UTXO Index
UTXO Index is an auxiliary database that enables the Kaspa node to perform additional tracking of transaction addresses. This allows you to setup notifications for when a new transaction matching your addresses has been detected.
If UTXO Index is not enabled, RPC calls requesting UTXO By Addresses information will result in an error.
To enable UTXO Index run the node with the --utxoindex
command-line argument.