syntax = "proto3";

import "types/types.proto";

package remote;

option go_package = "./remote;remote";

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

  rpc NetVersion(NetVersionRequest) returns (NetVersionReply);

  // 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. TurboGeth/v2021.03.2-alpha/Linux).
  rpc ClientVersion(ClientVersionRequest) returns (ClientVersionReply);

  rpc Subscribe(SubscribeRequest) returns (stream SubscribeReply);

  // GetWork returns a work package for external miner.
  //
  // The work package consists of 3 strings:
  //   result[0] - 32 bytes hex encoded current block header pow-hash
  //   result[1] - 32 bytes hex encoded seed hash used for DAG
  //   result[2] - 32 bytes hex encoded boundary condition ("target"), 2^256/difficulty
  //   result[3] - hex encoded block number
  rpc GetWork(GetWorkRequest) returns (GetWorkReply);

  // SubmitWork can be used by external miner to submit their POW solution.
  // It returns an indication if the work was accepted.
  // Note either an invalid solution, a stale work a non-existent work will return false.
  rpc SubmitWork(SubmitWorkRequest) returns (SubmitWorkReply);

  // SubmitHashRate can be used for remote miners to submit their hash rate.
  // This enables the node to report the combined hash rate of all miners
  // which submit work through this node.
  //
  // It accepts the miner hash rate and an identifier which must be unique
  // between nodes.
  rpc SubmitHashRate(SubmitHashRateRequest) returns (SubmitHashRateReply);

  // GetHashRate returns the current hashrate for local CPU miner and remote miner.
  rpc GetHashRate(GetHashRateRequest) returns (GetHashRateReply);

  // Mining returns an indication if this node is currently mining and it's mining configuration
  rpc Mining(MiningRequest) returns (MiningReply);
}

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
}

message GetWorkRequest {}

message GetWorkReply {
  string headerHash = 1; // 32 bytes hex encoded current block header pow-hash
  string seedHash = 2; // 32 bytes hex encoded seed hash used for DAG
  string target = 3;  // 32 bytes hex encoded boundary condition ("target"), 2^256/difficulty
  string blockNumber = 4; // hex encoded block number
}

message SubmitWorkRequest {
  bytes blockNonce = 1;
  bytes powHash   = 2;
  bytes digest = 3;
}

message SubmitWorkReply {
  bool ok = 1;
}

message SubmitHashRateRequest {
  uint64 rate = 1;
  bytes id = 2;
}
message SubmitHashRateReply {
  bool ok = 1;
}

message GetHashRateRequest {}
message GetHashRateReply {
  uint64 hashRate = 1;
}

message MiningRequest {}
message MiningReply {
  bool enabled = 1;
  bool running = 2;
}