eth_getCode on Arbitrum One
Returns the deployed bytecode at an address. An empty result (0x) means the address is an EOA, not a contract — a common way to distinguish the two.
The canonical EOA-vs-contract test: non-empty bytecode almost always means a contract. It returns 0x for a contract not yet deployed at that block, and for EIP-7702-delegated EOAs you'll see a short delegation indicator rather than full code.
Arbitrum One endpoint (public — no key)
https://rpc.nodeflare.app/arb/publicMethod
eth_getCode
Cost
2 CU
Chain ID
42161
Block time
~250 ms
Finality
<1 s sequencer · L1-final ~13 min
Accounts & state on Arbitrum One
State reads work as on any EVM chain, but remember block numbers move very fast — pin an explicit block number when correlating multiple state reads.
Parameters
[address, blockNumber|tag]cURL
curl https://rpc.nodeflare.app/arb/public \
-X POST \
-H 'content-type: application/json' \
-d '{"jsonrpc":"2.0","method":"eth_getCode","params":["0xaf88d065e77c8cc2239327c5edb3a432268e5831", "latest"],"id":1}'The example targets the USDC contract on Arbitrum One — you can run it as-is.
ethers.js
import { ethers } from 'ethers';
const provider = new ethers.JsonRpcProvider(
'https://rpc.nodeflare.app/arb/public'
);
const result = await provider.send('eth_getCode', ["0xaf88d065e77c8cc2239327c5edb3a432268e5831", "latest"]);Try it live
Runs the example above against the public Arbitrum One endpoint — straight from your browser.
eth_getCode on Arbitrum One — FAQ
How do I call eth_getCode on Arbitrum One?
POST a JSON-RPC 2.0 request with "method": "eth_getCode" 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_getCode cost on the free tier?
eth_getCode 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_getCode calls per month — no credit card.
Is eth_getCode available on the public Arbitrum One endpoint?
Yes. eth_getCode 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_getCode?
State reads work as on any EVM chain, but remember block numbers move very fast — pin an explicit block number when correlating multiple state reads.
Call eth_getCode 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 →