instructions.go

// Copyright Turing Corp. 2018 All Rights Reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package runtime

import (
	"fmt"

	"github.com/turingchain2020/turingchain/common/log/log15"
	"github.com/turingchain2020/plugin/plugin/dapp/evm/executor/vm/common"
	"github.com/turingchain2020/plugin/plugin/dapp/evm/executor/vm/common/crypto"
	"github.com/turingchain2020/plugin/plugin/dapp/evm/executor/vm/model"
	"github.com/turingchain2020/plugin/plugin/dapp/evm/executor/vm/params"
	"github.com/holiman/uint256"
)

// 加法操作
func opAdd(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	y.Add(&x, y)
	return nil, nil
}

// 减法操作
func opSub(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	y.Sub(&x, y)
	return nil, nil
}

// 乘法操作
func opMul(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	y.Mul(&x, y)
	return nil, nil
}

// 除法操作
func opDiv(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	y.Div(&x, y)
	return nil, nil
}

// 除法操作（带符号）
func opSdiv(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	y.SDiv(&x, y)
	return nil, nil
}

// 两数取模
func opMod(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	y.Mod(&x, y)
	return nil, nil
}

// 两数取模（带符号）
func opSmod(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	y.SMod(&x, y)
	return nil, nil
}

// 指数操作
func opExp(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	base, exponent := callContext.stack.Pop(), callContext.stack.Peek()
	exponent.Exp(&base, exponent)
	return nil, nil
}

// 带符号扩展
func opSignExtend(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	back, num := callContext.stack.Pop(), callContext.stack.Peek()
	num.ExtendSign(num, &back)
	return nil, nil
}

// 取非
func opNot(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x := callContext.stack.Peek()
	x.Not(x)
	return nil, nil
}

// 小于判断
func opLt(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	if x.Lt(y) {
		y.SetOne()
	} else {
		y.Clear()
	}
	return nil, nil
}

// 大于判断
func opGt(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	if x.Gt(y) {
		y.SetOne()
	} else {
		y.Clear()
	}
	return nil, nil
}

// 小于判断（带符号）
func opSlt(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	if x.Slt(y) {
		y.SetOne()
	} else {
		y.Clear()
	}
	return nil, nil
}

// 判断两数是否相等（带符号）
func opSgt(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	if x.Sgt(y) {
		y.SetOne()
	} else {
		y.Clear()
	}
	return nil, nil
}

// 判断两数是否相等
func opEq(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	if x.Eq(y) {
		y.SetOne()
	} else {
		y.Clear()
	}
	return nil, nil
}

// 判断指定数是否为0
func opIszero(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x := callContext.stack.Peek()
	if x.IsZero() {
		x.SetOne()
	} else {
		x.Clear()
	}
	return nil, nil
}

// 与操作
func opAnd(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	y.And(&x, y)
	return nil, nil
}

// 或操作
func opOr(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	y.Or(&x, y)
	return nil, nil
}

// 异或操作
func opXor(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y := callContext.stack.Pop(), callContext.stack.Peek()
	y.Xor(&x, y)
	return nil, nil
}

// 获取指定数据中指定位的byte值
func opByte(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	th, val := callContext.stack.Pop(), callContext.stack.Peek()
	val.Byte(&th)
	return nil, nil
}

// 两数相加，并和第三数求模
func opAddmod(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y, z := callContext.stack.Pop(), callContext.stack.Pop(), callContext.stack.Peek()
	if z.IsZero() {
		z.Clear()
	} else {
		z.AddMod(&x, &y, z)
	}
	return nil, nil
}

// 两数相乘，并和第三数求模
func opMulmod(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x, y, z := callContext.stack.Pop(), callContext.stack.Pop(), callContext.stack.Peek()
	z.MulMod(&x, &y, z)
	return nil, nil
}

// 左移位操作：
// 操作弹出x和y，将y向左移x位，并将结果入栈
func opSHL(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	// Note, second operand is left in the stack; accumulate result into it, and no need to push it afterwards
	shift, value := callContext.stack.Pop(), callContext.stack.Peek()
	if shift.LtUint64(256) {
		value.Lsh(value, uint(shift.Uint64()))
	} else {
		value.Clear()
	}

	return nil, nil
}

// 右移位操作：
// 操作弹出x和y，将y向右移x位，并将结果入栈 （左边的空位用0填充）
func opSHR(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	// Note, second operand is left in the stack; accumulate result into it, and no need to push it afterwards
	shift, value := callContext.stack.Pop(), callContext.stack.Peek()
	if shift.LtUint64(256) {
		value.Rsh(value, uint(shift.Uint64()))
	} else {
		value.Clear()
	}

	return nil, nil
}

// 右移位操作：
// 操作弹出x和y，将y向右移x位，并将结果入栈 （左边的空位用左边第一位的符号位填充）
func opSAR(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	shift, value := callContext.stack.Pop(), callContext.stack.Peek()
	if shift.GtUint64(256) {
		if value.Sign() >= 0 {
			value.Clear()
		} else {
			// Max negative shift: all bits set
			value.SetAllOne()
		}
		return nil, nil
	}
	n := uint(shift.Uint64())
	value.SRsh(value, n)

	return nil, nil
}

//使用keccak256进行哈希运算
func opSha3(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	offset, size := callContext.stack.Pop(), callContext.stack.Peek()
	data := callContext.memory.GetPtr(int64(offset.Uint64()), int64(size.Uint64()))
	hash := crypto.Keccak256(data)

	if evm.VMConfig.EnablePreimageRecording {
		evm.StateDB.AddPreimage(common.BytesToHash(hash), data)
	}
	size.SetBytes(hash)
	return nil, nil
}

// 获取合约地址
func opAddress(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	callContext.stack.Push(new(uint256.Int).SetBytes(callContext.contract.Address().Bytes()))
	return nil, nil
}

// 获取指定地址的账户余额
func opBalance(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	//采用新的库unint256.Int
	slot := callContext.stack.Peek()
	address := common.Uint256ToAddress(slot)
	slot.SetUint64(evm.StateDB.GetBalance(address.String()))
	return nil, nil
}

// 获取合约调用者地址
func opOrigin(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	callContext.stack.Push(new(uint256.Int).SetBytes(evm.Origin.Bytes()))
	return nil, nil
}

// 获取合约的调用者（最终的外部账户地址）
func opCaller(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	callContext.stack.Push(new(uint256.Int).SetBytes(callContext.contract.Caller().Bytes()))
	return nil, nil
}

// 获取调用合约的同时，进行转账操作的额度
func opCallValue(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	callContext.stack.Push(new(uint256.Int).SetUint64(callContext.contract.value))
	return nil, nil
}

// 从调用合约的入参中获取数据
func opCallDataLoad(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	x := callContext.stack.Peek()
	if offset, overflow := x.Uint64WithOverflow(); !overflow {
		data := common.GetData(callContext.contract.Input, offset, 32)
		x.SetBytes(data)
	} else {
		x.Clear()
	}
	return nil, nil
}

// 获取调用合约时的入参长度
func opCallDataSize(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	callContext.stack.Push(new(uint256.Int).SetUint64(uint64(len(callContext.contract.Input))))
	return nil, nil
}

// 将调用合约时的入参写入内存
func opCallDataCopy(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	var (
		memOffset  = callContext.stack.Pop()
		dataOffset = callContext.stack.Pop()
		length     = callContext.stack.Pop()
	)
	dataOffset64, overflow := dataOffset.Uint64WithOverflow()
	if overflow {
		dataOffset64 = 0xffffffffffffffff
	}
	// These values are checked for overflow during gas cost calculation
	memOffset64 := memOffset.Uint64()
	length64 := length.Uint64()
	callContext.memory.Set(memOffset64, length64, common.GetData(callContext.contract.Input, dataOffset64, length64))
	return nil, nil
}

// 获取合约执行返回结果的大小
func opReturnDataSize(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	callContext.stack.Push(new(uint256.Int).SetUint64(uint64(len(evm.Interpreter.ReturnData))))
	return nil, nil
}

// 将合约执行的返回结果复制到内存
func opReturnDataCopy(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	var (
		memOffset  = callContext.stack.Pop()
		dataOffset = callContext.stack.Pop()
		length     = callContext.stack.Pop()
	)

	offset64, overflow := dataOffset.Uint64WithOverflow()
	if overflow {
		return nil, model.ErrReturnDataOutOfBounds
	}
	// we can reuse dataOffset now (aliasing it for clarity)
	var end = dataOffset
	end.Add(&dataOffset, &length)
	end64, overflow := end.Uint64WithOverflow()
	if overflow || uint64(len(evm.Interpreter.ReturnData)) < end64 {
		return nil, model.ErrReturnDataOutOfBounds
	}
	err := callContext.memory.Set(memOffset.Uint64(), length.Uint64(), evm.Interpreter.ReturnData[offset64:end64])
	if err != nil {
		panic(err)
	}
	return nil, nil
}

// 获取指定合约地址的合约代码大小
func opExtCodeSize(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	slot := callContext.stack.Peek()
	address := common.Uint256ToAddress(slot)
	slot.SetUint64(uint64(evm.StateDB.GetCodeSize(address.String())))
	return nil, nil
}

// 获取合约代码大小
func opCodeSize(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	l := new(uint256.Int)
	l.SetUint64(uint64(len(callContext.contract.Code)))
	callContext.stack.Push(l)
	return nil, nil
}

// 蒋合约中指定位置的数据复制到内存中
func opCodeCopy(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	var (
		memOffset  = callContext.stack.Pop()
		codeOffset = callContext.stack.Pop()
		length     = callContext.stack.Pop()
	)
	uint64CodeOffset, overflow := codeOffset.Uint64WithOverflow()
	if overflow {
		uint64CodeOffset = 0xffffffffffffffff
	}
	codeCopy := common.GetData(callContext.contract.Code, uint64CodeOffset, length.Uint64())
	if merr := callContext.memory.Set(memOffset.Uint64(), length.Uint64(), codeCopy); merr != nil {
		return nil, merr
	}
	return nil, nil
}

// 蒋指定合约中指定位置的数据复制到内存中
func opExtCodeCopy(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	var (
		stack      = callContext.stack
		a          = stack.Pop()
		memOffset  = stack.Pop()
		codeOffset = stack.Pop()
		length     = stack.Pop()
	)
	uint64CodeOffset, overflow := codeOffset.Uint64WithOverflow()
	if overflow {
		uint64CodeOffset = 0xffffffffffffffff
	}
	addr := common.Uint256ToAddress(&a)
	codeCopy := common.GetData(evm.StateDB.GetCode(addr.String()), uint64CodeOffset, length.Uint64())
	if merr := callContext.memory.Set(memOffset.Uint64(), length.Uint64(), codeCopy); merr != nil {
		return nil, merr
	}
	return nil, nil
}

// opExtCodeHash 返回指定账户的代码hash
func opExtCodeHash(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	slot := callContext.stack.Peek()
	addr := common.Uint256ToAddress(slot)
	if evm.StateDB.Empty(addr.String()) {
		slot.Clear()
	} else {
		slot.SetBytes(evm.StateDB.GetCodeHash(addr.String()).Bytes())
	}
	return nil, nil
}

// 获取当前区块的GasPrice
func opGasprice(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	v := uint256.NewInt().SetUint64(uint64(evm.GasPrice))
	callContext.stack.Push(v)
	return nil, nil
}

// 获取区块哈希
func opBlockhash(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	num := callContext.stack.Peek()
	num64, overflow := num.Uint64WithOverflow()
	if overflow {
		num.Clear()
		return nil, nil
	}
	var upper, lower uint64
	upper = evm.BlockNumber.Uint64()
	if upper < 257 {
		lower = 0
	} else {
		lower = upper - 256
	}
	if num64 >= lower && num64 < upper {
		num.SetBytes(evm.GetHash(num64).Bytes())
	} else {
		num.Clear()
	}
	return nil, nil
}

// 获取区块打包者地址
func opCoinbase(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	// 需要注意coinbase可能为空的情况，这时将返回合约的创建者作为coinbase
	if evm.Coinbase == nil {
		callContext.stack.Push(new(uint256.Int).SetBytes(callContext.contract.CallerAddress.Bytes()))
	} else {
		callContext.stack.Push(new(uint256.Int).SetBytes(evm.Coinbase.Bytes()))
	}
	return nil, nil
}

// 获取区块打包时间
func opTimestamp(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	v, _ := uint256.FromBig(evm.Time)
	callContext.stack.Push(v)
	return nil, nil
}

// 获取区块高度
func opNumber(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	v, _ := uint256.FromBig(evm.BlockNumber)
	callContext.stack.Push(v)
	return nil, nil
}

// 获取区块难度
func opDifficulty(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	v, _ := uint256.FromBig(evm.Difficulty)
	callContext.stack.Push(v)
	return nil, nil
}

// 获取GasLimit
func opGasLimit(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	callContext.stack.Push(new(uint256.Int).SetUint64(evm.GasLimit))
	return nil, nil
}

// 弹出栈顶数据
func opPop(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	callContext.stack.Pop()
	return nil, nil
}

// 加载内存中的数据
func opMload(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	v := callContext.stack.Peek()
	offset := int64(v.Uint64())
	v.SetBytes(callContext.memory.GetPtr(offset, 32))
	return nil, nil
}

// 写内存操作，每次写一个字长（32个字节）
func opMstore(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	// 从栈中分别弹出内存偏移量和要设置的值
	// pop value of the stack
	mStart, val := callContext.stack.Pop(), callContext.stack.Pop()
	callContext.memory.Set32(mStart.Uint64(), &val)
	return nil, nil
}

// 写内存操作，每次写一个字节
func opMstore8(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	off, val := callContext.stack.Pop(), callContext.stack.Pop()
	callContext.memory.Store[off.Uint64()] = byte(val.Uint64())
	return nil, nil
}

// 加载合约状态数据
func opSload(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	loc := callContext.stack.Peek()
	hash := common.BytesToHash(loc.Bytes())
	val := evm.StateDB.GetState(callContext.contract.Address().String(), hash)
	loc.SetBytes(val.Bytes())

	return nil, nil
}

// 写合约状态数据
func opSstore(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	loc := callContext.stack.Pop()
	val := callContext.stack.Pop()
	//适配evm中hash
	evm.StateDB.SetState(callContext.contract.Address().String(),
		common.BytesToHash(loc.Bytes()), common.BytesToHash(val.Bytes()))
	return nil, nil
}

// 无条件跳转操作
func opJump(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	pos := callContext.stack.Pop()
	contract := callContext.contract
	if !contract.Jumpdests.Has(contract.CodeHash, contract.Code, &pos) {
		nop := contract.GetOp(pos.Uint64())
		return nil, fmt.Errorf("invalid jump destination (%v) %v", nop, pos)
	}
	*pc = pos.Uint64()
	return nil, nil
}

// 有条件跳转操作
func opJumpi(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	pos, cond := callContext.stack.Pop(), callContext.stack.Pop()
	if !cond.IsZero() {
		if !callContext.contract.validJumpdest(&pos) {
			return nil, model.ErrInvalidJump
		}
		*pc = pos.Uint64()
	} else {
		*pc++
	}
	return nil, nil
}

// 跳转目标位置
func opJumpdest(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	return nil, nil
}

func opBeginSub(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	return nil, model.ErrInvalidSubroutineEntry
}

func opJumpSub(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	if callContext.rstack.Len() >= 1023 {
		return nil, model.ErrReturnStackExceeded
	}
	pos := callContext.stack.Pop()
	if !pos.IsUint64() {
		return nil, model.ErrInvalidJump
	}
	posU64 := pos.Uint64()
	if !callContext.contract.validJumpSubdest(posU64) {
		return nil, model.ErrInvalidJump
	}
	callContext.rstack.Push(uint32(*pc))
	*pc = posU64 + 1
	return nil, nil
}
func opReturnSub(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	if callContext.rstack.Len() == 0 {
		return nil, model.ErrInvalidRetsub
	}
	// Other than the check that the return stack is not empty, there is no
	// need to validate the pc from 'returns', since we only ever push valid
	//values onto it via jumpsub.
	*pc = uint64(callContext.rstack.Pop()) + 1
	return nil, nil
}

// 将指令计数器指针当前的值写入整数池
func opPc(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	callContext.stack.Push(new(uint256.Int).SetUint64(*pc))
	return nil, nil
}

// 获取内存大小
func opMsize(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	callContext.stack.Push(new(uint256.Int).SetUint64(uint64(callContext.memory.Len())))
	return nil, nil
}

// 获取可用Gas
func opGas(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	callContext.stack.Push(new(uint256.Int).SetUint64(callContext.contract.Gas))
	return nil, nil
}

// 合约创建操作
func opCreate(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {

	// 从栈和内存中分别获取操作所需的参数
	var (
		value        = callContext.stack.Pop()
		offset, size = callContext.stack.Pop(), callContext.stack.Pop()
		input        = callContext.memory.Get(int64(offset.Uint64()), int64(size.Uint64()))
		gas          = callContext.contract.Gas
	)

	callContext.contract.UseGas(gas)
	stackvalue := size
	// 调用合约创建逻辑
	addr := crypto.RandomContractAddress()
	res, _, returnGas, suberr := evm.Create(callContext.contract, *addr, input, gas, "innerContract", "", "")

	// 出错时压栈0，否则压栈创建出来的合约对象的地址
	if suberr != nil && suberr != model.ErrCodeStoreOutOfGas {
		log15.Error("evm contract opCreate instruction error,value", suberr, value)
		stackvalue.Clear()
	} else {
		stackvalue.SetBytes(addr.Bytes())
	}
	callContext.stack.Push(&stackvalue)
	// 剩余的Gas再返还给合约对象
	callContext.contract.Gas += returnGas

	if suberr == model.ErrExecutionReverted {
		log15.Error("evm contract opCreate instruction error,value", suberr, value)
		return res, nil
	}
	return nil, nil
}

// 合约调用操作
func opCall(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	stack := callContext.stack
	// Pop gas. The actual gas in interpreter.evm.callGasTemp.
	// We can use this as a temporary value
	temp := stack.Pop()
	gas := evm.CallGasTemp
	// Pop other call parameters.
	addr, value, inOffset, inSize, retOffset, retSize := stack.Pop(), stack.Pop(), stack.Pop(), stack.Pop(), stack.Pop(), stack.Pop()
	toAddr := common.Uint256ToAddress(&addr)
	// Get the arguments from the memory.
	args := callContext.memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64()))
	log15.Info("evm contract opCall", "toAddr", toAddr.String(), "value:", value.Uint64())
	if !value.IsZero() {
		gas += params.CallStipend
	}
	// 注意，这里的处理比较特殊，出错情况下0压栈，正确情况下1压栈
	ret, _, returnGas, err := evm.Call(callContext.contract, toAddr, args, gas, value.Uint64())
	if err != nil {
		temp.Clear()
		log15.Error("evm contract opCall instruction error", "error", err)
	} else {
		temp.SetOne()
	}
	stack.Push(&temp)
	if err == nil || err == model.ErrExecutionReverted {
		callContext.memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
	}
	//剩余的Gas再返还给合约对象
	callContext.contract.Gas += returnGas
	return ret, nil
}

// 合约调用操作，
// 逻辑同opCall大致相同，仅调用evm的方法不同
func opCallCode(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	// Pop gas. The actual gas is in interpreter.evm.callGasTemp.
	stack := callContext.stack
	// We use it as a temporary value
	temp := stack.Pop()
	gas := evm.CallGasTemp
	// Pop other call parameters.
	addr, value, inOffset, inSize, retOffset, retSize := stack.Pop(), stack.Pop(), stack.Pop(), stack.Pop(), stack.Pop(), stack.Pop()
	toAddr := common.Uint256ToAddress(&addr)
	// Get arguments from the memory.
	args := callContext.memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64()))

	if !value.IsZero() {
		gas += params.CallStipend
	}
	ret, returnGas, err := evm.CallCode(callContext.contract, toAddr, args, gas, value.Uint64())
	if err != nil {
		temp.Clear()
		log15.Error("evm contract opCallCode instruction error", err)
	} else {
		temp.SetOne()
	}
	stack.Push(&temp)
	if err == nil || err == model.ErrExecutionReverted {
		callContext.memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
	}
	callContext.contract.Gas += returnGas
	return ret, nil
}

// 合约委托调用操作，
// 逻辑同opCall大致相同，仅调用evm的方法不同
func opDelegateCall(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	stack := callContext.stack
	// Pop gas. The actual gas is in interpreter.evm.callGasTemp.
	// We use it as a temporary value
	temp := stack.Pop()
	gas := evm.CallGasTemp
	// Pop other call parameters.
	addr, inOffset, inSize, retOffset, retSize := stack.Pop(), stack.Pop(), stack.Pop(), stack.Pop(), stack.Pop()
	toAddr := common.Uint256ToAddress(&addr)
	// Get arguments from the memory.
	args := callContext.memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64()))

	ret, returnGas, err := evm.DelegateCall(callContext.contract, toAddr, args, gas)
	if err != nil {
		temp.Clear()
		log15.Error("evm contract opDelegateCall instruction error", err)
	} else {
		temp.SetOne()
	}
	stack.Push(&temp)
	if err == nil || err == model.ErrExecutionReverted {
		callContext.memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
	}
	callContext.contract.Gas += returnGas
	return ret, nil
}

// 合约调用操作，
// 逻辑同opCall大致相同，仅调用evm的方法不同
func opStaticCall(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	// Pop gas. The actual gas is in interpreter.evm.callGasTemp.
	stack := callContext.stack
	// We use it as a temporary value
	temp := stack.Pop()
	gas := evm.CallGasTemp
	// Pop other call parameters.
	addr, inOffset, inSize, retOffset, retSize := stack.Pop(), stack.Pop(), stack.Pop(), stack.Pop(), stack.Pop()
	toAddr := common.Uint256ToAddress(&addr)
	// Get arguments from the memory.
	args := callContext.memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64()))

	ret, returnGas, err := evm.StaticCall(callContext.contract, toAddr, args, gas)
	if err != nil {
		temp.Clear()
		log15.Error("evm contract opDelegateCall instruction error", err)
	} else {
		temp.SetOne()
	}
	stack.Push(&temp)
	if err == nil || err == model.ErrExecutionReverted {
		callContext.memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
	}
	callContext.contract.Gas += returnGas
	return ret, nil
}

// 返回操作
func opReturn(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	offset, size := callContext.stack.Pop(), callContext.stack.Pop()
	ret := callContext.memory.GetPtr(int64(offset.Uint64()), int64(size.Uint64()))
	return ret, nil
}

// 恢复操作
func opRevert(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	offset, size := callContext.stack.Pop(), callContext.stack.Pop()
	ret := callContext.memory.GetPtr(int64(offset.Uint64()), int64(size.Uint64()))
	return ret, nil
}

// 停止操作
func opStop(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	return nil, nil
}

// 自毁操作
func opSuicide(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	beneficiary := callContext.stack.Pop()
	balance := evm.StateDB.GetBalance(callContext.contract.Address().String())
	// 合约自毁后，将剩余金额返还给创建者
	evm.StateDB.AddBalance(common.Uint256ToAddress(&beneficiary).String(), (*callContext.contract.CodeAddr).String(), balance)
	evm.StateDB.Suicide(callContext.contract.Address().String())
	return nil, nil
}

// 生成创建日志的操作的方法：
// 生成的方法允许在合约执行时，创建N条日志写入StateDB；
// 在合约执行完成后，这些日志会打印出来（目前不会存储）
func makeLog(size int) ExecutionFunc {
	return func(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
		topics := make([]common.Hash, size)
		stack := callContext.stack
		mStart, mSize := stack.Pop(), stack.Pop()
		for i := 0; i < size; i++ {
			addr := stack.Pop()
			topics[i] = common.Uint256ToHash(&addr)
		}

		d := callContext.memory.Get(int64(mStart.Uint64()), int64(mSize.Uint64()))
		evm.StateDB.AddLog(&model.ContractLog{
			Address: callContext.contract.Address(),
			Topics:  topics,
			Data:    d,
			// This is a non-consensus field, but assigned here because
			// core/state doesn't know the current block number.
			//BlockNumber: evm.BlockNumber.Uint64(),
		})
		return nil, nil
	}
}

// opPush1 is a specialized version of pushN
func opPush1(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	var (
		codeLen = uint64(len(callContext.contract.Code))
		integer = new(uint256.Int)
	)
	*pc++
	if *pc < codeLen {
		callContext.stack.Push(integer.SetUint64(uint64(callContext.contract.Code[*pc])))
	} else {
		callContext.stack.Push(integer.Clear())
	}
	return nil, nil
}

// 生成PUSHN操作的方法，支持PUSH1-PUSH32
// 此操作可以讲合约中的数据进行压栈
func makePush(size uint64, pushByteSize int) ExecutionFunc {
	return func(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
		codeLen := len(callContext.contract.Code)

		startMin := codeLen
		if int(*pc+1) < startMin {
			startMin = int(*pc + 1)
		}

		endMin := codeLen
		if startMin+pushByteSize < endMin {
			endMin = startMin + pushByteSize
		}

		integer := new(uint256.Int)
		callContext.stack.Push(integer.SetBytes(common.RightPadBytes(
			callContext.contract.Code[startMin:endMin], pushByteSize)))

		*pc += size
		return nil, nil
	}
}

// 生成DUP操作，可以讲栈中指定位置数据复制并压栈
func makeDup(size int64) ExecutionFunc {
	return func(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
		callContext.stack.Dup(int(size))
		return nil, nil
	}
}

// 生成SWAP操作，将指定位置的数据和栈顶数据互换位置
func makeSwap(size int64) ExecutionFunc {
	// switch n + 1 otherwise n would be swapped with n
	size++
	return func(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
		callContext.stack.Swap(int(size))
		return nil, nil
	}
}

// 获取自身余额
func opSelfBalance(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
	balance := uint256.NewInt().SetUint64(evm.StateDB.GetBalance(callContext.contract.Address().String()))
	callContext.stack.Push(balance)
	return nil, nil
}

// opChainID implements CHAINID opcode
//func opChainID(pc *uint64, evm *EVM, callContext *callCtx) ([]byte, error) {
//	chainId, _ := uint256.FromBig(evm.ChainConfig.ChainID)
//	callContext.stack.Push(chainId)
//	return nil, nil
//}