Structs
Constants
Functions
get_contract_version can be use in migrate to read the previous version of this contract
This will make a raw_query to another contract to determine the current version it
claims to be. This should not be trusted, but could be used as a quick filter
if the other contract exists and claims to be a cw20-base contract for example.
(Note: you usually want to require interfaces not implementations of the
contracts you compose with, so be careful of overuse)
set_contract_version should be used in instantiate to store the original version, and after a successful
migrate to update it