The code effectively serializes and deserializes data using Protobuf, ensuring data integrity and efficiency. It loads the Protobuf definition, verifies the payload, and converts it into a Protobuf message before encoding and decoding it. [protobuf sample code]

index.js

const protobuf = require('protobufjs');

// Load the generated Person class
const root = protobuf.loadSync('person.proto');
root.resolveAll();
// console.log("root ", root)
if (!root) {
    console.error('Failed to load person.proto');
    process.exit(1);
}
const Person = root.lookupType('Person');

// Payload
const payload = {
    name: 'Alice',
    id: 123,
    email: '[email protected]',
    cool: '123'
}

// Verify Payload
const err = Person.verify(payload);
if(err) {
    console.error('Invalid payload (not an object)');
    process.exit(1);
}

// conversion / filter - remove unwanted fileds from payload by comparing proto file
const fromObj = Person.fromObject(payload);
console.log("fromObj ", fromObj);

// Serialization
const person = Person.create(payload);
const buffer = Person.encode(person).finish();

// Deserialization
const decodedPerson = Person.decode(buffer);
console.log(decodedPerson.name);


// Simply do npm init and npm install protobufjs
// node index.js

person.proto

syntax = "proto3";

message Person {
  string name = 1;
  int32 id = 2;
  string email = 3;
}