1 files changed, 102 insertions, 0 deletions
diff --git a/src/alert.h b/src/alert.h
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+++ b/src/alert.h
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+// Copyright (c) 2010 Satoshi Nakamoto
+// Copyright (c) 2009-2012 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef _BITCOINALERT_H_
+#define _BITCOINALERT_H_ 1
+
+#include <set>
+#include <string>
+
+#include "uint256.h"
+#include "util.h"
+
+class CNode;
+
+/** Alerts are for notifying old versions if they become too obsolete and
+ * need to upgrade.  The message is displayed in the status bar.
+ * Alert messages are broadcast as a vector of signed data.  Unserializing may
+ * not read the entire buffer if the alert is for a newer version, but older
+ * versions can still relay the original data.
+ */
+class CUnsignedAlert
+{
+public:
+    int nVersion;
+    int64 nRelayUntil;      // when newer nodes stop relaying to newer nodes
+    int64 nExpiration;
+    int nID;
+    int nCancel;
+    std::set<int> setCancel;
+    int nMinVer;            // lowest version inclusive
+    int nMaxVer;            // highest version inclusive
+    std::set<std::string> setSubVer;  // empty matches all
+    int nPriority;
+
+    // Actions
+    std::string strComment;
+    std::string strStatusBar;
+    std::string strReserved;
+
+    IMPLEMENT_SERIALIZE
+    (
+        READWRITE(this->nVersion);
+        nVersion = this->nVersion;
+        READWRITE(nRelayUntil);
+        READWRITE(nExpiration);
+        READWRITE(nID);
+        READWRITE(nCancel);
+        READWRITE(setCancel);
+        READWRITE(nMinVer);
+        READWRITE(nMaxVer);
+        READWRITE(setSubVer);
+        READWRITE(nPriority);
+
+        READWRITE(strComment);
+        READWRITE(strStatusBar);
+        READWRITE(strReserved);
+    )
+
+    void SetNull();
+
+    std::string ToString() const;
+    void print() const;
+};
+
+/** An alert is a combination of a serialized CUnsignedAlert and a signature. */
+class CAlert : public CUnsignedAlert
+{
+public:
+    std::vector<unsigned char> vchMsg;
+    std::vector<unsigned char> vchSig;
+
+    CAlert()
+    {
+        SetNull();
+    }
+
+    IMPLEMENT_SERIALIZE
+    (
+        READWRITE(vchMsg);
+        READWRITE(vchSig);
+    )
+
+    void SetNull();
+    bool IsNull() const;
+    uint256 GetHash() const;
+    bool IsInEffect() const;
+    bool Cancels(const CAlert& alert) const;
+    bool AppliesTo(int nVersion, std::string strSubVerIn) const;
+    bool AppliesToMe() const;
+    bool RelayTo(CNode* pnode) const;
+    bool CheckSignature() const;
+    bool ProcessAlert();
+
+    /*
+     * Get copy of (active) alert object by hash. Returns a null alert if it is not found.
+     */
+    static CAlert getAlertByHash(const uint256 &hash);
+};
+
+#endif