# Functions
NewPostgresDriverFromConnectionString returns PostgresDriver instance from connection string.
NewPostgresDriverFromSQLDBInstance returns PostgresDriver instance from sdl.DB instance mostly used for mocking tests.
# Variables
ErrByteTypeAssertionFailed error when []byte type assertion fails.
ErrInvalidAddress error when given address is invalid.
ErrNoPreviousHeight error when no previous height is stored.
# Structs
PostgresDriver struct handler for PostgresDB related functions.