lnwallet: extract SignDescriptor serialization and witness generator

2025-11-12 07:08:24 +01:00 · 2017-05-07 04:04:28 -07:00
parent f0aa186a56
commit d8c56433e3
5 changed files with 324 additions and 50 deletions
--- a/lnwallet/signdescriptor_test.go
+++ b/lnwallet/signdescriptor_test.go
@@ -0,0 +1,122 @@
+package lnwallet
+
+import (
+	"bytes"
+	"reflect"
+	"testing"
+
+	"github.com/roasbeef/btcd/btcec"
+	"github.com/roasbeef/btcd/txscript"
+	"github.com/roasbeef/btcd/wire"
+)
+
+func TestSignDescriptorSerialization(t *testing.T) {
+	keys := [][]byte{
+		{0x04, 0x11, 0xdb, 0x93, 0xe1, 0xdc, 0xdb, 0x8a,
+			0x01, 0x6b, 0x49, 0x84, 0x0f, 0x8c, 0x53, 0xbc, 0x1e,
+			0xb6, 0x8a, 0x38, 0x2e, 0x97, 0xb1, 0x48, 0x2e, 0xca,
+			0xd7, 0xb1, 0x48, 0xa6, 0x90, 0x9a, 0x5c, 0xb2, 0xe0,
+			0xea, 0xdd, 0xfb, 0x84, 0xcc, 0xf9, 0x74, 0x44, 0x64,
+			0xf8, 0x2e, 0x16, 0x0b, 0xfa, 0x9b, 0x8b, 0x64, 0xf9,
+			0xd4, 0xc0, 0x3f, 0x99, 0x9b, 0x86, 0x43, 0xf6, 0x56,
+			0xb4, 0x12, 0xa3,
+		},
+		{0x04, 0x11, 0xdb, 0x93, 0xe1, 0xdc, 0xdb, 0x8a,
+			0x01, 0x6b, 0x49, 0x84, 0x0f, 0x8c, 0x53, 0xbc, 0x1e,
+			0xb6, 0x8a, 0x38, 0x2e, 0x97, 0xb1, 0x48, 0x2e, 0xca,
+			0xd7, 0xb1, 0x48, 0xa6, 0x90, 0x9a, 0x5c, 0xb2, 0xe0,
+			0xea, 0xdd, 0xfb, 0x84, 0xcc, 0xf9, 0x74, 0x44, 0x64,
+			0xf8, 0x2e, 0x16, 0x0b, 0xfa, 0x9b, 0x8b, 0x64, 0xf9,
+			0xd4, 0xc0, 0x3f, 0x99, 0x9b, 0x86, 0x43, 0xf6, 0x56,
+			0xb4, 0x12, 0xa3,
+		},
+	}
+
+	signDescriptors := []SignDescriptor{
+		{
+			PrivateTweak: []byte{
+				0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
+				0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
+				0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
+				0x02, 0x02, 0x02, 0x02, 0x02,
+			},
+			WitnessScript: []byte{
+				0x00, 0x14, 0xee, 0x91, 0x41, 0x7e, 0x85, 0x6c, 0xde,
+				0x10, 0xa2, 0x91, 0x1e, 0xdc, 0xbd, 0xbd, 0x69, 0xe2,
+				0xef, 0xb5, 0x71, 0x48,
+			},
+			Output: &wire.TxOut{
+				Value: 5000000000,
+				PkScript: []byte{
+					0x41, // OP_DATA_65
+					0x04, 0xd6, 0x4b, 0xdf, 0xd0, 0x9e, 0xb1, 0xc5,
+					0xfe, 0x29, 0x5a, 0xbd, 0xeb, 0x1d, 0xca, 0x42,
+					0x81, 0xbe, 0x98, 0x8e, 0x2d, 0xa0, 0xb6, 0xc1,
+					0xc6, 0xa5, 0x9d, 0xc2, 0x26, 0xc2, 0x86, 0x24,
+					0xe1, 0x81, 0x75, 0xe8, 0x51, 0xc9, 0x6b, 0x97,
+					0x3d, 0x81, 0xb0, 0x1c, 0xc3, 0x1f, 0x04, 0x78,
+					0x34, 0xbc, 0x06, 0xd6, 0xd6, 0xed, 0xf6, 0x20,
+					0xd1, 0x84, 0x24, 0x1a, 0x6a, 0xed, 0x8b, 0x63,
+					0xa6, // 65-byte signature
+					0xac, // OP_CHECKSIG
+				},
+			},
+			HashType: txscript.SigHashAll,
+		},
+
+		// Test serializing a SignDescriptor with a nil-valued PrivateTweak
+		{
+			PrivateTweak: nil,
+			WitnessScript: []byte{
+				0x00, 0x14, 0xee, 0x91, 0x41, 0x7e, 0x85, 0x6c, 0xde,
+				0x10, 0xa2, 0x91, 0x1e, 0xdc, 0xbd, 0xbd, 0x69, 0xe2,
+				0xef, 0xb5, 0x71, 0x48,
+			},
+			Output: &wire.TxOut{
+				Value: 5000000000,
+				PkScript: []byte{
+					0x41, // OP_DATA_65
+					0x04, 0xd6, 0x4b, 0xdf, 0xd0, 0x9e, 0xb1, 0xc5,
+					0xfe, 0x29, 0x5a, 0xbd, 0xeb, 0x1d, 0xca, 0x42,
+					0x81, 0xbe, 0x98, 0x8e, 0x2d, 0xa0, 0xb6, 0xc1,
+					0xc6, 0xa5, 0x9d, 0xc2, 0x26, 0xc2, 0x86, 0x24,
+					0xe1, 0x81, 0x75, 0xe8, 0x51, 0xc9, 0x6b, 0x97,
+					0x3d, 0x81, 0xb0, 0x1c, 0xc3, 0x1f, 0x04, 0x78,
+					0x34, 0xbc, 0x06, 0xd6, 0xd6, 0xed, 0xf6, 0x20,
+					0xd1, 0x84, 0x24, 0x1a, 0x6a, 0xed, 0x8b, 0x63,
+					0xa6, // 65-byte signature
+					0xac, // OP_CHECKSIG
+				},
+			},
+			HashType: txscript.SigHashAll,
+		},
+	}
+
+	for i := 0; i < len(signDescriptors); i++ {
+		// Parse pubkeys for each sign descriptor.
+		sd := &signDescriptors[i]
+		pubkey, err := btcec.ParsePubKey(keys[i], btcec.S256())
+		if err != nil {
+			t.Fatalf("unable to parse pubkey: %v", err)
+		}
+		sd.PubKey = pubkey
+
+		// Test that serialize -> deserialize yields same result as original.
+		var buf bytes.Buffer
+		if err := WriteSignDescriptor(&buf, sd); err != nil {
+			t.Fatalf("unable to serialize sign descriptor[%v]: %v", i, sd)
+		}
+
+		desSd := &SignDescriptor{}
+		if err := ReadSignDescriptor(&buf, desSd); err != nil {
+			t.Fatalf("unable to deserialize sign descriptor[%v]: %v", i, sd)
+		}
+
+		if !reflect.DeepEqual(sd, desSd) {
+			t.Fatalf("original and deserialized sign descriptors not equal:\n"+
+				"original     : %+v\n"+
+				"deserialized : %+v\n",
+				sd, desSd)
+		}
+	}
+}