Fantom-foundation/go-lachesis

package params

import (
    "github.com/ethereum/go-ethereum/params"
)

// gas settings
const (
    // MaxGasPowerUsed - max value of Gas Power used in one event
    MaxGasPowerUsed = 10000000 + EventGas
    MaxExtraData    = 128 // it has fair gas cost, so it's fine to have a high limit

    EventGas  = 28000
    ParentGas = 2400
    // ExtraDataGas is cost per byte of extra event data. It's higher than regular data price, because it's a part of the header
    ExtraDataGas = 150

    TxGas = params.TxGas
)

func MaxGasLimit() uint64 {
    maxEmptyEventGas := EventGas +
        7*ParentGas +
        uint64(MaxExtraData)*ExtraDataGas
    if MaxGasPowerUsed < maxEmptyEventGas {
        return 0
    }
    return MaxGasPowerUsed - maxEmptyEventGas
}