text: #include "shadow_bitcoin_interface.h"
  
  #include <iostream>
  #include <unordered_set>
  
  std::unordered_set<std::string> t;
  
  void shadow_bitcoin_register_hash(const char hash[],int reindex) {
      t.insert(hash);
      return;
  }
  int shadow_bitcoin_check_hash(const char hash[]) {
      std::unordered_set<std::string>::const_iterator got = t.find(hash);
      int res = (got != t.end());
      return res;
  }
  
  void shadow_bitcoin_load_hash(){
    printf("start shadow_bitcoin_load_hash\n");
  }
  