// iOS - since we use a modern proto-compiler, we must specify
// the legacy proto format.
syntax = "proto2";

// iOS - package name determines class prefix
package SPKProtos;

message TSProtoWhisperMessage {
  // @required
  optional bytes  ratchetKey      = 1;
  // @required
  optional uint32 counter         = 2;
  optional uint32 previousCounter = 3;
  // @required
  optional bytes  ciphertext      = 4;
}

message TSProtoPreKeyWhisperMessage {
  optional uint32 registrationId = 5;
  optional uint32 preKeyId       = 1;
  // @required
  optional uint32 signedPreKeyId = 6;
  // @required
  optional bytes  baseKey        = 2;
  // @required
  optional bytes  identityKey    = 3;
  // @required
  optional bytes  message        = 4; // WhisperMessage
}

message TSProtoKeyExchangeMessage {
  optional uint32 id               = 1;
  optional bytes  baseKey          = 2;
  optional bytes  ratchetKey       = 3;
  optional bytes  identityKey      = 4;
  optional bytes  baseKeySignature = 5;
}

message TSProtoSenderKeyMessage {
  optional uint32 id         = 1;
  optional uint32 iteration  = 2;
  optional bytes  ciphertext = 3;
}

message TSProtoSenderKeyDistributionMessage {
  optional uint32 id         = 1;
  optional uint32 iteration  = 2;
  optional bytes  chainKey   = 3;
  optional bytes  signingKey = 4;
}

message ClosedGroupCiphertextMessage {
  // @required
  optional bytes  ciphertext      = 1;
  // @required
  optional bytes  senderPublicKey = 2;
  // @required
  optional uint32 keyIndex        = 3;
}