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