Sign Messages with Sui Libraries

Sign a Sui personal message to prove ownership of a Sui address without submitting a transaction. This is useful for authentication and off-chain verification.

Sign a Personal Message

The signer follows the Sui personal message standard: the message is wrapped in the PersonalMessage intent and hashed with blake2b before signing. signPersonalMessage returns the serialized signature.

import { useParaSuiSigner } from "@getpara/react-sdk";

function SignMessage() {
  const { suiSigner } = useParaSuiSigner();

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

    const message = new TextEncoder().encode("Hello, Sui!");
    const { signature } = await suiSigner.signPersonalMessage(message);

    console.log("Address:", suiSigner.address);
    console.log("Signature:", signature);
  };

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

The returned signature is the serialized Sui signature (base64(flag || signature || publicKey)). Verify it with the signer’s public key — see Verify Signatures.

Next Steps

Setup Libraries Verify Signatures

⌘I

Get Started

Set Up Project

Add Authentication

Build Wallet UI

Sign with Para

Transact on Chains

Manage Sessions

Add Advanced Features

Debug and Launch

Sign Messages with Sui Libraries

Sign a Personal Message

Next Steps

​Sign a Personal Message

​Next Steps

Sign a Personal Message

Next Steps