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abci.go
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abci.go
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package mint
import (
"time"
"github.com/cosmos/cosmos-sdk/telemetry"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmosquad-labs/squad/x/mint/keeper"
"github.com/cosmosquad-labs/squad/x/mint/types"
)
// BeginBlocker mints new tokens for the previous block.
func BeginBlocker(ctx sdk.Context, k keeper.Keeper) {
defer telemetry.ModuleMeasureSince(types.ModuleName, time.Now(), telemetry.MetricKeyBeginBlocker)
// fetch stored params
params := k.GetParams(ctx)
InflationSchedules := k.GetInflationSchedules()
blockInflation := sdk.ZeroInt()
for _, schedule := range InflationSchedules {
if !schedule.EndTime.Before(ctx.BlockTime()) && !schedule.StartTime.After(ctx.BlockTime()) {
lastBlockTime := k.GetLastBlockTime(ctx)
// if not set LastBlockTime(e.g. fist block), skip minting inflation
if lastBlockTime.Equal(time.Time{}) {
break
}
lastBlockTimeDiff := ctx.BlockTime().Sub(lastBlockTime)
if lastBlockTimeDiff > params.BlockTimeThreshold {
lastBlockTimeDiff = params.BlockTimeThreshold
}
// blockInflation = InflationAmountThisPeriod * min(CurrentBlockTime-LastBlockTime,BlockTimeThreshold)/(InflationPeriodEndDate-InflationPeriodStartDate)
blockInflation = schedule.Amount.MulRaw(lastBlockTimeDiff.Nanoseconds()).QuoRaw(schedule.EndTime.Sub(schedule.StartTime).Nanoseconds())
break
}
}
if blockInflation.IsPositive() {
mintedCoin := sdk.NewCoin(params.MintDenom, blockInflation)
mintedCoins := sdk.NewCoins(mintedCoin)
err := k.MintCoins(ctx, mintedCoins)
if err != nil {
panic(err)
}
// send the minted coins to the fee collector account
err = k.AddCollectedFees(ctx, mintedCoins)
if err != nil {
panic(err)
}
if mintedCoin.Amount.IsInt64() {
defer telemetry.ModuleSetGauge(types.ModuleName, float32(mintedCoin.Amount.Int64()), "minted_tokens")
}
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeMint,
sdk.NewAttribute(sdk.AttributeKeyAmount, mintedCoin.Amount.String()),
),
)
}
k.SetLastBlockTime(ctx, ctx.BlockTime())
}