forked from TrueCloudLab/neoneo-go
145 lines
3.5 KiB
Go
145 lines
3.5 KiB
Go
package util
|
|
|
|
import (
|
|
"encoding/hex"
|
|
"encoding/json"
|
|
"fmt"
|
|
"strings"
|
|
|
|
"github.com/nspcc-dev/neo-go/pkg/io"
|
|
)
|
|
|
|
// Uint160Size is the size of Uint160 in bytes.
|
|
const Uint160Size = 20
|
|
|
|
// Uint160 is a 20 byte long unsigned integer.
|
|
type Uint160 [Uint160Size]uint8
|
|
|
|
// Uint160DecodeStringBE attempts to decode the given string into an Uint160.
|
|
func Uint160DecodeStringBE(s string) (Uint160, error) {
|
|
var u Uint160
|
|
if len(s) != Uint160Size*2 {
|
|
return u, fmt.Errorf("expected string size of %d got %d", Uint160Size*2, len(s))
|
|
}
|
|
b, err := hex.DecodeString(s)
|
|
if err != nil {
|
|
return u, err
|
|
}
|
|
return Uint160DecodeBytesBE(b)
|
|
}
|
|
|
|
// Uint160DecodeStringLE attempts to decode the given string
|
|
// in little-endian hex encoding into an Uint160.
|
|
func Uint160DecodeStringLE(s string) (Uint160, error) {
|
|
var u Uint160
|
|
if len(s) != Uint160Size*2 {
|
|
return u, fmt.Errorf("expected string size of %d got %d", Uint160Size*2, len(s))
|
|
}
|
|
|
|
b, err := hex.DecodeString(s)
|
|
if err != nil {
|
|
return u, err
|
|
}
|
|
|
|
return Uint160DecodeBytesLE(b)
|
|
}
|
|
|
|
// Uint160DecodeBytesBE attempts to decode the given bytes into an Uint160.
|
|
func Uint160DecodeBytesBE(b []byte) (u Uint160, err error) {
|
|
if len(b) != Uint160Size {
|
|
return u, fmt.Errorf("expected byte size of %d got %d", Uint160Size, len(b))
|
|
}
|
|
copy(u[:], b)
|
|
return
|
|
}
|
|
|
|
// Uint160DecodeBytesLE attempts to decode the given bytes in little-endian
|
|
// into an Uint160.
|
|
func Uint160DecodeBytesLE(b []byte) (u Uint160, err error) {
|
|
if len(b) != Uint160Size {
|
|
return u, fmt.Errorf("expected byte size of %d got %d", Uint160Size, len(b))
|
|
}
|
|
|
|
for i := range b {
|
|
u[Uint160Size-i-1] = b[i]
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// BytesBE returns a big-endian byte representation of u.
|
|
func (u Uint160) BytesBE() []byte {
|
|
return u[:]
|
|
}
|
|
|
|
// BytesLE returns a little-endian byte representation of u.
|
|
func (u Uint160) BytesLE() []byte {
|
|
return ArrayReverse(u.BytesBE())
|
|
}
|
|
|
|
// String implements the stringer interface.
|
|
func (u Uint160) String() string {
|
|
return u.StringBE()
|
|
}
|
|
|
|
// StringBE returns string representations of u with big-endian byte order.
|
|
func (u Uint160) StringBE() string {
|
|
return hex.EncodeToString(u.BytesBE())
|
|
}
|
|
|
|
// StringLE returns string representations of u with little-endian byte order.
|
|
func (u Uint160) StringLE() string {
|
|
return hex.EncodeToString(u.BytesLE())
|
|
}
|
|
|
|
// Reverse returns reversed representation of u.
|
|
func (u Uint160) Reverse() (r Uint160) {
|
|
for i := 0; i < Uint160Size; i++ {
|
|
r[i] = u[Uint160Size-i-1]
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// Equals returns true if both Uint256 values are the same.
|
|
func (u Uint160) Equals(other Uint160) bool {
|
|
return u == other
|
|
}
|
|
|
|
// Less returns true if this value is less than given Uint160 value. It's
|
|
// primarily intended to be used for sorting purposes.
|
|
func (u Uint160) Less(other Uint160) bool {
|
|
for k := range u {
|
|
if u[k] == other[k] {
|
|
continue
|
|
}
|
|
return u[k] < other[k]
|
|
}
|
|
return false
|
|
}
|
|
|
|
// UnmarshalJSON implements the json unmarshaller interface.
|
|
func (u *Uint160) UnmarshalJSON(data []byte) (err error) {
|
|
var js string
|
|
if err = json.Unmarshal(data, &js); err != nil {
|
|
return err
|
|
}
|
|
js = strings.TrimPrefix(js, "0x")
|
|
*u, err = Uint160DecodeStringLE(js)
|
|
return err
|
|
}
|
|
|
|
// MarshalJSON implements the json marshaller interface.
|
|
func (u Uint160) MarshalJSON() ([]byte, error) {
|
|
return []byte(`"0x` + u.StringLE() + `"`), nil
|
|
}
|
|
|
|
// EncodeBinary implements Serializable interface.
|
|
func (u *Uint160) EncodeBinary(bw *io.BinWriter) {
|
|
bw.WriteBytes(u[:])
|
|
}
|
|
|
|
// DecodeBinary implements Serializable interface.
|
|
func (u *Uint160) DecodeBinary(br *io.BinReader) {
|
|
br.ReadBytes(u[:])
|
|
}
|