> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getpara.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Sign Messages with Para
> Learn how to sign a "Hello, Para!" message using the Para React Native SDK
The `signMessage` method is a **low-level API** that signs raw bytes directly without any modifications. This is useful for verifying your Para integration with a simple "Hello, Para!" test after initial setup and authentication.
**Important:** `signMessage` signs raw bytes without standard modifications like EIP-191 message prefixes that libraries like Ethers and Viem automatically add. For production use, always use proper Web3 libraries that handle message formatting, encoding standards, and chain-specific requirements.
**When to use signMessage:** This method is best suited for signing simple text messages and basic authentication flows. For complex operations like transactions, typed data (EIP-712), or chain-specific functionality, **you should use the appropriate Web3 library** (Viem, Ethers, Solana Web3.js, CosmJS). These libraries provide proper encoding, type safety, and chain-specific features that signMessage alone cannot offer.
## Message Signing
This method signs the exact bytes you provide — perfect for initial "hello world" testing:
boolean",
optional: true,
description: "A callback that returns a boolean, indicating whether the signing operation should be cancelled."
},
{
name: "onPoll",
type: "() => void",
optional: true,
description: "A callback function that will be invoked on each method poll."
},
{
name: "onCancel",
type: "() => void",
optional: true,
description: "A callback function that will be invoked if the method call is canceled."
}
]}
returns={{ type: "{ signMessage: (params) => void, signMessageAsync: (params) => Promise, data: FullSignatureRes | undefined, isPending: boolean, error: Error | null, reset: () => void }", description: "A mutation result with `signMessage` / `signMessageAsync` functions, `data`, and standard React Query mutation fields." }}
async={true}
/>
```tsx SignMessageExample.tsx theme={null}
import { useSignMessage, useWallet } from "@getpara/react-native-wallet";
import { View, Button, Alert } from "react-native";
export default function SignMessageExample() {
const { signMessageAsync, isPending } = useSignMessage();
const { data: wallet } = useWallet();
const handleSign = async () => {
if (!wallet) return;
const message = "Hello, Para!";
const messageBase64 = btoa(message);
try {
const result = await signMessageAsync({
walletId: wallet.id,
messageBase64,
});
Alert.alert("Signature", `0x${result.signature}`);
} catch (err) {
console.error("Failed to sign:", err);
}
};
return (
);
}
```
## Next Steps
Now that you've verified your Para setup, explore chain-specific libraries for more advanced operations: