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14 votes
2 answers

What are timestamps and how are they connected to smart contracts?

What exactly are timestamps? When do we see them in IOTA? And what is the correlation between timestamps and smart contracts?
Vrom's user avatar
  • 1,946
5 votes
2 answers

Why aren't timestamps validated?

So, I understand transactions are only validated syntactically, but I'm struggling to understand why that is the case? To be more specific, why isn't there an exactly once (and current timestamp > ...
Junyper's user avatar
  • 53
3 votes
1 answer

When and how is computed the attachment timestamp (and its upper/lower bounds)

In the transaction trytes there are these fields: timestamp (9 trytes); [...] attachment timestamp (9 trytes); attachment timestamp lower bound (9 trytes); attachment timestamp upper bound (9 ...
Diego Stucchi's user avatar
2 votes
2 answers

physical clock or logical clock for timestamping

Timestamps in Tangle are already mandatory and must have a value in a certain range, which seems to be between the last snapshot time (epoch 1517180400, which is GMT: Sunday, January 28, 2018 11:00:00 ...
Casey Yeow's user avatar
1 vote
1 answer

What are the `attachmentTimestampLowerBound` and `attachmentTimestampUpperBound`fields?

Why does a transaction have the fields attachmentTimestampLowerBound and attachmentTimestampUpperBound. What does it mean for a timestamp to have bounds?
shoe's user avatar
  • 251