Block Explorer for OP Stack Chains
Ethernal is a hosted block explorer that works with any OP Stack chain. Whether you are running Base, Optimism, Mode, Zora, or your own custom rollup built on the OP Stack, Ethernal provides transaction decoding, contract verification, withdrawal tracking, and EIP-4844 blob monitoring out of the box.
Framework OP StackWhat is the OP Stack?
The OP Stack is a modular framework for building optimistic rollups, created by OP Labs and the Optimism Collective. It powers the Superchain: a network of interoperable L2 chains that share security and sequencing infrastructure on Ethereum. The OP Stack defines the execution layer (op-geth), derivation pipeline (op-node), batch submission, and fault proof system that all Superchain members use.
OptimismPortal
The L1 contract that handles deposits and withdrawals between Ethereum and the OP Stack chain. Every OP Stack chain deploys its own OptimismPortal, and Ethernal monitors it for bridge activity.
Batch Submission
The sequencer posts batches of L2 transactions to Ethereum L1. Since the Dencun upgrade (EIP-4844), most OP Stack chains use blobs instead of calldata, reducing costs by over 90%.
Fault Proofs
OP Stack chains use fault proofs (formerly called fraud proofs) to secure withdrawals. A 7-day challenge window allows anyone to challenge incorrect state proposals before funds can be withdrawn to L1.
Native OP Stack Bridge Monitoring
Ethernal understands the OP Stack architecture natively. Paste your OptimismPortal and Batch Inbox addresses, and it monitors deposits from Ethereum, tracks withdrawals through the 7-day challenge period, and indexes every batch your sequencer submits. Works with any OP Stack chain, not just the well-known ones.
L2-to-L1 Withdrawal Lifecycle
All OP Stack chains share the same withdrawal flow: initiation on L2, state root proposal to L1, 7-day challenge window, proving, and finalization on Ethereum. Ethernal tracks each step in real time across any OP Stack chain, so your users always know where their withdrawal stands.
Explorer Features
Chains Built on the OP Stack
The OP Stack powers a growing ecosystem of L2 chains known as the Superchain. Ethernal works with all of them. Here are some of the most prominent:
Base
Coinbase's L2. Largest OP Stack chain by TVL and transaction volume.
Optimism
The original OP Stack chain. Governance hub of the Superchain.
Blast
L2 with native yield on ETH and stablecoins. Unique tokenomics.
Mode
DeFi-focused L2 with sequencer fee sharing for protocol developers.
Zora
NFT and creator-focused L2. Optimized for minting and media.
Lisk
Migrated from its own L1 to an OP Stack L2 for Ethereum alignment.
Cyber
Social-focused L2 for decentralized social networking protocols.
Redstone
On-chain gaming L2 built on the OP Stack by Lattice.
Mint
NFT-focused L2 for digital collectibles and creator economy.
How to Set Up an OP Stack Block Explorer
Create a workspace
Sign up at app.tryethernal.com and create a new workspace. Select "Public Explorer" as the type.
Connect your chain's RPC
Paste the RPC endpoint for your OP Stack chain. This works with any chain: Base (https://mainnet.base.org), Optimism, Mode, or your own custom chain.
Configure OP Stack bridge monitoring
Enter your OptimismPortal and Batch Inbox addresses. Ethernal starts monitoring deposits, withdrawals, and batches automatically.
Go live
Point your custom domain (e.g. explorer.yourchain.example) to your Ethernal workspace. Your OP Stack explorer is live.
Pricing for OP Stack Explorers
Start free with the Starter plan (ad-supported, includes contract verification, token tracking, and unlimited transactions). For custom domains and L1 explorer integration, the Team plan starts at $150/month. Full whitelabel with custom branding, status page, and 5M transactions included is available on the App Chain plan at $500/month.
View Full PricingFrequently Asked Questions
What is the OP Stack?
The OP Stack is a modular, open-source framework for building optimistic rollups on Ethereum. It was created by OP Labs and powers the Superchain, a network of interoperable L2 chains including Optimism, Base, Mode, Zora, and many others. All OP Stack chains share the same execution layer (op-geth), derivation pipeline, and fault proof system.
Which chains use the OP Stack?
Major OP Stack chains include Optimism, Base (Coinbase), Mode, Zora, Blast, Redstone, Lisk, Cyber, Mint, and many more. The Superchain is growing rapidly, with new chains launching regularly. Ethernal works with all of them.
What is the difference between OP Stack and Arbitrum Orbit?
Both are frameworks for launching L2 rollups on Ethereum. The OP Stack uses optimistic rollups with fault proofs and a 7-day withdrawal challenge window. Arbitrum Orbit uses the Nitro engine with BOLD fraud proofs. OP Stack chains form the Superchain with shared sequencing, while Orbit chains can choose between rollup and AnyTrust modes. Ethernal supports both frameworks.
How do I set up a block explorer for my OP Stack chain?
Create a workspace on Ethernal, paste your chain's RPC endpoint, and configure the OP Stack bridge with your OptimismPortal and Batch Inbox addresses. Your explorer is live in under 5 minutes with transaction decoding, contract verification, and bridge tracking.
Does Ethernal work with custom OP Stack chains or only the well-known ones?
Ethernal works with any OP Stack chain, not just the well-known ones. If your chain runs on op-geth and uses the standard OptimismPortal and batch submission contracts, Ethernal will work with it. This includes private/permissioned chains as well.
Ready to launch your explorer?
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