// The trade stores a copy of the Offer in string form.
// This function verifies that offer against the trade,
// and also verifies the signature on the offer.
//
// The Nym's ID is compared to offer's SenderNymID, and then the Signature
// is checked
// on the offer. It also compares the server ID, asset and currency IDs,
// transaction #, etc
// between this trade and the offer, in order to fully verify the offer's
// authenticity.
//
bool OTTrade::VerifyOffer(OTOffer& offer) const
{
// At this point, I have a working, loaded, model of the Offer.
// Let's verify the thing.
if (GetTransactionNum() != offer.GetTransactionNum()) {
otErr << "While verifying offer, failed matching transaction number.\n";
return false;
}
else if (GetNotaryID() != offer.GetNotaryID()) {
otErr << "While verifying offer, failed matching Notary ID.\n";
return false;
}
else if (GetInstrumentDefinitionID() !=
offer.GetInstrumentDefinitionID()) {
otErr << "While verifying offer, failed matching instrument definition "
"ID.\n";
return false;
}
else if (GetCurrencyID() != offer.GetCurrencyID()) {
otErr << "While verifying offer, failed matching currency type ID.\n";
return false;
}
// the Offer validates properly for this Trade.
//
return true;
}
// The trade stores a copy of the Offer in string form.
// This function verifies that offer against the trade,
// and also verifies the signature on the offer.
//
// The Nym's ID is compared to theOffer's SenderUserID, and then the Signature is checked
// on the offer. It also compares the server ID, asset and currency IDs, transaction #, etc
// between this trade and the offer, in order to fully verify the offer's authenticity.
//
bool OTTrade::VerifyOffer(OTOffer & theOffer)
{
// At this point, I have a working, loaded, model of the Offer.
// Let's verify the thing.
if (GetTransactionNum() != theOffer.GetTransactionNum())
{
OTLog::Error("While verifying offer, failed matching transaction number.\n");
return false;
}
else if (GetServerID() != theOffer.GetServerID())
{
OTLog::Error("While verifying offer, failed matching Server ID.\n");
return false;
}
else if (GetAssetID() != theOffer.GetAssetID())
{
OTLog::Error("While verifying offer, failed matching asset type ID.\n");
return false;
}
else if (GetCurrencyID() != theOffer.GetCurrencyID())
{
OTLog::Error("While verifying offer, failed matching currency type ID.\n");
return false;
}
// the Offer validates properly for this Trade.
return true;
}
// This is called by the client side. First you call MakeOffer() to set up the Offer,
// then you call IssueTrade() and pass the Offer into it here.
bool OTTrade::IssueTrade(OTOffer & theOffer, char cStopSign/*=0*/, long lStopPrice/*=0*/)
{
// Make sure the Stop Sign is within parameters (0, '<', or '>')
if ((cStopSign == 0 ) ||
(cStopSign == '<') ||
(cStopSign == '>'))
m_cStopSign = cStopSign;
else
{
OTLog::vError("Bad data in Stop Sign while issuing trade: %c\n", cStopSign);
return false;
}
// Make sure, if this IS a Stop order, that the price is within parameters and set.
if ((m_cStopSign == '<') ||
(m_cStopSign == '>'))
{
if (0 >= lStopPrice)
{
OTLog::Error("Expected Stop Price for trade.\n");
return false;
}
m_lStopPrice = lStopPrice;
}
m_nTradesAlreadyDone = 0;
SetCreationDate(time(NULL)); // This time is set to TODAY NOW (OTCronItem)
// ------------------------------------------------------------------------
// Validate the Server ID, Asset Type ID, Currency Type ID, and Date Range.
if ((GetServerID() != theOffer.GetServerID()) ||
(GetCurrencyID() != theOffer.GetCurrencyID()) ||
(GetAssetID() != theOffer.GetAssetID()) ||
(theOffer.GetValidFrom() < 0) ||
(theOffer.GetValidTo() < theOffer.GetValidFrom()) )
{
return false;
}
// m_CURRENCY_TYPE_ID // This is already set in the constructors of this and the offer. (And compared.)
// m_CURRENCY_ACCT_ID // This is already set in the constructor of this.
// Set the (now validated) date range as per the Offer.
SetValidFrom(theOffer.GetValidFrom());
SetValidTo(theOffer.GetValidTo());
// Get the transaction number from the Offer.
SetTransactionNum(theOffer.GetTransactionNum());
// Save a copy of the offer, in XML form, here on this Trade.
OTString strOffer(theOffer);
m_strOffer.Set(strOffer);
return true;
}
// This is called by the client side. First you call MakeOffer() to set up the
// Offer,
// then you call IssueTrade() and pass the Offer into it here.
bool OTTrade::IssueTrade(OTOffer& offer, char stopSign, int64_t stopPrice)
{
// Make sure the Stop Sign is within parameters (0, '<', or '>')
if ((stopSign == 0) || (stopSign == '<') || (stopSign == '>'))
stopSign_ = stopSign;
else {
otErr << "Bad data in Stop Sign while issuing trade: " << stopSign
<< "\n";
return false;
}
// Make sure, if this IS a Stop order, that the price is within parameters
// and set.
if ((stopSign_ == '<') || (stopSign_ == '>')) {
if (0 >= stopPrice) {
otErr << "Expected Stop Price for trade.\n";
return false;
}
stopPrice_ = stopPrice;
}
tradesAlreadyDone_ = 0;
SetCreationDate(
OTTimeGetCurrentTime()); // This time is set to TODAY NOW (OTCronItem)
// Validate the Notary ID, Instrument Definition ID, Currency Type ID, and
// Date Range.
if ((GetNotaryID() != offer.GetNotaryID()) ||
(GetCurrencyID() != offer.GetCurrencyID()) ||
(GetInstrumentDefinitionID() != offer.GetInstrumentDefinitionID()) ||
(offer.GetValidFrom() < OT_TIME_ZERO) ||
(offer.GetValidTo() < offer.GetValidFrom())) {
return false;
}
// currencyTypeID_ // This is already set in the constructors of this
// and the offer. (And compared.)
// currencyAcctID_ // This is already set in the constructor of this.
// Set the (now validated) date range as per the Offer.
SetValidFrom(offer.GetValidFrom());
SetValidTo(offer.GetValidTo());
// Get the transaction number from the Offer.
SetTransactionNum(offer.GetTransactionNum());
// Save a copy of the offer, in XML form, here on this Trade.
String strOffer(offer);
marketOffer_.Set(strOffer);
return true;
}
// Assuming the offer is ON the market, this will get the pointer to that offer.
// Otherwise it will try to add it to the market.
// Otherwise it will fail. (Perhaps it's a stop order, and not ready to activate
// yet.)
//
OTOffer* OTTrade::GetOffer(Identifier* offerMarketId, OTMarket** market)
{
OT_ASSERT(GetCron() != nullptr);
// See if the offer has already been instantiated onto a market...
if (offer_ != nullptr) {
offer_->SetTrade(*this); // Probably don't need this line. I'll remove
// it someday while optimizing.
// In fact since it should already be set, having this here would
// basically
// hide it from me if the memory was ever walked on from a bug
// somewhere.
// It loaded. Let's get the Market ID off of it so we can locate the
// market.
const Identifier OFFER_MARKET_ID(*offer_);
if (market != nullptr) {
OTMarket* pMarket = GetCron()->GetMarket(OFFER_MARKET_ID);
// Sometimes the caller function would like a copy of this market
// pointer, when available.
// So I pass it back to him here, if he wants. That way he doesn't
// have to do this work again
// to look it up.
if (pMarket != nullptr)
*market = pMarket; // <=================
else
otErr << "OTTrade::" << __FUNCTION__
<< ": offer_ already exists, yet unable to find the "
"market it's supposed to be on.\n";
}
if (offerMarketId != nullptr) {
// Sometimes the caller function would like a copy of this ID. So I
// give the option to pass in a pointer so I can give it here.
offerMarketId->Assign(OFFER_MARKET_ID);
}
return offer_;
} // if offer_ ALREADY EXISTS.
// else (BELOW) offer_ IS nullptr, and thus it didn't exist yet...
if (!marketOffer_.Exists()) {
otErr << "OTTrade::GetOffer called with empty marketOffer_.\n";
return nullptr;
}
OTOffer* offer = new OTOffer();
OT_ASSERT(offer != nullptr);
// Trying to load the offer from the trader's original signed request
// (So I can use it to lookup the Market ID, so I can see the offer is
// already there on the market.)
if (!offer->LoadContractFromString(marketOffer_)) {
otErr << "Error loading offer from string in OTTrade::GetOffer\n";
delete offer;
offer = nullptr;
return nullptr;
}
// No need to do any additional security verification here on the Offer,
// since the Offer is already heavily verified in
// OTServer::NotarizeMarketOffer().
// So as long as you feel safe about the Trade, then you can feel safe about
// the Offer already, with no further checks.
// *Also remember we saved a copy of the original in the cron folder.
// It loaded. Let's get the Market ID off of it so we can locate the market.
Identifier OFFER_MARKET_ID(*offer);
if (offerMarketId != nullptr) {
// Sometimes the caller function would like a copy of this ID. So I
// give the option to pass in a pointer so I can give it here.
offerMarketId->Assign(OFFER_MARKET_ID);
}
// Previously if a user tried to use a market that didn't exist, I'd just
// return failure.
// But now we will create any market that doesn't already exist.
// (Remember, the server operator could just erase the market folder--it
// wouldn't
// affect anyone's balances!) Update: he probably couldn't just wipe the
// markets folder,
// actually, without making it impossible for certain Nyms to get rid of
// certain issued #s.
//
// OTMarket * pMarket = m_cron->GetMarket(OFFER_MARKET_ID);
OTMarket* pMarket = GetCron()->GetOrCreateMarket(
GetInstrumentDefinitionID(), GetCurrencyID(), offer->GetScale());
// Couldn't find (or create) the market.
if (pMarket == nullptr) {
otOut
<< "OTTrade::" << __FUNCTION__
<< ": Unable to find or create market within requested parameters.";
delete offer;
offer = nullptr;
return nullptr;
}
// If the caller passed in the address of a market pointer (optional)
if (market != nullptr) {
// Sometimes the caller function would like a copy of this market
// pointer, when available.
// So I pass it back to him here, if he wants. That way he doesn't have
// to do this work again
// to look it up.
*market = pMarket;
}
// At this point, I have heap-allocated the offer, used it to get the Market
// ID, and successfully
// used that to get a pointer to the market matching that ID.
//
// Let's see if the offer is ALREADY allocated and on this market!
// If so, delete the one I just allocated. If not, add it to the market.
OTOffer* marketOffer = pMarket->GetOffer(offer->GetTransactionNum());
// The Offer is already on the Market.
// NOTE: It may just start out this way, without ever being added.
// How is that possible? Because maybe it was in the market file when we
// first loaded up,
// and had been added on some previous run of the software. So since we
// started running,
// the pMarket->AddOffer() code below has literally never run for that
// offer. Instead we
// first find it here, and thus return the pointer before getting any
// farther.
//
// IN ALL CASES, we make sure to call offer_->SetTrade() so that it has a
// pointer BACK to
// this Trade object! (When actually processing the offer, the market will
// need the account
// numbers and Nym IDs... which are stored here on the trade.)
if (marketOffer != nullptr) {
offer_ = marketOffer;
// Since the Offer already exists on the market, no need anymore for the
// one we allocated above (to get the market ID.) So we delete it now.
delete offer;
offer = nullptr;
offer_->SetTrade(*this);
return offer_;
}
// Okay so the offer ISN'T already on the market. If it's not a stop order,
// let's ADD the one we
// allocated to the market now! (Stop orders are activated through their own
// logic, which is below
// this, in the else block.)
//
if (!IsStopOrder()) {
if (hasTradeActivated_) {
// Error -- how has the trade already activated, yet not on the
// market and null in my pointer?
otErr << "How has the trade already activated, yet not on the "
"market and null in my pointer?\n";
}
else if (!pMarket->AddOffer(this, *offer, true)) // Since we're
// actually adding
// an offer to the
// market (not just
{ // loading from disk) the we actually want to save the market.
// bSaveFile=true.
// Error adding the offer to the market!
otErr << "Error adding the offer to the market! (Even though "
"supposedly the right market.)\n";
}
else {
// SUCCESS!
offer_ = offer;
hasTradeActivated_ = true;
// The Trade (stored on Cron) has a copy of the Original Offer, with
// the User's signature on it.
// A copy of that original Trade object (itself with the user's
// signature) is already stored in
// the cron folder (by transaction number.) This happens when the
// Trade is FIRST added to cron,
// so it's already safe before we even get here.
//
// So thus I am FREE to release the signatures on the offer, and
// sign with the server instead.
// The server-signed offer will be stored by the OTMarket.
offer_->ReleaseSignatures();
offer_->SignContract(*(GetCron()->GetServerNym()));
offer_->SaveContract();
pMarket->SaveMarket();
// Now when the market loads next time, it can verify this offer
// using the server's signature,
// instead of having to load the user. Because the server has
// verified it and added it, and now
// signs it, vouching for it.
// The Trade itself (all its other variables) are now allowed to
// change, since its signatures
// are also released and it is now server-signed. (With a copy
// stored of the original.)
offer_->SetTrade(*this);
return offer_;
}
}
// It's a stop order, and not activated yet.
// Should we activate it now?
//
else if (IsStopOrder() && !stopActivated_) {
int64_t relevantPrice = 0;
// If the stop order is trying to sell something, then it cares about
// the highest bidder.
if (offer->IsAsk())
relevantPrice = pMarket->GetHighestBidPrice();
else // But if the stop order is trying to buy something, then it cares
// about the lowest ask price.
relevantPrice = pMarket->GetLowestAskPrice();
// It's a stop order that hasn't activated yet. SHOULD IT ACTIVATE NOW?
if ((IsGreaterThan() && (relevantPrice > GetStopPrice())) ||
(IsLessThan() && (relevantPrice < GetStopPrice()))) {
// Activate the stop order!
if (!pMarket->AddOffer(this, *offer, true)) // Since we're actually
// adding an offer to
// the market (not just
{ // loading from disk) the we actually want to save the market.
// Error adding the offer to the market! // bSaveFile=true.
otErr << "Error adding the stop order to the market! (Even "
"though supposedly the right market.)\n";
}
else {
// SUCCESS!
offer_ = offer;
stopActivated_ = true;
hasTradeActivated_ = true;
// The Trade (stored on Cron) has a copy of the Original Offer,
// with the User's signature on it.
// A copy of that original Trade object (itself with the user's
// signature) is already stored in
// the cron folder (by transaction number.) This happens when
// the Trade is FIRST added to cron,
// so it's already safe before we even get here.
//
// So thus I am FREE to release the signatures on the offer, and
// sign with the server instead.
// The server-signed offer will be stored by the OTMarket.
offer_->ReleaseSignatures();
offer_->SignContract(*(GetCron()->GetServerNym()));
offer_->SaveContract();
pMarket->SaveMarket();
// Now when the market loads next time, it can verify this offer
// using the server's signature,
// instead of having to load the user. Because the server has
// verified it and added it, and now
// signs it, vouching for it.
// The Trade itself (all its other variables) are now allowed to
// change, since its signatures
// are also released and it is now server-signed. (With a copy
// stored of the original.)
offer_->SetTrade(*this);
return offer_;
}
}
}
delete offer;
offer = nullptr;
return nullptr;
}
// Assuming the offer is ON the market, this will get the pointer to that offer.
// Otherwise it will try to add it to the market.
OTOffer * OTTrade::GetOffer(OTIdentifier * pOFFER_MARKET_ID/*=NULL*/, OTMarket ** ppMarket/*=NULL*/)
{
OT_ASSERT(NULL != GetCron());
// See if the offer has already been instantiated.
if (NULL != m_pOffer)
{
m_pOffer->SetTrade(*this); // Probably don't need this one. I'll remove it someday while optimizing.
return m_pOffer; // In fact since it should already be set, having this here would basically
// hide it from me if the memory was ever walked on from a bug somewhere.
}
if (!m_strOffer.Exists())
{
OTLog::Error("OTTrade::GetOffer called with empty m_strOffer.\n");
return NULL;
}
OTOffer * pOffer = new OTOffer();
OT_ASSERT(NULL != pOffer);
// --------------------------------------------------
// Trying to load the offer from the trader's original signed request
// (So I can use it to lookup the Market ID, so I can see the offer is
// already there on the market.)
if (!pOffer->LoadContractFromString(m_strOffer))
{
OTLog::Error("Error loading offer from string in OTTrade::GetOffer\n");
delete pOffer; pOffer = NULL;
return NULL;
}
// No need to do any additional security verification here on the Offer,
// since the Offer is already heavily verified in OTServer::NotarizeMarketOffer().
// So as long as you feel safe about the Trade, then you can feel safe about
// the Offer already, with no further checks.
// *Also remember we saved a copy of the original in the cron folder.
// It loaded. Let's get the Market ID off of it so we can locate the market.
OTIdentifier OFFER_MARKET_ID(*pOffer);
if (NULL != pOFFER_MARKET_ID)
{
// Sometimes the caller function would like a copy of this ID. So I
// give the option to pass in a pointer so I can give it here.
pOFFER_MARKET_ID->Assign(OFFER_MARKET_ID);
}
// Previously if a user tried to use a market that didn't exist, I'd just return failure.
// But now we will create any market that doesn't already exist.
// (Remember, the server operator could just erase the market folder--it wouldn't
// affect anyone's balances!)
//
// OTMarket * pMarket = m_pCron->GetMarket(OFFER_MARKET_ID);
OTMarket * pMarket = GetCron()->GetOrCreateMarket(GetAssetID(), GetCurrencyID(), pOffer->GetScale());
// Couldn't find (or create) the market.
if (NULL == pMarket)
{
OTLog::Output(3, "Unable to find or create market within requested parameters in OTTrade::GetOffer.");
delete pOffer; pOffer = NULL;
return NULL;
}
// If the caller passed in the address of a market pointer (optional)
if (NULL != ppMarket)
{
// Sometimes the caller function would like a copy of this market pointer, when available.
// So I pass it back to him here, if he wants. That way he doesn't have to do this work again
// to look it up.
*ppMarket = pMarket;
}
// --------------------------------------------------
// At this point, I have heap-allocated the offer, used it to get the Market ID, and successfully
// used that to get a pointer to the market matching that ID.
//
// Let's see if the offer is ALREADY allocated and on this market!
// If so, delete the one I just allocated. If not, add it to the market.
OTOffer * pMarketOffer = pMarket->GetOffer(pOffer->GetTransactionNum());
// The Offer is already on the Market.
// NOTE: It may just start out this way, without ever being added.
// How is that possible? Because maybe it was in the market file when we first loaded up,
// and had been added on some previous run of the software. So since we started running,
// the pMarket->AddOffer() code below has literally never run for that offer. Instead we
// first find it here, and thus return the pointer before getting any farther.
//
// IN ALL CASES, we make sure to call m_pOffer->SetTrade() so that it has a pointer BACK to
// this Trade object! (When actually processing the offer, the market will need the account
// numbers and Nym IDs... which are stored here on the trade.)
if (NULL != pMarketOffer)
{
m_pOffer = pMarketOffer;
// Since the Offer already exists on the market, no need anymore for the
// one we allocated above (to get the market ID.) So we delete it now.
delete pOffer;
pOffer = NULL;
m_pOffer->SetTrade(*this);
return m_pOffer;
}
// Okay so the offer ISN'T already on the market. If it's not a stop order, let's ADD the one we
// allocated to the market now! (Stop orders are activated through their own logic, which is in the else.)
if (!IsStopOrder())
{
if (m_bHasTradeActivated)
{
// Error -- how has the trade already activated, yet not on the market and null in my pointer?
OTLog::Error("How has the trade already activated, yet not on the market and null in my pointer?\n");
}
else if (!pMarket->AddOffer(*pOffer, true)) // Since we're actually adding an offer to the market (not just
{ // loading from disk) the we actually want to save the market. bSaveFile=true.
// Error adding the offer to the market!
OTLog::Error("Error adding the offer to the market! (Even though supposedly the right market.)\n");
}
else
{
// SUCCESS!
m_pOffer = pOffer;
m_bHasTradeActivated = true;
// The Trade (stored on Cron) has a copy of the Original Offer, with the User's signature on it.
// A copy of that original Trade object (itself with the user's signature) is already stored in
// the cron folder (by transaction number.) This happens when the Trade is FIRST added to cron,
// so it's already safe before we even get here.
//
// So thus I am FREE to release the signatures on the offer, and sign with the server instead.
// The server-signed offer will be stored by the OTMarket.
m_pOffer->ReleaseSignatures();
m_pOffer->SignContract(*(GetCron()->GetServerNym()));
m_pOffer->SaveContract();
pMarket->SaveMarket();
// Now when the market loads next time, it can verify this offer using the server's signature,
// instead of having to load the user. Because the server has verified it and added it, and now
// signs it, vouching for it.
// The Trade itself (all its other variables) are now allowed to change, since its signatures
// are also released and it is now server-signed. (With a copy stored of the original.)
m_pOffer->SetTrade(*this);
return m_pOffer;
}
}
else if(IsStopOrder() && !m_bHasStopActivated) // It's a stop order. Should we activate it now?
{
long lRelevantPrice = 0;
// If the stop order is trying to sell something, then it cares about the highest bidder.
if (pOffer->IsAsk())
lRelevantPrice = pMarket->GetHighestBidPrice();
else // But if the stop order is trying to buy something, then it cares about the lowest ask price.
lRelevantPrice = pMarket->GetLowestAskPrice();
// It's a stop order that hasn't activated yet. SHOULD IT ACTIVATE NOW?
if ((IsGreaterThan() && (lRelevantPrice > GetStopPrice())) ||
(IsLessThan() && (lRelevantPrice < GetStopPrice())))
{
// Activate the stop order!
if (!pMarket->AddOffer(*pOffer, true)) // Since we're actually adding an offer to the market (not just
{ // loading from disk) the we actually want to save the market. bSaveFile=true.
// Error adding the offer to the market!
OTLog::Error("Error adding the stop order to the market! (Even though supposedly the right market.)\n");
}
else
{
// SUCCESS!
m_pOffer = pOffer;
m_bHasStopActivated = true;
m_bHasTradeActivated = true;
// The Trade (stored on Cron) has a copy of the Original Offer, with the User's signature on it.
// A copy of that original Trade object (itself with the user's signature) is already stored in
// the cron folder (by transaction number.) This happens when the Trade is FIRST added to cron,
// so it's already safe before we even get here.
//
// So thus I am FREE to release the signatures on the offer, and sign with the server instead.
// The server-signed offer will be stored by the OTMarket.
m_pOffer->ReleaseSignatures();
m_pOffer->SignContract(*(GetCron()->GetServerNym()));
m_pOffer->SaveContract();
pMarket->SaveMarket();
// Now when the market loads next time, it can verify this offer using the server's signature,
// instead of having to load the user. Because the server has verified it and added it, and now
// signs it, vouching for it.
// The Trade itself (all its other variables) are now allowed to change, since its signatures
// are also released and it is now server-signed. (With a copy stored of the original.)
m_pOffer->SetTrade(*this);
return m_pOffer;
}
}
}
delete pOffer;
pOffer = NULL;
return NULL;
}