
- opBNB
- Mode
- Flare
- Core
- Chiliz
- Telos EVM
- Tempo
- Cronos
- Manta Pacific
- Shibarium
- Boba Network
- Arbitrum Nova
- Immutable zkEVM
Frequently asked questions
Does Hemi support eth_estimateGas?
Yes. eth_estimateGas answered on the SwiftNodes Hemi endpoint when our weekly probe called it through the customer path (2026-10-13).
How much gas does a plain transfer use on Hemi?
eth_estimateGas returned 21,000 for a plain transfer on 2026-10-13.
What does "insufficient funds for gas * price + value" mean from eth_estimateGas on Hemi?
The sender's balance cannot cover the value plus the gas. Fund the account or lower the value; the have and want figures in the message are in wei.
Hemi endpoints, live block height and WebSocket status are on the Hemi RPC page.
One key covers every chain we serve, and SwiftNodes has a free tier.