dpeq is a library that implements a subset of PostgreSQL wire protocol and focuses on extended query (EQ) protocol subset. dpeq defines classes to hold the required state and utility functions, that send and receive protocol messages in sensible manner.
dpeq is aimed on library developers that write database middleware for Postgres or CockroachDB.
Here is a list of good links to get yourself familiar with EQ protocol, wich may
help you to understand the nature of the messages being passed:
https://www.pgcon.org/2014/schedule/attachments/330_postgres-for-the-wire.pdf
https://www.postgresql.org/docs/9.5/static/protocol.html
https://www.postgresql.org/docs/9.5/static/protocol-flow.html
https://www.postgresql.org/docs/9.5/static/protocol-message-formats.html
Many thanks to authors of https://github.com/pszturmaj/ddb and https://github.com/teamhackback/hb-ddb, wich gave this library inspiration.
To see examples, see ./tests/source/main.d