Changing the ipcMain File in Electron - electron

Question

Hello i'm new to Electron and i want to split my code into separate files and i really would like to move my ipcMain.on Fucntions to another file from main.ts . How can i do that because i don't know if i move it to another file, how should i call it?
and is there any way to use mainWindow.webContents.send() inside another file?
main.ts
import { app, BrowserWindow, ipcMain } from 'electron';
import isDev from 'electron-is-dev';
import path from 'path';
import db from './database/database';
let mainWindow: BrowserWindow;
const createWindow = () => {
mainWindow = new BrowserWindow({
minWidth: 980,
minHeight: 600,
webPreferences: {
nodeIntegration: true,
},
frame: false,
});
mainWindow.loadURL(
isDev
? 'http://localhost:3000'
: `file://${path.join(__dirname, "../build/index.html")}`
);
mainWindow.webContents.openDevTools();
};
app.whenReady().then(createWindow);
app.on('window-all-closed', () => {
if (process.platform !== 'darwin') {
app.quit();
}
});
app.on('activate', () => {
if (BrowserWindow.getAllWindows().length === 0) {
createWindow();
}
});
ipcMain.on('mainWindow:close', () => {
db.close();
app.quit();
});
ipcMain.on('mainWindow:min', () => {
mainWindow.minimize();
});
ipcMain.on('mainWindow:max', () => {
if (mainWindow.isMaximized()) {
mainWindow.unmaximize();
}
else {
mainWindow.maximize();
}
});