std::pair<bool, Json::Value>
ripplePathFind(RippleLineCache::pointer const& cache,
RippleAddress const& raSrc, RippleAddress const& raDst,
STAmount const& saDstAmount, Ledger::pointer const& lpLedger,
Json::Value const& jvSrcCurrencies,
boost::optional<Json::Value> const& contextPaths, int const& level)
{
FindPaths fp(
cache,
raSrc.getAccountID(),
raDst.getAccountID(),
saDstAmount,
level,
4); // max paths
Json::Value jvArray(Json::arrayValue);
for (unsigned int i = 0; i != jvSrcCurrencies.size(); ++i)
{
Json::Value jvSource = jvSrcCurrencies[i];
Currency uSrcCurrencyID;
Account uSrcIssuerID;
if (!jvSource.isObject())
return std::make_pair(false, rpcError(rpcINVALID_PARAMS));
// Parse mandatory currency.
if (!jvSource.isMember(jss::currency)
|| !to_currency(
uSrcCurrencyID, jvSource[jss::currency].asString()))
{
WriteLog(lsINFO, RPCHandler) << "Bad currency.";
return std::make_pair(false, rpcError(rpcSRC_CUR_MALFORMED));
}
if (uSrcCurrencyID.isNonZero())
uSrcIssuerID = raSrc.getAccountID();
// Parse optional issuer.
if (jvSource.isMember(jss::issuer) &&
((!jvSource[jss::issuer].isString() ||
!to_issuer(uSrcIssuerID, jvSource[jss::issuer].asString())) ||
(uSrcIssuerID.isZero() != uSrcCurrencyID.isZero()) ||
(noAccount() == uSrcIssuerID)))
{
WriteLog(lsINFO, RPCHandler) << "Bad issuer.";
return std::make_pair(false, rpcError(rpcSRC_ISR_MALFORMED));
}
STPathSet spsComputed;
if (contextPaths)
{
Json::Value pathSet = Json::objectValue;
pathSet[jss::Paths] = contextPaths.get();
STParsedJSONObject paths("pathSet", pathSet);
if (paths.object.get() == nullptr)
return std::make_pair(false, paths.error);
else
{
spsComputed = paths.object.get()->getFieldPathSet(sfPaths);
WriteLog(lsTRACE, RPCHandler) << "ripple_path_find: Paths: " <<
spsComputed.getJson(0);
}
}
STPath fullLiquidityPath;
auto valid = fp.findPathsForIssue(
{ uSrcCurrencyID, uSrcIssuerID },
spsComputed,
fullLiquidityPath);
if (!valid)
{
WriteLog(lsWARNING, RPCHandler)
<< "ripple_path_find: No paths found.";
}
else
{
auto& issuer =
isXRP(uSrcIssuerID) ?
isXRP(uSrcCurrencyID) ? // Default to source account.
xrpAccount() :
Account(raSrc.getAccountID())
: uSrcIssuerID; // Use specifed issuer.
STAmount saMaxAmount({ uSrcCurrencyID, issuer }, 1);
saMaxAmount.negate();
LedgerEntrySet lesSandbox(lpLedger, tapNONE);
auto rc = path::RippleCalc::rippleCalculate(
lesSandbox,
saMaxAmount, // --> Amount to send is unlimited
// to get an estimate.
saDstAmount, // --> Amount to deliver.
raDst.getAccountID(), // --> Account to deliver to.
raSrc.getAccountID(), // --> Account sending from.
spsComputed); // --> Path set.
WriteLog(lsWARNING, RPCHandler)
<< "ripple_path_find:"
<< " saMaxAmount=" << saMaxAmount
<< " saDstAmount=" << saDstAmount
<< " saMaxAmountAct=" << rc.actualAmountIn
<< " saDstAmountAct=" << rc.actualAmountOut;
if (fullLiquidityPath.size() > 0 &&
(rc.result() == terNO_LINE || rc.result() == tecPATH_PARTIAL))
{
WriteLog(lsDEBUG, PathRequest)
<< "Trying with an extra path element";
spsComputed.push_back(fullLiquidityPath);
lesSandbox.clear();
rc = path::RippleCalc::rippleCalculate(
lesSandbox,
saMaxAmount, // --> Amount to send is unlimited
// to get an estimate.
saDstAmount, // --> Amount to deliver.
raDst.getAccountID(), // --> Account to deliver to.
raSrc.getAccountID(), // --> Account sending from.
spsComputed); // --> Path set.
WriteLog(lsDEBUG, PathRequest)
<< "Extra path element gives "
<< transHuman(rc.result());
}
if (rc.result() == tesSUCCESS)
{
Json::Value jvEntry(Json::objectValue);
STPathSet spsCanonical;
// Reuse the expanded as it would need to be calcuated
// anyway to produce the canonical. (At least unless we
// make a direct canonical.)
jvEntry[jss::source_amount] = rc.actualAmountIn.getJson(0);
jvEntry[jss::paths_canonical] = Json::arrayValue;
jvEntry[jss::paths_computed] = spsComputed.getJson(0);
jvArray.append(jvEntry);
}
else
{
std::string strToken;
std::string strHuman;
transResultInfo(rc.result(), strToken, strHuman);
WriteLog(lsDEBUG, RPCHandler)
<< "ripple_path_find: "
<< strToken << " "
<< strHuman << " "
<< spsComputed.getJson(0);
}
}
}
return std::make_pair(true, jvArray);
}
// This interface is deprecated.
Json::Value doRipplePathFind (RPC::Context& context)
{
RPC::LegacyPathFind lpf (context.role == Role::ADMIN);
if (!lpf.isOk ())
return rpcError (rpcTOO_BUSY);
context.loadType = Resource::feeHighBurdenRPC;
RippleAddress raSrc;
RippleAddress raDst;
STAmount saDstAmount;
Ledger::pointer lpLedger;
Json::Value jvResult;
if (getConfig().RUN_STANDALONE ||
context.params.isMember(jss::ledger) ||
context.params.isMember(jss::ledger_index) ||
context.params.isMember(jss::ledger_hash))
{
// The caller specified a ledger
jvResult = RPC::lookupLedger (
context.params, lpLedger, context.netOps);
if (!lpLedger)
return jvResult;
}
if (!context.params.isMember ("source_account"))
{
jvResult = rpcError (rpcSRC_ACT_MISSING);
}
else if (!context.params["source_account"].isString ()
|| !raSrc.setAccountID (
context.params["source_account"].asString ()))
{
jvResult = rpcError (rpcSRC_ACT_MALFORMED);
}
else if (!context.params.isMember ("destination_account"))
{
jvResult = rpcError (rpcDST_ACT_MISSING);
}
else if (!context.params["destination_account"].isString ()
|| !raDst.setAccountID (
context.params["destination_account"].asString ()))
{
jvResult = rpcError (rpcDST_ACT_MALFORMED);
}
else if (
// Parse saDstAmount.
!context.params.isMember ("destination_amount")
|| ! amountFromJsonNoThrow(saDstAmount, context.params["destination_amount"])
|| saDstAmount <= zero
|| (!isXRP(saDstAmount.getCurrency ())
&& (!saDstAmount.getIssuer () ||
noAccount() == saDstAmount.getIssuer ())))
{
WriteLog (lsINFO, RPCHandler) << "Bad destination_amount.";
jvResult = rpcError (rpcINVALID_PARAMS);
}
else if (
// Checks on source_currencies.
context.params.isMember ("source_currencies")
&& (!context.params["source_currencies"].isArray ()
|| !context.params["source_currencies"].size ())
// Don't allow empty currencies.
)
{
WriteLog (lsINFO, RPCHandler) << "Bad source_currencies.";
jvResult = rpcError (rpcINVALID_PARAMS);
}
else
{
context.loadType = Resource::feeHighBurdenRPC;
RippleLineCache::pointer cache;
if (lpLedger)
{
// The caller specified a ledger
lpLedger = std::make_shared<Ledger> (std::ref (*lpLedger), false);
cache = std::make_shared<RippleLineCache>(lpLedger);
}
else
{
// The closed ledger is recent and any nodes made resident
// have the best chance to persist
lpLedger = context.netOps.getClosedLedger();
cache = getApp().getPathRequests().getLineCache(lpLedger, false);
}
Json::Value jvSrcCurrencies;
if (context.params.isMember ("source_currencies"))
{
jvSrcCurrencies = context.params["source_currencies"];
}
else
{
auto currencies = accountSourceCurrencies (raSrc, cache, true);
jvSrcCurrencies = Json::Value (Json::arrayValue);
for (auto const& uCurrency: currencies)
{
Json::Value jvCurrency (Json::objectValue);
jvCurrency["currency"] = to_string(uCurrency);
jvSrcCurrencies.append (jvCurrency);
}
}
// Fill in currencies destination will accept
Json::Value jvDestCur (Json::arrayValue);
// TODO(tom): this could be optimized the same way that
// PathRequest::doUpdate() is - if we don't obsolete this code first.
auto usDestCurrID = accountDestCurrencies (raDst, cache, true);
for (auto const& uCurrency: usDestCurrID)
jvDestCur.append (to_string (uCurrency));
jvResult["destination_currencies"] = jvDestCur;
jvResult["destination_account"] = raDst.humanAccountID ();
Json::Value jvArray (Json::arrayValue);
int level = getConfig().PATH_SEARCH_OLD;
if ((getConfig().PATH_SEARCH_MAX > level)
&& !getApp().getFeeTrack().isLoadedLocal())
{
++level;
}
if (context.params.isMember("search_depth")
&& context.params["search_depth"].isIntegral())
{
int rLev = context.params["search_depth"].asInt ();
if ((rLev < level) || (context.role == Role::ADMIN))
level = rLev;
}
FindPaths fp (
cache,
raSrc.getAccountID(),
raDst.getAccountID(),
saDstAmount,
level,
4); // max paths
for (unsigned int i = 0; i != jvSrcCurrencies.size (); ++i)
{
Json::Value jvSource = jvSrcCurrencies[i];
Currency uSrcCurrencyID;
Account uSrcIssuerID;
if (!jvSource.isObject ())
return rpcError (rpcINVALID_PARAMS);
// Parse mandatory currency.
if (!jvSource.isMember ("currency")
|| !to_currency (
uSrcCurrencyID, jvSource["currency"].asString ()))
{
WriteLog (lsINFO, RPCHandler) << "Bad currency.";
return rpcError (rpcSRC_CUR_MALFORMED);
}
if (uSrcCurrencyID.isNonZero ())
uSrcIssuerID = raSrc.getAccountID ();
// Parse optional issuer.
if (jvSource.isMember ("issuer") &&
((!jvSource["issuer"].isString () ||
!to_issuer (uSrcIssuerID, jvSource["issuer"].asString ())) ||
(uSrcIssuerID.isZero () != uSrcCurrencyID.isZero ()) ||
(noAccount() == uSrcIssuerID)))
{
WriteLog (lsINFO, RPCHandler) << "Bad issuer.";
return rpcError (rpcSRC_ISR_MALFORMED);
}
STPathSet spsComputed;
if (context.params.isMember("paths"))
{
Json::Value pathSet = Json::objectValue;
pathSet["Paths"] = context.params["paths"];
STParsedJSONObject paths ("pathSet", pathSet);
if (paths.object.get() == nullptr)
return paths.error;
else
{
spsComputed = paths.object.get()->getFieldPathSet (sfPaths);
WriteLog (lsTRACE, RPCHandler) << "ripple_path_find: Paths: " << spsComputed.getJson (0);
}
}
STPath fullLiquidityPath;
auto valid = fp.findPathsForIssue (
{uSrcCurrencyID, uSrcIssuerID},
spsComputed,
fullLiquidityPath);
if (!valid)
{
WriteLog (lsWARNING, RPCHandler)
<< "ripple_path_find: No paths found.";
}
else
{
auto& issuer =
isXRP (uSrcIssuerID) ?
isXRP (uSrcCurrencyID) ? // Default to source account.
xrpAccount() :
Account (raSrc.getAccountID ())
: uSrcIssuerID; // Use specifed issuer.
STAmount saMaxAmount ({uSrcCurrencyID, issuer}, 1);
saMaxAmount.negate ();
LedgerEntrySet lesSandbox (lpLedger, tapNONE);
auto rc = path::RippleCalc::rippleCalculate (
lesSandbox,
saMaxAmount, // --> Amount to send is unlimited
// to get an estimate.
saDstAmount, // --> Amount to deliver.
raDst.getAccountID (), // --> Account to deliver to.
raSrc.getAccountID (), // --> Account sending from.
spsComputed); // --> Path set.
WriteLog (lsWARNING, RPCHandler)
<< "ripple_path_find:"
<< " saMaxAmount=" << saMaxAmount
<< " saDstAmount=" << saDstAmount
<< " saMaxAmountAct=" << rc.actualAmountIn
<< " saDstAmountAct=" << rc.actualAmountOut;
if (fullLiquidityPath.size() > 0 &&
(rc.result() == terNO_LINE || rc.result() == tecPATH_PARTIAL))
{
WriteLog (lsDEBUG, PathRequest)
<< "Trying with an extra path element";
spsComputed.push_back (fullLiquidityPath);
lesSandbox.clear ();
rc = path::RippleCalc::rippleCalculate (
lesSandbox,
saMaxAmount, // --> Amount to send is unlimited
// to get an estimate.
saDstAmount, // --> Amount to deliver.
raDst.getAccountID (), // --> Account to deliver to.
raSrc.getAccountID (), // --> Account sending from.
spsComputed); // --> Path set.
WriteLog (lsDEBUG, PathRequest)
<< "Extra path element gives "
<< transHuman (rc.result ());
}
if (rc.result () == tesSUCCESS)
{
Json::Value jvEntry (Json::objectValue);
STPathSet spsCanonical;
// Reuse the expanded as it would need to be calcuated
// anyway to produce the canonical. (At least unless we
// make a direct canonical.)
jvEntry["source_amount"] = rc.actualAmountIn.getJson (0);
jvEntry["paths_canonical"] = Json::arrayValue;
jvEntry["paths_computed"] = spsComputed.getJson (0);
jvArray.append (jvEntry);
}
else
{
std::string strToken;
std::string strHuman;
transResultInfo (rc.result (), strToken, strHuman);
WriteLog (lsDEBUG, RPCHandler)
<< "ripple_path_find: "
<< strToken << " "
<< strHuman << " "
<< spsComputed.getJson (0);
}
}
}
// Each alternative differs by source currency.
jvResult["alternatives"] = jvArray;
}
WriteLog (lsDEBUG, RPCHandler)
<< boost::str (boost::format ("ripple_path_find< %s")
% jvResult);
return jvResult;
}
int PathRequest::parseJson (Json::Value const& jvParams, bool complete)
{
int ret = PFR_PJ_NOCHANGE;
if (jvParams.isMember (jss::source_account))
{
raSrcAccount = parseBase58<AccountID>(
jvParams[jss::source_account].asString());
if (! raSrcAccount)
{
jvStatus = rpcError (rpcSRC_ACT_MALFORMED);
return PFR_PJ_INVALID;
}
}
else if (complete)
{
jvStatus = rpcError (rpcSRC_ACT_MISSING);
return PFR_PJ_INVALID;
}
if (jvParams.isMember (jss::destination_account))
{
raDstAccount = parseBase58<AccountID>(
jvParams[jss::destination_account].asString());
if (! raDstAccount)
{
jvStatus = rpcError (rpcDST_ACT_MALFORMED);
return PFR_PJ_INVALID;
}
}
else if (complete)
{
jvStatus = rpcError (rpcDST_ACT_MISSING);
return PFR_PJ_INVALID;
}
if (jvParams.isMember (jss::destination_amount))
{
if (! amountFromJsonNoThrow (
saDstAmount, jvParams[jss::destination_amount]) ||
(saDstAmount.getCurrency ().isZero () &&
saDstAmount.getIssuer ().isNonZero ()) ||
(saDstAmount.getCurrency () == badCurrency ()) ||
saDstAmount <= zero)
{
jvStatus = rpcError (rpcDST_AMT_MALFORMED);
return PFR_PJ_INVALID;
}
}
else if (complete)
{
jvStatus = rpcError (rpcDST_ACT_MISSING);
return PFR_PJ_INVALID;
}
if (jvParams.isMember (jss::source_currencies))
{
Json::Value const& jvSrcCur = jvParams[jss::source_currencies];
if (!jvSrcCur.isArray ())
{
jvStatus = rpcError (rpcSRC_CUR_MALFORMED);
return PFR_PJ_INVALID;
}
sciSourceCurrencies.clear ();
for (unsigned i = 0; i < jvSrcCur.size (); ++i)
{
Json::Value const& jvCur = jvSrcCur[i];
Currency uCur;
AccountID uIss;
if (!jvCur.isObject() || !jvCur.isMember (jss::currency) ||
!to_currency (uCur, jvCur[jss::currency].asString ()))
{
jvStatus = rpcError (rpcSRC_CUR_MALFORMED);
return PFR_PJ_INVALID;
}
if (jvCur.isMember (jss::issuer) &&
!to_issuer (uIss, jvCur[jss::issuer].asString ()))
{
jvStatus = rpcError (rpcSRC_ISR_MALFORMED);
}
if (uCur.isZero () && uIss.isNonZero ())
{
jvStatus = rpcError (rpcSRC_CUR_MALFORMED);
return PFR_PJ_INVALID;
}
if (uCur.isNonZero() && uIss.isZero())
{
uIss = *raSrcAccount;
}
sciSourceCurrencies.insert ({uCur, uIss});
}
}
if (jvParams.isMember ("id"))
jvId = jvParams["id"];
return ret;
}