Use 2^6 KES periods rather than 2^7

[dcoutts]

So instead of 24hr KES periods we will use 36hr ones, and still get 90
days within 64 periods. This makes better use of the space than 128
periods of 24hrs that we chop off at 90 days.

It also brings the header size to under 1kb.

[mrBliss]

I expect this will break the golden tests. To update them: delete the test/golden folder in ouroboros-consensus-shelley-test and ouroboros-consensus-cardano and rerun the respective testsuites (-p Golden to just run the golden tests).

[mrBliss]

I expect this will break the golden tests. To update them: delete the test/golden folder in ouroboros-consensus-shelley-test and ouroboros-consensus-cardano and rerun the respective testsuites (-p Golden to just run the golden tests).

UPDATE: ah, I'm mistaken, we run the golden tests with mock crypto (because we're reusing the examples from cardano-ledger-specs, which use mock crypto), so changing the KES algorithm of the real crypto won't affect the golden tests.

[dcoutts]

bors merge

[iohk-bors]

Build succeeded

• buildkite/ouroboros-network
• ci/hydra:Cardano:ouroboros-network:required