> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cooket.fun/llms.txt
> Use this file to discover all available pages before exploring further.

# Environment configuration

> Arc, service, wallet, indexer, and realtime settings.

Use `.env.example` as a local template; never commit a real `.env`.

| Area            | Important variables                                                                                 |
| --------------- | --------------------------------------------------------------------------------------------------- |
| Network         | `COOKET_CHAIN_ID`, `ARC_TESTNET_RPC_URL`, `NEXT_PUBLIC_ARC_TESTNET_RPC_URL`                         |
| Browser         | `NEXT_PUBLIC_APP_URL`, `NEXT_PUBLIC_API_URL`, `NEXT_PUBLIC_REOWN_PROJECT_ID`                        |
| Write gate      | `NEXT_PUBLIC_ARC_TESTNET_FINANCIAL_EXECUTION_ENABLED` must be exactly `true` with Arc Testnet       |
| Contracts       | Factory, fee manager, CTO registry, graduation and custody addresses rendered from `cooket-v3.json` |
| Graduated swaps | Factory, SwapRouter, QuoterV2, canonical USDC rendered from the periphery manifest                  |
| Indexer         | Mode, start/stop block, confirmations, batch size, retry bounds, canonical roots                    |
| Realtime        | Arc WSS URL, reconcile interval, HTTP address, heartbeat, allowed origins, subscriber buffer        |

Public variables are embedded in browser assets. Do not put private RPC credentials, passwords, signing keys, or other secrets in `NEXT_PUBLIC_*`.

Missing or malformed financial configuration fails closed. Addresses alone do not enable writes. Production Next.js builds additionally require exactly `https://cooket.fun` and `https://api.cooket.fun` for the public application and API origins.

The production Compose file configures API and realtime listeners on loopback for an external reverse proxy. It does not prove DNS, TLS, proxy configuration, or service health.