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

# signMessage

> Function to sign messages using the connected Abstract Global Wallet.

The [AbstractClient](/abstract-global-wallet/agw-client/createAbstractClient)
includes a `signMessage` method that can be used to sign a message using the connected Abstract Global Wallet.
The method follows the [EIP-1271](https://eips.ethereum.org/EIPS/eip-1271) standard for contract signature verification.

<Card title="View Example Repository" icon="github" href="https://github.com/Abstract-Foundation/examples/tree/main/agw-signing-messages">
  View an example implementation of signing and verifying messages with AGW in a
  Next.js app.
</Card>

## Usage

<CodeGroup>
  ```tsx Signing (client-side) theme={null}
  import { useAbstractClient } from "@abstract-foundation/agw-react";

  export default function SignMessage() {
    const { data: agwClient } = useAbstractClient();

    async function signMessage() {
      if (!agwClient) return;

      // Alternatively, you can use Wagmi useSignMessage: https://wagmi.sh/react/api/hooks/useSignMessage
      const signature = await agwClient.signMessage({
        message: "Hello, Abstract!",
      });
    }
  }
  ```

  ```tsx Verifying (server-side) theme={null}
  import { createPublicClient, http } from "viem";
  import { abstractTestnet } from "viem/chains";

  // Create a public client to verify the message
  const publicClient = createPublicClient({
    chain: abstractTestnet,
    transport: http(),
  });

  // Verify the message
  const isValid = await publicClient.verifyMessage({
    address: walletAddress, // The AGW address you expect to have signed the message
    message: "Hello, Abstract!",
    signature,
  });
  ```
</CodeGroup>

## Parameters

<ResponseField name="message" type="string | Hex" required>
  The message to sign. Can be a string or a hex value.
</ResponseField>

<ResponseField name="account" type="Account" required>
  The account to sign the message with. Use the `account` from the
  [AbstractClient](/abstract-global-wallet/agw-client/createAbstractClient) to
  use the Abstract Global Wallet.
</ResponseField>

## Returns

Returns a `Promise<Hex>` containing the signature of the message.

## Verification

To verify a signature created by an Abstract Global Wallet, use the `verifyMessage` function from a public client:

```tsx theme={null}
```