68 lines
2.0 KiB
Go
68 lines
2.0 KiB
Go
package keeper
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import (
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"fmt"
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"github.com/evmos/ethermint/x/feemarket/types"
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abci "github.com/tendermint/tendermint/abci/types"
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"github.com/cosmos/cosmos-sdk/telemetry"
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sdk "github.com/cosmos/cosmos-sdk/types"
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)
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// BeginBlock updates base fee
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func (k *Keeper) BeginBlock(ctx sdk.Context, req abci.RequestBeginBlock) {
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baseFee := k.CalculateBaseFee(ctx)
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// return immediately if base fee is nil
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if baseFee == nil {
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return
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}
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k.SetBaseFee(ctx, baseFee)
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defer func() {
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telemetry.SetGauge(float32(baseFee.Int64()), "feemarket", "base_fee")
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}()
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// Store current base fee in event
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ctx.EventManager().EmitEvents(sdk.Events{
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sdk.NewEvent(
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types.EventTypeFeeMarket,
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sdk.NewAttribute(types.AttributeKeyBaseFee, baseFee.String()),
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),
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})
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}
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// EndBlock update block gas wanted.
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// The EVM end block logic doesn't update the validator set, thus it returns
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// an empty slice.
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func (k *Keeper) EndBlock(ctx sdk.Context, req abci.RequestEndBlock) {
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if ctx.BlockGasMeter() == nil {
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k.Logger(ctx).Error("block gas meter is nil when setting block gas wanted")
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return
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}
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gasWanted := k.GetTransientGasWanted(ctx)
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gasUsed := ctx.BlockGasMeter().GasConsumedToLimit()
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// to prevent BaseFee manipulation we limit the gasWanted so that
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// gasWanted = max(gasWanted * MinGasMultiplier, gasUsed)
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// this will be keep BaseFee protected from un-penalized manipulation
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// more info here https://github.com/evmos/ethermint/pull/1105#discussion_r888798925
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minGasMultiplier := k.GetParams(ctx).MinGasMultiplier
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limitedGasWanted := sdk.NewDec(int64(gasWanted)).Mul(minGasMultiplier)
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gasWanted = sdk.MaxDec(limitedGasWanted, sdk.NewDec(int64(gasUsed))).TruncateInt().Uint64()
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k.SetBlockGasWanted(ctx, gasWanted)
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defer func() {
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telemetry.SetGauge(float32(gasWanted), "feemarket", "block_gas")
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}()
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ctx.EventManager().EmitEvent(sdk.NewEvent(
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"block_gas",
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sdk.NewAttribute("height", fmt.Sprintf("%d", ctx.BlockHeight())),
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sdk.NewAttribute("amount", fmt.Sprintf("%d", gasWanted)),
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))
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}
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