syntax = "proto3";
package tendermint.crypto.merkle;

option go_package = "github.com/tendermint/tendermint/proto/tendermint/crypto/merkle";

import "gogoproto/gogo.proto";

message Proof {
  int64          total     = 1;
  int64          index     = 2;
  bytes          leaf_hash = 3;
  repeated bytes aunts     = 4;
}

message ValueOp {
  // Encoded in ProofOp.Key.
  bytes key = 1;

  // To encode in ProofOp.Data
  Proof proof = 2;
}

message DominoOp {
  string key    = 1;
  string input  = 2;
  string output = 3;
}

// ProofOp defines an operation used for calculating Merkle root
// The data could be arbitrary format, providing nessecary data
// for example neighbouring node hash
message ProofOp {
  string type = 1;
  bytes  key  = 2;
  bytes  data = 3;
}

// ProofOps is Merkle proof defined by the list of ProofOps
message ProofOps {
  repeated ProofOp ops = 1 [(gogoproto.nullable) = false];
}