vm

type AccountRef entity.Address

type BlockContext struct {
	//判断是否有足够的gas转账
	CanTransfer CanTransferFunc
	//转账
	Transfer TransferFunc
	// 获取hash
	GetHash GetHashFunc

	// 区块信息
	Coinbase    entity.Address
	GasLimit    uint64
	BlockNumber *big.Int
	Time        *big.Int
	Difficulty  *big.Int
	BaseFee     *big.Int
	Random      *entity.Hash
}

type CanTransferFunc func(*operationdb.OperationDB, entity.Address, *big.Int) bool

type ChainContext interface {
	// 共识引擎
	Engine() consensus.Engine

	// 返回其对应hash
	GetHeader(entity.Hash, uint64) *block2.Header
}

type Config struct {
	Debug bool // 启用调试
	//Tracer                  EVMLogger // 操作码日志
	NoBaseFee               bool // 强制将费用设置为0
	EnablePreimageRecording bool // 是否运行录制sha3前录像

	JumpTable *JumpTable // 虚拟机指令表，未设置自动填充

	ExtraEips []int // 其他eip
}

type Contract struct {
	// CallerAddress是初始化此合同的呼叫者的结果
	CallerAddress entity.Address

	Code     []byte
	CodeHash entity.Hash
	CodeAddr *entity.Address
	Input    []byte

	Gas uint64
	// contains filtered or unexported fields
}

type ContractRef interface {
	Address() entity.Address
}

type ErrInvalidOpCode struct {
	// contains filtered or unexported fields
}

type ErrStackOverflow struct {
	// contains filtered or unexported fields
}

type ErrStackUnderflow struct {
	// contains filtered or unexported fields
}

type GetHashFunc func(uint64) entity.Hash

type JumpTable [256]*operation

type Memory struct {
	// contains filtered or unexported fields
}

type OVM struct {
	// 区块配置信息
	Context BlockContext
	TxContext
	// 操作数据库访问配置
	Operationdb *operationdb.OperationDB

	// 初始化虚拟机配置选项
	Config Config
	// contains filtered or unexported fields
}

type OVMInterpreter struct {
	// contains filtered or unexported fields
}

type OVMLogger interface {
	// Transaction level
	CaptureTxStart(gasLimit uint64)
	CaptureTxEnd(restGas uint64)
	// Top call frame
	CaptureStart(env *OVM, from entity.Address, to entity.Address, create bool, input []byte, gas uint64, value *big.Int)
	CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error)
	// Rest of call frames
	CaptureEnter(typ OpCode, from entity.Address, to entity.Address, input []byte, gas uint64, value *big.Int)
	CaptureExit(output []byte, gasUsed uint64, err error)
	// Opcode level
	CaptureState(pc uint64, op OpCode, gas, cost uint64, scope *ScopeContext, rData []byte, depth int, err error)
	CaptureFault(pc uint64, op OpCode, gas, cost uint64, scope *ScopeContext, depth int, err error)
}

type OpCode byte

type Operationdb interface {
	CreateAccount(entity.Address)

	SubBalance(entity.Address, *big.Int)
	AddBalance(entity.Address, *big.Int)
	GetBalance(entity.Address) *big.Int

	GetNonce(entity.Address) uint64
	SetNonce(entity.Address, uint64)

	GetCodeHash(entity.Address) entity.Hash
	GetCode(entity.Address) []byte
	SetCode(entity.Address, []byte)
	GetCodeSize(entity.Address) int

	AddRefund(uint64)
	SubRefund(uint64)
	GetRefund() uint64

	GetCommittedState(entity.Address, entity.Hash) entity.Hash
	GetState(entity.Address, entity.Hash) entity.Hash
	SetState(entity.Address, entity.Hash, entity.Hash)

	Suicide(entity.Address) bool
	HasSuicided(entity.Address) bool

	// Exist报告给定帐户是否存在于状态。值得注意的是，对于自杀账户，这也应该是真的。
	Exist(entity.Address) bool
	// Empty返回给定帐户是否为空。根据EIP161定义为空（余额=nonce=代码=0）。
	Empty(entity.Address) bool

	//PrepareAccessList（发送方区块链地址，目的地*区块链地址，预编译[]区块链地址，TXAccess数据库访问列表）
	AddressInAccessList(addr entity.Address) bool
	SlotInAccessList(addr entity.Address, slot entity.Hash) (addressOk bool, slotOk bool)
	// AddAddressToAccessList将给定地址添加到访问列表中。即使功能/分叉尚未激活，也可以安全执行此操作
	AddAddressToAccessList(addr entity.Address)
	// AddSlotToAccessList将给定的（地址、插槽）添加到访问列表中。即使功能/分叉尚未激活，也可以安全执行此操作
	AddSlotToAccessList(addr entity.Address, slot entity.Hash)

	RevertToSnapshot(int)
	Snapshot() int

	AddLog(*block2.Log)
	AddPreimage(entity.Hash, []byte)

	ForEachStorage(entity.Address, func(entity.Hash, entity.Hash) bool) error
}

type PrecompiledContract interface {
	RequiredGas(input []byte) uint64  // RequiredPrice calculates the contract gas use
	Run(input []byte) ([]byte, error) // Run runs the precompiled contract
}

type ScopeContext struct {
	Memory   *Memory
	Stack    *Stack
	Contract *Contract
}

type Stack struct {
	// contains filtered or unexported fields
}

type TransferFunc func(*operationdb.OperationDB, entity.Address, entity.Address, *big.Int)

type TxContext struct {
	Origin   entity.Address
	GasPrice *big.Int
}