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dyncomm.go
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dyncomm.go
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package keeper
import (
types "github.com/classic-terra/core/v3/x/dyncomm/types"
sdk "github.com/cosmos/cosmos-sdk/types"
stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
)
// GetVotingPower calculates the voting power of a validator in percent
func (k Keeper) CalculateVotingPower(ctx sdk.Context, validator stakingtypes.Validator) (ret sdk.Dec) {
totalPower := k.StakingKeeper.GetLastTotalPower(ctx).Int64()
validatorPower := sdk.TokensToConsensusPower(
validator.Tokens,
k.StakingKeeper.PowerReduction(ctx),
)
return sdk.NewDec(validatorPower).QuoInt64(totalPower).MulInt64(100)
}
// CalculateDynCommission calculates the min commission according
// to StrathColes formula
func (k Keeper) CalculateDynCommission(ctx sdk.Context, validator stakingtypes.Validator) (ret sdk.Dec) {
// The original parameters as defined
// by Strath
A := k.GetMaxZero(ctx)
B := k.GetSlopeBase(ctx)
C := k.GetSlopeVpImpact(ctx)
D := k.GetCap(ctx).MulInt64(100)
x := k.CalculateVotingPower(ctx, validator)
factorA := x.Sub(A)
quotient := x.Quo(C)
factorB := quotient.Add(B)
minComm := k.StakingKeeper.MinCommissionRate(ctx).MulInt64(100)
y := factorA.Mul(factorB)
if y.GT(D) {
y = D
}
if minComm.GT(y) {
y = minComm
}
return y.QuoInt64(100)
}
func (k Keeper) SetDynCommissionRate(ctx sdk.Context, validator string, rate sdk.Dec) {
var preSetRate types.ValidatorCommissionRate
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.GetMinCommissionRatesKey(validator))
targetRate := sdk.ZeroDec()
if bz != nil {
k.cdc.MustUnmarshal(bz, &preSetRate)
targetRate = *preSetRate.TargetCommissionRate
}
bz = k.cdc.MustMarshal(
&types.ValidatorCommissionRate{
ValidatorAddress: validator,
MinCommissionRate: &rate,
TargetCommissionRate: &targetRate,
},
)
store.Set(types.GetMinCommissionRatesKey(validator), bz)
}
func (k Keeper) SetTargetCommissionRate(ctx sdk.Context, validator string, rate sdk.Dec) {
var preSetRate types.ValidatorCommissionRate
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.GetMinCommissionRatesKey(validator))
minRate := sdk.ZeroDec()
if bz != nil {
k.cdc.MustUnmarshal(bz, &preSetRate)
minRate = *preSetRate.MinCommissionRate
}
bz = k.cdc.MustMarshal(
&types.ValidatorCommissionRate{
ValidatorAddress: validator,
MinCommissionRate: &minRate,
TargetCommissionRate: &rate,
},
)
store.Set(types.GetMinCommissionRatesKey(validator), bz)
}
func (k Keeper) GetDynCommissionRate(ctx sdk.Context, validator string) (rate sdk.Dec) {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.GetMinCommissionRatesKey(validator))
if bz == nil {
return sdk.ZeroDec()
}
var validatorRate types.ValidatorCommissionRate
k.cdc.MustUnmarshal(bz, &validatorRate)
return *validatorRate.MinCommissionRate
}
func (k Keeper) GetTargetCommissionRate(ctx sdk.Context, validator string) (rate sdk.Dec) {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.GetMinCommissionRatesKey(validator))
if bz == nil {
return sdk.ZeroDec()
}
var validatorRate types.ValidatorCommissionRate
k.cdc.MustUnmarshal(bz, &validatorRate)
return *validatorRate.TargetCommissionRate
}
// IterateDynCommissionRates iterates over dyn commission rates in the store
func (k Keeper) IterateDynCommissionRates(ctx sdk.Context, cb func(types.ValidatorCommissionRate) bool) {
store := ctx.KVStore(k.storeKey)
it := store.Iterator(nil, nil)
defer it.Close()
for ; it.Valid(); it.Next() {
var entry types.ValidatorCommissionRate
if err := entry.Unmarshal(it.Value()); err != nil {
panic(err)
}
if cb(entry) {
break
}
}
}
func (k Keeper) UpdateValidatorMinRates(ctx sdk.Context, validator stakingtypes.Validator) {
var newRate sdk.Dec
minRate := k.CalculateDynCommission(ctx, validator)
newMaxRate := validator.Commission.MaxRate
targetRate := k.GetTargetCommissionRate(ctx, validator.OperatorAddress)
// assume the newRate will be the target rate ...
newRate = targetRate
// ... but enforce min rate
if newRate.LT(minRate) {
newRate = minRate
}
// new min rate pushes max rate
if newMaxRate.LT(minRate) {
newMaxRate = minRate
}
newValidator := validator
newValidator.Commission = stakingtypes.NewCommissionWithTime(
newRate,
newMaxRate,
validator.Commission.MaxChangeRate,
validator.Commission.UpdateTime,
)
k.StakingKeeper.SetValidator(ctx, newValidator)
k.SetDynCommissionRate(ctx, validator.OperatorAddress, minRate)
// Debug
targetRate = k.GetTargetCommissionRate(ctx, validator.OperatorAddress)
ctx.Logger().Debug("dyncomm:", "val", validator.OperatorAddress, "min_rate", minRate, "new target_rate", targetRate)
}
func (k Keeper) UpdateAllBondedValidatorRates(ctx sdk.Context) (err error) {
k.StakingKeeper.IterateValidators(ctx, func(index int64, validator stakingtypes.ValidatorI) (stop bool) {
val := validator.(stakingtypes.Validator)
if !val.IsBonded() {
return false
}
k.UpdateValidatorMinRates(ctx, val)
return false
})
return nil
}