bugfix

src/dexorder/blocks.py

@@ -43,7 +43,7 @@ async def _fetch(fetch: FetchLock, chain_id: int, block_id: Union[int,bytes]) ->
         if type(block_id) is int:
             # by-number could return multiple results
             # noinspection PyTypeChecker
-            blocks: list[DbBlock] = db.session.execute(select(DbBlock).where(
+            blocks: list[DbBlock] = db.session.scalars(select(DbBlock).where(
                 DbBlock.chain == chain,
                 DbBlock.height == block_id
             )).all()
@@ -53,7 +53,11 @@ async def _fetch(fetch: FetchLock, chain_id: int, block_id: Union[int,bytes]) ->
         else:
             found = db.session.get(DbBlock, dict(chain=chain, hash=block_id))  # by-hash is the primary key
         if found:
-            return Block(chain_id, found.data)
+            log.debug(f'found block: {found}')
+            try:
+                return Block(chain_id, found.data)
+            except AttributeError:
+                log.exception(f'found was {found}')
 
     # fetch from RPC
     try: