mirror of
https://github.com/0glabs/0g-chain.git
synced 2024-11-10 10:05:18 +00:00
ffef832d45
- Upgrade cosmos-sdk to v0.44.5 from v0.39.2 - Add Legacy Tx Endpoint for backwards compatibility - Add IBC v1.2.3 Support Co-authored-by: DracoLi <draco@dracoli.com> Co-authored-by: drklee3 <derrick@dlee.dev> Co-authored-by: denalimarsh <denalimarsh@gmail.com> Co-authored-by: Draco Li <draco@kava.io> Co-authored-by: Nick DeLuca <nickdeluca08@gmail.com> Co-authored-by: Kevin Davis <karzak@users.noreply.github.com> Co-authored-by: Denali Marsh <denali@kava.io>
94 lines
3.4 KiB
Go
94 lines
3.4 KiB
Go
package keeper
|
|
|
|
import (
|
|
sdk "github.com/cosmos/cosmos-sdk/types"
|
|
|
|
"github.com/kava-labs/kava/x/kavadist/types"
|
|
)
|
|
|
|
// MintPeriodInflation mints new tokens according to the inflation schedule specified in the parameters
|
|
func (k Keeper) MintPeriodInflation(ctx sdk.Context) error {
|
|
params := k.GetParams(ctx)
|
|
if !params.Active {
|
|
ctx.EventManager().EmitEvent(
|
|
sdk.NewEvent(
|
|
types.EventTypeKavaDist,
|
|
sdk.NewAttribute(types.AttributeKeyStatus, types.AttributeValueInactive),
|
|
),
|
|
)
|
|
return nil
|
|
}
|
|
|
|
previousBlockTime, found := k.GetPreviousBlockTime(ctx)
|
|
if !found {
|
|
previousBlockTime = ctx.BlockTime()
|
|
k.SetPreviousBlockTime(ctx, previousBlockTime)
|
|
return nil
|
|
}
|
|
|
|
var err error
|
|
for _, period := range params.Periods {
|
|
switch {
|
|
// Case 1 - period is fully expired
|
|
case period.End.Before(previousBlockTime):
|
|
continue
|
|
|
|
// Case 2 - period has ended since the previous block time
|
|
case period.End.After(previousBlockTime) && period.End.Before(ctx.BlockTime()):
|
|
// calculate time elapsed relative to the periods end time
|
|
timeElapsed := sdk.NewInt(period.End.Unix() - previousBlockTime.Unix())
|
|
err = k.mintInflationaryCoins(ctx, period.Inflation, timeElapsed, types.GovDenom)
|
|
// update the value of previousBlockTime so that the next period starts from the end of the last
|
|
// period and not the original value of previousBlockTime
|
|
previousBlockTime = period.End
|
|
|
|
// Case 3 - period is ongoing
|
|
case (period.Start.Before(previousBlockTime) || period.Start.Equal(previousBlockTime)) && period.End.After(ctx.BlockTime()):
|
|
// calculate time elapsed relative to the current block time
|
|
timeElapsed := sdk.NewInt(ctx.BlockTime().Unix() - previousBlockTime.Unix())
|
|
err = k.mintInflationaryCoins(ctx, period.Inflation, timeElapsed, types.GovDenom)
|
|
|
|
// Case 4 - period hasn't started
|
|
case period.Start.After(ctx.BlockTime()) || period.Start.Equal(ctx.BlockTime()):
|
|
continue
|
|
}
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
k.SetPreviousBlockTime(ctx, ctx.BlockTime())
|
|
return nil
|
|
}
|
|
|
|
func (k Keeper) mintInflationaryCoins(ctx sdk.Context, inflationRate sdk.Dec, timePeriods sdk.Int, denom string) error {
|
|
totalSupply := k.bankKeeper.GetSupply(ctx, denom)
|
|
// used to scale accumulator calculations by 10^18
|
|
scalar := sdk.NewInt(1000000000000000000)
|
|
// convert inflation rate to integer
|
|
inflationInt := sdk.NewUintFromBigInt(inflationRate.Mul(sdk.NewDecFromInt(scalar)).TruncateInt().BigInt())
|
|
timePeriodsUint := sdk.NewUintFromBigInt(timePeriods.BigInt())
|
|
scalarUint := sdk.NewUintFromBigInt(scalar.BigInt())
|
|
// calculate the multiplier (amount to multiply the total supply by to achieve the desired inflation)
|
|
// multiply the result by 10^-18 because RelativePow returns the result scaled by 10^18
|
|
accumulator := sdk.NewDecFromBigInt(sdk.RelativePow(inflationInt, timePeriodsUint, scalarUint).BigInt()).Mul(sdk.SmallestDec())
|
|
// calculate the number of coins to mint
|
|
amountToMint := (sdk.NewDecFromInt(totalSupply.Amount).Mul(accumulator)).Sub(sdk.NewDecFromInt(totalSupply.Amount)).TruncateInt()
|
|
if amountToMint.IsZero() {
|
|
return nil
|
|
}
|
|
err := k.bankKeeper.MintCoins(ctx, types.KavaDistMacc, sdk.NewCoins(sdk.NewCoin(denom, amountToMint)))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
ctx.EventManager().EmitEvent(
|
|
sdk.NewEvent(
|
|
types.EventTypeKavaDist,
|
|
sdk.NewAttribute(types.AttributeKeyInflation, sdk.NewCoin(denom, amountToMint).String()),
|
|
),
|
|
)
|
|
|
|
return nil
|
|
}
|