signMultipleMessages

This is an Xverse custom method. It can only be invoked for users using the Xverse wallet.

You can request your user to sign multiple messages with their wallet's Bitcoin addresses, by invoking the signMultipleMessages method.

This enables your app to prompt users to sign batches of messages in a single step, instead of requiring multiple individual signMessage calls and multiple wallet popups.

---

Request parameters

signMultipleMessages expects the request payload to be an array of message objects matching the schema below:

• address (required): a string representing the address to use to sign the message

• message (required): a string representing the message to be signed by the wallet

• protocol (optional): the signature protocol to use for this message (ECDSA or BIP322)

protocol (optional)

By default, signMultipleMessages will use two type of signatures depending on the Bitcoin address used for signing:

• ECDSA signatures over the secp256k1 curve when signing with the Bitcoin payment (p2sh) address

• BIP322 signatures when signing with the Bitcoin Ordinals (p2tr) address or a Ledger-based Bitcoin payment address (p2wpkh)

You have the option to specify your preferred signature type with the protocol parameter:

• ECDSA to request ECDSA signatures over the secp256k1 curve Available for payment addresses only (p2sh and p2wpkh)

• BIP322 to request BIP322 signatures Available for all payment (p2sh and p2wpkh) & ordinals addresses (p2tr)

---

Usage example

import { request, RpcErrorCode } from "sats-connect";

try {
  const response = await request("signMultipleMessages", [
    {
      address,
      message: "Message #1 to sign",
    },
    {
      address,
      message: "Message #2 to sign",
      protocol: "ECDSA",
    },
    {
      address,
      message: "Message #3 to sign",
      protocol: "BIP322",
    },
  ]);

  if (response.status === "success") {
    // handle success response
    // response.result
  } else {
    if (response.error.code === RpcErrorCode.USER_REJECTION) {
      // handle user request cancelation
    } else {
      // handle request error
    }
  }
} catch (err) {
  alert("Something Went Wrong");
}

---

Wallet prompt

The user will see a single message signing request prompt in the wallet, guiding them through the batch of messages to review and sign:

• Messages 1/N stepper

• Summary screen with Cancel / Sign all

• Option to review each message individually using ← / →

---

Response format

The signMultipleMessages method returns a Promise that resolves to an array of SignMessageResult objects.

• The array is returned in the same order as the request payload.

• Each item corresponds to the signed result for the message at the same index.

Each item in the response array contains:

• signature: a string representing the signed message

• messageHash: a string representing the hash of the message