This major upgrade includes changes to indexes, API methods and services. Please review below details before upgrading.
### Indexes
Indexes include *more information* and are now also *faster*. Because of this a **reindex will be necessary** when upgrading as the address and database indexes are now a part of bitcoind with three new `bitcoin.conf` options:
- The `datadir` option is now a part of `bitcoind` spawn configuration, and there is a new option to connect to multiple bitcoind processes (Please see [Bitcoin Service Docs](services/bitcoind.md) for more details). The services `db` and `address` are now a part of the `bitcoind` service. Here is how to update `bitcore-node.json` configuration options:
It will also be necessary to update `bitcoin.conf` settings, to include these fields:
```
server=1
whitelist=127.0.0.1
txindex=1
addressindex=1
timestampindex=1
spentindex=1
zmqpubrawtx=tcp://127.0.0.1:<port>
zmqpubhashblock=tcp://127.0.0.1:<port>
rpcallowip=127.0.0.1
rpcuser=<user>
rpcpassword=<password>
```
**Important**: Once changes have been made you'll also need to add the `reindex=1` option **only for the first startup** to regenerate the indexes. Once this is complete you should be able to remove the `bitcore-node.db` directory with the old indexes.
- Many API methods that were a part of the `db` and `address` services are now a part of the `bitcoind` service. Please see [Bitcoin Service Docs](services/bitcoind.md) for more details.
- The `db` and `address` services are deprecated, most of the functionality still exists. Any services that were extending indexes with the `db` service, will need to manage chain state itself, or build the indexes within `bitcoind`.