diff --git a/CHANGELOG b/CHANGELOG
index 3ea16ec..2c9f207 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,6 @@
+* 0.3.7
+	- Remove hard eth dependency in settings rendering
+	- Add unlock cli tool
 * 0.3.6
 	- Add cli arg processing and settings renderer
 * 0.3.5
diff --git a/MANIFEST.in b/MANIFEST.in
index b31f9aa..9729f77 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1 +1 @@
-include *requirements.txt LICENSE.txt
+include *requirements.txt LICENSE.txt chainsyncer/data/config/*
diff --git a/chainsyncer/cli/arg.py b/chainsyncer/cli/arg.py
index ed367e9..d3e680a 100644
--- a/chainsyncer/cli/arg.py
+++ b/chainsyncer/cli/arg.py
@@ -10,3 +10,5 @@ def process_flags(argparser, flags):
     if flags & SyncFlag.HEAD > 0:
         argparser.add_argument('--head', action='store_true', help='Start from latest block as offset')
         argparser.add_argument('--keep-alive', action='store_true', help='Do not stop syncing when caught up')
+
+    argparser.add_argument('--backend', type=str, help='Backend to use for state store')
diff --git a/chainsyncer/cli/config.py b/chainsyncer/cli/config.py
index 614561d..266161b 100644
--- a/chainsyncer/cli/config.py
+++ b/chainsyncer/cli/config.py
@@ -4,6 +4,9 @@ from chainsyncer.cli import SyncFlag
 
 def process_config(config, args, flags):
         args_override = {}
+
+        args_override['SYNCER_BACKEND'] = getattr(args, 'backend')
+
         if flags & SyncFlag.RANGE:
             args_override['SYNCER_OFFSET'] = getattr(args, 'offset')
             args_override['SYNCER_LIMIT'] = getattr(args, 'until')
diff --git a/chainsyncer/data/config/syncer.ini b/chainsyncer/data/config/syncer.ini
index 3ce5021..bd6ab4c 100644
--- a/chainsyncer/data/config/syncer.ini
+++ b/chainsyncer/data/config/syncer.ini
@@ -1,3 +1,4 @@
 [syncer]
 offset = 0
 limit = 0
+backend = mem
diff --git a/chainsyncer/runnable/lock.py b/chainsyncer/runnable/lock.py
new file mode 100644
index 0000000..e31e383
--- /dev/null
+++ b/chainsyncer/runnable/lock.py
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# standard imports
+import os
+import logging
+import sys
+import importlib
+
+# external imports
+import chainlib.cli
+
+# local imports
+import chainsyncer.cli
+from chainsyncer.settings import ChainsyncerSettings
+
+logging.basicConfig(level=logging.WARNING)
+logg = logging.getLogger()
+
+
+arg_flags = chainlib.cli.argflag_std_base | chainlib.cli.Flag.CHAIN_SPEC
+argparser = chainlib.cli.ArgumentParser(arg_flags)
+argparser.add_argument('--state-dir', type=str, dest='state_dir', help='State directory')
+argparser.add_argument('--session-id', type=str, dest='session_id', help='Session id for state')
+argparser.add_argument('--action', type=str, choices=['repeat', 'continue'], help='Action to take on lock. Repeat means re-run the locked filter. Continue means resume execution for next filter.')
+argparser.add_positional('tx', type=str, help='Transaction hash to unlock')
+
+sync_flags = chainsyncer.cli.SyncFlag.RANGE | chainsyncer.cli.SyncFlag.HEAD
+chainsyncer.cli.process_flags(argparser, sync_flags)
+
+args = argparser.parse_args()
+
+base_config_dir = chainsyncer.cli.config_dir,
+config = chainlib.cli.Config.from_args(args, arg_flags, base_config_dir=base_config_dir)
+config = chainsyncer.cli.process_config(config, args, sync_flags)
+config.add(args.state_dir, '_STATE_DIR', False)
+config.add(args.session_id, '_SESSION_ID', False)
+logg.debug('config loaded:\n{}'.format(config))
+
+settings = ChainsyncerSettings()
+settings.process_sync_backend(config)
+
+
+def main():
+    state_dir = None
+    if settings.get('SYNCER_BACKEND') == 'mem':
+        raise ValueError('cannot unlock volatile state store')
+
+    if settings.get('SYNCER_BACKEND') == 'fs': 
+        syncer_store_module = importlib.import_module('chainsyncer.store.fs')
+        syncer_store_class = getattr(syncer_store_module, 'SyncFsStore')
+    elif settings.get('SYNCER_BACKEND') == 'rocksdb':
+        syncer_store_module = importlib.import_module('chainsyncer.store.rocksdb')
+        syncer_store_class = getattr(syncer_store_module, 'SyncRocksDbStore')
+    else:
+        syncer_store_module = importlib.import_module(settings.get('SYNCER_BACKEND'))
+        syncer_store_class = getattr(syncer_store_module, 'SyncStore')
+        
+    state_dir = os.path.join(config.get('_STATE_DIR'), settings.get('SYNCER_BACKEND'))
+    sync_path = os.path.join(config.get('_SESSION_ID'), 'sync', 'filter')
+    sync_store = syncer_store_class(state_dir, session_id=sync_path)
+
+    logg.info('session is {}'.format(sync_store.session_id))
+
+
+if __name__ == '__main__':
+    main()
diff --git a/chainsyncer/settings.py b/chainsyncer/settings.py
index d2439d7..a3050e6 100644
--- a/chainsyncer/settings.py
+++ b/chainsyncer/settings.py
@@ -2,7 +2,6 @@
 import logging
 
 # external imports
-from chainlib.eth.block import block_latest
 from hexathon import (
         to_int as hex_to_int,
         strip_0x,
@@ -13,8 +12,17 @@ logg = logging.getLogger(__name__)
 
 class ChainsyncerSettings:
 
+    def __init__(self):
+        self.o = {}
+        self.get = self.o.get
+
+
+    def process_sync_backend(self, config):
+        self.o['SYNCER_BACKEND'] = config.get('SYNCER_BACKEND')
+
+
     def process_sync_range(self, config):
-        o = block_latest()
+        o = self.o['SYNCER_INTERFACE'].block_latest()
         r = self.o['RPC'].do(o)
         block_offset = int(strip_0x(r), 16) + 1
         logg.info('network block height at startup is {}'.format(block_offset))
diff --git a/chainsyncer/store/fs.py b/chainsyncer/store/fs.py
index 8436d10..cbd6b7e 100644
--- a/chainsyncer/store/fs.py
+++ b/chainsyncer/store/fs.py
@@ -33,9 +33,13 @@ class SyncFsStore(SyncStore):
         factory = SimpleFileStoreFactory(base_sync_path, binary=True)
         self.setup_sync_state(factory, state_event_callback)
 
+        self.setup_filter_state(callback=filter_state_event_callback)
+
+
+    def setup_filter_state(self, callback=None):
         base_filter_path = os.path.join(self.session_path, 'filter')
         factory = SimpleFileStoreFactory(base_filter_path, binary=True)
-        self.setup_filter_state(factory, filter_state_event_callback)
+        super(SyncFsStore, self).setup_filter_state(factory, callback)
 
 
     def __create_path(self, base_path, default_path, session_id=None):
diff --git a/setup.cfg b/setup.cfg
index fa49265..b7709ab 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = chainsyncer
-version = 0.3.6
+version = 0.3.7
 description = Generic blockchain syncer driver
 author = Louis Holbrook
 author_email = dev@holbrook.no
@@ -28,6 +28,7 @@ packages =
 	chainsyncer.driver
 	chainsyncer.unittest
 	chainsyncer.store
+	chainsyncer.cli
 
 #[options.package_data]
 #* =