0g-chain/x/incentive/keeper/rewards_swap.go
Ruaridh c7962e45c0
Swaps accumulate global rewards (#947)
* add get set methods for swap reward indexes

* add get set methods for swap accrual time

* tidy up location of multi periods

* add swap reward periods to params

* add initial legacy types for incentive

* minor refactor of migration code

* add incentive migration for swap params

* minor incentive test refactors

* add math methods to RewardIndexes

* add keeper method to increment global indexes

* add swap keeper to incentive keeper

* indicate if pool shares were found or not

* add accumulator to compute new rewards each block

* accumulate swap rewards globally

* remove unecessary keeper method

* expand doc comments on accumulator methods

* test precision not lost in accumulation

* minor fixes from merge

* rename storeGlobalDelegatorFactor to match others

* fix migration from merge

* fix bug in app setup

* fix accumulation bug when starting with no state

* rename swap files to match others

* add swap accumulation times to genesis

* remove old migration refactor

* minor updates to spec

* add high level description of how rewards work
2021-07-07 14:23:06 +01:00

38 lines
1.2 KiB
Go

package keeper
import (
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/kava-labs/kava/x/incentive/types"
)
// AccumulateSwapRewards calculates new rewards to distribute this block and updates the global indexes to reflect this.
// The provided rewardPeriod must be valid to avoid panics in calculating time durations.
func (k Keeper) AccumulateSwapRewards(ctx sdk.Context, rewardPeriod types.MultiRewardPeriod) {
previousAccrualTime, found := k.GetSwapRewardAccrualTime(ctx, rewardPeriod.CollateralType)
if !found {
previousAccrualTime = ctx.BlockTime()
}
indexes, found := k.GetSwapRewardIndexes(ctx, rewardPeriod.CollateralType)
if !found {
indexes = types.RewardIndexes{}
}
acc := types.NewAccumulator(previousAccrualTime, indexes)
totalShares, found := k.swapKeeper.GetPoolShares(ctx, rewardPeriod.CollateralType)
if !found {
totalShares = sdk.ZeroDec()
}
acc.Accumulate(rewardPeriod, totalShares, ctx.BlockTime())
k.SetSwapRewardAccrualTime(ctx, rewardPeriod.CollateralType, acc.PreviousAccumulationTime)
if len(acc.Indexes) > 0 {
// the store panics when setting empty or nil indexes
k.SetSwapRewardIndexes(ctx, rewardPeriod.CollateralType, acc.Indexes)
}
}