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;
  DRAND = 2;
  CLIENT_SUPPORT = 3;
}

// MessageType indicates what is the type of this message.
enum MessageType {
  NEWNODE_BEACON_STAKING = 0;
  ANNOUNCE = 1;
  PREPARE = 2;
  PREPARED = 3;
  COMMIT = 4;
  COMMITTED = 5;
  VIEWCHANGE = 6;
  NEWVIEW = 7;
  DRAND_INIT = 10;
  DRAND_COMMIT = 11; 
  LOTTERY_REQUEST = 12; // 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;
      ConsensusRequest consensus = 5;
      DrandRequest drand = 6;
      ViewChangeRequest viewchange = 7;
      // Refactor this later after demo.
      LotteryRequest lottery_request = 8;
  }
}

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

message LotteryResponse {
  repeated string players = 2;
  repeated string balances = 3;
}

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

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

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

message DrandRequest {
  bytes sender_pubkey = 1;
  bytes block_hash = 2;
  bytes payload = 3;
}

message ViewChangeRequest {
    uint32 view_id = 1;
    uint64 block_num = 2;
    bytes sender_pubkey = 3;
    bytes leader_pubkey = 4;
    bytes payload = 5; // message payload: either m1 type or m2 type 
    bytes viewchange_sig = 6; // signature on payload
                        
    // below is for newview message only
    bytes m1_aggsigs = 7; // m1: |block_hash|bhp_sigs|bhp_bitmap|
    bytes m1_bitmap = 8;
    bytes m2_aggsigs = 9; // m2: |nil|
    bytes m2_bitmap = 10;
}