syntax = "proto3";

package signer;

service Signer {
  // This API accepts rows of encoded blobs to sign from clients. The node will verify the blobs existance in `DAEntrance` contract and validate the received rows.
  rpc BatchSign(BatchSignRequest) returns (BatchSignReply) {}
  // This retrieves the requested encoded rows from the DA node database.
  rpc BatchRetrieve(BatchRetrieveRequest) returns (BatchRetrieveReply) {}
  rpc GetStatus(Empty) returns (StatusReply) {}
}

message SignRequest {
  // epoch number of DASigners internal contract
  uint64 epoch = 1;
  // quorum id of DASigners internal contract
  uint64 quorum_id = 2; 
  // erasure commitment generated by encoder
  bytes erasure_commitment = 3;
  // merkle root of data
  bytes storage_root = 4; 
  // encoded slices of data
  repeated bytes encoded_slice = 5;
}

message BatchSignRequest {
  repeated SignRequest requests = 1;
}

message BatchSignReply {
  // signatures for requests
  repeated bytes signatures = 1;
}

message RetrieveRequest {
  // epoch number of DASigners internal contract
  uint64 epoch = 1;
  // quorum id of DASigners internal contract
  uint64 quorum_id = 2;
  // merkle root of data
  bytes storage_root = 3; 
  // required row indexes
  repeated uint32 row_indexes = 4;
}

message BatchRetrieveRequest {
  repeated RetrieveRequest requests = 1;
}

message Slices {
  repeated bytes encoded_slice = 1;
}

message BatchRetrieveReply {
  // required encoded slices
  repeated Slices encoded_slice = 1;
}

message StatusReply {
  uint64 status_code = 1;
  string entrance_contract = 2;
}

message Empty {}