common

package
v2.0.1-beta+incompatible Latest Latest
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 Go to latest Published: Jun 3, 2019 License: Apache-2.0 Imports: 14 Imported by: 0

Documentation

Overview

* Copyright (C) 2018 The DNA Authors * This file is part of The DNA library. * * The DNA 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 DNA 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 DNA. If not, see <http://www.gnu.org/licenses/>.

Index

Constants

View Source 
const (
	UINT16_SIZE  = 2
	UINT32_SIZE  = 4
	UINT64_SIZE  = 8
	UINT256_SIZE = 32
)
View Source 
const ADDR_LEN = 20
View Source 
const (
	Decimal = 100000000
)
View Source 
const (
	MAX_UINT64 = math.MaxUint64
)
View Source 
const MaxBase58AddrLen = 2048 // just to avoid dos

Variables

View Source 
var ADDRESS_EMPTY = Address{}
View Source 
var ErrIrregularData = errors.New("irregular data")
View Source 
var ErrTooLarge = errors.New("bytes.Buffer: too large")
View Source 
var ErrWriteExceedLimitedCount = errors.New("writer exceed limited count")
View Source 
var UINT256_EMPTY = Uint256{}

Functions

func BigIntFromNeoBytes 

func BigIntFromNeoBytes(ba []byte) *big.Int

func BigIntToNeoBytes 

func BigIntToNeoBytes(data *big.Int) []byte

neo encoding: https://docs.microsoft.com/en-us/dotnet/api/system.numerics.biginteger.tobytearray?view=netframework-4.7.2

func FileExisted 

func FileExisted(filename string) bool

FileExisted checks whether filename exists in filesystem

func GetNonce 

func GetNonce() uint64

GetNonce returns random nonce

func HexToBytes 

func HexToBytes(value string) ([]byte, error)

HexToBytes convert hex string to []byte

func SafeAdd 

func SafeAdd(x, y uint64) (uint64, bool)

func SafeMul 

func SafeMul(x, y uint64) (uint64, bool)

func SafeSub 

func SafeSub(x, y uint64) (uint64, bool)

func ToArrayReverse 

func ToArrayReverse(arr []byte) []byte

func ToHexString 

func ToHexString(data []byte) string

ToHexString convert []byte to hex string

Types

type Address 

type Address [ADDR_LEN]byte

func AddressFromBase58 

func AddressFromBase58(encoded string) (Address, error)

AddressFromBase58 returns Address from encoded base58 string

func AddressFromHexString 

func AddressFromHexString(s string) (Address, error)

AddressParseFromHexString returns parsed Address

func AddressFromVmCode 

func AddressFromVmCode(code []byte) Address

func AddressParseFromBytes 

func AddressParseFromBytes(f []byte) (Address, error)

AddressParseFromBytes returns parsed Address

func (*Address) Deserialize 

func (self *Address) Deserialize(r io.Reader) error

Deserialize deserialize Address from io.Reader

func (*Address) Serialize 

func (self *Address) Serialize(w io.Writer) error

Serialize serialize Address into io.Writer

func (*Address) ToBase58 

func (f *Address) ToBase58() string

ToBase58 returns base58 encoded address string

func (*Address) ToHexString 

func (self *Address) ToHexString() string

ToHexString returns hex string representation of Address

type Fixed64 

type Fixed64 int64

the 64 bit fixed-point number, precise 10^-8

func FromDecimal 

func FromDecimal(value int64) Fixed64

func (*Fixed64) Deserialization 

func (f *Fixed64) Deserialization(source *ZeroCopySource) error

func (Fixed64) GetData 

func (f Fixed64) GetData() int64

func (*Fixed64) Serialization 

func (f *Fixed64) Serialization(sink *ZeroCopySink)

func (Fixed64) String 

func (f Fixed64) String() string

type Inventory 

type Inventory interface {
	//sig.SignableData
	Hash() Uint256
	Verify() error
	Type() InventoryType
}

TODO: temp inventory

type InventoryType 

type InventoryType byte
const (
	TRANSACTION InventoryType = 0x01
	BLOCK       InventoryType = 0x02
	CONSENSUS   InventoryType = 0xe0
)

type LimitedWriter 

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

func NewLimitedWriter 

func NewLimitedWriter(w io.Writer, max uint64) *LimitedWriter

func (*LimitedWriter) Count 

func (self *LimitedWriter) Count() uint64

Count function return counted bytes

func (*LimitedWriter) Write 

func (self *LimitedWriter) Write(buf []byte) (int, error)

type Uint256 

type Uint256 [UINT256_SIZE]byte

func ComputeMerkleRoot 

func ComputeMerkleRoot(hashes []Uint256) Uint256

param hashes will be used as workspace

func Uint256FromHexString 

func Uint256FromHexString(s string) (Uint256, error)

func Uint256ParseFromBytes 

func Uint256ParseFromBytes(f []byte) (Uint256, error)

func (*Uint256) Deserialize 

func (u *Uint256) Deserialize(r io.Reader) error

func (*Uint256) Serialize 

func (u *Uint256) Serialize(w io.Writer) error

func (*Uint256) ToArray 

func (u *Uint256) ToArray() []byte

func (*Uint256) ToHexString 

func (u *Uint256) ToHexString() string

type ZeroCopySink 

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

func NewZeroCopySink 

func NewZeroCopySink(b []byte) *ZeroCopySink

NewReader returns a new ZeroCopySink reading from b.

func (*ZeroCopySink) BackUp 

func (self *ZeroCopySink) BackUp(n uint64)

Backs up a number of bytes, so that the next call to NextXXX() returns data again that was already returned by the last call to NextXXX().

func (*ZeroCopySink) Bytes 

func (self *ZeroCopySink) Bytes() []byte

func (*ZeroCopySink) NextBytes 

func (self *ZeroCopySink) NextBytes(n uint64) (data []byte)

func (*ZeroCopySink) Reset 

func (self *ZeroCopySink) Reset()

func (*ZeroCopySink) Size 

func (self *ZeroCopySink) Size() uint64

func (*ZeroCopySink) WriteAddress 

func (self *ZeroCopySink) WriteAddress(addr Address)

func (*ZeroCopySink) WriteBool 

func (self *ZeroCopySink) WriteBool(data bool)

func (*ZeroCopySink) WriteByte 

func (self *ZeroCopySink) WriteByte(c byte)

func (*ZeroCopySink) WriteBytes 

func (self *ZeroCopySink) WriteBytes(p []byte)

func (*ZeroCopySink) WriteHash 

func (self *ZeroCopySink) WriteHash(hash Uint256)

func (*ZeroCopySink) WriteInt16 

func (self *ZeroCopySink) WriteInt16(data int16)

func (*ZeroCopySink) WriteInt32 

func (self *ZeroCopySink) WriteInt32(data int32)

func (*ZeroCopySink) WriteInt64 

func (self *ZeroCopySink) WriteInt64(data int64)

func (*ZeroCopySink) WriteString 

func (self *ZeroCopySink) WriteString(data string) (size uint64)

func (*ZeroCopySink) WriteUint16 

func (self *ZeroCopySink) WriteUint16(data uint16)

func (*ZeroCopySink) WriteUint32 

func (self *ZeroCopySink) WriteUint32(data uint32)

func (*ZeroCopySink) WriteUint64 

func (self *ZeroCopySink) WriteUint64(data uint64)

func (*ZeroCopySink) WriteUint8 

func (self *ZeroCopySink) WriteUint8(data uint8)

func (*ZeroCopySink) WriteVarBytes 

func (self *ZeroCopySink) WriteVarBytes(data []byte) (size uint64)

func (*ZeroCopySink) WriteVarUint 

func (self *ZeroCopySink) WriteVarUint(data uint64) (size uint64)

type ZeroCopySource 

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

func NewZeroCopySource 

func NewZeroCopySource(b []byte) *ZeroCopySource

NewReader returns a new ZeroCopySource reading from b.

func (*ZeroCopySource) BackUp 

func (self *ZeroCopySource) BackUp(n uint64)

Backs up a number of bytes, so that the next call to NextXXX() returns data again that was already returned by the last call to NextXXX().

func (*ZeroCopySource) Len 

func (self *ZeroCopySource) Len() uint64

Len returns the number of bytes of the unread portion of the slice.

func (*ZeroCopySource) NextAddress 

func (self *ZeroCopySource) NextAddress() (data Address, eof bool)

func (*ZeroCopySource) NextBool 

func (self *ZeroCopySource) NextBool() (data bool, irregular bool, eof bool)

func (*ZeroCopySource) NextByte 

func (self *ZeroCopySource) NextByte() (data byte, eof bool)

ReadByte implements the io.ByteReader interface.

func (*ZeroCopySource) NextBytes 

func (self *ZeroCopySource) NextBytes(n uint64) (data []byte, eof bool)

Read implements the io.ZeroCopySource interface.

func (*ZeroCopySource) NextHash 

func (self *ZeroCopySource) NextHash() (data Uint256, eof bool)

func (*ZeroCopySource) NextInt16 

func (self *ZeroCopySource) NextInt16() (data int16, eof bool)

func (*ZeroCopySource) NextInt32 

func (self *ZeroCopySource) NextInt32() (data int32, eof bool)

func (*ZeroCopySource) NextInt64 

func (self *ZeroCopySource) NextInt64() (data int64, eof bool)

func (*ZeroCopySource) NextString 

func (self *ZeroCopySource) NextString() (data string, size uint64, irregular bool, eof bool)

func (*ZeroCopySource) NextUint16 

func (self *ZeroCopySource) NextUint16() (data uint16, eof bool)

func (*ZeroCopySource) NextUint32 

func (self *ZeroCopySource) NextUint32() (data uint32, eof bool)

func (*ZeroCopySource) NextUint64 

func (self *ZeroCopySource) NextUint64() (data uint64, eof bool)

func (*ZeroCopySource) NextUint8 

func (self *ZeroCopySource) NextUint8() (data uint8, eof bool)

func (*ZeroCopySource) NextVarBytes 

func (self *ZeroCopySource) NextVarBytes() (data []byte, size uint64, irregular bool, eof bool)

func (*ZeroCopySource) NextVarUint 

func (self *ZeroCopySource) NextVarUint() (data uint64, size uint64, irregular bool, eof bool)

func (*ZeroCopySource) Pos 

func (self *ZeroCopySource) Pos() uint64

func (*ZeroCopySource) Size 

func (self *ZeroCopySource) Size() uint64

Size returns the original length of the underlying byte slice. Size is the number of bytes available for reading via ReadAt. The returned value is always the same and is not affected by calls to any other method.

func (*ZeroCopySource) Skip 

func (self *ZeroCopySource) Skip(n uint64) (eof bool)

Source Files

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