feat: implement bitcoin core block hash zmq sub

Block data will be published to sse/subscribe SSE endpoint

app/repositories/bitcoin.py

@@ -1,11 +1,12 @@
+import asyncio
 import binascii
 import json
-from hashlib import sha256
 
 import zmq
 import zmq.asyncio
 from app.utils import bitcoin_config, bitcoin_rpc_async
 from fastapi import Request
+from fastapi_plugins import redis_plugin
 
 
 async def handle_block_sub(request: Request,  verbosity: int = 1) -> str:
@@ -24,3 +25,22 @@ async def handle_block_sub(request: Request,  verbosity: int = 1) -> str:
         hash = binascii.hexlify(body).decode('utf-8')
         r = await bitcoin_rpc_async('getblock', [hash, verbosity])
         yield json.dumps(r["result"])
+
+
+async def handle_block_sub_redis(verbosity: int = 1) -> str:
+    ctx = zmq.asyncio.Context()
+    zmq_socket = ctx.socket(zmq.SUB)
+    zmq_socket.setsockopt(zmq.RCVHWM, 0)
+    zmq_socket.setsockopt_string(zmq.SUBSCRIBE, "hashblock")
+    zmq_socket.connect(bitcoin_config.zmq_url)
+
+    while True:
+        _, body, _ = await zmq_socket.recv_multipart()
+        hash = binascii.hexlify(body).decode('utf-8')
+        r = await bitcoin_rpc_async('getblock', [hash, verbosity])
+        await redis_plugin.redis.publish("default", json.dumps(r["result"]))
+
+
+async def register_bitcoin_zmq_sub():
+    loop = asyncio.get_event_loop()
+    loop.create_task(handle_block_sub_redis())

app/utils.py

@@ -1,8 +1,8 @@
-from app.routers import bitcoin
+import json
 from types import coroutine
+
 import aiohttp
 import requests
-import json
 from decouple import config
 
 

main.py

@@ -1,3 +1,4 @@
+from app.repositories.bitcoin import register_bitcoin_zmq_sub
 from aioredis import Channel, Redis
 from fastapi import FastAPI, Depends
 from fastapi_plugins import (get_config, depends_redis, registered_configuration,
@@ -25,6 +26,7 @@ app.include_router(system.router)
 async def on_startup() -> None:
     await redis_plugin.init_app(app, config=config)
     await redis_plugin.init()
+    await register_bitcoin_zmq_sub()
 
 
 @app.on_event('shutdown')