diff --git a/chainsyncer/driver.py b/chainsyncer/driver.py
index 93fe446..655e467 100644
--- a/chainsyncer/driver.py
+++ b/chainsyncer/driver.py
@@ -3,14 +3,19 @@ import uuid
 import logging
 import time
 import signal
+import json
 
 # external imports
-import sqlalchemy
 from chainlib.eth.block import (
         block_by_number,
         Block,
         )
-from chainlib.eth.tx import receipt
+from chainlib.eth.tx import (
+        receipt,
+        transaction,
+        Tx,
+        )
+from chainlib.error import JSONRPCException
 
 # local imports
 from chainsyncer.filter import SyncFilter
@@ -129,13 +134,19 @@ class HeadSyncer(BlockPollSyncer):
         while True:
             try:
                 tx = block.tx(i)
+            except AttributeError:
+                o = transaction(block.txs[i])
+                r = conn.do(o)
+                tx = Tx(Tx.src_normalize(r), block=block)
             except IndexError as e:
                 logg.debug('index error syncer rcpt get {}'.format(e))
                 self.backend.set(block.number + 1, 0)
                 break
 
+            # TODO: Move specifics to eth subpackage, receipts are not a global concept
             rcpt = conn.do(receipt(tx.hash))
-            tx.apply_receipt(rcpt)
+            if rcpt != None:
+                tx.apply_receipt(Tx.src_normalize(rcpt))
     
             self.process_single(conn, block, tx)
             self.backend.reset_filter()
@@ -180,9 +191,13 @@ class HistorySyncer(HeadSyncer):
         block_number = height[0]
         block_hash = []
         o = block_by_number(block_number)
-        r = conn.do(o)
+        try:
+            r = conn.do(o)
+        # TODO: Disambiguate whether error is temporary or permanent, if permanent, SyncDone should be raised, because a historical sync is attempted into the future
+        except JSONRPCException:
+            r = None
         if r == None:
-            raise NoBlockForYou()
+            raise SyncDone() #NoBlockForYou()
         b = Block(r)
 
         return b
diff --git a/chainsyncer/filter.py b/chainsyncer/filter.py
index f2597dc..1b8b427 100644
--- a/chainsyncer/filter.py
+++ b/chainsyncer/filter.py
@@ -1,9 +1,6 @@
 # standard imports
 import logging
 
-# external imports
-import sqlalchemy
-
 # local imports
 from .error import BackendError
 
@@ -12,8 +9,7 @@ logg = logging.getLogger(__name__)
 
 class SyncFilter:
 
-    def __init__(self, backend, safe=True):
-        self.safe = safe
+    def __init__(self, backend):
         self.filters = []
         self.backend = backend
 
@@ -30,7 +26,7 @@ class SyncFilter:
         session = None
         try:
             session = self.backend.connect()
-        except sqlalchemy.exc.TimeoutError as e:
+        except TimeoutError as e:
             self.backend.disconnect()
             raise BackendError('database connection fail: {}'.format(e))
         i = 0
diff --git a/requirements.txt b/requirements.txt
index 248b898..dc64f8d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 confini~=0.3.6rc3
 semver==2.13.0
 hexathon~=0.0.1a7
-chainlib~=0.0.2a6
+chainlib~=0.0.2a15
diff --git a/setup.cfg b/setup.cfg
index 706ce68..35f862a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = chainsyncer
-version = 0.0.2a2
+version = 0.0.2a3
 description = Generic blockchain syncer driver
 author = Louis Holbrook
 author_email = dev@holbrook.no