syntax = "proto3";

option java_multiple_files = true;
option java_package = "io.grpc.lspd.service";
option java_outer_classname = "LspdProto";

package lspd;

service ChannelOpener {
  rpc ChannelInformation(ChannelInformationRequest)
      returns (ChannelInformationReply) {}
  rpc OpenChannel(OpenChannelRequest) returns (OpenChannelReply) {}
}

message ChannelInformationRequest {
  /// The identity pubkey of the Lightning node
  string pubkey = 1 [ json_name = "pubkey" ];
}

message ChannelInformationReply {
  /// The name of of lsp
  string name = 1 [ json_name = "name" ];

  /// The identity pubkey of the Lightning node
  string pubkey = 2 [ json_name = "pubkey" ];
  /// The network location of the lightning node, e.g. `12.34.56.78:9012` or
  /// `localhost:10011`
  string host = 3 [ json_name = "host" ];

  /// The channel capacity in satoshis
  int64 channel_capacity = 4 [ json_name = "channel_capacity" ];
  /// The target number of blocks that the funding transaction should be
  /// confirmed by.
  int32 target_conf = 5 [ json_name = "target_conf" ];

  /// The base fee charged regardless of the number of milli-satoshis sent.
  int64 base_fee_msat = 6 [ json_name = "base_fee_msat" ];
  /// The effective fee rate in milli-satoshis. The precision of this value goes
  /// up to 6 decimal places, so 1e-6.
  double fee_rate = 7 [ json_name = "fee_rate" ];
  /// The required timelock delta for HTLCs forwarded over the channel.
  uint32 time_lock_delta = 8 [ json_name = "time_lock_delta" ];
  /// The minimum value in millisatoshi we will require for incoming HTLCs on
  /// the channel.
  int64 min_htlc_msat = 9 [ json_name = "min_htlc_msat" ];
}

message OpenChannelRequest {
  /// The identity pubkey of the Lightning node
  string pubkey = 1 [ json_name = "pubkey" ];
}

message OpenChannelReply {
  /// The transaction hash
  string tx_hash = 1 [ json_name = "tx_hash" ];
  /// The output index
  uint32 output_index = 2 [ json_name = "output_index"];
}