From 79b1169a9ff0b54ddf3b520a70a79c78ba5c988d Mon Sep 17 00:00:00 2001 From: Determinant Date: Mon, 21 Oct 2019 14:47:51 -0400 Subject: customize Blockchain code --- core/gaspool.go | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 core/gaspool.go (limited to 'core/gaspool.go') diff --git a/core/gaspool.go b/core/gaspool.go new file mode 100644 index 0000000..e3795c1 --- /dev/null +++ b/core/gaspool.go @@ -0,0 +1,54 @@ +// 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 . + +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) +} + +func (gp *GasPool) String() string { + return fmt.Sprintf("%d", *gp) +} -- cgit v1.2.3