chainhash

README

chainhash

chainhash provides a generic hash type and associated functions that allows the specific hash algorithm to be abstracted.

Installation and Updating

$ go get -u github.com/l0k18/pod/chaincfg/chainhash

License

Package chainhash is licensed under the copyfree ISC License.

Documentation

Overview

Package chainhash provides abstracted hash functionality. This package provides a generic hash type and associated functions that allows the specific hash algorithm to be abstracted.

Index

• Constants
• Variables
• func Check(err error) bool
• func Debug(a ...interface{})
• func Debugc(fn func() string)
• func Debugf(format string, a ...interface{})
• func Debugs(a interface{})
• func Decode(dst *Hash, src string) error
• func DoubleHashB(b []byte) []byte
• func Error(a ...interface{})
• func Errorc(fn func() string)
• func Errorf(format string, a ...interface{})
• func Errors(a interface{})
• func Fatal(a ...interface{})
• func Fatalc(fn func() string)
• func Fatalf(format string, a ...interface{})
• func Fatals(a interface{})
• func HashB(b []byte) []byte
• func Info(a ...interface{})
• func Infoc(fn func() string)
• func Infof(format string, a ...interface{})
• func Infos(a interface{})
• func Trace(a ...interface{})
• func Tracec(fn func() string)
• func Tracef(format string, a ...interface{})
• func Traces(a interface{})
• func Warn(a ...interface{})
• func Warnc(fn func() string)
• func Warnf(format string, a ...interface{})
• func Warns(a interface{})
• type Hash
  • func DoubleHashH(b []byte) Hash
  • func HashH(b []byte) Hash
  • func NewHash(newHash []byte) (*Hash, error)
  • func NewHashFromStr(hash string) (*Hash, error)
  • func (hash *Hash) CloneBytes() []byte
  • func (hash *Hash) IsEqual(target *Hash) bool
  • func (hash *Hash) SetBytes(newHash []byte) error
  • func (hash Hash) String() string

Constants

const HashSize = 32

HashSize of array used to store hashes. See Hash.

const MaxHashStringSize = HashSize * 2

MaxHashStringSize is the maximum length of a Hash hash string.

Variables

var ErrHashStrSize = fmt.Errorf("max hash string length is %v bytes", MaxHashStringSize)

ErrHashStrSize describes an error that indicates the caller specified a hash string that has too many characters.

Functions

func Check

func Check(err error) bool

func Debug

func Debug(a ...interface{})

func Debugc

func Debugc(fn func() string)

func Debugf

func Debugf(format string, a ...interface{})

func Debugs

func Debugs(a interface{})

func Decode

func Decode(dst *Hash, src string) error

Decode decodes the byte-reversed hexadecimal string encoding of a Hash to a destination.

func DoubleHashB

func DoubleHashB(b []byte) []byte

DoubleHashB calculates hash(hash(b)) and returns the resulting bytes.

func Error

func Error(a ...interface{})

func Errorc

func Errorc(fn func() string)

func Errorf

func Errorf(format string, a ...interface{})

func Errors

func Errors(a interface{})

func Fatal

func Fatal(a ...interface{})

func Fatalc

func Fatalc(fn func() string)

func Fatalf

func Fatalf(format string, a ...interface{})

func Fatals

func Fatals(a interface{})

func HashB

func HashB(b []byte) []byte

HashB calculates hash(b) and returns the resulting bytes.

func Info

func Info(a ...interface{})

func Infoc

func Infoc(fn func() string)

func Infof

func Infof(format string, a ...interface{})

func Infos

func Infos(a interface{})

func Trace

func Trace(a ...interface{})

func Tracec

func Tracec(fn func() string)

func Tracef

func Tracef(format string, a ...interface{})

func Traces

func Traces(a interface{})

func Warn

func Warn(a ...interface{})

func Warnc

func Warnc(fn func() string)

func Warnf

func Warnf(format string, a ...interface{})

func Warns

func Warns(a interface{})

Types

type Hash

type Hash [HashSize]byte

Hash is used in several of the bitcoin messages and common structures. It typically represents the double sha256 of data.

func DoubleHashH

func DoubleHashH(b []byte) Hash

DoubleHashH calculates hash(hash(b)) and returns the resulting bytes as a Hash.

func HashH

func HashH(b []byte) Hash

HashH calculates hash(b) and returns the resulting bytes as a Hash.

func NewHash

func NewHash(newHash []byte) (*Hash, error)

NewHash returns a new Hash from a byte slice. An error is returned if the number of bytes passed in is not HashSize.

func NewHashFromStr

func NewHashFromStr(hash string) (*Hash, error)

NewHashFromStr creates a Hash from a hash string. The string should be the hexadecimal string of a byte-reversed hash, but any missing characters result in zero padding at the end of the Hash.

func (*Hash) CloneBytes

func (hash *Hash) CloneBytes() []byte

CloneBytes returns a copy of the bytes which represent the hash as a byte slice. NOTE: It is generally cheaper to just slice the hash directly thereby reusing the same bytes rather than calling this method.

func (*Hash) IsEqual

func (hash *Hash) IsEqual(target *Hash) bool

IsEqual returns true if target is the same as hash.

func (*Hash) SetBytes

func (hash *Hash) SetBytes(newHash []byte) error

SetBytes sets the bytes which represent the hash. An error is returned if the number of bytes passed in is not HashSize.

func (Hash) String

func (hash Hash) String() string

String returns the Hash as the hexadecimal string of the byte-reversed hash.