eth_getBlockByHash on Base
Fetches a full block by its hash. Identical payload to eth_getBlockByNumber but keyed on the 32-byte block hash.
Use it when you already hold a hash (from a log or a parent-hash walk) and need reorg-safe lookup: unlike a block number, a hash pins one specific block even across a reorg.
Base endpoint (public — no key)
https://rpc.nodeflare.app/base/publicMethod
eth_getBlockByHash
Cost
2 CU
Chain ID
8453
Block time
~2 s
Finality
~2 s soft · L1-final ~13 min
Blocks on Base
Base produces a block every 2 seconds — about 43,000 blocks a day, six times Ethereum's cadence. Block-number arithmetic tuned for mainnet (e.g. "last 7,000 blocks ≈ 1 day") is wrong here by 6×.
Parameters
[blockHash, fullTransactions:boolean]cURL
curl https://rpc.nodeflare.app/base/public \
-X POST \
-H 'content-type: application/json' \
-d '{"jsonrpc":"2.0","method":"eth_getBlockByHash","params":["0x0000000000000000000000000000000000000000000000000000000000000000", false],"id":1}'ethers.js
import { ethers } from 'ethers';
const provider = new ethers.JsonRpcProvider(
'https://rpc.nodeflare.app/base/public'
);
const result = await provider.send('eth_getBlockByHash', ["0x0000000000000000000000000000000000000000000000000000000000000000", false]);Try it live
Runs the example above against the public Base endpoint — straight from your browser.
eth_getBlockByHash on Base — FAQ
How do I call eth_getBlockByHash on Base?
POST a JSON-RPC 2.0 request with "method": "eth_getBlockByHash" to NodeFlare's Base endpoint at https://rpc.nodeflare.app/base/public. No API key is required for the public endpoint.
What does eth_getBlockByHash cost on the free tier?
eth_getBlockByHash 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_getBlockByHash calls per month — no credit card.
Is eth_getBlockByHash available on the public Base endpoint?
Yes. eth_getBlockByHash works on the public Base endpoint (https://rpc.nodeflare.app/base/public) with no API key, rate-limited per IP. A free key adds higher limits and a dedicated path.
Anything Base-specific to know when using eth_getBlockByHash?
Base produces a block every 2 seconds — about 43,000 blocks a day, six times Ethereum's cadence. Block-number arithmetic tuned for mainnet (e.g. "last 7,000 blocks ≈ 1 day") is wrong here by 6×.
Call eth_getBlockByHash on Base with a free key
2,000,000 compute units/month, heavy methods unlocked, every chain included. No credit card.
Get your free API key →