shared_approver.hpp

См. документацию.

namespace Approver {
  struct [[eosio::table, eosio::contract(SOVIET)]] approval {
    uint64_t         id; 
    eosio::name      coopname; 
    eosio::name      username; 
    eosio::name      type; 
    document2         document; 
    checksum256      approval_hash; 
    eosio::name      callback_contract; 
    eosio::name      callback_action_approve; 
    eosio::name      callback_action_decline; 
    std::string      meta; 
    eosio::time_point_sec created_at; 
 
    uint64_t primary_key() const { return id; }
    checksum256 by_hash() const { return approval_hash; } 
    uint64_t by_username() const { return username.value; } 
    uint64_t by_type() const { return type.value; } 
  };
 
  typedef eosio::multi_index<
      "approvals"_n, approval,
      eosio::indexed_by<"byhash"_n, eosio::const_mem_fun<approval, checksum256, &approval::by_hash>>,
      eosio::indexed_by<"byusername"_n, eosio::const_mem_fun<approval, uint64_t, &approval::by_username>>,
      eosio::indexed_by<"bytype"_n, eosio::const_mem_fun<approval, uint64_t, &approval::by_type>>
  > approvals_index; 
  inline std::optional<approval> get_approval(eosio::name coopname, const checksum256 &hash) {
      approvals_index primary_index(_soviet, coopname.value);
      auto secondary_index = primary_index.get_index<"byhash"_n>();
 
      auto itr = secondary_index.find(hash);
      if (itr == secondary_index.end()) {
          return std::nullopt;
      }
 
      return *itr;
  }
  
}