syntax = "proto3";

import "google/protobuf/empty.proto";
import "types/types.proto";

package remote;

option go_package = "./remote;remote";

service ETHBACKEND {
  rpc Etherbase(EtherbaseRequest) returns (EtherbaseReply);

  rpc NetVersion(NetVersionRequest) returns (NetVersionReply);

  // Version returns the service version number
  rpc Version(google.protobuf.Empty) returns (types.VersionReply);

  // ProtocolVersion returns the Ethereum protocol version number (e.g. 66 for ETH66).
  rpc ProtocolVersion(ProtocolVersionRequest) returns (ProtocolVersionReply);

  // ClientVersion returns the Ethereum client version string using node name convention (e.g. Erigon/v2021.03.2-alpha/Linux).
  rpc ClientVersion(ClientVersionRequest) returns (ClientVersionReply);

  rpc Subscribe(SubscribeRequest) returns (stream SubscribeReply);
}

enum Event {
  HEADER = 0;
  PENDING_LOGS = 1;
  PENDING_BLOCK = 2;
}

message EtherbaseRequest {}

message EtherbaseReply { types.H160 address = 1; }

message NetVersionRequest {}

message NetVersionReply { uint64 id = 1; }

message ProtocolVersionRequest {}

message ProtocolVersionReply { uint64 id = 1; }

message ClientVersionRequest {}

message ClientVersionReply { string nodeName = 1; }

message SubscribeRequest {
  Event type = 1;
}

message SubscribeReply {
  Event type = 1;
  bytes data = 2;  //  serialized data
}