Flashblocks - Edge RPC - Goldsky Docs

Flashblocks provide faster block confirmations on OP Stack chains by streaming pre-confirmed blocks before they’re finalized on L1. Edge RPC routes to flashblocks-enabled upstreams on supported networks.

Supported Networks

Network	Chain ID	Alias
Base	8453	`base`
Base Sepolia	84532	`base-sepolia`
Optimism	10	`optimism-mainnet`
Optimism Sepolia	11155420	`optimism-sepolia`
Unichain	130	`unichain-mainnet`
Unichain Testnet	1301	`unichain-testnet`

Usage

Target flashblocks-enabled upstreams by adding use-upstream=flashblocks* to your request:

https://edge.goldsky.com/standard/evm/8453?key=demo&use-upstream=flashblocks*

curl "https://edge.goldsky.com/standard/evm/8453?key=demo&use-upstream=flashblocks*" \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

import { JsonRpcProvider } from 'ethers'

const provider = new JsonRpcProvider(
  'https://edge.goldsky.com/standard/evm/8453?key=demo&use-upstream=flashblocks*'
)
const blockNumber = await provider.getBlockNumber()

import { createPublicClient, http } from 'viem'
import { base } from 'viem/chains'

const client = createPublicClient({
  chain: base,
  transport: http('https://edge.goldsky.com/standard/evm/8453?key=demo&use-upstream=flashblocks*')
})
const blockNumber = await client.getBlockNumber()

You can also pass the directive as a header instead of a query parameter:

curl "https://edge.goldsky.com/standard/evm/8453?key=demo" \
  -X POST \
  -H "Content-Type: application/json" \
  -H "X-ERPC-Use-Upstream: flashblocks*" \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'