Chains

Owl Protocol chain configs. Extends viem chain definitions with additional data and adds new chains.

Getting Chain Info

There are multiple sources to find interesting chain integrations:

• github.com/wevm/viem/tree/main/src/chains/definitions: viem chain configs contain most core info
• chainlist.org: Large database of chains. A frontend for github.com/ethereum-lists/chains
• drpc.org/chainlist: Chains supported by dRPC
• ankr.com/docs/rpc-service/chains/chains-list/: Chains supported by Ankr
• thirdweb.com/chainlist: Chains supported by ThirdWeb
• docs.pimlico.io/bundler/reference/supported-chains: Chains supported by Pimlico
• rollup.wtf: A good source for ranking rollups based on activity
• app.conduit.xyz/browse-networks: Conduit.xyz public chains
• bundlebear.com/overview/all: Is the chain ERC4337 ecosystem active?
• superchain.eco/chains: Optimism Superchain Ecosystem chains. These are all Optimism Rollups, most of them on OPStack Bedrock version.
• portal.arbitrum.io/orbit/ecosystem: Arbitrum Orbit Ecosystem chains. These are all Arbitrum Orbit chains.

Bridging Funds to Chains

Beyond just getting RPC info, getting funds onto the chain is also a requirement for launch. Once bridged, the only requirement is funding the utility account (varies between staging/production environments) which then manages distributing funds to necessary accounts (bundler, paymaster). You can use the following resources to get funds onto a chain:

Native Bridging

These bridges are chain-specific. Often Third-party bridges can be faster and cheaper but for testnets these are often the only option.

• Testnet Faucets: If the chain is a testnet, funds can be acquired from a faucet or core team members (if need more)
• OPStack bridging: For OPStack chains, if the parent chain (eg. Ethereum, Base, Mode) utility account is well-funded, funding may not be needed as the Owl API can automatically bridge. Many rollups are anchored on Sepolia/Holesky for testnet. You can buy Sepolia/Holesky ETH in bulk at sepoliaeth.com or holeskyeth.org
• superbridge.app: Optimism Superchain Native Bridge
• portal.polygon.technology/bridge: Polygon Native Bridge
• opbnb-bridge.bnbchain.org: OPBNB Native Bridge
• pacific-bridge.manta.network/: Manta Native Brige
• bridge.metis.io: Metis Native Bridge
• bridge.mantle.xyz: Mantle Native Bridge
• bridge.arbitrum.io: Arbitrum Native Bridge
• bridge.linea.build: Linea Native Bridge

Third-Party Bridging

• orbiter.finance: Orbiter Finance is a fast and cheap bridge that supports many chains.
• stargate.finance/bridge: Stargate Bridge
• app.debridge.finance/deswap: DeBrige
• portfolio.metamask.io/bridge: Metamask Bridge
• Buy on centralized exchange: This should be the last resort when it is impossible to find any on-chain mechanism (eg. bridge) to get funds onto the chain.

Firebase Chains Upload

To avoid the need to re-deploy services (eg. API, Dashboard), chain configurations are stored on Firebase as a way to dynamically update the data. Chains configs are stored under network for public configurations and networkPrivate for private server-side only configs that contain moderately sensitive information such as RPC API keys.

To upload chain data run the uploadNetworks script with the correct environment config.

npm run scripts:uploadNetworks # Local Firebase, usually not needed
NODE_ENV=staging npm run scripts:uploadNetworks # Staging
NODE_ENV=production npm run scripts:uploadNetworks # 🚨 Production 🚨

Chain Integration Checklist

Initial Research

• Is it EVM equivalent?
• Is it a particular rollup stack (OPStack, Arbitrum Orbit, ZKStack)?
• Is Arachnid Deployer (0x4e59b44847b379578588920ca78fbf26c0b4956c) deployed? If not, is EIP-155 (replay protection) enforced (must NOT be to allow deployment)?
• Is ERC4337 v0.7 deployed (0x0000000071727De22E5E9d8BAf0edAc6f37da032) ? This is more for informational purposes.
• Is there a viem config?
• Is there a private RPC provider (dRPC, Ankr, others)?

Configuration

• Add chain config info
• If OPStack chain, add parent chain config
• Fund utility account or utility account on parent chain (if OPStack)

Upload & QA

• Upload network config as "enabled" on staging Firebase
• Test out NFT deploy by running dashboard locally but with staging env (see README on dashboard)
• Upload network config as "enabled" on production Firebase
• Test out NFT deploy on live production dashboard