Release v0.3.0

vendor/github.com/muun/libwallet/addresses/v3.go

@@ -0,0 +1,55 @@
+package addresses
+
+import (
+	"crypto/sha256"
+
+	"github.com/btcsuite/btcd/chaincfg"
+
+	"github.com/btcsuite/btcd/txscript"
+	"github.com/btcsuite/btcutil"
+	"github.com/btcsuite/btcutil/hdkeychain"
+	"github.com/pkg/errors"
+)
+
+func CreateAddressV3(userKey, muunKey *hdkeychain.ExtendedKey, path string, network *chaincfg.Params) (*WalletAddress, error) {
+
+	redeemScript, err := CreateRedeemScriptV3(userKey, muunKey, network)
+	if err != nil {
+		return nil, err
+	}
+
+	address, err := btcutil.NewAddressScriptHash(redeemScript, network)
+	if err != nil {
+		return nil, err
+	}
+
+	return &WalletAddress{
+		address:        address.EncodeAddress(),
+		version:        V3,
+		derivationPath: path,
+	}, nil
+}
+
+func CreateRedeemScriptV3(userKey, muunKey *hdkeychain.ExtendedKey, network *chaincfg.Params) ([]byte, error) {
+	witnessScript, err := CreateWitnessScriptV3(userKey, muunKey, network)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to generate redeem script v3")
+	}
+
+	return createNonNativeSegwitRedeemScript(witnessScript)
+}
+
+func CreateWitnessScriptV3(userKey, muunKey *hdkeychain.ExtendedKey, network *chaincfg.Params) ([]byte, error) {
+	// createMultisigRedeemScript creates a valid script for both V2 and V3 schemes
+	return createMultisigRedeemScript(userKey, muunKey, network)
+}
+
+func createNonNativeSegwitRedeemScript(witnessScript []byte) ([]byte, error) {
+	witnessScriptHash := sha256.Sum256(witnessScript)
+
+	builder := txscript.NewScriptBuilder()
+	builder.AddInt64(0)
+	builder.AddData(witnessScriptHash[:])
+
+	return builder.Script()
+}