Raiblocks add send block to account

send.js

//NOTE: Connection = promisified wrapper around RPC calls...methods map directly to RPC 'action' parameter
import Rai from '../server/util/rai'
const Connection = Rai('http://000.000.000.000', 7076) //node IP and port

const SENDER_XRB_WALLET_ADDRESS = 'xrb_...'
const RECEIVING_WALLET = 'xrb_...'
const SENDER_PUBLIC_WALLET_KEY = '....'

async function sendBlock() {
  try {
    //step 1: Get SENDER'S wallet's balance from acct. info
    const { balance } = await Connection.account_info(SENDER_XRB_WALLET_ADDRESS)

    //step 2: Get SENDER's wallet's most recent block hash
    const { hash } = (await Connection.account_history(
      SENDER_XRB_WALLET_ADDRESS
    )).history[0]

    //step 3: create new SEND block using SENDER's private wallet key
    const newBlock: {
      hash: string
      block: string
    } = await Connection.block_create({
      type: 'send',
      key: process.env.SENDER_PRIVATE_KEY,
      account: SENDER_XRB_WALLET_ADDRESS,
      destination: RECEIVING_WALLET,
      balance: balance,
      amount: '1000000000000',
      previous: hash
    })

    // step 5. perform proof of work on the newly created SEND block
    const powForBlock: string = await Connection.work_generate(newBlock.hash)

    // step 6. publish SEND block to the network??
    return Connection.publish({
        //pass stringified result of block_create with amount in hex??
        block: JSON.stringify(???)
    })
  } catch (err) {
    console.warn(err.message)
  }

  //step 2: using this hash from step 1, go do work and return checksum
}