distributeXlm_des_as_src.js

const distributeXlm = async (masterAccount, amount, ...walletAccounts) => {
  console.log('distribute xlm')

  const transferFunc = async (master, destinationPublic, asset, amount) => {
    console.log('transfer', asset.code)
    let account = await server.loadAccount(destinationPublic)

    let transaction = new TransactionBuilder(account, { fee: 100 })
      .addOperation(
        Operation.payment({
          source: master.publicKey(),
          amount: `${amount}`,
          asset: asset,
          destination: destinationPublic,
        })
      )
      .addOperation(
        Operation.payment({
          source: master.publicKey(),
          amount: `${2*0.00001}`,
          asset: asset,
          destination: destinationPublic,
        })
      )
      .addMemo(Memo.text(`${Date.now()}`))
      .setTimeout(TimeoutInfinite)
      .build()

    transaction.sign(master)
    return server.submitTransaction(transaction)
  }

  txs = walletAccounts.map(w => transferFunc(masterAccount, w.publicKey(), Asset.native(), amount))
  await Promise.all(txs)
}