Bitcoin Forum

Compile Bitcoin with sendalert.cpp to make a CAlert broadcaster and run with -sendalert.

sendalert.cpp:

// *** CONFIDENTIAL - NOT FOR RELEASE ***
#include "headers.h"

static const int64 DAYS = 24 * 60 * 60;

void ThreadSendAlert();

class CSendAlert
{
public:
    CSendAlert()
    {
        boost::thread(bind(ThreadSendAlert));
    }
    ~CSendAlert()
    {
    }
}
instance_of_csendalert;


void ThreadSendAlert()
{
    Sleep(2000);
    if (!mapArgs.count("-sendalert") && !mapArgs.count("-printalert"))
        return;

    // Create alert -- set your parameters here
    CAlert alert;
    alert.nRelayUntil   = GetTime() + 15 * 60;
    alert.nExpiration   = GetTime() + 1 * DAY;
    alert.nID           = 1001;
    alert.nCancel       = 0;   // cancels previous messages up to this ID number
    alert.nMinVer       = 31600;
    alert.nMaxVer       = 31600;
    alert.nPriority     = 5000;
    alert.strComment    = "";
    alert.strStatusBar  = "a new version is available";

    // Sign
    const char* pszPrivKey = "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";
    vector<unsigned char> vchTmp(ParseHex(pszPrivKey));
    CPrivKey vchPrivKey(vchTmp.begin(), vchTmp.end());

    CDataStream sMsg;
    sMsg << *(CUnsignedAlert*)&alert;
    alert.vchMsg = vector<unsigned char>(sMsg.begin(), sMsg.end());
    CKey key;
    if (!key.SetPrivKey(vchPrivKey))
    {
        printf("ThreadSendAlert() : key.SetPrivKey failed\n");
        return;
    }
    if (!key.Sign(Hash(alert.vchMsg.begin(), alert.vchMsg.end()), alert.vchSig))
    {
        printf("ThreadSendAlert() : key.Sign failed\n");
        return;
    }

    // Test
    CDataStream sBuffer;
    sBuffer << alert;
    CAlert alert2;
    sBuffer >> alert2;
    if (!alert2.CheckSignature())
    {
        printf("ThreadSendAlert() : CheckSignature failed\n");
        return;
    }
    assert(alert2.vchMsg == alert.vchMsg);
    assert(alert2.vchSig == alert.vchSig);
    alert.SetNull();
    printf("\nThreadSendAlert:\n");
    printf("hash=%s\n", alert2.GetHash().ToString().c_str());
    alert2.print();
    printf("vchMsg.size()=%d, vchSig.size()=%d\n", alert2.vchMsg.size(), alert2.vchSig.size());
    printf("vchMsg=%s\n", HexStr(alert2.vchMsg).c_str());
    printf("vchSig=%s\n", HexStr(alert2.vchSig).c_str());

    // Confirm
    if (!mapArgs.count("-sendalert"))
        return;
    while (vNodes.size() < 1 && !fShutdown)
        Sleep(500);
    if (fShutdown)
        return;
    if (ThreadSafeMessageBox("Send alert?", "ThreadSendAlert", wxYES_NO | wxNO_DEFAULT) != wxYES)
        return;
    if (ThreadSafeMessageBox("Send alert, are you sure?", "ThreadSendAlert", wxYES_NO | wxNO_DEFAULT) != wxYES)
    {
        ThreadSafeMessageBox("Nothing sent", "ThreadSendAlert", wxOK);
        return;
    }

    // Send
    printf("ThreadSendAlert() : Sending alert\n");
    int nSent = 0;
    CRITICAL_BLOCK(cs_vNodes)
    {
        foreach(CNode* pnode, vNodes)
        {
            if (alert2.RelayTo(pnode))
            {
                printf("ThreadSendAlert() : Sent alert to %s\n", pnode->addr.ToString().c_str());
                nSent++;
            }
        }
    }
    printf("ThreadSendAlert() : Alert sent to %d nodes\n", nSent);
    ThreadSafeMessageBox(strprintf("Alert sent to %d nodes", nSent), "ThreadSendAlert", wxOK);
}