[Epic] [Access] Enable websocket support for new streaming endpoints

[peterargue]

Why

Unblocks streaming endpoints for FCL and will improve user experience with faster transactions

To add support for these new gRPC streaming endpoints to FCL, we will need to add websocket endpoints

• blocks
• transaction statuses
• account statuses

How will we measure success

• Websocket support on ANs are released to testnet and ready for deployment on mainnet

DACI

D: Krok team
A: Peter
C: Flow team, Jeff
I: Flow team

Estimate: ~3 person months

Tasks

Beta Give feedback

1. [Access] Draft design of new WebSockets #6508
   S-Access +1
   
2. [Access] Implement DataProvider interface and factory of data providers #6584
   S-Access +1
   
3. [Access] Implement web socket handler for new web socket connection under /ws endpoint #6593
   S-Access +1
   
4. [Access] Implement new web socket controller component #6583
   S-Access +1
   

   
5. [Access] Implement web socket connection mock for unit testing of web socket controller #6635
   S-Access +1
6. [Access] Configure ws connection in ws controller #6638
   S-Access +1
7. [Access] Add client id for subscriptions #6637
   S-Access +1
8. [Access] Implement keepalive routine with ping-ponging to ws connection in ws controller #6639
   S-Access +1
9. [Access] Implement response limit tracker routine for ws controller #6640
   S-Access +1
10. [Access] Implement integration test for new websocket handler #6641
    S-Access +1
11. [Access] Design error handling for web socket connection #6642
    S-Access +1
12. [Access] Add examples for ws conn usages #6643
    S-Access +1
13. [Access] Add documentation for ws controller package #6644
    S-Access +1
14. [Access] Add implementation for blocks, block headers and block digests data providers #6585
    S-Access +1
    
15. [Access] Add implementation for accounts data providers #6587
    S-Access +1
16. [Access] Add implementation for events data providers #6588
    S-Access +1
17. [Access] Deprecate old streaming event websockets endpoint
18. [Access] Improve subscription Streamer functionality to graceful shutdown on demand #5561
    Preserve S-Access +2
    
19. [Access] Add implementation TransactionStatusSubscriptionHandler for transaction status subscription #6586
    S-Access +1
20. [Access] Pending response from send and subscribe should return immediately #6573
    Improvement S-Access +2
    
21. [Access] Improve SendAndSubscribe status handling #6574
    Improvement S-Access +2
    
22. [Access] Change SendAndSubscribe endpoint's MessageIndex to start at 0 #6575
    Improvement S-Access +2
    
23. [Access] Add appropriate error/response handling for each websocket request #6724
    +0
    

[Guitarheroua]

Here is investigation for future possible refactoring of current WebSocket: WebSocket Subscriptions with a Single Connection