From 148b5b42a5a73118fc247c72d4ec070f5bacf0a5 Mon Sep 17 00:00:00 2001
From: JoelKatz <DavidJoelSchwartz@GMail.com>
Date: Tue, 16 Apr 2013 11:16:52 -0700
Subject: [PATCH] Transactor for change/fee.

---
 src/cpp/ripple/ChangeTransactor.cpp | 74 +++++++++++++++++++++++++++++
 src/cpp/ripple/ChangeTransactor.h   | 21 ++++++++
 2 files changed, 95 insertions(+)
 create mode 100644 src/cpp/ripple/ChangeTransactor.cpp
 create mode 100644 src/cpp/ripple/ChangeTransactor.h

diff --git a/src/cpp/ripple/ChangeTransactor.cpp b/src/cpp/ripple/ChangeTransactor.cpp
new file mode 100644
index 000000000..1d3a80f27
--- /dev/null
+++ b/src/cpp/ripple/ChangeTransactor.cpp
@@ -0,0 +1,74 @@
+#include "ChangeTransactor.h"
+
+TER ChangeTransactor::doApply()
+{
+	if (mTxn.getTxnType() == ttFEATURE)
+		return applyFeature();
+
+	if (mTxn.getTxnType() == ttFEE)
+		return applyFee();
+
+	return temUNKNOWN;
+}
+
+TER ChangeTransactor::checkSig()
+{
+	if (mTxn.getFieldAccount160(sfAccount).isNonZero())
+		return temBAD_SRC_ACCOUNT;
+
+	if (!mTxn.getSigningPubKey().empty() || !mTxn.getSignature().empty())
+		return temBAD_SIGNATURE;
+
+	return tesSUCCESS;
+}
+
+TER ChangeTransactor::checkSeq()
+{
+	if (mTxn.getSequence() != 0)
+		return temBAD_SEQUENCE;
+
+	return tesSUCCESS;
+}
+
+TER ChangeTransactor::payFee()
+{
+	if (mTxn.getTransactionFee() != STAmount())
+		return temBAD_FEE;
+
+	return tesSUCCESS;
+}
+
+TER ChangeTransactor::applyFeature()
+{
+	uint256 feature = mTxn.getFieldH256(sfFeature);
+
+	SLE::pointer featureObject = mEngine->entryCache(ltFEATURES, Ledger::getLedgerFeatureIndex());
+	if (!featureObject)
+		featureObject = mEngine->entryCreate(ltFEATURES, Ledger::getLedgerFeatureIndex());
+
+	STVector256 features = featureObject->getFieldV256(sfFeatures);
+	if (features.hasValue(feature))
+		return tefALREADY;
+	
+	features.addValue(feature);
+	featureObject->setFieldV256(sfFeatures, features);
+	mEngine->entryModify(featureObject);
+
+	return tesSUCCESS;
+}
+
+TER ChangeTransactor::applyFee()
+{
+
+	SLE::pointer feeObject = mEngine->entryCache(ltFEE_SETTINGS, Ledger::getLedgerFeeIndex());
+	if (!feeObject)
+		feeObject = mEngine->entryCreate(ltFEE_SETTINGS, Ledger::getLedgerFeeIndex());
+
+	feeObject->setFieldU64(sfBaseFee, mTxn.getFieldU64(sfBaseFee));
+	feeObject->setFieldU32(sfReferenceFeeUnits, mTxn.getFieldU32(sfReferenceFeeUnits));
+	feeObject->setFieldU32(sfReserveBase, mTxn.getFieldU32(sfReserveBase));
+	feeObject->setFieldU32(sfReserveIncrement, mTxn.getFieldU32(sfReserveIncrement));
+
+	mEngine->entryModify(feeObject);
+	return tesSUCCESS;
+}
diff --git a/src/cpp/ripple/ChangeTransactor.h b/src/cpp/ripple/ChangeTransactor.h
new file mode 100644
index 000000000..6c850d5fc
--- /dev/null
+++ b/src/cpp/ripple/ChangeTransactor.h
@@ -0,0 +1,21 @@
+#include "Transactor.h"
+
+class ChangeTransactor : public Transactor
+{
+protected:
+
+	TER applyFeature();
+	TER applyFee();
+
+public:
+	ChangeTransactor(const SerializedTransaction& txn, TransactionEngineParams params, TransactionEngine *engine)
+		: Transactor(txn, params, engine)
+	{ ; }
+
+	TER doApply();
+	TER checkSig();
+	TER checkSeq();
+	TER payFee();
+};
+
+// vim:ts=4