From 020c8a477578cef3764b54f33d9ca0cf6caf7631 Mon Sep 17 00:00:00 2001
From: JM <jm@dexon.org>
Date: Tue, 15 Jan 2019 23:33:28 +0800
Subject: core: vm: refactor file structure (#151)

For support other vm types, this pr modified the core/vm file
structures.
---
 core/vm/gas.go | 59 ----------------------------------------------------------
 1 file changed, 59 deletions(-)
 delete mode 100644 core/vm/gas.go

(limited to 'core/vm/gas.go')

diff --git a/core/vm/gas.go b/core/vm/gas.go
deleted file mode 100644
index 52c3b02f1..000000000
--- a/core/vm/gas.go
+++ /dev/null
@@ -1,59 +0,0 @@
-// 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 vm
-
-import (
-	"math/big"
-
-	"github.com/dexon-foundation/dexon/params"
-)
-
-// Gas costs
-const (
-	GasQuickStep   uint64 = 2
-	GasFastestStep uint64 = 3
-	GasFastStep    uint64 = 5
-	GasMidStep     uint64 = 8
-	GasSlowStep    uint64 = 10
-	GasExtStep     uint64 = 20
-
-	GasReturn       uint64 = 0
-	GasStop         uint64 = 0
-	GasContractByte uint64 = 200
-)
-
-// calcGas returns the actual gas cost of the call.
-//
-// The cost of gas was changed during the homestead price change HF. To allow for EIP150
-// to be implemented. The returned gas is gas - base * 63 / 64.
-func callGas(gasTable params.GasTable, availableGas, base uint64, callCost *big.Int) (uint64, error) {
-	if gasTable.CreateBySuicide > 0 {
-		availableGas = availableGas - base
-		gas := availableGas - availableGas/64
-		// If the bit length exceeds 64 bit we know that the newly calculated "gas" for EIP150
-		// is smaller than the requested amount. Therefor we return the new gas instead
-		// of returning an error.
-		if callCost.BitLen() > 64 || gas < callCost.Uint64() {
-			return gas, nil
-		}
-	}
-	if callCost.BitLen() > 64 {
-		return 0, errGasUintOverflow
-	}
-
-	return callCost.Uint64(), nil
-}
-- 
cgit v1.2.3