added and generated protobufs

internal/exchange.proto

@@ -0,0 +1,58 @@
+/*
+ * Exchange communication
+ *
+ * @keepkey_version 2.0.0
+ */
+
+// Sugar for easier handling in Java
+option java_package = "com.keepkey.device-protocol";
+option java_outer_classname = "KeepKeyExchange";
+
+/**
+ * Structure representing address for various coin types (BTC, LTC, and etc).
+ * @used in ExchangeResponse
+ */
+message ExchangeAddress {
+    optional string coin_type = 1;
+    optional string address = 2;
+    optional string dest_tag = 3;
+    optional string rs_address = 4;
+}
+
+/**
+ * Structure representing exchange response version 2
+ */
+message ExchangeResponseV2 {
+    optional ExchangeAddress deposit_address = 1;
+    optional bytes deposit_amount = 2;
+    optional int64  expiration = 3;
+    optional bytes quoted_rate = 4;
+    optional ExchangeAddress withdrawal_address = 5;
+    optional bytes withdrawal_amount = 6;
+    optional ExchangeAddress return_address = 7;
+    optional bytes api_key = 8;
+    optional bytes miner_fee = 9;
+    optional bytes order_id = 10;
+}
+
+message SignedExchangeResponse {
+    optional ExchangeResponse response = 1; /* deprecated - latest firmware version throws error if this field is used */
+    optional bytes signature = 2;
+    optional ExchangeResponseV2 responseV2 = 3;
+}
+
+/**
+ * Structure representing exchange response version 1 (deprecated)
+ */
+message ExchangeResponse {
+    optional ExchangeAddress deposit_address = 1;
+    optional uint64 deposit_amount = 2;
+    optional int64  expiration = 3;
+    optional uint64 quoted_rate = 4;
+    optional ExchangeAddress withdrawal_address = 5;
+    optional uint64 withdrawal_amount = 6;
+    optional ExchangeAddress return_address = 7;
+    optional bytes api_key = 8;
+    optional uint64 miner_fee = 9;
+    optional bytes order_id = 10;
+}

internal/keepkey.go

@@ -0,0 +1,16 @@
+//go:generate protoc --go_out=import_path=keepkey:. types.proto exchange.proto messages.proto
+package keepkey
+
+import (
+	"reflect"
+
+	"github.com/golang/protobuf/proto"
+)
+
+func Type(msg proto.Message) uint16 {
+	return uint16(MessageType_value["MessageType_"+reflect.TypeOf(msg).Elem().Name()])
+}
+
+func Name(kind uint16) string {
+	return MessageType_name[int32(kind)]
+}