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/cdp" "github.com/kava-labs/kava/x/incentive/types" ) var ( CollateralDenoms = []string{} RewardDenom = "ukava" MaxTotalAssetReward = sdk.NewInt(1000000000) ) // RandomizedGenState generates a random GenesisState for incentive module func RandomizedGenState(simState *module.SimulationState) { // Get collateral asset denoms from existing CDP genesis state and pass to incentive params var cdpGenesis cdp.GenesisState simState.Cdc.MustUnmarshalJSON(simState.GenState[cdp.ModuleName], &cdpGenesis) if len(CollateralDenoms) == 0 { for _, collateral := range cdpGenesis.Params.CollateralParams { CollateralDenoms = append(CollateralDenoms, collateral.Denom) } } params := genParams(simState.Rand) // Generate random reward and claim periods rewardPeriods := genRewardPeriods(simState.Rand, simState.GenTimestamp, params.Rewards) claimPeriods := genClaimPeriods(rewardPeriods) claimPeriodIDs := genNextClaimPeriodIds(claimPeriods) // New genesis state holds valid, linked reward periods, claim periods, and claim period IDs incentiveGenesis := types.NewGenesisState(params, types.DefaultPreviousBlockTime, rewardPeriods, claimPeriods, types.Claims{}, claimPeriodIDs) if err := incentiveGenesis.Validate(); err != nil { panic(err) } fmt.Printf("Selected randomly generated %s parameters:\n%s\n", types.ModuleName, codec.MustMarshalJSONIndent(simState.Cdc, incentiveGenesis)) simState.GenState[types.ModuleName] = simState.Cdc.MustMarshalJSON(incentiveGenesis) } // genParams generates random rewards and is active by default func genParams(r *rand.Rand) types.Params { params := types.NewParams(true, genRewards(r)) if err := params.Validate(); err != nil { panic(err) } return params } // genRewards generates rewards for each specified collateral type func genRewards(r *rand.Rand) types.Rewards { rewards := make(types.Rewards, len(CollateralDenoms)) for i, denom := range CollateralDenoms { active := true // total reward is in range (half max total reward, max total reward) amount := simulation.RandIntBetween(r, int(MaxTotalAssetReward.Int64()/2), int(MaxTotalAssetReward.Int64())) totalRewards := sdk.NewInt64Coin(RewardDenom, int64(amount)) // generate a random number of hours between 6-48 to use for reward's times numbHours := simulation.RandIntBetween(r, 6, 48) duration := time.Duration(time.Hour * time.Duration(numbHours)) timeLock := time.Duration(time.Hour * time.Duration(numbHours/2)) // half as long as duration claimDuration := time.Hour * time.Duration(numbHours*2) // twice as long as duration rewards[i] = types.NewReward(active, denom, totalRewards, duration, timeLock, claimDuration) } return rewards } // genRewardPeriods generates chronological reward periods for each given reward type func genRewardPeriods(r *rand.Rand, timestamp time.Time, rewards types.Rewards) types.RewardPeriods { rewardPeriods := make(types.RewardPeriods, len(rewards)) rewardPeriodStart := timestamp for i, reward := range rewards { // Set up reward period parameters start := rewardPeriodStart end := start.Add(reward.Duration).UTC() baseRewardAmount := reward.AvailableRewards.Amount.Quo(sdk.NewInt(100)) // base period reward is 1/100 total reward // Earlier periods have larger rewards amount := sdk.NewCoin(reward.Denom, baseRewardAmount.Mul(sdk.NewInt(int64(i)))) claimEnd := end.Add(reward.ClaimDuration) claimTimeLock := reward.TimeLock // Create reward period and append to array rewardPeriods[i] = types.NewRewardPeriod(reward.Denom, start, end, amount, claimEnd, claimTimeLock) // Update start time of next reward period rewardPeriodStart = end } return rewardPeriods } // genClaimPeriods loads valid claim periods for an array of reward periods func genClaimPeriods(rewardPeriods types.RewardPeriods) types.ClaimPeriods { denomRewardPeriodsCount := make(map[string]uint64) claimPeriods := make(types.ClaimPeriods, len(rewardPeriods)) for i, rewardPeriod := range rewardPeriods { // Increment reward period count for this denom (this is our claim period's ID) denom := rewardPeriod.Denom numbRewardPeriods := denomRewardPeriodsCount[denom] + 1 denomRewardPeriodsCount[denom] = numbRewardPeriods // Set end and timelock from the associated reward period end := rewardPeriod.ClaimEnd claimTimeLock := rewardPeriod.ClaimTimeLock // Create the new claim period for this reward period claimPeriods[i] = types.NewClaimPeriod(denom, numbRewardPeriods, end, claimTimeLock) } return claimPeriods } // genNextClaimPeriodIds returns an array of the most recent claim period IDs for each denom func genNextClaimPeriodIds(cps types.ClaimPeriods) types.GenesisClaimPeriodIDs { // Build a map of the most recent claim periods by denom mostRecentClaimPeriodByDenom := make(map[string]uint64) var claimPeriodIDs types.GenesisClaimPeriodIDs for _, cp := range cps { if cp.ID <= mostRecentClaimPeriodByDenom[cp.Denom] { continue } claimPeriodIDs = append(claimPeriodIDs, types.GenesisClaimPeriodID{Denom: cp.Denom, ID: cp.ID}) mostRecentClaimPeriodByDenom[cp.Denom] = cp.ID } return claimPeriodIDs }