Currently, SQLite is used as the sole SQL backend for the tower. However, the tower should allow having different SQL backends pickable during compilation.

Generalize the DBM so other backends can be added.

Further info: https://www.summerofbitcoin.org/project-ideas-details?recordId=recYp3MeVaI79Jocg

DISCLAIMER

This is a Summer Of Bitcoin (SOB) project. If you're considering tackling this but you are not part of SOB, please leave it until SOB is over. After that, feel free to jump in.