multi: bump btcec/v2 and btcutil to new versions

internal/test/testutils.go

@@ -8,9 +8,9 @@ import (
 	"testing"
 	"time"
 
-	"github.com/btcsuite/btcd/btcec"
+	"github.com/btcsuite/btcd/btcec/v2/ecdsa"
+	"github.com/btcsuite/btcd/btcutil"
 	"github.com/btcsuite/btcd/chaincfg"
-	"github.com/btcsuite/btcutil"
 	"github.com/lightningnetwork/lnd/lntypes"
 	"github.com/lightningnetwork/lnd/lnwire"
 	"github.com/lightningnetwork/lnd/zpay32"
@@ -44,17 +44,14 @@ func EncodePayReq(payReq *zpay32.Invoice) (string, error) {
 	reqString, err := payReq.Encode(
 		zpay32.MessageSigner{
 			SignCompact: func(hash []byte) ([]byte, error) {
-				// btcec.SignCompact returns a
+				// ecdsa.SignCompact returns a
 				// pubkey-recoverable signature
-				sig, err := btcec.SignCompact(
-					btcec.S256(),
-					privKey,
-					payReq.PaymentHash[:],
-					true,
+				sig, err := ecdsa.SignCompact(
+					privKey, payReq.PaymentHash[:], true,
 				)
 				if err != nil {
-					return nil, fmt.Errorf(
-						"can't sign the hash: %v", err)
+					return nil, fmt.Errorf("can't sign "+
+						"the hash: %v", err)
 				}
 
 				return sig, nil