2018-04-26 19:59:30 -07:00
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package stake
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import (
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sdk "github.com/cosmos/cosmos-sdk/types"
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)
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2018-04-27 12:20:12 -07:00
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// Handle fee distribution to the validators and delegators
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2018-04-30 23:07:06 -07:00
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func (k Keeper) FeeHandler(ctx sdk.Context, collectedFees sdk.Coins) {
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pool := k.GetPool(ctx)
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params := k.GetParams(ctx)
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2018-04-26 19:59:30 -07:00
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2018-05-03 21:02:45 -07:00
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// XXX determine
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2018-04-30 23:07:06 -07:00
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candidate := NewCandidate(addrs[0], pks[0], Description{})
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2018-05-03 21:02:45 -07:00
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// calculate the proposer reward
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precommitPower := k.GetTotalPrecommitVotingPower(ctx)
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toProposer := coinsMulRat(collectedFees, (sdk.NewRat(1, 100).Add(sdk.NewRat(4, 100).Mul(precommitPower).Quo(pool.BondedShares))))
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2018-04-30 23:07:06 -07:00
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candidate.ProposerRewardPool = candidate.ProposerRewardPool.Plus(toProposer)
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toReservePool := coinsMulRat(collectedFees, params.ReservePoolFee)
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pool.ReservePool = pool.ReservePool.Plus(toReservePool)
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distributedReward := (collectedFees.Minus(toProposer)).Minus(toReservePool)
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pool.FeePool = pool.FeePool.Plus(distributedReward)
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pool.SumFeesReceived = pool.SumFeesReceived.Plus(distributedReward)
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pool.RecentFee = distributedReward
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k.setPool(ctx, pool)
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}
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func coinsMulRat(coins sdk.Coins, rat sdk.Rat) sdk.Coins {
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var res sdk.Coins
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for _, coin := range coins {
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coinMulAmt := rat.Mul(sdk.NewRat(coin.Amount)).Evaluate()
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coinMul := sdk.Coins{{coin.Denom, coinMulAmt}}
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res = res.Plus(coinMul)
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}
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return res
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2018-04-26 19:59:30 -07:00
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}
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2018-05-03 23:00:30 -07:00
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//____________________________________________________________________________-
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// calculate adjustment changes for a candidate at a height
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func CalculateAdjustmentChange(candidate Candidate, pool Pool, height int64) (candidate, pool) {
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heightRat := sdk.NewRat(height)
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lastHeightRat := sdk.NewRat(height - 1)
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candidateFeeCount := candidate.VotingPower.Mul(heightRat)
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poolFeeCount := pool.BondedShares.Mul(heightRat)
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// calculate simple and projected pools
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simplePool := candidateFeeCount.Quo(poolFeeCount).Mul(pool.SumFeesReceived)
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calc1 := candidate.PrevPower.Mul(lastHeightRat).Div(pool.PrevPower.Mul(lastHeightRat)).Mul(pool.PrevFeesReceived)
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calc2 := candidate.Power.Div(pool.Power).Mul(pool.RecentFee)
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projectedPool := calc1 + calc2
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AdjustmentChange := simplePool.Sub(projectedPool)
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candidate.Adjustment += AdjustmentChange
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pool.Adjustment += AdjustmentChange
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return candidate, pool
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}
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