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p2pkh.go
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p2pkh.go
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/*
SansWallet is a BIP32, BIP44, BIP49 and BIP84 compatible hierarchical determinstic wallet
Copyright (C) 2018 Sans Central
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package sanswallet
import (
"errors"
"github.com/btcsuite/btcd/chaincfg"
"github.com/sanscentral/sanswallet/keys"
"github.com/sanscentral/sanswallet/network"
)
var (
// possible prefixes for a P2PKH key (Used for key validation)
p2pkhHumanPre = map[string]bool{"xpub": true, "xprv": true, "tpub": true, "tprv": true}
)
// GetExtPrvForP2PKHAccount returns extended private key for BIP44 P2PKH account
func GetExtPrvForP2PKHAccount(seed []byte, accountIndex int, testnet bool) (string, error) {
index, err := intToUint32(accountIndex)
if err != nil {
return "", err
}
net := network.BTCMainnet
if testnet {
net = network.BTCTestnet
}
m, err := keys.GetExtendedMasterPrivateKeyFromSeedBytes(seed, net)
if err != nil {
return "", err
}
// Note: version prefix is unchanged for P2PKH since it matches network params
return keys.GetBIP44AccountKey(m, index, true)
}
// GetExtPubForP2PKHAccount returns extended public key for BIP44 P2PKH account
func GetExtPubForP2PKHAccount(seed []byte, accountIndex int, testnet bool) (string, error) {
index, err := intToUint32(accountIndex)
if err != nil {
return "", err
}
net := network.BTCMainnet
if testnet {
net = network.BTCTestnet
}
m, err := keys.GetExtendedMasterPrivateKeyFromSeedBytes(seed, net)
if err != nil {
return "", err
}
// Note: version prefix is unchanged for P2PKH since it matches network params
return keys.GetBIP44AccountKey(m, index, false)
}
// GetP2PKHAddressForIndex returns address for BTC account at given index
// P2PK ('1' prefixed addresses) origional pay-to-public-key (use BIP44 derived key)
func GetP2PKHAddressForIndex(accountKey string, addressIndex int, isChange bool, testnet bool) (string, error) {
validPre := p2pkhHumanPre[accountKey[:4]]
if !validPre {
return "", errors.New("Key does not start with a P2SH prefix")
}
index, err := intToUint32(addressIndex)
if err != nil {
return "", err
}
addt := keys.ExternalAddress
if isChange {
addt = keys.ChangeAddress
}
k, err := keys.GetAccountAddressKey(accountKey, addt, index)
if err != nil {
return "", err
}
netParam := &chaincfg.MainNetParams
if testnet {
netParam = &chaincfg.TestNet3Params
}
a, err := k.Address(netParam)
if err != nil {
return "", err
}
return a.EncodeAddress(), nil
}