plugeth/core/gaspool.go
rjl493456442 77e33e5a49
core, miner: revert block gas counter in case of invalid transaction (#26799)
This change fixes a flaw where, in certain scenarios, the block sealer did not accurately reset the remaining gas after failing to include an invalid transaction. Fixes #26791
2023-03-07 05:23:52 -05:00

60 lines
1.7 KiB
Go

// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package core
import (
"fmt"
"math"
)
// GasPool tracks the amount of gas available during execution of the transactions
// in a block. The zero value is a pool with zero gas available.
type GasPool uint64
// AddGas makes gas available for execution.
func (gp *GasPool) AddGas(amount uint64) *GasPool {
if uint64(*gp) > math.MaxUint64-amount {
panic("gas pool pushed above uint64")
}
*(*uint64)(gp) += amount
return gp
}
// SubGas deducts the given amount from the pool if enough gas is
// available and returns an error otherwise.
func (gp *GasPool) SubGas(amount uint64) error {
if uint64(*gp) < amount {
return ErrGasLimitReached
}
*(*uint64)(gp) -= amount
return nil
}
// Gas returns the amount of gas remaining in the pool.
func (gp *GasPool) Gas() uint64 {
return uint64(*gp)
}
// SetGas sets the amount of gas with the provided number.
func (gp *GasPool) SetGas(gas uint64) {
*(*uint64)(gp) = gas
}
func (gp *GasPool) String() string {
return fmt.Sprintf("%d", *gp)
}