> ## 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

> Sign plain text messages for authentication or verification with Web3 libraries

Sign plain text messages using Para's secure signing infrastructure.

## Prerequisites

You need Web3 libraries configured with Para authentication.

<Card title="Setup Web3 Libraries" description="Configure Ethers.js, Viem, or Wagmi with Para before proceeding" href="/v3/react/guides/web3-operations/evm/setup-libraries" />

<Tabs>
  <Tab title="Ethers.js">
    ## Sign Personal Messages

    ```tsx theme={null}
    import { useParaEthersSigner, useParaEthersSignMessage } from "@getpara/react-sdk";
    import { JsonRpcProvider } from "ethers";

    const provider = new JsonRpcProvider("https://ethereum-sepolia-rpc.publicnode.com");

    function SignMessage() {
      const { ethersSigner } = useParaEthersSigner({ provider });

      const {
        signMessageAsync,
        isPending,
        data: signature,
      } = useParaEthersSignMessage(ethersSigner);

      return (
        <div>
          <button
            disabled={isPending}
            onClick={() => signMessage("Hello from Para!")}
          >
            {isPending ? "Signing..." : "Sign Message"}
          </button>
          {signature && <p>Signature: {signature.slice(0, 20)}...</p>}
        </div>
      );
    }
    ```

    ## Sign Structured Messages

    ```tsx theme={null}
    import { useParaEthersSigner, useParaEthersSignMessage } from "@getpara/react-sdk";
    import { JsonRpcProvider } from "ethers";

    const provider = new JsonRpcProvider("https://ethereum-sepolia-rpc.publicnode.com");

    function SignStructuredMessage() {
      const { ethersSigner } = useParaEthersSigner({ provider });

      const {
        signMessageAsync,
        isPending,
        data: signature,
      } = useParaEthersSignMessage(ethersSigner);

      const handleSign = () => {
        const data = {
          action: "authenticate",
          timestamp: Date.now(),
          nonce: Math.random().toString(36).substring(7),
        };
        signMessage(JSON.stringify(data, null, 2));
      };

      return (
        <div>
          <button onClick={handleSign} disabled={isPending}>
            {isPending ? "Signing..." : "Sign Structured Data"}
          </button>
          {signature && <p>Signature: {signature.slice(0, 30)}...</p>}
        </div>
      );
    }
    ```
  </Tab>

  <Tab title="Viem">
    ## Sign Personal Messages

    ```tsx theme={null}
    import { useParaViemClient, useParaViemSignMessage } from "@getpara/react-sdk";
    import { http } from "viem";
    import { sepolia } from "viem/chains";

    function SignMessage() {
      const { viemClient } = useParaViemClient({
        walletClientConfig: { chain: sepolia, transport: http() },
      });

      const {
        signMessageAsync,
        isPending,
        data: signature,
      } = useParaViemSignMessage(viemClient);

      return (
        <div>
          <button
            disabled={isPending}
            onClick={() => signMessage({ message: "Hello from Para!" })}
          >
            {isPending ? "Signing..." : "Sign Message"}
          </button>
          {signature && <p>Signature: {signature.slice(0, 20)}...</p>}
        </div>
      );
    }
    ```

    ## Sign Structured Messages

    ```tsx theme={null}
    import { useParaViemClient, useParaViemSignMessage } from "@getpara/react-sdk";
    import { http } from "viem";
    import { sepolia } from "viem/chains";

    function SignStructuredMessage() {
      const { viemClient } = useParaViemClient({
        walletClientConfig: { chain: sepolia, transport: http() },
      });

      const {
        signMessageAsync,
        isPending,
        data: signature,
      } = useParaViemSignMessage(viemClient);

      const handleSign = () => {
        const data = {
          action: "authenticate",
          timestamp: Date.now(),
          nonce: Math.random().toString(36).substring(7),
        };
        signMessage({ message: JSON.stringify(data, null, 2) });
      };

      return (
        <div>
          <button onClick={handleSign} disabled={isPending}>
            {isPending ? "Signing..." : "Sign Structured Data"}
          </button>
          {signature && <p>Signature: {signature.slice(0, 30)}...</p>}
        </div>
      );
    }
    ```
  </Tab>

  <Tab title="Wagmi">
    ## Sign Personal Messages

    ```typescript theme={null}
    import { useSignMessage } from "@getpara/react-sdk/wagmi";
    import { verifyMessage } from "viem";

    function SignMessage() {
      const { data: signature, isPending, signMessage } = useSignMessage();

      return (
        <div>
          <button
            onClick={() => signMessage({ message: "Hello from Para!" })}
            disabled={isPending}
          >
            {isPending ? "Signing..." : "Sign Message"}
          </button>
          {signature && <p>Signature: {signature.slice(0, 20)}...</p>}
        </div>
      );
    }
    ```

    ## Sign Structured Messages

    ```typescript theme={null}
    import { useSignMessage } from "@getpara/react-sdk/wagmi";

    function SignStructuredMessage() {
      const { signMessage, data: signature, isPending } = useSignMessage();

      const handleSign = () => {
        const data = {
          action: "authenticate",
          timestamp: Date.now(),
          nonce: Math.random().toString(36).substring(7)
        };
        signMessage({ message: JSON.stringify(data, null, 2) });
      };

      return (
        <div>
          <button onClick={handleSign} disabled={isPending}>
            {isPending ? "Signing..." : "Sign Structured Data"}
          </button>
          {signature && <p>Signature: {signature.slice(0, 30)}...</p>}
        </div>
      );
    }
    ```
  </Tab>
</Tabs>

## Next Steps

<CardGroup cols={3}>
  <Card title="Sign Typed Data" description="Sign EIP-712 structured data" href="/v3/react/guides/web3-operations/evm/sign-typed-data" icon="file-signature" />

  <Card title="Verify Signatures" description="Verify signatures and recover addresses" href="/v3/react/guides/web3-operations/evm/verify-signatures" icon="shield-check" />

  <Card title="Execute Transactions" description="Execute signed transactions" href="/v3/react/guides/web3-operations/evm/execute-transactions" icon="code" />
</CardGroup>