Update genesis params to match early tokenomics in Desmos Introduction

[kwunyeung]

Here are the parameters suggested to be used on Apollo.

x/evidence

Updated max_age_duration in x/evidence to match the unbonding_time in x/staking which is 3 days.

"evidence": {
      ...
      "max_age_duration": "259200s",
      ...
}

x/mint

Initial annual inflation is set to 50%. Setting annual inflation range from 40% to 80%, annual inflation change rate to 40%, bonded goal to 80%. Blocks per year to be 5006000 based on the average 6.3s block time on morpheus-13001.

    "mint": {
      "minter": {
        "inflation": "0.500000000000000000",
        "annual_provisions": "0.000000000000000000"
      },
      "params": {
        "mint_denom": "udaric",
        "inflation_rate_change": "0.400000000000000000",
        "inflation_max": "0.800000000000000000",
        "inflation_min": "0.400000000000000000",
        "goal_bonded": "0.800000000000000000",
        "blocks_per_year": "5006000"
      }
    },

The inflation_rate_change is the change rate which make the inflation move towards to the target inflation between inflation_min and inflation_max according to the goal_bonded. It is defined in the following function.

https://github.com/cosmos/cosmos-sdk/blob/ab24d0ec922836735a9901dcb75f6a57cf405da6/x/mint/types/minter.go#L44

In general, it would be the difference of inflation_max minus inflation_min which means "this is the rate of change from min to max in 1 year". However, if we want to make the see the inflation move faster to the target inflation rate, we can set this value larger.

x/slashing

Updated signed_blocks_window to 7200 and min_signed_per_window to 0.05 based on 6.3s average block time on morpheus-13001. This translates to "a validator will be slashed with 0.01% tokens because of around 12 hours downtime (7200 blocks signing window * 95% misses * 6.3 / 60 mins / 60 seconds).

    "slashing": {
      "params": {
        "signed_blocks_window": "7200",
        "min_signed_per_window": "0.050000000000000000",
        "downtime_jail_duration": "600s",
        "slash_fraction_double_sign": "0.050000000000000000",
        "slash_fraction_downtime": "0.000100000000000000"
      }

[kwunyeung]

Supply should be summed up to 100,000,000,000,000 udaric after adding all the genesis transactions accounts and the faucet we are controlling.

[leobragaz]

Other params looks good. I've tried to start a local node with a genesis edited with those params, no problems at all except for the one that I've suggested the fix. Mint params are very good even from an unexperienced validator perspective 👍