eth_getTransactionByHash on Arbitrum One
Fetches a transaction's full details (from, to, value, input, gas) by its hash. Returns null if the transaction is unknown or still pending propagation.
Null covers both 'unknown' and 'still propagating', so treat it as 'not yet' and retry rather than 'never'. The blockNumber field stays null until the tx is mined — the cleanest pending-vs-mined check.
Arbitrum One endpoint (public — no key)
https://rpc.nodeflare.app/arb/publicMethod
eth_getTransactionByHash
Cost
2 CU
Chain ID
42161
Block time
~250 ms
Finality
<1 s sequencer · L1-final ~13 min
Transactions on Arbitrum One
Nitro transactions pay L2 execution plus an L1 data component; receipts include gasUsedForL1. The sequencer gives sub-second soft confirmation, with L1 finality following later.
Parameters
[txHash]cURL
curl https://rpc.nodeflare.app/arb/public \
-X POST \
-H 'content-type: application/json' \
-d '{"jsonrpc":"2.0","method":"eth_getTransactionByHash","params":["0x0000000000000000000000000000000000000000000000000000000000000000"],"id":1}'ethers.js
import { ethers } from 'ethers';
const provider = new ethers.JsonRpcProvider(
'https://rpc.nodeflare.app/arb/public'
);
const result = await provider.send('eth_getTransactionByHash', ["0x0000000000000000000000000000000000000000000000000000000000000000"]);Try it live
Runs the example above against the public Arbitrum One endpoint — straight from your browser.
eth_getTransactionByHash on Arbitrum One — FAQ
How do I call eth_getTransactionByHash on Arbitrum One?
POST a JSON-RPC 2.0 request with "method": "eth_getTransactionByHash" to NodeFlare's Arbitrum One endpoint at https://rpc.nodeflare.app/arb/public. No API key is required for the public endpoint.
What does eth_getTransactionByHash cost on the free tier?
eth_getTransactionByHash is weighted at 2 compute units per call. The free tier includes 2,000,000 CU/month, so that is roughly 1,000,000 eth_getTransactionByHash calls per month — no credit card.
Is eth_getTransactionByHash available on the public Arbitrum One endpoint?
Yes. eth_getTransactionByHash works on the public Arbitrum One endpoint (https://rpc.nodeflare.app/arb/public) with no API key, rate-limited per IP. A free key adds higher limits and a dedicated path.
Anything Arbitrum One-specific to know when using eth_getTransactionByHash?
Nitro transactions pay L2 execution plus an L1 data component; receipts include gasUsedForL1. The sequencer gives sub-second soft confirmation, with L1 finality following later.
Call eth_getTransactionByHash on Arbitrum One with a free key
2,000,000 compute units/month, heavy methods unlocked, every chain included. No credit card.
Get your free API key →eth_getTransactionByHash on other chains
Other Arbitrum One methods
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