syntax = "proto3";

package common;

option go_package = "github.com/chirpstack/chirpstack/api/go/v4/common";
option java_package = "io.chirpstack.api";
option java_multiple_files = true;
option java_outer_classname = "CommonProto";
option csharp_namespace = "Chirpstack.Common";
option php_namespace = "Chirpstack\\Common";
option php_metadata_namespace = "GPBMetadata\\Chirpstack\\Common";

import "google/protobuf/timestamp.proto";

enum Modulation {
  // LoRa
  LORA = 0;

  // FSK
  FSK = 1;

  // LR-FHSS
  LR_FHSS = 2;
}

enum Region {
  // EU868
  EU868 = 0;

  // US915
  US915 = 2;

  // CN779
  CN779 = 3;

  // EU433
  EU433 = 4;

  // AU915
  AU915 = 5;

  // CN470
  CN470 = 6;

  // AS923
  AS923 = 7;

  // AS923 with -1.80 MHz frequency offset
  AS923_2 = 12;

  // AS923 with -6.60 MHz frequency offset
  AS923_3 = 13;

  // (AS923 with -5.90 MHz frequency offset).
  AS923_4 = 14;

  // KR920
  KR920 = 8;

  // IN865
  IN865 = 9;

  // RU864
  RU864 = 10;

  // ISM2400 (LoRaWAN 2.4 GHz)
  ISM2400 = 11;
}

enum MType {
  // JoinRequest.
  JOIN_REQUEST = 0;

  // JoinAccept.
  JOIN_ACCEPT = 1;

  // UnconfirmedDataUp.
  UNCONFIRMED_DATA_UP = 2;

  // UnconfirmedDataDown.
  UNCONFIRMED_DATA_DOWN = 3;

  // ConfirmedDataUp.
  CONFIRMED_DATA_UP = 4;

  // ConfirmedDataDown.
  CONFIRMED_DATA_DOWN = 5;

  // RejoinRequest.
  REJOIN_REQUEST = 6;

  // Proprietary.
  PROPRIETARY = 7;
}

enum MacVersion {
  LORAWAN_1_0_0 = 0;
  LORAWAN_1_0_1 = 1;
  LORAWAN_1_0_2 = 2;
  LORAWAN_1_0_3 = 3;
  LORAWAN_1_0_4 = 4;
  LORAWAN_1_1_0 = 5;
}

enum RegParamsRevision {
  A = 0;
  B = 1;
  RP002_1_0_0 = 2;
  RP002_1_0_1 = 3;
  RP002_1_0_2 = 4;
  RP002_1_0_3 = 5;
  RP002_1_0_4 = 6;
}

enum LocationSource {
  // Unknown.
  UNKNOWN = 0;

  // GPS.
  GPS = 1;

  // Manually configured.
  CONFIG = 2;

  // Geo resolver (TDOA).
  GEO_RESOLVER_TDOA = 3;

  // Geo resolver (RSSI).
  GEO_RESOLVER_RSSI = 4;

  // Geo resolver (GNSS).
  GEO_RESOLVER_GNSS = 5;

  // Geo resolver (WIFI).
  GEO_RESOLVER_WIFI = 6;
}

enum Aggregation {
  // Hour.
  HOUR = 0;

  // Day.
  DAY = 1;

  // Month.
  MONTH = 2;

  // Minute.
  MINUTE = 3;
}

enum MetricKind {
  // Incrementing counters that never decrease (these are not reset on each
  // reading).
  COUNTER = 0;

  // Counters that do get reset upon reading.
  ABSOLUTE = 1;

  // E.g. a temperature value.
  GAUGE = 2;
}

enum Regulation {
  // Unknown.
  REGULATION_UNKNOWN = 0;

  // ETSI EN 300 220.
  ETSI_EN_300_220 = 1;
}

message Location {
  // Latitude.
  double latitude = 1;

  // Longitude.
  double longitude = 2;

  // Altitude.
  double altitude = 3;

  // Location source.
  LocationSource source = 4;

  // Accuracy.
  float accuracy = 5;
}

message KeyEnvelope {
  // KEK label.
  string kek_label = 1;

  // AES key (when the kek_label is set, this value must first be decrypted).
  bytes aes_key = 2;
}

message Metric {
  // Name.
  string name = 1;

  // Timestamps.
  repeated google.protobuf.Timestamp timestamps = 2;

  // Datasets.
  repeated MetricDataset datasets = 3;

  // Kind.
  MetricKind kind = 4;
}

message MetricDataset {
  // Label.
  string label = 1;

  // Data.
  // Each value index corresponds with the same timestamp index of the Metric.
  repeated float data = 2;
}

enum DeviceClass {
  // Class-A.
  CLASS_A = 0;

  // Class-B.
  CLASS_B = 1;

  // Class-C.
  CLASS_C = 2;
}

// Join-Server context.
message JoinServerContext {
  // Session-key ID.
  string session_key_id = 1;

  // AppSKey envelope.
  KeyEnvelope app_s_key = 2;
}