0g-chain/x/kavadist/simulation/genesis.go

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package simulation
import (
"fmt"
"math/rand"
"time"
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/types/module"
"github.com/cosmos/cosmos-sdk/x/simulation"
"github.com/kava-labs/kava/x/kavadist/types"
)
// SecondsPerYear is the number of seconds in a year
const (
SecondsPerYear = 31536000
// BaseAprPadding sets the minimum inflation to the calculated SPR inflation rate from being 0.0
BaseAprPadding = "0.000000003022265980"
)
// RandomizedGenState generates a random GenesisState for kavadist module
func RandomizedGenState(simState *module.SimulationState) {
params := genRandomParams(simState)
if err := params.Validate(); err != nil {
panic(err)
}
kavadistGenesis := types.NewGenesisState(params, types.DefaultPreviousBlockTime)
if err := kavadistGenesis.Validate(); err != nil {
panic(err)
}
fmt.Printf("Selected randomly generated %s parameters:\n%s\n", types.ModuleName, codec.MustMarshalJSONIndent(simState.Cdc, kavadistGenesis))
simState.GenState[types.ModuleName] = simState.Cdc.MustMarshalJSON(kavadistGenesis)
}
func genRandomParams(simState *module.SimulationState) types.Params {
periods := genRandomPeriods(simState.Rand, simState.GenTimestamp)
params := types.NewParams(true, periods)
return params
}
func genRandomPeriods(r *rand.Rand, timestamp time.Time) types.Periods {
var periods types.Periods
numPeriods := simulation.RandIntBetween(r, 1, 10)
periodStart := timestamp
for i := 0; i < numPeriods; i++ {
// set periods to be between 1-3 days
durationMultiplier := simulation.RandIntBetween(r, 1, 3)
duration := time.Duration(int64(24*durationMultiplier)) * time.Hour
periodEnd := periodStart.Add(duration)
inflation := genRandomInflation(r)
period := types.NewPeriod(periodStart, periodEnd, inflation)
periods = append(periods, period)
periodStart = periodEnd
}
return periods
}
func genRandomInflation(r *rand.Rand) sdk.Dec {
// If sim.RandomDecAmount is less than base apr padding, add base apr padding
aprPadding, _ := sdk.NewDecFromStr(BaseAprPadding)
extraAprInflation := simulation.RandomDecAmount(r, sdk.MustNewDecFromStr("0.25"))
for extraAprInflation.LT(aprPadding) {
extraAprInflation = extraAprInflation.Add(aprPadding)
}
aprInflation := sdk.OneDec().Add(extraAprInflation)
// convert APR inflation to SPR (inflation per second)
inflationSpr, err := aprInflation.ApproxRoot(uint64(SecondsPerYear))
if err != nil {
panic(fmt.Sprintf("error generating random inflation %v", err))
}
return inflationSpr
}
func genRandomActive(r *rand.Rand) bool {
threshold := 50
value := simulation.RandIntBetween(r, 1, 100)
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return value > threshold
}