Release v0.1.0

vendor/github.com/muun/libwallet/V1.go

@@ -0,0 +1,73 @@
+package libwallet
+
+import (
+	"github.com/btcsuite/btcd/txscript"
+	"github.com/btcsuite/btcd/wire"
+	"github.com/btcsuite/btcutil"
+	"github.com/pkg/errors"
+)
+
+// CreateAddressV1 returns a P2PKH MuunAddress from a publicKey for using in TransactionSchameV1
+func CreateAddressV1(publicKey *HDPublicKey) (MuunAddress, error) {
+	pubkey, err := btcutil.NewAddressPubKey(publicKey.Raw(), publicKey.Network.network)
+	if err != nil {
+		return nil, err
+	}
+
+	pubkeyHash := pubkey.AddressPubKeyHash()
+	address := pubkeyHash.String()
+
+	return &muunAddress{address: address, version: addressV1, derivationPath: publicKey.Path}, nil
+}
+
+func addUserSignatureInputV1(input Input, index int, tx *wire.MsgTx, privateKey *HDPrivateKey) (*wire.TxIn, error) {
+
+	txInput := tx.TxIn[index]
+
+	sig, err := signInputV1(input, index, tx, privateKey)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to sign V1 input")
+	}
+
+	builder := txscript.NewScriptBuilder()
+	builder.AddData(sig)
+	builder.AddData(privateKey.PublicKey().Raw())
+	script, err := builder.Script()
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to generate signing script")
+	}
+
+	txInput.SignatureScript = script
+
+	return txInput, nil
+}
+
+func createRedeemScriptV1(publicKey *HDPublicKey) ([]byte, error) {
+
+	userAddress, err := btcutil.NewAddressPubKey(publicKey.Raw(), publicKey.Network.network)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to generate address for user")
+	}
+
+	return txscript.PayToAddrScript(userAddress.AddressPubKeyHash())
+}
+
+func signInputV1(input Input, index int, tx *wire.MsgTx, privateKey *HDPrivateKey) ([]byte, error) {
+
+	redeemScript, err := createRedeemScriptV1(privateKey.PublicKey())
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to build reedem script for signing")
+	}
+
+	privKey, err := privateKey.key.ECPrivKey()
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to produce EC priv key for signing")
+	}
+
+	sig, err := txscript.RawTxInSignature(tx, index, redeemScript, txscript.SigHashAll, privKey)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to sign V1 input")
+	}
+
+	return sig, nil
+}