diff --git a/lbry/wallet/orchstr8/node.py b/lbry/wallet/orchstr8/node.py
index d592f74f7..3987e777a 100644
--- a/lbry/wallet/orchstr8/node.py
+++ b/lbry/wallet/orchstr8/node.py
@@ -223,7 +223,7 @@ class SPVNode:
         # TODO: don't use os.environ
         os.environ.update(conf)
         self.server = Server(Env(self.coin_class))
-        self.server.mempool.refresh_secs = self.server.bp.prefetcher.polling_delay = 0.5
+        self.server.bp.mempool.refresh_secs = self.server.bp.prefetcher.polling_delay = 0.5
         await self.server.start()
 
     async def stop(self, cleanup=True):
diff --git a/lbry/wallet/server/block_processor.py b/lbry/wallet/server/block_processor.py
index 5ac14f4ee..5fe9663a0 100644
--- a/lbry/wallet/server/block_processor.py
+++ b/lbry/wallet/server/block_processor.py
@@ -23,6 +23,7 @@ from lbry.wallet.server.hash import hash_to_hex_str, HASHX_LEN
 from lbry.wallet.server.util import chunks, class_logger
 from lbry.crypto.hash import hash160
 from lbry.wallet.server.leveldb import FlushData
+from lbry.wallet.server.mempool import MemPool
 from lbry.wallet.server.db import DB_PREFIXES
 from lbry.wallet.server.db.claimtrie import StagedClaimtrieItem, StagedClaimtrieSupport
 from lbry.wallet.server.db.claimtrie import get_takeover_name_ops, StagedActivation, get_add_effective_amount_ops
@@ -174,11 +175,12 @@ class BlockProcessor:
         "reorg_count", "Number of reorgs", namespace=NAMESPACE
     )
 
-    def __init__(self, env, db: 'LevelDB', daemon, mempool, shutdown_event: asyncio.Event):
+    def __init__(self, env, db: 'LevelDB', daemon, shutdown_event: asyncio.Event):
+        self.state_lock = asyncio.Lock()
         self.env = env
         self.db = db
         self.daemon = daemon
-        self.mempool = mempool
+        self.mempool = MemPool(env.coin, daemon, db, self.state_lock)
         self.shutdown_event = shutdown_event
 
         self.coin = env.coin
@@ -210,10 +212,6 @@ class BlockProcessor:
         # Claimtrie cache
         self.db_op_stack: Optional[RevertableOpStack] = None
 
-        # If the lock is successfully acquired, in-memory chain state
-        # is consistent with self.height
-        self.state_lock = asyncio.Lock()
-
         # self.search_cache = {}
         self.history_cache = {}
         self.status_server = StatusServer()
diff --git a/lbry/wallet/server/mempool.py b/lbry/wallet/server/mempool.py
index 625649ac1..146378233 100644
--- a/lbry/wallet/server/mempool.py
+++ b/lbry/wallet/server/mempool.py
@@ -49,7 +49,7 @@ mempool_process_time_metric = Histogram(
 
 
 class MemPool:
-    def __init__(self, coin, daemon, db, refresh_secs=1.0, log_status_secs=120.0):
+    def __init__(self, coin, daemon, db, state_lock: asyncio.Lock, refresh_secs=1.0, log_status_secs=120.0):
         self.coin = coin
         self._daemon = daemon
         self._db = db
@@ -64,7 +64,7 @@ class MemPool:
         self.refresh_secs = refresh_secs
         self.log_status_secs = log_status_secs
         # Prevents mempool refreshes during fee histogram calculation
-        self.lock = asyncio.Lock()
+        self.lock = state_lock
         self.wakeup = asyncio.Event()
         self.mempool_process_time_metric = mempool_process_time_metric
         self.notified_mempool_txs = set()
diff --git a/lbry/wallet/server/server.py b/lbry/wallet/server/server.py
index ff7958872..24d8c395d 100644
--- a/lbry/wallet/server/server.py
+++ b/lbry/wallet/server/server.py
@@ -22,12 +22,11 @@ class Server:
 
         self.daemon = daemon = env.coin.DAEMON(env.coin, env.daemon_url)
         self.db = db = LevelDB(env)
-        self.mempool = mempool = MemPool(env.coin, daemon, db)
-        self.bp = bp = BlockProcessor(env, db, daemon, mempool, self.shutdown_event)
+        self.bp = bp = BlockProcessor(env, db, daemon, self.shutdown_event)
         self.prometheus_server: typing.Optional[PrometheusServer] = None
 
         self.session_mgr = LBRYSessionManager(
-            env, db, bp, daemon, mempool, self.shutdown_event
+            env, db, bp, daemon, self.shutdown_event
         )
         self._indexer_task = None
 
@@ -55,8 +54,8 @@ class Server:
         await _start_cancellable(self.bp.fetch_and_process_blocks)
 
         await self.db.populate_header_merkle_cache()
-        await _start_cancellable(self.mempool.keep_synchronized)
-        await _start_cancellable(self.session_mgr.serve, self.mempool)
+        await _start_cancellable(self.bp.mempool.keep_synchronized)
+        await _start_cancellable(self.session_mgr.serve, self.bp.mempool)
 
     async def stop(self):
         for task in reversed(self.cancellable_tasks):
diff --git a/lbry/wallet/server/session.py b/lbry/wallet/server/session.py
index a6d14c279..cc78dd1ef 100644
--- a/lbry/wallet/server/session.py
+++ b/lbry/wallet/server/session.py
@@ -176,14 +176,13 @@ class SessionManager:
         namespace=NAMESPACE, buckets=HISTOGRAM_BUCKETS
     )
 
-    def __init__(self, env: 'Env', db: LevelDB, bp: BlockProcessor, daemon: 'Daemon', mempool: 'MemPool',
-                 shutdown_event: asyncio.Event):
+    def __init__(self, env: 'Env', db: LevelDB, bp: BlockProcessor, daemon: 'Daemon', shutdown_event: asyncio.Event):
         env.max_send = max(350000, env.max_send)
         self.env = env
         self.db = db
         self.bp = bp
         self.daemon = daemon
-        self.mempool = mempool
+        self.mempool = bp.mempool
         self.shutdown_event = shutdown_event
         self.logger = util.class_logger(__name__, self.__class__.__name__)
         self.servers: typing.Dict[str, asyncio.AbstractServer] = {}