Database operations for Cardano SL.
A Cardano node has a database that is used to store:
- The blocks that make up the blockchain and a block index to make queries on the blocks easier and more efficient.
- UTXOs (unspent transaction outputs).
- LRC (leaders and richmen computation) data required for Proof-of-Stake.
- Other miscellaneous data.
A cardano node stores its data in a RocksDB database. Since RocksDB is written in C++, it is accessed from Haskell via the rocksdb-haskell-ng library.
In addition, this library provides a pure database interface built on top
of Data.Map that mirrors the RocksDB data base so that one can be tested
against the other.