// SPDX-FileCopyrightText: © 2026 LEDGER SAS
// SPDX-License-Identifier: Apache-2.0

import { Networks, Transaction as StellarSdkTransaction, xdr } from '@stellar/stellar-sdk'

export function combine(
  transaction: string | xdr.TransactionEnvelope,
  signature: string,
  publicKey: string
): string {
  const unsignedTx = new StellarSdkTransaction(transaction, Networks.PUBLIC)
  unsignedTx.addSignature(publicKey, signature)
  return unsignedTx.toXDR()
}