gossip fixes

src/blockdb/__init__.py

@@ -14,10 +14,6 @@ def add_block_to_db(block: Block):
     # Raises db.DuplicateKey if dupe
     db.set_if_new(block_db_path, block.id, block.raw)
 
-    for func in block_storage_observers:
-        func(block)
-
-
 def get_blocks_by_type(block_type: str) -> "Generator[Block]":
     block_db = db.get_db_obj(block_db_path, 'u')
     for block_hash in db.list_keys(block_db_path):

src/gossip/client/dandelionstem/__init__.py

@@ -84,7 +84,7 @@ async def stem_out(d_phase: 'DandelionPhase'):
 
     def blackhole_protection(q):
         for bl in q:
-            add_block_to_db(q)
+            add_block_to_db(bl)
 
 
     # Spawn threads with deep copied block queue to add to db after time
@@ -122,7 +122,7 @@ async def stem_out(d_phase: 'DandelionPhase'):
                 logger.error(
                     "Did not stem out any blocks in time, " +
                     "if this happens regularly you may be under attack",
-                    terminal=True)
+                    terminal=False)
                 for s in peer_sockets:
                     if s:
                         s.close()

src/gossip/client/dandelionstem/stemstream.py

@@ -1,3 +1,5 @@
+from asyncio import sleep
+from queue import Empty
 from typing import TYPE_CHECKING
 
 import logger
@@ -22,7 +24,14 @@ async def do_stem_stream(
         while remaining_time > 5 and my_phase_id == d_phase.phase_id:
             # Primary client component that communicate's with gossip.server.acceptstem
             remaining_time = d_phase.remaining_time()
-            bl: 'Block' = block_queue.get(block=True, timeout=remaining_time)
+            while remaining_time:
+                try:
+                    # queues can't block because we're in async
+                    bl = block_queue.get(block=False)
+                except Empty:
+                    await sleep(1)
+                else:
+                    break
             logger.info("Sending block over dandelion++", terminal=True)
 
             block_size = str(len(bl.raw)).zfill(BLOCK_SIZE_LEN)

src/gossip/client/streamblocks.py

@@ -5,6 +5,7 @@ Download blocks that are being diffused
 doesn't apply for blocks in the gossip queue that are awaiting
 descision to fluff or stem
 """
+from ast import Index
 from threading import Thread, Semaphore
 from random import SystemRandom
 from time import sleep
@@ -120,6 +121,12 @@ def stream_from_peers():
     while True:
         need_socket_lock.acquire()
         available_set = gossip_peer_set - tried_peers
+        if not len(available_set) and len(tried_peers):
+            try:
+                tried_peers.pop()
+            except IndexError:
+                pass
+            available_set = gossip_peer_set - tried_peers
         peers = sys_rand.sample(
             available_set,
             min(MAX_STREAMS, len(available_set)))
@@ -137,3 +144,4 @@ def stream_from_peers():
             except IndexError:
                 need_socket_lock.release()
                 break
+            

src/gossip/constants.py

@@ -14,4 +14,4 @@ MAX_INBOUND_DANDELION_EDGE = 50  # Mainly picked to avoid slowloris
 OUTBOUND_DANDELION_EDGES = 2
 
 MAX_STEM_BLOCKS_PER_STREAM = 1000
-BLACKHOLE_EVADE_TIMER_SECS = DANDELION_EPOCH_LENGTH * 3
+BLACKHOLE_EVADE_TIMER_SECS = 10

src/gossip/server/diffuseblocks.py

@@ -20,6 +20,7 @@ from ..constants import BLOCK_MAX_SIZE, BLOCK_SIZE_LEN
 from ..constants import BLOCK_STREAM_OFFSET_DIGITS
 
 import logger
+import blockdb
 from blockdb import get_blocks_after_timestamp, block_storage_observers
 """
 This program is free software: you can redistribute it and/or modify
@@ -53,13 +54,7 @@ async def diffuse_blocks(reader: 'StreamReader', writer: 'StreamWriter'):
         raise ValueError(
             "Peer's specified time offset skewed too far into the future")
 
-    newly_stored_blocks = Queue()
 
-    def _add_to_queue(bl):
-        newly_stored_blocks.put_nowait(bl)
-    block_storage_observers.append(
-        _add_to_queue
-    )
 
     async def _send_block(block: 'Block'):
         writer.write(block.id)
@@ -90,17 +85,20 @@ async def diffuse_blocks(reader: 'StreamReader', writer: 'StreamWriter'):
                 )
             except IncompleteReadError:
                 keep_writing = False
+        time_offset = time()
 
         # Diffuse blocks stored since we started this stream
         while keep_writing:
-            await _send_block(await newly_stored_blocks.get())
+            bls = blockdb.get_blocks_after_timestamp(time_offset)
+            for bl in bls:
+                await _send_block(bl)
                 try:
                     keep_writing = bool(
                         int.from_bytes(await reader.readexactly(1), 'big')
                     )
                 except IncompleteReadError:
                     keep_writing = False
+                    break
     except Exception:
         logger.warn(traceback.format_exc(), terminal=True)
 
-    block_storage_observers.remove(_add_to_queue)

src/httpapi/addblock/__init__.py

@@ -8,6 +8,7 @@ import secrets
 from flask import Blueprint, Response, request
 
 from onionrblocks import Block
+import blockdb
 
 import logger
 from gossip import blockqueues
@@ -38,6 +39,7 @@ def block_serialized():
     req_data = request.data
     block_id = req_data[:BLOCK_ID_SIZE]
     block_data = req_data[BLOCK_ID_SIZE:]
-    blockqueues.gossip_block_queues[stream_to_use].put(
+    blockdb.add_block_to_db(Block(block_id, block_data, auto_verify=False))
-        Block(block_id, block_data, auto_verify=False))
+    #blockqueues.gossip_block_queues[stream_to_use].put(
+    #Block(block_id, block_data, auto_verify=False), block=False)
     return "ok"