> ## 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 Solana Libraries

> Sign text and binary messages using Solana Web3.js or Anchor with Para

export const Card = ({imgUrl, title, description, href, horizontal = false, newTab = false}) => {
  const [isHovered, setIsHovered] = useState(false);
  const handleClick = e => {
    e.preventDefault();
    if (newTab) {
      window.open(href, '_blank', 'noopener,noreferrer');
    } else {
      window.location.href = href;
    }
  };
  return <div className={`not-prose relative my-2 p-[1px] rounded-xl transition-all duration-300 ${isHovered ? 'bg-gradient-to-r from-[#FF4E00] to-[#874AE3]' : 'bg-gray-200'}`} onMouseEnter={() => setIsHovered(true)} onMouseLeave={() => setIsHovered(false)}>
      <a href={href} onClick={handleClick} className={`not-prose flex ${horizontal ? 'flex-row' : 'flex-col'} font-normal h-full bg-white overflow-hidden w-full cursor-pointer rounded-[11px] no-underline`}>
        {imgUrl && <div className={`relative overflow-hidden flex-shrink-0 ${horizontal ? 'w-[30%] rounded-l-[11px]' : 'w-full'}`} onClick={e => e.stopPropagation()}>
            <img src={imgUrl} alt={title} className="w-full h-full object-cover pointer-events-none select-none" draggable="false" />
            <div className="absolute inset-0 pointer-events-none" />
          </div>}
        <div className={`flex-grow px-6 py-5 ${horizontal ? 'w-[70%]' : 'w-full'} flex flex-col ${horizontal && imgUrl ? 'justify-center' : 'justify-start'}`}>
          {title && <h2 className="font-semibold text-base text-gray-800 m-0">{title}</h2>}
          {description && <div className={`font-normal text-gray-500 re leading-6 ${horizontal || !imgUrl ? 'mt-0' : 'mt-1'}`}>
              <p className="m-0 text-xs">{description}</p>
            </div>}
        </div>
      </a>
    </div>;
};

Sign messages to prove ownership of a Solana address without submitting a transaction. This is commonly used for authentication and verification purposes.

<Card title="Setup Solana Libraries First" description="You must complete the Solana library setup before signing messages" href="/v2/react/guides/web3-operations/solana/setup-libraries" horizontal />

<Tabs>
  <Tab title="@solana/kit">
    ```typescript theme={null}
    import { useParaSolanaSigner } from '@getpara/react-sdk';
    import { createSolanaRpc } from '@solana/kit';
    import { getUtf8Encoder } from '@solana/codecs-strings';
    import bs58 from 'bs58';

    const rpc = createSolanaRpc("https://api.mainnet-beta.solana.com");

    function SignMessage() {
      const { solanaSigner, isLoading } = useParaSolanaSigner({ rpc });

      const signMessage = async () => {
        if (!solanaSigner) return;

        const message = "Hello, Solana!";
        const messageBytes = new Uint8Array(getUtf8Encoder().encode(message));

        const signatureResult = await solanaSigner.signMessages([
          { content: messageBytes, signatures: {} }
        ]);

        const signatureBytes = signatureResult[0][solanaSigner.address];
        const signatureBase58 = bs58.encode(signatureBytes);

        return { message, signature: signatureBase58, signer: solanaSigner.address };
      };

      return <button onClick={signMessage}>Sign Message</button>;
    }
    ```
  </Tab>

  <Tab title="@solana/web3.js">
    ```typescript theme={null}
    import { useParaSolana } from './hooks/useParaSolana';
    import bs58 from 'bs58';

    function SignMessage() {
      const { signer } = useParaSolana();

      const signMessage = async () => {
        if (!signer) {
          console.error("No signer available. Connect wallet first.");
          return;
        }

        const message = "Hello, Solana!";
        const messageBytes = new TextEncoder().encode(message);

        const signature = await signer.signBytes(Buffer.from(messageBytes));
        const signatureBase58 = bs58.encode(signature);

        console.log("Message:", message);
        console.log("Signature:", signatureBase58);
        console.log("Signer:", signer.address);
      };

      return <button onClick={signMessage}>Sign Message</button>;
    }
    ```
  </Tab>

  <Tab title="Anchor">
    Signing messages with Anchor programs uses the same `useParaSolanaSigner` — the signer implements `MessagePartialSigner`:

    ```typescript theme={null}
    import { useParaSolanaSigner } from "@getpara/react-sdk";
    import { createSolanaRpc } from "@solana/kit";
    import { getUtf8Encoder } from "@solana/codecs";
    import bs58 from "bs58";

    const rpc = createSolanaRpc("https://api.devnet.solana.com");

    function SignMessage() {
      const { solanaSigner, isLoading } = useParaSolanaSigner({ rpc });

      const handleSign = async () => {
        if (!solanaSigner) return;

        const message = getUtf8Encoder().encode("Hello from Anchor + Para!");
        const [signatures] = await solanaSigner.signMessages([
          { content: message, signatures: {} },
        ]);
        const signatureBytes = signatures[solanaSigner.address];
        console.log("Signature:", bs58.encode(signatureBytes));
        console.log("Signer:", solanaSigner.address);
      };

      if (isLoading) return <p>Loading...</p>;
      return <button onClick={handleSign}>Sign Message</button>;
    }
    ```
  </Tab>
</Tabs>

## Next Steps

<CardGroup cols={3}>
  <Card title="Verify Signatures" description="Verify signed messages on-chain" href="/v2/react/guides/web3-operations/solana/verify-signatures" icon="shield-check" />

  <Card title="Execute Transactions" description="Sign and send transactions" href="/v2/react/guides/web3-operations/solana/execute-transactions" icon="paper-plane" />

  <Card title="Configure RPC" description="Set up custom RPC endpoints" href="/v2/react/guides/web3-operations/solana/configure-rpc" icon="server" />
</CardGroup>