// generateKeyPair generates and stores a secp256k1 keypair in a file.
func generateKeyPair(filename string) error {
key, err := ecdsa.GenerateKey(curve, rand.Reader)
if err != nil {
return err
}
pub := btcec.PublicKey{curve,
key.PublicKey.X,
key.PublicKey.Y}
priv := btcec.PrivateKey{key.PublicKey, key.D}
addr, err := address.NewAddressPubKeyHash(Hash160(pub.SerializeCompressed()),
PubKeyHashAddrID)
if err != nil {
return err
}
privWif := NewWIF(priv)
var buf bytes.Buffer
buf.WriteString("Address: ")
buf.WriteString(addr.EncodeAddress())
buf.WriteString("\n")
buf.WriteString("Private key: ")
buf.WriteString(privWif.String())
buf.WriteString("\n")
err = writeNewFile(filename, buf.Bytes(), 0644)
if err != nil {
return err
}
return nil
}
// Address converts the extended key to a standard bitcoin pay-to-pubkey-hash
// address for the passed network.
func (k *ExtendedKey) Address(pkhaid [2]byte) (*address.AddressPubKeyHash, error) {
pkHash := Hash160(k.pubKeyBytes())
return address.NewAddressPubKeyHash(pkHash, pkhaid)
}