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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/cosmos/cosmos-sdk/x/mint/keeper"
"github.com/cosmos/cosmos-sdk/x/mint/types"
)
// BeginBlocker mints new tokens for the previous block.
func BeginBlocker(ctx sdk.Context, k keeper.Keeper, ic types.InflationCalculationFn) {
defer telemetry.ModuleMeasureSince(types.ModuleName, time.Now(), telemetry.MetricKeyBeginBlocker)
// fetch stored minter & params
minter := k.GetMinter(ctx)
params := k.GetParams(ctx)
// recalculate inflation rate
totalStakingSupply := k.StakingTokenSupply(ctx)
bondedRatio := k.BondedRatio(ctx)
minter.Inflation = ic(ctx, minter, params, bondedRatio)
minter.AnnualProvisions = minter.NextAnnualProvisions(params, totalStakingSupply)
k.SetMinter(ctx, minter)
// mint coins, update supply
mintedCoin := minter.BlockProvision(params)
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(types.AttributeKeyBondedRatio, bondedRatio.String()),
sdk.NewAttribute(types.AttributeKeyInflation, minter.Inflation.String()),
sdk.NewAttribute(types.AttributeKeyAnnualProvisions, minter.AnnualProvisions.String()),
sdk.NewAttribute(sdk.AttributeKeyAmount, mintedCoin.Amount.String()),
),
)
}