Staking support in cardano-cli

[deepfire]

We need to support staking-related scenarios in CLI tooling, as per Chapter 4 of https://hydra.iohk.io/build/902246/download/1/delegation_design_spec.pdf

This is part of #30

The staking scenarios

0. Stake Pool Registration:
   • manipulation of pool metadata and stake pool registration certificate.
   • submission to the blockchain
   • status queries
1. Querying of the active stake pools (and of their metadata).
2. Delegation support:
   • staking key registration and delegation certificate manipulation
   • submission
   • querying the delegation status
3. Individual staking, which seems to be a variation of the above procedures.

Implementation

Continuing with the established trend, cardano-node will be acting as a validator and the block chain agent, whereas the cardano-cli will deal with forming of the data blobs and generally the UI for the above operations.

The communication between cardano-node and cardano-cli is expected to be at least partly formulated in terms of generalised transactions, but with extensions, since the extended metadata queries, such as for state of pool/staking key/delegation.

An important parallel development is a sister update system node-to-client protocol, which is expected to share a similar structure (generalised transactions + extended status queries).

Dependencies

1. We need proper generalised transaction support for transactions beyond just UTxO expenditures. This is being worked on in Merge update-confirmation and adoption thresholds cardano-ledger#623

[kevinhammond]

In train for Shelley

[Jimbo4350]

Closing as we are currently redefining scope.