Use std::unique_ptr instead of forward_list to hold ExchangePrivate memory

src/api/interface/include/exchange.hpp

@@ -1,7 +1,9 @@
 #pragma once
 
+#include <memory>
 #include <optional>
 #include <string_view>
+#include <type_traits>
 
 #include "cct_exception.hpp"
 #include "currencycode.hpp"
@@ -29,9 +31,10 @@ class Exchange {
   Exchange(const ExchangeConfig &exchangeConfig, ExchangePublic &exchangePublic);
 
   /// Build a Exchange with both private and public exchanges
-  Exchange(const ExchangeConfig &exchangeConfig, ExchangePublic &exchangePublic, ExchangePrivate &exchangePrivate);
+  Exchange(const ExchangeConfig &exchangeConfig, ExchangePublic &exchangePublic,
+           std::unique_ptr<ExchangePrivate> exchangePrivate);
 
-  std::string_view name() const { return _exchangePublic.name(); }
+  std::string_view name() const { return apiPublic().name(); }
   std::string_view keyName() const { return apiPrivate().keyName(); }
 
   ExchangeName createExchangeName() const {
@@ -41,63 +44,63 @@ class Exchange {
     return ExchangeName(name());
   }
 
-  ExchangePublic &apiPublic() { return _exchangePublic; }
-  const ExchangePublic &apiPublic() const { return _exchangePublic; }
+  ExchangePublic &apiPublic() { return *_pExchangePublic; }
+  const ExchangePublic &apiPublic() const { return *_pExchangePublic; }
 
   ExchangePrivate &apiPrivate() {
     if (hasPrivateAPI()) {
-      return *_pExchangePrivate;
+      return *_exchangePrivate;
     }
     throw exception("No private key associated to exchange {}", name());
   }
 
   const ExchangePrivate &apiPrivate() const {
     if (hasPrivateAPI()) {
-      return *_pExchangePrivate;
+      return *_exchangePrivate;
     }
     throw exception("No private key associated to exchange {}", name());
   }
 
-  const ExchangeConfig &exchangeConfig() const { return _exchangeConfig; }
+  const ExchangeConfig &exchangeConfig() const { return *_pExchangeConfig; }
 
-  bool hasPrivateAPI() const { return _pExchangePrivate != nullptr; }
+  bool hasPrivateAPI() const { return static_cast<bool>(_exchangePrivate); }
 
-  bool healthCheck() { return _exchangePublic.healthCheck(); }
+  bool healthCheck() { return apiPublic().healthCheck(); }
 
   CurrencyExchangeFlatSet queryTradableCurrencies() {
-    return hasPrivateAPI() ? _pExchangePrivate->queryTradableCurrencies() : _exchangePublic.queryTradableCurrencies();
+    return hasPrivateAPI() ? _exchangePrivate->queryTradableCurrencies() : apiPublic().queryTradableCurrencies();
   }
 
   CurrencyExchange convertStdCurrencyToCurrencyExchange(CurrencyCode currencyCode) {
-    return _exchangePublic.convertStdCurrencyToCurrencyExchange(currencyCode);
+    return apiPublic().convertStdCurrencyToCurrencyExchange(currencyCode);
   }
 
-  MarketSet queryTradableMarkets() { return _exchangePublic.queryTradableMarkets(); }
+  MarketSet queryTradableMarkets() { return apiPublic().queryTradableMarkets(); }
 
-  MarketPriceMap queryAllPrices() { return _exchangePublic.queryAllPrices(); }
+  MarketPriceMap queryAllPrices() { return apiPublic().queryAllPrices(); }
 
   MonetaryAmountByCurrencySet queryWithdrawalFees() {
-    return hasPrivateAPI() ? _pExchangePrivate->queryWithdrawalFees() : _exchangePublic.queryWithdrawalFees();
+    return hasPrivateAPI() ? _exchangePrivate->queryWithdrawalFees() : apiPublic().queryWithdrawalFees();
   }
 
   std::optional<MonetaryAmount> queryWithdrawalFee(CurrencyCode currencyCode) {
-    return hasPrivateAPI() ? _pExchangePrivate->queryWithdrawalFee(currencyCode)
-                           : _exchangePublic.queryWithdrawalFee(currencyCode);
+    return hasPrivateAPI() ? _exchangePrivate->queryWithdrawalFee(currencyCode)
+                           : apiPublic().queryWithdrawalFee(currencyCode);
   }
 
   MarketOrderBookMap queryAllApproximatedOrderBooks(int depth = ExchangePublic::kDefaultDepth) {
-    return _exchangePublic.queryAllApproximatedOrderBooks(depth);
+    return apiPublic().queryAllApproximatedOrderBooks(depth);
   }
 
   MarketOrderBook queryOrderBook(Market mk, int depth = ExchangePublic::kDefaultDepth);
 
-  MonetaryAmount queryLast24hVolume(Market mk) { return _exchangePublic.queryLast24hVolume(mk); }
+  MonetaryAmount queryLast24hVolume(Market mk) { return apiPublic().queryLast24hVolume(mk); }
 
   /// Retrieve an ordered vector of recent last trades
   PublicTradeVector queryLastTrades(Market mk, int nbTrades = ExchangePublic::kNbLastTradesDefault);
 
   /// Retrieve the last price of given market.
-  MonetaryAmount queryLastPrice(Market mk) { return _exchangePublic.queryLastPrice(mk); }
+  MonetaryAmount queryLastPrice(Market mk) { return apiPublic().queryLastPrice(mk); }
 
   bool canWithdraw(CurrencyCode currencyCode, const CurrencyExchangeFlatSet &currencyExchangeSet) const;
 
@@ -109,10 +112,13 @@ class Exchange {
 
   void updateCacheFile() const;
 
+  /// unique_ptr is always trivially relocatable whatever the underlying type.
+  using trivially_relocatable = std::true_type;
+
  private:
-  ExchangePublic &_exchangePublic;
-  ExchangePrivate *_pExchangePrivate = nullptr;
-  const ExchangeConfig &_exchangeConfig;
+  ExchangePublic *_pExchangePublic;
+  std::unique_ptr<ExchangePrivate> _exchangePrivate;
+  const ExchangeConfig *_pExchangeConfig;
 };
 
 }  // namespace cct

src/api/interface/include/exchangepool.hpp

@@ -1,8 +1,6 @@
 #pragma once
 
-#include <forward_list>
 #include <span>
-#include <string_view>
 
 #include "binancepublicapi.hpp"
 #include "bithumbpublicapi.hpp"
@@ -21,13 +19,6 @@ class CoincenterInfo;
 class FiatConverter;
 
 namespace api {
-class BinancePrivate;
-class BithumbPrivate;
-class HuobiPrivate;
-class KrakenPrivate;
-class KucoinPrivate;
-class UpbitPrivate;
-
 class CommonAPI;
 class APIKeysProvider;
 }  // namespace api
@@ -37,13 +28,6 @@ class ExchangePool {
   ExchangePool(const CoincenterInfo& coincenterInfo, FiatConverter& fiatConverter, api::CommonAPI& commonAPI,
                const api::APIKeysProvider& apiKeyProvider);
 
-  ExchangePool(const ExchangePool&) = delete;
-  ExchangePool(ExchangePool&&) = delete;
-  ExchangePool& operator=(const ExchangePool&) = delete;
-  ExchangePool& operator=(ExchangePool&&) = delete;
-
-  ~ExchangePool();
-
   std::span<Exchange> exchanges() { return _exchanges; }
   std::span<const Exchange> exchanges() const { return _exchanges; }
 
@@ -63,16 +47,6 @@ class ExchangePool {
   api::KucoinPublic _kucoinPublic;
   api::UpbitPublic _upbitPublic;
 
-  // Private exchanges (based on provided keys)
-  // Use std::forward_list to guarantee validity of the iterators and pointers, as we give them to Exchange object as
-  // pointers
-  std::forward_list<api::BinancePrivate> _binancePrivates;
-  std::forward_list<api::BithumbPrivate> _bithumbPrivates;
-  std::forward_list<api::HuobiPrivate> _huobiPrivates;
-  std::forward_list<api::KrakenPrivate> _krakenPrivates;
-  std::forward_list<api::KucoinPrivate> _kucoinPrivates;
-  std::forward_list<api::UpbitPrivate> _upbitPrivates;
-
   ExchangeVector _exchanges;
 };
 

src/api/interface/src/exchange.cpp

@@ -8,22 +8,20 @@
 #include "exchangeconfig.hpp"
 #include "exchangeprivateapi.hpp"
 #include "exchangepublicapi.hpp"
-#include "marketorderbook.hpp"
-#include "public-trade-vector.hpp"
 
 namespace cct {
 
-Exchange::Exchange(const ExchangeConfig &exchangeConfig, api::ExchangePublic &exchangePublic,
-                   api::ExchangePrivate &exchangePrivate)
-    : _exchangePublic(exchangePublic),
-      _pExchangePrivate(std::addressof(exchangePrivate)),
-      _exchangeConfig(exchangeConfig) {}
+Exchange::Exchange(const ExchangeConfig &exchangeConfig, ExchangePublic &exchangePublic)
+    : Exchange(exchangeConfig, exchangePublic, std::unique_ptr<ExchangePrivate>()) {}
 
-Exchange::Exchange(const ExchangeConfig &exchangeConfig, api::ExchangePublic &exchangePublic)
-    : _exchangePublic(exchangePublic), _exchangeConfig(exchangeConfig) {}
+Exchange::Exchange(const ExchangeConfig &exchangeConfig, ExchangePublic &exchangePublic,
+                   std::unique_ptr<ExchangePrivate> exchangePrivate)
+    : _pExchangePublic(std::addressof(exchangePublic)),
+      _exchangePrivate(std::move(exchangePrivate)),
+      _pExchangeConfig(std::addressof(exchangeConfig)) {}
 
 bool Exchange::canWithdraw(CurrencyCode currencyCode, const CurrencyExchangeFlatSet &currencyExchangeSet) const {
-  if (_exchangeConfig.excludedCurrenciesWithdrawal().contains(currencyCode)) {
+  if (_pExchangeConfig->excludedCurrenciesWithdrawal().contains(currencyCode)) {
     return false;
   }
   auto lb = currencyExchangeSet.find(currencyCode);
@@ -43,17 +41,17 @@ bool Exchange::canDeposit(CurrencyCode currencyCode, const CurrencyExchangeFlatS
   return lb->canDeposit();
 }
 
-MarketOrderBook Exchange::queryOrderBook(Market mk, int depth) { return _exchangePublic.queryOrderBook(mk, depth); }
+MarketOrderBook Exchange::queryOrderBook(Market mk, int depth) { return apiPublic().queryOrderBook(mk, depth); }
 
 /// Retrieve an ordered vector of recent last trades
 PublicTradeVector Exchange::queryLastTrades(Market mk, int nbTrades) {
-  return _exchangePublic.queryLastTrades(mk, nbTrades);
+  return apiPublic().queryLastTrades(mk, nbTrades);
 }
 
 void Exchange::updateCacheFile() const {
-  _exchangePublic.updateCacheFile();
-  if (_pExchangePrivate != nullptr) {
-    _pExchangePrivate->updateCacheFile();
+  apiPublic().updateCacheFile();
+  if (_exchangePrivate) {
+    _exchangePrivate->updateCacheFile();
   }
 }
 }  // namespace cct

src/api/interface/src/exchangepool.cpp

@@ -1,11 +1,13 @@
 #include "exchangepool.hpp"
 
+#include <memory>
 #include <string_view>
 
 #include "apikey.hpp"
 #include "apikeysprovider.hpp"
 #include "binanceprivateapi.hpp"
 #include "bithumbprivateapi.hpp"
+#include "bithumbpublicapi.hpp"
 #include "cct_const.hpp"
 #include "cct_exception.hpp"
 #include "cct_log.hpp"
@@ -53,21 +55,21 @@ ExchangePool::ExchangePool(const CoincenterInfo& coincenterInfo, FiatConverter&
     const ExchangeConfig& exchangeConfig = _coincenterInfo.exchangeConfig(exchangePublic->name());
     if (canUsePrivateExchange) {
       for (std::string_view keyName : _apiKeyProvider.getKeyNames(exchangeStr)) {
-        api::ExchangePrivate* exchangePrivate;
+        std::unique_ptr<api::ExchangePrivate> exchangePrivate;
         ExchangeName exchangeName(exchangeStr, keyName);
         const api::APIKey& apiKey = _apiKeyProvider.get(exchangeName);
         if (exchangePublic == &_binancePublic) {
-          exchangePrivate = &_binancePrivates.emplace_front(_coincenterInfo, _binancePublic, apiKey);
+          exchangePrivate = std::make_unique<api::BinancePrivate>(_coincenterInfo, _binancePublic, apiKey);
         } else if (exchangePublic == &_bithumbPublic) {
-          exchangePrivate = &_bithumbPrivates.emplace_front(_coincenterInfo, _bithumbPublic, apiKey);
+          exchangePrivate = std::make_unique<api::BithumbPrivate>(_coincenterInfo, _bithumbPublic, apiKey);
         } else if (exchangePublic == &_huobiPublic) {
-          exchangePrivate = &_huobiPrivates.emplace_front(_coincenterInfo, _huobiPublic, apiKey);
+          exchangePrivate = std::make_unique<api::HuobiPrivate>(_coincenterInfo, _huobiPublic, apiKey);
         } else if (exchangePublic == &_krakenPublic) {
-          exchangePrivate = &_krakenPrivates.emplace_front(_coincenterInfo, _krakenPublic, apiKey);
+          exchangePrivate = std::make_unique<api::KrakenPrivate>(_coincenterInfo, _krakenPublic, apiKey);
         } else if (exchangePublic == &_kucoinPublic) {
-          exchangePrivate = &_kucoinPrivates.emplace_front(_coincenterInfo, _kucoinPublic, apiKey);
+          exchangePrivate = std::make_unique<api::KucoinPrivate>(_coincenterInfo, _kucoinPublic, apiKey);
         } else if (exchangePublic == &_upbitPublic) {
-          exchangePrivate = &_upbitPrivates.emplace_front(_coincenterInfo, _upbitPublic, apiKey);
+          exchangePrivate = std::make_unique<api::UpbitPrivate>(_coincenterInfo, _upbitPublic, apiKey);
         } else {
           throw exception("Unsupported platform {}", exchangeStr);
         }
@@ -81,7 +83,7 @@ ExchangePool::ExchangePool(const CoincenterInfo& coincenterInfo, FiatConverter&
           }
         }
 
-        _exchanges.emplace_back(exchangeConfig, *exchangePublic, *exchangePrivate);
+        _exchanges.emplace_back(exchangeConfig, *exchangePublic, std::move(exchangePrivate));
       }
     } else {
       _exchanges.emplace_back(exchangeConfig, *exchangePublic);
@@ -90,6 +92,4 @@ ExchangePool::ExchangePool(const CoincenterInfo& coincenterInfo, FiatConverter&
   _exchanges.shrink_to_fit();
 }
 
-ExchangePool::~ExchangePool() = default;
-
 }  // namespace cct