(Feature) Limit number of postcards sent per day

[phahulin]

• What is it? (leave one option)

  • New (Feature) request (i.e. some nice-to-have feature is missing)

• What problem have you encountered (provide steps to reproduce if possible) / What feature are you talking about? To prevent hackery and misuse, I suggest we add an option to limit the number of postcards that can be sent per day. Since primary use-case of this dapp is to verify addresses of poa network validators, even a low limit (~10) should not impose any hardship.

• What is expected behavior / What is proposed feature?

  1. add a configuration option to limit number of postcards that can be sent per 24 hours
  2. current state should be stored in database
  3. when calling createPostcard it should be checked if limit is not exceeded, before actually calling lob api
  4. when user presses ORDER and calls /prepareRegTx it should be checked that limit is not exceeded yet. Error message should be displayed if it is
  5. other functionality (verifying postcards, removing addresses) should still be available

@igorbarinov @pablofullana what do you think?

[igorbarinov]

@phahulin I agree, adding limitations and thresholds is always good