support get_height_by_date(year, month, day)

src/wallet/monero_wallet.h

@@ -381,6 +381,18 @@ namespace monero {
     virtual uint64_t get_daemon_max_peer_height() const {
       throw std::runtime_error("get_daemon_max_peer_height() not supported");
     }
+    
+    /**
+     * Get the blockchain's height by date.
+     * 
+     * @param year - year of the height to get
+     * @param month - month of the height to get as a number between 1 and 12
+     * @param day - day of the height to get as a number between 1 and 31
+     * @return the blockchain's height at the given date
+     */
+    virtual uint64_t get_height_by_date(uint16_t year, uint8_t month, uint8_t day) const {
+      throw std::runtime_error("get_height_by_date(year, month, day) not supported");
+    }
 
     /**
      * Register a listener receive wallet notifications.

src/wallet/monero_wallet_core.cpp

@@ -1265,6 +1265,10 @@ namespace monero {
     if (result == 0) result = get_daemon_height();  // TODO monero core: target height can be 0 when daemon is synced.  Use blockchain height instead
     return result;
   }
+  
+  uint64_t monero_wallet_core::get_height_by_date(uint16_t year, uint8_t month, uint8_t day) const {
+    return m_w2->get_blockchain_height_by_date(year, month, day);
+  }
 
   void monero_wallet_core::add_listener(monero_wallet_listener& listener) {
     MTRACE("add_listener()");

src/wallet/monero_wallet_core.h

@@ -196,6 +196,7 @@ namespace monero {
     void set_sync_height(uint64_t sync_height) override;
     uint64_t get_daemon_height() const override;
     uint64_t get_daemon_max_peer_height() const override;
+    uint64_t get_height_by_date(uint16_t year, uint8_t month, uint8_t day) const override;
     void add_listener(monero_wallet_listener& listener) override;
     void remove_listener(monero_wallet_listener& listener) override;
     std::set<monero_wallet_listener*> get_listeners() override;