diff --git a/src/dexorder/__init__.py b/src/dexorder/__init__.py
index 96c8019..41730fa 100644
--- a/src/dexorder/__init__.py
+++ b/src/dexorder/__init__.py
@@ -1,6 +1,6 @@
 # noinspection PyPackageRequirements
 from contextvars import ContextVar
-from datetime import datetime
+from datetime import datetime, timezone
 from decimal import Decimal
 from typing import Callable, Any
 
@@ -8,11 +8,19 @@ from web3 import AsyncWeb3
 
 dec = Decimal
 def now():
-    return datetime.utcnow()  # we use naive datetimes that are always UTC
+    return datetime.now(timezone.utc)
 
 def timestamp():
     return datetime.now().timestamp()
 
+def from_timestamp(ts):
+    return datetime.fromtimestamp(ts, timezone.utc)
+
+def from_isotime(string):
+    return datetime.fromisoformat(string).replace(tzinfo=timezone.utc)
+
+def minutely(dt: datetime):
+    return dt.replace(tzinfo=None).isoformat(timespec="minutes")
 
 # NARG is used in argument defaults to mean "not specified" rather than "specified as None"
 class _Token:
diff --git a/src/dexorder/base/chain.py b/src/dexorder/base/chain.py
index 18ca96b..6c86e47 100644
--- a/src/dexorder/base/chain.py
+++ b/src/dexorder/base/chain.py
@@ -2,7 +2,11 @@ import math
 # noinspection PyPackageRequirements
 from contextvars import ContextVar
 
+from async_lru import alru_cache
+
 import dexorder
+from dexorder import current_w3
+from dexorder.util import hexint
 
 
 class Blockchain:
@@ -55,16 +59,21 @@ current_chain = ContextVar[Blockchain]('current_chain')
 
 
 class BlockClock:
-    def __init__(self):
-        self.timestamp = 0
-        self.adjustment = 0
-
-    def set(self, timestamp):
-        self.timestamp = timestamp
-        self.adjustment = timestamp - dexorder.timestamp()
+    def __init__(self, block_timestamp=0, adjustment=None):
+        self.block_timestamp = block_timestamp if block_timestamp != 0 else dexorder.timestamp()
+        self.adjustment = 0 if block_timestamp == 0 \
+            else adjustment if adjustment is not None \
+            else block_timestamp - dexorder.timestamp()
 
+    @property
     def timestamp(self):
         return math.ceil(dexorder.timestamp() + self.adjustment)
 
-current_clock = ContextVar[BlockClock]('clock')  # current estimated timestamp of the blockchain. will be different than current_block.get().timestamp when evaluating time triggers in-between blocks
+current_clock = ContextVar[BlockClock]('clock')  # current estimated timestamp of the blockchain. will be different than current_block.get().timestamp when evaluating time triggers in-between blocks or for historical playbacks
 
+@alru_cache
+async def get_block_timestamp(blockhash) -> int:
+    response = await current_w3.get().provider.make_request('eth_getBlockByHash', [blockhash, False])
+    raw = hexint(response['result']['timestamp'])
+    # noinspection PyTypeChecker
+    return raw if type(raw) is int else hexint(raw)
diff --git a/src/dexorder/bin/datamain.py b/src/dexorder/bin/backfill_ohlc.py
similarity index 62%
rename from src/dexorder/bin/datamain.py
rename to src/dexorder/bin/backfill_ohlc.py
index e06c8d5..ded13f2 100644
--- a/src/dexorder/bin/datamain.py
+++ b/src/dexorder/bin/backfill_ohlc.py
@@ -1,56 +1,23 @@
 import logging
 import sys
 from asyncio import CancelledError
-from datetime import datetime
 
-from async_lru import alru_cache
-from web3.types import EventData
-
-from dexorder import blockchain, config, dec, current_w3
-from dexorder.base.ohlc import ohlcs, recent_ohlcs
-from dexorder.base.orderlib import Exchange
+from dexorder import blockchain, config
+from dexorder.base.ohlc import recent_ohlcs
 from dexorder.bin.executable import execute
 from dexorder.blockstate.blockdata import BlockData
 from dexorder.blockstate.db_state import DbState
 from dexorder.configuration import parse_args
 from dexorder.contract import get_contract_event
 from dexorder.database import db
+from dexorder.event_handler import handle_uniswap_swap
 from dexorder.memcache.memcache_state import RedisState, publish_all
 from dexorder.memcache import memcache
-from dexorder.pools import uniswap_price, Pools
 from dexorder.runner import BlockStateRunner
-from dexorder.util import hexint
 
 log = logging.getLogger('dexorder')
 
 
-@alru_cache
-async def get_block_timestamp(blockhash) -> int:
-    response = await current_w3.get().provider.make_request('eth_getBlockByHash', [blockhash, False])
-    raw = hexint(response['result']['timestamp'])
-    # noinspection PyTypeChecker
-    return raw if type(raw) is int else hexint(raw)
-
-
-async def handle_uniswap_swap(swap: EventData):
-    try:
-        sqrt_price = swap['args']['sqrtPriceX96']
-    except KeyError:
-        return
-    addr = swap['address']
-    pool = await Pools.get(addr)
-    if pool is None:
-        return
-    if pool.exchange != Exchange.UniswapV3:
-        log.debug(f'Ignoring {pool.exchange} pool {addr}')
-        return
-    price: dec = await uniswap_price(pool, sqrt_price)
-    timestamp = await get_block_timestamp(swap['blockHash'])
-    dt = datetime.fromtimestamp(timestamp)
-    log.debug(f'pool {addr} {dt} {price}')
-    ohlcs.update_all(addr, dt, price, create=True)
-
-
 async def main():
     # noinspection DuplicatedCode
     logging.basicConfig(level=logging.INFO, stream=sys.stdout)
diff --git a/src/dexorder/bin/main.py b/src/dexorder/bin/main.py
index c77f7c5..81da665 100644
--- a/src/dexorder/bin/main.py
+++ b/src/dexorder/bin/main.py
@@ -12,7 +12,7 @@ from dexorder.contract import get_contract_event
 from dexorder.contract.dexorder import get_factory_contract, get_dexorder_contract
 from dexorder.event_handler import init_order_triggers, init, dump_log, handle_vault_created, handle_order_placed, handle_transfer, handle_uniswap_swap, \
     handle_swap_filled, handle_order_canceled, handle_order_cancel_all, handle_dexorderexecutions, activate_time_triggers, activate_price_triggers, \
-    process_active_tranches, process_execution_requests
+    process_active_tranches, process_execution_requests, check_ohlc_rollover
 from dexorder.memcache.memcache_state import RedisState, publish_all
 from dexorder.memcache import memcache
 from dexorder.runner import BlockStateRunner
@@ -61,12 +61,13 @@ def setup_logevent_triggers(runner):
     runner.add_event_trigger(handle_dexorderexecutions, executions)
 
     # these callbacks run after the ones above on each block, plus these also run every second
-    runner.add_postprocess_trigger(activate_time_triggers)
-    runner.add_postprocess_trigger(activate_price_triggers)
-    runner.add_postprocess_trigger(process_active_tranches)
-    runner.add_postprocess_trigger(process_execution_requests)
-    runner.add_postprocess_trigger(create_transactions)
-    runner.add_postprocess_trigger(send_transactions)
+    runner.postprocess_cbs.append(check_ohlc_rollover)
+    runner.postprocess_cbs.append(activate_time_triggers)
+    runner.postprocess_cbs.append(activate_price_triggers)
+    runner.postprocess_cbs.append(process_active_tranches)
+    runner.postprocess_cbs.append(process_execution_requests)
+    runner.postprocess_cbs.append(create_transactions)
+    runner.postprocess_cbs.append(send_transactions)
 
 
 async def main():
diff --git a/src/dexorder/blockstate/blockdata.py b/src/dexorder/blockstate/blockdata.py
index 94684a1..84b50c3 100644
--- a/src/dexorder/blockstate/blockdata.py
+++ b/src/dexorder/blockstate/blockdata.py
@@ -22,7 +22,7 @@ class DataType(Enum):
     DICT: int = 3
 
 
-class BlockData:
+class BlockData (Generic[T]):
     registry: dict[Any,'BlockData'] = {} # series name and instance
 
     def __init__(self, data_type: DataType, series: Any, *,
@@ -49,12 +49,12 @@ class BlockData:
     def seriesstr(self):
         return self.series2str(self.series)
 
-    def setitem(self, item, value, overwrite=True):
+    def setitem(self, item, value: T, overwrite=True):
         state = current_blockstate.get()
         fork = current_fork.get()
         state.set(fork, self.series, item, value, overwrite)
 
-    def getitem(self, item, default=NARG):
+    def getitem(self, item, default=NARG) -> T:
         state = current_blockstate.get()
         fork = current_fork.get()
         try:
@@ -124,7 +124,7 @@ class BlockData:
         state.delete_series(fork, self.series)
 
 
-class BlockSet(Generic[T], Iterable[T], BlockData):
+class BlockSet(Generic[T], Iterable[T], BlockData[T]):
     def __init__(self, series: Any, **tags):
         super().__init__(DataType.SET, series, **tags)
         self.series = series
@@ -143,7 +143,7 @@ class BlockSet(Generic[T], Iterable[T], BlockData):
         yield from (k for k,v in self.iter_items(self.series))
 
 
-class BlockDict(Generic[K,V], BlockData):
+class BlockDict(Generic[K,V], BlockData[V]):
 
     def __init__(self, series: Any, **tags):
         super().__init__(DataType.DICT, series, **tags)
diff --git a/src/dexorder/data.py b/src/dexorder/data.py
index 345439b..2e11815 100644
--- a/src/dexorder/data.py
+++ b/src/dexorder/data.py
@@ -10,7 +10,7 @@ log = logging.getLogger(__name__)
 #     if pub is True, then event is the current series name, room is the key, and args is [value]
 #     values of DELETE are serialized as nulls
 
-def pub_vault_balances(k, v):
+def pub_vault_balances(_s, k, v):
     chain_id = current_chain.get().chain_id
     try:
         return f'{chain_id}|{vault_owners[k]}', 'vb', (chain_id, k, json.dumps({k2: str(v2) for k2, v2 in v.items()}))
diff --git a/src/dexorder/event_handler.py b/src/dexorder/event_handler.py
index 8440665..54d36f4 100644
--- a/src/dexorder/event_handler.py
+++ b/src/dexorder/event_handler.py
@@ -1,13 +1,15 @@
 import asyncio
 import functools
 import logging
+from datetime import datetime
 from uuid import UUID
 
 from web3.types import EventData
 
-from dexorder import current_pub, db, dec
-from dexorder.base.chain import current_chain, current_clock
+from dexorder import current_pub, db, dec, from_timestamp, minutely
+from dexorder.base.chain import current_chain, current_clock, get_block_timestamp
 from dexorder.base.order import TrancheExecutionRequest, TrancheKey, ExecutionRequest, new_tranche_execution_request, OrderKey
+from dexorder.ohlc import ohlcs, recent_ohlcs
 from dexorder.transaction import submit_transaction_request
 from dexorder.pools import uniswap_price, new_pool_prices, pool_prices, Pools
 from dexorder.contract.dexorder import vault_address, VaultContract
@@ -15,7 +17,7 @@ from dexorder.contract import ERC20
 from dexorder.data import vault_owners, vault_balances
 from dexorder.database.model.block import current_block
 from dexorder.database.model.transaction import TransactionJob
-from dexorder.base.orderlib import SwapOrderState
+from dexorder.base.orderlib import SwapOrderState, Exchange
 from dexorder.order.orderstate import Order
 from dexorder.order.triggers import OrderTriggers, price_triggers, time_triggers, \
     unconstrained_price_triggers, execution_requests, inflight_execution_requests, TrancheStatus, active_tranches, new_price_triggers, activate_order
@@ -151,6 +153,15 @@ async def handle_transfer(transfer: EventData):
     #     log.debug(f'vaults: {list(vaults)}')
 
 
+async def handle_uniswap_swap_old(swap: EventData):
+    try:
+        sqrt_price = swap['args']['sqrtPriceX96']
+    except KeyError:
+        return
+    addr = swap['address']
+    price: dec = await uniswap_price(await Pools.get(addr), sqrt_price)
+    pool_prices[addr] = price
+
 
 async def handle_uniswap_swap(swap: EventData):
     try:
@@ -158,9 +169,18 @@ async def handle_uniswap_swap(swap: EventData):
     except KeyError:
         return
     addr = swap['address']
-    price: dec = await uniswap_price(await Pools.get(addr), sqrt_price)
-    log.debug(f'pool {addr} {price}')
+    pool = await Pools.get(addr)
+    if pool is None:
+        return
+    if pool.exchange != Exchange.UniswapV3:
+        log.debug(f'Ignoring {pool.exchange} pool {addr}')
+        return
+    price: dec = await uniswap_price(pool, sqrt_price)
+    timestamp = await get_block_timestamp(swap['blockHash'])
+    dt = from_timestamp(timestamp)
     pool_prices[addr] = price
+    ohlcs.update_all(addr, dt, price)
+    log.debug(f'pool {addr} {minutely(dt)} {price}')
 
 
 def handle_vault_created(created: EventData):
@@ -186,23 +206,27 @@ def handle_vault_created(created: EventData):
 
 
 async def activate_time_triggers():
-    now = current_clock.get().timestamp()
+    now = current_clock.get().timestamp
     # log.debug(f'activating time triggers at {now}')
     # time triggers
     for tt in tuple(time_triggers):
+        # noinspection PyTypeChecker
         await maywait(tt(now))
 
+
 async def activate_price_triggers():
     # log.debug(f'activating price triggers')
     pools_triggered = set()
     for pool, price in new_pool_prices.items():
         pools_triggered.add(pool)
         for pt in tuple(price_triggers[pool]):
+            # noinspection PyTypeChecker
             await maywait(pt(price))
     for pool, triggers in new_price_triggers.items():
         if pool not in pools_triggered:
             price = pool_prices[pool]
             for pt in triggers:
+                # noinspection PyTypeChecker
                 await maywait(pt(price))
     for t in tuple(unconstrained_price_triggers):
         # noinspection PyTypeChecker
@@ -296,3 +320,16 @@ def finish_execution_request(req: TrancheExecutionRequest, error: str):
     else:
         if er.height < current_block.get().height:
             del execution_requests[tk]
+
+
+last_ohlc_rollover = 0
+def check_ohlc_rollover():
+    global last_ohlc_rollover
+    time = current_block.get().timestamp
+    dt = from_timestamp(time)
+    diff = time - last_ohlc_rollover
+    if diff >= 60 or dt.minute != from_timestamp(last_ohlc_rollover).minute:
+        for (symbol, period) in recent_ohlcs.keys():
+            ohlcs.update(symbol, period, dt)
+        last_ohlc_rollover = time
+
diff --git a/src/dexorder/memcache/memcache_state.py b/src/dexorder/memcache/memcache_state.py
index 54cf6d6..20d644b 100644
--- a/src/dexorder/memcache/memcache_state.py
+++ b/src/dexorder/memcache/memcache_state.py
@@ -70,7 +70,7 @@ class RedisState (SeriesCollection):
                 value = d.value2str(diff.value)
                 pub_era = series, key, [value]
             elif callable(pub_era):
-                pub_era = await maywait(pub_era(diff.key, diff.value))
+                pub_era = await maywait(pub_era(diff.series, diff.key, diff.value))
             if pub_era is not None:
                 e, r, a = pub_era
                 # noinspection PyTypeChecker
diff --git a/src/dexorder/base/ohlc.py b/src/dexorder/ohlc.py
similarity index 73%
rename from src/dexorder/base/ohlc.py
rename to src/dexorder/ohlc.py
index 9bd1777..fc32d89 100644
--- a/src/dexorder/base/ohlc.py
+++ b/src/dexorder/ohlc.py
@@ -2,12 +2,13 @@ import json
 import logging
 import os
 from dataclasses import dataclass
-from datetime import datetime, timedelta
-from typing import Optional
+from datetime import datetime, timedelta, timezone
+from typing import Optional, NamedTuple
 
 from cachetools import LFUCache
 
-from dexorder import dec, config
+from dexorder import dec, config, from_isotime, minutely
+from dexorder.base.chain import current_chain
 from dexorder.blockstate import BlockDict
 
 log = logging.getLogger(__name__)
@@ -18,7 +19,7 @@ OHLC_PERIODS = [
     timedelta(days=1), timedelta(days=2), timedelta(days=3), timedelta(days=7)
 ]
 
-OHLC_DATE_ROOT = datetime(2009, 1, 4)  # Sunday before Bitcoin Genesis
+OHLC_DATE_ROOT = datetime(2009, 1, 4, tzinfo=timezone.utc)  # Sunday before Bitcoin Genesis
 
 # OHLC's are stored as [time, open, high, low, close] string values.  If there was no data during the interval,
 # then open, high, and low are None but the close value is carried over from the previous interval.
@@ -29,7 +30,7 @@ def opt_dec(v):
     return None if v is None else dec(v)
 
 def dt(v):
-    return v if isinstance(v, datetime) else datetime.fromisoformat(v)
+    return v if isinstance(v, datetime) else from_isotime(v)
 
 @dataclass
 class NativeOHLC:
@@ -81,6 +82,7 @@ def update_ohlc(prev: OHLC, period: timedelta, time: datetime, price: Optional[d
     returns an ordered list of OHLC's that have been created/modified by the new time/price
     if price is None, then bars are advanced based on the time but no new price is added to the series.
     """
+    log.debug(f'\tupdating {prev} with {minutely(time)} {price}')
     cur = NativeOHLC.from_ohlc(prev)
     assert time >= cur.start
     result = []
@@ -91,6 +93,7 @@ def update_ohlc(prev: OHLC, period: timedelta, time: datetime, price: Optional[d
             break
         result.append(cur.ohlc)
         cur = NativeOHLC(end, None, None, None, cur.close)
+    log.debug(f'\tresult after finalization: {result}')
     # if we are setting a price, update the current bar
     if price is not None:
         if cur.open is None:
@@ -102,12 +105,13 @@ def update_ohlc(prev: OHLC, period: timedelta, time: datetime, price: Optional[d
             cur.low = min(cur.low, price)
         cur.close = price
     result.append(cur.ohlc)
+    log.debug(f'\tappended current bar: {cur.ohlc}')
+    log.debug(f'\tupdate result: {result}')
     return result
 
-
-# The most recent OHLC's are stored as block data.  We store a list of at least the two latest bars, which provides clients with
-# the latest finalized bar as well as the current open bar.
-recent_ohlcs = BlockDict('ohlc', db=True, redis=True)
+class OHLCKey (NamedTuple):
+    symbol: str
+    period: timedelta
 
 
 class OHLCRepository:
@@ -128,26 +132,33 @@ class OHLCRepository:
                 if (symbol, period) not in recent_ohlcs:
                     recent_ohlcs[(symbol, period)] = []
 
-    def update_all(self, symbol: str, time: datetime, price: dec, *, create: bool = False):
+    def update_all(self, symbol: str, time: datetime, price: dec, *, create: bool = True):
         for period in OHLC_PERIODS:
             self.update(symbol, period, time, price, create=create)
 
-    def update(self, symbol: str, period: timedelta, time: datetime, price: Optional[dec], *, create: bool = False) -> Optional[list[OHLC]]:
+    def update(self, symbol: str, period: timedelta, time: datetime, price: Optional[dec] = None, *, create: bool = True) -> Optional[list[OHLC]]:
         """
         if price is None, then bars are advanced based on the time but no new price is added to the series.
         """
+        logname = f'{symbol} {ohlc_name(period)}'
+        log.debug(f'Updating OHLC {logname} {minutely(time)} {price}')
         key = (symbol, period)
         bars: Optional[list[OHLC]] = recent_ohlcs.get(key)
-        if bars is None:
-            if create is False:
+        if not bars:
+            if create is False or price is None:
                 return  # do not track symbols which have not been explicity set up
-            bars = [OHLC((ohlc_start_time(time, period).isoformat(timespec='minutes'), price, price, price, price))]
-        updated = update_ohlc(bars[-1], period, time, price)
-        if len(updated) == 1:
-            updated = [*bars[:-1], updated[0]]  # return the previous finalized bars along with the updated current bar
+            p = str(price)
+            updated = [OHLC((minutely(ohlc_start_time(time, period)), p, p, p, p))]
+            log.debug(f'\tcreated new bars {updated}')
+        else:
+            updated = update_ohlc(bars[-1], period, time, price)
+            if len(updated) == 1:
+                updated = [bars[-1], updated[0]]  # return the previous finalized bar along with the updated current bar
+        log.debug(f'\tnew recents: {updated}')
         recent_ohlcs.setitem(key, updated)
         if len(updated) > 1:
-            self.save_all(symbol, period, updated[:-1])
+            log.debug(f'\tsaving finalized bars: {updated[:-1]}')
+            self.save_all(symbol, period, updated[:-1])  # save any finalized bars to storage
         return updated
 
     def save_all(self, symbol: str, period: timedelta, ohlc_list: list[OHLC]) -> None:
@@ -160,13 +171,14 @@ class OHLCRepository:
         if not chunk:
             chunk = [ohlc]
         else:
-            start = datetime.fromisoformat(chunk[0][0])
+            start = from_isotime(chunk[0][0])
             index = (time - start) // period
+            assert index <= len(chunk)
             if index == len(chunk):
-                assert datetime.fromisoformat(chunk[-1][0]) + period == time
+                assert from_isotime(chunk[-1][0]) + period == time
                 chunk.append(ohlc)
             else:
-                assert datetime.fromisoformat(chunk[index][0]) == time
+                assert from_isotime(chunk[index][0]) == time
                 chunk[index] = ohlc
         self.save_chunk(symbol, period, chunk)
 
@@ -191,7 +203,7 @@ class OHLCRepository:
     def save_chunk(self, symbol: str, period: timedelta, chunk: list[OHLC]):
         if not chunk:
             return
-        path = self.chunk_path(symbol, period, datetime.fromisoformat(chunk[0][0]))
+        path = self.chunk_path(symbol, period, from_isotime(chunk[0][0]))
         try:
             with open(path, 'w') as file:
                 json.dump(chunk, file)
@@ -212,4 +224,27 @@ class OHLCRepository:
         )
 
 
+def pub_ohlc(_series:str, key: OHLCKey, bars: list[OHLC]):
+    pool_addr, period = key
+    chain_id = current_chain.get().chain_id
+    return (
+        f'{chain_id}|{pool_addr}|{ohlc_name(period)}',  # channel name is like 0x...|1m
+        'ohlcs',
+        (chain_id, pool_addr, bars)
+    )
+
+def ohlc_key_to_str(k):
+    return f'{k[0]}|{ohlc_name(k[1])}'
+
+def ohlc_str_to_key(s):
+    pool, period_name = s.split('|')
+    return pool, period_from_name(period_name)
+
+# The most recent OHLC's are stored as block data.  We store a list of at least the two latest bars, which provides clients with
+# the latest finalized bar as well as the current open bar.
+recent_ohlcs: BlockDict[OHLCKey, list[OHLC]] = BlockDict('ohlc', db=True, redis=True, pub=pub_ohlc,
+                                                         key2str=ohlc_key_to_str, str2key=ohlc_str_to_key,
+                                                         series2key=lambda x:x, series2str=lambda x:x)
+
+
 ohlcs = OHLCRepository()
diff --git a/src/dexorder/order/orderstate.py b/src/dexorder/order/orderstate.py
index d23dfc4..122dc22 100644
--- a/src/dexorder/order/orderstate.py
+++ b/src/dexorder/order/orderstate.py
@@ -182,7 +182,7 @@ class Order:
         Order.order_statuses.unload(self.key) # but then unload from memory after root promotion
 
     @staticmethod
-    async def pub_order_status(k, v):
+    def pub_order_status(_s, k, v):
         # publish status updates (on placing and completion) to web clients
         try:
             chain_id = current_chain.get().chain_id
@@ -196,7 +196,7 @@ class Order:
             log.error(f'could not dump {v}')
 
     @staticmethod
-    async def pub_order_fills(k, v):
+    def pub_order_fills(_s, k, v):
         # publish status updates (on placing and completion) to web clients
         if v is DELETE:
             return None
diff --git a/src/dexorder/order/triggers.py b/src/dexorder/order/triggers.py
index 6135d1f..5a7c285 100644
--- a/src/dexorder/order/triggers.py
+++ b/src/dexorder/order/triggers.py
@@ -54,7 +54,7 @@ async def line_passes(lc: tuple[float,float], is_min: bool, price: dec) -> bool:
     b, m = lc
     if b == 0 and m == 0:
         return True
-    limit = m * current_clock.get().timestamp() + b
+    limit = m * current_clock.get().timestamp + b
     log.debug(f'line passes {limit} {"<" if is_min else ">"} {price}')
     # todo ratios
     # prices AT the limit get zero volume, so we only trigger on >, not >=
@@ -98,7 +98,7 @@ class TrancheTrigger:
         if tranche_remaining == 0 or tranche_remaining < self.order.min_fill_amount: # min_fill_amount could be 0 (disabled) so we also check for the 0 case separately
             self._status = TrancheStatus.Filled
             return
-        timestamp = current_clock.get().timestamp()
+        timestamp = current_clock.get().timestamp
         self._status = \
             TrancheStatus.Pricing if self.time_constraint is None else \
             TrancheStatus.Early if timestamp < self.time_constraint[0] else \
diff --git a/src/dexorder/pools.py b/src/dexorder/pools.py
index b8668e5..81ec780 100644
--- a/src/dexorder/pools.py
+++ b/src/dexorder/pools.py
@@ -52,7 +52,7 @@ class PoolPrices (BlockDict[str, dec]):
         new_pool_prices[item] = value
 
 
-def pub_pool_price(k,v):
+def pub_pool_price(_s,k,v):
     chain_id = current_chain.get().chain_id
     return f'{chain_id}|{k}', 'p', (chain_id, k, str(v))
 
diff --git a/src/dexorder/runner.py b/src/dexorder/runner.py
index 7ba8463..2a0a01b 100644
--- a/src/dexorder/runner.py
+++ b/src/dexorder/runner.py
@@ -93,10 +93,6 @@ class BlockStateRunner:
             log_filter = {'topics': [topic(event.abi)]}
         self.events.append((callback, event, log_filter))
 
-    def add_postprocess_trigger(self, callback: Maywaitable[[], None]):
-        # noinspection PyTypeChecker
-        self.postprocess_cbs.append(callback)
-
     async def run(self):
         # this run() process discovers new heads and puts them on a queue for the worker to process. the discovery is ether websockets or polling
         if self.state:
diff --git a/src/dexorder/util/sql.py b/src/dexorder/util/sql.py
index 62a6581..124ef70 100644
--- a/src/dexorder/util/sql.py
+++ b/src/dexorder/util/sql.py
@@ -1,14 +1,16 @@
 from datetime import datetime, timedelta
 from typing import Union
 
+from dexorder import now
+
 
 def where_time_range(sql, time_column, start: Union[datetime,timedelta,None] = None, end: Union[datetime,timedelta,None] = None):
     if start is not None:
         if isinstance(start, timedelta):
-            start = datetime.now() - abs(start)
+            start = now() - abs(start)
         sql = sql.where(time_column >= start)
     if end is not None:
         if isinstance(end, timedelta):
-            end = datetime.now() - abs(end)
+            end = now() - abs(end)
         sql = sql.where(time_column < end)
     return sql