INSTALL.md

Installation

Spanish guide version here

The following document is intended to provide the necessary information to prepare the work environment for the development of the bot by providing the technical and physical characteristics of each element.

Table of contents

• Purpose
• Target
• Scope
• Technical requirements
• Prepare the environment
• Docker
• MongoDB
• P2plnbot
• Connect to the Lightning node

Purpose.

To allow people to trade with other people on Telegram using the Lightning network. The p2plnbot bot is developed in nodejs and connects to a LND (Lightning Network Daemon) node is a full implementation of a Lightning Network node.

Target.

Achieving that the telegram bot is able to receive payments Lightning without being custodian, that is; that the user will not need permission to use the service, or provide personal data that may compromise their privacy thereby achieving retain full custody of their goods at all times, for this the bot will use withheld invoices and only settle such invoices from the seller when each party agrees to it and just after that time the bot will pay the buyer's invoice.

Scope of the system.

Reach all users who require to acquire Bitcoin satoshis without custody through a bot on Telegram.

Technical requirements.

1. Computer with internet access.
2. Node Management System Polar.

3. Docker: deployment automation of applications as portable, self-contained containers that can be run in the cloud or locally.
4. MogoDB as a database manager.

Prepare the environment.

1. Check if you have Nodejs installed.

$ node -v

In case you do not have it installed:

• On Mac run the following instruction:

$ brew install node

• On Windows go to the following link
• On Linux:

$ sudo apt install npm

Docker

2. Create a directory where you will place the docker-compose.yml file for MongoDB with the following values:

mkdir mongodb
cd mongodb
mkdir db-data
vi docker-compose.yml

The file must contain the following:

version: "3.7"

services:
  mongodb:
    image: mongo:5.0
    environment:
      MONGO_INITDB_ROOT_USERNAME: mongoadmin
      MONGO_INITDB_ROOT_PASSWORD: secret
    volumes:
      - ./db-data/:/data/db
    ports:
      - 27017:27017

3. Check if Docker is up with the following instruction:

$ docker ps –a

Note: When executing the first command you will see the image you have created.

• Lift the container.

$ docker-compose up –d

• To enter the container, you must execute the following instructions:

$ docker ps –a

• This command will show you the ID that has been created to later enter the container:

$ docker exec -it <container id> /bin/bash

Note: Entering the container will allow you to enter the DB.

MongoDB

4. Login to MongoDB

$ mongo admin -u mongoadmin –p secret
$ show dbs
$ use nueva_db ej.

P2plnbot

5. Clone the repository of the bot:

$ git clone https://github.com/grunch/p2plnbot.git
$ cd p2plnbot
$ npm install

6. Create a .env file, in the root directory of the project, there is a sample file, so you only need to copy it and fill in some data:

• Execute the following instructions:

$ cp .env-sample .env
$ vi .env

Connect to the Lightning node.

• To connect to an lnd node, we need to set some variables:

LND_CERT_BASE64: TLS certificate of the LND node in base64 format, you can get it in base64 format. ~/.lnd/tls.cert | tr -d '\n' in the lnd node.

LND_MACAROON_BASE64: Macaron file in base64 format, the macaron file contains permission to perform actions on the lnd node, you can get it with base64 ~/.lnd/data/chain/bitcoin/mainnet /admin.macaroon | tr -d '\n',

• If you are using Polar you get the data as shown in the following image:

LND_GRPC_HOST: IP address or the domain name from the LND node and the port separated by a colon, e.g: 192.168.0.2:10009.

BOT_TOKEN: u will need to log in to Telegram and search for BotFather. Execute the menu and select Create a new bot where you will choose the name of the bot and the user, once gener ated it will show a token number that will be placed in this field.

CHANNEL: Create a channel in Telegram, to do this press the write new message button. On Android it is in the lower right corner with a round icon with a pencil, and on iOS it is in the upper right corner with a rather small icon in the shape of a pencil. Tap on the New channel option.

ADMIN_CHANNEL: This data will be the ID of your channel, to get it write a message in your channel, forward it to the bot @JsonDumpBot and it will show you a JSON with the channel ID.

• More information aquí.

• File .env

LND_CERT_BASE64=
LND_GRPC_HOST='127.0.0.1:10001'
BOT_TOKEN=''
FEE=.001
DB_USER='mongoadmin'
DB_PASS='secret'
DB_HOST='localhost'
DB_PORT='27017'
DB_NAME='p2plnbot'

INVOICE_EXPIRATION_WINDOW=60000
HOLD_INVOICE_EXPIRATION_WINDOW=60
CHANNEL='@yournewchannel' # channel created by you, the bot must be admin here
ADMIN_CHANNEL='-10******46' # Info dumped from the bot @JsonDumpBot

MAX_DISPUTES=8
HOLD_INVOICE_CLTV_DELTA=144
HOLD_INVOICE_CLTV_DELTA_SAFETY_WINDOW=12

PENDING_PAYMENT_WINDOW=5

FIAT_RATE_EP='https://api.yadio.io/rate'

• Once the file has been edited, execute the following instruction:

$ npm start

• For testing purposes:

$ npm test

Start with the bot.

• It will be necessary to have already created a bot with BotFather, to have another number to use with Telegram and to have opened channels in Polar.

1. You must start the bot with the same account with the command:

/start 

It will display a menu, we will choose the /sell option to sell with the necessary requirements.

2. In the channel you will see the offer, you must choose to buy with the other Telegram user.

3. Take the order in the channel. Click on Buy Satoshis.

4. Enter the bot and click continue.

This is the message that will be displayed.

5. Create invoice in Polar with some of the users and paste in Telegram. Choose Create Invoice in the behavior part.

6. Set the sales quantity.

7. Choose Copy and Close.

8. Enter the bot and paste the invoice.

A request for payment will be sent to the seller and will be displayed in the bot..

9. Paste the invoice in Polar and pay it.

10. When someone takes the order, the bot will display the following message:

11. The following will be displayed in the bot for the other user:

12. The user must release the funds with the command /fiatsent, to do this he must copy and paste with the id

13. The bot will indicate that the user has already sent the fiat money.

14. The user must release the funds with the /release command by copying and pasting with the id.

15. Finally, the buyer will be notified that the transaction has been successfully completed.