0g-chain/x/incentive/keeper/rewards.go
Denali Marsh 72a6df17fd
Hard: Kava delegators earn HARD rewards via the Incentive module (#776)
* add staking keeper to incentive module

* update hard with delegator methods

* add delegator methods to incentive

* implement delegator hook scaffolds

* implement hard delegator reward accumulation

* update claim names to delegator

* stakingKeeper expected keeper methods

* accumulate delegator rewards

* initialize delegator reward

* synchronize delegator reward

* add TODO comments to rewards

* implement staking hooks interface

* initial revisions

* remove outdated TODO

* update methods for test compatibility

* update method names for test compatibility

* implement initial accumulate delegator reward test

* attempt validator set up in staking module

* initial synchronize delegator reward test

* delegator accumulation test passing

* synchronize delegator rewards test (not passing)

* synchronize delegator rewards passing

* revisions
2021-01-25 13:58:12 +01:00

565 lines
21 KiB
Go

package keeper
import (
"fmt"
"math"
"time"
sdk "github.com/cosmos/cosmos-sdk/types"
cdptypes "github.com/kava-labs/kava/x/cdp/types"
hardtypes "github.com/kava-labs/kava/x/hard/types"
"github.com/kava-labs/kava/x/incentive/types"
)
// AccumulateUSDXMintingRewards updates the rewards accumulated for the input reward period
func (k Keeper) AccumulateUSDXMintingRewards(ctx sdk.Context, rewardPeriod types.RewardPeriod) error {
previousAccrualTime, found := k.GetPreviousUSDXMintingAccrualTime(ctx, rewardPeriod.CollateralType)
if !found {
k.SetPreviousUSDXMintingAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
timeElapsed := CalculateTimeElapsed(rewardPeriod, ctx.BlockTime(), previousAccrualTime)
if timeElapsed.IsZero() {
return nil
}
if rewardPeriod.RewardsPerSecond.Amount.IsZero() {
k.SetPreviousUSDXMintingAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
totalPrincipal := k.cdpKeeper.GetTotalPrincipal(ctx, rewardPeriod.CollateralType, types.PrincipalDenom).ToDec()
if totalPrincipal.IsZero() {
k.SetPreviousUSDXMintingAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
newRewards := timeElapsed.Mul(rewardPeriod.RewardsPerSecond.Amount)
cdpFactor, found := k.cdpKeeper.GetInterestFactor(ctx, rewardPeriod.CollateralType)
if !found {
k.SetPreviousUSDXMintingAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
rewardFactor := newRewards.ToDec().Mul(cdpFactor).Quo(totalPrincipal)
previousRewardFactor, found := k.GetUSDXMintingRewardFactor(ctx, rewardPeriod.CollateralType)
if !found {
previousRewardFactor = sdk.ZeroDec()
}
newRewardFactor := previousRewardFactor.Add(rewardFactor)
k.SetUSDXMintingRewardFactor(ctx, rewardPeriod.CollateralType, newRewardFactor)
k.SetPreviousUSDXMintingAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
// AccumulateHardBorrowRewards updates the rewards accumulated for the input reward period
func (k Keeper) AccumulateHardBorrowRewards(ctx sdk.Context, rewardPeriod types.RewardPeriod) error {
previousAccrualTime, found := k.GetPreviousHardBorrowRewardAccrualTime(ctx, rewardPeriod.CollateralType)
if !found {
k.SetPreviousHardBorrowRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
timeElapsed := CalculateTimeElapsed(rewardPeriod, ctx.BlockTime(), previousAccrualTime)
if timeElapsed.IsZero() {
return nil
}
if rewardPeriod.RewardsPerSecond.Amount.IsZero() {
k.SetPreviousHardBorrowRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
totalBorrowedCoins, foundTotalBorrowedCoins := k.hardKeeper.GetBorrowedCoins(ctx)
if foundTotalBorrowedCoins {
totalBorrowed := totalBorrowedCoins.AmountOf(rewardPeriod.CollateralType).ToDec()
if totalBorrowed.IsZero() {
k.SetPreviousHardBorrowRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
newRewards := timeElapsed.Mul(rewardPeriod.RewardsPerSecond.Amount)
hardFactor, found := k.hardKeeper.GetBorrowInterestFactor(ctx, rewardPeriod.CollateralType)
if !found {
k.SetPreviousHardBorrowRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
rewardFactor := newRewards.ToDec().Mul(hardFactor).Quo(totalBorrowed)
previousRewardFactor, found := k.GetHardBorrowRewardFactor(ctx, rewardPeriod.CollateralType)
if !found {
previousRewardFactor = sdk.ZeroDec()
}
newRewardFactor := previousRewardFactor.Add(rewardFactor)
k.SetHardBorrowRewardFactor(ctx, rewardPeriod.CollateralType, newRewardFactor)
}
k.SetPreviousHardBorrowRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
// AccumulateHardSupplyRewards updates the rewards accumulated for the input reward period
func (k Keeper) AccumulateHardSupplyRewards(ctx sdk.Context, rewardPeriod types.RewardPeriod) error {
previousAccrualTime, found := k.GetPreviousHardSupplyRewardAccrualTime(ctx, rewardPeriod.CollateralType)
if !found {
k.SetPreviousHardSupplyRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
timeElapsed := CalculateTimeElapsed(rewardPeriod, ctx.BlockTime(), previousAccrualTime)
if timeElapsed.IsZero() {
return nil
}
if rewardPeriod.RewardsPerSecond.Amount.IsZero() {
k.SetPreviousHardSupplyRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
totalSuppliedCoins, foundTotalSuppliedCoins := k.hardKeeper.GetSuppliedCoins(ctx)
if foundTotalSuppliedCoins {
totalSupplied := totalSuppliedCoins.AmountOf(rewardPeriod.CollateralType).ToDec()
if totalSupplied.IsZero() {
k.SetPreviousHardSupplyRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
newRewards := timeElapsed.Mul(rewardPeriod.RewardsPerSecond.Amount)
hardFactor, found := k.hardKeeper.GetSupplyInterestFactor(ctx, rewardPeriod.CollateralType)
if !found {
k.SetPreviousHardSupplyRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
rewardFactor := newRewards.ToDec().Mul(hardFactor).Quo(totalSupplied)
previousRewardFactor, found := k.GetHardSupplyRewardFactor(ctx, rewardPeriod.CollateralType)
if !found {
previousRewardFactor = sdk.ZeroDec()
}
newRewardFactor := previousRewardFactor.Add(rewardFactor)
k.SetHardSupplyRewardFactor(ctx, rewardPeriod.CollateralType, newRewardFactor)
}
k.SetPreviousHardSupplyRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
// InitializeUSDXMintingClaim creates or updates a claim such that no new rewards are accrued, but any existing rewards are not lost.
// this function should be called after a cdp is created. If a user previously had a cdp, then closed it, they shouldn't
// accrue rewards during the period the cdp was closed. By setting the reward factor to the current global reward factor,
// any unclaimed rewards are preserved, but no new rewards are added.
func (k Keeper) InitializeUSDXMintingClaim(ctx sdk.Context, cdp cdptypes.CDP) {
_, found := k.GetUSDXMintingRewardPeriod(ctx, cdp.Type)
if !found {
// this collateral type is not incentivized, do nothing
return
}
rewardFactor, found := k.GetUSDXMintingRewardFactor(ctx, cdp.Type)
if !found {
rewardFactor = sdk.ZeroDec()
}
claim, found := k.GetUSDXMintingClaim(ctx, cdp.Owner)
if !found { // this is the owner's first usdx minting reward claim
claim = types.NewUSDXMintingClaim(cdp.Owner, sdk.NewCoin(types.USDXMintingRewardDenom, sdk.ZeroInt()), types.RewardIndexes{types.NewRewardIndex(cdp.Type, rewardFactor)})
k.SetUSDXMintingClaim(ctx, claim)
return
}
// the owner has an existing usdx minting reward claim
index, hasRewardIndex := claim.HasRewardIndex(cdp.Type)
if !hasRewardIndex { // this is the owner's first usdx minting reward for this collateral type
claim.RewardIndexes = append(claim.RewardIndexes, types.NewRewardIndex(cdp.Type, rewardFactor))
} else { // the owner has a previous usdx minting reward for this collateral type
claim.RewardIndexes[index] = types.NewRewardIndex(cdp.Type, rewardFactor)
}
k.SetUSDXMintingClaim(ctx, claim)
}
// SynchronizeUSDXMintingReward updates the claim object by adding any accumulated rewards and updating the reward index value.
// this should be called before a cdp is modified, immediately after the 'SynchronizeInterest' method is called in the cdp module
func (k Keeper) SynchronizeUSDXMintingReward(ctx sdk.Context, cdp cdptypes.CDP) {
_, found := k.GetUSDXMintingRewardPeriod(ctx, cdp.Type)
if !found {
// this collateral type is not incentivized, do nothing
return
}
globalRewardFactor, found := k.GetUSDXMintingRewardFactor(ctx, cdp.Type)
if !found {
globalRewardFactor = sdk.ZeroDec()
}
claim, found := k.GetUSDXMintingClaim(ctx, cdp.Owner)
if !found {
claim = types.NewUSDXMintingClaim(cdp.Owner, sdk.NewCoin(types.USDXMintingRewardDenom, sdk.ZeroInt()), types.RewardIndexes{types.NewRewardIndex(cdp.Type, globalRewardFactor)})
k.SetUSDXMintingClaim(ctx, claim)
return
}
// the owner has an existing usdx minting reward claim
index, hasRewardIndex := claim.HasRewardIndex(cdp.Type)
if !hasRewardIndex { // this is the owner's first usdx minting reward for this collateral type
claim.RewardIndexes = append(claim.RewardIndexes, types.NewRewardIndex(cdp.Type, globalRewardFactor))
k.SetUSDXMintingClaim(ctx, claim)
return
}
userRewardFactor := claim.RewardIndexes[index].RewardFactor
rewardsAccumulatedFactor := globalRewardFactor.Sub(userRewardFactor)
if rewardsAccumulatedFactor.IsZero() {
return
}
claim.RewardIndexes[index].RewardFactor = globalRewardFactor
newRewardsAmount := rewardsAccumulatedFactor.Mul(cdp.GetTotalPrincipal().Amount.ToDec()).RoundInt()
if newRewardsAmount.IsZero() {
k.SetUSDXMintingClaim(ctx, claim)
return
}
newRewardsCoin := sdk.NewCoin(types.USDXMintingRewardDenom, newRewardsAmount)
claim.Reward = claim.Reward.Add(newRewardsCoin)
k.SetUSDXMintingClaim(ctx, claim)
return
}
// InitializeHardSupplyReward initializes the supply-side of a hard liquidity provider claim
// by creating the claim and setting the supply reward factor index
func (k Keeper) InitializeHardSupplyReward(ctx sdk.Context, deposit hardtypes.Deposit) {
var supplyRewardIndexes types.RewardIndexes
for _, coin := range deposit.Amount {
_, rpFound := k.GetHardSupplyRewardPeriod(ctx, coin.Denom)
if !rpFound {
continue
}
supplyFactor, foundSupplyFactor := k.GetHardSupplyRewardFactor(ctx, coin.Denom)
if !foundSupplyFactor {
supplyFactor = sdk.ZeroDec()
}
supplyRewardIndexes = append(supplyRewardIndexes, types.NewRewardIndex(coin.Denom, supplyFactor))
}
claim, found := k.GetHardLiquidityProviderClaim(ctx, deposit.Depositor)
if found {
// Reset borrow reward indexes
claim.BorrowRewardIndexes = types.RewardIndexes{}
} else {
// Instantiate claim object
claim = types.NewHardLiquidityProviderClaim(deposit.Depositor,
sdk.NewCoin(types.HardLiquidityRewardDenom, sdk.ZeroInt()),
nil, nil, nil)
}
claim.SupplyRewardIndexes = supplyRewardIndexes
k.SetHardLiquidityProviderClaim(ctx, claim)
}
// SynchronizeHardSupplyReward updates the claim object by adding any accumulated rewards
// and updating the reward index value
func (k Keeper) SynchronizeHardSupplyReward(ctx sdk.Context, deposit hardtypes.Deposit) {
claim, found := k.GetHardLiquidityProviderClaim(ctx, deposit.Depositor)
if !found {
return
}
for _, coin := range deposit.Amount {
supplyFactor, found := k.GetHardSupplyRewardFactor(ctx, coin.Denom)
if !found {
fmt.Printf("\n[LOG]: %s does not have a supply factor", coin.Denom) // TODO: remove before production
continue
}
supplyIndex, hasSupplyRewardIndex := claim.HasSupplyRewardIndex(coin.Denom)
if !hasSupplyRewardIndex {
continue
}
userRewardFactor := claim.SupplyRewardIndexes[supplyIndex].RewardFactor
rewardsAccumulatedFactor := supplyFactor.Sub(userRewardFactor)
if rewardsAccumulatedFactor.IsZero() {
continue
}
claim.SupplyRewardIndexes[supplyIndex].RewardFactor = supplyFactor
newRewardsAmount := rewardsAccumulatedFactor.Mul(deposit.Amount.AmountOf(coin.Denom).ToDec()).RoundInt()
if newRewardsAmount.IsZero() || newRewardsAmount.IsNegative() {
continue
}
newRewardsCoin := sdk.NewCoin(types.HardLiquidityRewardDenom, newRewardsAmount)
claim.Reward = claim.Reward.Add(newRewardsCoin)
}
k.SetHardLiquidityProviderClaim(ctx, claim)
}
// InitializeHardBorrowReward initializes the borrow-side of a hard liquidity provider claim
// by creating the claim and setting the borrow reward factor index
func (k Keeper) InitializeHardBorrowReward(ctx sdk.Context, borrow hardtypes.Borrow) {
claim, found := k.GetHardLiquidityProviderClaim(ctx, borrow.Borrower)
if !found {
claim = types.NewHardLiquidityProviderClaim(borrow.Borrower,
sdk.NewCoin(types.HardLiquidityRewardDenom, sdk.ZeroInt()),
nil, nil, nil)
}
var borrowRewardIndexes types.RewardIndexes
for _, coin := range borrow.Amount {
_, rpFound := k.GetHardBorrowRewardPeriod(ctx, coin.Denom)
if !rpFound {
continue
}
borrowFactor, foundBorrowFactor := k.GetHardBorrowRewardFactor(ctx, coin.Denom)
if !foundBorrowFactor {
borrowFactor = sdk.ZeroDec()
}
borrowRewardIndexes = append(borrowRewardIndexes, types.NewRewardIndex(coin.Denom, borrowFactor))
}
claim.BorrowRewardIndexes = borrowRewardIndexes
k.SetHardLiquidityProviderClaim(ctx, claim)
}
// SynchronizeHardBorrowReward updates the claim object by adding any accumulated rewards
// and updating the reward index value
func (k Keeper) SynchronizeHardBorrowReward(ctx sdk.Context, borrow hardtypes.Borrow) {
claim, found := k.GetHardLiquidityProviderClaim(ctx, borrow.Borrower)
if !found {
return
}
for _, coin := range borrow.Amount {
borrowFactor, found := k.GetHardBorrowRewardFactor(ctx, coin.Denom)
if !found {
continue
}
borrowIndex, BorrowRewardIndex := claim.HasBorrowRewardIndex(coin.Denom)
if !BorrowRewardIndex {
continue
}
userRewardFactor := claim.BorrowRewardIndexes[borrowIndex].RewardFactor
rewardsAccumulatedFactor := borrowFactor.Sub(userRewardFactor)
if rewardsAccumulatedFactor.IsZero() {
continue
}
claim.BorrowRewardIndexes[borrowIndex].RewardFactor = borrowFactor
newRewardsAmount := rewardsAccumulatedFactor.Mul(borrow.Amount.AmountOf(coin.Denom).ToDec()).RoundInt()
if newRewardsAmount.IsZero() || newRewardsAmount.IsNegative() {
continue
}
newRewardsCoin := sdk.NewCoin(types.HardLiquidityRewardDenom, newRewardsAmount)
claim.Reward = claim.Reward.Add(newRewardsCoin)
}
k.SetHardLiquidityProviderClaim(ctx, claim)
}
// UpdateHardSupplyIndexDenoms adds any new deposit denoms to the claim's supply reward index
func (k Keeper) UpdateHardSupplyIndexDenoms(ctx sdk.Context, deposit hardtypes.Deposit) {
claim, found := k.GetHardLiquidityProviderClaim(ctx, deposit.Depositor)
if !found {
claim = types.NewHardLiquidityProviderClaim(deposit.Depositor,
sdk.NewCoin(types.HardLiquidityRewardDenom, sdk.ZeroInt()),
nil, nil, nil)
}
supplyRewardIndexes := claim.SupplyRewardIndexes
for _, coin := range deposit.Amount {
_, hasIndex := claim.HasSupplyRewardIndex(coin.Denom)
if !hasIndex {
supplyFactor, foundSupplyFactor := k.GetHardSupplyRewardFactor(ctx, coin.Denom)
if foundSupplyFactor {
supplyRewardIndexes = append(supplyRewardIndexes, types.NewRewardIndex(coin.Denom, supplyFactor))
}
}
}
if len(supplyRewardIndexes) == 0 {
return
}
claim.SupplyRewardIndexes = supplyRewardIndexes
k.SetHardLiquidityProviderClaim(ctx, claim)
}
// UpdateHardBorrowIndexDenoms adds any new borrow denoms to the claim's supply reward index
func (k Keeper) UpdateHardBorrowIndexDenoms(ctx sdk.Context, borrow hardtypes.Borrow) {
claim, found := k.GetHardLiquidityProviderClaim(ctx, borrow.Borrower)
if !found {
claim = types.NewHardLiquidityProviderClaim(borrow.Borrower,
sdk.NewCoin(types.HardLiquidityRewardDenom, sdk.ZeroInt()),
nil, nil, nil)
}
borrowRewardIndexes := claim.BorrowRewardIndexes
for _, coin := range borrow.Amount {
_, hasIndex := claim.HasBorrowRewardIndex(coin.Denom)
if !hasIndex {
borrowFactor, foundBorrowFactor := k.GetHardBorrowRewardFactor(ctx, coin.Denom)
if foundBorrowFactor {
borrowRewardIndexes = append(borrowRewardIndexes, types.NewRewardIndex(coin.Denom, borrowFactor))
}
}
}
if len(borrowRewardIndexes) == 0 {
return
}
claim.BorrowRewardIndexes = borrowRewardIndexes
k.SetHardLiquidityProviderClaim(ctx, claim)
}
// SynchronizeHardDelegatorRewards updates the claim object by adding any accumulated rewards
func (k Keeper) SynchronizeHardDelegatorRewards(ctx sdk.Context, delegator sdk.AccAddress) {
claim, found := k.GetHardLiquidityProviderClaim(ctx, delegator)
if !found {
return
}
delagatorFactor, found := k.GetHardDelegatorRewardFactor(ctx, types.BondDenom)
if !found {
return
}
delegatorIndex, hasDelegatorRewardIndex := claim.HasDelegatorRewardIndex(types.BondDenom)
if !hasDelegatorRewardIndex {
return
}
userRewardFactor := claim.DelegatorRewardIndexes[delegatorIndex].RewardFactor
rewardsAccumulatedFactor := delagatorFactor.Sub(userRewardFactor)
if rewardsAccumulatedFactor.IsZero() {
return
}
claim.DelegatorRewardIndexes[delegatorIndex].RewardFactor = delagatorFactor
totalDelegated := sdk.ZeroDec()
// TODO: set reasonable max limit on delegation iteration
maxUInt := ^uint16(0)
delegations := k.stakingKeeper.GetDelegatorDelegations(ctx, delegator, maxUInt)
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
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
}
// Add rewards to delegator's hard claim
newRewardsCoin := sdk.NewCoin(types.HardLiquidityRewardDenom, rewardsEarned)
claim.Reward = claim.Reward.Add(newRewardsCoin)
k.SetHardLiquidityProviderClaim(ctx, claim)
}
// AccumulateHardDelegatorRewards updates the rewards accumulated for the input reward period
func (k Keeper) AccumulateHardDelegatorRewards(ctx sdk.Context, rewardPeriod types.RewardPeriod) error {
previousAccrualTime, found := k.GetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriod.CollateralType)
if !found {
k.SetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
timeElapsed := CalculateTimeElapsed(rewardPeriod, ctx.BlockTime(), previousAccrualTime)
if timeElapsed.IsZero() {
return nil
}
if rewardPeriod.RewardsPerSecond.Amount.IsZero() {
k.SetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
totalBonded := k.stakingKeeper.TotalBondedTokens(ctx).ToDec()
if totalBonded.IsZero() {
k.SetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
newRewards := timeElapsed.Mul(rewardPeriod.RewardsPerSecond.Amount)
rewardFactor := newRewards.ToDec().Quo(totalBonded)
previousRewardFactor, found := k.GetHardDelegatorRewardFactor(ctx, rewardPeriod.CollateralType)
if !found {
previousRewardFactor = sdk.ZeroDec()
}
newRewardFactor := previousRewardFactor.Add(rewardFactor)
k.SetHardDelegatorRewardFactor(ctx, rewardPeriod.CollateralType, newRewardFactor)
k.SetPreviousHardDelegatorRewardAccrualTime(ctx, rewardPeriod.CollateralType, ctx.BlockTime())
return nil
}
// InitializeHardDelegatorReward initializes the delegator reward index of a hard claim
func (k Keeper) InitializeHardDelegatorReward(ctx sdk.Context, delegator sdk.AccAddress) {
delegatorFactor, foundDelegatorFactor := k.GetHardDelegatorRewardFactor(ctx, types.BondDenom)
if !foundDelegatorFactor { // Should always be found...
delegatorFactor = sdk.ZeroDec()
}
delegatorRewardIndexes := types.NewRewardIndex(types.BondDenom, delegatorFactor)
claim, found := k.GetHardLiquidityProviderClaim(ctx, delegator)
if !found {
// Instantiate claim object
claim = types.NewHardLiquidityProviderClaim(delegator,
sdk.NewCoin(types.HardLiquidityRewardDenom, sdk.ZeroInt()),
nil, nil, nil)
}
claim.DelegatorRewardIndexes = types.RewardIndexes{delegatorRewardIndexes}
k.SetHardLiquidityProviderClaim(ctx, claim)
}
// ZeroClaim zeroes out the claim object's rewards and returns the updated claim object
func (k Keeper) ZeroClaim(ctx sdk.Context, claim types.USDXMintingClaim) types.USDXMintingClaim {
claim.Reward = sdk.NewCoin(claim.Reward.Denom, sdk.ZeroInt())
k.SetUSDXMintingClaim(ctx, claim)
return claim
}
// SynchronizeClaim updates the claim object by adding any rewards that have accumulated.
// Returns the updated claim object
func (k Keeper) SynchronizeClaim(ctx sdk.Context, claim types.USDXMintingClaim) (types.USDXMintingClaim, error) {
for _, ri := range claim.RewardIndexes {
cdp, found := k.cdpKeeper.GetCdpByOwnerAndCollateralType(ctx, claim.Owner, ri.CollateralType)
if !found {
// if the cdp for this collateral type has been closed, no updates are needed
continue
}
claim = k.synchronizeRewardAndReturnClaim(ctx, cdp)
}
return claim, nil
}
// this function assumes a claim already exists, so don't call it if that's not the case
func (k Keeper) synchronizeRewardAndReturnClaim(ctx sdk.Context, cdp cdptypes.CDP) types.USDXMintingClaim {
k.SynchronizeUSDXMintingReward(ctx, cdp)
claim, _ := k.GetUSDXMintingClaim(ctx, cdp.Owner)
return claim
}
// CalculateTimeElapsed calculates the number of reward-eligible seconds that have passed since the previous
// time rewards were accrued, taking into account the end time of the reward period
func CalculateTimeElapsed(rewardPeriod types.RewardPeriod, blockTime time.Time, previousAccrualTime time.Time) sdk.Int {
if rewardPeriod.End.Before(blockTime) &&
(rewardPeriod.End.Before(previousAccrualTime) || rewardPeriod.End.Equal(previousAccrualTime)) {
return sdk.ZeroInt()
}
if rewardPeriod.End.Before(blockTime) {
return sdk.NewInt(int64(math.RoundToEven(
rewardPeriod.End.Sub(previousAccrualTime).Seconds(),
)))
}
return sdk.NewInt(int64(math.RoundToEven(
blockTime.Sub(previousAccrualTime).Seconds(),
)))
}