ante: add message validation decorator

[fedekunze]

No description provided.

[codecov]

Codecov Report

Merging #525 into development will increase coverage by 0.10%.
The diff coverage is 28.57%.

@@               Coverage Diff               @@
##           development     #525      +/-   ##
===============================================
+ Coverage        70.49%   70.60%   +0.10%     
===============================================
  Files               41       41              
  Lines             2325     2320       -5     
===============================================
- Hits              1639     1638       -1     
+ Misses             543      538       -5     
- Partials           143      144       +1     

Impacted Files	Coverage Δ
app/ante/ante.go	72.41% <22.22%> (+10.09%)	⬆️
app/ante/eth.go	58.62% <33.33%> (-2.54%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 291dfca...9ffc635. Read the comment docs.