github.com/neatio-net/neatio@v1.7.3-0.20231114194659-f4d7a2226baa/chain/core/vm/gas.go (about)

     1  package vm
     2  
     3  import (
     4  	"math/big"
     5  )
     6  
     7  const (
     8  	GasQuickStep   uint64 = 2
     9  	GasFastestStep uint64 = 3
    10  	GasFastStep    uint64 = 5
    11  	GasMidStep     uint64 = 8
    12  	GasSlowStep    uint64 = 10
    13  	GasExtStep     uint64 = 20
    14  )
    15  
    16  func callGas(isEip150 bool, availableGas, base uint64, callCost *big.Int) (uint64, error) {
    17  	if isEip150 {
    18  		availableGas = availableGas - base
    19  		gas := availableGas - availableGas/64
    20  
    21  		if !callCost.IsUint64() || gas < callCost.Uint64() {
    22  			return gas, nil
    23  		}
    24  	}
    25  	if !callCost.IsUint64() {
    26  		return 0, errGasUintOverflow
    27  	}
    28  
    29  	return callCost.Uint64(), nil
    30  }