diff --git a/planetmint/backend/localmongodb/query.py b/planetmint/backend/localmongodb/query.py
index db98230..bdf5152 100644
--- a/planetmint/backend/localmongodb/query.py
+++ b/planetmint/backend/localmongodb/query.py
@@ -41,10 +41,10 @@ def get_transactions(conn, transaction_ids):
 
 
 @register_query(LocalMongoDBConnection)
-def store_metadatas(conn, metadata):
-    return conn.run(
-        conn.collection('metadata')
-        .insert_many(metadata, ordered=False))
+def store_metadatas(metadata, connection):
+    space = connection.space("meta_data")
+    for meta in metadata:
+        space.insert((meta["id"], meta))
 
 
 @register_query(LocalMongoDBConnection)
@@ -56,89 +56,122 @@ def get_metadata(conn, transaction_ids):
 
 
 @register_query(LocalMongoDBConnection)
-def store_asset(conn, asset):
-    try:
-        return conn.run(
-            conn.collection('assets')
-            .insert_one(asset))
-    except DuplicateKeyError:
-        pass
+def store_asset(asset, connection):
+    space = connection.space("assets")
+    unique = token_hex(8)
+    space.insert((asset["id"], unique, asset["data"]))
 
 
 @register_query(LocalMongoDBConnection)
-def store_assets(conn, assets):
-    return conn.run(
-        conn.collection('assets')
-        .insert_many(assets, ordered=False))
+def store_assets(assets, connection):
+    space = connection.space("assets")
+    for asset in assets:
+        unique = token_hex(8)
+        space.insert((asset["id"], unique, asset["data"]))
 
 
 @register_query(LocalMongoDBConnection)
-def get_asset(conn, asset_id):
-    try:
-        return conn.run(
-            conn.collection('assets')
-            .find_one({'id': asset_id}, {'_id': 0, 'id': 0}))
-    except IndexError:
-        pass
+def get_asset(asset_id: str, space):
+    _data = space.select(asset_id, index="assetid_search")
+    _data = _data.data[0]
+    return {"data": _data[1]}
 
 
 @register_query(LocalMongoDBConnection)
-def get_assets(conn, asset_ids):
-    return conn.run(
-        conn.collection('assets')
-        .find({'id': {'$in': asset_ids}},
-              projection={'_id': False}))
+def get_assets(assets_ids: list, space):
+    _returned_data = []
+    for _id in assets_ids:
+        asset = space.select(_id, index="assetid_search")
+        asset = asset.data[0]
+        _returned_data.append({"id": asset[0], "data": asset[1]})
+    return _returned_data
 
 
 @register_query(LocalMongoDBConnection)
-def get_spent(conn, transaction_id, output):
-    query = {'inputs':
-             {'$elemMatch':
-              {'$and': [{'fulfills.transaction_id': transaction_id},
-                        {'fulfills.output_index': output}]}}}
-
-    return conn.run(
-        conn.collection('transactions')
-            .find(query, {'_id': 0}))
+def get_spent(fullfil_transaction_id: str, fullfil_output_index: str, connection):
+    _transaction_object = formats.transactions.copy()
+    _transaction_object["inputs"] = []
+    _transaction_object["outputs"] = []
+    space = connection.space("inputs")
+    _inputs = space.select([fullfil_transaction_id, fullfil_output_index], index="spent_search")
+    _inputs = _inputs.data
+    _transaction_object["id"] = _inputs[0][0]
+    _transaction_object["inputs"] = [
+        {
+            "owners_before": _in[2],
+            "fulfills": {"transaction_id": _in[3], "output_index": _in[4]},
+            "fulfillment": _in[1]
+        } for _in in _inputs
+    ]
+    space = connection.space("outputs")
+    _outputs = space.select(_transaction_object["id"], index="id_search")
+    _outputs = _outputs.data
+    _transaction_object["outputs"] = [
+        {
+            "public_keys": _out[5],
+            "amount": _out[1],
+            "condition": {"details": {"type": _out[3], "public_key": _out[4]}, "uri": _out[2]}
+        } for _out in _outputs
+    ]
+    return _transaction_object
 
 
 @register_query(LocalMongoDBConnection)
-def get_latest_block(conn):
-    return conn.run(
-        conn.collection('blocks')
-        .find_one(projection={'_id': False},
-                  sort=[('height', DESCENDING)]))
+def latest_block(connection):  # TODO Here is used DESCENDING OPERATOR
+    space = connection.space("blocks")
+    _all_blocks = space.select()
+    _all_blocks = _all_blocks.data
+    _block = sorted(_all_blocks, key=itemgetter(1))[0]
+    space = connection.space("blocks_tx")
+    _txids = space.select(_block[2], index="block_search")
+    _txids = _txids.data
+    return {"app_hash": _block[1], "height": _block[1], "transactions": [tx[0] for tx in _txids]}
 
 
 @register_query(LocalMongoDBConnection)
-def store_block(conn, block):
-    try:
-        return conn.run(
-            conn.collection('blocks')
-            .insert_one(block))
-    except DuplicateKeyError:
-        pass
+def store_block(block, connection):
+    space = connection.space("blocks")
+    block_unique_id = token_hex(8)
+    space.insert((block["app_hash"],
+                  block["height"],
+                  block_unique_id))
+    space = connection.space("blocks_tx")
+    for txid in block["transactions"]:
+        space.insert((txid, block_unique_id))
 
 
 @register_query(LocalMongoDBConnection)
-def get_txids_filtered(conn, asset_id, operation=None, last_tx=None):
+def get_txids_filtered(connection, asset_id, operation=None, last_tx=None):  # TODO here is used 'OR' operator
+    _transaction_object = formats.transactions.copy()
+    _transaction_object["inputs"] = []
+    _transaction_object["outputs"] = []
 
-    match = {
-        Transaction.CREATE: {'operation': 'CREATE', 'id': asset_id},
-        Transaction.TRANSFER: {'operation': 'TRANSFER', 'asset.id': asset_id},
-        None: {'$or': [{'asset.id': asset_id}, {'id': asset_id}]},
+    actions = {
+        "CREATE": {"sets": ["CREATE", asset_id], "index": "transaction_search"},
+        # 1 - operation, 2 - id (only in transactions) +
+        "TRANSFER": {"sets": ["TRANSFER", asset_id], "index": "asset_search"},
+        # 1 - operation, 2 - asset.id (linked mode) + OPERATOR OR
+        None: {"sets": [asset_id, asset_id], "index": "both_search"}
     }[operation]
-
-    cursor = conn.run(conn.collection('transactions').find(match))
+    space = connection.space("transactions")
+    if actions["sets"][0] == "CREATE":
+        _transactions = space.select([operation, asset_id], index=actions["index"])
+        _transactions = _transactions.data
+    elif actions["sets"][0] == "TRANSFER":
+        _transactions = space.select([operation, asset_id], index=actions["index"])
+        _transactions = _transactions.data
+    else:
+        _transactions = space.select([asset_id, asset_id], index=actions["index"])
+        _transactions = _transactions.data
 
     if last_tx:
-        cursor = cursor.sort([('$natural', DESCENDING)]).limit(1)
+        _transactions = [_transactions[0]]
 
-    return (elem['id'] for elem in cursor)
+    return tuple([elem[0] for elem in _transactions])
 
 
 @register_query(LocalMongoDBConnection)
-def text_search(conn, search, *, language='english', case_sensitive=False,
+def text_search(conn, search, *, language='english', case_sensitive=False,  # TODO review text search in tarantool (maybe, remove)
                 diacritic_sensitive=False, text_score=False, limit=0, table='assets'):
     cursor = conn.run(
         conn.collection(table)
@@ -163,46 +196,100 @@ def _remove_text_score(asset):
 
 
 @register_query(LocalMongoDBConnection)
-def get_owned_ids(conn, owner):
-    cursor = conn.run(
-        conn.collection('transactions').aggregate([
-            {'$match': {'outputs.public_keys': owner}},
-            {'$project': {'_id': False}}
-        ]))
-    return cursor
+def get_owned_ids(connection, owner):  # TODO implement 'group_transactions_by_id'
+    space = connection.space("keys")
+    _keys = space.select(owner, index="keys_search")
+
+    _outputid = _keys[0][1]
+    _transactionid = _keys[0][0]
+
+    _transaction_object = formats.transactions.copy()
+    _transaction_object["inputs"] = []
+    _transaction_object["outputs"] = []
+
+    _transactions = []
+
+    _all_keys = space.select(_outputid, index="id_search")
+    _all_keys = _all_keys.data
+
+    space = connection.space("transactions")
+    _all_transactions = space.select(_transactionid, index="id_search")
+    _all_transactions = _all_transactions.data
+
+    space = connection.space("inputs")
+    _all_inputs = space.select(_transactionid, index="id_search")
+    _all_inputs = _all_inputs.data
+
+    space = connection.space("outputs")
+    _all_outputs = space.select(_transactionid, index="id_search")
+    _all_outputs = _all_outputs.data
+
+    for tsobject in _all_transactions:
+        local_ts = _transaction_object.copy()
+        local_ts["id"] = tsobject[0]
+        local_ts["operation"] = tsobject[1]
+        local_ts["version"] = tsobject[2]
+
+        for _in in _all_inputs:
+            if _in[0] == tsobject[0]:
+                local_ts["inputs"].append(
+                    {
+                        "owners_before": _in[2],
+                        "fulffils": {"transaction_id": _in[3], "output_index": _in[4]},
+                        "fulffilment": _in[1]
+                    }
+                )
+        for _out in _all_outputs:
+            if _out[0] == tsobject[0]:
+                local_ts["outputs"].append(
+                    {
+                        "public_keys": [_key[2] for _key in _all_keys if _out[5] == _key[1]],
+                        "condition": {"details": {"type": _out[3], "public_key": _out[4]}, "uri": _out[2]},
+                        "amount": _out[1]
+                    }
+                )
+        _transactions.append(local_ts)
+
+    return _transactions
 
 
 @register_query(LocalMongoDBConnection)
-def get_spending_transactions(conn, inputs):
+def get_spending_transactions(inputs, connection):
     transaction_ids = [i['transaction_id'] for i in inputs]
     output_indexes = [i['output_index'] for i in inputs]
-    query = {'inputs':
-             {'$elemMatch':
-              {'$and':
-               [
-                   {'fulfills.transaction_id': {'$in': transaction_ids}},
-                   {'fulfills.output_index': {'$in': output_indexes}}
-               ]}}}
 
-    cursor = conn.run(
-        conn.collection('transactions').find(query, {'_id': False}))
-    return cursor
+    _transactions = []
+
+    for i in range(0, len(transaction_ids)):
+        ts_id = transaction_ids[i]
+        ot_id = output_indexes[i]
+
+        _trans_object = get_spent(fullfil_transaction_id=ts_id, fullfil_output_index=ot_id, connection=connection)
+        _transactions.append(_trans_object)
+
+    return _transactions
 
 
 @register_query(LocalMongoDBConnection)
-def get_block(conn, block_id):
-    return conn.run(
-        conn.collection('blocks')
-        .find_one({'height': block_id},
-                  projection={'_id': False}))
+def get_block(block_id, connection):
+    space = connection.space("blocks")
+    _block = space.select(block_id, index="block_search", limit=1)
+    _block = _block.data[0]
+    _txblock = space.select(_block[2], index="block_search")
+    _txblock = _txblock.data
+    return {"app_hash": _block[0], "height": _block[1], "transactions": [_tx[0] for _tx in _txblock]}
 
 
 @register_query(LocalMongoDBConnection)
-def get_block_with_transaction(conn, txid):
-    return conn.run(
-        conn.collection('blocks')
-        .find({'transactions': txid},
-              projection={'_id': False, 'height': True}))
+def get_block_with_transaction(txid, connection):
+    space = connection.space("blocks_tx")
+    _all_blocks_tx = space.select(txid, index="id_search")
+    _all_blocks_tx = _all_blocks_tx.data
+    space = connection.space("blocks")
+
+    _block = space.select(_all_blocks_tx[0][1], index="block_id_search")
+    _block = _block.data[0]
+    return {"app_hash": _block[0], "height": _block[1], "transactions": [_tx[0] for _tx in _all_blocks_tx]}
 
 
 @register_query(LocalMongoDBConnection)
@@ -251,11 +338,15 @@ def get_unspent_outputs(conn, *, query=None):
 
 
 @register_query(LocalMongoDBConnection)
-def store_pre_commit_state(conn, state):
-    return conn.run(
-        conn.collection('pre_commit')
-        .replace_one({}, state, upsert=True)
-    )
+def store_pre_commit_state(state, connection):
+    space = connection.space("pre_commits")
+    _precommit = space.select(state["height"], index="height_search", limit=1)
+    unique_id = token_hex(8) if (len(_precommit.data) == 0) else _precommit.data[0][0]
+    space.upsert((unique_id, state["height"], state["transactions"]),
+                 op_list=[('=', 0, unique_id),
+                          ('=', 1, state["height"]),
+                          ('=', 2, state["transactions"])],
+                 limit=1)
 
 
 @register_query(LocalMongoDBConnection)
@@ -264,15 +355,15 @@ def get_pre_commit_state(conn):
 
 
 @register_query(LocalMongoDBConnection)
-def store_validator_set(conn, validators_update):
-    height = validators_update['height']
-    return conn.run(
-        conn.collection('validators').replace_one(
-            {'height': height},
-            validators_update,
-            upsert=True
-        )
-    )
+def store_validator_set(validators_update, connection):
+    space = connection.space("validators")
+    _validator = space.select(validators_update["height"], index="height_search", limit=1)
+    unique_id = token_hex(8) if (len(_validator.data) == 0) else _validator.data[0][0]
+    space.upsert((unique_id, validators_update["height"], validators_update["validators"]),
+                 op_list=[('=', 0, unique_id),
+                          ('=', 1, validators_update["height"]),
+                          ('=', 2, validators_update["validators"])],
+                 limit=1)
 
 
 @register_query(LocalMongoDBConnection)
@@ -283,24 +374,22 @@ def delete_validator_set(conn, height):
 
 
 @register_query(LocalMongoDBConnection)
-def store_election(conn, election_id, height, is_concluded):
-    return conn.run(
-        conn.collection('elections').replace_one(
-            {'election_id': election_id,
-             'height': height},
-            {'election_id': election_id,
-             'height': height,
-             'is_concluded': is_concluded},
-            upsert=True,
-        )
-    )
+def store_election(election_id, height, is_concluded, connection):
+    space = connection.space("elections")
+    space.upsert((election_id, height, is_concluded),
+                 op_list=[('=', 0, election_id),
+                          ('=', 1, height),
+                          ('=', 2, is_concluded)],
+                 limit=1)
 
 
 @register_query(LocalMongoDBConnection)
-def store_elections(conn, elections):
-    return conn.run(
-        conn.collection('elections').insert_many(elections)
-    )
+def store_elections(elections, connection):
+    space = connection.space("elections")
+    for election in elections:
+        _election = space.insert((election["election_id"],
+                                  election["height"],
+                                  election["is_concluded"]))
 
 
 @register_query(LocalMongoDBConnection)
@@ -311,55 +400,46 @@ def delete_elections(conn, height):
 
 
 @register_query(LocalMongoDBConnection)
-def get_validator_set(conn, height=None):
-    query = {}
+def get_validator_set(connection, height=None):
+    space = connection.space("validators")
+    _validators = space.select()
+    _validators = _validators.data
     if height is not None:
-        query = {'height': {'$lte': height}}
+        _validators = [validator for validator in _validators if validator[1] <= height]
+        return next(iter(sorted(_validators, key=itemgetter(1))), None)
 
-    cursor = conn.run(
-        conn.collection('validators')
-        .find(query, projection={'_id': False})
-        .sort([('height', DESCENDING)])
-        .limit(1)
-    )
-
-    return next(cursor, None)
+    return next(iter(sorted(_validators, key=itemgetter(1))), None)
 
 
 @register_query(LocalMongoDBConnection)
-def get_election(conn, election_id):
-    query = {'election_id': election_id}
-
-    return conn.run(
-        conn.collection('elections')
-        .find_one(query, projection={'_id': False},
-                  sort=[('height', DESCENDING)])
-    )
+def get_election(election_id, connection):
+    space = connection.space("elections")
+    _elections = space.select(election_id, index="id_search")
+    _elections = _elections.data
+    _election = sorted(_elections, key=itemgetter(0))[0]
+    return {"election_id": _election[0], "height": _election[1], "is_concluded": _election[2]}
 
 
 @register_query(LocalMongoDBConnection)
-def get_asset_tokens_for_public_key(conn, asset_id, public_key):
-    query = {'outputs.public_keys': [public_key],
-             'asset.id': asset_id}
-
-    cursor = conn.run(
-        conn.collection('transactions').aggregate([
-            {'$match': query},
-            {'$project': {'_id': False}}
-        ]))
-    return cursor
+def get_asset_tokens_for_public_key(connection, asset_id, public_key):
+    space = connection.space("keys")
+    _keys = space.select([public_key], index="keys_search")
+    space = connection.space("transactions")
+    _transactions = space.select([asset_id], index="only_asset_search")
+    _transactions = _transactions.data
+    _keys = _keys.data
+    _grouped_transactions = group_transaction_by_ids(connection=connection, txids=[_tx[0] for _tx in _transactions])
+    return _grouped_transactions
 
 
 @register_query(LocalMongoDBConnection)
-def store_abci_chain(conn, height, chain_id, is_synced=True):
-    return conn.run(
-        conn.collection('abci_chains').replace_one(
-            {'height': height},
-            {'height': height, 'chain_id': chain_id,
-             'is_synced': is_synced},
-            upsert=True,
-        )
-    )
+def store_abci_chain(height, chain_id, connection, is_synced=True):
+    space = connection.space("abci_chains")
+    space.upsert((height, chain_id, is_synced),
+                 op_list=[('=', 0, height),
+                          ('=', 1, chain_id),
+                          ('=', 2, is_synced)],
+                 limit=1)
 
 
 @register_query(LocalMongoDBConnection)
@@ -370,8 +450,8 @@ def delete_abci_chain(conn, height):
 
 
 @register_query(LocalMongoDBConnection)
-def get_latest_abci_chain(conn):
-    return conn.run(
-        conn.collection('abci_chains')
-            .find_one(projection={'_id': False}, sort=[('height', DESCENDING)])
-    )
+def get_latest_abci_chain(connection):
+    space = connection.space("abci_chains")
+    _all_chains = space.select()
+    _chain = sorted(_all_chains.data, key=itemgetter(0))[0]
+    return {"height": _chain[0], "is_synced": _chain[1], "chain_id": _chain[2]}