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70 lines
3.0 KiB
70 lines
3.0 KiB
// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// This file contains the implementation for interacting with the Trezor hardware
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// wallets. The wire protocol spec can be found on the SatoshiLabs website:
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// https://docs.trezor.io/trezor-firmware/common/message-workflows.html
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// !!! STAHP !!!
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//
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// Before you touch the protocol files, you need to be aware of a breaking change
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// that occurred between firmware versions 1.7.3->1.8.0 (Model One) and 2.0.10->
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// 2.1.0 (Model T). The Ethereum address representation was changed from the 20
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// byte binary blob to a 42 byte hex string. The upstream protocol buffer files
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// only support the new format, so blindly pulling in a new spec will break old
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// devices!
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//
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// The Trezor devs had the foresight to add the string version as a new message
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// code instead of replacing the binary one. This means that the proto file can
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// actually define both the old and the new versions as optional. Please ensure
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// that you add back the old addresses everywhere (to avoid name clash. use the
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// addressBin and addressHex names).
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//
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// If in doubt, reach out to @karalabe.
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// To regenerate the protocol files in this package:
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// - Download the latest protoc https://github.com/protocolbuffers/protobuf/releases
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// - Build with the usual `./configure && make` and ensure it's on your $PATH
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// - Delete all the .proto and .pb.go files, pull in fresh ones from Trezor
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// - Grab the latest Go plugin `go get -u google.golang.org/protobuf/cmd/protoc-gen-go`
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// - Vendor in the latest Go plugin `govendor fetch google.golang.org/protobuf/...`
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//go:generate protoc -I/usr/local/include:. --go_out=paths=source_relative:. messages.proto messages-common.proto messages-management.proto messages-ethereum.proto
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// Package trezor contains the wire protocol.
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package trezor
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import (
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"reflect"
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"google.golang.org/protobuf/proto"
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)
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// Type returns the protocol buffer type number of a specific message. If the
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// message is nil, this method panics!
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func Type(msg proto.Message) uint16 {
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return uint16(MessageType_value["MessageType_"+reflect.TypeOf(msg).Elem().Name()])
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}
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// Name returns the friendly message type name of a specific protocol buffer
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// type number.
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func Name(kind uint16) string {
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name := MessageType_name[int32(kind)]
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if len(name) < 12 {
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return name
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}
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return name[12:]
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}
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