forked from foxnut/go-hdwallet
/
key.go
229 lines (184 loc) · 4.55 KB
/
key.go
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package hdwallet
import (
"crypto/ecdsa"
"encoding/hex"
"github.com/btcsuite/btcd/btcec/v2"
"github.com/btcsuite/btcd/btcutil"
"github.com/btcsuite/btcd/btcutil/hdkeychain"
"github.com/btcsuite/btcd/txscript"
)
// Key struct
type Key struct {
Opt *Options
Extended *hdkeychain.ExtendedKey
// for btc
Private *btcec.PrivateKey
Public *btcec.PublicKey
// for eth
PrivateECDSA *ecdsa.PrivateKey
PublicECDSA *ecdsa.PublicKey
}
// NewKey creates a master key
// params: [Mnemonic], [Password], [Language], [Seed]
func NewKey(opts ...Option) (*Key, error) {
var (
err error
o = newOptions(opts...)
)
if len(o.Seed) <= 0 {
o.Seed, err = NewSeed(o.Mnemonic, o.Password, o.Language)
}
if err != nil {
return nil, err
}
extended, err := hdkeychain.NewMaster(o.Seed, o.Params)
if err != nil {
return nil, err
}
key := &Key{
Opt: o,
Extended: extended,
}
err = key.init()
if err != nil {
return nil, err
}
return key, nil
}
func (k *Key) init() error {
var err error
k.Private, err = k.Extended.ECPrivKey()
if err != nil {
return err
}
k.Public, err = k.Extended.ECPubKey()
if err != nil {
return err
}
k.PrivateECDSA = k.Private.ToECDSA()
k.PublicECDSA = &k.PrivateECDSA.PublicKey
return nil
}
// GetChildKey return a key from master key
// params: [Purpose], [CoinType], [Account], [Change], [AddressIndex], [Path]
func (k *Key) GetChildKey(opts ...Option) (*Key, error) {
var (
err error
o = newOptions(opts...)
no = o
)
typ, ok := coinTypes[o.CoinType]
if ok {
no = newOptions(append(opts, CoinType(typ))...)
}
extended := k.Extended
for _, i := range no.GetPath() {
extended, err = extended.Derive(i)
if err != nil {
return nil, err
}
}
key := &Key{
Opt: o,
Extended: extended,
}
err = key.init()
if err != nil {
return nil, err
}
return key, nil
}
// GetWallet return wallet from master key
// params: [Purpose], [CoinType], [Account], [Change], [AddressIndex], [Path]
func (k *Key) GetWallet(opts ...Option) (Wallet, error) {
key, err := k.GetChildKey(opts...)
if err != nil {
return nil, err
}
coin, ok := coins[key.Opt.CoinType]
if !ok {
return nil, ErrCoinTypeUnknow
}
return coin(key), nil
}
// PrivateHex generate private key to string by hex
func (k *Key) PrivateHex() string {
return hex.EncodeToString(k.Private.Serialize())
}
// PrivateWIF generate private key to string by wif
func (k *Key) PrivateWIF(compress bool) (string, error) {
wif, err := btcutil.NewWIF(k.Private, k.Opt.Params, compress)
if err != nil {
return "", err
}
return wif.String(), nil
}
// PublicHex generate public key to string by hex
func (k *Key) PublicHex(compress bool) string {
if compress {
return hex.EncodeToString(k.Public.SerializeCompressed())
}
return hex.EncodeToString(k.Public.SerializeUncompressed())
}
// PublicHash generate public key by hash160
func (k *Key) PublicHash() ([]byte, error) {
address, err := k.Extended.Address(k.Opt.Params)
if err != nil {
return nil, err
}
return address.ScriptAddress(), nil
}
// AddressBTC generate public key to btc style address
func (k *Key) AddressBTC() (string, error) {
address, err := k.Extended.Address(k.Opt.Params)
if err != nil {
return "", err
}
return address.EncodeAddress(), nil
}
// // AddressBCH generate public key to bch style address
// func (k *Key) AddressBCH() (string, error) {
// address, err := k.Extended.Address(k.Opt.Params)
// if err != nil {
// return "", err
// }
// addr, err := bchutil.NewCashAddressPubKeyHash(address.ScriptAddress(), k.Opt.Params)
// if err != nil {
// return "", err
// }
// data := addr.EncodeAddress()
// prefix := bchutil.Prefixes[k.Opt.Params.Name]
// return prefix + ":" + data, nil
// }
// AddressP2WPKH generate public key to p2wpkh style address
func (k *Key) AddressP2WPKH() (string, error) {
pubHash, err := k.PublicHash()
if err != nil {
return "", err
}
addr, err := btcutil.NewAddressWitnessPubKeyHash(pubHash, k.Opt.Params)
if err != nil {
return "", err
}
return addr.EncodeAddress(), nil
}
// AddressP2WPKHInP2SH generate public key to p2wpkh nested within p2sh style address
func (k *Key) AddressP2WPKHInP2SH() (string, error) {
pubHash, err := k.PublicHash()
if err != nil {
return "", err
}
addr, err := btcutil.NewAddressWitnessPubKeyHash(pubHash, k.Opt.Params)
if err != nil {
return "", err
}
script, err := txscript.PayToAddrScript(addr)
if err != nil {
return "", err
}
addr1, err := btcutil.NewAddressScriptHash(script, k.Opt.Params)
if err != nil {
return "", err
}
return addr1.EncodeAddress(), nil
}