debts.hpp

См. документацию.

#pragma once
 
#include <eosio/eosio.hpp>
#include <eosio/asset.hpp>
 
using namespace eosio;
using std::string;
 
namespace Capital::Debts {
 
namespace Status {
  constexpr name CREATED = "created"_n;      
  constexpr name APPROVED = "approved"_n;    
  constexpr name AUTHORIZED = "authorized"_n; 
  constexpr name PAID = "paid"_n;            
}
 
struct [[eosio::table, eosio::contract(CAPITAL)]] debt {
  uint64_t         id;                        
  eosio::name      coopname;                  
  eosio::name      username;                  
  eosio::name      status = Status::CREATED;  
  checksum256      debt_hash;                 
  checksum256      project_hash;              
  time_point_sec   repaid_at;                 
  asset            amount;                    
  document2        statement;                 
  document2        approved_statement;        
  document2        authorization;             
  std::string      memo;                      
  
  uint64_t primary_key() const { return id; } 
 
  uint64_t by_username() const { return username.value; } 
  checksum256 by_debt_hash() const { return debt_hash; } 
  checksum256 by_project_hash() const { return project_hash; } 
};
 
typedef eosio::multi_index<
  "debts"_n,
  debt,
  indexed_by<"byusername"_n, const_mem_fun<debt, uint64_t, &debt::by_username>>,
  indexed_by<"bydebthash"_n, const_mem_fun<debt, checksum256, &debt::by_debt_hash>>,
  indexed_by<"byprojhash"_n, const_mem_fun<debt, checksum256, &debt::by_project_hash>>
> debts_index;
 
inline std::optional<debt> get_debt(eosio::name coopname, const checksum256 &debt_hash) {
  debts_index debts(_capital, coopname.value);
  auto hash_index = debts.get_index<"bydebthash"_n>();
 
  auto itr = hash_index.find(debt_hash);
  if (itr == hash_index.end()) {
      return std::nullopt;
  }
 
  return *itr;
}
 
inline debt get_debt_or_fail(eosio::name coopname, const checksum256 &debt_hash, const char* msg = "Долг не найден") {
  auto maybe_debt = get_debt(coopname, debt_hash);
  eosio::check(maybe_debt.has_value(), msg);
  return *maybe_debt;
}
 
inline void create_debt(
  eosio::name coopname,
  eosio::name username, 
  const checksum256 &project_hash,
  const checksum256 &debt_hash,
  const asset &amount,
  const time_point_sec &repaid_at,
  const document2 &statement,
  eosio::name payer = name{}
) {
  if (payer == name{}) payer = coopname;
  
  // Проверяем что долга с таким хэшем еще нет
  auto exist_debt = get_debt(coopname, debt_hash);
  eosio::check(!exist_debt.has_value(), "Ссуда с указанным hash уже существует");
  
  debts_index debts(_capital, coopname.value);
  auto debt_id = get_global_id_in_scope(_capital, coopname, "debts"_n);
  
  debts.emplace(payer, [&](auto &d){
    d.id = debt_id;
    d.coopname = coopname;
    d.username = username;
    d.status = Status::CREATED;
    d.debt_hash = debt_hash;
    d.project_hash = project_hash;
    d.amount = amount;
    d.statement = statement;
    d.repaid_at = repaid_at;
  });
}
 
inline void update_debt_status(
  eosio::name coopname,
  const checksum256 &debt_hash,
  eosio::name new_status,
  eosio::name payer = name{},
  const document2 &document = document2{},
  const std::string &memo = ""
) {
  if (payer == name{}) payer = coopname;
  
  auto exist_debt = get_debt_or_fail(coopname, debt_hash);
  
  debts_index debts(_capital, coopname.value);
  auto debt = debts.find(exist_debt.id);
  
  debts.modify(debt, payer, [&](auto &d) {
    d.status = new_status;
    
    if (new_status == Status::APPROVED) {
      d.approved_statement = document;
    } else if (new_status == Status::AUTHORIZED) {
      d.authorization = document;
    }
    
    if (!memo.empty()) {
      d.memo = memo;
    }
  });
}
 
inline void delete_debt(eosio::name coopname, const checksum256 &debt_hash) {
  auto exist_debt = get_debt_or_fail(coopname, debt_hash);
  
  debts_index debts(_capital, coopname.value);
  auto debt = debts.find(exist_debt.id);
  
  debts.erase(debt);
}
 
inline void create_debt_approval(
  eosio::name coopname,
  eosio::name username,
  const checksum256 &debt_hash,
  const document2 &statement
) {
  ::Soviet::create_approval(
    _capital,
    coopname,
    username,
    statement,
    Names::Capital::CREATE_DEBT,
    debt_hash,
    _capital,
    "approvedebt"_n,
    "declinedebt"_n,
    std::string("")
  );
}
 
inline void create_debt_agenda(
  eosio::name coopname,
  eosio::name username,
  const checksum256 &debt_hash,
  const document2 &statement
) {
  ::Soviet::create_agenda(
    _capital,
    coopname,
    username, 
    Names::SovietActions::CREATE_DEBT,
    debt_hash, 
    _capital, 
    Names::Capital::AUTHORIZE_DEBT, 
    Names::Capital::DECLINE_DEBT, 
    statement, 
    std::string("")
  );
}
 
 
 
 
} // namespace Capital::Debts