vm

package
v1.4.1 Latest Latest
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 Go to latest Published: May 23, 2019 License: MIT Imports: 12 Imported by: 3

Documentation

Index

Constants

View Source 
const (
	PushInt = iota
	PushBool
	PushChar
	PushStr
	Push
	Dup
	Roll
	Swap
	Pop
	Add
	Sub
	Mul
	Div
	Mod
	Exp
	Neg
	Eq
	NotEq
	Lt
	Gt
	LtEq
	GtEq
	ShiftL
	ShiftR
	BitwiseAnd
	BitwiseOr
	BitwiseXor
	BitwiseNot
	NoOp
	Jmp
	JmpTrue
	JmpFalse
	Call
	CallTrue
	CallExt
	Ret
	Size
	StoreLoc
	StoreSt
	LoadLoc
	LoadSt
	Address // Address of account
	Issuer  // Owner of smart contract account
	Balance // Balance of account
	Caller
	CallVal  // Amount of bazo coins transacted in transaction
	CallData // Parameters and function signature hash
	NewMap
	MapHasKey
	MapGetVal
	MapSetVal
	MapRemove
	NewArr
	ArrAppend
	ArrInsert
	ArrRemove
	ArrAt
	ArrLen
	NewStr
	StoreFld
	LoadFld
	SHA3
	CheckSig
	ErrHalt
	Halt
)

Supported Bazo OpCodes.

View Source 
const (
	BYTES = iota + 1
	BYTE
	LABEL
	ADDR
)

Supported OpCode argument types

View Source 
const UINT16_MAX uint16 = 65535

Variables

View Source 
var OpCodes = []OpCode{
	{PushInt, "pushint", 1, []int{BYTES}, 1, 1},
	{PushBool, "pushbool", 1, []int{BYTE}, 1, 1},
	{PushChar, "pushchar", 1, []int{BYTE}, 1, 1},
	{PushStr, "pushstr", 1, []int{BYTES}, 1, 1},
	{Push, "push", 1, []int{BYTES}, 1, 1},
	{Dup, "dup", 0, nil, 1, 2},
	{Roll, "roll", 1, []int{BYTE}, 1, 2},
	{Swap, "swap", 0, nil, 1, 2},
	{Pop, "pop", 0, nil, 1, 1},
	{Add, "add", 0, nil, 1, 2},
	{Sub, "sub", 0, nil, 1, 2},
	{Mul, "mult", 0, nil, 1, 2},
	{Div, "div", 0, nil, 1, 2},
	{Mod, "mod", 0, nil, 1, 2},
	{Exp, "exp", 0, nil, 1, 2},
	{Neg, "neg", 0, nil, 1, 2},
	{Eq, "eq", 0, nil, 1, 2},
	{NotEq, "neq", 0, nil, 1, 2},
	{Lt, "lt", 0, nil, 1, 2},
	{Gt, "gt", 0, nil, 1, 2},
	{LtEq, "lte", 0, nil, 1, 2},
	{GtEq, "gte", 0, nil, 1, 2},
	{ShiftL, "shiftl", 0, nil, 1, 2},
	{ShiftR, "shiftr", 0, nil, 1, 2},
	{BitwiseAnd, "bitwiseand", 0, nil, 1, 2},
	{BitwiseOr, "bitwiseor", 0, nil, 1, 2},
	{BitwiseXor, "bitwisexor", 0, nil, 1, 2},
	{BitwiseNot, "bitwisenot", 0, nil, 1, 2},
	{NoOp, "nop", 0, nil, 1, 1},
	{Jmp, "jmp", 1, []int{LABEL}, 1, 1},
	{JmpTrue, "jmptrue", 1, []int{LABEL}, 1, 1},
	{JmpFalse, "jmpfalse", 1, []int{LABEL}, 1, 1},
	{Call, "call", 2, []int{LABEL, BYTE}, 1, 1},
	{CallTrue, "callif", 2, []int{LABEL, BYTE}, 1, 1},
	{CallExt, "callext", 3, []int{ADDR, BYTE, BYTE, BYTE, BYTE, BYTE}, 1000, 2},
	{Ret, "ret", 0, nil, 1, 1},
	{Size, "size", 0, nil, 1, 1},
	{StoreLoc, "storeloc", 1, []int{BYTE}, 1, 2},
	{StoreSt, "storest", 1, []int{BYTE}, 1000, 2},
	{LoadLoc, "loadloc", 1, []int{BYTE}, 1, 2},
	{LoadSt, "loadst", 1, []int{BYTE}, 10, 2},
	{Address, "address", 0, nil, 1, 1},
	{Issuer, "issuer", 0, nil, 1, 1},
	{Balance, "balance", 0, nil, 1, 1},
	{Caller, "caller", 0, nil, 1, 1},
	{CallVal, "callval", 0, nil, 1, 1},
	{CallData, "calldata", 0, nil, 1, 1},
	{NewMap, "newmap", 0, nil, 1, 2},
	{MapHasKey, "maphaskey", 0, nil, 1, 2},
	{MapGetVal, "mapgetval", 0, nil, 1, 2},
	{MapSetVal, "mapsetval", 0, nil, 1, 2},
	{MapRemove, "mapremove", 0, nil, 1, 2},
	{NewArr, "newarr", 0, nil, 1, 2},
	{ArrAppend, "arrappend", 0, nil, 1, 2},
	{ArrInsert, "arrinsert", 0, nil, 1, 2},
	{ArrRemove, "arrremove", 0, nil, 1, 2},
	{ArrAt, "arrat", 0, nil, 1, 2},
	{ArrLen, "arrlen", 0, nil, 1, 2},
	{NewStr, "newstr", 1, []int{BYTE}, 1, 2},
	{StoreFld, "storefld", 1, []int{BYTE}, 1, 2},
	{LoadFld, "loadfld", 1, []int{BYTE}, 1, 2},
	{SHA3, "sha3", 0, nil, 1, 2},
	{CheckSig, "checksig", 0, nil, 1, 2},
	{ErrHalt, "errhalt", 0, nil, 0, 1},
	{Halt, "halt", 0, nil, 0, 1},
}

OpCodes contains all OpCode definitions

Functions

func BigIntToByteArray added in v1.4.1 

func BigIntToByteArray(value big.Int) []byte

func BigIntToPushableBytes 

func BigIntToPushableBytes(element big.Int) []byte

func BigIntToString 

func BigIntToString(element big.Int) string

func BigIntToUInt added in v1.4.1 

func BigIntToUInt(value big.Int) (uint, error)

func BigIntToUInt16 added in v1.4.1 

func BigIntToUInt16(value big.Int) (uint16, error)

func BoolToByteArray 

func BoolToByteArray(value bool) []byte

func ByteArrayToBool 

func ByteArrayToBool(ba []byte) bool

func ByteArrayToInt 

func ByteArrayToInt(element []byte) int

func ByteArrayToUI16 

func ByteArrayToUI16(element []byte) (uint16, error)

func SignedBigIntConversion 

func SignedBigIntConversion(ba []byte, err error) (big.Int, error)

func SignedByteArrayConversion 

func SignedByteArrayConversion(bi big.Int) []byte

func StrToBigInt 

func StrToBigInt(element string) big.Int

func UInt16ToBigInt added in v1.4.1 

func UInt16ToBigInt(value uint16) big.Int

func UInt16ToByteArray 

func UInt16ToByteArray(element uint16) []byte

func UInt64ToByteArray 

func UInt64ToByteArray(element uint64) []byte

func UnsignedBigIntConversion 

func UnsignedBigIntConversion(ba []byte, err error) (big.Int, error)

Types

type Array 

type Array []byte

func ArrayFromByteArray 

func ArrayFromByteArray(arr []byte) (Array, error)

func NewArray 

func NewArray() Array

func (*Array) Append 

func (a *Array) Append(ba []byte) error

func (*Array) At 

func (a *Array) At(index uint16) ([]byte, error)

func (*Array) DecrementSize 

func (a *Array) DecrementSize() error

func (*Array) GetSize added in v1.4.1 

func (a *Array) GetSize() (uint16, error)

func (*Array) IncrementSize 

func (a *Array) IncrementSize() error

func (*Array) Insert 

func (a *Array) Insert(index uint16, element []byte) error

Insert sets an element at a certain index of the array

func (*Array) Remove 

func (a *Array) Remove(index uint16) error

Remove removes the element with the given index from the array

type CallStack 

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

func NewCallStack 

func NewCallStack() *CallStack

func (CallStack) GetLength 

func (cs CallStack) GetLength() int

func (*CallStack) Peek 

func (cs *CallStack) Peek() (frame *Frame, err error)

func (*CallStack) Pop 

func (cs *CallStack) Pop() (frame *Frame, err error)

func (*CallStack) Push 

func (cs *CallStack) Push(element *Frame)

type Context 

type Context interface {
	GetContract() []byte
	GetContractVariable(index int) ([]byte, error)
	SetContractVariable(index int, value []byte) error
	GetAddress() [64]byte
	GetIssuer() [32]byte
	GetBalance() uint64
	GetSender() [32]byte
	GetAmount() uint64
	GetTransactionData() []byte
	GetFee() uint64
	GetSig1() [64]byte
}

Context is the VM execution context which is composed with data coming from the transaction and the account. Context interface declares functions required to start the execution of the contract.

type Frame 

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

type Map 

type Map []byte

func CreateMap added in v1.4.1 

func CreateMap() Map

func MapFromByteArray 

func MapFromByteArray(m []byte) (Map, error)

func (*Map) Append 

func (m *Map) Append(key []byte, value []byte) error

func (*Map) DecrementSize 

func (m *Map) DecrementSize() error

func (*Map) GetVal 

func (m *Map) GetVal(key []byte) ([]byte, error)

func (*Map) IncrementSize 

func (m *Map) IncrementSize()

func (*Map) MapContainsKey 

func (m *Map) MapContainsKey(key []byte) (bool, error)

func (*Map) Remove 

func (m *Map) Remove(key []byte) error

func (*Map) SetVal 

func (m *Map) SetVal(key []byte, value []byte) error

type MockContext 

type MockContext struct {
	protocol.Context
}

func NewMockContext 

func NewMockContext(byteCode []byte) *MockContext

func (*MockContext) SetContract 

func (mc *MockContext) SetContract(contract []byte)

type OpCode 

type OpCode struct {
	Name     string
	Nargs    int
	ArgTypes []int
	// contains filtered or unexported fields
}

OpCode contains the code, name, number of arguments, argument types, gas price and gas factor of the opcode

type Stack 

type Stack struct {
	Stack [][]byte
	// contains filtered or unexported fields
}

func NewStack 

func NewStack() *Stack

func (Stack) GetLength 

func (s Stack) GetLength() int

func (*Stack) PeekBytes 

func (s *Stack) PeekBytes() (element []byte, err error)

func (*Stack) Pop 

func (s *Stack) Pop() (element []byte, err error)

func (*Stack) PopIndexAt 

func (s *Stack) PopIndexAt(index int) ([]byte, error)

func (*Stack) Push 

func (s *Stack) Push(element []byte) error

type Struct added in v1.4.1 

type Struct Array

Struct type represents the composite data type declaration that defines a group of variables.

type VM 

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

VM is a stack-based virtual machine and executes the contract code sequentially.

func NewTestVM 

func NewTestVM(byteCode []byte) VM

NewTestVM creates a new Bazo virtual machine with the test contract code.

func NewVM 

func NewVM(context Context) VM

NewVM creates a new Bazo virtual machine with the context received from Bazo miner.

func (*VM) Exec 

func (vm *VM) Exec(trace bool) bool

Exec executes the contract code and stores the result on evaluation stack.

func (*VM) GetErrorMsg 

func (vm *VM) GetErrorMsg() string

GetErrorMsg peeks bytes from evaluation stack and returns the error message.

func (*VM) PeekEvalStack added in v1.4.1 

func (vm *VM) PeekEvalStack() [][]byte

PeekEvalStack returns a copy of the complete evaluation stack

func (*VM) PeekResult 

func (vm *VM) PeekResult() (element []byte, err error)

PeekResult returns the element on top of the stack

func (*VM) PopBytes 

func (vm *VM) PopBytes(opCode OpCode) (elements []byte, err error)

PopBytes pops bytes from the evaluation stack.

func (*VM) PopSignedBigInt 

func (vm *VM) PopSignedBigInt(opCode OpCode) (bigInt big.Int, err error)

PopSignedBigInt pops bytes from evaluation stack and convert it to a big integer with sign.

func (*VM) PopUnsignedBigInt 

func (vm *VM) PopUnsignedBigInt(opCode OpCode) (bigInt big.Int, err error)

PopUnsignedBigInt pops bytes from evaluation stack and convert it to an unsigned big integer.

Source Files

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