diff --git a/src/SerializedObject.h b/src/SerializedObject.h
index abc42c42c6..776821ac82 100644
--- a/src/SerializedObject.h
+++ b/src/SerializedObject.h
@@ -5,13 +5,17 @@
 
 #include "SerializedTypes.h"
 
+enum SOE_Type
+{
+	SOE_NEVER=-1, SOE_REQUIRED=0, SOE_FLAGS, SOE_IFFLAG=1, SOE_IFNFLAG=2
+};
+
 struct SOElement
 { // An element in the description of a serialized object
 	const char *e_name;
-	int e_flag;
 	SerializedTypeID e_id;
-
-	SOElement(const char *n, int f, SerializedTypeID i) : e_name(n), e_flag(f), e_id(i) { ; }
+	SOE_Type e_type;
+	int e_flags;
 };
 
 struct SOType
@@ -27,19 +31,18 @@ protected:
 	boost::ptr_vector<SerializedType> data;
 
 public:
-	STUObject() { ; }
-	virtual ~STUObject();
-
-	STUObject(const STUObject&);
-	STUObject& operator=(const STUObject&);
+	STUObject() : type(NULL) { ; }
+	STUObject(SOType *t) : type(t) { ; }
+	STUObject(SOType *t, SerializerIterator& u);
+	virtual ~STUObject() { ; }
 
 	int getLength() const;
 	SerializedTypeID getType() const { return STI_OBJECT; }
 	STUObject* duplicate() const { return new STUObject(*this); }
 
-	std::vector<unsigned char> serialize() const;
+	void add(Serializer& s) const;
+	std::string getFullText() const;
 	std::string getText() const;
-	std::string getSQL() const;
 
 	void addObject(const SerializedType& t) { data.push_back(t.duplicate()); }
 	void giveObject(SerializedType* t) { data.push_back(t); }
diff --git a/src/SerializedTypes.cpp b/src/SerializedTypes.cpp
new file mode 100644
index 0000000000..acdb2d1a28
--- /dev/null
+++ b/src/SerializedTypes.cpp
@@ -0,0 +1,174 @@
+
+#include <boost/lexical_cast.hpp>
+
+#include "SerializedTypes.h"
+#include "SerializedObject.h"
+
+std::string SerializedType::getFullText() const
+{
+	std::string ret;
+	if(getType()!=STI_NOTPRESENT)
+	{
+		if(name!=NULL)
+		{
+			ret=name;
+			ret+=" = ";
+		}
+		ret+=getText();
+	}
+	return ret;
+}
+
+STUInt8* STUInt8::construct(SerializerIterator& u)
+{
+	return new STUInt8(u.get8());
+}
+
+std::string STUInt8::getText() const
+{
+	return boost::lexical_cast<std::string>(value);
+}
+
+STUInt16* STUInt16::construct(SerializerIterator& u)
+{
+	return new STUInt16(u.get16());
+}
+
+std::string STUInt16::getText() const
+{
+	return boost::lexical_cast<std::string>(value);
+}
+
+STUInt32* STUInt32::construct(SerializerIterator& u)
+{
+	return new STUInt32(u.get32());
+}
+
+std::string STUInt32::getText() const
+{
+	return boost::lexical_cast<std::string>(value);
+}
+
+STUInt64* STUInt64::construct(SerializerIterator& u)
+{
+	return new STUInt64(u.get64());
+}
+
+std::string STUInt64::getText() const
+{
+	return boost::lexical_cast<std::string>(value);
+}
+
+STUHash160* STUHash160::construct(SerializerIterator& u)
+{
+	return new STUHash160(u.get160());
+}
+
+std::string STUHash160::getText() const
+{
+	return value.GetHex();
+}
+
+STUHash256* STUHash256::construct(SerializerIterator& u)
+{
+	return new STUHash256(u.get256());
+}
+
+std::string STUHash256::getText() const
+{
+	return value.GetHex();
+}
+
+static std::string hex(const std::vector<unsigned char>& value)
+{
+	int dlen=value.size(), i=0;
+	char psz[dlen*2 + 1];
+	for(std::vector<unsigned char>::const_iterator it=value.begin(), end=value.end(); it!=end; ++it)
+		sprintf(psz + 2*(i++), "%02X", *it);
+	return std::string(psz, psz + value.size()*2);
+}
+
+std::string STUVariableLength::getText() const
+{
+	return hex(value);
+}
+
+STUVariableLength* STUVariableLength::construct(SerializerIterator& u)
+{
+	return new STUVariableLength(u.getVL());
+}
+
+int STUVariableLength::getLength() const
+{
+	return Serializer::encodeLengthLength(value.size()) + value.size();
+}
+
+std::string STUTaggedList::getText() const
+{
+	std::string ret;
+	for(std::vector<TaggedListItem>::const_iterator it=value.begin(); it!=value.end(); ++it)
+	{
+		ret+=boost::lexical_cast<std::string>(it->first);
+		ret+=",";
+		ret+=hex(it->second);
+	}
+	return ret;
+}
+
+STUTaggedList* STUTaggedList::construct(SerializerIterator& u)
+{
+	return new STUTaggedList(u.getTaggedList());
+}
+
+int STUTaggedList::getLength() const
+{
+	int ret=Serializer::getTaggedListLength(value);
+	if(ret<0) throw(0);
+	return ret;
+}
+
+std::string STUObject::getFullText() const
+{
+	std::string ret;
+	if(name!=NULL)
+	{
+		ret=name;
+		ret+=" = {";
+	}
+	else ret="{";
+	for(boost::ptr_vector<SerializedType>::const_iterator it=data.begin(), end=data.end(); it!=end; ++it)
+		ret+=it->getFullText();
+	ret+="}";
+	return ret;
+}
+
+int STUObject::getLength() const
+{
+	int ret=0;
+	for(boost::ptr_vector<SerializedType>::const_iterator it=data.begin(), end=data.end(); it!=end; ++it)
+		ret+=it->getLength();
+	return ret;
+}
+
+void STUObject::add(Serializer& s) const
+{
+	for(boost::ptr_vector<SerializedType>::const_iterator it=data.begin(), end=data.end(); it!=end; ++it)
+		it->add(s);
+}
+
+std::string STUObject::getText() const
+{
+	std::string ret="{";
+	bool first=false;
+	for(boost::ptr_vector<SerializedType>::const_iterator it=data.begin(), end=data.end(); it!=end; ++it)
+	{
+		if(!first)
+		{
+			ret+=", ";
+			first=false;
+		}
+		ret+=it->getText();
+	}
+	ret+="}";
+	return ret;
+}
diff --git a/src/SerializedTypes.h b/src/SerializedTypes.h
index 1a454072f6..6c70c9b0a3 100644
--- a/src/SerializedTypes.h
+++ b/src/SerializedTypes.h
@@ -9,27 +9,34 @@
 
 enum SerializedTypeID
 {
-	STI_NOTPRESENT=0, STI_OBJECT=1,
-	STI_UINT8=2, STI_UINT16=3, STI_UINT32=4, STI_UINT64=5,
-	STI_HASH160=6, STI_HASH256=7, STI_VL=8, STI_TL=8
+	STI_DONE=-1, STI_NOTPRESENT=0,
+	STI_OBJECT=1, STI_UINT8=2, STI_UINT16=3, STI_UINT32=4, STI_UINT64=5,
+	STI_HASH160=6, STI_HASH256=7, STI_VL=8, STI_TL=8,
 };
 
 class SerializedType
 {
+protected:
+	const char *name;
+
 public:
 
-	SerializedType() { ; }
+	SerializedType() : name(NULL) { ; }
+	SerializedType(const char *n) : name(n) { ; }
 	virtual ~SerializedType() { ; }
 
+	void setName(const char *n) { name=n; }
+	const char *getName() { return name; }
+
 	virtual int getLength() const { return 0; }
 	virtual SerializedTypeID getType() const { return STI_NOTPRESENT; }
 	virtual SerializedType* duplicate() const { return new SerializedType(); }
 
-	virtual std::string getText() const { return std::string(); }
-	virtual std::string getSQL() const { return std::string(); }
+	virtual std::string getFullText() const;
+	virtual std::string getText() const // just the value
+	{ return std::string(); }
 
-	virtual std::vector<unsigned char> serialize() const;
-	virtual int add(std::vector<unsigned char>&) const { return 0; }
+	virtual void add(Serializer& s) const { return; }
 
 	SerializedType* new_clone(const SerializedType& s) { return s.duplicate(); }
 	void delete_clone(const SerializedType* s) { boost::checked_delete(s); }
@@ -43,14 +50,13 @@ protected:
 public:
 
 	STUInt8(unsigned char v=0) : value(v) { ; }
-	static STUInt8* construct(const std::vector<unsigned char>&, int start_offset, int& length_consumed);
+	static STUInt8* construct(SerializerIterator&);
 
 	int getLength() const { return 1; }
 	SerializedTypeID getType() const { return STI_UINT8; }
 	STUInt8 *duplicate() const { return new STUInt8(value); }
 	std::string getText() const;
-	std::string getSQL() const;
-	virtual int add(std::vector<unsigned char>&) const;
+	virtual void add(Serializer& s) const { s.add8(value); }
 
 	unsigned char getValue() const { return value; }
 	void setValue(unsigned char v) { value=v; }
@@ -67,14 +73,13 @@ protected:
 public:
 
 	STUInt16(uint16 v=0) : value(v) { ; }
-	static STUInt16* construct(const std::vector<unsigned char>&, int start_offset, int& length_consumed);
+	static STUInt16* construct(SerializerIterator&);
 
 	int getLength() const { return 2; }
 	SerializedTypeID getType() const { return STI_UINT16; }
 	STUInt16 *duplicate() const { return new STUInt16(value); }
 	std::string getText() const;
-	std::string getSQL() const;
-	virtual int add(std::vector<unsigned char>&) const;
+	virtual void add(Serializer& s) const { s.add16(value); }
 
 	uint16 getValue() const { return value; }
 	void setValue(uint16 v) { value=v; }
@@ -91,14 +96,13 @@ protected:
 public:
 
 	STUInt32(uint32 v=0) : value(v) { ; }
-	static STUInt32* construct(const std::vector<unsigned char>&, int start_offset, int& length_consumed);
+	static STUInt32* construct(SerializerIterator&);
 
 	int getLength() const { return 4; }
 	SerializedTypeID getType() const { return STI_UINT32; }
 	STUInt32 *duplicate() const { return new STUInt32(value); }
 	std::string getText() const;
-	std::string getSQL() const;
-	virtual int add(std::vector<unsigned char>&) const;
+	virtual void add(Serializer& s) const { s.add32(value); }
 
 	uint32 getValue() const { return value; }
 	void setValue(uint32 v) { value=v; }
@@ -115,14 +119,13 @@ protected:
 public:
 
 	STUInt64(uint64 v=0) : value(v) { ; }
-	static STUInt64* construct(const std::vector<unsigned char>&, int start_offset, int& length_consumed);
+	static STUInt64* construct(SerializerIterator&);
 
 	int getLength() const { return 8; }
 	SerializedTypeID getType() const { return STI_UINT64; }
 	STUInt64 *duplicate() const { return new STUInt64(value); }
 	std::string getText() const;
-	std::string getSQL() const;
-	virtual int add(std::vector<unsigned char>&) const;
+	virtual void add(Serializer& s) const { s.add64(value); }
 
 	uint64 getValue() const { return value; }
 	void setValue(uint64 v) { value=v; }
@@ -140,14 +143,13 @@ public:
 
 	STUHash160(const uint160& v) : value(v) { ; }
 	STUHash160() { ; }
-	static STUHash160* construct(const std::vector<unsigned char>&, int start_offset, int& length_consumed);
+	static STUHash160* construct(SerializerIterator&);
 
 	int getLength() const { return 20; }
 	SerializedTypeID getType() const { return STI_HASH160; }
 	STUHash160 *duplicate() const { return new STUHash160(value); }
 	std::string getText() const;
-	std::string getSQL() const;
-	virtual int add(std::vector<unsigned char>&) const;
+	virtual void add(Serializer& s) const { s.add160(value); }
 
 	const uint160& getValue() const { return value; }
 	void setValue(const uint160& v) { value=v; }
@@ -165,14 +167,13 @@ public:
 
 	STUHash256(const uint256& v) : value(v) { ; }
 	STUHash256() { ; }
-	static STUHash256* construct(const std::vector<unsigned char>&, int start_offset, int& length_consumed);
+	static STUHash256* construct(SerializerIterator&);
 
 	int getLength() const { return 32; }
 	SerializedTypeID getType() const { return STI_HASH256; }
 	STUHash256 *duplicate() const { return new STUHash256(value); }
 	std::string getText() const;
-	std::string getSQL() const;
-	virtual int add(std::vector<unsigned char>&) const;
+	virtual void add(Serializer& s) const { s.add256(value); }
 
 	const uint256& getValue() const { return value; }
 	void setValue(const uint256& v) { value=v; }
@@ -190,14 +191,13 @@ public:
 
 	STUVariableLength(const std::vector<unsigned char>& v) : value(v) { ; }
 	STUVariableLength() { ; }
-	static STUVariableLength* construct(const std::vector<unsigned char>&, int start_offset, int& length_consumed);
+	static STUVariableLength* construct(SerializerIterator&);
 
 	int getLength() const;
 	SerializedTypeID getType() const { return STI_VL; }
 	STUVariableLength *duplicate() const { return new STUVariableLength(value); }
 	std::string getText() const;
-	std::string getSQL() const;
-	virtual int add(std::vector<unsigned char>&) const;
+	virtual void add(Serializer& s) const { s.addVL(value); }
 
 	const std::vector<unsigned char>& peekValue() const { return value; }
 	std::vector<unsigned char>& peekValue() { return value; }
@@ -211,26 +211,25 @@ public:
 class STUTaggedList
 {
 protected:
-	std::list<TaggedListItem> value;
+	std::vector<TaggedListItem> value;
 
 public:
 
-	STUTaggedList(const std::list<TaggedListItem>& v) : value(v) { ; }
+	STUTaggedList(const std::vector<TaggedListItem>& v) : value(v) { ; }
 	STUTaggedList() { ; }
-	static STUTaggedList* construct(const std::vector<unsigned char>&, int start_offset, int& length_consumed);
+	static STUTaggedList* construct(SerializerIterator&);
 
 	int getLength() const;
 	SerializedTypeID getType() const { return STI_TL; }
 	STUTaggedList *duplicate() const { return new STUTaggedList(value); }
 	std::string getText() const;
-	std::string getSQL() const;
-	virtual int add(std::vector<unsigned char>&) const;
+	virtual void add(Serializer& s) const { if(s.addTaggedList(value)<0) throw(0); }
 
-	const std::list<TaggedListItem>& peekValue() const { return value; }
-	std::list<TaggedListItem>& peekValue() { return value; }
-	std::list<TaggedListItem> getValue() const { return value; }
+	const std::vector<TaggedListItem>& peekValue() const { return value; }
+	std::vector<TaggedListItem>& peekValue() { return value; }
+	std::vector<TaggedListItem> getValue() const { return value; }
 
-	void setValue(std::list<TaggedListItem>& v) { value=v; }
+	void setValue(std::vector<TaggedListItem>& v) { value=v; }
 
 	int getItemCount() const { return value.size(); }
 	bool isEmpty() const { return value.empty(); }
@@ -238,8 +237,8 @@ public:
 	void clear() { value.erase(value.begin(), value.end()); }
 	void addItem(const TaggedListItem& v) { value.push_back(v); }
 
-	operator std::list<TaggedListItem>() const { return value; }
-	STUTaggedList& operator=(const std::list<TaggedListItem>& v) { value=v; return *this; }
+	operator std::vector<TaggedListItem>() const { return value; }
+	STUTaggedList& operator=(const std::vector<TaggedListItem>& v) { value=v; return *this; }
 };
 
 #endif
diff --git a/src/Serializer.cpp b/src/Serializer.cpp
index 232c4060ea..24be5f05a5 100644
--- a/src/Serializer.cpp
+++ b/src/Serializer.cpp
@@ -264,6 +264,42 @@ int Serializer::addTaggedList(const std::list<TaggedListItem>& list)
 	return ret;
 }
 
+int Serializer::addTaggedList(const std::vector<TaggedListItem>& list)
+{
+	int size=list.size();
+	if(size>255) return -1;
+	int ret=add8(size);
+	if(size!=0)
+		for(std::vector<TaggedListItem>::const_iterator it=list.begin(); it!=list.end(); ++it)
+		{
+			add8(it->first);
+			addVL(it->second);
+		}
+	return ret;
+}
+
+int Serializer::getTaggedListLength(const std::list<TaggedListItem>& list)
+{
+	int size=list.size();
+	if(size>255) return -1;
+	int ret=1;
+	if(size!=0)
+		for(std::list<TaggedListItem>::const_iterator it=list.begin(); it!=list.end(); ++it)
+			ret+=1 + it->second.size() + Serializer::encodeLengthLength(it->second.size());
+	return ret;
+}
+
+int Serializer::getTaggedListLength(const std::vector<TaggedListItem>& list)
+{
+	int size=list.size();
+	if(size>255) return -1;
+	int ret=1;
+	if(size!=0)
+		for(std::vector<TaggedListItem>::const_iterator it=list.begin(); it!=list.end(); ++it)
+			ret+=1 + it->second.size() + Serializer::encodeLengthLength(it->second.size());
+	return ret;
+}
+
 bool Serializer::getVL(std::vector<unsigned char>& objectVL, int offset, int& length) const
 {
 	int b1;
@@ -348,6 +384,25 @@ bool Serializer::getTaggedList(std::list<TaggedListItem>& list, int offset, int&
 	return true;
 }
 
+bool Serializer::getTaggedList(std::vector<TaggedListItem>& list, int offset, int& length) const
+{
+	list.clear();
+	int startOffset=offset;
+	int numElem;
+	if(!get8(numElem, offset++)) return false;
+	for(int i=0; i<numElem; i++)
+	{
+		int tag, len;
+		std::vector<unsigned char> data;
+		if(!get8(tag, offset++)) return false;
+		if(!getVL(data, offset, len)) return false;
+		offset+=len;
+		list.push_back(std::make_pair(tag, data));
+	}
+	length=offset-startOffset;
+	return true;
+}
+
 std::vector<unsigned char> Serializer::encodeVL(int length) throw()
 {
 	unsigned char lenBytes[4];
@@ -374,7 +429,7 @@ std::vector<unsigned char> Serializer::encodeVL(int length) throw()
 	else throw(std::overflow_error("lenlen"));
 }
 
-int encodeLengthLength(int length) throw()
+int Serializer::encodeLengthLength(int length) throw()
 {
 	if(length<0) throw(std::overflow_error("len<0"));
 	if(length<=192) return 1;
@@ -480,10 +535,10 @@ std::vector<unsigned char> SerializerIterator::getVL() throw()
 	return vl;
 }
 
-std::list<TaggedListItem> SerializerIterator::getTaggedList() throw()
+std::vector<TaggedListItem> SerializerIterator::getTaggedList() throw()
 {
 	int length;
-	std::list<TaggedListItem> tl;
+	std::vector<TaggedListItem> tl;
 	if(!mSerializer.getTaggedList(tl, mPos, length)) throw(0);
 	mPos+=length;
 	return tl;
diff --git a/src/Serializer.h b/src/Serializer.h
index ce5a1174cc..8ed1ffd5a9 100644
--- a/src/Serializer.h
+++ b/src/Serializer.h
@@ -39,6 +39,9 @@ class Serializer
 	int addVL(const std::vector<unsigned char> &vector);
 	int addVL(const void *ptr, int len);
 	int addTaggedList(const std::list<TaggedListItem>&);
+	int addTaggedList(const std::vector<TaggedListItem>&);
+	static int getTaggedListLength(const std::list<TaggedListItem>&);
+	static int getTaggedListLength(const std::vector<TaggedListItem>&);
 
 	// disassemble functions
 	bool get8(int&, int offset) const;
@@ -54,7 +57,8 @@ class Serializer
 
 	bool getVL(std::vector<unsigned char>& objectVL, int offset, int& length) const;
 	bool getVLLength(int& length, int offset) const;
-	bool getTaggedList(std::list<TaggedListItem>&, int offset, int& legnth) const;
+	bool getTaggedList(std::list<TaggedListItem>&, int offset, int& length) const;
+	bool getTaggedList(std::vector<TaggedListItem>&, int offset, int& length) const;
 
 
 	// hash functions
@@ -84,7 +88,7 @@ class Serializer
 
 	// low-level VL length encode/decode functions
 	static std::vector<unsigned char> encodeVL(int length) throw();
-	static int encodeLengthLength(int length) throw();
+	static int encodeLengthLength(int length) throw(); // length to encode length
 	static int decodeLengthLength(int b1) throw();
 	static int decodeVLLength(int b1) throw();
 	static int decodeVLLength(int b1, int b2) throw();
@@ -117,7 +121,7 @@ public:
 	uint256 get256() throw();
 
 	std::vector<unsigned char> getVL() throw();
-	std::list<TaggedListItem> getTaggedList() throw();
+	std::vector<TaggedListItem> getTaggedList() throw();
 };
 
 #endif
diff --git a/src/TransactionFormats.h b/src/TransactionFormats.h
new file mode 100644
index 0000000000..3064178ad0
--- /dev/null
+++ b/src/TransactionFormats.h
@@ -0,0 +1,59 @@
+#ifndef __TRANSACTIONFORMATS__
+#define __TRANSACTIONFORMATS__
+
+#include "SerializedObject.h"
+
+#define STI_ACCOUNT STI_HASH160
+
+struct TransactionFormat
+{
+	const char *t_name;
+	int t_id;
+	SOElement elements[16];
+};
+
+TransactionFormat InnerTxnFormats[]=
+{
+	{ "MakePayment", 0, {
+		{ "Flags",        STI_UINT16,  SOE_FLAGS,    0 },
+		{ "Sequence", 	  STI_UINT32,  SOE_REQUIRED, 0 },
+		{ "Destination",  STI_ACCOUNT, SOE_REQUIRED, 0 },
+		{ "Amount",       STI_UINT64,  SOE_REQUIRED, 0 },
+		{ "Currency",     STI_HASH160, SOE_IFFLAG,   1 },
+		{ "SourceTag",    STI_UINT32,  SOE_IFFLAG,   2 },
+		{ "TargetLedger", STI_UINT32,  SOE_IFFLAG,   4 },
+		{ "InvoiceID",    STI_HASH256, SOE_IFFLAG,   8 },
+		{ "Extensions",   STI_TL,      SOE_IFFLAG,   32768 },
+		{ NULL,           STI_DONE,    SOE_NEVER,    -1 } }
+	},
+	{ "Invoice", 1, {
+		{ "Flags",        STI_UINT16,  SOE_FLAGS,    0 },
+		{ "Sequence",     STI_UINT32,  SOE_REQUIRED, 0 },
+		{ "Target",       STI_ACCOUNT, SOE_REQUIRED, 0 },
+		{ "Amount",       STI_UINT64,  SOE_REQUIRED, 0 },
+		{ "Currency",     STI_HASH160, SOE_IFFLAG,   1 },
+		{ "SourceTag",    STI_UINT32,  SOE_IFFLAG,   2 },
+		{ "Destination",  STI_ACCOUNT, SOE_IFFLAG,   4 },
+		{ "TargetLedger", STI_UINT32,  SOE_IFFLAG,   8 },
+		{ "Identifier",   STI_VL,      SOE_IFFLAG,   16 },
+		{ "Extensions",   STI_TL,      SOE_IFFLAG,   32768 },
+		{ NULL,           STI_DONE,    SOE_NEVER,    -1 } }
+	},
+	{ "Offer", 2, {
+		{ "Flags",        STI_UINT16,  SOE_FLAGS,    0 },
+		{ "Sequence",     STI_UINT32,  SOE_REQUIRED, 0 },
+		{ "AmountIn",     STI_UINT64,  SOE_REQUIRED, 0 },
+		{ "CurrencyIn",   STI_HASH160, SOE_IFFLAG,   2 },
+		{ "AmountOut",    STI_UINT64,  SOE_REQUIRED, 0 },
+		{ "CurrencyOut",  STI_HASH160, SOE_IFFLAG,   4 },
+		{ "SourceTag",    STI_UINT32,  SOE_IFFLAG,   8 },
+		{ "Destination",  STI_ACCOUNT, SOE_IFFLAG,   16 },
+		{ "TargetLedger", STI_UINT32,  SOE_IFFLAG,   32 },
+		{ "ExpireLedger", STI_UINT32,  SOE_IFFLAG,   64 },
+		{ "Identifier",   STI_VL,      SOE_IFFLAG,   128 },
+		{ "Extensions",   STI_TL,      SOE_IFFLAG,   32768 },
+		{ NULL,           STI_DONE,    SOE_NEVER,    -1 } }
+	}
+};
+
+#endif