> For the complete documentation index, see [llms.txt](https://quackai.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://quackai.gitbook.io/docs/developer-suite/developer-environment-setup.md).

# Developer Environment Setup

### Developer Environment Setup

| Component   | Environment Variables / Setup                  | Purpose                                 |
| ----------- | ---------------------------------------------- | --------------------------------------- |
| Facilitator | .env with RPC URLs, sponsor key, and whitelist | Runs verification and settlement        |
| Core SDK    | Client-side wallet integration                 | Generates signatures and headers        |
| Middleware  | API integration (Express/Hono)                 | Validates and settles incoming payments |
| Blockchain  | 7 EVM mainnets supporting EIP-7702             | Executes delegated transactions         |

All configurations, Docker scripts, and environment templates are available in the GitHub repo’s root and /packages directories.

### Supported Networks

| Chain             | ChainID | Relay Method                 | Implementation Contract                    | Status                |
| ----------------- | ------- | ---------------------------- | ------------------------------------------ | --------------------- |
| Ethereum          | 1       | EIP-7702                     | 0x8E67a64989CFcb0C40556b13ea302709CCFD6AaD | ✅ Live                |
| BNB Chain         | 56      | EIP-7702                     | 0x6cF4aD62C208b6494a55a1494D497713ba013dFa | ✅ Live                |
| Avalanche C-Chain | 43114   | EIP-7702                     | 0x96a8C74d95A35D0c14Ec60364c78ba6De99E9A4c | ✅ Live                |
| X Layer           | 196     | EIP-7702 + EIP-3009 fallback | 0x8D854436ab0426F5BC6Cc70865C90576AD523E73 | ✅ Live                |
| Mantle            | 5000    | EIP-7702                     | 0x2fb2B2D110b6c5664e701666B3741240242bf350 | ✅ Live                |
| Stable            | 988     | EIP-7702                     | 0x2fb2B2D110b6c5664e701666B3741240242bf350 | ✅ Live (USDT0 native) |
| Injective EVM     | 1776    | EIP-7702                     | 0x2fb2B2D110b6c5664e701666B3741240242bf350 | ✅ Live (USDT only)    |

Note: X Layer additionally supports legacy EIP-3009 fallback for USDC. Injective EVM ships USDT-only until Circle’s CCTP native USDC mainnet rollout (Q2 2026).

### Contributing & Support

* Contributions: See [CONTRIBUTING.md](https://github.com/bitgett/Q402-Institutional/blob/main/CONTRIBUTING.md)
* Issues: [GitHub Issues](https://github.com/bitgett/Q402-Institutional/issues)
* License: Apache 2.0
* Integration Queries: <business@quackai.ai>
* Community Support: Telegram + Discord (links on website)

### Quick Navigation

| Resource              | Purpose                           | Location                                                                               |
| --------------------- | --------------------------------- | -------------------------------------------------------------------------------------- |
| GitHub Repository     | Q402 core source code             | [github.com/bitgett/Q402-Institutional](https://github.com/bitgett/Q402-Institutional) |
| Quack AI Whitepaper   | Architecture & integration guides | quackai.gitbook.io/docs                                                                |
| Architecture Overview | Protocol design and flow diagrams | /docs/ARCHITECTURE.md in repo                                                          |

#### Summary

GitBook is your architectural and conceptual home — explaining how Q402, Governance, and RWA integrate into the AI Autonomy Stack.\
GitHub is your engineering workspace — hosting the live code, SDKs, facilitator logic, and deployment scripts.

Together, they provide a full-stack environment for developers, institutions, and autonomous agents to build intelligent, verifiable, and frictionless systems on-chain.