L2 ROLLUP · ARBITRUM ORBIT

Block Explorer for Arbitrum One

Ethernal is a hosted block explorer for Arbitrum One that provides real-time transaction decoding, contract verification, and Nitro-native features. Connect your RPC, configure your Orbit settings, and have a branded explorer running in minutes.

Chain ID 42161

Framework Arbitrum Orbit

Parent Ethereum

Token ETH

Orbit-Native Configuration

Arbitrum One runs on Nitro, the engine behind Arbitrum Orbit chains. Ethernal monitors your Orbit chain's RollupCore contract, tracks assertion postings, and detects challenges. Configure it with your chain's Rollup and Inbox contract addresses.

explorer.arb.example/settings

Arbitrum Orbit Configuration

L1 Parent Chain

Ethereum Mainnet

Rollup Contract Address

0x5eF0D09d1E6204141B4d37530808eD19f60FBa35

Inbox Contract Address

0x4Dbd4fc535Ac27206064B68FfCf827b0A60BAB3f

Create Configuration

explorer.arb.example/tx/0x6bc1…8d3f

Call TraceSuccess

CALL0x5288…6bE1createRetryableTicket(address,uint256,uint256,address,address,uint256,uint256,bytes)

DELEGATECALL0x00A0…1235_deliverMessage(address,uint256,uint256,uint256,bytes)

LOGInboxMessageDelivered(messageNum: 847291, data: 0x...)

LOGMessageDelivered(messageIndex, beforeAcc, inbox, ...)

Decoded Transactions with Retryable Tickets

Arbitrum uses retryable tickets for L1-to-L2 messaging. When a cross-chain message is submitted, Ethernal decodes both the L1 transaction and the resulting L2 retryable ticket execution. You see the full lifecycle: submission, auto-redeem, and final execution with decoded parameters.

Explorer Features

Contract Verification

Verify Solidity source, read and write contract state from the UI

Token Tracking

ERC-20, ERC-721, and ERC-1155 transfers and balance changes

Call Traces

Full execution traces with nested internal calls and revert reasons

Custom Domain

Your brand, your domain, full whitelabel on paid plans

Arbitrum One Architecture

Arbitrum One is an optimistic rollup built on the Nitro tech stack by Offchain Labs. It settles on Ethereum and uses fraud proofs (via BOLD, the Bounded Liquidity Delay protocol) to guarantee correctness. Key architectural details for developers:

Nitro Execution

Compiles EVM to WASM for dispute resolution. Standard Solidity contracts deploy and run identically to Ethereum. Gas pricing uses a two-dimensional model: L2 computation + L1 calldata.

Sequencer

Currently centralized (operated by Offchain Labs) with a decentralized sequencer on the roadmap. Transactions get soft-confirmed in under 1 second, with finality on Ethereum after the challenge period.

BOLD Fraud Proofs

Bounded Liquidity Delay ensures that disputes resolve within a fixed time window, preventing delay attacks. Validators can challenge incorrect state assertions posted to Ethereum.

How to Set Up an Arbitrum One Block Explorer

Create a workspace

Connect your Arbitrum RPC

Paste your RPC endpoint. For Arbitrum One mainnet: https://arb1.arbitrum.io/rpc, or use Alchemy, Infura, QuickNode, or any provider.

Configure Orbit bridge monitoring

Enter your Rollup contract (0x5eF0D09d1E6204141B4d37530808eD19f60FBa35) and Inbox (0x4Dbd4fc535Ac27206064B68FfCf827b0A60BAB3f) addresses.

Go live

Point your custom domain and your branded Arbitrum One explorer is live with transaction decoding, contract verification, and bridge tracking.

Arbitrum Explorer Options Compared

Teams building on Arbitrum typically evaluate Arbiscan (official, Etherscan-operated), Blockscout, and Ethernal.

FeatureEthernalArbiscanBlockscout

Custom domainYesNoYes (self-host)

Full whitelabelYesNoYes (self-host)

L1 bridge trackingBuilt-inPartialPlugin

Hosted (no infra)YesYesSelf-host

Setup time< 5 minN/A (public)Hours/days

Call tracesYesYesYes

Your own Orbit chainSupportedNoSelf-host

Pricing for Arbitrum Explorers

The Starter plan (free, ad-supported) includes contract verification, token tracking, and unlimited transactions. For custom domains and L1 bridge integration, the Team plan is $150/month. Full whitelabel with custom branding, status page, and 5M transactions is $500/month on the App Chain plan.

View Full Pricing

Frequently Asked Questions

How do I set up a block explorer for Arbitrum One?

Create a workspace on Ethernal, paste your Arbitrum One RPC endpoint (e.g. https://arb1.arbitrum.io/rpc), configure the Orbit bridge settings with your Rollup and Inbox addresses, and point your custom domain. Takes under 5 minutes.

Does Ethernal work with custom Arbitrum Orbit chains?

Yes. Ethernal supports any chain built on the Arbitrum Orbit stack, not just Arbitrum One. Provide your custom chain's RPC and Rollup/Inbox addresses, and Ethernal configures bridge monitoring automatically.

Can I use Ethernal as an Arbiscan alternative for my own chain?

Yes. Arbiscan only serves the public Arbitrum One and Nova networks. If you are running your own Orbit chain, Ethernal gives you a dedicated, whitelabel explorer with your domain and branding.

What is the difference between Arbitrum One, Arbitrum Nova, and Orbit?

Arbitrum One is the main rollup (optimistic, settles on Ethereum). Arbitrum Nova uses AnyTrust (committee-based data availability) for lower fees. Orbit is the framework for launching custom L2/L3 chains. Ethernal supports all three.

Does Ethernal support Arbitrum Sepolia testnet?

Yes. Connect your Arbitrum Sepolia RPC (chain ID 421614) and you get the same features: transaction decoding, contract verification, and bridge monitoring.

Ready to launch your explorer?

Deploy a fully-featured block explorer for your EVM chain in under 5 minutes. No credit card required.

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