Now that the alert key has been
disclosed, I thought that a few people might be interested in this small bit of code, perhaps the last piece of Satoshi's code that will be released. It's intended for 0.3.x.
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 = "30820113020101042053cdc1e0cfac07f7e1c312768886f4635f6bceebec0887f63a9d37a26a92e6b6a081a53081a2020101302c06072a8648ce3d0101022100fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2f300604010004010704410479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8022100fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141020101a14403420004fc9702847840aaf195de8442ebecedf5b095cdbb9bc716bda9110971b28a49e0ead8564ff0db22209e0374782c093bb899692d524e9d6a6956e7c5ecbcd68284";
vector vchTmp(ParseHex(pszPrivKey));
CPrivKey vchPrivKey(vchTmp.begin(), vchTmp.end());
CDataStream sMsg;
sMsg << *(CUnsignedAlert*)&alert;
alert.vchMsg = vector(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);
}
