util

package

v0.0.0-...-7d53c9d Latest Latest Go to latest Published: Jul 31, 2022 License: GPL-3.0 Imports: 15 Imported by: 0

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Repository

github.com/realForbis/continuum-go-sdk

Links

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Documentation ¶

Index ¶

Constants
Variables
func AllZero(b []byte) bool
func BE_Bytes2Int(buf []byte) int64
func BE_BytesToUint32(buf []byte) uint32
func BE_BytesToUint64(buf []byte) uint64
func BE_Int2Bytes(i int64) []byte
func BE_Uint32ToBytes(i uint32) []byte
func BE_Uint64ToBytes(i uint64) []byte
func BigMax(x, y *big.Int) *big.Int
func BigMin(x, y *big.Int) *big.Int
func BigPow(a, b int64) *big.Int
func BigUint64(v *big.Int) (uint64, bool)
func Bool2Bytes(b bool) []byte
func Byte(bigint *big.Int, padlength, n int) byte
func Bytes2Hex(d []byte) string
func BytesEqual(a, b []byte) bool
func BytesToString(data []byte) string
func CopyBytes(b []byte) (copiedBytes []byte)
func CreateDirIfNotExist(dir string) error
func Decrypt(cryptograph string, passphrase string) (string, error)
func DecryptBytes(encryptedJSON []byte, passphrase []byte) ([]byte, error)
func Encrypt(raw string, passphrase string) (string, error)
func EncryptBytes(raw []byte, passphrase []byte) ([]byte, error)
func Exp(base, exponent *big.Int) *big.Int
func FromHex(s string) []byte
func Hash(size int, data ...[]byte) []byte
func Hash256(data ...[]byte) []byte
func Hex2Bytes(str string) []byte
func Hex2BytesFixed(str string, flen int) []byte
func Hex32ToBytes(s string) [32]byte
func Hex64ToBytes(s string) [64]byte
func HexToBytes(s string) []byte
func JoinBytes(data ...[]byte) []byte
func LE_BytesToInt64(buf []byte) int64
func LE_BytesToUint32(buf []byte) uint32
func LE_BytesToUint64(buf []byte) uint64
func LE_EncodeVarInt(val uint64) []byte
func LE_Int64ToBytes(i int64) []byte
func LE_Uint32ToBytes(i uint32) []byte
func LE_Uint64ToBytes(i uint64) []byte
func LeftPadBytes(slice []byte, l int) []byte
func Max(x, y uint64) uint64
func Min(x, y uint64) uint64
func PaddedBigBytes(bigint *big.Int, n int) []byte
func RandomFixedBytes(length int) []byte
func RandomFixedString(length int) string
func ReadBits(bigint *big.Int, buf []byte)
func ReverseBytes(str []byte) (result []byte)
func RightPadBytes(slice []byte, l int) []byte
func S256(x *big.Int) *big.Int
func SafeAdd(x, y uint64) (uint64, bool)
func SafeMul(x, y uint64) (uint64, bool)
func SafeSub(x, y uint64) (uint64, bool)
func String2Bytes(s string) []byte
func StringToBigInt(str *string) (*big.Int, error)
func ToHex(b []byte) stringdeprecated
func ToIndentString(v interface{}) string
func ToString(v interface{}) string
func ToWordSize(size uint64) uint64
func TrimBuffToString(bytes []byte) string
func TrimQuotes(s string) string
func U256(x *big.Int) *big.Int

Constants ¶

View Source

const (
	// StandardScryptN is the N parameter of Scrypt encryption algorithm, using 256MB
	// memory and taking approximately 1s CPU time on a modern processor.
	StandardScryptN = 1 << 18

	// StandardScryptP is the P parameter of Scrypt encryption algorithm, using 256MB
	// memory and taking approximately 1s CPU time on a modern processor.
	StandardScryptP = 1
)

View Source

const (
	MaxUint64 = uint64(1<<64 - 1)

	// number of bits in a big.Word
	WordBits = 32 << (uint64(^big.Word(0)) >> 63)
	// number of bytes in a big.Word
	WordBytes = WordBits / 8
	// number of bytes in a vm word
	WordSize = 32
)

Variables ¶

View Source

var (
	Big0   = big.NewInt(0)
	Big1   = big.NewInt(1)
	Big2   = big.NewInt(2)
	Big10  = big.NewInt(10)
	Big31  = big.NewInt(31)
	Big32  = big.NewInt(32)
	Big256 = big.NewInt(256)
	Big257 = big.NewInt(257)

	Tt255   = BigPow(2, 255)
	Tt256   = BigPow(2, 256)
	Tt256m1 = new(big.Int).Sub(Tt256, big.NewInt(1))
)

Functions ¶

func AllZero ¶

func AllZero(b []byte) bool

func BE_Bytes2Int ¶

func BE_Bytes2Int(buf []byte) int64

func BE_BytesToUint32 ¶

func BE_BytesToUint32(buf []byte) uint32

func BE_BytesToUint64 ¶

func BE_BytesToUint64(buf []byte) uint64

func BE_Int2Bytes ¶

func BE_Int2Bytes(i int64) []byte

func BE_Uint32ToBytes ¶

func BE_Uint32ToBytes(i uint32) []byte

func BE_Uint64ToBytes ¶

func BE_Uint64ToBytes(i uint64) []byte

func BigMax ¶

func BigMax(x, y *big.Int) *big.Int

BigMax returns the larger of x or y.

func BigMin ¶

func BigMin(x, y *big.Int) *big.Int

BigMin returns the smaller of x or y.

func BigPow ¶

func BigPow(a, b int64) *big.Int

BigPow returns a ** b as a big integer.

func BigUint64 ¶

func BigUint64(v *big.Int) (uint64, bool)

BigUint64 returns the integer casted to a uint64 and returns whether it overflowed in the process.

func Bool2Bytes ¶

func Bool2Bytes(b bool) []byte

func Byte ¶

func Byte(bigint *big.Int, padlength, n int) byte

Byte returns the byte at position n, with the supplied padlength in Little-Endian encoding. n==0 returns the MSB Example: bigint '5', padlength 32, n=31 => 5

func Bytes2Hex ¶

func Bytes2Hex(d []byte) string

Bytes2Hex returns the hexadecimal encoding of d.

func BytesEqual ¶

func BytesEqual(a, b []byte) bool

func BytesToString ¶

func BytesToString(data []byte) string

func CopyBytes ¶

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

CopyBytes returns an exact copy of the provided bytes.

func CreateDirIfNotExist ¶

func CreateDirIfNotExist(dir string) error

CreateDirIfNotExist create given folder

func Decrypt ¶

func Decrypt(cryptograph string, passphrase string) (string, error)

func DecryptBytes ¶

func DecryptBytes(encryptedJSON []byte, passphrase []byte) ([]byte, error)

DecryptBytes decrypt raw json to raw

func Encrypt ¶

func Encrypt(raw string, passphrase string) (string, error)

func EncryptBytes ¶

func EncryptBytes(raw []byte, passphrase []byte) ([]byte, error)

EncryptBytes encrypts raw by passphrase to json binary

func Exp ¶

func Exp(base, exponent *big.Int) *big.Int

Exp implements exponentiation by squaring. Exp returns a newly-allocated big integer and does not change base or exponent. The result is truncated to 256 bits.

func FromHex ¶

func FromHex(s string) []byte

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

func Hash ¶

func Hash(size int, data ...[]byte) []byte

func Hash256 ¶

func Hash256(data ...[]byte) []byte

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 Hex32ToBytes ¶

func Hex32ToBytes(s string) [32]byte

func Hex64ToBytes ¶

func Hex64ToBytes(s string) [64]byte

func HexToBytes ¶

func HexToBytes(s string) []byte

func JoinBytes ¶

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

func LE_BytesToInt64 ¶

func LE_BytesToInt64(buf []byte) int64

func LE_BytesToUint32 ¶

func LE_BytesToUint32(buf []byte) uint32

func LE_BytesToUint64 ¶

func LE_BytesToUint64(buf []byte) uint64

func LE_EncodeVarInt ¶

func LE_EncodeVarInt(val uint64) []byte

func LE_Int64ToBytes ¶

func LE_Int64ToBytes(i int64) []byte

func LE_Uint32ToBytes ¶

func LE_Uint32ToBytes(i uint32) []byte

func LE_Uint64ToBytes ¶

func LE_Uint64ToBytes(i uint64) []byte

func LeftPadBytes ¶

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

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

func Max ¶

func Max(x, y uint64) uint64

func Min ¶

func Min(x, y uint64) uint64

func PaddedBigBytes ¶

func PaddedBigBytes(bigint *big.Int, n int) []byte

PaddedBigBytes encodes a big integer as a big-endian byte slice. The length of the slice is at least n bytes.

func RandomFixedBytes ¶

func RandomFixedBytes(length int) []byte

func RandomFixedString ¶

func RandomFixedString(length int) string

func ReadBits ¶

func ReadBits(bigint *big.Int, buf []byte)

ReadBits encodes the absolute amount of bigint as big-endian bytes. Callers must ensure that buf has enough space. If buf is too short the result will be incomplete.

func ReverseBytes ¶

func ReverseBytes(str []byte) (result []byte)

func RightPadBytes ¶

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

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

func S256 ¶

func S256(x *big.Int) *big.Int

S256 interprets x as a two's complement number. x must not exceed 256 bits (the result is undefined if it does) and is not modified.

S256(0)        = 0
S256(1)        = 1
S256(2**255)   = -2**255
S256(2**256-1) = -1

func SafeAdd ¶

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

SafeAdd returns the result and whether overflow occurred.

func SafeMul ¶

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

SafeMul returns multiplication result and whether overflow occurred.

func SafeSub ¶

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

SafeSub returns subtraction result and whether overflow occurred.

func String2Bytes ¶

func String2Bytes(s string) []byte

func StringToBigInt ¶

func StringToBigInt(str *string) (*big.Int, error)

func ToHex deprecated

func ToHex(b []byte) string

ToHex returns the hex representation of b, prefixed with '0x'. For empty slices, the return value is "0x0".

Deprecated: use hexutil.Encode instead.

func ToIndentString ¶

func ToIndentString(v interface{}) string

func ToString ¶

func ToString(v interface{}) string

func ToWordSize ¶

func ToWordSize(size uint64) uint64

ToWordSize returns the ceiled word size required for memory expansion.

func TrimBuffToString ¶

func TrimBuffToString(bytes []byte) string

trim the '\00' byte

func TrimQuotes ¶

func TrimQuotes(s string) string

TrimQuotes trim quotes of string if quotes exist

func U256 ¶

func U256(x *big.Int) *big.Int

U256 encodes as a 256 bit two's complement number. This operation is destructive.

Types ¶

This section is empty.

Source Files ¶

View all Source files

Directories ¶

Path	Synopsis
hexutil Package hexutil implements hex encoding with 0x prefix.	Package hexutil implements hex encoding with 0x prefix.

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