# Immutable x Reservoir
* Assumption: Relayer used to `UPDATE` the `orders` table which is created by the indexer
* Relayer only adds to the `hash, target, maker, created_at, data, source` column.
* *Do we need that data?*
* *What is in the data field?*
* *Fields like currency, price and value don't seem to get populated?*
* *No hash column in indexer's order table.*
* Immutable orderbook has an API as well, which gives a lot of data and pretty similar endpoints as seaport. [API Reference | Immutable zkEVM Documentation](https://docs.immutable.com/zkevm/reference/#/operations/ListTrades)