From 641b4c8262f37541489a80a3c22854aa57ddcff3 Mon Sep 17 00:00:00 2001
From: Marko Bencun <marko@shiftcrypto.ch>
Date: Thu, 13 Feb 2025 12:06:21 +0100
Subject: [PATCH 1/6] simulator tests: capture simulator stdout

Can be used to check if e.g. the firmware displays the expected
confirmations to the user.

Similar to https://github.com/BitBoxSwiss/bitbox-wallet-app/commit/e2ef67936d587afa78f730fc7c22fb6c79893e74.
---
 api/firmware/backup_test.go   |  3 ++-
 api/firmware/bip85_test.go    |  3 ++-
 api/firmware/btc_test.go      | 16 ++++++-----
 api/firmware/cardano_test.go  |  5 ++--
 api/firmware/device_test.go   | 51 +++++++++++++++++++++++------------
 api/firmware/eth_test.go      | 11 ++++----
 api/firmware/mnemonic_test.go |  5 ++--
 api/firmware/sdcard_test.go   |  5 ++--
 api/firmware/system_test.go   |  5 ++--
 cmd/miniscript/main.go        |  1 +
 cmd/paymentrequest/main.go    |  1 +
 11 files changed, 68 insertions(+), 38 deletions(-)

diff --git a/api/firmware/backup_test.go b/api/firmware/backup_test.go
index 9d23f25..908df9a 100644
--- a/api/firmware/backup_test.go
+++ b/api/firmware/backup_test.go
@@ -15,6 +15,7 @@
 package firmware
 
 import (
+	"bytes"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -23,7 +24,7 @@ import (
 func TestSimulatorBackups(t *testing.T) {
 	const seedLen = 32
 	const testName = "test wallet name"
-	testSimulatorsAfterPairing(t, func(t *testing.T, device *Device) {
+	testSimulatorsAfterPairing(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		require.NoError(t, device.SetDeviceName(testName))
 
diff --git a/api/firmware/bip85_test.go b/api/firmware/bip85_test.go
index 37914e6..9e8b3a4 100644
--- a/api/firmware/bip85_test.go
+++ b/api/firmware/bip85_test.go
@@ -15,6 +15,7 @@
 package firmware
 
 import (
+	"bytes"
 	"encoding/hex"
 	"testing"
 
@@ -27,7 +28,7 @@ func TestSimulatorBIP85AppBip39(t *testing.T) {
 }
 
 func TestSimulatorBIP85AppLN(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		entropy, err := device.BIP85AppLN()
 		require.NoError(t, err)
diff --git a/api/firmware/btc_test.go b/api/firmware/btc_test.go
index 12438ee..c0c763e 100644
--- a/api/firmware/btc_test.go
+++ b/api/firmware/btc_test.go
@@ -16,6 +16,7 @@
 package firmware
 
 import (
+	"bytes"
 	"errors"
 	"testing"
 
@@ -68,7 +69,7 @@ func TestNewXPub(t *testing.T) {
 }
 
 func TestBTCXpub(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		xpub, err := device.BTCXPub(messages.BTCCoin_TBTC, []uint32{
 			49 + hardenedKeyStart,
@@ -81,7 +82,7 @@ func TestBTCXpub(t *testing.T) {
 }
 
 func TestBTCAddress(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		address, err := device.BTCAddress(
 			messages.BTCCoin_TBTC,
@@ -114,7 +115,7 @@ func simulatorPub(t *testing.T, device *Device, keypath ...uint32) *btcec.Public
 }
 
 func TestSimulatorBTCSignMessage(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		coin := messages.BTCCoin_BTC
 		keypath := []uint32{49 + hardenedKeyStart, 0 + hardenedKeyStart, 0 + hardenedKeyStart, 0, 10}
@@ -341,7 +342,7 @@ func makeTaprootOutput(t *testing.T, pubkey *btcec.PublicKey) (*btcec.PublicKey,
 
 // Test signing; all inputs are BIP86 Taproot keyspends.
 func TestSimulatorBTCSignTaprootKeySpend(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		coin := messages.BTCCoin_BTC
 		accountKeypath := []uint32{86 + hardenedKeyStart, 0 + hardenedKeyStart, 0 + hardenedKeyStart}
@@ -385,6 +386,7 @@ func TestSimulatorBTCSignTaprootKeySpend(t *testing.T) {
 		_, _, err := device.BTCSign(
 			coin,
 			scriptConfigs,
+			nil,
 			&BTCTx{
 				Version: 2,
 				Inputs: []*BTCTxInput{
@@ -431,7 +433,7 @@ func TestSimulatorBTCSignTaprootKeySpend(t *testing.T) {
 
 // Test signing; mixed input types (p2wpkh, p2wpkh-p2sh, p2tr)
 func TestSimulatorBTCSignMixed(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		coin := messages.BTCCoin_BTC
 		changeKeypath := []uint32{86 + hardenedKeyStart, 0 + hardenedKeyStart, 0 + hardenedKeyStart, 1, 0}
@@ -513,6 +515,7 @@ func TestSimulatorBTCSignMixed(t *testing.T) {
 		_, _, err := device.BTCSign(
 			coin,
 			scriptConfigs,
+			nil,
 			&BTCTx{
 				Version: 2,
 				Inputs: []*BTCTxInput{
@@ -573,7 +576,7 @@ func TestSimulatorBTCSignMixed(t *testing.T) {
 // Test that we can send to a silent payment output (generated by the BitBox) and verify the
 // corresponding DLEQ proof on the host that the output was generated correctly.
 func TestSimulatorBTCSignSilentPayment(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		coin := messages.BTCCoin_BTC
 		accountKeypath := []uint32{86 + hardenedKeyStart, 0 + hardenedKeyStart, 0 + hardenedKeyStart}
@@ -614,6 +617,7 @@ func TestSimulatorBTCSignSilentPayment(t *testing.T) {
 					Keypath:      accountKeypath,
 				},
 			},
+			nil,
 			&BTCTx{
 				Version: 2,
 				Inputs: []*BTCTxInput{
diff --git a/api/firmware/cardano_test.go b/api/firmware/cardano_test.go
index 2c82bf5..f3abeb5 100644
--- a/api/firmware/cardano_test.go
+++ b/api/firmware/cardano_test.go
@@ -15,6 +15,7 @@
 package firmware
 
 import (
+	"bytes"
 	"encoding/hex"
 	"testing"
 
@@ -23,7 +24,7 @@ import (
 )
 
 func TestSimulatorCardanoXPubs(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		xpubs, err := device.CardanoXPubs(
 			[][]uint32{
@@ -45,7 +46,7 @@ func TestSimulatorCardanoXPubs(t *testing.T) {
 }
 
 func TestSimulatorCardanoAddress(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		const account = uint32(1)
 		const rolePayment = uint32(0)     // receive
diff --git a/api/firmware/device_test.go b/api/firmware/device_test.go
index f71be7f..400ee08 100644
--- a/api/firmware/device_test.go
+++ b/api/firmware/device_test.go
@@ -16,6 +16,8 @@
 package firmware
 
 import (
+	"bufio"
+	"bytes"
 	"crypto/rand"
 	"crypto/sha256"
 	"encoding/hex"
@@ -45,13 +47,28 @@ import (
 	"google.golang.org/protobuf/proto"
 )
 
-func runSimulator(filename string) (func() error, *Device, error) {
-	cmd := exec.Command(filename)
+func runSimulator(filename string) (func() error, *Device, *bytes.Buffer, error) {
+	cmd := exec.Command("stdbuf", "-oL", filename)
+
+	// Create pipe before starting process
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, nil, nil, err
+	}
 	if err := cmd.Start(); err != nil {
-		return nil, nil, err
+		return nil, nil, nil, err
 	}
+
+	var stdoutBuf bytes.Buffer
+	scanner := bufio.NewScanner(stdout)
+	go func() {
+		for scanner.Scan() {
+			stdoutBuf.Write(scanner.Bytes())
+			stdoutBuf.WriteByte('\n')
+		}
+	}()
+
 	var conn net.Conn
-	var err error
 	for range 200 {
 		conn, err = net.Dial("tcp", "localhost:15423")
 		if err == nil {
@@ -60,7 +77,7 @@ func runSimulator(filename string) (func() error, *Device, error) {
 		time.Sleep(10 * time.Millisecond)
 	}
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, nil, err
 	}
 	const bitboxCMD = 0x80 + 0x40 + 0x01
 
@@ -73,7 +90,7 @@ func runSimulator(filename string) (func() error, *Device, error) {
 			return err
 		}
 		return cmd.Process.Kill()
-	}, device, nil
+	}, device, &stdoutBuf, nil
 }
 
 // Download BitBox simulators based on testdata/simulators.json to testdata/simulators/*.
@@ -162,7 +179,7 @@ func downloadSimulators() ([]string, error) {
 var downloadSimulatorsOnce = sync.OnceValues(downloadSimulators)
 
 // Runs tests against a simulator which is not initialized (not paired, not seeded).
-func testSimulators(t *testing.T, run func(*testing.T, *Device)) {
+func testSimulators(t *testing.T, run func(*testing.T, *Device, *bytes.Buffer)) {
 	t.Helper()
 	if runtime.GOOS != "linux" || runtime.GOARCH != "amd64" {
 		t.Skip("Skipping simulator tests: not running on linux-amd64")
@@ -180,39 +197,39 @@ func testSimulators(t *testing.T, run func(*testing.T, *Device)) {
 
 	for _, simulatorFilename := range simulatorFilenames {
 		t.Run(filepath.Base(simulatorFilename), func(t *testing.T) {
-			teardown, device, err := runSimulator(simulatorFilename)
+			teardown, device, stdOut, err := runSimulator(simulatorFilename)
 			require.NoError(t, err)
 			defer func() { require.NoError(t, teardown()) }()
-			run(t, device)
+			run(t, device, stdOut)
 		})
 	}
 }
 
 // Runs tests against a simulator which is not initialized, but paired (not seeded).
-func testSimulatorsAfterPairing(t *testing.T, run func(*testing.T, *Device)) {
+func testSimulatorsAfterPairing(t *testing.T, run func(*testing.T, *Device, *bytes.Buffer)) {
 	t.Helper()
-	testSimulators(t, func(t *testing.T, device *Device) {
+	testSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		require.NoError(t, device.Init())
 		device.ChannelHashVerify(true)
-		run(t, device)
+		run(t, device, stdOut)
 	})
 }
 
 // Runs tests againt a simulator that is seeded with this mnemonic: boring mistake dish oyster truth
 // pigeon viable emerge sort crash wire portion cannon couple enact box walk height pull today solid
 // off enable tide
-func testInitializedSimulators(t *testing.T, run func(*testing.T, *Device)) {
+func testInitializedSimulators(t *testing.T, run func(*testing.T, *Device, *bytes.Buffer)) {
 	t.Helper()
-	testSimulatorsAfterPairing(t, func(t *testing.T, device *Device) {
+	testSimulatorsAfterPairing(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		require.NoError(t, device.RestoreFromMnemonic())
-		run(t, device)
+		run(t, device, stdOut)
 	})
 }
 
 func TestSimulatorRootFingerprint(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		fp, err := device.RootFingerprint()
 		require.NoError(t, err)
@@ -492,7 +509,7 @@ func TestVersion(t *testing.T) {
 }
 
 func TestSimulatorProduct(t *testing.T) {
-	testSimulators(t, func(t *testing.T, device *Device) {
+	testSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		require.NoError(t, device.Init())
 		require.Equal(t, common.ProductBitBox02Multi, device.Product())
diff --git a/api/firmware/eth_test.go b/api/firmware/eth_test.go
index 1706152..3a546cf 100644
--- a/api/firmware/eth_test.go
+++ b/api/firmware/eth_test.go
@@ -15,6 +15,7 @@
 package firmware
 
 import (
+	"bytes"
 	"math/big"
 	"testing"
 
@@ -247,7 +248,7 @@ func TestEncodeValue(t *testing.T) {
 }
 
 func TestSimulatorETHPub(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		chainID := uint64(1)
 		xpub, err := device.ETHPub(
@@ -290,7 +291,7 @@ func TestSimulatorETHPub(t *testing.T) {
 }
 
 func TestSimulatorETHSignMessage(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		chainID := uint64(1)
 		keypath := []uint32{
@@ -315,7 +316,7 @@ func TestSimulatorETHSignMessage(t *testing.T) {
 }
 
 func TestSimulatorETHSignTypedMessage(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		msg := []byte(`
 {
@@ -381,7 +382,7 @@ func TestSimulatorETHSignTypedMessage(t *testing.T) {
 }
 
 func TestSimulatorETHSign(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		chainID := uint64(1)
 		keypath := []uint32{
@@ -416,7 +417,7 @@ func TestSimulatorETHSign(t *testing.T) {
 }
 
 func TestSimulatorETHSignEIP1559(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		chainID := uint64(1)
 		keypath := []uint32{
diff --git a/api/firmware/mnemonic_test.go b/api/firmware/mnemonic_test.go
index 530a588..e0fa024 100644
--- a/api/firmware/mnemonic_test.go
+++ b/api/firmware/mnemonic_test.go
@@ -15,20 +15,21 @@
 package firmware
 
 import (
+	"bytes"
 	"testing"
 
 	"github.com/stretchr/testify/require"
 )
 
 func TestSimulatorShowMnemonic(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		require.NoError(t, device.ShowMnemonic())
 	})
 }
 
 func TestSimulatorSetMnemonicPassphraseEnabled(t *testing.T) {
-	testInitializedSimulators(t, func(t *testing.T, device *Device) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		info, err := device.DeviceInfo()
 		require.NoError(t, err)
diff --git a/api/firmware/sdcard_test.go b/api/firmware/sdcard_test.go
index c054b26..20e856a 100644
--- a/api/firmware/sdcard_test.go
+++ b/api/firmware/sdcard_test.go
@@ -15,13 +15,14 @@
 package firmware
 
 import (
+	"bytes"
 	"testing"
 
 	"github.com/stretchr/testify/require"
 )
 
 func TestSimulatorCheckSDCard(t *testing.T) {
-	testSimulatorsAfterPairing(t, func(t *testing.T, device *Device) {
+	testSimulatorsAfterPairing(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		inserted, err := device.CheckSDCard()
 		require.NoError(t, err)
@@ -31,7 +32,7 @@ func TestSimulatorCheckSDCard(t *testing.T) {
 }
 
 func TestSimutorInsertSDCard(t *testing.T) {
-	testSimulatorsAfterPairing(t, func(t *testing.T, device *Device) {
+	testSimulatorsAfterPairing(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		require.NoError(t, device.InsertSDCard())
 	})
diff --git a/api/firmware/system_test.go b/api/firmware/system_test.go
index 416fb60..46e6583 100644
--- a/api/firmware/system_test.go
+++ b/api/firmware/system_test.go
@@ -15,6 +15,7 @@
 package firmware
 
 import (
+	"bytes"
 	"fmt"
 	"testing"
 
@@ -22,7 +23,7 @@ import (
 )
 
 func TestSimulatorDeviceName(t *testing.T) {
-	testSimulatorsAfterPairing(t, func(t *testing.T, device *Device) {
+	testSimulatorsAfterPairing(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		info, err := device.DeviceInfo()
 		require.NoError(t, err)
@@ -42,7 +43,7 @@ func TestSimulatorDeviceName(t *testing.T) {
 func TestSimulatorSetPassword(t *testing.T) {
 	for _, seedLen := range []int{16, 32} {
 		t.Run(fmt.Sprintf("seedLen=%d", seedLen), func(t *testing.T) {
-			testSimulatorsAfterPairing(t, func(t *testing.T, device *Device) {
+			testSimulatorsAfterPairing(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 				t.Helper()
 				require.NoError(t, device.SetPassword(seedLen))
 				require.Equal(t, StatusSeeded, device.Status())
diff --git a/cmd/miniscript/main.go b/cmd/miniscript/main.go
index 7747690..e56b996 100644
--- a/cmd/miniscript/main.go
+++ b/cmd/miniscript/main.go
@@ -339,6 +339,7 @@ func main() {
 					Keypath:      accountKeypath,
 				},
 			},
+			nil,
 			&firmware.BTCTx{
 				Version: uint32(withdrawalTransaction.Version),
 				Inputs: []*firmware.BTCTxInput{{
diff --git a/cmd/paymentrequest/main.go b/cmd/paymentrequest/main.go
index 8aa57fd..78e66f7 100644
--- a/cmd/paymentrequest/main.go
+++ b/cmd/paymentrequest/main.go
@@ -175,6 +175,7 @@ func main() {
 				Keypath:      []uint32{84 + HARDENED, 1 + HARDENED, 0 + HARDENED},
 			},
 		},
+		nil,
 		&firmware.BTCTx{
 			Version: 2,
 			Inputs: []*firmware.BTCTxInput{{

From 00887cdae8723125dd3b42f122a4040fea6a4a76 Mon Sep 17 00:00:00 2001
From: Marko Bencun <marko@shiftcrypto.ch>
Date: Thu, 30 Jan 2025 15:38:48 +0100
Subject: [PATCH 2/6] btc: add support for detecting self-sends to different
 accounts

Can only make use of it starting v9.22.0.

The .proto messages have been pulled from
https://github.com/BitBoxSwiss/bitbox02-firmware/tree/c35647384740683ab06309ff34b3395d5c026d58/messages
and the .pb.go files generated from it according to this repo's README instructions.

When sending coins to an address of the same keystore, but different
account, you can provide the script config of the other account in the
`outputScriptConfigs` and link the output to it.
---
 api/firmware/btc.go                 |   6 +
 api/firmware/btc_test.go            | 178 ++++++++
 api/firmware/messages/btc.pb.go     | 680 +++++++++++++++-------------
 api/firmware/messages/btc.proto     |  16 +-
 api/firmware/messages/cardano.pb.go | 515 ++++++++++++++-------
 api/firmware/messages/cardano.proto |  19 +-
 cmd/playground/main.go              |   1 +
 7 files changed, 930 insertions(+), 485 deletions(-)

diff --git a/api/firmware/btc.go b/api/firmware/btc.go
index 215ce22..f9b2b57 100644
--- a/api/firmware/btc.go
+++ b/api/firmware/btc.go
@@ -284,6 +284,7 @@ type BTCTx struct {
 func (device *Device) BTCSign(
 	coin messages.BTCCoin,
 	scriptConfigs []*messages.BTCScriptConfigWithKeypath,
+	outputScriptConfigs []*messages.BTCScriptConfigWithKeypath,
 	tx *BTCTx,
 	formatUnit messages.BTCSignInitRequest_FormatUnit,
 ) ([][]byte, map[int][]byte, error) {
@@ -310,6 +311,10 @@ func (device *Device) BTCSign(
 		return nil, nil, UnsupportedError("9.21.0")
 	}
 
+	if len(outputScriptConfigs) > 0 && !device.version.AtLeast(semver.NewSemVer(9, 22, 0)) {
+		return nil, nil, UnsupportedError("9.22.0")
+	}
+
 	signatures := make([][]byte, len(tx.Inputs))
 	next, err := device.queryBtcSign(&messages.Request{
 		Request: &messages.Request_BtcSignInit{
@@ -322,6 +327,7 @@ func (device *Device) BTCSign(
 				Locktime:                     tx.Locktime,
 				FormatUnit:                   formatUnit,
 				ContainsSilentPaymentOutputs: containsSilentPaymentOutputs,
+				OutputScriptConfigs:          outputScriptConfigs,
 			}}})
 	if err != nil {
 		return nil, nil, err
diff --git a/api/firmware/btc_test.go b/api/firmware/btc_test.go
index c0c763e..70bc8f3 100644
--- a/api/firmware/btc_test.go
+++ b/api/firmware/btc_test.go
@@ -37,6 +37,7 @@ import (
 
 const hardenedKeyStart = 0x80000000
 
+//nolint:unparam
 func mustOutpoint(s string) *wire.OutPoint {
 	outPoint, err := wire.NewOutPointFromString(s)
 	if err != nil {
@@ -675,3 +676,180 @@ func TestSimulatorBTCSignSilentPayment(t *testing.T) {
 		}
 	})
 }
+
+// Tests that the BitBox displays the output as being of the same account in a self-send.
+func TestSimulatorSignBTCTransactionSendSelfSameAccount(t *testing.T) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
+		t.Helper()
+		coin := messages.BTCCoin_BTC
+
+		input0Keypath := []uint32{86 + hardenedKeyStart, 0 + hardenedKeyStart, 0 + hardenedKeyStart, 0, 0}
+		input1Keypath := []uint32{86 + hardenedKeyStart, 0 + hardenedKeyStart, 0 + hardenedKeyStart, 0, 1}
+
+		prevTx := &wire.MsgTx{
+			Version: 2,
+			TxIn: []*wire.TxIn{
+				{
+					PreviousOutPoint: *mustOutpoint("3131313131313131313131313131313131313131313131313131313131313131:0"),
+					Sequence:         0xFFFFFFFF,
+				},
+			},
+			TxOut: []*wire.TxOut{
+				{
+					Value: 100_000_000,
+					PkScript: func() []byte {
+						_, script := makeTaprootOutput(t, simulatorPub(t, device, input0Keypath...))
+						return script
+					}(),
+				},
+			},
+			LockTime: 0,
+		}
+		convertedPrevTx := NewBTCPrevTxFromBtcd(prevTx)
+
+		scriptConfigs := []*messages.BTCScriptConfigWithKeypath{
+			{
+				ScriptConfig: NewBTCScriptConfigSimple(messages.BTCScriptConfig_P2TR),
+				Keypath:      input0Keypath[:3],
+			},
+		}
+
+		prevTxHash := prevTx.TxHash()
+		_, _, err := device.BTCSign(
+			coin,
+			scriptConfigs,
+			nil,
+			&BTCTx{
+				Version: 2,
+				Inputs: []*BTCTxInput{
+					{
+						Input: &messages.BTCSignInputRequest{
+							PrevOutHash:       prevTxHash[:],
+							PrevOutIndex:      0,
+							PrevOutValue:      uint64(prevTx.TxOut[0].Value),
+							Sequence:          0xFFFFFFFF,
+							Keypath:           input0Keypath,
+							ScriptConfigIndex: 0,
+						},
+						PrevTx: convertedPrevTx,
+					},
+				},
+				Outputs: []*messages.BTCSignOutputRequest{
+					{
+						Ours:    true,
+						Value:   70_000_000,
+						Keypath: input1Keypath,
+					},
+				},
+				Locktime: 0,
+			},
+			messages.BTCSignInitRequest_DEFAULT,
+		)
+		require.NoError(t, err)
+
+		switch {
+		// Display changed in v9.22.0.
+		case device.Version().AtLeast(semver.NewSemVer(9, 22, 0)):
+			require.Contains(t,
+				stdOut.String(),
+				"This BitBox (same account): bc1psz0tsdr9sgnukfcx4gtwpp5exyeqdycfqjvm2jw6tvsj3k3eavts20yuag",
+			)
+		case device.Version().AtLeast(semver.NewSemVer(9, 20, 0)):
+			require.Contains(t,
+				stdOut.String(),
+				"This BitBox02: bc1psz0tsdr9sgnukfcx4gtwpp5exyeqdycfqjvm2jw6tvsj3k3eavts20yuag",
+			)
+		}
+		// Before simulator v9.20, address confirmation data was not written to stdout.
+	})
+}
+
+// Tests that the BitBox displays the output as being of the same keystore, but different account.
+func TestSimulatorSignBTCTransactionSendSelfDifferentAccount(t *testing.T) {
+	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
+		t.Helper()
+		coin := messages.BTCCoin_BTC
+
+		input0Keypath := []uint32{86 + hardenedKeyStart, 0 + hardenedKeyStart, 0 + hardenedKeyStart, 0, 0}
+		input1Keypath := []uint32{86 + hardenedKeyStart, 0 + hardenedKeyStart, 1 + hardenedKeyStart, 0, 0}
+
+		prevTx := &wire.MsgTx{
+			Version: 2,
+			TxIn: []*wire.TxIn{
+				{
+					PreviousOutPoint: *mustOutpoint("3131313131313131313131313131313131313131313131313131313131313131:0"),
+					Sequence:         0xFFFFFFFF,
+				},
+			},
+			TxOut: []*wire.TxOut{
+				{
+					Value: 100_000_000,
+					PkScript: func() []byte {
+						_, script := makeTaprootOutput(t, simulatorPub(t, device, input0Keypath...))
+						return script
+					}(),
+				},
+			},
+			LockTime: 0,
+		}
+		convertedPrevTx := NewBTCPrevTxFromBtcd(prevTx)
+
+		scriptConfigs := []*messages.BTCScriptConfigWithKeypath{
+			{
+				ScriptConfig: NewBTCScriptConfigSimple(messages.BTCScriptConfig_P2TR),
+				Keypath:      input0Keypath[:3],
+			},
+		}
+		outputScriptConfigs := []*messages.BTCScriptConfigWithKeypath{
+			{
+				ScriptConfig: NewBTCScriptConfigSimple(messages.BTCScriptConfig_P2TR),
+				Keypath:      input1Keypath[:3],
+			},
+		}
+		outputScriptConfigIndex := uint32(0)
+
+		prevTxHash := prevTx.TxHash()
+		_, _, err := device.BTCSign(
+			coin,
+			scriptConfigs,
+			outputScriptConfigs,
+			&BTCTx{
+				Version: 2,
+				Inputs: []*BTCTxInput{
+					{
+						Input: &messages.BTCSignInputRequest{
+							PrevOutHash:       prevTxHash[:],
+							PrevOutIndex:      0,
+							PrevOutValue:      uint64(prevTx.TxOut[0].Value),
+							Sequence:          0xFFFFFFFF,
+							Keypath:           input0Keypath,
+							ScriptConfigIndex: 0,
+						},
+						PrevTx: convertedPrevTx,
+					},
+				},
+				Outputs: []*messages.BTCSignOutputRequest{
+					{
+						Ours:                    true,
+						Value:                   70_000_000,
+						Keypath:                 input1Keypath,
+						OutputScriptConfigIndex: &outputScriptConfigIndex,
+					},
+				},
+				Locktime: 0,
+			},
+			messages.BTCSignInitRequest_DEFAULT,
+		)
+
+		// Introduced in v9.22.0.
+		if !device.Version().AtLeast(semver.NewSemVer(9, 22, 0)) {
+			require.EqualError(t, err, UnsupportedError("9.22.0").Error())
+			return
+		}
+		require.NoError(t, err)
+		require.Contains(t,
+			stdOut.String(),
+			"This BitBox (account #2): bc1pzeyhtmk2d5jrjunam30dus0p34095m622dq7trm7r0g8pwac2gvqxh8d47",
+		)
+	})
+}
diff --git a/api/firmware/messages/btc.pb.go b/api/firmware/messages/btc.pb.go
index d80ba25..f3a4320 100644
--- a/api/firmware/messages/btc.pb.go
+++ b/api/firmware/messages/btc.pb.go
@@ -42,6 +42,8 @@ const (
 	BTCCoin_TBTC BTCCoin = 1
 	BTCCoin_LTC  BTCCoin = 2
 	BTCCoin_TLTC BTCCoin = 3
+	// Regtest
+	BTCCoin_RBTC BTCCoin = 4
 )
 
 // Enum value maps for BTCCoin.
@@ -51,12 +53,14 @@ var (
 		1: "TBTC",
 		2: "LTC",
 		3: "TLTC",
+		4: "RBTC",
 	}
 	BTCCoin_value = map[string]int32{
 		"BTC":  0,
 		"TBTC": 1,
 		"LTC":  2,
 		"TLTC": 3,
+		"RBTC": 4,
 	}
 )
 
@@ -741,6 +745,9 @@ type BTCSignInitRequest struct {
 	Locktime                     uint32                        `protobuf:"varint,7,opt,name=locktime,proto3" json:"locktime,omitempty"` // must be <500000000
 	FormatUnit                   BTCSignInitRequest_FormatUnit `protobuf:"varint,8,opt,name=format_unit,json=formatUnit,proto3,enum=shiftcrypto.bitbox02.BTCSignInitRequest_FormatUnit" json:"format_unit,omitempty"`
 	ContainsSilentPaymentOutputs bool                          `protobuf:"varint,9,opt,name=contains_silent_payment_outputs,json=containsSilentPaymentOutputs,proto3" json:"contains_silent_payment_outputs,omitempty"`
+	// used script configs for outputs that send to an address of the same keystore, but not
+	// necessarily the same account (as defined by `script_configs` above).
+	OutputScriptConfigs []*BTCScriptConfigWithKeypath `protobuf:"bytes,10,rep,name=output_script_configs,json=outputScriptConfigs,proto3" json:"output_script_configs,omitempty"`
 }
 
 func (x *BTCSignInitRequest) Reset() {
@@ -831,6 +838,13 @@ func (x *BTCSignInitRequest) GetContainsSilentPaymentOutputs() bool {
 	return false
 }
 
+func (x *BTCSignInitRequest) GetOutputScriptConfigs() []*BTCScriptConfigWithKeypath {
+	if x != nil {
+		return x.OutputScriptConfigs
+	}
+	return nil
+}
+
 type BTCSignNextResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -845,7 +859,7 @@ type BTCSignNextResponse struct {
 	// Previous tx's input/output index in case of PREV_INPUT or PREV_OUTPUT, for the input at `index`.
 	PrevIndex                  uint32                      `protobuf:"varint,5,opt,name=prev_index,json=prevIndex,proto3" json:"prev_index,omitempty"`
 	AntiKleptoSignerCommitment *AntiKleptoSignerCommitment `protobuf:"bytes,6,opt,name=anti_klepto_signer_commitment,json=antiKleptoSignerCommitment,proto3" json:"anti_klepto_signer_commitment,omitempty"`
-	// Generated output. The host *must* verify its correctness using silent_payment_dleq_proof.
+	// Generated output. The host *must* verify its correctness using `silent_payment_dleq_proof`.
 	GeneratedOutputPkscript []byte `protobuf:"bytes,7,opt,name=generated_output_pkscript,json=generatedOutputPkscript,proto3" json:"generated_output_pkscript,omitempty"`
 	SilentPaymentDleqProof  []byte `protobuf:"bytes,8,opt,name=silent_payment_dleq_proof,json=silentPaymentDleqProof,proto3" json:"silent_payment_dleq_proof,omitempty"`
 }
@@ -1045,12 +1059,19 @@ type BTCSignOutputRequest struct {
 	Value   uint64   `protobuf:"varint,3,opt,name=value,proto3" json:"value,omitempty"`
 	Payload []byte   `protobuf:"bytes,4,opt,name=payload,proto3" json:"payload,omitempty"`         // if ours is false. Renamed from `hash`.
 	Keypath []uint32 `protobuf:"varint,5,rep,packed,name=keypath,proto3" json:"keypath,omitempty"` // if ours is true
-	// If ours is true. References a script config from BTCSignInitRequest
+	// If ours is true and `output_script_config_index` is absent. References a script config from
+	// BTCSignInitRequest. This allows change output identification and allows us to identify
+	// non-change outputs to the same account, so we can display this info to the user.
 	ScriptConfigIndex   uint32  `protobuf:"varint,6,opt,name=script_config_index,json=scriptConfigIndex,proto3" json:"script_config_index,omitempty"`
 	PaymentRequestIndex *uint32 `protobuf:"varint,7,opt,name=payment_request_index,json=paymentRequestIndex,proto3,oneof" json:"payment_request_index,omitempty"`
 	// If provided, `type` and `payload` is ignored. The generated output pkScript is returned in
 	// BTCSignNextResponse. `contains_silent_payment_outputs` in the init request must be true.
 	SilentPayment *BTCSignOutputRequest_SilentPayment `protobuf:"bytes,8,opt,name=silent_payment,json=silentPayment,proto3" json:"silent_payment,omitempty"`
+	// If ours is true. If set, `script_config_index` is ignored. References an output script config
+	// from BTCSignInitRequest. This enables verification that an output belongs to the same keystore,
+	// even if it is from a different account than we spend from, allowing us to display this info to
+	// the user.
+	OutputScriptConfigIndex *uint32 `protobuf:"varint,9,opt,name=output_script_config_index,json=outputScriptConfigIndex,proto3,oneof" json:"output_script_config_index,omitempty"`
 }
 
 func (x *BTCSignOutputRequest) Reset() {
@@ -1141,6 +1162,13 @@ func (x *BTCSignOutputRequest) GetSilentPayment() *BTCSignOutputRequest_SilentPa
 	return nil
 }
 
+func (x *BTCSignOutputRequest) GetOutputScriptConfigIndex() uint32 {
+	if x != nil && x.OutputScriptConfigIndex != nil {
+		return *x.OutputScriptConfigIndex
+	}
+	return 0
+}
+
 type BTCScriptConfigRegistration struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -2462,7 +2490,7 @@ var file_btc_proto_rawDesc = []byte{
 	0x54, 0x43, 0x53, 0x63, 0x72, 0x69, 0x70, 0x74, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x52, 0x0c,
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 	0x67, 0x6e, 0x49, 0x6e, 0x69, 0x74, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x31, 0x0a,
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@@ -2489,295 +2517,308 @@ var file_btc_proto_rawDesc = []byte{
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 }
 
 var (
@@ -2845,42 +2886,43 @@ var file_btc_proto_depIdxs = []int32{
 	0,  // 7: shiftcrypto.bitbox02.BTCSignInitRequest.coin:type_name -> shiftcrypto.bitbox02.BTCCoin
 	10, // 8: shiftcrypto.bitbox02.BTCSignInitRequest.script_configs:type_name -> shiftcrypto.bitbox02.BTCScriptConfigWithKeypath
 	5,  // 9: shiftcrypto.bitbox02.BTCSignInitRequest.format_unit:type_name -> shiftcrypto.bitbox02.BTCSignInitRequest.FormatUnit
-	6,  // 10: shiftcrypto.bitbox02.BTCSignNextResponse.type:type_name -> shiftcrypto.bitbox02.BTCSignNextResponse.Type
-	33, // 11: shiftcrypto.bitbox02.BTCSignNextResponse.anti_klepto_signer_commitment:type_name -> shiftcrypto.bitbox02.AntiKleptoSignerCommitment
-	34, // 12: shiftcrypto.bitbox02.BTCSignInputRequest.host_nonce_commitment:type_name -> shiftcrypto.bitbox02.AntiKleptoHostNonceCommitment
-	1,  // 13: shiftcrypto.bitbox02.BTCSignOutputRequest.type:type_name -> shiftcrypto.bitbox02.BTCOutputType
-	30, // 14: shiftcrypto.bitbox02.BTCSignOutputRequest.silent_payment:type_name -> shiftcrypto.bitbox02.BTCSignOutputRequest.SilentPayment
-	0,  // 15: shiftcrypto.bitbox02.BTCScriptConfigRegistration.coin:type_name -> shiftcrypto.bitbox02.BTCCoin
-	8,  // 16: shiftcrypto.bitbox02.BTCScriptConfigRegistration.script_config:type_name -> shiftcrypto.bitbox02.BTCScriptConfig
-	15, // 17: shiftcrypto.bitbox02.BTCIsScriptConfigRegisteredRequest.registration:type_name -> shiftcrypto.bitbox02.BTCScriptConfigRegistration
-	15, // 18: shiftcrypto.bitbox02.BTCRegisterScriptConfigRequest.registration:type_name -> shiftcrypto.bitbox02.BTCScriptConfigRegistration
-	7,  // 19: shiftcrypto.bitbox02.BTCRegisterScriptConfigRequest.xpub_type:type_name -> shiftcrypto.bitbox02.BTCRegisterScriptConfigRequest.XPubType
-	31, // 20: shiftcrypto.bitbox02.BTCPaymentRequestRequest.memos:type_name -> shiftcrypto.bitbox02.BTCPaymentRequestRequest.Memo
-	0,  // 21: shiftcrypto.bitbox02.BTCSignMessageRequest.coin:type_name -> shiftcrypto.bitbox02.BTCCoin
-	10, // 22: shiftcrypto.bitbox02.BTCSignMessageRequest.script_config:type_name -> shiftcrypto.bitbox02.BTCScriptConfigWithKeypath
-	34, // 23: shiftcrypto.bitbox02.BTCSignMessageRequest.host_nonce_commitment:type_name -> shiftcrypto.bitbox02.AntiKleptoHostNonceCommitment
-	17, // 24: shiftcrypto.bitbox02.BTCRequest.is_script_config_registered:type_name -> shiftcrypto.bitbox02.BTCIsScriptConfigRegisteredRequest
-	19, // 25: shiftcrypto.bitbox02.BTCRequest.register_script_config:type_name -> shiftcrypto.bitbox02.BTCRegisterScriptConfigRequest
-	20, // 26: shiftcrypto.bitbox02.BTCRequest.prevtx_init:type_name -> shiftcrypto.bitbox02.BTCPrevTxInitRequest
-	21, // 27: shiftcrypto.bitbox02.BTCRequest.prevtx_input:type_name -> shiftcrypto.bitbox02.BTCPrevTxInputRequest
-	22, // 28: shiftcrypto.bitbox02.BTCRequest.prevtx_output:type_name -> shiftcrypto.bitbox02.BTCPrevTxOutputRequest
-	24, // 29: shiftcrypto.bitbox02.BTCRequest.sign_message:type_name -> shiftcrypto.bitbox02.BTCSignMessageRequest
-	35, // 30: shiftcrypto.bitbox02.BTCRequest.antiklepto_signature:type_name -> shiftcrypto.bitbox02.AntiKleptoSignatureRequest
-	23, // 31: shiftcrypto.bitbox02.BTCRequest.payment_request:type_name -> shiftcrypto.bitbox02.BTCPaymentRequestRequest
-	16, // 32: shiftcrypto.bitbox02.BTCResponse.success:type_name -> shiftcrypto.bitbox02.BTCSuccess
-	18, // 33: shiftcrypto.bitbox02.BTCResponse.is_script_config_registered:type_name -> shiftcrypto.bitbox02.BTCIsScriptConfigRegisteredResponse
-	12, // 34: shiftcrypto.bitbox02.BTCResponse.sign_next:type_name -> shiftcrypto.bitbox02.BTCSignNextResponse
-	25, // 35: shiftcrypto.bitbox02.BTCResponse.sign_message:type_name -> shiftcrypto.bitbox02.BTCSignMessageResponse
-	33, // 36: shiftcrypto.bitbox02.BTCResponse.antiklepto_signer_commitment:type_name -> shiftcrypto.bitbox02.AntiKleptoSignerCommitment
-	36, // 37: shiftcrypto.bitbox02.BTCScriptConfig.Multisig.xpubs:type_name -> shiftcrypto.bitbox02.XPub
-	3,  // 38: shiftcrypto.bitbox02.BTCScriptConfig.Multisig.script_type:type_name -> shiftcrypto.bitbox02.BTCScriptConfig.Multisig.ScriptType
-	37, // 39: shiftcrypto.bitbox02.BTCScriptConfig.Policy.keys:type_name -> shiftcrypto.bitbox02.KeyOriginInfo
-	32, // 40: shiftcrypto.bitbox02.BTCPaymentRequestRequest.Memo.text_memo:type_name -> shiftcrypto.bitbox02.BTCPaymentRequestRequest.Memo.TextMemo
-	41, // [41:41] is the sub-list for method output_type
-	41, // [41:41] is the sub-list for method input_type
-	41, // [41:41] is the sub-list for extension type_name
-	41, // [41:41] is the sub-list for extension extendee
-	0,  // [0:41] is the sub-list for field type_name
+	10, // 10: shiftcrypto.bitbox02.BTCSignInitRequest.output_script_configs:type_name -> shiftcrypto.bitbox02.BTCScriptConfigWithKeypath
+	6,  // 11: shiftcrypto.bitbox02.BTCSignNextResponse.type:type_name -> shiftcrypto.bitbox02.BTCSignNextResponse.Type
+	33, // 12: shiftcrypto.bitbox02.BTCSignNextResponse.anti_klepto_signer_commitment:type_name -> shiftcrypto.bitbox02.AntiKleptoSignerCommitment
+	34, // 13: shiftcrypto.bitbox02.BTCSignInputRequest.host_nonce_commitment:type_name -> shiftcrypto.bitbox02.AntiKleptoHostNonceCommitment
+	1,  // 14: shiftcrypto.bitbox02.BTCSignOutputRequest.type:type_name -> shiftcrypto.bitbox02.BTCOutputType
+	30, // 15: shiftcrypto.bitbox02.BTCSignOutputRequest.silent_payment:type_name -> shiftcrypto.bitbox02.BTCSignOutputRequest.SilentPayment
+	0,  // 16: shiftcrypto.bitbox02.BTCScriptConfigRegistration.coin:type_name -> shiftcrypto.bitbox02.BTCCoin
+	8,  // 17: shiftcrypto.bitbox02.BTCScriptConfigRegistration.script_config:type_name -> shiftcrypto.bitbox02.BTCScriptConfig
+	15, // 18: shiftcrypto.bitbox02.BTCIsScriptConfigRegisteredRequest.registration:type_name -> shiftcrypto.bitbox02.BTCScriptConfigRegistration
+	15, // 19: shiftcrypto.bitbox02.BTCRegisterScriptConfigRequest.registration:type_name -> shiftcrypto.bitbox02.BTCScriptConfigRegistration
+	7,  // 20: shiftcrypto.bitbox02.BTCRegisterScriptConfigRequest.xpub_type:type_name -> shiftcrypto.bitbox02.BTCRegisterScriptConfigRequest.XPubType
+	31, // 21: shiftcrypto.bitbox02.BTCPaymentRequestRequest.memos:type_name -> shiftcrypto.bitbox02.BTCPaymentRequestRequest.Memo
+	0,  // 22: shiftcrypto.bitbox02.BTCSignMessageRequest.coin:type_name -> shiftcrypto.bitbox02.BTCCoin
+	10, // 23: shiftcrypto.bitbox02.BTCSignMessageRequest.script_config:type_name -> shiftcrypto.bitbox02.BTCScriptConfigWithKeypath
+	34, // 24: shiftcrypto.bitbox02.BTCSignMessageRequest.host_nonce_commitment:type_name -> shiftcrypto.bitbox02.AntiKleptoHostNonceCommitment
+	17, // 25: shiftcrypto.bitbox02.BTCRequest.is_script_config_registered:type_name -> shiftcrypto.bitbox02.BTCIsScriptConfigRegisteredRequest
+	19, // 26: shiftcrypto.bitbox02.BTCRequest.register_script_config:type_name -> shiftcrypto.bitbox02.BTCRegisterScriptConfigRequest
+	20, // 27: shiftcrypto.bitbox02.BTCRequest.prevtx_init:type_name -> shiftcrypto.bitbox02.BTCPrevTxInitRequest
+	21, // 28: shiftcrypto.bitbox02.BTCRequest.prevtx_input:type_name -> shiftcrypto.bitbox02.BTCPrevTxInputRequest
+	22, // 29: shiftcrypto.bitbox02.BTCRequest.prevtx_output:type_name -> shiftcrypto.bitbox02.BTCPrevTxOutputRequest
+	24, // 30: shiftcrypto.bitbox02.BTCRequest.sign_message:type_name -> shiftcrypto.bitbox02.BTCSignMessageRequest
+	35, // 31: shiftcrypto.bitbox02.BTCRequest.antiklepto_signature:type_name -> shiftcrypto.bitbox02.AntiKleptoSignatureRequest
+	23, // 32: shiftcrypto.bitbox02.BTCRequest.payment_request:type_name -> shiftcrypto.bitbox02.BTCPaymentRequestRequest
+	16, // 33: shiftcrypto.bitbox02.BTCResponse.success:type_name -> shiftcrypto.bitbox02.BTCSuccess
+	18, // 34: shiftcrypto.bitbox02.BTCResponse.is_script_config_registered:type_name -> shiftcrypto.bitbox02.BTCIsScriptConfigRegisteredResponse
+	12, // 35: shiftcrypto.bitbox02.BTCResponse.sign_next:type_name -> shiftcrypto.bitbox02.BTCSignNextResponse
+	25, // 36: shiftcrypto.bitbox02.BTCResponse.sign_message:type_name -> shiftcrypto.bitbox02.BTCSignMessageResponse
+	33, // 37: shiftcrypto.bitbox02.BTCResponse.antiklepto_signer_commitment:type_name -> shiftcrypto.bitbox02.AntiKleptoSignerCommitment
+	36, // 38: shiftcrypto.bitbox02.BTCScriptConfig.Multisig.xpubs:type_name -> shiftcrypto.bitbox02.XPub
+	3,  // 39: shiftcrypto.bitbox02.BTCScriptConfig.Multisig.script_type:type_name -> shiftcrypto.bitbox02.BTCScriptConfig.Multisig.ScriptType
+	37, // 40: shiftcrypto.bitbox02.BTCScriptConfig.Policy.keys:type_name -> shiftcrypto.bitbox02.KeyOriginInfo
+	32, // 41: shiftcrypto.bitbox02.BTCPaymentRequestRequest.Memo.text_memo:type_name -> shiftcrypto.bitbox02.BTCPaymentRequestRequest.Memo.TextMemo
+	42, // [42:42] is the sub-list for method output_type
+	42, // [42:42] is the sub-list for method input_type
+	42, // [42:42] is the sub-list for extension type_name
+	42, // [42:42] is the sub-list for extension extendee
+	0,  // [0:42] is the sub-list for field type_name
 }
 
 func init() { file_btc_proto_init() }
diff --git a/api/firmware/messages/btc.proto b/api/firmware/messages/btc.proto
index 67db4db..7a49fe4 100644
--- a/api/firmware/messages/btc.proto
+++ b/api/firmware/messages/btc.proto
@@ -24,6 +24,8 @@ enum BTCCoin {
   TBTC = 1;
   LTC = 2;
   TLTC = 3;
+  // Regtest
+  RBTC = 4;
 };
 
 
@@ -113,6 +115,9 @@ message BTCSignInitRequest {
   }
   FormatUnit format_unit = 8;
   bool contains_silent_payment_outputs = 9;
+  // used script configs for outputs that send to an address of the same keystore, but not
+  // necessarily the same account (as defined by `script_configs` above).
+  repeated BTCScriptConfigWithKeypath output_script_configs = 10;
 }
 
 message BTCSignNextResponse {
@@ -136,7 +141,7 @@ message BTCSignNextResponse {
   // Previous tx's input/output index in case of PREV_INPUT or PREV_OUTPUT, for the input at `index`.
   uint32 prev_index = 5;
   AntiKleptoSignerCommitment anti_klepto_signer_commitment = 6;
-  // Generated output. The host *must* verify its correctness using silent_payment_dleq_proof.
+  // Generated output. The host *must* verify its correctness using `silent_payment_dleq_proof`.
   bytes generated_output_pkscript = 7;
   bytes silent_payment_dleq_proof = 8;
 }
@@ -172,12 +177,19 @@ message BTCSignOutputRequest {
   uint64 value = 3;
   bytes payload = 4; // if ours is false. Renamed from `hash`.
   repeated uint32 keypath = 5; // if ours is true
-  // If ours is true. References a script config from BTCSignInitRequest
+  // If ours is true and `output_script_config_index` is absent. References a script config from
+  // BTCSignInitRequest. This allows change output identification and allows us to identify
+  // non-change outputs to the same account, so we can display this info to the user.
   uint32 script_config_index = 6;
   optional uint32 payment_request_index = 7;
   // If provided, `type` and `payload` is ignored. The generated output pkScript is returned in
   // BTCSignNextResponse. `contains_silent_payment_outputs` in the init request must be true.
   SilentPayment silent_payment = 8;
+  // If ours is true. If set, `script_config_index` is ignored. References an output script config
+  // from BTCSignInitRequest. This enables verification that an output belongs to the same keystore,
+  // even if it is from a different account than we spend from, allowing us to display this info to
+  // the user.
+  optional uint32 output_script_config_index = 9;
 }
 
 message BTCScriptConfigRegistration {
diff --git a/api/firmware/messages/cardano.pb.go b/api/firmware/messages/cardano.pb.go
index 6b73916..c1d9f7f 100644
--- a/api/firmware/messages/cardano.pb.go
+++ b/api/firmware/messages/cardano.pb.go
@@ -80,6 +80,58 @@ func (CardanoNetwork) EnumDescriptor() ([]byte, []int) {
 	return file_cardano_proto_rawDescGZIP(), []int{0}
 }
 
+type CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType int32
+
+const (
+	CardanoSignTransactionRequest_Certificate_VoteDelegation_KEY_HASH             CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType = 0
+	CardanoSignTransactionRequest_Certificate_VoteDelegation_SCRIPT_HASH          CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType = 1
+	CardanoSignTransactionRequest_Certificate_VoteDelegation_ALWAYS_ABSTAIN       CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType = 2
+	CardanoSignTransactionRequest_Certificate_VoteDelegation_ALWAYS_NO_CONFIDENCE CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType = 3
+)
+
+// Enum value maps for CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType.
+var (
+	CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType_name = map[int32]string{
+		0: "KEY_HASH",
+		1: "SCRIPT_HASH",
+		2: "ALWAYS_ABSTAIN",
+		3: "ALWAYS_NO_CONFIDENCE",
+	}
+	CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType_value = map[string]int32{
+		"KEY_HASH":             0,
+		"SCRIPT_HASH":          1,
+		"ALWAYS_ABSTAIN":       2,
+		"ALWAYS_NO_CONFIDENCE": 3,
+	}
+)
+
+func (x CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType) Enum() *CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType {
+	p := new(CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType)
+	*p = x
+	return p
+}
+
+func (x CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType) Descriptor() protoreflect.EnumDescriptor {
+	return file_cardano_proto_enumTypes[1].Descriptor()
+}
+
+func (CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType) Type() protoreflect.EnumType {
+	return &file_cardano_proto_enumTypes[1]
+}
+
+func (x CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType.Descriptor instead.
+func (CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType) EnumDescriptor() ([]byte, []int) {
+	return file_cardano_proto_rawDescGZIP(), []int{4, 3, 1, 0}
+}
+
 type CardanoXpubsRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -329,6 +381,9 @@ type CardanoSignTransactionRequest struct {
 	Withdrawals           []*CardanoSignTransactionRequest_Withdrawal  `protobuf:"bytes,7,rep,name=withdrawals,proto3" json:"withdrawals,omitempty"`
 	ValidityIntervalStart uint64                                       `protobuf:"varint,8,opt,name=validity_interval_start,json=validityIntervalStart,proto3" json:"validity_interval_start,omitempty"`
 	AllowZeroTtl          bool                                         `protobuf:"varint,9,opt,name=allow_zero_ttl,json=allowZeroTtl,proto3" json:"allow_zero_ttl,omitempty"` // include ttl even if it is zero
+	// Tag arrays in the transaction serialization with the 258 tag.
+	// See https://github.com/IntersectMBO/cardano-ledger/blob/6e2d37cc0f47bd02e89b4ce9f78b59c35c958e96/eras/conway/impl/cddl-files/extra.cddl#L5
+	TagCborSets bool `protobuf:"varint,10,opt,name=tag_cbor_sets,json=tagCborSets,proto3" json:"tag_cbor_sets,omitempty"`
 }
 
 func (x *CardanoSignTransactionRequest) Reset() {
@@ -426,6 +481,13 @@ func (x *CardanoSignTransactionRequest) GetAllowZeroTtl() bool {
 	return false
 }
 
+func (x *CardanoSignTransactionRequest) GetTagCborSets() bool {
+	if x != nil {
+		return x.TagCborSets
+	}
+	return false
+}
+
 type CardanoSignTransactionResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -909,7 +971,7 @@ func (x *CardanoSignTransactionRequest_Output) GetAssetGroups() []*CardanoSignTr
 	return nil
 }
 
-// See https://github.com/input-output-hk/cardano-ledger-specs/blob/d0aa86ded0b973b09b629e5aa62aa1e71364d088/eras/alonzo/test-suite/cddl-files/alonzo.cddl#L150
+// See https://github.com/IntersectMBO/cardano-ledger/blob/cardano-ledger-conway-1.12.0.0/eras/conway/impl/cddl-files/conway.cddl#L273
 type CardanoSignTransactionRequest_Certificate struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -920,6 +982,7 @@ type CardanoSignTransactionRequest_Certificate struct {
 	//	*CardanoSignTransactionRequest_Certificate_StakeRegistration
 	//	*CardanoSignTransactionRequest_Certificate_StakeDeregistration
 	//	*CardanoSignTransactionRequest_Certificate_StakeDelegation_
+	//	*CardanoSignTransactionRequest_Certificate_VoteDelegation_
 	Cert isCardanoSignTransactionRequest_Certificate_Cert `protobuf_oneof:"cert"`
 }
 
@@ -983,6 +1046,13 @@ func (x *CardanoSignTransactionRequest_Certificate) GetStakeDelegation() *Cardan
 	return nil
 }
 
+func (x *CardanoSignTransactionRequest_Certificate) GetVoteDelegation() *CardanoSignTransactionRequest_Certificate_VoteDelegation {
+	if x, ok := x.GetCert().(*CardanoSignTransactionRequest_Certificate_VoteDelegation_); ok {
+		return x.VoteDelegation
+	}
+	return nil
+}
+
 type isCardanoSignTransactionRequest_Certificate_Cert interface {
 	isCardanoSignTransactionRequest_Certificate_Cert()
 }
@@ -999,6 +1069,10 @@ type CardanoSignTransactionRequest_Certificate_StakeDelegation_ struct {
 	StakeDelegation *CardanoSignTransactionRequest_Certificate_StakeDelegation `protobuf:"bytes,3,opt,name=stake_delegation,json=stakeDelegation,proto3,oneof"`
 }
 
+type CardanoSignTransactionRequest_Certificate_VoteDelegation_ struct {
+	VoteDelegation *CardanoSignTransactionRequest_Certificate_VoteDelegation `protobuf:"bytes,10,opt,name=vote_delegation,json=voteDelegation,proto3,oneof"`
+}
+
 func (*CardanoSignTransactionRequest_Certificate_StakeRegistration) isCardanoSignTransactionRequest_Certificate_Cert() {
 }
 
@@ -1008,6 +1082,9 @@ func (*CardanoSignTransactionRequest_Certificate_StakeDeregistration) isCardanoS
 func (*CardanoSignTransactionRequest_Certificate_StakeDelegation_) isCardanoSignTransactionRequest_Certificate_Cert() {
 }
 
+func (*CardanoSignTransactionRequest_Certificate_VoteDelegation_) isCardanoSignTransactionRequest_Certificate_Cert() {
+}
+
 type CardanoSignTransactionRequest_Withdrawal struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1174,6 +1251,70 @@ func (x *CardanoSignTransactionRequest_Certificate_StakeDelegation) GetPoolKeyha
 	return nil
 }
 
+type CardanoSignTransactionRequest_Certificate_VoteDelegation struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// keypath in this instance refers to stake credential
+	Keypath      []uint32                                                                 `protobuf:"varint,1,rep,packed,name=keypath,proto3" json:"keypath,omitempty"`
+	Type         CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType `protobuf:"varint,2,opt,name=type,proto3,enum=shiftcrypto.bitbox02.CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType" json:"type,omitempty"`
+	DrepCredhash []byte                                                                   `protobuf:"bytes,3,opt,name=drep_credhash,json=drepCredhash,proto3,oneof" json:"drep_credhash,omitempty"`
+}
+
+func (x *CardanoSignTransactionRequest_Certificate_VoteDelegation) Reset() {
+	*x = CardanoSignTransactionRequest_Certificate_VoteDelegation{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cardano_proto_msgTypes[16]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CardanoSignTransactionRequest_Certificate_VoteDelegation) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CardanoSignTransactionRequest_Certificate_VoteDelegation) ProtoMessage() {}
+
+func (x *CardanoSignTransactionRequest_Certificate_VoteDelegation) ProtoReflect() protoreflect.Message {
+	mi := &file_cardano_proto_msgTypes[16]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CardanoSignTransactionRequest_Certificate_VoteDelegation.ProtoReflect.Descriptor instead.
+func (*CardanoSignTransactionRequest_Certificate_VoteDelegation) Descriptor() ([]byte, []int) {
+	return file_cardano_proto_rawDescGZIP(), []int{4, 3, 1}
+}
+
+func (x *CardanoSignTransactionRequest_Certificate_VoteDelegation) GetKeypath() []uint32 {
+	if x != nil {
+		return x.Keypath
+	}
+	return nil
+}
+
+func (x *CardanoSignTransactionRequest_Certificate_VoteDelegation) GetType() CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType {
+	if x != nil {
+		return x.Type
+	}
+	return CardanoSignTransactionRequest_Certificate_VoteDelegation_KEY_HASH
+}
+
+func (x *CardanoSignTransactionRequest_Certificate_VoteDelegation) GetDrepCredhash() []byte {
+	if x != nil {
+		return x.DrepCredhash
+	}
+	return nil
+}
+
 type CardanoSignTransactionResponse_ShelleyWitness struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1186,7 +1327,7 @@ type CardanoSignTransactionResponse_ShelleyWitness struct {
 func (x *CardanoSignTransactionResponse_ShelleyWitness) Reset() {
 	*x = CardanoSignTransactionResponse_ShelleyWitness{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_cardano_proto_msgTypes[16]
+		mi := &file_cardano_proto_msgTypes[17]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1199,7 +1340,7 @@ func (x *CardanoSignTransactionResponse_ShelleyWitness) String() string {
 func (*CardanoSignTransactionResponse_ShelleyWitness) ProtoMessage() {}
 
 func (x *CardanoSignTransactionResponse_ShelleyWitness) ProtoReflect() protoreflect.Message {
-	mi := &file_cardano_proto_msgTypes[16]
+	mi := &file_cardano_proto_msgTypes[17]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1267,8 +1408,8 @@ var file_cardano_proto_rawDesc = []byte{
 	0x03, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x29, 0x2e, 0x73, 0x68, 0x69, 0x66, 0x74, 0x63, 0x72, 0x79,
 	0x70, 0x74, 0x6f, 0x2e, 0x62, 0x69, 0x74, 0x62, 0x6f, 0x78, 0x30, 0x32, 0x2e, 0x43, 0x61, 0x72,
 	0x64, 0x61, 0x6e, 0x6f, 0x53, 0x63, 0x72, 0x69, 0x70, 0x74, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67,
-	0x52, 0x0c, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x22, 0xcb,
-	0x0c, 0x0a, 0x1d, 0x43, 0x61, 0x72, 0x64, 0x61, 0x6e, 0x6f, 0x53, 0x69, 0x67, 0x6e, 0x54, 0x72,
+	0x52, 0x0c, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x22, 0xa7,
+	0x10, 0x0a, 0x1d, 0x43, 0x61, 0x72, 0x64, 0x61, 0x6e, 0x6f, 0x53, 0x69, 0x67, 0x6e, 0x54, 0x72,
 	0x61, 0x6e, 0x73, 0x61, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74,
 	0x12, 0x3e, 0x0a, 0x07, 0x6e, 0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b, 0x18, 0x01, 0x20, 0x01, 0x28,
 	0x0e, 0x32, 0x24, 0x2e, 0x73, 0x68, 0x69, 0x66, 0x74, 0x63, 0x72, 0x79, 0x70, 0x74, 0x6f, 0x2e,
@@ -1305,121 +1446,151 @@ var file_cardano_proto_rawDesc = []byte{
 	0x6e, 0x74, 0x65, 0x72, 0x76, 0x61, 0x6c, 0x53, 0x74, 0x61, 0x72, 0x74, 0x12, 0x24, 0x0a, 0x0e,
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+	0x74, 0x6c, 0x12, 0x22, 0x0a, 0x0d, 0x74, 0x61, 0x67, 0x5f, 0x63, 0x62, 0x6f, 0x72, 0x5f, 0x73,
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+	0x12, 0x35, 0x0a, 0x03, 0x70, 0x75, 0x62, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x21, 0x2e,
+	0x73, 0x68, 0x69, 0x66, 0x74, 0x63, 0x72, 0x79, 0x70, 0x74, 0x6f, 0x2e, 0x62, 0x69, 0x74, 0x62,
+	0x6f, 0x78, 0x30, 0x32, 0x2e, 0x50, 0x75, 0x62, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65,
+	0x48, 0x00, 0x52, 0x03, 0x70, 0x75, 0x62, 0x12, 0x61, 0x0a, 0x10, 0x73, 0x69, 0x67, 0x6e, 0x5f,
+	0x74, 0x72, 0x61, 0x6e, 0x73, 0x61, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x18, 0x03, 0x20, 0x01, 0x28,
+	0x0b, 0x32, 0x34, 0x2e, 0x73, 0x68, 0x69, 0x66, 0x74, 0x63, 0x72, 0x79, 0x70, 0x74, 0x6f, 0x2e,
+	0x62, 0x69, 0x74, 0x62, 0x6f, 0x78, 0x30, 0x32, 0x2e, 0x43, 0x61, 0x72, 0x64, 0x61, 0x6e, 0x6f,
+	0x53, 0x69, 0x67, 0x6e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x61, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x52,
+	0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x48, 0x00, 0x52, 0x0f, 0x73, 0x69, 0x67, 0x6e, 0x54,
+	0x72, 0x61, 0x6e, 0x73, 0x61, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x42, 0x0a, 0x0a, 0x08, 0x72, 0x65,
+	0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x2a, 0x38, 0x0a, 0x0e, 0x43, 0x61, 0x72, 0x64, 0x61, 0x6e,
+	0x6f, 0x4e, 0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b, 0x12, 0x12, 0x0a, 0x0e, 0x43, 0x61, 0x72, 0x64,
+	0x61, 0x6e, 0x6f, 0x4d, 0x61, 0x69, 0x6e, 0x6e, 0x65, 0x74, 0x10, 0x00, 0x12, 0x12, 0x0a, 0x0e,
+	0x43, 0x61, 0x72, 0x64, 0x61, 0x6e, 0x6f, 0x54, 0x65, 0x73, 0x74, 0x6e, 0x65, 0x74, 0x10, 0x01,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -1434,58 +1605,62 @@ func file_cardano_proto_rawDescGZIP() []byte {
 	return file_cardano_proto_rawDescData
 }
 
-var file_cardano_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_cardano_proto_msgTypes = make([]protoimpl.MessageInfo, 17)
+var file_cardano_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
+var file_cardano_proto_msgTypes = make([]protoimpl.MessageInfo, 18)
 var file_cardano_proto_goTypes = []any{
-	(CardanoNetwork)(0),                                               // 0: shiftcrypto.bitbox02.CardanoNetwork
-	(*CardanoXpubsRequest)(nil),                                       // 1: shiftcrypto.bitbox02.CardanoXpubsRequest
-	(*CardanoXpubsResponse)(nil),                                      // 2: shiftcrypto.bitbox02.CardanoXpubsResponse
-	(*CardanoScriptConfig)(nil),                                       // 3: shiftcrypto.bitbox02.CardanoScriptConfig
-	(*CardanoAddressRequest)(nil),                                     // 4: shiftcrypto.bitbox02.CardanoAddressRequest
-	(*CardanoSignTransactionRequest)(nil),                             // 5: shiftcrypto.bitbox02.CardanoSignTransactionRequest
-	(*CardanoSignTransactionResponse)(nil),                            // 6: shiftcrypto.bitbox02.CardanoSignTransactionResponse
-	(*CardanoRequest)(nil),                                            // 7: shiftcrypto.bitbox02.CardanoRequest
-	(*CardanoResponse)(nil),                                           // 8: shiftcrypto.bitbox02.CardanoResponse
-	(*CardanoScriptConfig_PkhSkh)(nil),                                // 9: shiftcrypto.bitbox02.CardanoScriptConfig.PkhSkh
-	(*CardanoSignTransactionRequest_Input)(nil),                       // 10: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Input
-	(*CardanoSignTransactionRequest_AssetGroup)(nil),                  // 11: shiftcrypto.bitbox02.CardanoSignTransactionRequest.AssetGroup
-	(*CardanoSignTransactionRequest_Output)(nil),                      // 12: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Output
-	(*CardanoSignTransactionRequest_Certificate)(nil),                 // 13: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate
-	(*CardanoSignTransactionRequest_Withdrawal)(nil),                  // 14: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Withdrawal
-	(*CardanoSignTransactionRequest_AssetGroup_Token)(nil),            // 15: shiftcrypto.bitbox02.CardanoSignTransactionRequest.AssetGroup.Token
-	(*CardanoSignTransactionRequest_Certificate_StakeDelegation)(nil), // 16: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.StakeDelegation
-	(*CardanoSignTransactionResponse_ShelleyWitness)(nil),             // 17: shiftcrypto.bitbox02.CardanoSignTransactionResponse.ShelleyWitness
-	(*Keypath)(nil),                                                   // 18: shiftcrypto.bitbox02.Keypath
-	(*PubResponse)(nil),                                               // 19: shiftcrypto.bitbox02.PubResponse
+	(CardanoNetwork)(0), // 0: shiftcrypto.bitbox02.CardanoNetwork
+	(CardanoSignTransactionRequest_Certificate_VoteDelegation_CardanoDRepType)(0), // 1: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.VoteDelegation.CardanoDRepType
+	(*CardanoXpubsRequest)(nil),                                       // 2: shiftcrypto.bitbox02.CardanoXpubsRequest
+	(*CardanoXpubsResponse)(nil),                                      // 3: shiftcrypto.bitbox02.CardanoXpubsResponse
+	(*CardanoScriptConfig)(nil),                                       // 4: shiftcrypto.bitbox02.CardanoScriptConfig
+	(*CardanoAddressRequest)(nil),                                     // 5: shiftcrypto.bitbox02.CardanoAddressRequest
+	(*CardanoSignTransactionRequest)(nil),                             // 6: shiftcrypto.bitbox02.CardanoSignTransactionRequest
+	(*CardanoSignTransactionResponse)(nil),                            // 7: shiftcrypto.bitbox02.CardanoSignTransactionResponse
+	(*CardanoRequest)(nil),                                            // 8: shiftcrypto.bitbox02.CardanoRequest
+	(*CardanoResponse)(nil),                                           // 9: shiftcrypto.bitbox02.CardanoResponse
+	(*CardanoScriptConfig_PkhSkh)(nil),                                // 10: shiftcrypto.bitbox02.CardanoScriptConfig.PkhSkh
+	(*CardanoSignTransactionRequest_Input)(nil),                       // 11: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Input
+	(*CardanoSignTransactionRequest_AssetGroup)(nil),                  // 12: shiftcrypto.bitbox02.CardanoSignTransactionRequest.AssetGroup
+	(*CardanoSignTransactionRequest_Output)(nil),                      // 13: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Output
+	(*CardanoSignTransactionRequest_Certificate)(nil),                 // 14: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate
+	(*CardanoSignTransactionRequest_Withdrawal)(nil),                  // 15: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Withdrawal
+	(*CardanoSignTransactionRequest_AssetGroup_Token)(nil),            // 16: shiftcrypto.bitbox02.CardanoSignTransactionRequest.AssetGroup.Token
+	(*CardanoSignTransactionRequest_Certificate_StakeDelegation)(nil), // 17: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.StakeDelegation
+	(*CardanoSignTransactionRequest_Certificate_VoteDelegation)(nil),  // 18: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.VoteDelegation
+	(*CardanoSignTransactionResponse_ShelleyWitness)(nil),             // 19: shiftcrypto.bitbox02.CardanoSignTransactionResponse.ShelleyWitness
+	(*Keypath)(nil),     // 20: shiftcrypto.bitbox02.Keypath
+	(*PubResponse)(nil), // 21: shiftcrypto.bitbox02.PubResponse
 }
 var file_cardano_proto_depIdxs = []int32{
-	18, // 0: shiftcrypto.bitbox02.CardanoXpubsRequest.keypaths:type_name -> shiftcrypto.bitbox02.Keypath
-	9,  // 1: shiftcrypto.bitbox02.CardanoScriptConfig.pkh_skh:type_name -> shiftcrypto.bitbox02.CardanoScriptConfig.PkhSkh
+	20, // 0: shiftcrypto.bitbox02.CardanoXpubsRequest.keypaths:type_name -> shiftcrypto.bitbox02.Keypath
+	10, // 1: shiftcrypto.bitbox02.CardanoScriptConfig.pkh_skh:type_name -> shiftcrypto.bitbox02.CardanoScriptConfig.PkhSkh
 	0,  // 2: shiftcrypto.bitbox02.CardanoAddressRequest.network:type_name -> shiftcrypto.bitbox02.CardanoNetwork
-	3,  // 3: shiftcrypto.bitbox02.CardanoAddressRequest.script_config:type_name -> shiftcrypto.bitbox02.CardanoScriptConfig
+	4,  // 3: shiftcrypto.bitbox02.CardanoAddressRequest.script_config:type_name -> shiftcrypto.bitbox02.CardanoScriptConfig
 	0,  // 4: shiftcrypto.bitbox02.CardanoSignTransactionRequest.network:type_name -> shiftcrypto.bitbox02.CardanoNetwork
-	10, // 5: shiftcrypto.bitbox02.CardanoSignTransactionRequest.inputs:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.Input
-	12, // 6: shiftcrypto.bitbox02.CardanoSignTransactionRequest.outputs:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.Output
-	13, // 7: shiftcrypto.bitbox02.CardanoSignTransactionRequest.certificates:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate
-	14, // 8: shiftcrypto.bitbox02.CardanoSignTransactionRequest.withdrawals:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.Withdrawal
-	17, // 9: shiftcrypto.bitbox02.CardanoSignTransactionResponse.shelley_witnesses:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionResponse.ShelleyWitness
-	1,  // 10: shiftcrypto.bitbox02.CardanoRequest.xpubs:type_name -> shiftcrypto.bitbox02.CardanoXpubsRequest
-	4,  // 11: shiftcrypto.bitbox02.CardanoRequest.address:type_name -> shiftcrypto.bitbox02.CardanoAddressRequest
-	5,  // 12: shiftcrypto.bitbox02.CardanoRequest.sign_transaction:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest
-	2,  // 13: shiftcrypto.bitbox02.CardanoResponse.xpubs:type_name -> shiftcrypto.bitbox02.CardanoXpubsResponse
-	19, // 14: shiftcrypto.bitbox02.CardanoResponse.pub:type_name -> shiftcrypto.bitbox02.PubResponse
-	6,  // 15: shiftcrypto.bitbox02.CardanoResponse.sign_transaction:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionResponse
-	15, // 16: shiftcrypto.bitbox02.CardanoSignTransactionRequest.AssetGroup.tokens:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.AssetGroup.Token
-	3,  // 17: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Output.script_config:type_name -> shiftcrypto.bitbox02.CardanoScriptConfig
-	11, // 18: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Output.asset_groups:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.AssetGroup
-	18, // 19: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.stake_registration:type_name -> shiftcrypto.bitbox02.Keypath
-	18, // 20: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.stake_deregistration:type_name -> shiftcrypto.bitbox02.Keypath
-	16, // 21: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.stake_delegation:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.StakeDelegation
-	22, // [22:22] is the sub-list for method output_type
-	22, // [22:22] is the sub-list for method input_type
-	22, // [22:22] is the sub-list for extension type_name
-	22, // [22:22] is the sub-list for extension extendee
-	0,  // [0:22] is the sub-list for field type_name
+	11, // 5: shiftcrypto.bitbox02.CardanoSignTransactionRequest.inputs:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.Input
+	13, // 6: shiftcrypto.bitbox02.CardanoSignTransactionRequest.outputs:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.Output
+	14, // 7: shiftcrypto.bitbox02.CardanoSignTransactionRequest.certificates:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate
+	15, // 8: shiftcrypto.bitbox02.CardanoSignTransactionRequest.withdrawals:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.Withdrawal
+	19, // 9: shiftcrypto.bitbox02.CardanoSignTransactionResponse.shelley_witnesses:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionResponse.ShelleyWitness
+	2,  // 10: shiftcrypto.bitbox02.CardanoRequest.xpubs:type_name -> shiftcrypto.bitbox02.CardanoXpubsRequest
+	5,  // 11: shiftcrypto.bitbox02.CardanoRequest.address:type_name -> shiftcrypto.bitbox02.CardanoAddressRequest
+	6,  // 12: shiftcrypto.bitbox02.CardanoRequest.sign_transaction:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest
+	3,  // 13: shiftcrypto.bitbox02.CardanoResponse.xpubs:type_name -> shiftcrypto.bitbox02.CardanoXpubsResponse
+	21, // 14: shiftcrypto.bitbox02.CardanoResponse.pub:type_name -> shiftcrypto.bitbox02.PubResponse
+	7,  // 15: shiftcrypto.bitbox02.CardanoResponse.sign_transaction:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionResponse
+	16, // 16: shiftcrypto.bitbox02.CardanoSignTransactionRequest.AssetGroup.tokens:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.AssetGroup.Token
+	4,  // 17: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Output.script_config:type_name -> shiftcrypto.bitbox02.CardanoScriptConfig
+	12, // 18: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Output.asset_groups:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.AssetGroup
+	20, // 19: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.stake_registration:type_name -> shiftcrypto.bitbox02.Keypath
+	20, // 20: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.stake_deregistration:type_name -> shiftcrypto.bitbox02.Keypath
+	17, // 21: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.stake_delegation:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.StakeDelegation
+	18, // 22: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.vote_delegation:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.VoteDelegation
+	1,  // 23: shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.VoteDelegation.type:type_name -> shiftcrypto.bitbox02.CardanoSignTransactionRequest.Certificate.VoteDelegation.CardanoDRepType
+	24, // [24:24] is the sub-list for method output_type
+	24, // [24:24] is the sub-list for method input_type
+	24, // [24:24] is the sub-list for extension type_name
+	24, // [24:24] is the sub-list for extension extendee
+	0,  // [0:24] is the sub-list for field type_name
 }
 
 func init() { file_cardano_proto_init() }
@@ -1688,6 +1863,18 @@ func file_cardano_proto_init() {
 			}
 		}
 		file_cardano_proto_msgTypes[16].Exporter = func(v any, i int) any {
+			switch v := v.(*CardanoSignTransactionRequest_Certificate_VoteDelegation); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_cardano_proto_msgTypes[17].Exporter = func(v any, i int) any {
 			switch v := v.(*CardanoSignTransactionResponse_ShelleyWitness); i {
 			case 0:
 				return &v.state
@@ -1717,14 +1904,16 @@ func file_cardano_proto_init() {
 		(*CardanoSignTransactionRequest_Certificate_StakeRegistration)(nil),
 		(*CardanoSignTransactionRequest_Certificate_StakeDeregistration)(nil),
 		(*CardanoSignTransactionRequest_Certificate_StakeDelegation_)(nil),
+		(*CardanoSignTransactionRequest_Certificate_VoteDelegation_)(nil),
 	}
+	file_cardano_proto_msgTypes[16].OneofWrappers = []any{}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_cardano_proto_rawDesc,
-			NumEnums:      1,
-			NumMessages:   17,
+			NumEnums:      2,
+			NumMessages:   18,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/api/firmware/messages/cardano.proto b/api/firmware/messages/cardano.proto
index ba4bca5..54b661d 100644
--- a/api/firmware/messages/cardano.proto
+++ b/api/firmware/messages/cardano.proto
@@ -85,16 +85,30 @@ message CardanoSignTransactionRequest {
     repeated AssetGroup asset_groups = 4;
   }
 
-  // See https://github.com/input-output-hk/cardano-ledger-specs/blob/d0aa86ded0b973b09b629e5aa62aa1e71364d088/eras/alonzo/test-suite/cddl-files/alonzo.cddl#L150
+  // See https://github.com/IntersectMBO/cardano-ledger/blob/cardano-ledger-conway-1.12.0.0/eras/conway/impl/cddl-files/conway.cddl#L273
   message Certificate {
     message StakeDelegation {
       repeated uint32 keypath = 1;
       bytes pool_keyhash = 2;
     }
+    message VoteDelegation {
+      enum CardanoDRepType {
+        KEY_HASH = 0;
+        SCRIPT_HASH = 1;
+        ALWAYS_ABSTAIN = 2;
+        ALWAYS_NO_CONFIDENCE = 3;
+      }
+
+      // keypath in this instance refers to stake credential
+      repeated uint32 keypath = 1;
+      CardanoDRepType type = 2;
+      optional bytes drep_credhash = 3;
+    }
     oneof cert {
       Keypath stake_registration = 1;
       Keypath stake_deregistration = 2;
       StakeDelegation stake_delegation = 3;
+      VoteDelegation vote_delegation = 10;
     }
   }
 
@@ -112,6 +126,9 @@ message CardanoSignTransactionRequest {
   repeated Withdrawal withdrawals = 7;
   uint64 validity_interval_start = 8;
   bool allow_zero_ttl = 9; // include ttl even if it is zero
+  // Tag arrays in the transaction serialization with the 258 tag.
+  // See https://github.com/IntersectMBO/cardano-ledger/blob/6e2d37cc0f47bd02e89b4ce9f78b59c35c958e96/eras/conway/impl/cddl-files/extra.cddl#L5
+  bool tag_cbor_sets = 10;
 }
 
 message CardanoSignTransactionResponse {
diff --git a/cmd/playground/main.go b/cmd/playground/main.go
index a8df56a..aae3dce 100644
--- a/cmd/playground/main.go
+++ b/cmd/playground/main.go
@@ -161,6 +161,7 @@ func signFromTxID(device *firmware.Device, txID string) {
 				Keypath:      []uint32{84 + HARDENED, 1 + HARDENED, 0 + HARDENED},
 			},
 		},
+		nil,
 		&firmware.BTCTx{
 			Version:  tx.Transaction.Version,
 			Inputs:   inputs,

From 86b43d236dbee0b374f807a17ec9b5baf144bb1d Mon Sep 17 00:00:00 2001
From: Marko Bencun <marko@shiftcrypto.ch>
Date: Thu, 13 Feb 2025 12:31:49 +0100
Subject: [PATCH 3/6] firmware: rename typo in test names

Marked the wrong one as the simulator test.
---
 api/firmware/btc_test.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/api/firmware/btc_test.go b/api/firmware/btc_test.go
index 70bc8f3..c124b55 100644
--- a/api/firmware/btc_test.go
+++ b/api/firmware/btc_test.go
@@ -82,7 +82,7 @@ func TestBTCXpub(t *testing.T) {
 	})
 }
 
-func TestBTCAddress(t *testing.T) {
+func TestSimulatorBTCAddress(t *testing.T) {
 	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
 		address, err := device.BTCAddress(
@@ -208,7 +208,7 @@ func TestSimulatorBTCXPub(t *testing.T) {
 	})
 }
 
-func TestSimulatorBTCAddress(t *testing.T) {
+func TestBTCAddress(t *testing.T) {
 	testConfigurations(t, func(t *testing.T, env *testEnv) {
 		t.Helper()
 		expected := "mocked-address"

From dc948bf05fd451a25eb25a628f489fa24d805cb4 Mon Sep 17 00:00:00 2001
From: Marko Bencun <marko@shiftcrypto.ch>
Date: Thu, 13 Feb 2025 12:37:15 +0100
Subject: [PATCH 4/6] api/firmware: add BTCAddress regtest simulator test

Previous commit pulled in the new firmware protobuf messages, so we
can add a test for it now.
---
 api/firmware/btc_test.go | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/api/firmware/btc_test.go b/api/firmware/btc_test.go
index c124b55..54e92ce 100644
--- a/api/firmware/btc_test.go
+++ b/api/firmware/btc_test.go
@@ -85,6 +85,7 @@ func TestBTCXpub(t *testing.T) {
 func TestSimulatorBTCAddress(t *testing.T) {
 	testInitializedSimulators(t, func(t *testing.T, device *Device, stdOut *bytes.Buffer) {
 		t.Helper()
+		// TBTC, P2WPKH
 		address, err := device.BTCAddress(
 			messages.BTCCoin_TBTC,
 			[]uint32{
@@ -99,6 +100,43 @@ func TestSimulatorBTCAddress(t *testing.T) {
 		)
 		require.NoError(t, err)
 		require.Equal(t, "tb1qq064dxjgl9h9wzgsmzy6t6306qew42w9ka02u3", address)
+
+		// BTC, P2WPKH
+		address, err = device.BTCAddress(
+			messages.BTCCoin_BTC,
+			[]uint32{
+				84 + hardenedKeyStart,
+				0 + hardenedKeyStart,
+				0 + hardenedKeyStart,
+				1,
+				10,
+			},
+			NewBTCScriptConfigSimple(messages.BTCScriptConfig_P2WPKH),
+			false,
+		)
+		require.NoError(t, err)
+		require.Equal(t, "bc1qcq0ceq9vs24g4tnkkx3k2rry9j44r74huc3d7s", address)
+
+		// RBTC, P2WPKH
+		address, err = device.BTCAddress(
+			messages.BTCCoin_RBTC,
+			[]uint32{
+				84 + hardenedKeyStart,
+				1 + hardenedKeyStart,
+				0 + hardenedKeyStart,
+				1,
+				10,
+			},
+			NewBTCScriptConfigSimple(messages.BTCScriptConfig_P2WPKH),
+			false,
+		)
+		// Regtest (RBTC) support added in v9.21.0
+		if device.Version().AtLeast(semver.NewSemVer(9, 21, 0)) {
+			require.NoError(t, err)
+			require.Equal(t, "bcrt1qq064dxjgl9h9wzgsmzy6t6306qew42w955k8tc", address)
+		} else {
+			require.Error(t, err)
+		}
 	})
 }
 

From 5e3567cc852618a32a48fc305d4390c1595268fe Mon Sep 17 00:00:00 2001
From: Marko Bencun <marko@shiftcrypto.ch>
Date: Tue, 18 Feb 2025 11:54:09 +0100
Subject: [PATCH 5/6] tests: add v9.22.0 simulator

---
 api/firmware/testdata/simulators.json | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/api/firmware/testdata/simulators.json b/api/firmware/testdata/simulators.json
index 8a9300d..ed22ef7 100644
--- a/api/firmware/testdata/simulators.json
+++ b/api/firmware/testdata/simulators.json
@@ -10,5 +10,9 @@
     {
         "url": "https://github.com/BitBoxSwiss/bitbox02-firmware/releases/download/firmware%2Fv9.21.0/bitbox02-multi-v9.21.0-simulator1.0.0-linux-amd64",
         "sha256": "72031b226ea344970a6a1506893838a63b075e0bad726557ab9d941b42c534f5"
+    },
+    {
+        "url": "https://github.com/BitBoxSwiss/bitbox02-firmware/releases/download/firmware%2Fv9.22.0/bitbox02-multi-v9.22.0-simulator1.0.0-linux-amd64",
+        "sha256": "3af12697f6fd51b155bf277ef01ef3eea5290908bff99a4aae83a95cb144ced1"
     }
 ]

From 57eb1c06989f56145b0003761bc075e9baf4c7c2 Mon Sep 17 00:00:00 2001
From: Marko Bencun <marko@shiftcrypto.ch>
Date: Tue, 18 Feb 2025 11:55:06 +0100
Subject: [PATCH 6/6] cardano: add min version check

---
 api/firmware/cardano.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/api/firmware/cardano.go b/api/firmware/cardano.go
index d8bd94f..865b742 100644
--- a/api/firmware/cardano.go
+++ b/api/firmware/cardano.go
@@ -17,6 +17,7 @@ package firmware
 import (
 	"github.com/BitBoxSwiss/bitbox02-api-go/api/firmware/messages"
 	"github.com/BitBoxSwiss/bitbox02-api-go/util/errp"
+	"github.com/BitBoxSwiss/bitbox02-api-go/util/semver"
 )
 
 // queryCardano is like query, but nested one level deeper for Cardano.
@@ -92,6 +93,12 @@ func (device *Device) CardanoAddress(
 func (device *Device) CardanoSignTransaction(
 	transaction *messages.CardanoSignTransactionRequest,
 ) (*messages.CardanoSignTransactionResponse, error) {
+	if transaction.TagCborSets {
+		if !device.version.AtLeast(semver.NewSemVer(9, 22, 0)) {
+			return nil, UnsupportedError("9.22.0")
+		}
+	}
+
 	request := &messages.CardanoRequest{
 		Request: &messages.CardanoRequest_SignTransaction{
 			SignTransaction: transaction,