Update dependencies and support PParams value in ShelleyGenesis

[intricate]

No description provided.

[intricate]

@dcoutts: If you prefer that I keep all of the keys in PascalCase, I can drop that change and update the PParams keys to be PascalCase.

[intricate]

@erikd @dcoutts: Any suggestions as to how this value should be formatted? Right now, I'm just deriving the JSON instances for this type, Nonce.

[dcoutts]

Morally it's a Maybe, and a leaf one at that. So it could easily be empty/null or a hash string (as hex, which is probably already the default for that).

[dcoutts]

I don't really care provided it's consistent. We'll have to update the examples in the docs anyway.

[intricate]

We'll have to update the examples in the docs anyway.

Right, I'll do that now.

[dcoutts]

Right, I'll do that now.

If you're doing that, you can also make the story simpler: if the genesis.spec.json is missing, use the shelleyGenesisDefaults and perhaps even write those defaults out to genesis.spec.json so people can edit them. That will make the instructions much nicer.

That also gives us a cheap and cheerful way to print the defaults.

[dcoutts]

LGTM.

Using the defaults and writing out a genesis.spec.json in the create-genesis command would be an excellent bonus.

[Jimbo4350]

According to the hedgehog docs realFrac_ does not shrink. Should we use the double generator here instead?

[erikd]

Shrinking not too important here.

[erikd]

bors r+

[iohk-bors]

Build succeeded

• buildkite/cardano-node
• ci/hydra:Cardano:cardano-node:required