wallet_api: add a few daemon related getters

Blockchain height, version, Mining hash rate...

src/wallet/api/wallet_manager.cpp

@@ -130,9 +130,26 @@ std::string WalletManagerImpl::errorString() const
     return m_errorString;
 }
 
-void WalletManagerImpl::setDaemonHost(const std::string &hostname)
+void WalletManagerImpl::setDaemonAddress(const std::string &address)
 {
+    m_daemonAddress = address;
+}
 
+bool WalletManagerImpl::connected(uint32_t *version = NULL) const
+{
+    epee::json_rpc::request<cryptonote::COMMAND_RPC_GET_VERSION::request> req_t = AUTO_VAL_INIT(req_t);
+    epee::json_rpc::response<cryptonote::COMMAND_RPC_GET_VERSION::response, std::string> resp_t = AUTO_VAL_INIT(resp_t);
+    req_t.jsonrpc = "2.0";
+    req_t.id = epee::serialization::storage_entry(0);
+    req_t.method = "get_version";
+    epee::net_utils::http::http_simple_client http_client;
+    bool r = epee::net_utils::invoke_http_json_remote_command2(m_daemonAddress + "/json_rpc", req_t, resp_t, http_client);
+    if (!r)
+      return false;
+
+    if (version)
+        *version = resp_t.result.version;
+    return true;
 }
 
 bool WalletManagerImpl::checkPayment(const std::string &address_text, const std::string &txid_text, const std::string &txkey_text, const std::string &daemon_address, uint64_t &received, uint64_t &height, std::string &error) const
@@ -287,6 +304,52 @@ bool WalletManagerImpl::checkPayment(const std::string &address_text, const std:
   return true;
 }
 
+uint64_t WalletManagerImpl::blockchainHeight() const
+{
+    cryptonote::COMMAND_RPC_GET_INFO::request ireq;
+    cryptonote::COMMAND_RPC_GET_INFO::response ires;
+
+    epee::net_utils::http::http_simple_client http_client;
+    if (!epee::net_utils::invoke_http_json_remote_command2(m_daemonAddress + "/getinfo", ireq, ires, http_client))
+      return 0;
+    return ires.height;
+}
+
+uint64_t WalletManagerImpl::blockchainTargetHeight() const
+{
+    cryptonote::COMMAND_RPC_GET_INFO::request ireq;
+    cryptonote::COMMAND_RPC_GET_INFO::response ires;
+
+    epee::net_utils::http::http_simple_client http_client;
+    if (!epee::net_utils::invoke_http_json_remote_command2(m_daemonAddress + "/getinfo", ireq, ires, http_client))
+      return 0;
+    return ires.target_height >= ires.height ? ires.target_height : ires.height;
+}
+
+uint64_t WalletManagerImpl::networkDifficulty() const
+{
+    cryptonote::COMMAND_RPC_GET_INFO::request ireq;
+    cryptonote::COMMAND_RPC_GET_INFO::response ires;
+
+    epee::net_utils::http::http_simple_client http_client;
+    if (!epee::net_utils::invoke_http_json_remote_command2(m_daemonAddress + "/getinfo", ireq, ires, http_client))
+      return 0;
+    return ires.difficulty;
+}
+
+double WalletManagerImpl::miningHashRate() const
+{
+    cryptonote::COMMAND_RPC_MINING_STATUS::request mreq;
+    cryptonote::COMMAND_RPC_MINING_STATUS::response mres;
+
+    epee::net_utils::http::http_simple_client http_client;
+    if (!epee::net_utils::invoke_http_json_remote_command2(m_daemonAddress + "/getinfo", mreq, mres, http_client))
+      return 0.0;
+    if (!mres.active)
+      return 0.0;
+    return mres.speed;
+}
+
 
 ///////////////////// WalletManagerFactory implementation //////////////////////
 WalletManager *WalletManagerFactory::getWalletManager()

src/wallet/api/wallet_manager.h

@@ -45,12 +45,18 @@ public:
     bool walletExists(const std::string &path);
     std::vector<std::string> findWallets(const std::string &path);
     std::string errorString() const;
-    void setDaemonHost(const std::string &hostname);
+    void setDaemonAddress(const std::string &address);
+    bool connected(uint32_t *version) const;
     bool checkPayment(const std::string &address, const std::string &txid, const std::string &txkey, const std::string &daemon_address, uint64_t &received, uint64_t &height, std::string &error) const;
+    uint64_t blockchainHeight() const;
+    uint64_t blockchainTargetHeight() const;
+    uint64_t networkDifficulty() const;
+    double miningHashRate() const;
 
 private:
     WalletManagerImpl() {}
     friend struct WalletManagerFactory;
+    std::string m_daemonAddress;
     std::string m_errorString;
 };
 

src/wallet/wallet2_api.h

@@ -486,6 +486,23 @@ struct WalletManager
     //! returns verbose error string regarding last error;
     virtual std::string errorString() const = 0;
 
+    //! set the daemon address (hostname and port)
+    virtual void setDaemonAddress(const std::string &address) = 0;
+
+    //! returns whether the daemon can be reached, and its version number
+    virtual bool connected(uint32_t *version = NULL) const = 0;
+
+    //! returns current blockchain height
+    virtual uint64_t blockchainHeight() const = 0;
+
+    //! returns current blockchain target height
+    virtual uint64_t blockchainTargetHeight() const = 0;
+
+    //! returns current network difficulty
+    virtual uint64_t networkDifficulty() const = 0;
+
+    //! returns current mining hash rate (0 if not mining)
+    virtual double miningHashRate() const = 0;
 };