/
rewards.go
72 lines (62 loc) · 2.77 KB
/
rewards.go
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package keeper
import (
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/certikfoundation/shentu/v2/x/shield/types"
)
// PayoutNativeRewards pays out pending CTK rewards.
func (k Keeper) PayoutNativeRewards(ctx sdk.Context, addr sdk.AccAddress) (sdk.Coins, error) {
provider, found := k.GetProvider(ctx, addr)
if !found {
return sdk.Coins{}, types.ErrProviderNotFound
}
ctkRewards, change := provider.Rewards.Native.TruncateDecimal()
if ctkRewards.IsZero() {
return nil, nil
}
provider.Rewards.Native = sdk.DecCoins{}
providerAddr, err := sdk.AccAddressFromBech32(provider.Address)
if err != nil {
panic(err)
}
k.SetProvider(ctx, providerAddr, provider)
// Add leftovers as service fees.
remainingServiceFees := k.GetRemainingServiceFees(ctx)
remainingServiceFees.Native = remainingServiceFees.Native.Add(change...)
k.SetRemainingServiceFees(ctx, remainingServiceFees)
if err := k.bk.SendCoinsFromModuleToAccount(ctx, types.ModuleName, addr, ctkRewards); err != nil {
return sdk.Coins{}, err
}
return ctkRewards, nil
}
// GetShieldBlockRewardRatio calculates the dynamic ratio for block rewards to shield module, based on total shield and total collateral.
func (k Keeper) GetShieldBlockRewardRatio(ctx sdk.Context) sdk.Dec {
totalShield := k.GetTotalShield(ctx)
totalCollateral := k.GetTotalCollateral(ctx)
totalBondedTokens := k.bk.GetAllBalances(ctx, k.sk.GetBondedPool(ctx).GetAddress()).AmountOf(k.BondDenom(ctx)).ToDec() // c + n
totalShieldDeposit := k.GetGlobalShieldStakingPool(ctx).ToDec() // d
var leverage sdk.Dec // l = (total shield) / (total collateral)
if totalCollateral.IsZero() {
leverage = sdk.ZeroDec()
} else {
leverage = totalShield.ToDec().Quo(totalCollateral.ToDec())
}
blockRewardParams := k.GetDistributionParams(ctx)
modelParamA := blockRewardParams.ModelParamA // a
modelParamB := blockRewardParams.ModelParamB // b
targetLeverage := blockRewardParams.MaxLeverage // L
/* The non-linear model:
* c+n l d
* r = -------- ( a + 2(b - a) * ------- + -----)
* c+n+d l + L c+n
*/
if leverage.Add(targetLeverage).IsZero() || totalBondedTokens.IsZero() {
return sdk.ZeroDec()
} else {
leading := totalBondedTokens.Quo(totalBondedTokens.Add(totalShieldDeposit)) // (c+n)/(c+n+d)
first := modelParamA // a
second := leverage.Quo(leverage.Add(targetLeverage)).Mul(modelParamB.Sub(modelParamA).MulInt64(2)) // 2(b-a)(l/l+L)
third := totalShieldDeposit.Quo(totalBondedTokens) // d/(c+n)
inner := first.Add(second).Add(third)
return leading.Mul(inner)
}
}