`slotLength` should be a float

[klntsky]

Describe what the problem is?

It looks like slotLength values of eraSummaries is rounded to an integer, but actually fractional values are possible too.

E.g. here.

We are having troubles with Plutip integration in CTL when using time conversions: Plutonomicon/cardano-transaction-lib#868 (comment)

What should be the expected behavior?

Can we change the type of slotLength to floating-point number?

[KtorZ]

Arg. That's correct, the JSON encoding relies on some function from cardano-base which does an unsafe conversion to seconds as integers.

I am not a huge fan of floating numbers in interfaces / serializations, but for slot-lengths that sounds reasonable (if only to maintain backward-compatibility for integer values).

Thanks for reporting!