Certifications now have a delay before being written
Original change in https://github.com/ucoin-io/ucoin/issues/67
A certification made by member A cannot be written if the last certification from A to any member is aged of less than sigPeriod
.
Protocol rule: https://github.com/ucoin-io/ucoin/blob/master/doc/Protocol.md#certification-chaining
Example
Phase 1
Member A certifies member B, now. The cert is written few minutes later.
Phase 2
Member A, 10 minutes later, certifies member C. This cert cannot be written now, because sigPeriod = 3 days
and cert A to B was just written. But in 3 days, the cert will be able to be written.
Possible behavior for Sakia
So Sakia might refuse to create a certification that won't be written immediately because we've already made a certification few minutes ago.
Or Sakia could add a checkbox in the certification form to make the user confirm "I understand this certification will be written later".