syntax = "proto3";
package message;


// Client is the service used for any client-facing requests.
service ClientService {
  rpc Process(Message) returns (Response) {}
}

// ServiceType indicates which service used to generate this message.
enum ServiceType {
  CONSENSUS = 0;
  STAKING = 1 [deprecated=true];
  DRAND = 2 [deprecated=true];
  CLIENT_SUPPORT = 3;
}

// MessageType indicates what is the type of this message.
enum MessageType {
  NEWNODE_BEACON_STAKING = 0 [deprecated=true];
  ANNOUNCE = 1;
  PREPARE = 2;
  PREPARED = 3;
  COMMIT = 4;
  COMMITTED = 5;
  VIEWCHANGE = 6;
  NEWVIEW = 7;
  DRAND_INIT = 10 [deprecated=true];
  DRAND_COMMIT = 11 [deprecated=true];
  LOTTERY_REQUEST = 12 [deprecated=true]; // it should be either ENTER or GETPLAYERS but it will be removed later.
}

// This is universal message for all communication protocols.
// There are different Requests for different message types.
// As we introduce a new type of message just add a new MessageType and new type of request in Message.
//
// The request field will be either one of the structure corresponding to the MessageType type.
message Message {
  ServiceType service_type = 1;
  MessageType type = 2;
  bytes signature = 3;
  oneof request {
    StakingRequest staking = 4 [deprecated=true];
    ConsensusRequest consensus = 5 ;
    DrandRequest drand = 6 [deprecated=true];
    ViewChangeRequest viewchange = 7;
    // Refactor this later after demo.
    LotteryRequest lottery_request = 8 [deprecated=true];
  }
}

message Response {
  ServiceType service_type = 1;
  MessageType type = 2;
  oneof response {
    LotteryResponse lottery_response = 3 [deprecated=true];
  }
}

message LotteryResponse {
  repeated string players = 2 [deprecated=true];
  repeated string balances = 3 [deprecated=true];
}

message LotteryRequest {
  enum Type {
    ENTER = 0 [deprecated=true];
    RESULT = 1 [deprecated=true];
    PICK_WINNER = 2 [deprecated=true];
  }
  Type type = 1 [deprecated=true];
  string private_key = 2 [deprecated=true];
  int64 amount = 3 [deprecated=true];
}

// Staking Request from new node to beacon node.
message StakingRequest {
  bytes transaction = 1 [deprecated=true];
  string node_id = 2 [deprecated=true];
}

message ConsensusRequest {
  uint64 view_id = 1;
  uint64 block_num = 2;
  uint32 shard_id = 3;
  bytes block_hash = 4;
  bytes block = 5;
  bytes sender_pubkey = 6;
  bytes payload = 7;
}

message DrandRequest {
  uint32 shard_id = 1 [deprecated=true];
  bytes sender_pubkey = 2 [deprecated=true];
  bytes block_hash = 3 [deprecated=true];
  bytes payload = 4 [deprecated=true];
}

message ViewChangeRequest {
  uint64 view_id = 1;
  uint64 block_num = 2;
  uint32 shard_id = 3;
  bytes sender_pubkey = 4;
  bytes leader_pubkey = 5;
  bytes payload = 6; // message payload: either m1 type or m2 type
  bytes viewchange_sig = 7; // signature on payload
  bytes viewid_sig = 8; // signature on view_id

  // below is for newview message only
  // only need 1 valid m1 type message which is in payload
  bytes m2_aggsigs = 9; // m2: |nil|
  bytes m2_bitmap = 10;
  bytes m3_aggsigs = 11; // m3: |viewID|
  bytes m3_bitmap= 12;
  bytes prepared_block = 13;
}