Welcome to cryptosapp!

CryptoSapp is a chatbot which comes to facilitate transactions with a crypto wallet.

How to use it

As simple as scanning a QR code. We will take care of the rest! You can also follow this link.

Once the QR is scanned, you will be redirected to Whatsapp with our chatbot, where you will be able to create your own wallet.

A brief example of the capabilities of our bot:

Run it in local

You should have installed vercel-cli

• Setup you project in vercel adding the env variables of the .env.example
• run

npm run start

and this will populate your env variables and deploy a lambda function poiting to your local environment.

Endpoints

this project is composed of lambdas deployed in Vercel, with the following endpoints

• /whatsapp this endpoints listens to whatsapp API notifications, each time a message is sent, this enpoint is called _ GET method is used for the challenge, to validate when creating webhook from facebook dashboard _ POST is used for receiving notifications. Notifications are then redirected to /whatsapp/message to answer quickly to the request and asynchronously handling all side effects

  # Set up
  

  in .env.example you'll se all environment variables needed for the project

To configure the project, you'll need to set up

• whatsapp bussiness acount
• an application in developers.facebook.com

Whatsapp and Meta accounts

1. Go to facebook's business dashboard, log in and create a new bussiness account. You can do this by clicking in the account's dropdown in the top-left and clicking Create new business account and enter all the data requested.
2. Now go to Accounts / Whatsapp accounts and click in Add and enter a phone number. This has to be a phone number without a personal whatsapp account already registered. Copy the phone number in the env variable WA_BUSSINESS_PHONE_NUMBER(5) without "+". i.e +54 9 11 24080127 would be 5491124080126 for an argentine number. Note the 9 is added.
3. Go to developers.facebook.com and register a facebook developer account if you don't have one already from your personal facebook account (you'll just need to accept terms and conditions)
4. in https://developers.facebook.com/apps go to Create App, select Bussiness, enter a name for your application and select you bussiness account you just created in the dropdown.
5. Click on "Set up" in the Whatsapp product, and then click on the "Start using the API" blue button.
6. In the "Send and receive messages" section, in the "From" dropdown, you should be able to see the phone you configured in the previous step, select it and copy the "Phone number ID", this will be set in the environment variable META_WA_SENDER_PHONE_NUMBER_ID(6). Also besides that, you should be able to see "WhatsApp Business Account ID". You'll copy this value and set it to the env META_WA_WABA_ID(7)
7. Now we'll generate the access token to send messages from our api. In whatsapp business dashboard, go to System users. here click on Add, set a name and set "Admin" as role. Now click on Add Assets to the user. Select the Apps tab and select the app you recently created. Toggle the "Manage app" to give total access switch to give all permissions, and save.
8. Now click on Generate new token, select the app, and check this permissions: _ bussiness_management _ whatsapp_business_messaging * whatsapp_business_management and click on create token.
9. Copy the access token in the META_WA_ACCESS_TOKEN(8) variable
10. In facebook developers dashboard select you application and in the side bar, look for Configuration in the Whatsapp section. Here You'll see a "Webhooks" section.
11. Click Edit. Here you'll be prompted to enter a callback url. This will be the url the API is deployed on, wich will also be https://{VERCEL_PROD_URL}/api/whatsapp, and in the verify token field set a custom password you want, and also set it in META_WA_VERIFY_TOKEN(9). If your API is running, you'll be able to solve the challenge and the webhook will be created.