//GetKeyFromWIF gets PublicKey and PrivateKey from private key of WIF format.
func GetKeyFromWIF(wif string) (*Key, error) {
secp256k1 := btcec.S256()
privateKeyBytes, isCmpressed, err := base58check.Decode(wif)
if err != nil {
return nil, err
}
pub := PublicKey{}
priv := PrivateKey{}
key := Key{
Pub: &pub,
Priv: &priv,
}
switch privateKeyBytes[0] {
case 0xef:
pub.isTestnet = true
priv.isTestnet = true
case 0x80:
pub.isTestnet = false
priv.isTestnet = false
default:
return nil, errors.New("cannot determin net param from private key")
}
pub.isCompressed = isCmpressed
//Get the raw public
priv.key, pub.key = btcec.PrivKeyFromBytes(secp256k1, privateKeyBytes[1:])
return &key, nil
}
//IsTestnet returns true if addr is for testnet.
func IsTestnet(addr string) (bool, error) {
bytes, _, err := base58check.Decode(addr)
if err != nil {
return false, err
}
switch bytes[0] {
case 0x6f:
return true, nil
case 0x00:
return false, nil
default:
return false, errors.New("invalid address")
}
}
//CreateStandardScriptPubkey creates standard script pubkey .
func createP2PKHScriptPubkey(publicKeyBase58 string) ([]byte, error) {
publicKeyBytes, _, err := base58check.Decode(publicKeyBase58)
if err != nil {
return nil, err
}
publicKeyBytes = publicKeyBytes[1:]
var scriptPubKey bytes.Buffer
scriptPubKey.WriteByte(opDUP)
scriptPubKey.WriteByte(opHASH160)
scriptPubKey.WriteByte(byte(len(publicKeyBytes))) //PUSH
scriptPubKey.Write(publicKeyBytes)
scriptPubKey.WriteByte(opEQUALVERIFY)
scriptPubKey.WriteByte(opCHECKSIG)
script := scriptPubKey.Bytes()
return script, nil
}