xrpl-dev-portal/content/_code-samples/build-a-wallet/desktop-js/7_send-xrp.js

const { app, BrowserWindow, ipcMain } = require('electron')
const fs = require("fs");
const path = require('path')
const xrpl = require("xrpl")
const { initialize, subscribe, saveSaltedSeed, loadSaltedSeed } = require('./library/5_helpers')
const { sendXrp } = require('./library/7_helpers')

const TESTNET_URL = "wss://s.altnet.rippletest.net:51233"

const WALLET_DIR = 'Wallet'

const createWindow = () => {

    const appWindow = new BrowserWindow({
        width: 1024,
        height: 768,
        webPreferences: {
            preload: path.join(__dirname, 'view', '7_preload.js'),
        },
    })

    appWindow.loadFile(path.join(__dirname, 'view', '7_send-xrp.html'))

    return appWindow
}

const main = async () => {
    const appWindow = createWindow()

    if (!fs.existsSync(WALLET_DIR)) {
        // Create Wallet directory in case it does not exist yet
        fs.mkdirSync(path.join(__dirname, WALLET_DIR));
    }

    let seed = null;

    ipcMain.on('seed-entered', async (event, providedSeed) => {
        seed = providedSeed
        appWindow.webContents.send('open-password-dialog')
    })

    ipcMain.on('password-entered', async (event, password) => {
        if (!fs.existsSync(path.join(__dirname, WALLET_DIR , 'seed.txt'))) {
            saveSaltedSeed('../' + WALLET_DIR, seed, password)
        } else {
            seed = loadSaltedSeed('../' + WALLET_DIR, password)
        }

        const wallet = xrpl.Wallet.fromSeed(seed)

        const client = new xrpl.Client(TESTNET_URL)

        await client.connect()

        await subscribe(client, wallet, appWindow)

        await initialize(client, wallet, appWindow)

        ipcMain.on('send-xrp-action', (event, paymentData) => {
            sendXrp(paymentData, client, wallet).then((result) => {
                appWindow.webContents.send('send-xrp-transaction-finish', result)
            })
        })

    })

    // We have to wait for the application frontend to be ready, otherise
    // we might run into a race condition and the ope-dialog events
    // get triggered before the callbacks are attached
    appWindow.once('ready-to-show', () => {
        // If there is no seed present yet, ask for it, otherwise query for the password
        // for the seed that has been saved
        if (!fs.existsSync(path.join(__dirname, WALLET_DIR, 'seed.txt'))) {
            appWindow.webContents.send('open-seed-dialog')
        } else {
            appWindow.webContents.send('open-password-dialog')
        }
    })
}

app.whenReady().then(main)