Update delegator rewards to multi-reward index (#945)

* update claim attribute type to MultiRewardIndexes

* update param attribute type to MultiRewardPeriods

* keeper: update params to match types

* keeper: update delegator core keeper methods

* keeper: update InitializeHardDelegatorReward

* keeper: update SynchronizeHardDelegatorRewards

* remove reward factor in favor of reward indexes

* update querier

* fix test: delegator init test

* fix test: delegator sync test

* implement delegator reward accumulation

* fix test: delegator general tests

* add legact types, update v0_11 -> v0_14 migration

* remove duplicate import form v0_15 migration

* implement v0_15incentive migration

* test data and migration test

* add multiple reward denoms to init/sync tests

* update delegator test with multiple reward coins

* clean up simulation sync

migrate/v0_14/migrate.go

@@ -23,8 +23,8 @@ import (
 	v0_14committee "github.com/kava-labs/kava/x/committee/legacy/v0_14"
 	v0_14hard "github.com/kava-labs/kava/x/hard"
 	v0_11hard "github.com/kava-labs/kava/x/hard/legacy/v0_11"
-	v0_14incentive "github.com/kava-labs/kava/x/incentive"
 	v0_11incentive "github.com/kava-labs/kava/x/incentive/legacy/v0_11"
+	v0_14incentive "github.com/kava-labs/kava/x/incentive/legacy/v0_14"
 	"github.com/kava-labs/kava/x/kavadist"
 	v0_11pricefeed "github.com/kava-labs/kava/x/pricefeed"
 	v0_14pricefeed "github.com/kava-labs/kava/x/pricefeed"

migrate/v0_14/migrate_test.go

@@ -24,8 +24,8 @@ import (
 	v0_14committee "github.com/kava-labs/kava/x/committee/legacy/v0_14"
 	v0_14hard "github.com/kava-labs/kava/x/hard"
 	v0_11hard "github.com/kava-labs/kava/x/hard/legacy/v0_11"
-	v0_14incentive "github.com/kava-labs/kava/x/incentive"
 	v0_11incentive "github.com/kava-labs/kava/x/incentive/legacy/v0_11"
+	v0_14incentive "github.com/kava-labs/kava/x/incentive/legacy/v0_14"
 	v0_11pricefeed "github.com/kava-labs/kava/x/pricefeed"
 	validatorvesting "github.com/kava-labs/kava/x/validator-vesting"
 

migrate/v0_15/migrate.go

@@ -12,13 +12,16 @@ import (
 
 	"github.com/kava-labs/kava/app"
 	v0_14committee "github.com/kava-labs/kava/x/committee/legacy/v0_14"
-	"github.com/kava-labs/kava/x/committee/types"
 	v0_15committee "github.com/kava-labs/kava/x/committee/types"
+	v0_14incentive "github.com/kava-labs/kava/x/incentive/legacy/v0_14"
+	v0_15incentive "github.com/kava-labs/kava/x/incentive/types"
 )
 
 var (
 	// TODO: update GenesisTime for kava-8 launch
 	GenesisTime = time.Date(2021, 4, 8, 15, 0, 0, 0, time.UTC)
+	// TODO: update SWP reward per second amount before production
+	SwpRewardsPerSecond = sdk.NewCoin("swp", sdk.OneInt())
 )
 
 // Migrate translates a genesis file from kava v0.14 format to kava v0.15 format
@@ -47,6 +50,15 @@ func Migrate(genDoc tmtypes.GenesisDoc) tmtypes.GenesisDoc {
 // MigrateAppState migrates application state from v0.14 format to a kava v0.15 format
 func MigrateAppState(v0_14AppState genutil.AppMap) genutil.AppMap {
 	v0_15AppState := v0_14AppState
+	cdc := app.MakeCodec()
+
+	// Migrate incentive app state
+	if v0_14AppState[v0_14incentive.ModuleName] != nil {
+		var incentiveGenState v0_14incentive.GenesisState
+		cdc.MustUnmarshalJSON(v0_14AppState[v0_15incentive.ModuleName], &incentiveGenState)
+		delete(v0_14AppState, v0_14incentive.ModuleName)
+		v0_15AppState[v0_15incentive.ModuleName] = cdc.MustMarshalJSON(Incentive(incentiveGenState))
+	}
 
 	// Migrate commmittee app state
 	if v0_14AppState[v0_14committee.ModuleName] != nil {
@@ -75,7 +87,7 @@ func Committee(genesisState v0_14committee.GenesisState) v0_15committee.GenesisS
 	for _, com := range genesisState.Committees {
 		if com.ID == 1 {
 			// Initialize member committee without permissions
-			stabilityCom := types.NewMemberCommittee(com.ID, com.Description, com.Members,
+			stabilityCom := v0_15committee.NewMemberCommittee(com.ID, com.Description, com.Members,
 				[]v0_15committee.Permission{}, com.VoteThreshold, com.ProposalDuration,
 				v0_15committee.FirstPastThePost)
 
@@ -171,7 +183,7 @@ func Committee(genesisState v0_14committee.GenesisState) v0_15committee.GenesisS
 			newStabilityCom := v0_15committee.MemberCommittee{BaseCommittee: baseStabilityCom}
 			committees = append(committees, newStabilityCom)
 		} else {
-			safetyCom := types.NewMemberCommittee(com.ID, com.Description, com.Members,
+			safetyCom := v0_15committee.NewMemberCommittee(com.ID, com.Description, com.Members,
 				[]v0_15committee.Permission{v0_15committee.SoftwareUpgradePermission{}},
 				com.VoteThreshold, com.ProposalDuration, v0_15committee.FirstPastThePost)
 			committees = append(committees, safetyCom)
@@ -179,7 +191,7 @@ func Committee(genesisState v0_14committee.GenesisState) v0_15committee.GenesisS
 	}
 
 	for _, v := range genesisState.Votes {
-		newVote := v0_15committee.NewVote(v.ProposalID, v.Voter, types.Yes)
+		newVote := v0_15committee.NewVote(v.ProposalID, v.Voter, v0_15committee.Yes)
 		votes = append(votes, v0_15committee.Vote(newVote))
 	}
 
@@ -191,3 +203,141 @@ func Committee(genesisState v0_14committee.GenesisState) v0_15committee.GenesisS
 	return v0_15committee.NewGenesisState(
 		genesisState.NextProposalID, committees, proposals, votes)
 }
+
+// Incentive migrates from a v0.14 incentive genesis state to a v0.15 incentive genesis state
+func Incentive(incentiveGS v0_14incentive.GenesisState) v0_15incentive.GenesisState {
+	// Migrate params
+	var claimMultipliers v0_15incentive.Multipliers
+	for _, m := range incentiveGS.Params.ClaimMultipliers {
+		newMultiplier := v0_15incentive.NewMultiplier(v0_15incentive.MultiplierName(m.Name), m.MonthsLockup, m.Factor)
+		claimMultipliers = append(claimMultipliers, newMultiplier)
+	}
+
+	var usdxMintingRewardPeriods v0_15incentive.RewardPeriods
+	for _, rp := range incentiveGS.Params.USDXMintingRewardPeriods {
+		usdxMintingRewardPeriod := v0_15incentive.NewRewardPeriod(rp.Active,
+			rp.CollateralType, rp.Start, rp.End, rp.RewardsPerSecond)
+		usdxMintingRewardPeriods = append(usdxMintingRewardPeriods, usdxMintingRewardPeriod)
+	}
+
+	var hardSupplyRewardPeriods v0_15incentive.MultiRewardPeriods
+	for _, rp := range incentiveGS.Params.HardSupplyRewardPeriods {
+		hardSupplyRewardPeriod := v0_15incentive.NewMultiRewardPeriod(rp.Active,
+			rp.CollateralType, rp.Start, rp.End, rp.RewardsPerSecond)
+		hardSupplyRewardPeriods = append(hardSupplyRewardPeriods, hardSupplyRewardPeriod)
+	}
+
+	var hardBorrowRewardPeriods v0_15incentive.MultiRewardPeriods
+	for _, rp := range incentiveGS.Params.HardBorrowRewardPeriods {
+		hardBorrowRewardPeriod := v0_15incentive.NewMultiRewardPeriod(rp.Active,
+			rp.CollateralType, rp.Start, rp.End, rp.RewardsPerSecond)
+		hardBorrowRewardPeriods = append(hardBorrowRewardPeriods, hardBorrowRewardPeriod)
+	}
+
+	var hardDelegatorRewardPeriods v0_15incentive.MultiRewardPeriods
+	for _, rp := range incentiveGS.Params.HardDelegatorRewardPeriods {
+		rewardsPerSecond := sdk.NewCoins(rp.RewardsPerSecond, SwpRewardsPerSecond)
+		hardDelegatorRewardPeriod := v0_15incentive.NewMultiRewardPeriod(rp.Active,
+			rp.CollateralType, rp.Start, rp.End, rewardsPerSecond)
+		hardDelegatorRewardPeriods = append(hardDelegatorRewardPeriods, hardDelegatorRewardPeriod)
+	}
+
+	// Build new params from migrated values
+	params := v0_15incentive.NewParams(
+		usdxMintingRewardPeriods,
+		hardSupplyRewardPeriods,
+		hardBorrowRewardPeriods,
+		hardDelegatorRewardPeriods,
+		claimMultipliers,
+		incentiveGS.Params.ClaimEnd,
+	)
+
+	// Migrate accumulation times
+	var usdxAccumulationTimes v0_15incentive.GenesisAccumulationTimes
+	for _, t := range incentiveGS.USDXAccumulationTimes {
+		newAccumulationTime := v0_15incentive.NewGenesisAccumulationTime(t.CollateralType, t.PreviousAccumulationTime)
+		usdxAccumulationTimes = append(usdxAccumulationTimes, newAccumulationTime)
+	}
+
+	var hardSupplyAccumulationTimes v0_15incentive.GenesisAccumulationTimes
+	for _, t := range incentiveGS.HardSupplyAccumulationTimes {
+		newAccumulationTime := v0_15incentive.NewGenesisAccumulationTime(t.CollateralType, t.PreviousAccumulationTime)
+		hardSupplyAccumulationTimes = append(hardSupplyAccumulationTimes, newAccumulationTime)
+	}
+
+	var hardBorrowAccumulationTimes v0_15incentive.GenesisAccumulationTimes
+	for _, t := range incentiveGS.HardBorrowAccumulationTimes {
+		newAccumulationTime := v0_15incentive.NewGenesisAccumulationTime(t.CollateralType, t.PreviousAccumulationTime)
+		hardBorrowAccumulationTimes = append(hardBorrowAccumulationTimes, newAccumulationTime)
+	}
+
+	var hardDelegatorAccumulationTimes v0_15incentive.GenesisAccumulationTimes
+	for _, t := range incentiveGS.HardDelegatorAccumulationTimes {
+		newAccumulationTime := v0_15incentive.NewGenesisAccumulationTime(t.CollateralType, t.PreviousAccumulationTime)
+		hardDelegatorAccumulationTimes = append(hardDelegatorAccumulationTimes, newAccumulationTime)
+	}
+
+	// Migrate USDX minting claims
+	var usdxMintingClaims v0_15incentive.USDXMintingClaims
+	for _, claim := range incentiveGS.USDXMintingClaims {
+		var rewardIndexes v0_15incentive.RewardIndexes
+		for _, ri := range claim.RewardIndexes {
+			rewardIndex := v0_15incentive.NewRewardIndex(ri.CollateralType, ri.RewardFactor)
+			rewardIndexes = append(rewardIndexes, rewardIndex)
+		}
+		usdxMintingClaim := v0_15incentive.NewUSDXMintingClaim(claim.Owner, claim.Reward, rewardIndexes)
+		usdxMintingClaims = append(usdxMintingClaims, usdxMintingClaim)
+	}
+
+	// Migrate Hard protocol claims (including delegation rewards)
+	var hardClaims v0_15incentive.HardLiquidityProviderClaims
+	for _, claim := range incentiveGS.HardLiquidityProviderClaims {
+		// Migrate supply multi reward indexes
+		var supplyMultiRewardIndexes v0_15incentive.MultiRewardIndexes
+		for _, sri := range claim.SupplyRewardIndexes {
+			var rewardIndexes v0_15incentive.RewardIndexes
+			for _, ri := range sri.RewardIndexes {
+				rewardIndex := v0_15incentive.NewRewardIndex(ri.CollateralType, ri.RewardFactor)
+				rewardIndexes = append(rewardIndexes, rewardIndex)
+			}
+			supplyMultiRewardIndex := v0_15incentive.NewMultiRewardIndex(sri.CollateralType, rewardIndexes)
+			supplyMultiRewardIndexes = append(supplyMultiRewardIndexes, supplyMultiRewardIndex)
+		}
+
+		// Migrate borrow multi reward indexes
+		var borrowMultiRewardIndexes v0_15incentive.MultiRewardIndexes
+		for _, bri := range claim.BorrowRewardIndexes {
+			var rewardIndexes v0_15incentive.RewardIndexes
+			for _, ri := range bri.RewardIndexes {
+				rewardIndex := v0_15incentive.NewRewardIndex(ri.CollateralType, ri.RewardFactor)
+				rewardIndexes = append(rewardIndexes, rewardIndex)
+			}
+			borrowMultiRewardIndex := v0_15incentive.NewMultiRewardIndex(bri.CollateralType, rewardIndexes)
+			borrowMultiRewardIndexes = append(borrowMultiRewardIndexes, borrowMultiRewardIndex)
+		}
+
+		// Migrate delegator reward indexes to multi reward indexes under BondDenom
+		var delegatorMultiRewardIndexes v0_15incentive.MultiRewardIndexes
+		var delegatorRewardIndexes v0_15incentive.RewardIndexes
+		for _, ri := range claim.DelegatorRewardIndexes {
+			delegatorRewardIndex := v0_15incentive.NewRewardIndex(ri.CollateralType, ri.RewardFactor)
+			delegatorRewardIndexes = append(delegatorRewardIndexes, delegatorRewardIndex)
+		}
+		delegatorMultiRewardIndex := v0_15incentive.NewMultiRewardIndex(v0_15incentive.BondDenom, delegatorRewardIndexes)
+		delegatorMultiRewardIndexes = append(delegatorMultiRewardIndexes, delegatorMultiRewardIndex)
+
+		hardClaim := v0_15incentive.NewHardLiquidityProviderClaim(claim.Owner, claim.Reward,
+			supplyMultiRewardIndexes, borrowMultiRewardIndexes, delegatorMultiRewardIndexes)
+		hardClaims = append(hardClaims, hardClaim)
+	}
+
+	return v0_15incentive.NewGenesisState(
+		params,
+		usdxAccumulationTimes,
+		hardSupplyAccumulationTimes,
+		hardBorrowAccumulationTimes,
+		hardDelegatorAccumulationTimes,
+		usdxMintingClaims,
+		hardClaims,
+	)
+}

migrate/v0_15/migrate_test.go

@@ -12,7 +12,8 @@ import (
 	"github.com/kava-labs/kava/app"
 	v0_14committee "github.com/kava-labs/kava/x/committee/legacy/v0_14"
 	v0_15committee "github.com/kava-labs/kava/x/committee/types"
-
+	v0_14incentive "github.com/kava-labs/kava/x/incentive/legacy/v0_14"
+	v0_15incentive "github.com/kava-labs/kava/x/incentive/types"
 	"github.com/stretchr/testify/require"
 )
 
@@ -54,3 +55,23 @@ func TestCommittee(t *testing.T) {
 	require.Equal(t, len(oldSPCP.AllowedMarkets), len(newSPCP.AllowedMarkets))
 	require.Equal(t, len(oldSPCP.AllowedMoneyMarkets), len(newSPCP.AllowedMoneyMarkets))
 }
+
+func TestIncentive(t *testing.T) {
+	bz, err := ioutil.ReadFile(filepath.Join("testdata", "kava-7-incentive-state.json"))
+	require.NoError(t, err)
+	var oldIncentiveGenState v0_14incentive.GenesisState
+	cdc := app.MakeCodec()
+	require.NotPanics(t, func() {
+		cdc.MustUnmarshalJSON(bz, &oldIncentiveGenState)
+	})
+
+	newGenState := v0_15incentive.GenesisState{}
+	require.NotPanics(t, func() {
+		newGenState = Incentive(oldIncentiveGenState)
+	})
+	err = newGenState.Validate()
+	require.NoError(t, err)
+
+	require.Equal(t, len(oldIncentiveGenState.USDXMintingClaims), len(newGenState.USDXMintingClaims))
+	require.Equal(t, len(oldIncentiveGenState.HardLiquidityProviderClaims), len(newGenState.HardLiquidityProviderClaims))
+}

x/incentive/alias.go

@@ -104,7 +104,7 @@ var (
 	PreviousHardSupplyRewardAccrualTimeKeyPrefix    = types.PreviousHardSupplyRewardAccrualTimeKeyPrefix
 	HardBorrowRewardIndexesKeyPrefix                = types.HardBorrowRewardIndexesKeyPrefix
 	PreviousHardBorrowRewardAccrualTimeKeyPrefix    = types.PreviousHardBorrowRewardAccrualTimeKeyPrefix
-	HardDelegatorRewardFactorKeyPrefix              = types.HardDelegatorRewardFactorKeyPrefix
+	HardDelegatorRewardIndexesKeyPrefix             = types.HardDelegatorRewardIndexesKeyPrefix
 	PreviousHardDelegatorRewardAccrualTimeKeyPrefix = types.PreviousHardDelegatorRewardAccrualTimeKeyPrefix
 	USDXMintingRewardDenom                          = types.USDXMintingRewardDenom
 	HardLiquidityRewardDenom                        = types.HardLiquidityRewardDenom

x/incentive/genesis.go

@@ -48,8 +48,13 @@ func InitGenesis(ctx sdk.Context, k keeper.Keeper, supplyKeeper types.SupplyKeep
 		k.SetHardBorrowRewardIndexes(ctx, mrp.CollateralType, newRewardIndexes)
 	}
 
-	for _, rp := range gs.Params.HardDelegatorRewardPeriods {
+	for _, drp := range gs.Params.HardDelegatorRewardPeriods {
-		k.SetHardDelegatorRewardFactor(ctx, rp.CollateralType, sdk.ZeroDec())
+		newRewardIndexes := types.RewardIndexes{}
+		for _, rc := range drp.RewardsPerSecond {
+			ri := types.NewRewardIndex(rc.Denom, sdk.ZeroDec())
+			newRewardIndexes = append(newRewardIndexes, ri)
+		}
+		k.SetHardDelegatorRewardIndexes(ctx, drp.CollateralType, newRewardIndexes)
 	}
 
 	k.SetParams(ctx, gs.Params)
@@ -94,9 +99,11 @@ func InitGenesis(ctx sdk.Context, k keeper.Keeper, supplyKeeper types.SupplyKeep
 				}
 			}
 		}
-		for j, ri := range claim.DelegatorRewardIndexes {
+		for j, dri := range claim.DelegatorRewardIndexes {
+			for k, ri := range dri.RewardIndexes {
 				if ri.RewardFactor != sdk.ZeroDec() {
-				gs.HardLiquidityProviderClaims[i].DelegatorRewardIndexes[j].RewardFactor = sdk.ZeroDec()
+					gs.HardLiquidityProviderClaims[i].DelegatorRewardIndexes[j].RewardIndexes[k].RewardFactor = sdk.ZeroDec()
+				}
 			}
 		}
 		k.SetHardLiquidityProviderClaim(ctx, claim)
@@ -140,8 +147,10 @@ func ExportGenesis(ctx sdk.Context, k keeper.Keeper) types.GenesisState {
 				claim.SupplyRewardIndexes[i].RewardIndexes[j].RewardFactor = sdk.ZeroDec()
 			}
 		}
-		for i := range claim.DelegatorRewardIndexes {
+		for i, dri := range claim.DelegatorRewardIndexes {
-			claim.DelegatorRewardIndexes[i].RewardFactor = sdk.ZeroDec()
+			for j := range dri.RewardIndexes {
+				claim.DelegatorRewardIndexes[i].RewardIndexes[j].RewardFactor = sdk.ZeroDec()
+			}
 		}
 		synchronizedHardClaims = append(synchronizedHardClaims, claim)
 	}

x/incentive/genesis_test.go

@@ -64,8 +64,7 @@ func (suite *GenesisTestSuite) SetupTest() {
 			incentive.RewardPeriods{incentive.NewRewardPeriod(true, "bnb-a", suite.genesisTime.Add(-1*oneYear), suite.genesisTime.Add(oneYear), c("ukava", 122354))},
 			incentive.MultiRewardPeriods{incentive.NewMultiRewardPeriod(true, "bnb", suite.genesisTime.Add(-1*oneYear), suite.genesisTime.Add(oneYear), cs(c("hard", 122354)))},
 			incentive.MultiRewardPeriods{incentive.NewMultiRewardPeriod(true, "bnb", suite.genesisTime.Add(-1*oneYear), suite.genesisTime.Add(oneYear), cs(c("hard", 122354)))},
-			incentive.RewardPeriods{incentive.NewRewardPeriod(true, "ukava", suite.genesisTime.Add(-1*oneYear), suite.genesisTime.Add(oneYear), c("hard", 122354))},
+			incentive.MultiRewardPeriods{incentive.NewMultiRewardPeriod(true, "ukava", suite.genesisTime.Add(-1*oneYear), suite.genesisTime.Add(oneYear), cs(c("hard", 122354)))}, incentive.Multipliers{incentive.NewMultiplier(incentive.Small, 1, d("0.25")), incentive.NewMultiplier(incentive.Large, 12, d("1.0"))},
-			incentive.Multipliers{incentive.NewMultiplier(incentive.Small, 1, d("0.25")), incentive.NewMultiplier(incentive.Large, 12, d("1.0"))},
 			suite.genesisTime.Add(5*oneYear),
 		),
 		incentive.DefaultGenesisAccumulationTimes,

x/incentive/handler_test.go

@@ -47,7 +47,7 @@ func (suite *HandlerTestSuite) SetupTest() {
 			incentive.RewardPeriods{incentive.NewRewardPeriod(true, "bnb-a", time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), time.Date(2024, 12, 15, 14, 0, 0, 0, time.UTC), c("ukava", 122354))},
 			incentive.MultiRewardPeriods{incentive.NewMultiRewardPeriod(true, "bnb-a", time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), time.Date(2024, 12, 15, 14, 0, 0, 0, time.UTC), cs(c("ukava", 122354)))},
 			incentive.MultiRewardPeriods{incentive.NewMultiRewardPeriod(true, "bnb-a", time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), time.Date(2024, 12, 15, 14, 0, 0, 0, time.UTC), cs(c("ukava", 122354)))},
-			incentive.RewardPeriods{incentive.NewRewardPeriod(true, "bnb-a", time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), time.Date(2024, 12, 15, 14, 0, 0, 0, time.UTC), c("ukava", 122354))},
+			incentive.MultiRewardPeriods{incentive.NewMultiRewardPeriod(true, "bnb-a", time.Date(2020, 12, 15, 14, 0, 0, 0, time.UTC), time.Date(2024, 12, 15, 14, 0, 0, 0, time.UTC), cs(c("ukava", 122354)))},
 			incentive.Multipliers{incentive.NewMultiplier(incentive.MultiplierName("small"), 1, d("0.25")), incentive.NewMultiplier(incentive.MultiplierName("large"), 12, d("1.0"))},
 			time.Date(2025, 12, 15, 14, 0, 0, 0, time.UTC),
 		),
@@ -88,10 +88,9 @@ func (suite *HandlerTestSuite) addHardLiquidityProviderClaim() {
 	err := sk.MintCoins(suite.ctx, kavadist.ModuleName, cs(c("ukava", 1000000000000)))
 	suite.Require().NoError(err)
 	rewardPeriod := types.RewardIndexes{types.NewRewardIndex("bnb-s", sdk.ZeroDec())}
-
 	multiRewardIndex := types.NewMultiRewardIndex("bnb-s", rewardPeriod)
 	multiRewardIndexes := types.MultiRewardIndexes{multiRewardIndex}
-	c1 := incentive.NewHardLiquidityProviderClaim(suite.addrs[0], cs(c("ukava", 1000000)), multiRewardIndexes, multiRewardIndexes, rewardPeriod)
+	c1 := incentive.NewHardLiquidityProviderClaim(suite.addrs[0], cs(c("ukava", 1000000)), multiRewardIndexes, multiRewardIndexes, multiRewardIndexes)
 	suite.NotPanics(func() {
 		suite.keeper.SetHardLiquidityProviderClaim(suite.ctx, c1)
 	})

x/incentive/integration_test.go

@@ -157,7 +157,7 @@ func NewIncentiveGenState(previousAccumTime, endTime time.Time, rewardPeriods ..
 			rewardPeriods,
 			types.MultiRewardPeriods{},
 			types.MultiRewardPeriods{},
-			types.RewardPeriods{},
+			types.MultiRewardPeriods{},
 			incentive.Multipliers{
 				incentive.NewMultiplier(incentive.Small, 1, d("0.25")),
 				incentive.NewMultiplier(incentive.Large, 12, d("1.0")),

x/incentive/keeper/integration_test.go

@@ -278,7 +278,7 @@ func (builder IncentiveGenesisBuilder) WithSimpleSupplyRewardPeriod(ctype string
 		rewardsPerSecond,
 	))
 }
-func (builder IncentiveGenesisBuilder) WithInitializedDelegatorRewardPeriod(period types.RewardPeriod) IncentiveGenesisBuilder {
+func (builder IncentiveGenesisBuilder) WithInitializedDelegatorRewardPeriod(period types.MultiRewardPeriod) IncentiveGenesisBuilder {
 	builder.Params.HardDelegatorRewardPeriods = append(builder.Params.HardDelegatorRewardPeriods, period)
 
 	accumulationTimeForPeriod := types.NewGenesisAccumulationTime(period.CollateralType, builder.genesisTime)
@@ -286,8 +286,8 @@ func (builder IncentiveGenesisBuilder) WithInitializedDelegatorRewardPeriod(peri
 	return builder
 }
 
-func (builder IncentiveGenesisBuilder) WithSimpleDelegatorRewardPeriod(ctype string, rewardsPerSecond sdk.Coin) IncentiveGenesisBuilder {
+func (builder IncentiveGenesisBuilder) WithSimpleDelegatorRewardPeriod(ctype string, rewardsPerSecond sdk.Coins) IncentiveGenesisBuilder {
-	return builder.WithInitializedDelegatorRewardPeriod(types.NewRewardPeriod(
+	return builder.WithInitializedDelegatorRewardPeriod(types.NewMultiRewardPeriod(
 		true,
 		ctype,
 		builder.genesisTime,

x/incentive/keeper/keeper.go

@@ -273,32 +273,34 @@ func (k Keeper) IterateHardBorrowRewardIndexes(ctx sdk.Context, cb func(denom st
 	}
 }
 
-// GetHardDelegatorRewardFactor returns the current reward factor for an individual collateral type
+// GetHardDelegatorRewardIndexes gets the current reward indexes for an individual denom
-func (k Keeper) GetHardDelegatorRewardFactor(ctx sdk.Context, ctype string) (factor sdk.Dec, found bool) {
+func (k Keeper) GetHardDelegatorRewardIndexes(ctx sdk.Context, denom string) (types.RewardIndexes, bool) {
-	store := prefix.NewStore(ctx.KVStore(k.key), types.HardDelegatorRewardFactorKeyPrefix)
+	store := prefix.NewStore(ctx.KVStore(k.key), types.HardDelegatorRewardIndexesKeyPrefix)
-	bz := store.Get([]byte(ctype))
+	bz := store.Get([]byte(denom))
 	if bz == nil {
-		return sdk.ZeroDec(), false
+		return types.RewardIndexes{}, false
 	}
-	k.cdc.MustUnmarshalBinaryBare(bz, &factor)
+	var rewardIndexes types.RewardIndexes
-	return factor, true
+	k.cdc.MustUnmarshalBinaryBare(bz, &rewardIndexes)
+	return rewardIndexes, true
 }
 
-// SetHardDelegatorRewardFactor sets the current reward factor for an individual collateral type
+// SetHardDelegatorRewardIndexes sets the current reward indexes for an individual denom
-func (k Keeper) SetHardDelegatorRewardFactor(ctx sdk.Context, ctype string, factor sdk.Dec) {
+func (k Keeper) SetHardDelegatorRewardIndexes(ctx sdk.Context, denom string, indexes types.RewardIndexes) {
-	store := prefix.NewStore(ctx.KVStore(k.key), types.HardDelegatorRewardFactorKeyPrefix)
+	store := prefix.NewStore(ctx.KVStore(k.key), types.HardDelegatorRewardIndexesKeyPrefix)
-	store.Set([]byte(ctype), k.cdc.MustMarshalBinaryBare(factor))
+	bz := k.cdc.MustMarshalBinaryBare(indexes)
+	store.Set([]byte(denom), bz)
 }
 
-// IterateHardDelegatorRewardFactors iterates over all Hard delegator reward factor objects in the store and preforms a callback function
+// IterateHardDelegatorRewardIndexes iterates over all Delegator reward index objects in the store and preforms a callback function
-func (k Keeper) IterateHardDelegatorRewardFactors(ctx sdk.Context, cb func(denom string, factor sdk.Dec) (stop bool)) {
+func (k Keeper) IterateHardDelegatorRewardIndexes(ctx sdk.Context, cb func(denom string, indexes types.RewardIndexes) (stop bool)) {
-	store := prefix.NewStore(ctx.KVStore(k.key), types.HardDelegatorRewardFactorKeyPrefix)
+	store := prefix.NewStore(ctx.KVStore(k.key), types.HardDelegatorRewardIndexesKeyPrefix)
 	iterator := sdk.KVStorePrefixIterator(store, []byte{})
 	defer iterator.Close()
 	for ; iterator.Valid(); iterator.Next() {
-		var factor sdk.Dec
+		var indexes types.RewardIndexes
-		k.cdc.MustUnmarshalBinaryBare(iterator.Value(), &factor)
+		k.cdc.MustUnmarshalBinaryBare(iterator.Value(), &indexes)
-		if cb(string(iterator.Key()), factor) {
+		if cb(string(iterator.Key()), indexes) {
 			break
 		}
 	}

x/incentive/keeper/params.go

@@ -54,14 +54,14 @@ func (k Keeper) GetHardBorrowRewardPeriods(ctx sdk.Context, denom string) (types
 }
 
 // GetHardDelegatorRewardPeriod returns the reward period with the specified collateral type if it's found in the params
-func (k Keeper) GetHardDelegatorRewardPeriod(ctx sdk.Context, denom string) (types.RewardPeriod, bool) {
+func (k Keeper) GetHardDelegatorRewardPeriods(ctx sdk.Context, denom string) (types.MultiRewardPeriod, bool) {
 	params := k.GetParams(ctx)
 	for _, rp := range params.HardDelegatorRewardPeriods {
 		if rp.CollateralType == denom {
 			return rp, true
 		}
 	}
-	return types.RewardPeriod{}, false
+	return types.MultiRewardPeriod{}, false
 }
 
 // GetMultiplier returns the multiplier with the specified name if it's found in the params

x/incentive/keeper/querier.go

@@ -223,9 +223,9 @@ func queryGetRewardFactors(ctx sdk.Context, req abci.RequestQuery, k Keeper) ([]
 		if found {
 			rewardFactor.HardBorrowRewardFactors = hardBorrowRewardIndexes
 		}
-		hardDelegatorRewardFactor, found := k.GetHardDelegatorRewardFactor(ctx, params.Denom)
+		hardDelegatorRewardIndexes, found := k.GetHardDelegatorRewardIndexes(ctx, params.Denom)
 		if found {
-			rewardFactor.HardDelegatorRewardFactor = hardDelegatorRewardFactor
+			rewardFactor.HardDelegatorRewardFactors = hardDelegatorRewardIndexes
 		}
 		rewardFactors = append(rewardFactors, rewardFactor)
 	} else {
@@ -263,12 +263,12 @@ func queryGetRewardFactors(ctx sdk.Context, req abci.RequestQuery, k Keeper) ([]
 		})
 
 		// Populate mapping with Hard delegator reward factors
-		k.IterateHardDelegatorRewardFactors(ctx, func(denom string, factor sdk.Dec) (stop bool) {
+		k.IterateHardDelegatorRewardIndexes(ctx, func(denom string, indexes types.RewardIndexes) (stop bool) {
 			rewardFactor, ok := rewardFactorMap[denom]
 			if !ok {
-				rewardFactor = types.RewardFactor{Denom: denom, HardDelegatorRewardFactor: factor}
+				rewardFactor = types.RewardFactor{Denom: denom, HardDelegatorRewardFactors: indexes}
 			} else {
-				rewardFactor.HardDelegatorRewardFactor = factor
+				rewardFactor.HardDelegatorRewardFactors = indexes
 			}
 			rewardFactorMap[denom] = rewardFactor
 			return false

x/incentive/keeper/rewards_delegator.go

@@ -9,37 +9,57 @@ import (
 )
 
 // AccumulateHardDelegatorRewards updates the rewards accumulated for the input reward period
-func (k Keeper) AccumulateHardDelegatorRewards(ctx sdk.Context, rewardPeriod types.RewardPeriod) error {
+func (k Keeper) AccumulateHardDelegatorRewards(ctx sdk.Context, rewardPeriods types.MultiRewardPeriod) error {
-	previousAccrualTime, found := k.GetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriod.CollateralType)
+	previousAccrualTime, found := k.GetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriods.CollateralType)
 	if !found {
-		k.SetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
+		k.SetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriods.CollateralType, ctx.BlockTime())
 		return nil
 	}
-	timeElapsed := CalculateTimeElapsed(rewardPeriod.Start, rewardPeriod.End, ctx.BlockTime(), previousAccrualTime)
+	timeElapsed := CalculateTimeElapsed(rewardPeriods.Start, rewardPeriods.End, ctx.BlockTime(), previousAccrualTime)
 	if timeElapsed.IsZero() {
 		return nil
 	}
-	if rewardPeriod.RewardsPerSecond.Amount.IsZero() {
+	if rewardPeriods.RewardsPerSecond.IsZero() {
-		k.SetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
+		k.SetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriods.CollateralType, ctx.BlockTime())
 		return nil
 	}
 
 	totalBonded := k.stakingKeeper.TotalBondedTokens(ctx).ToDec()
 	if totalBonded.IsZero() {
-		k.SetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
+		k.SetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriods.CollateralType, ctx.BlockTime())
 		return nil
 	}
 
-	newRewards := timeElapsed.Mul(rewardPeriod.RewardsPerSecond.Amount)
+	previousRewardIndexes, found := k.GetHardDelegatorRewardIndexes(ctx, rewardPeriods.CollateralType)
-	rewardFactor := newRewards.ToDec().Quo(totalBonded)
-
-	previousRewardFactor, found := k.GetHardDelegatorRewardFactor(ctx, rewardPeriod.CollateralType)
 	if !found {
-		previousRewardFactor = sdk.ZeroDec()
+		for _, rewardCoin := range rewardPeriods.RewardsPerSecond {
+			rewardIndex := types.NewRewardIndex(rewardCoin.Denom, sdk.ZeroDec())
+			previousRewardIndexes = append(previousRewardIndexes, rewardIndex)
 		}
-	newRewardFactor := previousRewardFactor.Add(rewardFactor)
+		k.SetHardDelegatorRewardIndexes(ctx, rewardPeriods.CollateralType, previousRewardIndexes)
-	k.SetHardDelegatorRewardFactor(ctx, rewardPeriod.CollateralType, newRewardFactor)
+	}
-	k.SetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
+
+	newRewardIndexes := previousRewardIndexes
+	for _, rewardCoin := range rewardPeriods.RewardsPerSecond {
+		newRewards := rewardCoin.Amount.ToDec().Mul(timeElapsed.ToDec())
+		previousRewardIndex, found := previousRewardIndexes.GetRewardIndex(rewardCoin.Denom)
+		if !found {
+			previousRewardIndex = types.NewRewardIndex(rewardCoin.Denom, sdk.ZeroDec())
+		}
+
+		// Calculate new reward factor and update reward index
+		rewardFactor := newRewards.Quo(totalBonded)
+		newRewardFactorValue := previousRewardIndex.RewardFactor.Add(rewardFactor)
+		newRewardIndex := types.NewRewardIndex(rewardCoin.Denom, newRewardFactorValue)
+		i, found := newRewardIndexes.GetFactorIndex(rewardCoin.Denom)
+		if found {
+			newRewardIndexes[i] = newRewardIndex
+		} else {
+			newRewardIndexes = append(newRewardIndexes, newRewardIndex)
+		}
+	}
+	k.SetHardDelegatorRewardIndexes(ctx, rewardPeriods.CollateralType, newRewardIndexes)
+	k.SetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriods.CollateralType, ctx.BlockTime())
 	return nil
 }
 
@@ -53,13 +73,14 @@ func (k Keeper) InitializeHardDelegatorReward(ctx sdk.Context, delegator sdk.Acc
 		claim, _ = k.GetHardLiquidityProviderClaim(ctx, delegator)
 	}
 
-	globalRewardFactor, found := k.GetHardDelegatorRewardFactor(ctx, types.BondDenom)
+	var delegatorRewardIndexes types.MultiRewardIndexes
+	globalRewardIndexes, found := k.GetHardDelegatorRewardIndexes(ctx, types.BondDenom)
 	if !found {
-		// If there's no global delegator reward factor, initialize the claim with a delegator factor of zero.
+		globalRewardIndexes = types.RewardIndexes{}
-		globalRewardFactor = sdk.ZeroDec()
 	}
+	delegatorRewardIndexes = delegatorRewardIndexes.With(types.BondDenom, globalRewardIndexes)
 
-	claim.DelegatorRewardIndexes = types.RewardIndexes{types.NewRewardIndex(types.BondDenom, globalRewardFactor)}
+	claim.DelegatorRewardIndexes = delegatorRewardIndexes
 	k.SetHardLiquidityProviderClaim(ctx, claim)
 }
 
@@ -72,7 +93,7 @@ func (k Keeper) SynchronizeHardDelegatorRewards(ctx sdk.Context, delegator sdk.A
 		return
 	}
 
-	globalRewardFactor, found := k.GetHardDelegatorRewardFactor(ctx, types.BondDenom)
+	globalRewardIndexes, found := k.GetHardDelegatorRewardIndexes(ctx, types.BondDenom)
 	if !found {
 		// The global factor is only not found if
 		// - the bond denom has not started accumulating rewards yet (either there is no reward specified in params, or the reward start time hasn't been hit)
@@ -83,27 +104,25 @@ func (k Keeper) SynchronizeHardDelegatorRewards(ctx sdk.Context, delegator sdk.A
 		return
 	}
 
-	userRewardFactor, found := claim.DelegatorRewardIndexes.Get(types.BondDenom)
+	userRewardIndexes, found := claim.DelegatorRewardIndexes.Get(types.BondDenom)
 	if !found {
 		// Normally the factor should always be found, as it is added in InitializeHardDelegatorReward when a user delegates.
 		// However if there were no delegator rewards (ie no reward period in params) then a reward period is added, existing claims will not have the factor.
 		// So assume the factor is the starting value for any global factor: 0.
-		userRewardFactor = sdk.ZeroDec()
+		userRewardIndexes = types.RewardIndexes{}
 	}
 
 	totalDelegated := k.GetTotalDelegated(ctx, delegator, valAddr, shouldIncludeValidator)
 
-	rewardsEarned, err := k.CalculateSingleReward(userRewardFactor, globalRewardFactor, totalDelegated)
+	rewardsEarned, err := k.CalculateRewards(userRewardIndexes, globalRewardIndexes, totalDelegated)
 	if err != nil {
 		// Global reward factors should never decrease, as it would lead to a negative update to claim.Rewards.
 		// This panics if a global reward factor decreases or disappears between the old and new indexes.
 		panic(fmt.Sprintf("corrupted global reward indexes found: %v", err))
 	}
-	newRewardsCoin := sdk.NewCoin(types.HardLiquidityRewardDenom, rewardsEarned)
-
-	claim.Reward = claim.Reward.Add(newRewardsCoin)
-	claim.DelegatorRewardIndexes = claim.DelegatorRewardIndexes.With(types.BondDenom, globalRewardFactor)
 
+	claim.Reward = claim.Reward.Add(rewardsEarned...)
+	claim.DelegatorRewardIndexes = claim.DelegatorRewardIndexes.With(types.BondDenom, globalRewardIndexes)
 	k.SetHardLiquidityProviderClaim(ctx, claim)
 }
 

x/incentive/keeper/rewards_delegator_init_test.go

@@ -27,9 +27,10 @@ func TestInitializeHardDelegatorReward(t *testing.T) {
 	suite.Run(t, new(InitializeHardDelegatorRewardTests))
 }
 
-func (suite *InitializeHardDelegatorRewardTests) storeGlobalDelegatorFactor(rewardIndexes types.RewardIndexes) {
+// Hardcoded to use bond denom
-	factor := rewardIndexes[0]
+func (suite *InitializeHardDelegatorRewardTests) storeGlobalDelegatorFactor(multiRewardIndexes types.MultiRewardIndexes) {
-	suite.keeper.SetHardDelegatorRewardFactor(suite.ctx, factor.CollateralType, factor.RewardFactor)
+	multiRewardIndex, _ := multiRewardIndexes.GetRewardIndex(types.BondDenom)
+	suite.keeper.SetHardDelegatorRewardIndexes(suite.ctx, types.BondDenom, multiRewardIndex.RewardIndexes)
 }
 
 func (suite *InitializeHardDelegatorRewardTests) TestClaimIndexesAreSetWhenClaimDoesNotExist() {
@@ -70,19 +71,30 @@ func (suite *InitializeHardDelegatorRewardTests) TestClaimIsSyncedAndIndexesAreS
 
 	// Set the global factor to a value different to one in claim so
 	// we can detect if it is overwritten.
-	globalIndex := increaseRewardFactors(claim.DelegatorRewardIndexes)
+	rewardIndexes, _ := claim.DelegatorRewardIndexes.Get(types.BondDenom)
-	suite.storeGlobalDelegatorFactor(globalIndex)
+	globalIndexes := increaseRewardFactors(rewardIndexes)
+
+	// Update the claim object with the new global factor
+	bondIndex, _ := claim.DelegatorRewardIndexes.GetRewardIndexIndex(types.BondDenom)
+	claim.DelegatorRewardIndexes[bondIndex].RewardIndexes = globalIndexes
+	suite.storeGlobalDelegatorFactor(claim.DelegatorRewardIndexes)
 
 	suite.keeper.InitializeHardDelegatorReward(suite.ctx, claim.Owner)
 
 	syncedClaim, _ := suite.keeper.GetHardLiquidityProviderClaim(suite.ctx, claim.Owner)
-	suite.Equal(globalIndex, syncedClaim.DelegatorRewardIndexes)
+	suite.Equal(globalIndexes, syncedClaim.DelegatorRewardIndexes[bondIndex].RewardIndexes)
 	suite.Truef(syncedClaim.Reward.IsAllGT(claim.Reward), "'%s' not greater than '%s'", syncedClaim.Reward, claim.Reward)
 }
 
 // arbitraryDelegatorRewardIndexes contains only one reward index as there is only every one bond denom
-var arbitraryDelegatorRewardIndexes = types.RewardIndexes{
+var arbitraryDelegatorRewardIndexes = types.MultiRewardIndexes{
-	types.NewRewardIndex(types.BondDenom, d("0.2")),
+	types.NewMultiRewardIndex(
+		types.BondDenom,
+		types.RewardIndexes{
+			types.NewRewardIndex("hard", d("0.2")),
+			types.NewRewardIndex("swp", d("0.2")),
+		},
+	),
 }
 
 type fakeStakingKeeper struct {

x/incentive/keeper/rewards_delegator_sync_test.go

@@ -28,9 +28,9 @@ func TestSynchronizeHardDelegatorReward(t *testing.T) {
 	suite.Run(t, new(SynchronizeHardDelegatorRewardTests))
 }
 
-func (suite *SynchronizeHardDelegatorRewardTests) storeGlobalDelegatorFactor(rewardIndexes types.RewardIndexes) {
+func (suite *SynchronizeHardDelegatorRewardTests) storeGlobalDelegatorFactor(multiRewardIndexes types.MultiRewardIndexes) {
-	factor := rewardIndexes[0]
+	multiRewardIndex, _ := multiRewardIndexes.GetRewardIndex(types.BondDenom)
-	suite.keeper.SetHardDelegatorRewardFactor(suite.ctx, factor.CollateralType, factor.RewardFactor)
+	suite.keeper.SetHardDelegatorRewardIndexes(suite.ctx, types.BondDenom, multiRewardIndex.RewardIndexes)
 }
 
 func (suite *SynchronizeHardDelegatorRewardTests) TestClaimIndexesAreUnchangedWhenGlobalFactorUnchanged() {
@@ -68,14 +68,20 @@ func (suite *SynchronizeHardDelegatorRewardTests) TestClaimIndexesAreUpdatedWhen
 	}
 	suite.storeClaim(claim)
 
-	globalIndexes := increaseRewardFactors(claim.DelegatorRewardIndexes)
+	rewardIndexes, _ := claim.DelegatorRewardIndexes.Get(types.BondDenom)
-	suite.storeGlobalDelegatorFactor(globalIndexes)
+	globalIndexes := increaseRewardFactors(rewardIndexes)
+
+	// Update the claim object with the new global factor
+	bondIndex, _ := claim.DelegatorRewardIndexes.GetRewardIndexIndex(types.BondDenom)
+	claim.DelegatorRewardIndexes[bondIndex].RewardIndexes = globalIndexes
+	suite.storeGlobalDelegatorFactor(claim.DelegatorRewardIndexes)
 
 	suite.keeper.SynchronizeHardDelegatorRewards(suite.ctx, claim.Owner, nil, false)
 
 	syncedClaim, _ := suite.keeper.GetHardLiquidityProviderClaim(suite.ctx, claim.Owner)
-	suite.Equal(globalIndexes, syncedClaim.DelegatorRewardIndexes)
+	suite.Equal(globalIndexes, syncedClaim.DelegatorRewardIndexes[bondIndex].RewardIndexes)
 }
+
 func (suite *SynchronizeHardDelegatorRewardTests) TestRewardIsUnchangedWhenGlobalFactorUnchanged() {
 	delegator := arbitraryAddress()
 	validatorAddress := arbitraryValidatorAddress()
@@ -98,9 +104,16 @@ func (suite *SynchronizeHardDelegatorRewardTests) TestRewardIsUnchangedWhenGloba
 			Owner:  delegator,
 			Reward: arbitraryCoins(),
 		},
-		DelegatorRewardIndexes: types.RewardIndexes{{
+		DelegatorRewardIndexes: types.MultiRewardIndexes{{
 			CollateralType: types.BondDenom,
-			RewardFactor:   d("0.1"),
+			RewardIndexes: types.RewardIndexes{
+				{
+					CollateralType: "hard", RewardFactor: d("0.1"),
+				},
+				{
+					CollateralType: "swp", RewardFactor: d("0.2"),
+				},
+			},
 		}},
 	}
 	suite.storeClaim(claim)
@@ -136,13 +149,20 @@ func (suite *SynchronizeHardDelegatorRewardTests) TestRewardIsIncreasedWhenNewRe
 			Owner:  delegator,
 			Reward: arbitraryCoins(),
 		},
-		DelegatorRewardIndexes: types.RewardIndexes{},
+		DelegatorRewardIndexes: types.MultiRewardIndexes{},
 	}
 	suite.storeClaim(claim)
 
-	newGlobalIndexes := types.RewardIndexes{{
+	newGlobalIndexes := types.MultiRewardIndexes{{
 		CollateralType: types.BondDenom,
-		RewardFactor:   d("0.1"),
+		RewardIndexes: types.RewardIndexes{
+			{
+				CollateralType: "hard", RewardFactor: d("0.1"),
+			},
+			{
+				CollateralType: "swp", RewardFactor: d("0.2"),
+			},
+		},
 	}}
 	suite.storeGlobalDelegatorFactor(newGlobalIndexes)
 
@@ -152,7 +172,10 @@ func (suite *SynchronizeHardDelegatorRewardTests) TestRewardIsIncreasedWhenNewRe
 
 	suite.Equal(newGlobalIndexes, syncedClaim.DelegatorRewardIndexes)
 	suite.Equal(
-		cs(c(types.HardLiquidityRewardDenom, 100)).Add(claim.Reward...),
+		cs(
+			c(types.HardLiquidityRewardDenom, 100),
+			c("swp", 200),
+		).Add(claim.Reward...),
 		syncedClaim.Reward,
 	)
 }
@@ -179,16 +202,33 @@ func (suite *SynchronizeHardDelegatorRewardTests) TestRewardIsIncreasedWhenGloba
 			Owner:  delegator,
 			Reward: arbitraryCoins(),
 		},
-		DelegatorRewardIndexes: types.RewardIndexes{{
+		DelegatorRewardIndexes: types.MultiRewardIndexes{{
 			CollateralType: types.BondDenom,
-			RewardFactor:   d("0.1"),
+			RewardIndexes: types.RewardIndexes{
+				{
+					CollateralType: "hard", RewardFactor: d("0.1"),
+				},
+				{
+					CollateralType: "swp", RewardFactor: d("0.2"),
+				},
+			},
 		}},
 	}
 	suite.storeClaim(claim)
 
 	suite.storeGlobalDelegatorFactor(
+		types.MultiRewardIndexes{
+			types.NewMultiRewardIndex(
+				types.BondDenom,
 				types.RewardIndexes{
-			types.NewRewardIndex(types.BondDenom, d("0.2")),
+					{
+						CollateralType: "hard", RewardFactor: d("0.2"),
+					},
+					{
+						CollateralType: "swp", RewardFactor: d("0.4"),
+					},
+				},
+			),
 		},
 	)
 
@@ -197,7 +237,10 @@ func (suite *SynchronizeHardDelegatorRewardTests) TestRewardIsIncreasedWhenGloba
 	syncedClaim, _ := suite.keeper.GetHardLiquidityProviderClaim(suite.ctx, claim.Owner)
 
 	suite.Equal(
-		cs(c(types.HardLiquidityRewardDenom, 100)).Add(claim.Reward...),
+		cs(
+			c(types.HardLiquidityRewardDenom, 100),
+			c("swp", 200),
+		).Add(claim.Reward...),
 		syncedClaim.Reward,
 	)
 }

x/incentive/keeper/rewards_delegator_test.go

@@ -67,9 +67,9 @@ func (suite *DelegatorRewardsTestSuite) SetupWithGenState(authBuilder app.AuthGe
 func (suite *DelegatorRewardsTestSuite) TestAccumulateHardDelegatorRewards() {
 	type args struct {
 		delegation            sdk.Coin
-		rewardsPerSecond     sdk.Coin
+		rewardsPerSecond      sdk.Coins
 		timeElapsed           int
-		expectedRewardFactor sdk.Dec
+		expectedRewardIndexes types.RewardIndexes
 	}
 	type test struct {
 		name string
@@ -80,27 +80,45 @@ func (suite *DelegatorRewardsTestSuite) TestAccumulateHardDelegatorRewards() {
 			"7 seconds",
 			args{
 				delegation:       c("ukava", 1_000_000),
-				rewardsPerSecond:     c("hard", 122354),
+				rewardsPerSecond: cs(c("hard", 122354)),
 				timeElapsed:      7,
-				expectedRewardFactor: d("0.428239000000000000"),
+				expectedRewardIndexes: types.RewardIndexes{
+					types.NewRewardIndex("hard", d("0.428239000000000000")),
+				},
 			},
 		},
 		{
 			"1 day",
 			args{
 				delegation:       c("ukava", 1_000_000),
-				rewardsPerSecond:     c("hard", 122354),
+				rewardsPerSecond: cs(c("hard", 122354)),
 				timeElapsed:      86400,
-				expectedRewardFactor: d("5285.692800000000000000"),
+				expectedRewardIndexes: types.RewardIndexes{
+					types.NewRewardIndex("hard", d("5285.692800000000000000")),
+				},
 			},
 		},
 		{
 			"0 seconds",
 			args{
 				delegation:       c("ukava", 1_000_000),
-				rewardsPerSecond:     c("hard", 122354),
+				rewardsPerSecond: cs(c("hard", 122354)),
 				timeElapsed:      0,
-				expectedRewardFactor: d("0.0"),
+				expectedRewardIndexes: types.RewardIndexes{
+					types.NewRewardIndex("hard", d("0.0")),
+				},
+			},
+		},
+		{
+			"multiple reward coins",
+			args{
+				delegation:       c("ukava", 1_000_000),
+				rewardsPerSecond: cs(c("hard", 122354), c("swp", 567889)),
+				timeElapsed:      7,
+				expectedRewardIndexes: types.RewardIndexes{
+					types.NewRewardIndex("hard", d("0.428239000000000000")),
+					types.NewRewardIndex("swp", d("1.987611500000000000")),
+				},
 			},
 		},
 	}
@@ -127,13 +145,13 @@ func (suite *DelegatorRewardsTestSuite) TestAccumulateHardDelegatorRewards() {
 			runAtTime := suite.ctx.BlockTime().Add(time.Duration(int(time.Second) * tc.args.timeElapsed))
 			runCtx := suite.ctx.WithBlockTime(runAtTime)
 
-			rewardPeriod, found := suite.keeper.GetHardDelegatorRewardPeriod(runCtx, tc.args.delegation.Denom)
+			rewardPeriods, found := suite.keeper.GetHardDelegatorRewardPeriods(runCtx, tc.args.delegation.Denom)
 			suite.Require().True(found)
-			err = suite.keeper.AccumulateHardDelegatorRewards(runCtx, rewardPeriod)
+			err = suite.keeper.AccumulateHardDelegatorRewards(runCtx, rewardPeriods)
 			suite.Require().NoError(err)
 
-			rewardFactor, _ := suite.keeper.GetHardDelegatorRewardFactor(runCtx, tc.args.delegation.Denom)
+			rewardIndexes, _ := suite.keeper.GetHardDelegatorRewardIndexes(runCtx, tc.args.delegation.Denom)
-			suite.Require().Equal(tc.args.expectedRewardFactor, rewardFactor)
+			suite.Require().Equal(tc.args.expectedRewardIndexes, rewardIndexes)
 		})
 	}
 }
@@ -141,9 +159,9 @@ func (suite *DelegatorRewardsTestSuite) TestAccumulateHardDelegatorRewards() {
 func (suite *DelegatorRewardsTestSuite) TestSynchronizeHardDelegatorReward() {
 	type args struct {
 		delegation            sdk.Coin
-		rewardsPerSecond     sdk.Coin
+		rewardsPerSecond      sdk.Coins
 		blockTimes            []int
-		expectedRewardFactor sdk.Dec
+		expectedRewardIndexes types.RewardIndexes
 		expectedRewards       sdk.Coins
 	}
 	type test struct {
@@ -156,9 +174,11 @@ func (suite *DelegatorRewardsTestSuite) TestSynchronizeHardDelegatorReward() {
 			"10 blocks",
 			args{
 				delegation:       c("ukava", 1_000_000),
-				rewardsPerSecond:     c("hard", 122354),
+				rewardsPerSecond: cs(c("hard", 122354)),
 				blockTimes:       []int{10, 10, 10, 10, 10, 10, 10, 10, 10, 10},
-				expectedRewardFactor: d("6.117700000000000000"),
+				expectedRewardIndexes: types.RewardIndexes{
+					types.NewRewardIndex("hard", d("6.117700000000000000")),
+				},
 				expectedRewards: cs(c("hard", 6117700)),
 			},
 		},
@@ -166,9 +186,11 @@ func (suite *DelegatorRewardsTestSuite) TestSynchronizeHardDelegatorReward() {
 			"10 blocks - long block time",
 			args{
 				delegation:       c("ukava", 1_000_000),
-				rewardsPerSecond:     c("hard", 122354),
+				rewardsPerSecond: cs(c("hard", 122354)),
 				blockTimes:       []int{86400, 86400, 86400, 86400, 86400, 86400, 86400, 86400, 86400, 86400},
-				expectedRewardFactor: d("52856.928000000000000000"),
+				expectedRewardIndexes: types.RewardIndexes{
+					types.NewRewardIndex("hard", d("52856.928000000000000000")),
+				},
 				expectedRewards: cs(c("hard", 52856928000)),
 			},
 		},
@@ -176,12 +198,27 @@ func (suite *DelegatorRewardsTestSuite) TestSynchronizeHardDelegatorReward() {
 			"delegator reward index updated when reward is zero",
 			args{
 				delegation:       c("ukava", 1),
-				rewardsPerSecond:     c("hard", 1),
+				rewardsPerSecond: cs(c("hard", 1)),
 				blockTimes:       []int{10, 10, 10, 10, 10, 10, 10, 10, 10, 10},
-				expectedRewardFactor: d("0.000099999900000100"),
+				expectedRewardIndexes: types.RewardIndexes{
+					types.NewRewardIndex("hard", d("0.000099999900000100")),
+				},
 				expectedRewards: nil,
 			},
 		},
+		{
+			"multiple reward coins",
+			args{
+				delegation:       c("ukava", 1_000_000),
+				rewardsPerSecond: cs(c("hard", 122354), c("swp", 56789)),
+				blockTimes:       []int{10, 10, 10, 10, 10, 10, 10, 10, 10, 10},
+				expectedRewardIndexes: types.RewardIndexes{
+					types.NewRewardIndex("hard", d("6.117700000000000000")),
+					types.NewRewardIndex("swp", d("2.839450000000000000")),
+				},
+				expectedRewards: cs(c("hard", 6117700), c("swp", 2839450)),
+			},
+		},
 	}
 	for _, tc := range testCases {
 		suite.Run(tc.name, func() {
@@ -215,7 +252,9 @@ func (suite *DelegatorRewardsTestSuite) TestSynchronizeHardDelegatorReward() {
 			// Check that Staking hooks initialized a HardLiquidityProviderClaim
 			claim, found := suite.keeper.GetHardLiquidityProviderClaim(suite.ctx, suite.addrs[0])
 			suite.Require().True(found)
-			suite.Require().Equal(sdk.ZeroDec(), claim.DelegatorRewardIndexes[0].RewardFactor)
+			for _, rewardIndex := range claim.DelegatorRewardIndexes[0].RewardIndexes {
+				suite.Require().Equal(sdk.ZeroDec(), rewardIndex.RewardFactor)
+			}
 
 			// Run accumulator at several intervals
 			var timeElapsed int
@@ -226,10 +265,10 @@ func (suite *DelegatorRewardsTestSuite) TestSynchronizeHardDelegatorReward() {
 				previousBlockTime = updatedBlockTime
 				blockCtx := suite.ctx.WithBlockTime(updatedBlockTime)
 
-				rewardPeriod, found := suite.keeper.GetHardDelegatorRewardPeriod(blockCtx, tc.args.delegation.Denom)
+				rewardPeriods, found := suite.keeper.GetHardDelegatorRewardPeriods(blockCtx, tc.args.delegation.Denom)
 				suite.Require().True(found)
 
-				err := suite.keeper.AccumulateHardDelegatorRewards(blockCtx, rewardPeriod)
+				err := suite.keeper.AccumulateHardDelegatorRewards(blockCtx, rewardPeriods)
 				suite.Require().NoError(err)
 			}
 			updatedBlockTime := suite.ctx.BlockTime().Add(time.Duration(int(time.Second) * timeElapsed))
@@ -241,12 +280,17 @@ func (suite *DelegatorRewardsTestSuite) TestSynchronizeHardDelegatorReward() {
 			})
 
 			// Check that reward factor and claim have been updated as expected
-			rewardFactor, _ := suite.keeper.GetHardDelegatorRewardFactor(suite.ctx, tc.args.delegation.Denom)
+			rewardIndexes, _ := suite.keeper.GetHardDelegatorRewardIndexes(suite.ctx, tc.args.delegation.Denom)
-			suite.Require().Equal(tc.args.expectedRewardFactor, rewardFactor)
+			for i, rewardPerSecond := range tc.args.rewardsPerSecond {
+				rewardFactor, _ := rewardIndexes.Get(rewardPerSecond.Denom)
+				suite.Require().Equal(tc.args.expectedRewardIndexes[i].RewardFactor, rewardFactor)
+			}
 
 			claim, found = suite.keeper.GetHardLiquidityProviderClaim(suite.ctx, suite.addrs[0])
 			suite.Require().True(found)
-			suite.Require().Equal(tc.args.expectedRewardFactor, claim.DelegatorRewardIndexes[0].RewardFactor)
+			for i, delegatorRewardIndex := range claim.DelegatorRewardIndexes[0].RewardIndexes {
+				suite.Require().Equal(tc.args.expectedRewardIndexes[i].RewardFactor, delegatorRewardIndex.RewardFactor)
+			}
 			suite.Require().Equal(tc.args.expectedRewards, claim.Reward)
 		})
 	}
@@ -255,7 +299,7 @@ func (suite *DelegatorRewardsTestSuite) TestSynchronizeHardDelegatorReward() {
 func (suite *DelegatorRewardsTestSuite) TestSimulateHardDelegatorRewardSynchronization() {
 	type args struct {
 		delegation            sdk.Coin
-		rewardsPerSecond      sdk.Coin
+		rewardsPerSecond      sdk.Coins
 		blockTimes            []int
 		expectedRewardIndexes types.RewardIndexes
 		expectedRewards       sdk.Coins
@@ -270,9 +314,9 @@ func (suite *DelegatorRewardsTestSuite) TestSimulateHardDelegatorRewardSynchroni
 			"10 blocks",
 			args{
 				delegation:            c("ukava", 1_000_000),
-				rewardsPerSecond:      c("hard", 122354),
+				rewardsPerSecond:      cs(c("hard", 122354)),
 				blockTimes:            []int{10, 10, 10, 10, 10, 10, 10, 10, 10, 10},
-				expectedRewardIndexes: types.RewardIndexes{types.NewRewardIndex("ukava", d("6.117700000000000000"))}, // Here the reward index stores data differently than inside a MultiRewardIndex
+				expectedRewardIndexes: types.RewardIndexes{types.NewRewardIndex("hard", d("6.117700000000000000"))},
 				expectedRewards:       cs(c("hard", 6117700)),
 			},
 		},
@@ -280,12 +324,25 @@ func (suite *DelegatorRewardsTestSuite) TestSimulateHardDelegatorRewardSynchroni
 			"10 blocks - long block time",
 			args{
 				delegation:            c("ukava", 1_000_000),
-				rewardsPerSecond:      c("hard", 122354),
+				rewardsPerSecond:      cs(c("hard", 122354)),
 				blockTimes:            []int{86400, 86400, 86400, 86400, 86400, 86400, 86400, 86400, 86400, 86400},
-				expectedRewardIndexes: types.RewardIndexes{types.NewRewardIndex("ukava", d("52856.928000000000000000"))},
+				expectedRewardIndexes: types.RewardIndexes{types.NewRewardIndex("hard", d("52856.928000000000000000"))},
 				expectedRewards:       cs(c("hard", 52856928000)),
 			},
 		},
+		{
+			"multiple rewards coins",
+			args{
+				delegation:       c("ukava", 1_000_000),
+				rewardsPerSecond: cs(c("hard", 122354), c("swp", 56789)),
+				blockTimes:       []int{10, 10, 10, 10, 10, 10, 10, 10, 10, 10},
+				expectedRewardIndexes: types.RewardIndexes{
+					types.NewRewardIndex("hard", d("6.117700000000000000")),
+					types.NewRewardIndex("swp", d("2.839450000000000000")),
+				},
+				expectedRewards: cs(c("hard", 6117700), c("swp", 2839450)),
+			},
+		},
 	}
 
 	for _, tc := range testCases {
@@ -311,7 +368,9 @@ func (suite *DelegatorRewardsTestSuite) TestSimulateHardDelegatorRewardSynchroni
 			// Check that Staking hooks initialized a HardLiquidityProviderClaim
 			claim, found := suite.keeper.GetHardLiquidityProviderClaim(suite.ctx, suite.addrs[0])
 			suite.Require().True(found)
-			suite.Require().Equal(sdk.ZeroDec(), claim.DelegatorRewardIndexes[0].RewardFactor)
+			for _, rewardIndex := range claim.DelegatorRewardIndexes[0].RewardIndexes {
+				suite.Require().Equal(sdk.ZeroDec(), rewardIndex.RewardFactor)
+			}
 
 			// Run accumulator at several intervals
 			var timeElapsed int
@@ -323,9 +382,9 @@ func (suite *DelegatorRewardsTestSuite) TestSimulateHardDelegatorRewardSynchroni
 				blockCtx := suite.ctx.WithBlockTime(updatedBlockTime)
 
 				// Accumulate hard delegator rewards
-				rewardPeriod, found := suite.keeper.GetHardDelegatorRewardPeriod(blockCtx, tc.args.delegation.Denom)
+				rewardPeriods, found := suite.keeper.GetHardDelegatorRewardPeriods(blockCtx, tc.args.delegation.Denom)
 				suite.Require().True(found)
-				err := suite.keeper.AccumulateHardDelegatorRewards(blockCtx, rewardPeriod)
+				err := suite.keeper.AccumulateHardDelegatorRewards(blockCtx, rewardPeriods)
 				suite.Require().NoError(err)
 			}
 			updatedBlockTime := suite.ctx.BlockTime().Add(time.Duration(int(time.Second) * timeElapsed))
@@ -333,11 +392,12 @@ func (suite *DelegatorRewardsTestSuite) TestSimulateHardDelegatorRewardSynchroni
 
 			// Check that the synced claim held in memory has properly simulated syncing
 			syncedClaim := suite.keeper.SimulateHardSynchronization(suite.ctx, claim)
-			for _, expectedRewardIndex := range tc.args.expectedRewardIndexes {
+
+			for i, expectedRewardIndex := range tc.args.expectedRewardIndexes {
 				// Check that the user's claim's reward index matches the expected reward index
-				rewardIndex, found := syncedClaim.DelegatorRewardIndexes.GetRewardIndex(expectedRewardIndex.CollateralType)
+				multiRewardIndex, found := syncedClaim.DelegatorRewardIndexes.Get(types.BondDenom)
 				suite.Require().True(found)
-				suite.Require().Equal(expectedRewardIndex, rewardIndex)
+				suite.Require().Equal(expectedRewardIndex, multiRewardIndex[i])
 
 				// Check that the user's claim holds the expected amount of reward coins
 				suite.Require().Equal(
@@ -395,7 +455,7 @@ func (suite *DelegatorRewardsTestSuite) TestUnbondingValidatorSyncsClaim() {
 		WithSimpleAccount(sdk.AccAddress(suite.validatorAddrs[1]), cs(c("ukava", 1e9))).
 		WithSimpleAccount(sdk.AccAddress(suite.validatorAddrs[2]), cs(c("ukava", 1e9)))
 
-	rewardsPerSecond := c("hard", 122354)
+	rewardsPerSecond := cs(c("hard", 122354))
 	bondDenom := "ukava"
 
 	incentBuilder := NewIncentiveGenesisBuilder().
@@ -446,14 +506,16 @@ func (suite *DelegatorRewardsTestSuite) TestUnbondingValidatorSyncsClaim() {
 	claim, found := suite.keeper.GetHardLiquidityProviderClaim(suite.ctx, suite.addrs[0])
 	suite.Require().True(found)
 
-	globalIndex, found := suite.keeper.GetHardDelegatorRewardFactor(suite.ctx, bondDenom)
+	rewardIndexes, found := suite.keeper.GetHardDelegatorRewardIndexes(suite.ctx, bondDenom)
+	suite.Require().True(found)
+	globalIndex, found := rewardIndexes.Get(rewardsPerSecond[0].Denom)
 	suite.Require().True(found)
 	claimIndex, found := claim.DelegatorRewardIndexes.GetRewardIndex(bondDenom)
 	suite.Require().True(found)
-	suite.Require().Equal(globalIndex, claimIndex.RewardFactor)
+	suite.Require().Equal(globalIndex, claimIndex.RewardIndexes[0].RewardFactor)
 
 	suite.Require().Equal(
-		cs(c(rewardsPerSecond.Denom, 76471)),
+		cs(c(rewardsPerSecond[0].Denom, 76471)),
 		claim.Reward,
 	)
 
@@ -471,9 +533,11 @@ func (suite *DelegatorRewardsTestSuite) TestUnbondingValidatorSyncsClaim() {
 	// claim index has been updated to latest global value
 	laterClaimIndex, found := laterClaim.DelegatorRewardIndexes.GetRewardIndex(bondDenom)
 	suite.Require().True(found)
-	globalIndex, found = suite.keeper.GetHardDelegatorRewardFactor(suite.ctx, bondDenom)
+	rewardIndexes, found = suite.keeper.GetHardDelegatorRewardIndexes(suite.ctx, bondDenom)
 	suite.Require().True(found)
-	suite.Require().Equal(globalIndex, laterClaimIndex.RewardFactor)
+	globalIndex, found = rewardIndexes.Get(rewardsPerSecond[0].Denom)
+	suite.Require().True(found)
+	suite.Require().Equal(globalIndex, laterClaimIndex.RewardIndexes[0].RewardFactor)
 }
 
 // given a user has a delegation to an unbonded validator, when the validator becomes bonded, the user starts accumulating rewards
@@ -485,7 +549,7 @@ func (suite *DelegatorRewardsTestSuite) TestBondingValidatorSyncsClaim() {
 		WithSimpleAccount(sdk.AccAddress(suite.validatorAddrs[1]), cs(c("ukava", 1e9))).
 		WithSimpleAccount(sdk.AccAddress(suite.validatorAddrs[2]), cs(c("ukava", 1e9)))
 
-	rewardsPerSecond := c("hard", 122354)
+	rewardsPerSecond := cs(c("hard", 122354))
 	bondDenom := "ukava"
 
 	incentBuilder := NewIncentiveGenesisBuilder().
@@ -536,11 +600,13 @@ func (suite *DelegatorRewardsTestSuite) TestBondingValidatorSyncsClaim() {
 	claim, found := suite.keeper.GetHardLiquidityProviderClaim(suite.ctx, suite.addrs[0])
 	suite.Require().True(found)
 
-	globalIndex, found := suite.keeper.GetHardDelegatorRewardFactor(suite.ctx, bondDenom)
+	rewardIndexes, found := suite.keeper.GetHardDelegatorRewardIndexes(suite.ctx, bondDenom)
+	suite.Require().True(found)
+	globalIndex, found := rewardIndexes.Get(rewardsPerSecond[0].Denom)
 	suite.Require().True(found)
 	claimIndex, found := claim.DelegatorRewardIndexes.GetRewardIndex(bondDenom)
 	suite.Require().True(found)
-	suite.Require().Equal(globalIndex, claimIndex.RewardFactor)
+	suite.Require().Equal(globalIndex, claimIndex.RewardIndexes[0].RewardFactor)
 
 	suite.Require().Equal(
 		sdk.Coins(nil),
@@ -561,9 +627,11 @@ func (suite *DelegatorRewardsTestSuite) TestBondingValidatorSyncsClaim() {
 	// claim index has been updated to latest global value
 	laterClaimIndex, found := laterClaim.DelegatorRewardIndexes.GetRewardIndex(bondDenom)
 	suite.Require().True(found)
-	globalIndex, found = suite.keeper.GetHardDelegatorRewardFactor(suite.ctx, bondDenom)
+	rewardIndexes, found = suite.keeper.GetHardDelegatorRewardIndexes(suite.ctx, bondDenom)
 	suite.Require().True(found)
-	suite.Require().Equal(globalIndex, laterClaimIndex.RewardFactor)
+	globalIndex, found = rewardIndexes.Get(rewardsPerSecond[0].Denom)
+	suite.Require().True(found)
+	suite.Require().Equal(globalIndex, laterClaimIndex.RewardIndexes[0].RewardFactor)
 }
 
 // If a validator is slashed delegators should have their claims synced
@@ -573,7 +641,7 @@ func (suite *DelegatorRewardsTestSuite) TestSlashingValidatorSyncsClaim() {
 		WithSimpleAccount(sdk.AccAddress(suite.validatorAddrs[0]), cs(c("ukava", 1e9))).
 		WithSimpleAccount(sdk.AccAddress(suite.validatorAddrs[1]), cs(c("ukava", 1e9)))
 
-	rewardsPerSecond := c("hard", 122354)
+	rewardsPerSecond := cs(c("hard", 122354))
 	bondDenom := "ukava"
 
 	incentBuilder := NewIncentiveGenesisBuilder().
@@ -608,11 +676,11 @@ func (suite *DelegatorRewardsTestSuite) TestSlashingValidatorSyncsClaim() {
 	// Check that claim has been created with synced reward index but no reward coins
 	initialClaim, found := suite.keeper.GetHardLiquidityProviderClaim(suite.ctx, suite.addrs[0])
 	suite.True(found)
-	initialGlobalIndex, found := suite.keeper.GetHardDelegatorRewardFactor(suite.ctx, bondDenom)
+	initialGlobalIndex, found := suite.keeper.GetHardDelegatorRewardIndexes(suite.ctx, bondDenom)
 	suite.True(found)
 	initialClaimIndex, found := initialClaim.DelegatorRewardIndexes.GetRewardIndex(bondDenom)
 	suite.True(found)
-	suite.Require().Equal(initialGlobalIndex, initialClaimIndex.RewardFactor)
+	suite.Require().Equal(initialGlobalIndex, initialClaimIndex.RewardIndexes)
 	suite.True(initialClaim.Reward.Empty()) // Initial claim should not have any rewards
 
 	// Start a new block to accumulate some delegation rewards for the user.
@@ -631,20 +699,20 @@ func (suite *DelegatorRewardsTestSuite) TestSlashingValidatorSyncsClaim() {
 	// Check that the user's claim has been synced. ie rewards added, index updated
 	claim, found := suite.keeper.GetHardLiquidityProviderClaim(suite.ctx, suite.addrs[0])
 	suite.Require().True(found)
-	globalIndex, found := suite.keeper.GetHardDelegatorRewardFactor(suite.ctx, bondDenom)
+	globalIndex, found := suite.keeper.GetHardDelegatorRewardIndexes(suite.ctx, bondDenom)
 	suite.Require().True(found)
 	claimIndex, found := claim.DelegatorRewardIndexes.GetRewardIndex(bondDenom)
 	suite.Require().True(found)
-	suite.Require().Equal(globalIndex, claimIndex.RewardFactor)
+	suite.Require().Equal(globalIndex, claimIndex.RewardIndexes)
 
 	// Check that rewards were added
 	suite.Require().Equal(
-		cs(c(rewardsPerSecond.Denom, 58264)),
+		cs(c(rewardsPerSecond[0].Denom, 58264)),
 		claim.Reward,
 	)
 
 	// Check that reward factor increased from initial value
-	suite.True(claimIndex.RewardFactor.GT(initialClaimIndex.RewardFactor))
+	suite.True(claimIndex.RewardIndexes[0].RewardFactor.GT(initialClaimIndex.RewardIndexes[0].RewardFactor))
 }
 
 // Given a delegation to a bonded validator, when a user redelegates everything to another (bonded) validator, the user's claim is synced
@@ -654,7 +722,7 @@ func (suite *DelegatorRewardsTestSuite) TestRedelegationSyncsClaim() {
 		WithSimpleAccount(sdk.AccAddress(suite.validatorAddrs[0]), cs(c("ukava", 1e9))).
 		WithSimpleAccount(sdk.AccAddress(suite.validatorAddrs[1]), cs(c("ukava", 1e9)))
 
-	rewardsPerSecond := c("hard", 122354)
+	rewardsPerSecond := cs(c("hard", 122354))
 	bondDenom := "ukava"
 
 	incentBuilder := NewIncentiveGenesisBuilder().
@@ -689,13 +757,13 @@ func (suite *DelegatorRewardsTestSuite) TestRedelegationSyncsClaim() {
 	claim, found := suite.keeper.GetHardLiquidityProviderClaim(suite.ctx, suite.addrs[0])
 	suite.Require().True(found)
 
-	globalIndex, found := suite.keeper.GetHardDelegatorRewardFactor(suite.ctx, bondDenom)
+	globalIndex, found := suite.keeper.GetHardDelegatorRewardIndexes(suite.ctx, bondDenom)
 	suite.Require().True(found)
 	claimIndex, found := claim.DelegatorRewardIndexes.GetRewardIndex(bondDenom)
 	suite.Require().True(found)
-	suite.Require().Equal(globalIndex, claimIndex.RewardFactor)
+	suite.Require().Equal(globalIndex, claimIndex.RewardIndexes)
 	suite.Require().Equal(
-		cs(c(rewardsPerSecond.Denom, 76471)),
+		cs(c(rewardsPerSecond[0].Denom, 76471)),
 		claim.Reward,
 	)
 }

x/incentive/keeper/rewards_supply.go

@@ -300,57 +300,55 @@ func (k Keeper) SimulateHardSynchronization(ctx sdk.Context, claim types.HardLiq
 		}
 	}
 
-	// 3. Simulate Hard delegator rewards
+	// 3. Simulate delegator rewards
-	delagatorFactor, found := k.GetHardDelegatorRewardFactor(ctx, types.BondDenom)
+	for _, ri := range claim.DelegatorRewardIndexes {
-	if !found {
+		// For each Delegator reward index (there's only one: the bond denom 'ukava')
-		return claim
+		globalRewardIndexes, foundGlobalRewardIndexes := k.GetHardDelegatorRewardIndexes(ctx, ri.CollateralType)
+		if !foundGlobalRewardIndexes {
+			continue
 		}
 
-	delegatorIndex, hasDelegatorRewardIndex := claim.HasDelegatorRewardIndex(types.BondDenom)
+		userRewardIndexes, foundUserRewardIndexes := claim.DelegatorRewardIndexes.GetRewardIndex(ri.CollateralType)
-	if !hasDelegatorRewardIndex {
+		if !foundUserRewardIndexes {
-		return claim
+			continue
 		}
 
-	userRewardFactor := claim.DelegatorRewardIndexes[delegatorIndex].RewardFactor
+		userRewardIndexIndex, foundUserRewardIndexIndex := claim.DelegatorRewardIndexes.GetRewardIndexIndex(ri.CollateralType)
-	rewardsAccumulatedFactor := delagatorFactor.Sub(userRewardFactor)
+		if !foundUserRewardIndexIndex {
+			continue
+		}
+
+		amtDelegated := k.GetTotalDelegated(ctx, claim.GetOwner(), sdk.ValAddress(claim.Owner.String()), true)
+
+		for _, globalRewardIndex := range globalRewardIndexes {
+			userRewardIndex, foundUserRewardIndex := userRewardIndexes.RewardIndexes.GetRewardIndex(globalRewardIndex.CollateralType)
+			if !foundUserRewardIndex {
+				userRewardIndex = types.NewRewardIndex(globalRewardIndex.CollateralType, sdk.ZeroDec())
+				userRewardIndexes.RewardIndexes = append(userRewardIndexes.RewardIndexes, userRewardIndex)
+				claim.DelegatorRewardIndexes[userRewardIndexIndex].RewardIndexes = append(claim.DelegatorRewardIndexes[userRewardIndexIndex].RewardIndexes, userRewardIndex)
+			}
+
+			globalRewardFactor := globalRewardIndex.RewardFactor
+			userRewardFactor := userRewardIndex.RewardFactor
+			rewardsAccumulatedFactor := globalRewardFactor.Sub(userRewardFactor)
 			if rewardsAccumulatedFactor.IsZero() {
-		return claim
-	}
-	claim.DelegatorRewardIndexes[delegatorIndex].RewardFactor = delagatorFactor
-
-	totalDelegated := sdk.ZeroDec()
-
-	delegations := k.stakingKeeper.GetDelegatorDelegations(ctx, claim.GetOwner(), 200)
-	for _, delegation := range delegations {
-		validator, found := k.stakingKeeper.GetValidator(ctx, delegation.GetValidatorAddr())
-		if !found {
 				continue
 			}
 
-		// Delegators don't accumulate rewards if their validator is unbonded/slashed
+			rewardsEarned := rewardsAccumulatedFactor.Mul(amtDelegated).RoundInt()
-		if validator.GetStatus() != sdk.Bonded {
-			continue
-		}
-
-		if validator.GetTokens().IsZero() {
-			continue
-		}
-
-		delegatedTokens := validator.TokensFromShares(delegation.GetShares())
-		if delegatedTokens.IsZero() || delegatedTokens.IsNegative() {
-			continue
-		}
-		totalDelegated = totalDelegated.Add(delegatedTokens)
-	}
-
-	rewardsEarned := rewardsAccumulatedFactor.Mul(totalDelegated).RoundInt()
 			if rewardsEarned.IsZero() || rewardsEarned.IsNegative() {
-		return claim
+				continue
 			}
 
-	// Add rewards to delegator's hard claim
+			factorIndex, foundFactorIndex := userRewardIndexes.RewardIndexes.GetFactorIndex(globalRewardIndex.CollateralType)
-	newRewardsCoin := sdk.NewCoin(types.HardLiquidityRewardDenom, rewardsEarned)
+			if !foundFactorIndex {
+				continue
+			}
+			claim.DelegatorRewardIndexes[userRewardIndexIndex].RewardIndexes[factorIndex].RewardFactor = globalRewardIndex.RewardFactor
+			newRewardsCoin := sdk.NewCoin(userRewardIndex.CollateralType, rewardsEarned)
 			claim.Reward = claim.Reward.Add(newRewardsCoin)
+		}
+	}
 
 	return claim
 }

x/incentive/legacy/v0_14/types.go

@@ -0,0 +1,965 @@
+package v0_14
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/x/params"
+
+	tmtime "github.com/tendermint/tendermint/types/time"
+
+	cdptypes "github.com/kava-labs/kava/x/cdp/types"
+	kavadistTypes "github.com/kava-labs/kava/x/kavadist/types"
+)
+
+// Valid reward multipliers
+const (
+	Small                          MultiplierName = "small"
+	Medium                         MultiplierName = "medium"
+	Large                          MultiplierName = "large"
+	USDXMintingClaimType                          = "usdx_minting"
+	HardLiquidityProviderClaimType                = "hard_liquidity_provider"
+	BondDenom                                     = "ukava"
+	ModuleName                                    = "incentive"
+)
+
+// Parameter keys and default values
+var (
+	KeyUSDXMintingRewardPeriods     = []byte("USDXMintingRewardPeriods")
+	KeyHardSupplyRewardPeriods      = []byte("HardSupplyRewardPeriods")
+	KeyHardBorrowRewardPeriods      = []byte("HardBorrowRewardPeriods")
+	KeyHardDelegatorRewardPeriods   = []byte("HardDelegatorRewardPeriods")
+	KeyClaimEnd                     = []byte("ClaimEnd")
+	KeyMultipliers                  = []byte("ClaimMultipliers")
+	DefaultActive                   = false
+	DefaultRewardPeriods            = RewardPeriods{}
+	DefaultMultiRewardPeriods       = MultiRewardPeriods{}
+	DefaultMultipliers              = Multipliers{}
+	DefaultUSDXClaims               = USDXMintingClaims{}
+	DefaultHardClaims               = HardLiquidityProviderClaims{}
+	DefaultGenesisAccumulationTimes = GenesisAccumulationTimes{}
+	DefaultClaimEnd                 = tmtime.Canonical(time.Unix(1, 0))
+	GovDenom                        = cdptypes.DefaultGovDenom
+	PrincipalDenom                  = "usdx"
+	IncentiveMacc                   = kavadistTypes.ModuleName
+)
+
+// GenesisState is the state that must be provided at genesis.
+type GenesisState struct {
+	Params                         Params                      `json:"params" yaml:"params"`
+	USDXAccumulationTimes          GenesisAccumulationTimes    `json:"usdx_accumulation_times" yaml:"usdx_accumulation_times"`
+	HardSupplyAccumulationTimes    GenesisAccumulationTimes    `json:"hard_supply_accumulation_times" yaml:"hard_supply_accumulation_times"`
+	HardBorrowAccumulationTimes    GenesisAccumulationTimes    `json:"hard_borrow_accumulation_times" yaml:"hard_borrow_accumulation_times"`
+	HardDelegatorAccumulationTimes GenesisAccumulationTimes    `json:"hard_delegator_accumulation_times" yaml:"hard_delegator_accumulation_times"`
+	USDXMintingClaims              USDXMintingClaims           `json:"usdx_minting_claims" yaml:"usdx_minting_claims"`
+	HardLiquidityProviderClaims    HardLiquidityProviderClaims `json:"hard_liquidity_provider_claims" yaml:"hard_liquidity_provider_claims"`
+}
+
+// NewGenesisState returns a new genesis state
+func NewGenesisState(params Params, usdxAccumTimes, hardSupplyAccumTimes, hardBorrowAccumTimes, hardDelegatorAccumTimes GenesisAccumulationTimes, c USDXMintingClaims, hc HardLiquidityProviderClaims) GenesisState {
+	return GenesisState{
+		Params:                         params,
+		USDXAccumulationTimes:          usdxAccumTimes,
+		HardSupplyAccumulationTimes:    hardSupplyAccumTimes,
+		HardBorrowAccumulationTimes:    hardBorrowAccumTimes,
+		HardDelegatorAccumulationTimes: hardDelegatorAccumTimes,
+		USDXMintingClaims:              c,
+		HardLiquidityProviderClaims:    hc,
+	}
+}
+
+// DefaultGenesisState returns a default genesis state
+func DefaultGenesisState() GenesisState {
+	return GenesisState{
+		Params:                         DefaultParams(),
+		USDXAccumulationTimes:          GenesisAccumulationTimes{},
+		HardSupplyAccumulationTimes:    GenesisAccumulationTimes{},
+		HardBorrowAccumulationTimes:    GenesisAccumulationTimes{},
+		HardDelegatorAccumulationTimes: GenesisAccumulationTimes{},
+		USDXMintingClaims:              DefaultUSDXClaims,
+		HardLiquidityProviderClaims:    DefaultHardClaims,
+	}
+}
+
+// Validate performs basic validation of genesis data returning an
+// error for any failed validation criteria.
+func (gs GenesisState) Validate() error {
+	if err := gs.Params.Validate(); err != nil {
+		return err
+	}
+	if err := gs.USDXAccumulationTimes.Validate(); err != nil {
+		return err
+	}
+	if err := gs.HardSupplyAccumulationTimes.Validate(); err != nil {
+		return err
+	}
+	if err := gs.HardBorrowAccumulationTimes.Validate(); err != nil {
+		return err
+	}
+	if err := gs.HardDelegatorAccumulationTimes.Validate(); err != nil {
+		return err
+	}
+
+	if err := gs.HardLiquidityProviderClaims.Validate(); err != nil {
+		return err
+	}
+	return gs.USDXMintingClaims.Validate()
+}
+
+// GenesisAccumulationTime stores the previous reward distribution time and its corresponding collateral type
+type GenesisAccumulationTime struct {
+	CollateralType           string    `json:"collateral_type" yaml:"collateral_type"`
+	PreviousAccumulationTime time.Time `json:"previous_accumulation_time" yaml:"previous_accumulation_time"`
+}
+
+// NewGenesisAccumulationTime returns a new GenesisAccumulationTime
+func NewGenesisAccumulationTime(ctype string, prevTime time.Time) GenesisAccumulationTime {
+	return GenesisAccumulationTime{
+		CollateralType:           ctype,
+		PreviousAccumulationTime: prevTime,
+	}
+}
+
+// GenesisAccumulationTimes slice of GenesisAccumulationTime
+type GenesisAccumulationTimes []GenesisAccumulationTime
+
+// Validate performs validation of GenesisAccumulationTimes
+func (gats GenesisAccumulationTimes) Validate() error {
+	for _, gat := range gats {
+		if err := gat.Validate(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Validate performs validation of GenesisAccumulationTime
+func (gat GenesisAccumulationTime) Validate() error {
+	if len(gat.CollateralType) == 0 {
+		return fmt.Errorf("genesis accumulation time's collateral type must be defined")
+	}
+	return nil
+}
+
+// Params governance parameters for the incentive module
+type Params struct {
+	USDXMintingRewardPeriods   RewardPeriods      `json:"usdx_minting_reward_periods" yaml:"usdx_minting_reward_periods"`
+	HardSupplyRewardPeriods    MultiRewardPeriods `json:"hard_supply_reward_periods" yaml:"hard_supply_reward_periods"`
+	HardBorrowRewardPeriods    MultiRewardPeriods `json:"hard_borrow_reward_periods" yaml:"hard_borrow_reward_periods"`
+	HardDelegatorRewardPeriods RewardPeriods      `json:"hard_delegator_reward_periods" yaml:"hard_delegator_reward_periods"`
+	ClaimMultipliers           Multipliers        `json:"claim_multipliers" yaml:"claim_multipliers"`
+	ClaimEnd                   time.Time          `json:"claim_end" yaml:"claim_end"`
+}
+
+// NewParams returns a new params object
+func NewParams(usdxMinting RewardPeriods, hardSupply, hardBorrow MultiRewardPeriods,
+	hardDelegator RewardPeriods, multipliers Multipliers, claimEnd time.Time) Params {
+	return Params{
+		USDXMintingRewardPeriods:   usdxMinting,
+		HardSupplyRewardPeriods:    hardSupply,
+		HardBorrowRewardPeriods:    hardBorrow,
+		HardDelegatorRewardPeriods: hardDelegator,
+		ClaimMultipliers:           multipliers,
+		ClaimEnd:                   claimEnd,
+	}
+}
+
+// DefaultParams returns default params for incentive module
+func DefaultParams() Params {
+	return NewParams(DefaultRewardPeriods, DefaultMultiRewardPeriods,
+		DefaultMultiRewardPeriods, DefaultRewardPeriods, DefaultMultipliers, DefaultClaimEnd)
+}
+
+// String implements fmt.Stringer
+func (p Params) String() string {
+	return fmt.Sprintf(`Params:
+	USDX Minting Reward Periods: %s
+	Hard Supply Reward Periods: %s
+	Hard Borrow Reward Periods: %s
+	Hard Delegator Reward Periods: %s
+	Claim Multipliers :%s
+	Claim End Time: %s
+	`, p.USDXMintingRewardPeriods, p.HardSupplyRewardPeriods, p.HardBorrowRewardPeriods,
+		p.HardDelegatorRewardPeriods, p.ClaimMultipliers, p.ClaimEnd)
+}
+
+// ParamKeyTable Key declaration for parameters
+func ParamKeyTable() params.KeyTable {
+	return params.NewKeyTable().RegisterParamSet(&Params{})
+}
+
+// ParamSetPairs implements the ParamSet interface and returns all the key/value pairs
+func (p *Params) ParamSetPairs() params.ParamSetPairs {
+	return params.ParamSetPairs{
+		params.NewParamSetPair(KeyUSDXMintingRewardPeriods, &p.USDXMintingRewardPeriods, validateRewardPeriodsParam),
+		params.NewParamSetPair(KeyHardSupplyRewardPeriods, &p.HardSupplyRewardPeriods, validateMultiRewardPeriodsParam),
+		params.NewParamSetPair(KeyHardBorrowRewardPeriods, &p.HardBorrowRewardPeriods, validateMultiRewardPeriodsParam),
+		params.NewParamSetPair(KeyHardDelegatorRewardPeriods, &p.HardDelegatorRewardPeriods, validateRewardPeriodsParam),
+		params.NewParamSetPair(KeyClaimEnd, &p.ClaimEnd, validateClaimEndParam),
+		params.NewParamSetPair(KeyMultipliers, &p.ClaimMultipliers, validateMultipliersParam),
+	}
+}
+
+// Validate checks that the parameters have valid values.
+func (p Params) Validate() error {
+
+	if err := validateMultipliersParam(p.ClaimMultipliers); err != nil {
+		return err
+	}
+
+	if err := validateRewardPeriodsParam(p.USDXMintingRewardPeriods); err != nil {
+		return err
+	}
+
+	if err := validateMultiRewardPeriodsParam(p.HardSupplyRewardPeriods); err != nil {
+		return err
+	}
+
+	if err := validateMultiRewardPeriodsParam(p.HardBorrowRewardPeriods); err != nil {
+		return err
+	}
+
+	return validateRewardPeriodsParam(p.HardDelegatorRewardPeriods)
+}
+
+func validateRewardPeriodsParam(i interface{}) error {
+	rewards, ok := i.(RewardPeriods)
+	if !ok {
+		return fmt.Errorf("invalid parameter type: %T", i)
+	}
+
+	return rewards.Validate()
+}
+
+func validateMultiRewardPeriodsParam(i interface{}) error {
+	rewards, ok := i.(MultiRewardPeriods)
+	if !ok {
+		return fmt.Errorf("invalid parameter type: %T", i)
+	}
+
+	return rewards.Validate()
+}
+
+func validateMultipliersParam(i interface{}) error {
+	multipliers, ok := i.(Multipliers)
+	if !ok {
+		return fmt.Errorf("invalid parameter type: %T", i)
+	}
+	return multipliers.Validate()
+}
+
+func validateClaimEndParam(i interface{}) error {
+	endTime, ok := i.(time.Time)
+	if !ok {
+		return fmt.Errorf("invalid parameter type: %T", i)
+	}
+	if endTime.Unix() <= 0 {
+		return fmt.Errorf("end time should not be zero")
+	}
+	return nil
+}
+
+// RewardPeriod stores the state of an ongoing reward
+type RewardPeriod struct {
+	Active           bool      `json:"active" yaml:"active"`
+	CollateralType   string    `json:"collateral_type" yaml:"collateral_type"`
+	Start            time.Time `json:"start" yaml:"start"`
+	End              time.Time `json:"end" yaml:"end"`
+	RewardsPerSecond sdk.Coin  `json:"rewards_per_second" yaml:"rewards_per_second"` // per second reward payouts
+}
+
+// String implements fmt.Stringer
+func (rp RewardPeriod) String() string {
+	return fmt.Sprintf(`Reward Period:
+	Collateral Type: %s,
+	Start: %s,
+	End: %s,
+	Rewards Per Second: %s,
+	Active %t,
+	`, rp.CollateralType, rp.Start, rp.End, rp.RewardsPerSecond, rp.Active)
+}
+
+// NewRewardPeriod returns a new RewardPeriod
+func NewRewardPeriod(active bool, collateralType string, start time.Time, end time.Time, reward sdk.Coin) RewardPeriod {
+	return RewardPeriod{
+		Active:           active,
+		CollateralType:   collateralType,
+		Start:            start,
+		End:              end,
+		RewardsPerSecond: reward,
+	}
+}
+
+// Validate performs a basic check of a RewardPeriod fields.
+func (rp RewardPeriod) Validate() error {
+	if rp.Start.Unix() <= 0 {
+		return errors.New("reward period start time cannot be 0")
+	}
+	if rp.End.Unix() <= 0 {
+		return errors.New("reward period end time cannot be 0")
+	}
+	if rp.Start.After(rp.End) {
+		return fmt.Errorf("end period time %s cannot be before start time %s", rp.End, rp.Start)
+	}
+	if !rp.RewardsPerSecond.IsValid() {
+		return fmt.Errorf("invalid reward amount: %s", rp.RewardsPerSecond)
+	}
+	if strings.TrimSpace(rp.CollateralType) == "" {
+		return fmt.Errorf("reward period collateral type cannot be blank: %s", rp)
+	}
+	return nil
+}
+
+// RewardPeriods array of RewardPeriod
+type RewardPeriods []RewardPeriod
+
+// Validate checks if all the RewardPeriods are valid and there are no duplicated
+// entries.
+func (rps RewardPeriods) Validate() error {
+	seenPeriods := make(map[string]bool)
+	for _, rp := range rps {
+		if seenPeriods[rp.CollateralType] {
+			return fmt.Errorf("duplicated reward period with collateral type %s", rp.CollateralType)
+		}
+
+		if err := rp.Validate(); err != nil {
+			return err
+		}
+		seenPeriods[rp.CollateralType] = true
+	}
+
+	return nil
+}
+
+// Multiplier amount the claim rewards get increased by, along with how long the claim rewards are locked
+type Multiplier struct {
+	Name         MultiplierName `json:"name" yaml:"name"`
+	MonthsLockup int64          `json:"months_lockup" yaml:"months_lockup"`
+	Factor       sdk.Dec        `json:"factor" yaml:"factor"`
+}
+
+// NewMultiplier returns a new Multiplier
+func NewMultiplier(name MultiplierName, lockup int64, factor sdk.Dec) Multiplier {
+	return Multiplier{
+		Name:         name,
+		MonthsLockup: lockup,
+		Factor:       factor,
+	}
+}
+
+// Validate multiplier param
+func (m Multiplier) Validate() error {
+	if err := m.Name.IsValid(); err != nil {
+		return err
+	}
+	if m.MonthsLockup < 0 {
+		return fmt.Errorf("expected non-negative lockup, got %d", m.MonthsLockup)
+	}
+	if m.Factor.IsNegative() {
+		return fmt.Errorf("expected non-negative factor, got %s", m.Factor.String())
+	}
+
+	return nil
+}
+
+// String implements fmt.Stringer
+func (m Multiplier) String() string {
+	return fmt.Sprintf(`Claim Multiplier:
+	Name: %s
+	Months Lockup %d
+	Factor %s
+	`, m.Name, m.MonthsLockup, m.Factor)
+}
+
+// Multipliers slice of Multiplier
+type Multipliers []Multiplier
+
+// Validate validates each multiplier
+func (ms Multipliers) Validate() error {
+	for _, m := range ms {
+		if err := m.Validate(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// String implements fmt.Stringer
+func (ms Multipliers) String() string {
+	out := "Claim Multipliers\n"
+	for _, s := range ms {
+		out += fmt.Sprintf("%s\n", s)
+	}
+	return out
+}
+
+// MultiplierName name for valid multiplier
+type MultiplierName string
+
+// IsValid checks if the input is one of the expected strings
+func (mn MultiplierName) IsValid() error {
+	switch mn {
+	case Small, Medium, Large:
+		return nil
+	}
+	return fmt.Errorf("invalid multiplier name: %s", mn)
+}
+
+// Claim is an interface for handling common claim actions
+type Claim interface {
+	GetOwner() sdk.AccAddress
+	GetReward() sdk.Coin
+	GetType() string
+}
+
+// Claims is a slice of Claim
+type Claims []Claim
+
+// BaseClaim is a common type shared by all Claims
+type BaseClaim struct {
+	Owner  sdk.AccAddress `json:"owner" yaml:"owner"`
+	Reward sdk.Coin       `json:"reward" yaml:"reward"`
+}
+
+// GetOwner is a getter for Claim Owner
+func (c BaseClaim) GetOwner() sdk.AccAddress { return c.Owner }
+
+// GetReward is a getter for Claim Reward
+func (c BaseClaim) GetReward() sdk.Coin { return c.Reward }
+
+// GetType returns the claim type, used to identify auctions in event attributes
+func (c BaseClaim) GetType() string { return "base" }
+
+// Validate performs a basic check of a BaseClaim fields
+func (c BaseClaim) Validate() error {
+	if c.Owner.Empty() {
+		return errors.New("claim owner cannot be empty")
+	}
+	if !c.Reward.IsValid() {
+		return fmt.Errorf("invalid reward amount: %s", c.Reward)
+	}
+	return nil
+}
+
+// String implements fmt.Stringer
+func (c BaseClaim) String() string {
+	return fmt.Sprintf(`Claim:
+	Owner: %s,
+	Reward: %s,
+	`, c.Owner, c.Reward)
+}
+
+// BaseMultiClaim is a common type shared by all Claims with multiple reward denoms
+type BaseMultiClaim struct {
+	Owner  sdk.AccAddress `json:"owner" yaml:"owner"`
+	Reward sdk.Coins      `json:"reward" yaml:"reward"`
+}
+
+// GetOwner is a getter for Claim Owner
+func (c BaseMultiClaim) GetOwner() sdk.AccAddress { return c.Owner }
+
+// GetReward is a getter for Claim Reward
+func (c BaseMultiClaim) GetReward() sdk.Coins { return c.Reward }
+
+// GetType returns the claim type, used to identify auctions in event attributes
+func (c BaseMultiClaim) GetType() string { return "base" }
+
+// Validate performs a basic check of a BaseClaim fields
+func (c BaseMultiClaim) Validate() error {
+	if c.Owner.Empty() {
+		return errors.New("claim owner cannot be empty")
+	}
+	if !c.Reward.IsValid() {
+		return fmt.Errorf("invalid reward amount: %s", c.Reward)
+	}
+	return nil
+}
+
+// String implements fmt.Stringer
+func (c BaseMultiClaim) String() string {
+	return fmt.Sprintf(`Claim:
+	Owner: %s,
+	Reward: %s,
+	`, c.Owner, c.Reward)
+}
+
+// -------------- Custom Claim Types --------------
+
+// USDXMintingClaim is for USDX minting rewards
+type USDXMintingClaim struct {
+	BaseClaim     `json:"base_claim" yaml:"base_claim"`
+	RewardIndexes RewardIndexes `json:"reward_indexes" yaml:"reward_indexes"`
+}
+
+// NewUSDXMintingClaim returns a new USDXMintingClaim
+func NewUSDXMintingClaim(owner sdk.AccAddress, reward sdk.Coin, rewardIndexes RewardIndexes) USDXMintingClaim {
+	return USDXMintingClaim{
+		BaseClaim: BaseClaim{
+			Owner:  owner,
+			Reward: reward,
+		},
+		RewardIndexes: rewardIndexes,
+	}
+}
+
+// GetType returns the claim's type
+func (c USDXMintingClaim) GetType() string { return USDXMintingClaimType }
+
+// GetReward returns the claim's reward coin
+func (c USDXMintingClaim) GetReward() sdk.Coin { return c.Reward }
+
+// GetOwner returns the claim's owner
+func (c USDXMintingClaim) GetOwner() sdk.AccAddress { return c.Owner }
+
+// Validate performs a basic check of a Claim fields
+func (c USDXMintingClaim) Validate() error {
+	if err := c.RewardIndexes.Validate(); err != nil {
+		return err
+	}
+
+	return c.BaseClaim.Validate()
+}
+
+// String implements fmt.Stringer
+func (c USDXMintingClaim) String() string {
+	return fmt.Sprintf(`%s
+	Reward Indexes: %s,
+	`, c.BaseClaim, c.RewardIndexes)
+}
+
+// HasRewardIndex check if a claim has a reward index for the input collateral type
+func (c USDXMintingClaim) HasRewardIndex(collateralType string) (int64, bool) {
+	for index, ri := range c.RewardIndexes {
+		if ri.CollateralType == collateralType {
+			return int64(index), true
+		}
+	}
+	return 0, false
+}
+
+// USDXMintingClaims slice of USDXMintingClaim
+type USDXMintingClaims []USDXMintingClaim
+
+// Validate checks if all the claims are valid and there are no duplicated
+// entries.
+func (cs USDXMintingClaims) Validate() error {
+	for _, c := range cs {
+		if err := c.Validate(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// HardLiquidityProviderClaim stores the hard liquidity provider rewards that can be claimed by owner
+type HardLiquidityProviderClaim struct {
+	BaseMultiClaim         `json:"base_claim" yaml:"base_claim"`
+	SupplyRewardIndexes    MultiRewardIndexes `json:"supply_reward_indexes" yaml:"supply_reward_indexes"`
+	BorrowRewardIndexes    MultiRewardIndexes `json:"borrow_reward_indexes" yaml:"borrow_reward_indexes"`
+	DelegatorRewardIndexes RewardIndexes      `json:"delegator_reward_indexes" yaml:"delegator_reward_indexes"`
+}
+
+// NewHardLiquidityProviderClaim returns a new HardLiquidityProviderClaim
+func NewHardLiquidityProviderClaim(owner sdk.AccAddress, rewards sdk.Coins, supplyRewardIndexes,
+	borrowRewardIndexes MultiRewardIndexes, delegatorRewardIndexes RewardIndexes) HardLiquidityProviderClaim {
+	return HardLiquidityProviderClaim{
+		BaseMultiClaim: BaseMultiClaim{
+			Owner:  owner,
+			Reward: rewards,
+		},
+		SupplyRewardIndexes:    supplyRewardIndexes,
+		BorrowRewardIndexes:    borrowRewardIndexes,
+		DelegatorRewardIndexes: delegatorRewardIndexes,
+	}
+}
+
+// GetType returns the claim's type
+func (c HardLiquidityProviderClaim) GetType() string { return HardLiquidityProviderClaimType }
+
+// GetReward returns the claim's reward coin
+func (c HardLiquidityProviderClaim) GetReward() sdk.Coins { return c.Reward }
+
+// GetOwner returns the claim's owner
+func (c HardLiquidityProviderClaim) GetOwner() sdk.AccAddress { return c.Owner }
+
+// Validate performs a basic check of a HardLiquidityProviderClaim fields
+func (c HardLiquidityProviderClaim) Validate() error {
+	if err := c.SupplyRewardIndexes.Validate(); err != nil {
+		return err
+	}
+
+	if err := c.BorrowRewardIndexes.Validate(); err != nil {
+		return err
+	}
+
+	if err := c.DelegatorRewardIndexes.Validate(); err != nil {
+		return err
+	}
+
+	return c.BaseMultiClaim.Validate()
+}
+
+// String implements fmt.Stringer
+func (c HardLiquidityProviderClaim) String() string {
+	return fmt.Sprintf(`%s
+	Supply Reward Indexes: %s,
+	Borrow Reward Indexes: %s,
+	Delegator Reward Indexes: %s,
+	`, c.BaseMultiClaim, c.SupplyRewardIndexes, c.BorrowRewardIndexes, c.DelegatorRewardIndexes)
+}
+
+// HasSupplyRewardIndex check if a claim has a supply reward index for the input collateral type
+func (c HardLiquidityProviderClaim) HasSupplyRewardIndex(denom string) (int64, bool) {
+	for index, ri := range c.SupplyRewardIndexes {
+		if ri.CollateralType == denom {
+			return int64(index), true
+		}
+	}
+	return 0, false
+}
+
+// HasBorrowRewardIndex check if a claim has a borrow reward index for the input collateral type
+func (c HardLiquidityProviderClaim) HasBorrowRewardIndex(denom string) (int64, bool) {
+	for index, ri := range c.BorrowRewardIndexes {
+		if ri.CollateralType == denom {
+			return int64(index), true
+		}
+	}
+	return 0, false
+}
+
+// HasDelegatorRewardIndex check if a claim has a delegator reward index for the input collateral type
+func (c HardLiquidityProviderClaim) HasDelegatorRewardIndex(collateralType string) (int64, bool) {
+	for index, ri := range c.DelegatorRewardIndexes {
+		if ri.CollateralType == collateralType {
+			return int64(index), true
+		}
+	}
+	return 0, false
+}
+
+// HardLiquidityProviderClaims slice of HardLiquidityProviderClaim
+type HardLiquidityProviderClaims []HardLiquidityProviderClaim
+
+// Validate checks if all the claims are valid and there are no duplicated
+// entries.
+func (cs HardLiquidityProviderClaims) Validate() error {
+	for _, c := range cs {
+		if err := c.Validate(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// ---------------------- Reward periods are used by the params ----------------------
+
+// MultiRewardPeriod supports multiple reward types
+type MultiRewardPeriod struct {
+	Active           bool      `json:"active" yaml:"active"`
+	CollateralType   string    `json:"collateral_type" yaml:"collateral_type"`
+	Start            time.Time `json:"start" yaml:"start"`
+	End              time.Time `json:"end" yaml:"end"`
+	RewardsPerSecond sdk.Coins `json:"rewards_per_second" yaml:"rewards_per_second"` // per second reward payouts
+}
+
+// String implements fmt.Stringer
+func (mrp MultiRewardPeriod) String() string {
+	return fmt.Sprintf(`Reward Period:
+	Collateral Type: %s,
+	Start: %s,
+	End: %s,
+	Rewards Per Second: %s,
+	Active %t,
+	`, mrp.CollateralType, mrp.Start, mrp.End, mrp.RewardsPerSecond, mrp.Active)
+}
+
+// NewMultiRewardPeriod returns a new MultiRewardPeriod
+func NewMultiRewardPeriod(active bool, collateralType string, start time.Time, end time.Time, reward sdk.Coins) MultiRewardPeriod {
+	return MultiRewardPeriod{
+		Active:           active,
+		CollateralType:   collateralType,
+		Start:            start,
+		End:              end,
+		RewardsPerSecond: reward,
+	}
+}
+
+// Validate performs a basic check of a MultiRewardPeriod.
+func (mrp MultiRewardPeriod) Validate() error {
+	if mrp.Start.IsZero() {
+		return errors.New("reward period start time cannot be 0")
+	}
+	if mrp.End.IsZero() {
+		return errors.New("reward period end time cannot be 0")
+	}
+	if mrp.Start.After(mrp.End) {
+		return fmt.Errorf("end period time %s cannot be before start time %s", mrp.End, mrp.Start)
+	}
+	if !mrp.RewardsPerSecond.IsValid() {
+		return fmt.Errorf("invalid reward amount: %s", mrp.RewardsPerSecond)
+	}
+	if strings.TrimSpace(mrp.CollateralType) == "" {
+		return fmt.Errorf("reward period collateral type cannot be blank: %s", mrp)
+	}
+	return nil
+}
+
+// MultiRewardPeriods array of MultiRewardPeriod
+type MultiRewardPeriods []MultiRewardPeriod
+
+// GetMultiRewardPeriod fetches a MultiRewardPeriod from an array of MultiRewardPeriods by its denom
+func (mrps MultiRewardPeriods) GetMultiRewardPeriod(denom string) (MultiRewardPeriod, bool) {
+	for _, rp := range mrps {
+		if rp.CollateralType == denom {
+			return rp, true
+		}
+	}
+	return MultiRewardPeriod{}, false
+}
+
+// GetMultiRewardPeriodIndex returns the index of a MultiRewardPeriod inside array MultiRewardPeriods
+func (mrps MultiRewardPeriods) GetMultiRewardPeriodIndex(denom string) (int, bool) {
+	for i, rp := range mrps {
+		if rp.CollateralType == denom {
+			return i, true
+		}
+	}
+	return -1, false
+}
+
+// Validate checks if all the RewardPeriods are valid and there are no duplicated
+// entries.
+func (mrps MultiRewardPeriods) Validate() error {
+	seenPeriods := make(map[string]bool)
+	for _, rp := range mrps {
+		if seenPeriods[rp.CollateralType] {
+			return fmt.Errorf("duplicated reward period with collateral type %s", rp.CollateralType)
+		}
+
+		if err := rp.Validate(); err != nil {
+			return err
+		}
+		seenPeriods[rp.CollateralType] = true
+	}
+
+	return nil
+}
+
+// ---------------------- Reward indexes are used internally in the store ----------------------
+
+// RewardIndex stores reward accumulation information
+type RewardIndex struct {
+	CollateralType string  `json:"collateral_type" yaml:"collateral_type"`
+	RewardFactor   sdk.Dec `json:"reward_factor" yaml:"reward_factor"`
+}
+
+// NewRewardIndex returns a new RewardIndex
+func NewRewardIndex(collateralType string, factor sdk.Dec) RewardIndex {
+	return RewardIndex{
+		CollateralType: collateralType,
+		RewardFactor:   factor,
+	}
+}
+
+func (ri RewardIndex) String() string {
+	return fmt.Sprintf(`Collateral Type: %s, RewardFactor: %s`, ri.CollateralType, ri.RewardFactor)
+}
+
+// Validate validates reward index
+func (ri RewardIndex) Validate() error {
+	if ri.RewardFactor.IsNegative() {
+		return fmt.Errorf("reward factor value should be positive, is %s for %s", ri.RewardFactor, ri.CollateralType)
+	}
+	if strings.TrimSpace(ri.CollateralType) == "" {
+		return fmt.Errorf("collateral type should not be empty")
+	}
+	return nil
+}
+
+// RewardIndexes slice of RewardIndex
+type RewardIndexes []RewardIndex
+
+// GetRewardIndex fetches a RewardIndex by its denom
+func (ris RewardIndexes) GetRewardIndex(denom string) (RewardIndex, bool) {
+	for _, ri := range ris {
+		if ri.CollateralType == denom {
+			return ri, true
+		}
+	}
+	return RewardIndex{}, false
+}
+
+// Get fetches a RewardFactor by it's denom
+func (ris RewardIndexes) Get(denom string) (sdk.Dec, bool) {
+	for _, ri := range ris {
+		if ri.CollateralType == denom {
+			return ri.RewardFactor, true
+		}
+	}
+	return sdk.Dec{}, false
+}
+
+// With returns a copy of the indexes with a new reward factor added
+func (ris RewardIndexes) With(denom string, factor sdk.Dec) RewardIndexes {
+	newIndexes := make(RewardIndexes, len(ris))
+	copy(newIndexes, ris)
+
+	for i, ri := range newIndexes {
+		if ri.CollateralType == denom {
+			newIndexes[i].RewardFactor = factor
+			return newIndexes
+		}
+	}
+	return append(newIndexes, NewRewardIndex(denom, factor))
+}
+
+// GetFactorIndex gets the index of a specific reward index inside the array by its index
+func (ris RewardIndexes) GetFactorIndex(denom string) (int, bool) {
+	for i, ri := range ris {
+		if ri.CollateralType == denom {
+			return i, true
+		}
+	}
+	return -1, false
+}
+
+// Validate validation for reward indexes
+func (ris RewardIndexes) Validate() error {
+	for _, ri := range ris {
+		if err := ri.Validate(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// MultiRewardIndex stores reward accumulation information on multiple reward types
+type MultiRewardIndex struct {
+	CollateralType string        `json:"collateral_type" yaml:"collateral_type"`
+	RewardIndexes  RewardIndexes `json:"reward_indexes" yaml:"reward_indexes"`
+}
+
+// NewMultiRewardIndex returns a new MultiRewardIndex
+func NewMultiRewardIndex(collateralType string, indexes RewardIndexes) MultiRewardIndex {
+	return MultiRewardIndex{
+		CollateralType: collateralType,
+		RewardIndexes:  indexes,
+	}
+}
+
+// GetFactorIndex gets the index of a specific reward index inside the array by its index
+func (mri MultiRewardIndex) GetFactorIndex(denom string) (int, bool) {
+	for i, ri := range mri.RewardIndexes {
+		if ri.CollateralType == denom {
+			return i, true
+		}
+	}
+	return -1, false
+}
+
+func (mri MultiRewardIndex) String() string {
+	return fmt.Sprintf(`Collateral Type: %s, Reward Indexes: %s`, mri.CollateralType, mri.RewardIndexes)
+}
+
+// Validate validates multi-reward index
+func (mri MultiRewardIndex) Validate() error {
+	for _, rf := range mri.RewardIndexes {
+		if rf.RewardFactor.IsNegative() {
+			return fmt.Errorf("reward index's factor value cannot be negative: %s", rf)
+		}
+	}
+	if strings.TrimSpace(mri.CollateralType) == "" {
+		return fmt.Errorf("collateral type should not be empty")
+	}
+	return nil
+}
+
+// MultiRewardIndexes slice of MultiRewardIndex
+type MultiRewardIndexes []MultiRewardIndex
+
+// GetRewardIndex fetches a RewardIndex from a MultiRewardIndex by its denom
+func (mris MultiRewardIndexes) GetRewardIndex(denom string) (MultiRewardIndex, bool) {
+	for _, ri := range mris {
+		if ri.CollateralType == denom {
+			return ri, true
+		}
+	}
+	return MultiRewardIndex{}, false
+}
+
+// Get fetches a RewardIndexes by it's denom
+func (mris MultiRewardIndexes) Get(denom string) (RewardIndexes, bool) {
+	for _, mri := range mris {
+		if mri.CollateralType == denom {
+			return mri.RewardIndexes, true
+		}
+	}
+	return nil, false
+}
+
+// GetRewardIndexIndex fetches a specific reward index inside the array by its denom
+func (mris MultiRewardIndexes) GetRewardIndexIndex(denom string) (int, bool) {
+	for i, ri := range mris {
+		if ri.CollateralType == denom {
+			return i, true
+		}
+	}
+	return -1, false
+}
+
+// With returns a copy of the indexes with a new RewardIndexes added
+func (mris MultiRewardIndexes) With(denom string, indexes RewardIndexes) MultiRewardIndexes {
+	newIndexes := mris.copy()
+
+	for i, mri := range newIndexes {
+		if mri.CollateralType == denom {
+			newIndexes[i].RewardIndexes = indexes
+			return newIndexes
+		}
+	}
+	return append(newIndexes, NewMultiRewardIndex(denom, indexes))
+}
+
+// GetCollateralTypes returns a slice of containing all collateral types
+func (mris MultiRewardIndexes) GetCollateralTypes() []string {
+	var collateralTypes []string
+	for _, ri := range mris {
+		collateralTypes = append(collateralTypes, ri.CollateralType)
+	}
+	return collateralTypes
+}
+
+// RemoveRewardIndex removes a denom's reward interest factor value
+func (mris MultiRewardIndexes) RemoveRewardIndex(denom string) MultiRewardIndexes {
+	for i, ri := range mris {
+		if ri.CollateralType == denom {
+			// copy the slice and underlying array to avoid altering the original
+			copy := mris.copy()
+			return append(copy[:i], copy[i+1:]...)
+		}
+	}
+	return mris
+}
+
+// Validate validation for reward indexes
+func (mris MultiRewardIndexes) Validate() error {
+	for _, mri := range mris {
+		if err := mri.Validate(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// copy returns a copy of the slice and underlying array
+func (mris MultiRewardIndexes) copy() MultiRewardIndexes {
+	newIndexes := make(MultiRewardIndexes, len(mris))
+	copy(newIndexes, mris)
+	return newIndexes
+}

x/incentive/types/claims.go

@@ -167,12 +167,12 @@ type HardLiquidityProviderClaim struct {
 	BaseMultiClaim         `json:"base_claim" yaml:"base_claim"`
 	SupplyRewardIndexes    MultiRewardIndexes `json:"supply_reward_indexes" yaml:"supply_reward_indexes"`
 	BorrowRewardIndexes    MultiRewardIndexes `json:"borrow_reward_indexes" yaml:"borrow_reward_indexes"`
-	DelegatorRewardIndexes RewardIndexes      `json:"delegator_reward_indexes" yaml:"delegator_reward_indexes"`
+	DelegatorRewardIndexes MultiRewardIndexes `json:"delegator_reward_indexes" yaml:"delegator_reward_indexes"`
 }
 
 // NewHardLiquidityProviderClaim returns a new HardLiquidityProviderClaim
 func NewHardLiquidityProviderClaim(owner sdk.AccAddress, rewards sdk.Coins, supplyRewardIndexes,
-	borrowRewardIndexes MultiRewardIndexes, delegatorRewardIndexes RewardIndexes) HardLiquidityProviderClaim {
+	borrowRewardIndexes, delegatorRewardIndexes MultiRewardIndexes) HardLiquidityProviderClaim {
 	return HardLiquidityProviderClaim{
 		BaseMultiClaim: BaseMultiClaim{
 			Owner:  owner,

x/incentive/types/genesis_test.go

@@ -54,7 +54,7 @@ func TestGenesisStateValidate(t *testing.T) {
 					},
 					DefaultMultiRewardPeriods,
 					DefaultMultiRewardPeriods,
-					DefaultRewardPeriods,
+					DefaultMultiRewardPeriods,
 					Multipliers{
 						NewMultiplier(Small, 1, sdk.MustNewDecFromStr("0.33")),
 					},

x/incentive/types/keys.go

@@ -27,11 +27,11 @@ var (
 	USDXMintingRewardFactorKeyPrefix                = []byte{0x02} // prefix for key that stores USDX minting reward factors
 	PreviousUSDXMintingRewardAccrualTimeKeyPrefix   = []byte{0x03} // prefix for key that stores the blocktime
 	HardLiquidityClaimKeyPrefix                     = []byte{0x04} // prefix for keys that store Hard liquidity claims
-	HardSupplyRewardIndexesKeyPrefix                = []byte{0x05} // prefix for key that stores Hard supply reward factors
+	HardSupplyRewardIndexesKeyPrefix                = []byte{0x05} // prefix for key that stores Hard supply reward indexes
 	PreviousHardSupplyRewardAccrualTimeKeyPrefix    = []byte{0x06} // prefix for key that stores the previous time Hard supply rewards accrued
-	HardBorrowRewardIndexesKeyPrefix                = []byte{0x07} // prefix for key that stores Hard borrow reward factors
+	HardBorrowRewardIndexesKeyPrefix                = []byte{0x07} // prefix for key that stores Hard borrow reward indexes
 	PreviousHardBorrowRewardAccrualTimeKeyPrefix    = []byte{0x08} // prefix for key that stores the previous time Hard borrow rewards accrued
-	HardDelegatorRewardFactorKeyPrefix              = []byte{0x09} // prefix for key that stores Hard delegator reward factors
+	HardDelegatorRewardIndexesKeyPrefix             = []byte{0x09} // prefix for key that stores Hard delegator reward indexes
 	PreviousHardDelegatorRewardAccrualTimeKeyPrefix = []byte{0x10} // prefix for key that stores the previous time Hard delegator rewards accrued
 
 	USDXMintingRewardDenom   = "ukava"

x/incentive/types/params.go

@@ -48,14 +48,14 @@ type Params struct {
 	USDXMintingRewardPeriods   RewardPeriods      `json:"usdx_minting_reward_periods" yaml:"usdx_minting_reward_periods"`
 	HardSupplyRewardPeriods    MultiRewardPeriods `json:"hard_supply_reward_periods" yaml:"hard_supply_reward_periods"`
 	HardBorrowRewardPeriods    MultiRewardPeriods `json:"hard_borrow_reward_periods" yaml:"hard_borrow_reward_periods"`
-	HardDelegatorRewardPeriods RewardPeriods      `json:"hard_delegator_reward_periods" yaml:"hard_delegator_reward_periods"`
+	HardDelegatorRewardPeriods MultiRewardPeriods `json:"hard_delegator_reward_periods" yaml:"hard_delegator_reward_periods"`
 	ClaimMultipliers           Multipliers        `json:"claim_multipliers" yaml:"claim_multipliers"`
 	ClaimEnd                   time.Time          `json:"claim_end" yaml:"claim_end"`
 }
 
 // NewParams returns a new params object
-func NewParams(usdxMinting RewardPeriods, hardSupply, hardBorrow MultiRewardPeriods,
+func NewParams(usdxMinting RewardPeriods, hardSupply, hardBorrow, hardDelegator MultiRewardPeriods,
-	hardDelegator RewardPeriods, multipliers Multipliers, claimEnd time.Time) Params {
+	multipliers Multipliers, claimEnd time.Time) Params {
 	return Params{
 		USDXMintingRewardPeriods:   usdxMinting,
 		HardSupplyRewardPeriods:    hardSupply,
@@ -69,7 +69,9 @@ func NewParams(usdxMinting RewardPeriods, hardSupply, hardBorrow MultiRewardPeri
 // DefaultParams returns default params for incentive module
 func DefaultParams() Params {
 	return NewParams(DefaultRewardPeriods, DefaultMultiRewardPeriods,
-		DefaultMultiRewardPeriods, DefaultRewardPeriods, DefaultMultipliers, DefaultClaimEnd)
+		DefaultMultiRewardPeriods, DefaultMultiRewardPeriods,
+		DefaultMultipliers, DefaultClaimEnd,
+	)
 }
 
 // String implements fmt.Stringer
@@ -96,7 +98,7 @@ func (p *Params) ParamSetPairs() params.ParamSetPairs {
 		params.NewParamSetPair(KeyUSDXMintingRewardPeriods, &p.USDXMintingRewardPeriods, validateRewardPeriodsParam),
 		params.NewParamSetPair(KeyHardSupplyRewardPeriods, &p.HardSupplyRewardPeriods, validateMultiRewardPeriodsParam),
 		params.NewParamSetPair(KeyHardBorrowRewardPeriods, &p.HardBorrowRewardPeriods, validateMultiRewardPeriodsParam),
-		params.NewParamSetPair(KeyHardDelegatorRewardPeriods, &p.HardDelegatorRewardPeriods, validateRewardPeriodsParam),
+		params.NewParamSetPair(KeyHardDelegatorRewardPeriods, &p.HardDelegatorRewardPeriods, validateMultiRewardPeriodsParam),
 		params.NewParamSetPair(KeyClaimEnd, &p.ClaimEnd, validateClaimEndParam),
 		params.NewParamSetPair(KeyMultipliers, &p.ClaimMultipliers, validateMultipliersParam),
 	}
@@ -121,7 +123,7 @@ func (p Params) Validate() error {
 		return err
 	}
 
-	return validateRewardPeriodsParam(p.HardDelegatorRewardPeriods)
+	return validateMultiRewardPeriodsParam(p.HardDelegatorRewardPeriods)
 }
 
 func validateRewardPeriodsParam(i interface{}) error {

x/incentive/types/params_test.go

@@ -23,7 +23,7 @@ func (suite *ParamTestSuite) TestParamValidation() {
 		usdxMintingRewardPeriods   types.RewardPeriods
 		hardSupplyRewardPeriods    types.MultiRewardPeriods
 		hardBorrowRewardPeriods    types.MultiRewardPeriods
-		hardDelegatorRewardPeriods types.RewardPeriods
+		hardDelegatorRewardPeriods types.MultiRewardPeriods
 		multipliers                types.Multipliers
 		end                        time.Time
 	}
@@ -45,7 +45,7 @@ func (suite *ParamTestSuite) TestParamValidation() {
 				usdxMintingRewardPeriods:   types.DefaultRewardPeriods,
 				hardSupplyRewardPeriods:    types.DefaultMultiRewardPeriods,
 				hardBorrowRewardPeriods:    types.DefaultMultiRewardPeriods,
-				hardDelegatorRewardPeriods: types.DefaultRewardPeriods,
+				hardDelegatorRewardPeriods: types.DefaultMultiRewardPeriods,
 				multipliers:                types.DefaultMultipliers,
 				end:                        types.DefaultClaimEnd,
 			},
@@ -70,7 +70,7 @@ func (suite *ParamTestSuite) TestParamValidation() {
 				},
 				hardSupplyRewardPeriods:    types.DefaultMultiRewardPeriods,
 				hardBorrowRewardPeriods:    types.DefaultMultiRewardPeriods,
-				hardDelegatorRewardPeriods: types.DefaultRewardPeriods,
+				hardDelegatorRewardPeriods: types.DefaultMultiRewardPeriods,
 				end:                        time.Date(2025, 10, 15, 14, 0, 0, 0, time.UTC),
 			},
 			errArgs{

x/incentive/types/querier.go

@@ -121,18 +121,18 @@ type RewardFactor struct {
 	USDXMintingRewardFactor    sdk.Dec       `json:"usdx_minting_reward_factor" yaml:"usdx_minting_reward_factor"`
 	HardSupplyRewardFactors    RewardIndexes `json:"hard_supply_reward_factors" yaml:"hard_supply_reward_factors"`
 	HardBorrowRewardFactors    RewardIndexes `json:"hard_borrow_reward_factors" yaml:"hard_borrow_reward_factors"`
-	HardDelegatorRewardFactor sdk.Dec       `json:"hard_delegator_reward_factor" yaml:"hard_delegator_reward_factor"`
+	HardDelegatorRewardFactors RewardIndexes `json:"hard_delegator_reward_factors" yaml:"hard_delegator_reward_factors"`
 }
 
 // NewRewardFactor returns a new instance of RewardFactor
 func NewRewardFactor(denom string, usdxMintingRewardFactor sdk.Dec, hardSupplyRewardFactors,
-	hardBorrowRewardFactors RewardIndexes, hardDelegatorRewardFactor sdk.Dec) RewardFactor {
+	hardBorrowRewardFactors, hardDelegatorRewardFactors RewardIndexes) RewardFactor {
 	return RewardFactor{
 		Denom:                      denom,
 		USDXMintingRewardFactor:    usdxMintingRewardFactor,
 		HardSupplyRewardFactors:    hardSupplyRewardFactors,
 		HardBorrowRewardFactors:    hardBorrowRewardFactors,
-		HardDelegatorRewardFactor: hardDelegatorRewardFactor,
+		HardDelegatorRewardFactors: hardDelegatorRewardFactors,
 	}
 }