gistfile1.txt

https://developers.facebook.com/docs/whatsapp/on-premises/overview

BSP: Business Solution Provider
WhatsApp Business Platform On-Premises API

Requirements:
- Display name:
  1. how to set it up: https://www.facebook.com/business/help/338047025165344/
  2. the formatting guidelines: https://www.facebook.com/business/help/757569725593362
  3. updating it: https://www.facebook.com/business/help/378834799515077
- a phone number associated with your business account
- a Meta Business Manager:
  1. https://www.facebook.com/business/help/1710077379203657
- a WhatsApp Business Account (WABA)
  two types: 
    a) the default business account
    b) an official business account
  create account: https://www.facebook.com/business/help/2087193751603668
  create account with BSP via Meta Business Manager: https://www.facebook.com/business/help/524220081677109
  
Migration guide: 

Install
	https://developers.facebook.com/docs/whatsapp/on-premises/get-started/installation/prod-multiconnect#install-docker
	https://github.com/WhatsApp/WhatsApp-Business-API-Setup-Scripts?fbclid=IwAR0RLVrpksCn3Gj8GLUBsXYGUuN490cnm1nkpZfjL0k3gseKxAvBykbWE9A

Tokens
	login------------->Server
	bearer Token<________╱	

Expiration:
		after certain time
		after logout

	Request (expired token) ---> Server
									(401)<________╱	

Headers
	username:password as base64(String)
	∴
	Authorization: Basic YWRtaW46c2VjcmV0.
	
API Keys
	client----------(api_key)---->server
	   health, metrics, and stats<__╱
	   
	Client-----(api_key)--->Server
			Method,Url,Headers,Body

Whatsapp Business API Responses:
	HTTP Status Code
	Payload (on success)
	Meta (like a fingerprint version of api)
	Errors
	
Whatsapp Business API Architecture

[Database]					[Media Volume]
    |                  |
    +------------------+
    |									 |             _________
[WebApp]<------------>[Core App]<-->[WA Servers
    |											|          ---------
	  | 										|
 _________________        |
[Business Servers ]-------+ 
|									|
|_________________]