# Configs

In the template, the app has already had a manifest config which is to determine the DApp's id, DApp's url based on the runtime environment. For example, the DApp's url is `localhost` in the development environment, however, it will be your [Github Pages](https://docs.github.com/en/pages/getting-started-with-github-pages/about-github-pages) in the production environment.

There are 2 methods to classify you configs. One is based on the runtime environment namely `development` and `production`. The other is based on the Solana network namely `devnet`, `testnet`, and `mainnet`.

## Runtime Environment

```typescript
import { env } from '@sentre/senhub'

// development -> npm start
// production -> npm run build
```

## Solana Network

```typescript
import { net, chainId } from '@sentre/senhub'

// devnet | testnet | mainnet
// 103 | 102 | 101
```