forked from aergoio/aergo
/
account.go
111 lines (97 loc) · 2.45 KB
/
account.go
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package types
import (
"encoding/hex"
"errors"
"fmt"
"strings"
"github.com/anaskhan96/base58check"
)
const AddressLength = 33
const NameLength = 12
const EncodedAddressLength = 52
//NewAccount alloc new account object
func NewAccount(addr []byte) *Account {
return &Account{
Address: addr,
}
}
//ToAddress return byte array of given base58check encoded address string
func ToAddress(addr string) []byte {
ret, err := DecodeAddress(addr)
if err != nil {
return nil
}
return ret
}
//ToString return base58check encoded string of address
func (a *Account) ToString() string {
return EncodeAddress(a.Address)
}
//NewAccountList alloc new account list
func NewAccountList(accounts []*Account) *AccountList {
return &AccountList{
Accounts: accounts,
}
}
type Address = []byte
const AddressVersion = 0x42
const PrivKeyVersion = 0xAA
func EncodeAddress(addr Address) string {
if len(addr) <= NameLength {
return string(addr)
}
encoded, _ := base58check.Encode(fmt.Sprintf("%x", AddressVersion), hex.EncodeToString(addr))
return encoded
}
const allowed = "abcdefghijklmnopqrstuvwxyz1234567890."
func DecodeAddress(encodedAddr string) (Address, error) {
if len(encodedAddr) <= NameLength {
name := encodedAddr
for _, char := range string(name) {
if !strings.Contains(allowed, strings.ToLower(string(char))) {
return nil, fmt.Errorf("not allowed character in %s", string(name))
}
}
return []byte(name), nil
}
decodedString, err := base58check.Decode(encodedAddr)
if err != nil {
return nil, err
}
decodedBytes, err := hex.DecodeString(decodedString)
if err != nil {
return nil, err
}
var decoded []byte
version := decodedBytes[0]
switch version {
case AddressVersion:
decoded = decodedBytes[1:]
if len(decoded) != AddressLength {
return nil, errors.New("Invalid address length")
}
default:
return nil, errors.New("Invalid address version")
}
return decoded, nil
}
func EncodePrivKey(key []byte) string {
encoded, _ := base58check.Encode(fmt.Sprintf("%x", PrivKeyVersion), hex.EncodeToString(key))
return encoded
}
func DecodePrivKey(encodedKey string) ([]byte, error) {
decodedString, err := base58check.Decode(encodedKey)
if err != nil {
return nil, err
}
decodedBytes, err := hex.DecodeString(decodedString)
if err != nil {
return nil, err
}
version := decodedBytes[0]
if version != PrivKeyVersion {
return nil, errors.New("Invalid private key version")
}
decoded := decodedBytes[1:]
return decoded, nil
}