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I was wondering the number of slots the Byron era (testnet) had or the slot number when Byron finished.

The only info I've been able to find is systemStart": "2019-07-24T20:20:16Z" coming from testnet-shelley-genesis.json.

( Calculate timestamp from slot discusses about the same thing but with mainnet Byron. )

Any help would be great. Thanks in advance!

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  • Should you have accepted the answer?
    – gRebel
    Mar 15, 2022 at 3:30
  • @gRebel right, done ✅
    – kindofdev
    Mar 15, 2022 at 9:19

1 Answer 1

Reset to default
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As far as I know, Shelley started at epoch 1, i.e. after a single Byron epoch 0 on Cardano Testnet.

Byron started on Testnet:

epoch 0 ... slot 1031 ... block 1 ... date 2019/07/25 ... time 02:03:56

Shelley started on Testnet:

epoch 1 ... slot 21600 ... block 20570 ... date 2019/07/29 ... time 20:20:16


P.S.

There's also one simple way to check this out. Start downloading a Cardano Testnet DB onto your computer, and, at the very beginning of the process, apply cardano-cli command:

cardano-cli query tip --testnet

But the best solution is to send a request to the IOHK helpdesk.

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  • So systemStart": "2019-07-24T20:20:16Z" coming from testnet-shelley-genesis.json, what does it mean?
    – kindofdev
    Jan 30, 2022 at 20:25
  • I don't know what it means. Testnet explorer shows another date.
    – Andy Jazz
    Jan 30, 2022 at 20:27
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    One more question if you're so kind. When was the slot duration set to 1 sec on Cardano Testnet? At the beginning of Shelley?
    – kindofdev
    Jan 30, 2022 at 21:28
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    No problem, thank you for your help.
    – kindofdev
    Jan 30, 2022 at 21:57
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    Travis found out when 1slot-1sec started, cardano.stackexchange.com/questions/6955/… @AndyJazz
    – kindofdev
    Feb 2, 2022 at 0:32

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