Verify Signatures with Stellar Libraries

import { ParaStellarSigner } from "@getpara/stellar-sdk-v14-integration";
import { Networks, StrKey } from "@stellar/stellar-sdk";
import { useClient } from "@getpara/react-sdk";
import nacl from "tweetnacl";

function VerifySignature() {
  const para = useClient();

  const verifyMessage = async () => {
    if (!para) return;

    const signer = new ParaStellarSigner(para, Networks.PUBLIC);

    const message = "Hello, Stellar!";
    const messageBytes = Buffer.from(new TextEncoder().encode(message));

    // Sign the message
    const signature = await signer.signBytes(messageBytes);

    // Extract the raw Ed25519 public key from the Stellar G-address
    const publicKeyBytes = StrKey.decodeEd25519PublicKey(signer.address);

    // Verify the signature using tweetnacl
    const isValid = nacl.sign.detached.verify(
      new Uint8Array(messageBytes),
      new Uint8Array(signature),
      publicKeyBytes
    );

    console.log("Message:", message);
    console.log("Signature:", signature.toString("hex"));
    console.log("Signature valid:", isValid);
    console.log("Signer:", signer.address);

    return isValid;
  };

  return <button onClick={verifyMessage}>Sign & Verify Message</button>;
}