# Overview

Connect your dapp to Freighter Mobile using the [WalletConnect v2](https://docs.walletconnect.network/app-sdk/overview) protocol. All methods follow the standard JSON-RPC 2.0 request/response format over a WalletConnect session.

## Supported Chains

| Network          | Chain ID          |
| ---------------- | ----------------- |
| Mainnet (PUBLIC) | `stellar:pubnet`  |
| Testnet          | `stellar:testnet` |

## API Reference

| Method                                                                                  | Description                                                                                                                                         |
| --------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------- |
| [`stellar_signXDR`](/mobile-walletconnect/signing.md#stellar_signxdr)                   | Sign a transaction and return the signed XDR                                                                                                        |
| [`stellar_signAndSubmitXDR`](/mobile-walletconnect/signing.md#stellar_signandsubmitxdr) | Sign and submit a transaction to Horizon                                                                                                            |
| [`stellar_signMessage`](/mobile-walletconnect/signing.md#stellar_signmessage)           | Sign an arbitrary UTF-8 message ([SEP-53](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0053.md))                           |
| [`stellar_signAuthEntry`](/mobile-walletconnect/signing.md#stellar_signauthentry)       | Sign a Soroban authorization entry preimage (as defined in [SEP-43](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0043.md)) |

## Error Handling

All error responses use JSON-RPC 2.0 format with code `5000`:

```json
{
  "id": 1234567890,
  "jsonrpc": "2.0",
  "error": {
    "code": 5000,
    "message": "User rejected the request"
  }
}
```

{% hint style="warning" %}
Freighter Mobile validates that the `chainId` in the request matches the wallet's active network. If the user is on the wrong network, the request is rejected. Always specify `chainId` as a separate argument to `provider.request()`, not inside `params`.
{% endhint %}

## Security

Freighter Mobile uses **Blockaid** scanning to protect users:

| Scan type            | When it runs                                                  |
| -------------------- | ------------------------------------------------------------- |
| **Site scan**        | Once during WalletConnect session connection                  |
| **Transaction scan** | For `stellar_signXDR` and `stellar_signAndSubmitXDR` requests |

`stellar_signMessage` and `stellar_signAuthEntry` do not trigger additional scans — the site was already scanned during connection.

## See also

* [WalletConnect v2 Docs](https://docs.walletconnect.network/app-sdk/overview)
* [Stellar Smart Contracts Auth](https://developers.stellar.org/docs/smart-contracts/guides/auth/authorization)
* [SEP-53: Message Signing](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0053.md)
* [SEP-43: Auth Entry Signing](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0043.md)


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