diff --git a/vendor/github.com/trezor/trezord-go/memorywriter/memorywriter.go b/vendor/github.com/trezor/trezord-go/memorywriter/memorywriter.go
new file mode 100644
index 0000000000..adf8f5b505
--- /dev/null
+++ b/vendor/github.com/trezor/trezord-go/memorywriter/memorywriter.go
@@ -0,0 +1,194 @@
+package memorywriter
+
+import (
+	"bytes"
+	"compress/gzip"
+	"errors"
+	"fmt"
+	"io"
+	"runtime"
+	"strings"
+	"sync"
+	"time"
+)
+
+// This is a helper package that writes logs to memory,
+// rotates the lines, but remembers some lines on the start
+// It is useful for detailed logging, that would take too much memory
+
+// to prevent possible memory issues, hardcode max line length
+const maxLineLength = 500
+
+type MemoryWriter struct {
+	maxLineCount int
+	lines        [][]byte // lines include newlines
+	startCount   int
+	startLines   [][]byte
+	startTime    time.Time
+	printTime    bool
+	mutex        sync.Mutex
+
+	outWriter io.Writer
+}
+
+func findInternalPrefix() string {
+	pc := make([]uintptr, 15)
+	n := runtime.Callers(1, pc)
+	frames := runtime.CallersFrames(pc[:n])
+	frame, _ := frames.Next()
+	file := frame.File
+	return strings.TrimSuffix(file, "memorywriter/memorywriter.go")
+}
+
+var internalPrefix = findInternalPrefix()
+
+func (m *MemoryWriter) Log(s string) {
+	pc := make([]uintptr, 15)
+	n := runtime.Callers(2, pc)
+	frames := runtime.CallersFrames(pc[:n])
+	frame, _ := frames.Next()
+	file := frame.File
+	file = strings.TrimPrefix(file, internalPrefix)
+	function := frame.Function
+	function = strings.TrimPrefix(function, "github.com/trezor/trezord-go/")
+	r := fmt.Sprintf("[%s %d %s]", file, frame.Line, function)
+	m.println(r + " " + s)
+
+}
+
+func (m *MemoryWriter) println(s string) {
+	long := []byte(s + "\n")
+	_, err := m.Write(long)
+	if err != nil {
+		// give up, just print on stdout
+		fmt.Println(err)
+	}
+}
+
+// Writer remembers lines in memory
+func (m *MemoryWriter) Write(p []byte) (int, error) {
+	m.mutex.Lock()
+	defer func() {
+		m.mutex.Unlock()
+	}()
+	if len(p) > maxLineLength {
+		return 0, errors.New("input too long")
+	}
+
+	var newline []byte
+	if !m.printTime {
+		newline = make([]byte, len(p))
+		copy(newline, p)
+	} else {
+		now := time.Now()
+		elapsed := now.Sub(m.startTime)
+
+		elapsedS := fmt.Sprintf("%.6f", elapsed.Seconds())
+		nowS := now.Format("15:04:05")
+
+		newline = []byte(fmt.Sprintf("[%s : %s] %s", elapsedS, nowS, string(p)))
+	}
+
+	if len(m.startLines) < m.startCount {
+		// do not rotate
+		m.startLines = append(m.startLines, newline)
+	} else {
+		// rotate
+		for len(m.lines) >= m.maxLineCount {
+			m.lines = m.lines[1:]
+		}
+
+		m.lines = append(m.lines, newline)
+	}
+	if m.outWriter != nil {
+		_, wrErr := m.outWriter.Write(newline)
+		if wrErr != nil {
+			// give up, just print on stdout
+			fmt.Println(wrErr)
+		}
+	}
+	return len(p), nil
+}
+
+// Exports lines to a writer, plus adds additional text on top
+// In our case, additional text is devcon exports and trezord version
+func (m *MemoryWriter) writeTo(start string, w io.Writer) error {
+	m.mutex.Lock()
+	defer func() {
+		m.mutex.Unlock()
+	}()
+	_, err := w.Write([]byte(start))
+	if err != nil {
+		return err
+	}
+
+	// Write end lines (latest on up)
+	for i := len(m.lines) - 1; i >= 0; i-- {
+		line := m.lines[i]
+		_, err = w.Write(line)
+		if err != nil {
+			return err
+		}
+	}
+
+	// ... to make space between start and end
+	_, err = w.Write([]byte("...\n"))
+	if err != nil {
+		return err
+	}
+
+	// Write start lines
+	for i := len(m.startLines) - 1; i >= 0; i-- {
+		line := m.startLines[i]
+		_, err = w.Write(line)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// String exports as string
+func (m *MemoryWriter) String(start string) (string, error) {
+	var b bytes.Buffer
+	err := m.writeTo(start, &b)
+	if err != nil {
+		return "", err
+	}
+	return b.String(), nil
+}
+
+// Gzip exports as GZip bytes
+func (m *MemoryWriter) Gzip(start string) ([]byte, error) {
+	var buf bytes.Buffer
+	gw, err := gzip.NewWriterLevel(&buf, gzip.BestCompression)
+	if err != nil {
+		return nil, err
+	}
+
+	gw.Name = "log.txt"
+	err = m.writeTo(start, gw)
+	if err != nil {
+		return nil, err
+	}
+
+	err = gw.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+func New(size int, startSize int, printTime bool, out io.Writer) *MemoryWriter {
+	return &MemoryWriter{
+		maxLineCount: size,
+		lines:        make([][]byte, 0, size),
+		startCount:   startSize,
+		startLines:   make([][]byte, 0, startSize),
+		startTime:    time.Now(),
+		printTime:    printTime,
+		outWriter:    out,
+	}
+}
diff --git a/vendor/github.com/trezor/trezord-go/usb/lowlevel/hidapi/README.md b/vendor/github.com/trezor/trezord-go/usb/lowlevel/hidapi/README.md
new file mode 100644
index 0000000000..1990d8e924
--- /dev/null
+++ b/vendor/github.com/trezor/trezord-go/usb/lowlevel/hidapi/README.md
@@ -0,0 +1,14 @@
+# hidapi go wrapper
+
+This is a go wrapper around hidapi.
+
+The code is mostly copied from https://github.com/karalabe/hid
+
+ALSO NOTE - there is a hardcoded device filter because of random windows errors.
+
+## License
+
+Code is under GNU LGPL 2.1.
+
+* (C) Karel Bilek 2017
+* (C) 2017 Péter Szilágyi (also see https://github.com/karalabe/hid for comprehensive list)
diff --git a/vendor/github.com/trezor/trezord-go/usb/lowlevel/hidapi/hid.go b/vendor/github.com/trezor/trezord-go/usb/lowlevel/hidapi/hid.go
new file mode 100644
index 0000000000..3529dd7a0d
--- /dev/null
+++ b/vendor/github.com/trezor/trezord-go/usb/lowlevel/hidapi/hid.go
@@ -0,0 +1,238 @@
+// hid - Gopher Interface Devices (USB HID)
+// Copyright (c) 2017 Péter Szilágyi. All rights reserved.
+//
+// This file is released under the 3-clause BSD license. Note however that Linux
+// support depends on libusb, released under GNU LGPL 2.1 or later.
+
+// Package hid provides an interface for USB HID devices.
+
+// +build darwin,!ios,cgo windows,cgo
+
+package hidapi
+
+/*
+extern void goHidLog(const char *s);
+
+#cgo CFLAGS: -I./c
+
+#cgo darwin CFLAGS: -DOS_DARWIN
+#cgo darwin LDFLAGS: -framework CoreFoundation -framework IOKit
+#cgo windows CFLAGS: -DOS_WINDOWS
+#cgo windows LDFLAGS: -lsetupapi
+
+#ifdef OS_DARWIN
+	#include "mac/hid.c"
+#elif OS_WINDOWS
+	#define HARDCODED_HIDAPI_DEVICE_FILTER "vid_534c"
+	#include "windows/hid.c"
+#endif
+
+*/
+import "C"
+
+import (
+	"errors"
+	"runtime"
+	"sync"
+	"unsafe"
+)
+
+// ErrDeviceClosed is returned for operations where the device closed before or
+// during the execution.
+var ErrDeviceClosed = errors.New("hid: device closed")
+
+// ErrUnsupportedPlatform is returned for all operations where the underlying
+// operating system is not supported by the library.
+var ErrUnsupportedPlatform = errors.New("hid: unsupported platform")
+
+// HidDeviceInfo is a hidapi info structure.
+type HidDeviceInfo struct {
+	Path         string // Platform-specific device path
+	VendorID     uint16 // Device Vendor ID
+	ProductID    uint16 // Device Product ID
+	Release      uint16 // Device Release Number in binary-coded decimal, also known as Device Version Number
+	Serial       string // Serial Number
+	Manufacturer string // Manufacturer String
+	Product      string // Product string
+	UsagePage    uint16 // Usage Page for this Device/Interface (Windows/Mac only)
+	Usage        uint16 // Usage for this Device/Interface (Windows/Mac only)
+
+	// The USB interface which this logical device
+	// represents. Valid on both Linux implementations
+	// in all cases, and valid on the Windows implementation
+	// only if the device contains more than one interface.
+	Interface int
+}
+
+// enumerateLock is a mutex serializing access to USB device enumeration needed
+// by the macOS USB HID system calls, which require 2 consecutive method calls
+// for enumeration, causing crashes if called concurrently.
+//
+// For more details, see:
+//   https://developer.apple.com/documentation/iokit/1438371-iohidmanagersetdevicematching
+//   > "subsequent calls will cause the hid manager to release previously enumerated devices"
+var enumerateLock sync.Mutex
+
+func init() {
+	// Initialize the HIDAPI library
+	C.hid_init()
+}
+
+// Enumerate returns a list of all the HID devices attached to the system which
+// match the vendor and product id:
+//  - If the vendor id is set to 0 then any vendor matches.
+//  - If the product id is set to 0 then any product matches.
+//  - If the vendor and product id are both 0, all HID devices are returned.
+func HidEnumerate(vendorID uint16, productID uint16) []HidDeviceInfo {
+	enumerateLock.Lock()
+	defer enumerateLock.Unlock()
+
+	// Gather all device infos and ensure they are freed before returning
+	head := C.hid_enumerate(C.ushort(vendorID), C.ushort(productID))
+	if head == nil {
+		return nil
+	}
+	defer C.hid_free_enumeration(head)
+
+	// Iterate the list and retrieve the device details
+	var infos []HidDeviceInfo
+	for ; head != nil; head = head.next {
+		info := HidDeviceInfo{
+			Path:      C.GoString(head.path),
+			VendorID:  uint16(head.vendor_id),
+			ProductID: uint16(head.product_id),
+			Release:   uint16(head.release_number),
+			UsagePage: uint16(head.usage_page),
+			Usage:     uint16(head.usage),
+			Interface: int(head.interface_number),
+		}
+		if head.serial_number != nil {
+			info.Serial, _ = wcharTToString(head.serial_number)
+		}
+		if head.product_string != nil {
+			info.Product, _ = wcharTToString(head.product_string)
+		}
+		if head.manufacturer_string != nil {
+			info.Manufacturer, _ = wcharTToString(head.manufacturer_string)
+		}
+		infos = append(infos, info)
+	}
+	return infos
+}
+
+// Open connects to an HID device by its path name.
+func (info HidDeviceInfo) Open() (*HidDevice, error) {
+	path := C.CString(info.Path)
+	defer C.free(unsafe.Pointer(path))
+
+	device := C.hid_open_path(path)
+	if device == nil {
+		return nil, errors.New("hidapi: failed to open device")
+	}
+	return &HidDevice{
+		HidDeviceInfo: info,
+		device:        device,
+	}, nil
+}
+
+// Device is a live HID USB connected device handle.
+type HidDevice struct {
+	HidDeviceInfo // Embed the infos for easier access
+
+	device *C.hid_device // Low level HID device to communicate through
+	lock   sync.Mutex
+}
+
+// Close releases the HID USB device handle.
+func (dev *HidDevice) Close() error {
+	dev.lock.Lock()
+	defer dev.lock.Unlock()
+
+	if dev.device != nil {
+		C.hid_close(dev.device)
+		dev.device = nil
+	}
+	return nil
+}
+
+// Write sends an output report to a HID device.
+//
+// Write will send the data on the first OUT endpoint, if one exists. If it does
+// not, it will send the data through the Control Endpoint (Endpoint 0).
+func (dev *HidDevice) Write(b []byte, prepend bool) (int, error) {
+	// Abort if nothing to write
+	if len(b) == 0 {
+		return 0, nil
+	}
+	// Abort if device closed in between
+	dev.lock.Lock()
+	device := dev.device
+	dev.lock.Unlock()
+
+	if device == nil {
+		return 0, ErrDeviceClosed
+	}
+	// Prepend a HID report ID on Windows, other OSes don't need it
+	var report []byte
+	if prepend && runtime.GOOS == "windows" {
+		report = append([]byte{0x00}, b...)
+	} else {
+		report = b
+	}
+	// Execute the write operation
+	written := int(C.hid_write(device, (*C.uchar)(&report[0]), C.size_t(len(report))))
+	if written == -1 {
+		// If the write failed, verify if closed or other error
+		dev.lock.Lock()
+		device = dev.device
+		dev.lock.Unlock()
+
+		if device == nil {
+			return 0, ErrDeviceClosed
+		}
+		// Device not closed, some other error occurred
+		message := C.hid_error(device)
+		if message == nil {
+			return 0, errors.New("hidapi: unknown failure")
+		}
+		failure, _ := wcharTToString(message)
+		return 0, errors.New("hidapi: " + failure)
+	}
+	return written, nil
+}
+
+// Read retrieves an input report from a HID device.
+func (dev *HidDevice) Read(b []byte, milliseconds int) (int, error) {
+	// Aborth if nothing to read
+	if len(b) == 0 {
+		return 0, nil
+	}
+	// Abort if device closed in between
+	dev.lock.Lock()
+	device := dev.device
+	dev.lock.Unlock()
+
+	if device == nil {
+		return 0, ErrDeviceClosed
+	}
+	// Execute the read operation
+	read := int(C.hid_read_timeout(device, (*C.uchar)(&b[0]), C.size_t(len(b)), C.int(milliseconds)))
+	if read == -1 {
+		// If the read failed, verify if closed or other error
+		dev.lock.Lock()
+		device = dev.device
+		dev.lock.Unlock()
+
+		if device == nil {
+			return 0, ErrDeviceClosed
+		}
+		// Device not closed, some other error occurred
+		message := C.hid_error(device)
+		if message == nil {
+			return 0, errors.New("hidapi: unknown failure")
+		}
+		failure, _ := wcharTToString(message)
+		return 0, errors.New("hidapi: " + failure)
+	}
+	return read, nil
+}
diff --git a/vendor/github.com/trezor/trezord-go/usb/lowlevel/hidapi/log.go b/vendor/github.com/trezor/trezord-go/usb/lowlevel/hidapi/log.go
new file mode 100644
index 0000000000..c6c8b55f54
--- /dev/null
+++ b/vendor/github.com/trezor/trezord-go/usb/lowlevel/hidapi/log.go
@@ -0,0 +1,20 @@
+package hidapi
+
+import (
+	"io"
+)
+
+import "C"
+
+var writer io.Writer
+
+func SetLogWriter(l io.Writer) {
+	writer = l
+}
+
+//export goHidLog
+func goHidLog(s *C.char) {
+	if writer != nil {
+		writer.Write([]byte(C.GoString(s)))
+	}
+}
diff --git a/vendor/github.com/trezor/trezord-go/usb/lowlevel/hidapi/wchar.go b/vendor/github.com/trezor/trezord-go/usb/lowlevel/hidapi/wchar.go
new file mode 100644
index 0000000000..2278c6b9e1
--- /dev/null
+++ b/vendor/github.com/trezor/trezord-go/usb/lowlevel/hidapi/wchar.go
@@ -0,0 +1,227 @@
+// This file is https://github.com/orofarne/gowchar/blob/master/gowchar.go
+//
+// It was vendored inline to work around CGO limitations that don't allow C types
+// to directly cross package API boundaries.
+//
+// The vendored file is licensed under the 3-clause BSD license, according to:
+// https://github.com/orofarne/gowchar/blob/master/LICENSE
+
+// +build !ios
+// +build linux freebsd darwin windows
+
+package hidapi
+
+/*
+#include <wchar.h>
+
+const size_t SIZEOF_WCHAR_T = sizeof(wchar_t);
+
+void gowchar_set (wchar_t *arr, int pos, wchar_t val)
+{
+	arr[pos] = val;
+}
+
+wchar_t gowchar_get (wchar_t *arr, int pos)
+{
+	return arr[pos];
+}
+*/
+import "C"
+
+import (
+	"fmt"
+	"unicode/utf16"
+	"unicode/utf8"
+)
+
+var sizeofWcharT C.size_t = C.size_t(C.SIZEOF_WCHAR_T)
+
+func stringToWcharT(s string) (*C.wchar_t, C.size_t) {
+	switch sizeofWcharT {
+	case 2:
+		return stringToWchar2(s) // Windows
+	case 4:
+		return stringToWchar4(s) // Unix
+	default:
+		panic(fmt.Sprintf("Invalid sizeof(wchar_t) = %v", sizeofWcharT))
+	}
+}
+
+func wcharTToString(s *C.wchar_t) (string, error) {
+	switch sizeofWcharT {
+	case 2:
+		return wchar2ToString(s) // Windows
+	case 4:
+		return wchar4ToString(s) // Unix
+	default:
+		panic(fmt.Sprintf("Invalid sizeof(wchar_t) = %v", sizeofWcharT))
+	}
+}
+
+func wcharTNToString(s *C.wchar_t, size C.size_t) (string, error) {
+	switch sizeofWcharT {
+	case 2:
+		return wchar2NToString(s, size) // Windows
+	case 4:
+		return wchar4NToString(s, size) // Unix
+	default:
+		panic(fmt.Sprintf("Invalid sizeof(wchar_t) = %v", sizeofWcharT))
+	}
+}
+
+// Windows
+func stringToWchar2(s string) (*C.wchar_t, C.size_t) {
+	var slen int
+	s1 := s
+	for len(s1) > 0 {
+		r, size := utf8.DecodeRuneInString(s1)
+		if er, _ := utf16.EncodeRune(r); er == '\uFFFD' {
+			slen += 1
+		} else {
+			slen += 2
+		}
+		s1 = s1[size:]
+	}
+	slen++ // \0
+	res := C.malloc(C.size_t(slen) * sizeofWcharT)
+	var i int
+	for len(s) > 0 {
+		r, size := utf8.DecodeRuneInString(s)
+		if r1, r2 := utf16.EncodeRune(r); r1 != '\uFFFD' {
+			C.gowchar_set((*C.wchar_t)(res), C.int(i), C.wchar_t(r1))
+			i++
+			C.gowchar_set((*C.wchar_t)(res), C.int(i), C.wchar_t(r2))
+			i++
+		} else {
+			C.gowchar_set((*C.wchar_t)(res), C.int(i), C.wchar_t(r))
+			i++
+		}
+		s = s[size:]
+	}
+	C.gowchar_set((*C.wchar_t)(res), C.int(slen-1), C.wchar_t(0)) // \0
+	return (*C.wchar_t)(res), C.size_t(slen)
+}
+
+// Unix
+func stringToWchar4(s string) (*C.wchar_t, C.size_t) {
+	slen := utf8.RuneCountInString(s)
+	slen++ // \0
+	res := C.malloc(C.size_t(slen) * sizeofWcharT)
+	var i int
+	for len(s) > 0 {
+		r, size := utf8.DecodeRuneInString(s)
+		C.gowchar_set((*C.wchar_t)(res), C.int(i), C.wchar_t(r))
+		s = s[size:]
+		i++
+	}
+	C.gowchar_set((*C.wchar_t)(res), C.int(slen-1), C.wchar_t(0)) // \0
+	return (*C.wchar_t)(res), C.size_t(slen)
+}
+
+// Windows
+func wchar2ToString(s *C.wchar_t) (string, error) {
+	var i int
+	var res string
+	for {
+		ch := C.gowchar_get(s, C.int(i))
+		if ch == 0 {
+			break
+		}
+		r := rune(ch)
+		i++
+		if !utf16.IsSurrogate(r) {
+			if !utf8.ValidRune(r) {
+				err := fmt.Errorf("Invalid rune at position %v", i)
+				return "", err
+			}
+			res += string(r)
+		} else {
+			ch2 := C.gowchar_get(s, C.int(i))
+			r2 := rune(ch2)
+			r12 := utf16.DecodeRune(r, r2)
+			if r12 == '\uFFFD' {
+				err := fmt.Errorf("Invalid surrogate pair at position %v", i-1)
+				return "", err
+			}
+			res += string(r12)
+			i++
+		}
+	}
+	return res, nil
+}
+
+// Unix
+func wchar4ToString(s *C.wchar_t) (string, error) {
+	var i int
+	var res string
+	for {
+		ch := C.gowchar_get(s, C.int(i))
+		if ch == 0 {
+			break
+		}
+		r := rune(ch)
+		if !utf8.ValidRune(r) {
+			err := fmt.Errorf("Invalid rune at position %v", i)
+			return "", err
+		}
+		res += string(r)
+		i++
+	}
+	return res, nil
+}
+
+// Windows
+func wchar2NToString(s *C.wchar_t, size C.size_t) (string, error) {
+	var i int
+	var res string
+	N := int(size)
+	for i < N {
+		ch := C.gowchar_get(s, C.int(i))
+		if ch == 0 {
+			break
+		}
+		r := rune(ch)
+		i++
+		if !utf16.IsSurrogate(r) {
+			if !utf8.ValidRune(r) {
+				err := fmt.Errorf("Invalid rune at position %v", i)
+				return "", err
+			}
+
+			res += string(r)
+		} else {
+			if i >= N {
+				err := fmt.Errorf("Invalid surrogate pair at position %v", i-1)
+				return "", err
+			}
+			ch2 := C.gowchar_get(s, C.int(i))
+			r2 := rune(ch2)
+			r12 := utf16.DecodeRune(r, r2)
+			if r12 == '\uFFFD' {
+				err := fmt.Errorf("Invalid surrogate pair at position %v", i-1)
+				return "", err
+			}
+			res += string(r12)
+			i++
+		}
+	}
+	return res, nil
+}
+
+// Unix
+func wchar4NToString(s *C.wchar_t, size C.size_t) (string, error) {
+	var i int
+	var res string
+	N := int(size)
+	for i < N {
+		ch := C.gowchar_get(s, C.int(i))
+		r := rune(ch)
+		if !utf8.ValidRune(r) {
+			err := fmt.Errorf("Invalid rune at position %v", i)
+			return "", err
+		}
+		res += string(r)
+		i++
+	}
+	return res, nil
+}