paperclip-wallet/renderer/database.js

// In renderer process (web page).
const {ipcRenderer} = require('electron');

class Datatabse {
    constructor() {}

    getCounters() {
        var counters = ipcRenderer.sendSync('getJSONFile', 'counters.json');

        if (counters == null) {
            counters = {};    
        }

        return counters;
    }

    setCounters(counters) {
        ipcRenderer.sendSync('setJSONFile', 
        { 
            file: 'counters.json',
            data: counters
        });        
    }

    getWallets() {
        var wallets = ipcRenderer.sendSync('getJSONFile', 'wallets.json');

        if (!wallets) {
          wallets = { names: {} };
        }
  
        return wallets;
    }

    setWallets(wallets) {
        ipcRenderer.sendSync('setJSONFile', 
        { 
            file: 'wallets.json',
            data: wallets
        });        
    }

    getAddresses() {
        var addressBook = ipcRenderer.sendSync('getJSONFile', 'addresses.json');

        if (!addressBook) {
          addressBook = { names: {} };
        }
      
        return addressBook;
    }

    setAddresses(addresses) {
        ipcRenderer.sendSync('setJSONFile', 
        { 
            file: 'addresses.json',
            data: addresses
        });        
    }
}
          
// create new account variable
EthoDatatabse = new Datatabse();