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

# Networks

> Soneium Mainnet for production, Soneium Minato for testing. RPC endpoints, faucet, and chain configuration with viem and wagmi.

The Startale App SDK supports two networks today.

| Network         | Chain ID | Use for    |
| --------------- | -------- | ---------- |
| Soneium Mainnet | 1868     | Production |
| Soneium Minato  | 1946     | Testing    |

## Public RPC endpoints

| Network         | RPC URL                           |
| --------------- | --------------------------------- |
| Soneium Mainnet | `https://rpc.soneium.org/`        |
| Soneium Minato  | `https://rpc.minato.soneium.org/` |

These public endpoints are rate-limited and intended for development. For production traffic, run your own node or use an infrastructure partner. See the [Soneium builder docs](https://docs.soneium.org/docs/builders/overview) for the current options.

## Block explorers

| Network         | Explorer                                                                |
| --------------- | ----------------------------------------------------------------------- |
| Soneium Mainnet | [soneium.blockscout.com](https://soneium.blockscout.com/)               |
| Soneium Minato  | [soneium-minato.blockscout.com](https://soneium-minato.blockscout.com/) |

## Chain definitions

Both chains are exported by `viem/chains` and `wagmi/chains`:

```ts theme={null}
import { soneium, soneiumMinato } from 'wagmi/chains'
```

## Declaring supported chains

For the wagmi connector, the chain list comes from wagmi's `createConfig({ chains })` array. `startaleConnector()` derives `appChainIds` from it automatically:

```ts theme={null}
createConfig({
  chains: [soneium, soneiumMinato],
  transports: {
    [soneium.id]: http(),
    [soneiumMinato.id]: http(),
  },
  connectors: [startaleConnector({ /* ... */ })],
})
```

## Switching networks

Use wagmi's `useSwitchChain()` or the raw provider's `wallet_switchEthereumChain` method. The popup confirms the switch with the user before the chain changes.

```tsx theme={null}
import { useSwitchChain } from 'wagmi'

const { switchChain } = useSwitchChain()
switchChain({ chainId: 1946 })
```

Inside a Mini App, `wallet_switchEthereumChain` is forwarded by the SDK but the host may reject the request. The Startale App host controls the active chain; treat a rejection as a host-enforced constraint. See [Mini App wallet integration](/miniapps/wallet-integration) for the full constraint surface.

## Stablecoin

USDSC is the canonical stablecoin on Soneium.

| Network         | USDSC contract                               |
| --------------- | -------------------------------------------- |
| Soneium Mainnet | `0x3f99231dD03a9F0E7e3421c92B7b90fbe012985a` |
| Soneium Minato  | `0xF2c10dC1beB13ee96036DE3F922eA871Ff2e0A7e` |

See [Pay with USDSC](/app-sdk/pay-with-usdsc) for full transfer examples.

## Testnet ETH

For Soneium Minato testing, see the [Soneium faucets list](https://docs.soneium.org/docs/builders/tools/faucets) maintained by the Soneium team. It lists the current providers and their daily limits. If a faucet runs out, claim Sepolia ETH from any Ethereum testnet faucet and bridge it to Minato through the [Soneium Bridge](https://soneium.org/en/bridge/).

## Testnet USDSC

There is no public USDSC faucet on Soneium Minato today. If you need to test token interaction, you can deploy your own token.