common

Documentation

Index

• Constants
• Variables
• func Bytes2BigInt(b [32]byte) *big.Int
• func Bytes2Hex(d []byte) string
• func CopyBytes(b []byte) (copiedBytes []byte)
• func FromHex(s string) []byte
• func GetCurrentTime() string
• func Hex2Bytes(str string) []byte
• func Hex2BytesFixed(str string, flen int) []byte
• func IsHexAddress(s string) bool
• func LeftPadBytes(slice []byte, l int) []byte
• func ParseHexOrString(str string) ([]byte, error)
• func ReadFile(filename string) []byte
• func RightPadBytes(slice []byte, l int) []byte
• func StringIsAllNumber(str string) bool
• func TimestampToTime(timestamp int64) string
• func TrimLeftZeroes(s []byte) []byte
• func TrimRightZeroes(s []byte) []byte
• func WriteFile(filename, context string)
• type Address
  • func BytesToAddress(b []byte) Address
  • func (a *Address) Bytes() []byte
  • func (a *Address) Hex() string
  • func (a *Address) SetBytes(b []byte)
• type Hash
  • func BytesToHash(b []byte) Hash
  • func (h *Hash) Bytes() []byte
  • func (h *Hash) Hex() string
  • func (h *Hash) SetBytes(b []byte)

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.

Variables

var (
	Big0   = big.NewInt(0)
	Big1   = big.NewInt(1)
	Big2   = big.NewInt(2)
	Big3   = big.NewInt(3)
	Big32  = big.NewInt(32)
	Big256 = big.NewInt(256)
	Big257 = big.NewInt(257)
)

Common big integers often used

Functions

func Bytes2BigInt

func Bytes2BigInt(b [32]byte) *big.Int

func Bytes2Hex

func Bytes2Hex(d []byte) string

Bytes2Hex returns the hexadecimal encoding of d.

func CopyBytes

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

CopyBytes returns an exact copy of the provided bytes.

func FromHex

func FromHex(s string) []byte

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

func GetCurrentTime

func GetCurrentTime() string

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 IsHexAddress

func IsHexAddress(s string) bool

IsHexAddress verifies whether a string can represent a valid hex-encoded Ethereum address or not.

func LeftPadBytes

func LeftPadBytes(slice []byte, l int) []byte

LeftPadBytes zero-pads slice to the left up to length l.

func ParseHexOrString

func ParseHexOrString(str string) ([]byte, error)

ParseHexOrString tries to hexdecode b, but if the prefix is missing, it instead just returns the raw bytes

func ReadFile

func ReadFile(filename string) []byte

func RightPadBytes

func RightPadBytes(slice []byte, l int) []byte

RightPadBytes zero-pads slice to the right up to length l.

func StringIsAllNumber

func StringIsAllNumber(str string) bool

func TimestampToTime

func TimestampToTime(timestamp int64) string

func TrimLeftZeroes

func TrimLeftZeroes(s []byte) []byte

TrimLeftZeroes returns a subslice of s without leading zeroes

func TrimRightZeroes

func TrimRightZeroes(s []byte) []byte

TrimRightZeroes returns a subslice of s without trailing zeroes

func WriteFile

func WriteFile(filename, context string)

Types

type Address

type Address [AddressLength]byte

Address represents the 20 byte address of an wallet.

func BytesToAddress

func BytesToAddress(b []byte) Address

BytesToAddress returns Address with value b. If b is larger than len(h), b will be cropped from the left.

func (*Address) Bytes

func (a *Address) Bytes() []byte

func (*Address) Hex

func (a *Address) Hex() string

func (*Address) SetBytes

func (a *Address) SetBytes(b []byte)

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

type Hash

type Hash [HashLength]byte

Hash represents the 32 byte hash of arbitrary data.

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 (*Hash) Bytes

func (h *Hash) Bytes() []byte

Bytes gets the byte representation of the underlying hash.

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.