useParaSuiMultiSigSigner

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

import { useMemo } from "react";
import { useParaSuiMultiSigSigner } from "@getpara/react-sdk";
import { Ed25519Keypair } from "@mysten/sui/keypairs/ed25519";

function ParaMultiSig() {
  // The other co-signer(s). Real apps supply other wallets/devices; here we
  // generate one for the example.
  const coSigner = useMemo(() => new Ed25519Keypair(), []);

  const { multiSigSigner } = useParaSuiMultiSigSigner({
    otherMembers: [{ publicKey: coSigner.getPublicKey(), weight: 1 }],
    threshold: 2,
  });

  const sign = async () => {
    if (!multiSigSigner) return;

    // The multisig address — fund this / set it as a transaction sender.
    console.log("Multisig address:", multiSigSigner.address);

    const msg = new TextEncoder().encode("gm from a Para multisig");

    // Each member signs the same bytes independently.
    const { signature: paraPartial } = await multiSigSigner.signPersonalMessage(msg);
    const { signature: coPartial } = await coSigner.signPersonalMessage(msg);

    // Combine into one multisig signature (order-independent).
    const combined = multiSigSigner.combine([paraPartial, coPartial]);

    // Verify (or submit `combined` alongside the transaction bytes).
    const ok = await multiSigSigner.verifyPersonalMessage(msg, combined);
    console.log("Multisig signature valid:", ok);
  };

  return <button onClick={sign}>Sign with multisig</button>;
}