Subspace should be a hash value about desmos HOT 3 CLOSED

I have one comment in the PR #84 (comment)

from desmos.

I'm personally in favor of this change. This would just require one small additional check inside the Validate method of both MsgCreatePost and Post types:

• susbspace should be a valid SHA-256 hash in HEX form

This can be easily done using the following RegEX:

^[a-fA-F0-9]{65}$

from desmos.

This makes sense, also because with only strings we can have users writing "deSmOs", "desm0s" and so on..We will provide a better order using hash so I totally agree with implementing this.

from desmos.