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I'd like to know the exact date when the slot duration was set to 1 sec on Cardano Testnet.

Thanks in advance!

1 Answer 1

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I did a little bit of digging. Block 1597133, created on 2020/07/28 20:20:16 was the first block to use 1 second per slot.

Epoch Slot Block Created Delta Next Slot Delta Next Created Time Per Slot
73 1598398 1597131 2020/07/28 20:19:36 1 00:00:20 00:00:20
73 1598399 1597132 2020/07/28 20:19:56 1 00:00:20 00:00:20
74 1598400 1597133 2020/07/28 20:20:16 20 00:00:20 00:00:01
74 1598420 1597134 2020/07/28 20:20:36 20 00:00:20 00:00:01
74 1598440 1597135 2020/07/28 20:20:56
  • Delta Previous Slot is the difference between the block's slot and the one before it
  • Delta Previous Created is the difference between the blocks creation date and the one before it
  • Time Per Slot is Delta Previous Created divided by Delta Previous Slot

Page on Cardano Testnet Blockchain Explorer with these blocks

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  • great! Thanks a lot!
    – kindofdev
    Feb 1 at 19:24
  • 1
    From the info in the table I'd say that the first block with 1 sec would be 1597133 because the difference in slots with the next one (1597134) is 20 slots.
    – kindofdev
    Feb 3 at 0:00
  • You're right. I've updated my answer
    – Travis
    Feb 4 at 3:57

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