Example Joi validator for Moleculer

joi-validator.js

"use strict";

let ServiceBroker = require("../src/service-broker");
let BaseValidator = require("../src/validator");
let { ValidationError } = require("../src/errors");

// --- JOI VALIDATOR CLASS ---
class JoiValidator extends BaseValidator {
    constructor() {
        super();
        this.validator = require("joi");
    }

    compile(schema) {
        return (params) => this.validate(params, schema);
    }

    validate(params, schema) {
        const res = this.validator.validate(params, schema);
        if (res.error)
            throw new ValidationError(res.error.message, null, res.error.details);

        return true;
    }
}

let broker = new ServiceBroker({
    logger: true,
    validation: true,
    validator: new JoiValidator()
});

// --- TEST BROKER ---
let Joi = require("joi");

broker.createService({
    name: "greeter",
    actions: {
        hello: {
            params: Joi.object().keys({
                name: Joi.string().min(4).max(30).required()
            }),
            handler(ctx) {
                return `Hello ${ctx.params.name}`;
            }
        }
    }
});

broker.start()
    .then(() => broker.call("greeter.hello").then(res => broker.logger.info(res)))
    .catch(err => broker.logger.error(err.message, err.data))
    .then(() => broker.call("greeter.hello", { name: 100 }).then(res => broker.logger.info(res)))
    .catch(err => broker.logger.error(err.message, err.data))
    .then(() => broker.call("greeter.hello", { name: "Joe" }).then(res => broker.logger.info(res)))
    .catch(err => broker.logger.error(err.message, err.data))
    .then(() => broker.call("greeter.hello", { name: "John" }).then(res => broker.logger.info(res)))
    .catch(err => broker.logger.error(err.message, err.data));

Could you demo for it, please? I had problem version v17.x.x the package Joi is validate function not found. Please send for package.json