Arc mainnet checklist

Arc public mainnet launches after the hackathon deadline. The code is parameterized by chain; the checklist is short.

Already in place

• contracts/script/Deploy.s.sol branches on block.chainid == 5042 and reads ARC_USDC from the environment.
• packages/core/src/chains.ts and addresses.ts are keyed by chain id. Adding the mainnet RPC and USDC address, and redeploying with the same factory salt, yields the same factory and account addresses on Base mainnet and Arc mainnet.
• CCTP v2 addresses are constants in addresses.ts; the Arc mainnet domain id and contracts will be taken from Circle's documentation at launch. Confirm the domain before changing DOMAINS.
• Circle developer-controlled wallets do not yet list Arc mainnet in the SDK's blockchain enum; until they do, the local agent wallet is the mainnet path.

Steps at launch

1. Add ARC_RPC and ARC_USDC to .env; add a mainnet chain entry in chains.ts.
2. forge script script/Deploy.s.sol --rpc-url arc --broadcast, then on Base mainnet. Check both account: lines match.
3. Apply a conservative mandate: small caps, short expiry, and the presets with real mainnet addresses for Comet and CCTP.
4. Run the fork test against Base mainnet before any live step.
5. Record factory, account and the first execute transaction here.

Deployment record

To be filled at launch.