Implement PrettyPrinter for various staking types and use it in stake CLI

[tjanez]

Example of previous oasis-node stake account info CLI command output:

{"general":{"balance":"601492490765","nonce":8},"escrow":{"active":{"balance":"11242384816640","total_shares":"10000000000000"},"debonding":{"balance":"0","total_shares":"0"},"commission_schedule":{"rates":[{"start":16,"rate":"50000"}],"bounds":[{"start":16,"rate_min":"0","rate_max":"100000"}]},"stake_accumulator":{"claims":{"registry.RegisterEntity":[{"global":"entity"}]}}}}

Example of the new oasis-node stake account info CLI command output:

General Account:
  Balance: 601492490765
  Nonce:   8
Escrow Account:
  Active:
    Balance:      11242384816640
    Total Shares: 10000000000000
  Debonding:
    Balance:      0
    Total Shares: 0
  Commission Schedule:
    Rates:
      - Start: epoch 16
        Rate:  50 %
    Rate Bounds:
      - Start:        epoch 16
        Minimum Rate: 0 %
        Maximum Rate: 100 %
  Stake Accumulator:
    Claims:
      - Name: registry.RegisterEntity
        Staking Thresholds:
          - Global: entity

TODO:

• Update e2e/stake-cli scenario.

[pro-wh]

what do you think about this: annotate "Balance" field as "Balance (base units)"

[kostko]

I think the next step will be to actually support proper units based on the genesis document (#3061). This will probably require some additional context information for the pretty printer. But maybe (base units) could be a good default in case there is no context information available.

[tjanez]

I think the next step will be to actually support proper units based on the genesis document (#3061).

Yes. Currently, the code base doesn't distinguish between tokens and base units. Everything is a token at the moment.

After #3061, I will augment the pretty printers to be able to print the balance in token units or base units.

This will probably require some additional context information for the pretty printer. But maybe (base units) could be a good default in case there is no context information available.

Agreed.

[codecov]

Codecov Report

Merging #3087 into master will decrease coverage by 0.29%.
The diff coverage is 73.17%.

@@            Coverage Diff             @@
##           master    #3087      +/-   ##
==========================================
- Coverage   68.48%   68.19%   -0.30%     
==========================================
  Files         372      372              
  Lines       36734    36814      +80     
==========================================
- Hits        25156    25104      -52     
- Misses       8346     8465     +119     
- Partials     3232     3245      +13     

Impacted Files	Coverage Δ
go/staking/api/api.go	72.72% <68.00%> (-1.40%)	⬇️
go/staking/api/commission.go	95.58% <80.64%> (-3.09%)	⬇️
go/oasis-node/cmd/stake/account.go	57.21% <100.00%> (-0.23%)	⬇️
go/oasis-node/cmd/ias/auth_registry.go	0.00% <0.00%> (-69.24%)	⬇️
go/worker/compute/executor/committee/batch.go	69.23% <0.00%> (-15.39%)	⬇️
go/consensus/tendermint/api/api.go	75.75% <0.00%> (-12.13%)	⬇️
go/worker/compute/executor/committee/state.go	74.07% <0.00%> (-11.12%)	⬇️
go/worker/storage/service_external.go	40.86% <0.00%> (-8.61%)	⬇️
go/consensus/tendermint/abci/state/state.go	61.53% <0.00%> (-7.70%)	⬇️
...ompute/txnscheduler/algorithm/batching/batching.go	78.66% <0.00%> (-6.67%)	⬇️
... and 36 more

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