> For the complete documentation index, see [llms.txt](https://qed-vault.gitbook.io/qed-vault/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://qed-vault.gitbook.io/qed-vault/5.-implementation-details.md).

# 5. Implementation Details

**5.1 Setting Up the Fabric Network**

1. **Prerequisites**: Docker, Docker Compose, Go, Node.js.
2. **Network Configuration**: Define the network topology, including peers and orderers in a YAML file.
3. **Chaincode Development**: Write chaincode in Go or Node.js to implement business logic.
4. **Deployment**: Use the Hyperledger Fabric CLI or SDK to deploy the network and chaincode.

**5.2 Smart Contract Design**

* **Data Structures**: Define structures representing assets or entities.
* **Functions**: Implement functions for creating, updating, and querying data.
* **Access Control**: Implement access control to restrict certain operations based on user roles.