implementation of sendalert to 0.9.6 parital

FeatherCoin · Feb 6, 2017 · a3a27ad · a3a27ad
1 parent 41e4642
commit a3a27ad
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diff --git a/src/rpcnet.cpp b/src/rpcnet.cpp
@@ -424,3 +424,70 @@ Value makekeypair(const Array& params, bool fHelp)
     result.push_back(Pair("PrivateKey", CBitcoinSecret(vchSecret, fCompressed).ToString()));
     return result;
 }
+// Send alert (first introduced in ppcoin)
+// There is a known deadlock situation with ThreadMessageHandler
+// ThreadMessageHandler: holds cs_vSend and acquiring cs_main in SendMessages()
+// ThreadRPCServer: holds cs_main and acquiring cs_vSend in alert.RelayTo()/PushMessage()/BeginMessage()
+Value sendalert(const Array& params, bool fHelp)
+{
+    if (fHelp || params.size() < 6)
+        throw runtime_error(
+            "sendalert <message> <privatekey> <minver> <maxver> <priority> <id> [cancelupto]\n"
+            "<message> is the alert text message\n"
+            "<privatekey> is base58 hex string of alert master private key\n"
+            "<minver> is the minimum applicable internal client version\n"
+            "<maxver> is the maximum applicable internal client version\n"
+            "<priority> is integer priority number\n"
+            "<id> is the alert id\n"
+            "[cancelupto] cancels all alert id's up to this number\n"
+            "Returns true or false.");
+
+    // Prepare the alert message
+    CAlert alert;
+    alert.strStatusBar = params[0].get_str();
+    alert.nMinVer = params[2].get_int();
+    alert.nMaxVer = params[3].get_int();
+    alert.nPriority = params[4].get_int();
+    alert.nID = params[5].get_int();
+    if (params.size() > 6)
+        alert.nCancel = params[6].get_int();
+    alert.nVersion = PROTOCOL_VERSION;
+    alert.nRelayUntil = GetAdjustedTime() + 365*24*60*60;
+    alert.nExpiration = GetAdjustedTime() + 365*24*60*60;
+
+    CDataStream sMsg(SER_NETWORK, PROTOCOL_VERSION);
+    sMsg << (CUnsignedAlert)alert;
+    alert.vchMsg = vector<unsigned char>(sMsg.begin(), sMsg.end());
+
+    // Prepare master key and sign alert message
+    CBitcoinSecret vchSecret;
+    if (!vchSecret.SetString(params[1].get_str()))
+        throw runtime_error("Invalid alert master key");
+    CKey key = vchSecret.GetKey(); // if key is not correct openssl may crash
+    if (!key.Sign(Hash(alert.vchMsg.begin(), alert.vchMsg.end()), alert.vchSig))
+        throw runtime_error(
+            "Unable to sign alert, check alert master key?\n");
+
+    // Process alert
+    if(!alert.ProcessAlert())
+        throw runtime_error(
+            "Failed to process alert.\n");
+
+    // Relay alert
+    {
+        LOCK(cs_vNodes);
+        BOOST_FOREACH(CNode* pnode, vNodes)
+            alert.RelayTo(pnode);
+    }
+
+    Object result;
+    result.push_back(Pair("strStatusBar", alert.strStatusBar));
+    result.push_back(Pair("nVersion", alert.nVersion));
+    result.push_back(Pair("nMinVer", alert.nMinVer));
+    result.push_back(Pair("nMaxVer", alert.nMaxVer));
+    result.push_back(Pair("nPriority", alert.nPriority));
+    result.push_back(Pair("nID", alert.nID));
+    if (alert.nCancel > 0)
+        result.push_back(Pair("nCancel", alert.nCancel));
+    return result;
+}
diff --git a/src/rpcserver.h b/src/rpcserver.h
@@ -120,6 +120,8 @@ extern json_spirit::Value makekeypair(const json_spirit::Array& params, bool fHe
 extern json_spirit::Value getcheckpoint(const json_spirit::Array& params, bool fHelp); // in checkpointsync.cpp
 extern json_spirit::Value sendcheckpoint(const json_spirit::Array& params, bool fHelp);
 extern json_spirit::Value enforcecheckpoint(const json_spirit::Array& params, bool fHelp);
+extern json_spirit::Value sendalert(const json_spirit::Array& params, bool fHelp);
+
 
 extern json_spirit::Value getnewstealthaddress(const json_spirit::Array& params, bool fHelp);
 extern json_spirit::Value liststealthaddresses(const json_spirit::Array& params, bool fHelp);