common

Documentation

Index

• Constants
• func Bytes2Hex(d []byte) string
• func Bytes2HexWith0x(b []byte) string
• func CopyBytes(b []byte) (copiedBytes []byte)
• func FromECDSAPub(pub *ecdsa.PublicKey) []byte
• func FromHex(s string) []byte
• func Hex2Bytes(str string) []byte
• func Hex2BytesFixed(str string, flen int) []byte
• func Keccak256(data ...[]byte) []byte
• func PubkeyToAddress(p *ecdsa.PublicKey) address.Address
• func RecoverPubkey(hash, sig []byte) (*ecdsa.PublicKey, error)
• type Hash
  • func BigToHash(b *big.Int) Hash
  • func BytesToHash(b []byte) Hash
  • func HexToHash(s string) Hash
  • func (h Hash) Big() *big.Int
  • func (h Hash) Bytes() []byte
  • func (h Hash) Format(s fmt.State, c rune)
  • func (h Hash) Hex() string
  • func (h *Hash) SetBytes(b []byte)
  • func (h Hash) String() string
  • func (h Hash) TerminalString() string
• type KeccakState
  • func NewKeccakState() KeccakState

Constants

const (
	// HashLength is the expected length of the hash
	HashLength = 32
	// AddressLength is the expected length of the address
	AddressLength = 20
)

Lengths of hashes and addresses in bytes.

Functions

func Bytes2Hex

func Bytes2Hex(d []byte) string

Bytes2Hex returns the hexadecimal encoding of d.

func Bytes2HexWith0x

func Bytes2HexWith0x(b []byte) string

Bytes2HexWith0x encodes b as a hex string with 0x prefix.

func CopyBytes

func CopyBytes(b []byte) (copiedBytes []byte)

CopyBytes returns an exact copy of the provided bytes.

func FromECDSAPub

func FromECDSAPub(pub *ecdsa.PublicKey) []byte

func FromHex

func FromHex(s string) []byte

FromHex returns the bytes represented by the hexadecimal string s. s may be prefixed with "0x".

func Hex2Bytes

func Hex2Bytes(str string) []byte

Hex2Bytes returns the bytes represented by the hexadecimal string str.

func Hex2BytesFixed

func Hex2BytesFixed(str string, flen int) []byte

Hex2BytesFixed returns bytes of a specified fixed length flen.

func Keccak256

func Keccak256(data ...[]byte) []byte

func PubkeyToAddress

func PubkeyToAddress(p *ecdsa.PublicKey) address.Address

func RecoverPubkey

func RecoverPubkey(hash, sig []byte) (*ecdsa.PublicKey, error)

Types

type Hash

type Hash [HashLength]byte

Hash represents the 32 byte Keccak256 hash of arbitrary data.

func BigToHash

func BigToHash(b *big.Int) Hash

BigToHash sets byte representation of b to hash. If b is larger than len(h), b will be cropped from the left.

func BytesToHash

func BytesToHash(b []byte) Hash

BytesToHash sets b to hash. If b is larger than len(h), b will be cropped from the left.

func HexToHash

func HexToHash(s string) Hash

HexToHash sets byte representation of s to hash. If b is larger than len(h), b will be cropped from the left.

func (Hash) Big

func (h Hash) Big() *big.Int

Big converts a hash to a big integer.

func (Hash) Bytes

func (h Hash) Bytes() []byte

Bytes gets the byte representation of the underlying hash.

func (Hash) Format

func (h Hash) Format(s fmt.State, c rune)

Format implements fmt.Formatter. Hash supports the %v, %s, %q, %x, %X and %d format verbs.

func (Hash) Hex

func (h Hash) Hex() string

Hex converts a hash to a hex string.

func (*Hash) SetBytes

func (h *Hash) SetBytes(b []byte)

SetBytes sets the hash to the value of b. If b is larger than len(h), b will be cropped from the left.

func (Hash) String

func (h Hash) String() string

String implements the stringer interface and is used also by the logger when doing full logging into a file.

func (Hash) TerminalString

func (h Hash) TerminalString() string

TerminalString implements log.TerminalStringer, formatting a string for console output during logging.

type KeccakState

type KeccakState interface {
	hash.Hash
	Read([]byte) (int, error)
}

KeccakState wraps sha3.state. In addition to the usual hash methods, it also supports Read to get a variable amount of data from the hash state. Read is faster than Sum because it doesn't copy the internal state, but also modifies the internal state.

func NewKeccakState

func NewKeccakState() KeccakState

NewKeccakState creates a new KeccakState