// newManagedAddress returns a new managed address based on the passed account,
// private key, and whether or not the public key is compressed. The managed
// address will have access to the private and public keys.
func newManagedAddress(m *Manager, account uint32, privKey *btcec.PrivateKey, compressed bool) (*managedAddress, error) {
// Encrypt the private key.
//
// NOTE: The privKeyBytes here are set into the managed address which
// are cleared when locked, so they aren't cleared here.
privKeyBytes := privKey.Serialize()
privKeyEncrypted, err := m.cryptoKeyPriv.Encrypt(privKeyBytes)
if err != nil {
str := "failed to encrypt private key"
return nil, managerError(ErrCrypto, str, err)
}
// Leverage the code to create a managed address without a private key
// and then add the private key to it.
ecPubKey := (*btcec.PublicKey)(&privKey.PublicKey)
managedAddr, err := newManagedAddressWithoutPrivKey(m, account,
ecPubKey, compressed)
if err != nil {
return nil, err
}
managedAddr.privKeyEncrypted = privKeyEncrypted
managedAddr.privKeyCT = privKeyBytes
return managedAddr, nil
}
// RawTxInSignature returns the serialized ECDSA signature for the input idx of
// the given transaction, with hashType appended to it.
func RawTxInSignature(tx *wire.MsgTx, idx int, subScript []byte,
hashType SigHashType, key *btcec.PrivateKey) ([]byte, error) {
parsedScript, err := parseScript(subScript)
if err != nil {
return nil, fmt.Errorf("cannot parse output script: %v", err)
}
hash := calcSignatureHash(parsedScript, hashType, tx, idx)
signature, err := key.Sign(hash)
if err != nil {
return nil, fmt.Errorf("cannot sign tx input: %s", err)
}
return append(signature.Serialize(), byte(hashType)), nil
}