bool
CreateGameTransactions (CNameDB& nameDb, const GameState& gameState,
const StepResult& stepResult,
std::vector<CTransaction>& outvgametx)
{
if (fDebug)
printf ("Constructing game tx @%d...\n", gameState.nHeight);
// Create resulting game transactions
// Transaction hashes must be unique
outvgametx.clear ();
CTransaction txNew;
txNew.SetGameTx ();
// Destroy name-coins of killed players
const PlayerSet& killedPlayers = stepResult.GetKilledPlayers ();
const KilledByMap& killedBy = stepResult.GetKilledBy ();
txNew.vin.reserve (killedPlayers.size ());
BOOST_FOREACH(const PlayerID &victim, killedPlayers)
{
const vchType vchName = vchFromString (victim);
CTransaction tx;
if (!GetTxOfNameAtHeight (nameDb, vchName, gameState.nHeight, tx))
return error ("Game engine killed a non-existing player %s",
victim.c_str ());
if (fDebug)
printf (" killed: %s\n", victim.c_str ());
CTxIn txin(tx.GetHash (), IndexOfNameOutput (tx));
/* List all killers, if player was simultaneously killed by several
other players. If the reason was not KILLED_DESTRUCT, handle
it also. If multiple reasons apply, the game tx is constructed
for the first reason according to the ordering inside of KilledByMap.
(Which in turn is determined by the enum values for KILLED_*.) */
typedef KilledByMap::const_iterator Iter;
const std::pair<Iter, Iter> iters = killedBy.equal_range (victim);
if (iters.first == iters.second)
return error ("No reason for killed player %s", victim.c_str ());
const KilledByInfo::Reason reason = iters.first->second.reason;
/* Unless we have destruct, there should be exactly one entry with
the "first" reason. There may be multiple entries for different
reasons, for instance, killed by poison and staying in spawn
area at the same time. */
{
Iter it = iters.first;
++it;
if (reason != KilledByInfo::KILLED_DESTRUCT && it != iters.second
&& reason == it->second.reason)
return error ("Multiple same-reason, non-destruct killed-by"
" entries for %s", victim.c_str ());
}
switch (reason)
{
case KilledByInfo::KILLED_DESTRUCT:
txin.scriptSig << vchName << GAMEOP_KILLED_BY;
for (Iter it = iters.first; it != iters.second; ++it)
{
if (it->second.reason != KilledByInfo::KILLED_DESTRUCT)
{
assert (it != iters.first);
break;
}
txin.scriptSig << vchFromString (it->second.killer.ToString ());
}
break;
case KilledByInfo::KILLED_SPAWN:
txin.scriptSig << vchName << GAMEOP_KILLED_BY;
break;
case KilledByInfo::KILLED_POISON:
txin.scriptSig << vchName << GAMEOP_KILLED_POISON;
break;
default:
assert (false);
}
txNew.vin.push_back (txin);
}
if (!txNew.IsNull ())
{
outvgametx.push_back (txNew);
if (fDebug)
printf ("Game tx for killed players: %s\n", txNew.GetHashForLog ());
}
/* Pay bounties to the players who collected them. The transaction
inputs are just "dummy" containing informational messages. */
txNew.SetNull ();
txNew.SetGameTx ();
txNew.vin.reserve (stepResult.bounties.size ());
txNew.vout.reserve (stepResult.bounties.size ());
BOOST_FOREACH(const CollectedBounty& bounty, stepResult.bounties)
{
const vchType vchName = vchFromString (bounty.character.player);
CTransaction tx;
if (!GetTxOfNameAtHeight (nameDb, vchName, gameState.nHeight, tx))
return error ("Game engine created bounty for non-existing player");
CTxOut txout;
txout.nValue = bounty.loot.nAmount;
if (!bounty.address.empty ())
{
/* Player-provided addresses are validated before accepting them,
so failing here is ok. */
if (!txout.scriptPubKey.SetBitcoinAddress (bounty.address))
return error ("Failed to set player-provided address for bounty");
}
else
{
// TODO: Maybe pay to the script of the name-tx without extracting the address first
// (see source of GetNameAddress - it obtains the script by calling RemoveNameScriptPrefix)
uint160 addr;
if (!GetNameAddress (tx, addr))
return error("Cannot get name address for bounty");
txout.scriptPubKey.SetBitcoinAddress (addr);
}
txNew.vout.push_back (txout);
CTxIn txin;
txin.scriptSig
<< vchName << GAMEOP_COLLECTED_BOUNTY
<< bounty.character.index
<< bounty.loot.firstBlock
<< bounty.loot.lastBlock
<< bounty.loot.collectedFirstBlock
<< bounty.loot.collectedLastBlock;
txNew.vin.push_back (txin);
}
if (!txNew.IsNull ())
{
outvgametx.push_back (txNew);
if (fDebug)
printf ("Game tx for bounties: %s\n", txNew.GetHashForLog ());
}
return true;
}
