diff --git a/src/univalue/.gitignore b/src/univalue/.gitignore
new file mode 100644
index 000000000..ca9e84234
--- /dev/null
+++ b/src/univalue/.gitignore
@@ -0,0 +1,22 @@
+.deps/
+INSTALL
+Makefile
+Makefile.in
+aclocal.m4
+autom4te.cache/
+compile
+config.log
+config.status
+config.guess
+config.sub
+configure
+depcomp
+install-sh
+missing
+stamp-h1
+univalue-config.h*
+test-driver
+libtool
+ltmain.sh
+
+*.o
diff --git a/src/univalue/.travis.yml b/src/univalue/.travis.yml
new file mode 100644
index 000000000..af632c78d
--- /dev/null
+++ b/src/univalue/.travis.yml
@@ -0,0 +1,52 @@
+
+language: cpp
+
+compiler:
+  - clang
+  - gcc
+
+os:
+  - linux
+  - osx
+
+sudo: false
+
+env:
+  global:
+    - MAKEJOBS=-j3
+    - RUN_TESTS=true
+    - BASE_OUTDIR=$TRAVIS_BUILD_DIR/out
+
+cache:
+  apt: true
+
+addons:
+  apt:
+    packages:
+      - pkg-config
+
+before_script:
+  - if [ -n "$USE_SHELL" ]; then export CONFIG_SHELL="$USE_SHELL"; fi
+  - test -n "$USE_SHELL" && eval '"$USE_SHELL" -c "./autogen.sh"' || ./autogen.sh
+
+script:
+  - if [ -n "$UNIVALUE_CONFIG" ]; then unset CC; unset CXX; fi
+  - OUTDIR=$BASE_OUTDIR/$TRAVIS_PULL_REQUEST/$TRAVIS_JOB_NUMBER-$HOST
+  - UNIVALUE_CONFIG_ALL="--prefix=$TRAVIS_BUILD_DIR/depends/$HOST --bindir=$OUTDIR/bin --libdir=$OUTDIR/lib"
+  - ./configure --cache-file=config.cache $UNIVALUE_CONFIG_ALL $UNIVALUE_CONFIG || ( cat config.log && false)
+  - make -s $MAKEJOBS $GOAL || ( echo "Build failure. Verbose build follows." && make $GOAL ; false )
+  - export LD_LIBRARY_PATH=$TRAVIS_BUILD_DIR/depends/$HOST/lib
+  - if [ "$RUN_TESTS" = "true" ]; then make check; fi
+
+matrix:
+  fast_finish: true
+  include:
+    - os: linux
+      compiler: gcc
+      env: UNIVALUE_CONFIG=--host=x86_64-w64-mingw32 RUN_TESTS=false
+      addons:
+        apt:
+          packages:
+            - g++-mingw-w64-x86-64
+            - gcc-mingw-w64-x86-64
+            - binutils-mingw-w64-x86-64
diff --git a/src/univalue/COPYING b/src/univalue/COPYING
new file mode 100644
index 000000000..1fb429f35
--- /dev/null
+++ b/src/univalue/COPYING
@@ -0,0 +1,19 @@
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
diff --git a/src/univalue/Makefile.am b/src/univalue/Makefile.am
new file mode 100644
index 000000000..2800f466d
--- /dev/null
+++ b/src/univalue/Makefile.am
@@ -0,0 +1,84 @@
+ACLOCAL_AMFLAGS = -I build-aux/m4
+.PHONY: gen
+.INTERMEDIATE: $(GENBIN)
+
+include_HEADERS = include/univalue.h
+noinst_HEADERS = lib/univalue_escapes.h
+
+lib_LTLIBRARIES = lib/libunivalue.la
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = pc/libunivalue.pc
+
+lib_libunivalue_la_SOURCES = \
+	lib/univalue.cpp \
+	lib/univalue_read.cpp \
+	lib/univalue_write.cpp
+
+lib_libunivalue_la_LDFLAGS = \
+	-version-info $(LIBUNIVALUE_CURRENT):$(LIBUNIVALUE_REVISION):$(LIBUNIVALUE_AGE) \
+	-no-undefined
+lib_libunivalue_la_CXXFLAGS = -I$(top_srcdir)/include
+
+TESTS = test/unitester
+
+GENBIN = gen/gen$(BUILD_EXEEXT)
+GEN_SRCS = gen/gen.cpp
+
+$(GENBIN): $(GEN_SRCS)
+	@echo Building $@
+	$(AM_V_at)c++ -I$(top_srcdir)/include -o $@ $<
+
+gen: lib/univalue_escapes.h $(GENBIN)
+	@echo Updating $<
+	$(AM_V_at)$(GENBIN) > lib/univalue_escapes.h
+
+noinst_PROGRAMS = $(TESTS)
+
+TEST_DATA_DIR=test
+
+test_unitester_SOURCES = test/unitester.cpp
+test_unitester_LDADD = lib/libunivalue.la
+test_unitester_CXXFLAGS = -I$(top_srcdir)/include -DJSON_TEST_SRC=\"$(srcdir)/$(TEST_DATA_DIR)\"
+test_unitester_LDFLAGS = -static $(LIBTOOL_APP_LDFLAGS)
+
+TEST_FILES = \
+	$(TEST_DATA_DIR)/fail10.json \
+	$(TEST_DATA_DIR)/fail11.json \
+	$(TEST_DATA_DIR)/fail12.json \
+	$(TEST_DATA_DIR)/fail13.json \
+	$(TEST_DATA_DIR)/fail14.json \
+	$(TEST_DATA_DIR)/fail15.json \
+	$(TEST_DATA_DIR)/fail16.json \
+	$(TEST_DATA_DIR)/fail17.json \
+	$(TEST_DATA_DIR)/fail18.json \
+	$(TEST_DATA_DIR)/fail19.json \
+	$(TEST_DATA_DIR)/fail1.json \
+	$(TEST_DATA_DIR)/fail20.json \
+	$(TEST_DATA_DIR)/fail21.json \
+	$(TEST_DATA_DIR)/fail22.json \
+	$(TEST_DATA_DIR)/fail23.json \
+	$(TEST_DATA_DIR)/fail24.json \
+	$(TEST_DATA_DIR)/fail25.json \
+	$(TEST_DATA_DIR)/fail26.json \
+	$(TEST_DATA_DIR)/fail27.json \
+	$(TEST_DATA_DIR)/fail28.json \
+	$(TEST_DATA_DIR)/fail29.json \
+	$(TEST_DATA_DIR)/fail2.json \
+	$(TEST_DATA_DIR)/fail30.json \
+	$(TEST_DATA_DIR)/fail31.json \
+	$(TEST_DATA_DIR)/fail32.json \
+	$(TEST_DATA_DIR)/fail33.json \
+	$(TEST_DATA_DIR)/fail34.json \
+	$(TEST_DATA_DIR)/fail3.json \
+	$(TEST_DATA_DIR)/fail4.json \
+	$(TEST_DATA_DIR)/fail5.json \
+	$(TEST_DATA_DIR)/fail6.json \
+	$(TEST_DATA_DIR)/fail7.json \
+	$(TEST_DATA_DIR)/fail8.json \
+	$(TEST_DATA_DIR)/fail9.json \
+	$(TEST_DATA_DIR)/pass1.json \
+	$(TEST_DATA_DIR)/pass2.json \
+	$(TEST_DATA_DIR)/pass3.json
+
+EXTRA_DIST=$(TEST_FILES) $(GEN_SRCS)
diff --git a/src/univalue/README b/src/univalue/README
new file mode 100644
index 000000000..48167b083
--- /dev/null
+++ b/src/univalue/README
@@ -0,0 +1,7 @@
+
+		UniValue
+
+A universal value object, with JSON encoding (output) and decoding (input).
+
+Built as a single dynamic RAII C++ object class, and no templates.
+
diff --git a/src/univalue/TODO b/src/univalue/TODO
new file mode 100644
index 000000000..5530048e9
--- /dev/null
+++ b/src/univalue/TODO
@@ -0,0 +1,10 @@
+
+Rearrange tree for easier 'git subtree' style use
+
+Move towards C++11 etc.
+
+Namespace support - must come up with useful shorthand, avoiding
+long Univalue::Univalue::Univalue usages forced upon library users.
+
+Improve test suite
+
diff --git a/src/univalue/autogen.sh b/src/univalue/autogen.sh
new file mode 100755
index 000000000..4b38721fa
--- /dev/null
+++ b/src/univalue/autogen.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+set -e
+srcdir="$(dirname $0)"
+cd "$srcdir"
+if [ -z ${LIBTOOLIZE} ] && GLIBTOOLIZE="`which glibtoolize 2>/dev/null`"; then
+  LIBTOOLIZE="${GLIBTOOLIZE}"
+  export LIBTOOLIZE
+fi
+autoreconf --install --force
diff --git a/src/univalue/build-aux/m4/.empty b/src/univalue/build-aux/m4/.empty
new file mode 100644
index 000000000..e69de29bb
diff --git a/src/univalue/configure.ac b/src/univalue/configure.ac
new file mode 100644
index 000000000..6cd951622
--- /dev/null
+++ b/src/univalue/configure.ac
@@ -0,0 +1,69 @@
+m4_define([libunivalue_major_version], [1])
+m4_define([libunivalue_minor_version], [1])
+m4_define([libunivalue_micro_version], [1])
+m4_define([libunivalue_interface_age], [1])
+# If you need a modifier for the version number. 
+# Normally empty, but can be used to make "fixup" releases.
+m4_define([libunivalue_extraversion], [])
+
+dnl libtool versioning from libunivalue
+m4_define([libunivalue_current], [m4_eval(100 * libunivalue_minor_version + libunivalue_micro_version - libunivalue_interface_age)])
+m4_define([libunivalue_binary_age], [m4_eval(100 * libunivalue_minor_version + libunivalue_micro_version)])
+m4_define([libunivalue_revision], [libunivalue_interface_age])
+m4_define([libunivalue_age], [m4_eval(libunivalue_binary_age - libunivalue_interface_age)])
+m4_define([libunivalue_version], [libunivalue_major_version().libunivalue_minor_version().libunivalue_micro_version()libunivalue_extraversion()])
+
+
+AC_INIT([univalue], [1.0.0],
+        [http://github.com/jgarzik/univalue/])
+
+dnl make the compilation flags quiet unless V=1 is used
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
+AC_PREREQ(2.60)
+AC_CONFIG_SRCDIR([lib/univalue.cpp])
+AC_CONFIG_AUX_DIR([build-aux])
+AC_CONFIG_MACRO_DIR([build-aux/m4])
+AC_CONFIG_HEADERS([univalue-config.h])
+AM_INIT_AUTOMAKE([subdir-objects foreign])
+
+LIBUNIVALUE_MAJOR_VERSION=libunivalue_major_version
+LIBUNIVALUE_MINOR_VERSION=libunivalue_minor_version
+LIBUNIVALUE_MICRO_VERSION=libunivalue_micro_version
+LIBUNIVALUE_INTERFACE_AGE=libunivalue_interface_age
+
+# ABI version
+# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
+LIBUNIVALUE_CURRENT=libunivalue_current
+LIBUNIVALUE_REVISION=libunivalue_revision
+LIBUNIVALUE_AGE=libunivalue_age
+
+AC_SUBST(LIBUNIVALUE_CURRENT)
+AC_SUBST(LIBUNIVALUE_REVISION)
+AC_SUBST(LIBUNIVALUE_AGE)
+
+LT_INIT
+LT_LANG([C++])
+
+case $host in
+  *mingw*)
+    LIBTOOL_APP_LDFLAGS="$LIBTOOL_APP_LDFLAGS -all-static"
+  ;;
+esac
+
+BUILD_EXEEXT=
+case $build in
+  *mingw*)
+    BUILD_EXEEXT=".exe"
+  ;;
+esac
+
+AC_CONFIG_FILES([
+    Makefile
+    pc/libunivalue.pc
+    pc/libunivalue-uninstalled.pc])
+
+AC_SUBST(LIBTOOL_APP_LDFLAGS)
+AC_SUBST(BUILD_EXEEXT)
+AC_OUTPUT
+
diff --git a/src/univalue/gen/gen.cpp b/src/univalue/gen/gen.cpp
new file mode 100644
index 000000000..5e5a4d4ae
--- /dev/null
+++ b/src/univalue/gen/gen.cpp
@@ -0,0 +1,77 @@
+// Copyright 2014 BitPay Inc.
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+//
+// To re-create univalue_escapes.h:
+// $ g++ -o gen gen.cpp
+// $ ./gen > univalue_escapes.h
+//
+
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+#include "univalue.h"
+
+using namespace std;
+
+static bool initEscapes;
+static const char *escapes[256];
+
+static void initJsonEscape()
+{
+    escapes[(int)'"'] = "\\\"";
+    escapes[(int)'\\'] = "\\\\";
+    escapes[(int)'\b'] = "\\b";
+    escapes[(int)'\f'] = "\\f";
+    escapes[(int)'\n'] = "\\n";
+    escapes[(int)'\r'] = "\\r";
+    escapes[(int)'\t'] = "\\t";
+
+    initEscapes = true;
+}
+
+static void outputEscape()
+{
+	printf(	"// Automatically generated file. Do not modify.\n"
+		"#ifndef BITCOIN_UNIVALUE_UNIVALUE_ESCAPES_H\n"
+		"#define BITCOIN_UNIVALUE_UNIVALUE_ESCAPES_H\n"
+		"static const char *escapes[256] = {\n");
+
+	for (unsigned int i = 0; i < 256; i++) {
+		if (!escapes[i]) {
+			printf("\tNULL,\n");
+		} else {
+			printf("\t\"");
+
+			unsigned int si;
+			for (si = 0; si < strlen(escapes[i]); si++) {
+				char ch = escapes[i][si];
+				switch (ch) {
+				case '"':
+					printf("\\\"");
+					break;
+				case '\\':
+					printf("\\\\");
+					break;
+				default:
+					printf("%c", escapes[i][si]);
+					break;
+				}
+			}
+
+			printf("\",\n");
+		}
+	}
+
+	printf(	"};\n"
+		"#endif // BITCOIN_UNIVALUE_UNIVALUE_ESCAPES_H\n");
+}
+
+int main (int argc, char *argv[])
+{
+	initJsonEscape();
+	outputEscape();
+	return 0;
+}
+
diff --git a/src/univalue/include/univalue.h b/src/univalue/include/univalue.h
new file mode 100644
index 000000000..ac0511601
--- /dev/null
+++ b/src/univalue/include/univalue.h
@@ -0,0 +1,250 @@
+// Copyright 2014 BitPay Inc.
+// Copyright 2015 Bitcoin Core Developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef __UNIVALUE_H__
+#define __UNIVALUE_H__
+
+#include <stdint.h>
+
+#include <string>
+#include <vector>
+#include <map>
+#include <cassert>
+
+#include <sstream>        // .get_int64()
+#include <utility>        // std::pair
+
+class UniValue {
+public:
+    enum VType { VNULL, VOBJ, VARR, VSTR, VNUM, VBOOL, };
+
+    UniValue() { typ = VNULL; }
+    UniValue(UniValue::VType initialType, const std::string& initialStr = "") {
+        typ = initialType;
+        val = initialStr;
+    }
+    UniValue(uint64_t val_) {
+        setInt(val_);
+    }
+    UniValue(int64_t val_) {
+        setInt(val_);
+    }
+    UniValue(bool val_) {
+        setBool(val_);
+    }
+    UniValue(int val_) {
+        setInt(val_);
+    }
+    UniValue(double val_) {
+        setFloat(val_);
+    }
+    UniValue(const std::string& val_) {
+        setStr(val_);
+    }
+    UniValue(const char *val_) {
+        std::string s(val_);
+        setStr(s);
+    }
+    ~UniValue() {}
+
+    void clear();
+
+    bool setNull();
+    bool setBool(bool val);
+    bool setNumStr(const std::string& val);
+    bool setInt(uint64_t val);
+    bool setInt(int64_t val);
+    bool setInt(int val) { return setInt((int64_t)val); }
+    bool setFloat(double val);
+    bool setStr(const std::string& val);
+    bool setArray();
+    bool setObject();
+
+    enum VType getType() const { return typ; }
+    const std::string& getValStr() const { return val; }
+    bool empty() const { return (values.size() == 0); }
+
+    size_t size() const { return values.size(); }
+
+    bool getBool() const { return isTrue(); }
+    bool checkObject(const std::map<std::string,UniValue::VType>& memberTypes);
+    const UniValue& operator[](const std::string& key) const;
+    const UniValue& operator[](unsigned int index) const;
+    bool exists(const std::string& key) const { return (findKey(key) >= 0); }
+
+    bool isNull() const { return (typ == VNULL); }
+    bool isTrue() const { return (typ == VBOOL) && (val == "1"); }
+    bool isFalse() const { return (typ == VBOOL) && (val != "1"); }
+    bool isBool() const { return (typ == VBOOL); }
+    bool isStr() const { return (typ == VSTR); }
+    bool isNum() const { return (typ == VNUM); }
+    bool isArray() const { return (typ == VARR); }
+    bool isObject() const { return (typ == VOBJ); }
+
+    bool push_back(const UniValue& val);
+    bool push_back(const std::string& val_) {
+        UniValue tmpVal(VSTR, val_);
+        return push_back(tmpVal);
+    }
+    bool push_back(const char *val_) {
+        std::string s(val_);
+        return push_back(s);
+    }
+    bool push_backV(const std::vector<UniValue>& vec);
+
+    bool pushKV(const std::string& key, const UniValue& val);
+    bool pushKV(const std::string& key, const std::string& val) {
+        UniValue tmpVal(VSTR, val);
+        return pushKV(key, tmpVal);
+    }
+    bool pushKV(const std::string& key, const char *val_) {
+        std::string val(val_);
+        return pushKV(key, val);
+    }
+    bool pushKV(const std::string& key, int64_t val) {
+        UniValue tmpVal(val);
+        return pushKV(key, tmpVal);
+    }
+    bool pushKV(const std::string& key, uint64_t val) {
+        UniValue tmpVal(val);
+        return pushKV(key, tmpVal);
+    }
+    bool pushKV(const std::string& key, int val) {
+        UniValue tmpVal((int64_t)val);
+        return pushKV(key, tmpVal);
+    }
+    bool pushKV(const std::string& key, double val) {
+        UniValue tmpVal(val);
+        return pushKV(key, tmpVal);
+    }
+    bool pushKVs(const UniValue& obj);
+
+    std::string write(unsigned int prettyIndent = 0,
+                      unsigned int indentLevel = 0) const;
+
+    bool read(const char *raw);
+    bool read(const std::string& rawStr) {
+        return read(rawStr.c_str());
+    }
+
+private:
+    UniValue::VType typ;
+    std::string val;                       // numbers are stored as C++ strings
+    std::vector<std::string> keys;
+    std::vector<UniValue> values;
+
+    int findKey(const std::string& key) const;
+    void writeArray(unsigned int prettyIndent, unsigned int indentLevel, std::string& s) const;
+    void writeObject(unsigned int prettyIndent, unsigned int indentLevel, std::string& s) const;
+
+public:
+    // Strict type-specific getters, these throw std::runtime_error if the
+    // value is of unexpected type
+    std::vector<std::string> getKeys() const;
+    std::vector<UniValue> getValues() const;
+    bool get_bool() const;
+    std::string get_str() const;
+    int get_int() const;
+    int64_t get_int64() const;
+    double get_real() const;
+    const UniValue& get_obj() const;
+    const UniValue& get_array() const;
+
+    enum VType type() const { return getType(); }
+    bool push_back(std::pair<std::string,UniValue> pear) {
+        return pushKV(pear.first, pear.second);
+    }
+    friend const UniValue& find_value( const UniValue& obj, const std::string& name);
+};
+
+//
+// The following were added for compatibility with json_spirit.
+// Most duplicate other methods, and should be removed.
+//
+static inline std::pair<std::string,UniValue> Pair(const char *cKey, const char *cVal)
+{
+    std::string key(cKey);
+    UniValue uVal(cVal);
+    return std::make_pair(key, uVal);
+}
+
+static inline std::pair<std::string,UniValue> Pair(const char *cKey, std::string strVal)
+{
+    std::string key(cKey);
+    UniValue uVal(strVal);
+    return std::make_pair(key, uVal);
+}
+
+static inline std::pair<std::string,UniValue> Pair(const char *cKey, uint64_t u64Val)
+{
+    std::string key(cKey);
+    UniValue uVal(u64Val);
+    return std::make_pair(key, uVal);
+}
+
+static inline std::pair<std::string,UniValue> Pair(const char *cKey, int64_t i64Val)
+{
+    std::string key(cKey);
+    UniValue uVal(i64Val);
+    return std::make_pair(key, uVal);
+}
+
+static inline std::pair<std::string,UniValue> Pair(const char *cKey, bool iVal)
+{
+    std::string key(cKey);
+    UniValue uVal(iVal);
+    return std::make_pair(key, uVal);
+}
+
+static inline std::pair<std::string,UniValue> Pair(const char *cKey, int iVal)
+{
+    std::string key(cKey);
+    UniValue uVal(iVal);
+    return std::make_pair(key, uVal);
+}
+
+static inline std::pair<std::string,UniValue> Pair(const char *cKey, double dVal)
+{
+    std::string key(cKey);
+    UniValue uVal(dVal);
+    return std::make_pair(key, uVal);
+}
+
+static inline std::pair<std::string,UniValue> Pair(const char *cKey, const UniValue& uVal)
+{
+    std::string key(cKey);
+    return std::make_pair(key, uVal);
+}
+
+static inline std::pair<std::string,UniValue> Pair(std::string key, const UniValue& uVal)
+{
+    return std::make_pair(key, uVal);
+}
+
+enum jtokentype {
+    JTOK_ERR        = -1,
+    JTOK_NONE       = 0,                           // eof
+    JTOK_OBJ_OPEN,
+    JTOK_OBJ_CLOSE,
+    JTOK_ARR_OPEN,
+    JTOK_ARR_CLOSE,
+    JTOK_COLON,
+    JTOK_COMMA,
+    JTOK_KW_NULL,
+    JTOK_KW_TRUE,
+    JTOK_KW_FALSE,
+    JTOK_NUMBER,
+    JTOK_STRING,
+};
+
+extern enum jtokentype getJsonToken(std::string& tokenVal,
+                                    unsigned int& consumed, const char *raw);
+extern const char *uvTypeName(UniValue::VType t);
+
+extern const UniValue NullUniValue;
+
+const UniValue& find_value( const UniValue& obj, const std::string& name);
+
+#endif // __UNIVALUE_H__
\ No newline at end of file
diff --git a/src/univalue/lib/.gitignore b/src/univalue/lib/.gitignore
new file mode 100644
index 000000000..ca8c16dcd
--- /dev/null
+++ b/src/univalue/lib/.gitignore
@@ -0,0 +1,10 @@
+
+libunivalue-uninstalled.pc
+libunivalue.pc
+libunivalue.a
+gen
+
+.libs
+*.lo
+*.la
+
diff --git a/src/univalue/lib/univalue.cpp b/src/univalue/lib/univalue.cpp
new file mode 100644
index 000000000..883e8651f
--- /dev/null
+++ b/src/univalue/lib/univalue.cpp
@@ -0,0 +1,365 @@
+// Copyright 2014 BitPay Inc.
+// Copyright 2015 Bitcoin Core Developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <stdint.h>
+#include <ctype.h>
+#include <errno.h>
+#include <iomanip>
+#include <limits>
+#include <sstream>
+#include <stdexcept>
+#include <stdlib.h>
+#include <string.h>
+
+#include "univalue.h"
+
+namespace 
+{
+static bool ParsePrechecks(const std::string& str)
+{
+    if (str.empty()) // No empty string allowed
+        return false;
+    if (str.size() >= 1 && (isspace(str[0]) || isspace(str[str.size()-1]))) // No padding allowed
+        return false;
+    if (str.size() != strlen(str.c_str())) // No embedded NUL characters allowed
+        return false;
+    return true;
+}
+
+bool ParseInt32(const std::string& str, int32_t *out)
+{
+    if (!ParsePrechecks(str))
+        return false;
+    char *endp = NULL;
+    errno = 0; // strtol will not set errno if valid
+    long int n = strtol(str.c_str(), &endp, 10);
+    if(out) *out = (int32_t)n;
+    // Note that strtol returns a *long int*, so even if strtol doesn't report a over/underflow
+    // we still have to check that the returned value is within the range of an *int32_t*. On 64-bit
+    // platforms the size of these types may be different.
+    return endp && *endp == 0 && !errno &&
+        n >= std::numeric_limits<int32_t>::min() &&
+        n <= std::numeric_limits<int32_t>::max();
+}
+
+bool ParseInt64(const std::string& str, int64_t *out)
+{
+    if (!ParsePrechecks(str))
+        return false;
+    char *endp = NULL;
+    errno = 0; // strtoll will not set errno if valid
+    long long int n = strtoll(str.c_str(), &endp, 10);
+    if(out) *out = (int64_t)n;
+    // Note that strtoll returns a *long long int*, so even if strtol doesn't report a over/underflow
+    // we still have to check that the returned value is within the range of an *int64_t*.
+    return endp && *endp == 0 && !errno &&
+        n >= std::numeric_limits<int64_t>::min() &&
+        n <= std::numeric_limits<int64_t>::max();
+}
+
+bool ParseDouble(const std::string& str, double *out)
+{
+    if (!ParsePrechecks(str))
+        return false;
+    if (str.size() >= 2 && str[0] == '0' && str[1] == 'x') // No hexadecimal floats allowed
+        return false;
+    std::istringstream text(str);
+    text.imbue(std::locale::classic());
+    double result;
+    text >> result;
+    if(out) *out = result;
+    return text.eof() && !text.fail();
+}
+}
+
+using namespace std;
+
+const UniValue NullUniValue;
+
+void UniValue::clear()
+{
+    typ = VNULL;
+    val.clear();
+    keys.clear();
+    values.clear();
+}
+
+bool UniValue::setNull()
+{
+    clear();
+    return true;
+}
+
+bool UniValue::setBool(bool val_)
+{
+    clear();
+    typ = VBOOL;
+    if (val_)
+        val = "1";
+    return true;
+}
+
+static bool validNumStr(const string& s)
+{
+    string tokenVal;
+    unsigned int consumed;
+    enum jtokentype tt = getJsonToken(tokenVal, consumed, s.c_str());
+    return (tt == JTOK_NUMBER);
+}
+
+bool UniValue::setNumStr(const string& val_)
+{
+    if (!validNumStr(val_))
+        return false;
+
+    clear();
+    typ = VNUM;
+    val = val_;
+    return true;
+}
+
+bool UniValue::setInt(uint64_t val)
+{
+    string s;
+    ostringstream oss;
+
+    oss << val;
+
+    return setNumStr(oss.str());
+}
+
+bool UniValue::setInt(int64_t val)
+{
+    string s;
+    ostringstream oss;
+
+    oss << val;
+
+    return setNumStr(oss.str());
+}
+
+bool UniValue::setFloat(double val)
+{
+    string s;
+    ostringstream oss;
+
+    oss << std::setprecision(16) << val;
+
+    bool ret = setNumStr(oss.str());
+    typ = VNUM;
+    return ret;
+}
+
+bool UniValue::setStr(const string& val_)
+{
+    clear();
+    typ = VSTR;
+    val = val_;
+    return true;
+}
+
+bool UniValue::setArray()
+{
+    clear();
+    typ = VARR;
+    return true;
+}
+
+bool UniValue::setObject()
+{
+    clear();
+    typ = VOBJ;
+    return true;
+}
+
+bool UniValue::push_back(const UniValue& val)
+{
+    if (typ != VARR)
+        return false;
+
+    values.push_back(val);
+    return true;
+}
+
+bool UniValue::push_backV(const std::vector<UniValue>& vec)
+{
+    if (typ != VARR)
+        return false;
+
+    values.insert(values.end(), vec.begin(), vec.end());
+
+    return true;
+}
+
+bool UniValue::pushKV(const std::string& key, const UniValue& val)
+{
+    if (typ != VOBJ)
+        return false;
+
+    keys.push_back(key);
+    values.push_back(val);
+    return true;
+}
+
+bool UniValue::pushKVs(const UniValue& obj)
+{
+    if (typ != VOBJ || obj.typ != VOBJ)
+        return false;
+
+    for (unsigned int i = 0; i < obj.keys.size(); i++) {
+        keys.push_back(obj.keys[i]);
+        values.push_back(obj.values[i]);
+    }
+
+    return true;
+}
+
+int UniValue::findKey(const std::string& key) const
+{
+    for (unsigned int i = 0; i < keys.size(); i++) {
+        if (keys[i] == key)
+            return (int) i;
+    }
+
+    return -1;
+}
+
+bool UniValue::checkObject(const std::map<std::string,UniValue::VType>& t)
+{
+    for (std::map<std::string,UniValue::VType>::const_iterator it = t.begin();
+         it != t.end(); it++) {
+        int idx = findKey(it->first);
+        if (idx < 0)
+            return false;
+
+        if (values[idx].getType() != it->second)
+            return false;
+    }
+
+    return true;
+}
+
+const UniValue& UniValue::operator[](const std::string& key) const
+{
+    if (typ != VOBJ)
+        return NullUniValue;
+
+    int index = findKey(key);
+    if (index < 0)
+        return NullUniValue;
+
+    return values[index];
+}
+
+const UniValue& UniValue::operator[](unsigned int index) const
+{
+    if (typ != VOBJ && typ != VARR)
+        return NullUniValue;
+    if (index >= values.size())
+        return NullUniValue;
+
+    return values[index];
+}
+
+const char *uvTypeName(UniValue::VType t)
+{
+    switch (t) {
+    case UniValue::VNULL: return "null";
+    case UniValue::VBOOL: return "bool";
+    case UniValue::VOBJ: return "object";
+    case UniValue::VARR: return "array";
+    case UniValue::VSTR: return "string";
+    case UniValue::VNUM: return "number";
+    }
+
+    // not reached
+    return NULL;
+}
+
+const UniValue& find_value( const UniValue& obj, const std::string& name)
+{
+    for (unsigned int i = 0; i < obj.keys.size(); i++)
+    {
+        if( obj.keys[i] == name )
+        {
+            return obj.values[i];
+        }
+    }
+
+    return NullUniValue;
+}
+
+std::vector<std::string> UniValue::getKeys() const
+{
+    if (typ != VOBJ)
+        throw std::runtime_error("JSON value is not an object as expected");
+    return keys;
+}
+
+std::vector<UniValue> UniValue::getValues() const
+{
+    if (typ != VOBJ && typ != VARR)
+        throw std::runtime_error("JSON value is not an object or array as expected");
+    return values;
+}
+
+bool UniValue::get_bool() const
+{
+    if (typ != VBOOL)
+        throw std::runtime_error("JSON value is not a boolean as expected");
+    return getBool();
+}
+
+std::string UniValue::get_str() const
+{
+    if (typ != VSTR)
+        throw std::runtime_error("JSON value is not a string as expected");
+    return getValStr();
+}
+
+int UniValue::get_int() const
+{
+    if (typ != VNUM)
+        throw std::runtime_error("JSON value is not an integer as expected");
+    int32_t retval;
+    if (!ParseInt32(getValStr(), &retval))
+        throw std::runtime_error("JSON integer out of range");
+    return retval;
+}
+
+int64_t UniValue::get_int64() const
+{
+    if (typ != VNUM)
+        throw std::runtime_error("JSON value is not an integer as expected");
+    int64_t retval;
+    if (!ParseInt64(getValStr(), &retval))
+        throw std::runtime_error("JSON integer out of range");
+    return retval;
+}
+
+double UniValue::get_real() const
+{
+    if (typ != VNUM)
+        throw std::runtime_error("JSON value is not a number as expected");
+    double retval;
+    if (!ParseDouble(getValStr(), &retval))
+        throw std::runtime_error("JSON double out of range");
+    return retval;
+}
+
+const UniValue& UniValue::get_obj() const
+{
+    if (typ != VOBJ)
+        throw std::runtime_error("JSON value is not an object as expected");
+    return *this;
+}
+
+const UniValue& UniValue::get_array() const
+{
+    if (typ != VARR)
+        throw std::runtime_error("JSON value is not an array as expected");
+    return *this;
+}
+
diff --git a/src/univalue/lib/univalue_escapes.h b/src/univalue/lib/univalue_escapes.h
new file mode 100644
index 000000000..4133b24ca
--- /dev/null
+++ b/src/univalue/lib/univalue_escapes.h
@@ -0,0 +1,262 @@
+// Automatically generated file. Do not modify.
+#ifndef BITCOIN_UNIVALUE_UNIVALUE_ESCAPES_H
+#define BITCOIN_UNIVALUE_UNIVALUE_ESCAPES_H
+static const char *escapes[256] = {
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	"\\b",
+	"\\t",
+	"\\n",
+	NULL,
+	"\\f",
+	"\\r",
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	"\\\"",
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	"\\\\",
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+};
+#endif // BITCOIN_UNIVALUE_UNIVALUE_ESCAPES_H
diff --git a/src/univalue/lib/univalue_read.cpp b/src/univalue/lib/univalue_read.cpp
new file mode 100644
index 000000000..64591234c
--- /dev/null
+++ b/src/univalue/lib/univalue_read.cpp
@@ -0,0 +1,389 @@
+// Copyright 2014 BitPay Inc.
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <string.h>
+#include <vector>
+#include <stdio.h>
+#include "univalue.h"
+
+using namespace std;
+
+// convert hexadecimal string to unsigned integer
+static const char *hatoui(const char *first, const char *last,
+                          unsigned int& out)
+{
+    unsigned int result = 0;
+    for (; first != last; ++first)
+    {
+        int digit;
+        if (isdigit(*first))
+            digit = *first - '0';
+
+        else if (*first >= 'a' && *first <= 'f')
+            digit = *first - 'a' + 10;
+
+        else if (*first >= 'A' && *first <= 'F')
+            digit = *first - 'A' + 10;
+
+        else
+            break;
+
+        result = 16 * result + digit;
+    }
+    out = result;
+
+    return first;
+}
+
+enum jtokentype getJsonToken(string& tokenVal, unsigned int& consumed,
+                            const char *raw)
+{
+    tokenVal.clear();
+    consumed = 0;
+
+    const char *rawStart = raw;
+
+    while ((*raw) && (isspace(*raw)))             // skip whitespace
+        raw++;
+
+    switch (*raw) {
+
+    case 0:
+        return JTOK_NONE;
+
+    case '{':
+        raw++;
+        consumed = (raw - rawStart);
+        return JTOK_OBJ_OPEN;
+    case '}':
+        raw++;
+        consumed = (raw - rawStart);
+        return JTOK_OBJ_CLOSE;
+    case '[':
+        raw++;
+        consumed = (raw - rawStart);
+        return JTOK_ARR_OPEN;
+    case ']':
+        raw++;
+        consumed = (raw - rawStart);
+        return JTOK_ARR_CLOSE;
+
+    case ':':
+        raw++;
+        consumed = (raw - rawStart);
+        return JTOK_COLON;
+    case ',':
+        raw++;
+        consumed = (raw - rawStart);
+        return JTOK_COMMA;
+
+    case 'n':
+    case 't':
+    case 'f':
+        if (!strncmp(raw, "null", 4)) {
+            raw += 4;
+            consumed = (raw - rawStart);
+            return JTOK_KW_NULL;
+        } else if (!strncmp(raw, "true", 4)) {
+            raw += 4;
+            consumed = (raw - rawStart);
+            return JTOK_KW_TRUE;
+        } else if (!strncmp(raw, "false", 5)) {
+            raw += 5;
+            consumed = (raw - rawStart);
+            return JTOK_KW_FALSE;
+        } else
+            return JTOK_ERR;
+
+    case '-':
+    case '0':
+    case '1':
+    case '2':
+    case '3':
+    case '4':
+    case '5':
+    case '6':
+    case '7':
+    case '8':
+    case '9': {
+        // part 1: int
+        string numStr;
+
+        const char *first = raw;
+
+        const char *firstDigit = first;
+        if (!isdigit(*firstDigit))
+            firstDigit++;
+        if ((*firstDigit == '0') && isdigit(firstDigit[1]))
+            return JTOK_ERR;
+
+        numStr += *raw;                       // copy first char
+        raw++;
+
+        if ((*first == '-') && (!isdigit(*raw)))
+            return JTOK_ERR;
+
+        while ((*raw) && isdigit(*raw)) {     // copy digits
+            numStr += *raw;
+            raw++;
+        }
+
+        // part 2: frac
+        if (*raw == '.') {
+            numStr += *raw;                   // copy .
+            raw++;
+
+            if (!isdigit(*raw))
+                return JTOK_ERR;
+            while ((*raw) && isdigit(*raw)) { // copy digits
+                numStr += *raw;
+                raw++;
+            }
+        }
+
+        // part 3: exp
+        if (*raw == 'e' || *raw == 'E') {
+            numStr += *raw;                   // copy E
+            raw++;
+
+            if (*raw == '-' || *raw == '+') { // copy +/-
+                numStr += *raw;
+                raw++;
+            }
+
+            if (!isdigit(*raw))
+                return JTOK_ERR;
+            while ((*raw) && isdigit(*raw)) { // copy digits
+                numStr += *raw;
+                raw++;
+            }
+        }
+
+        tokenVal = numStr;
+        consumed = (raw - rawStart);
+        return JTOK_NUMBER;
+        }
+
+    case '"': {
+        raw++;                                // skip "
+
+        string valStr;
+
+        while (*raw) {
+            if (*raw < 0x20)
+                return JTOK_ERR;
+
+            else if (*raw == '\\') {
+                raw++;                        // skip backslash
+
+                switch (*raw) {
+                case '"':  valStr += "\""; break;
+                case '\\': valStr += "\\"; break;
+                case '/':  valStr += "/"; break;
+                case 'b':  valStr += "\b"; break;
+                case 'f':  valStr += "\f"; break;
+                case 'n':  valStr += "\n"; break;
+                case 'r':  valStr += "\r"; break;
+                case 't':  valStr += "\t"; break;
+
+                case 'u': {
+                    unsigned int codepoint;
+                    if (hatoui(raw + 1, raw + 1 + 4, codepoint) !=
+                               raw + 1 + 4)
+                        return JTOK_ERR;
+
+                    if (codepoint <= 0x7f)
+                        valStr.push_back((char)codepoint);
+                    else if (codepoint <= 0x7FF) {
+                        valStr.push_back((char)(0xC0 | (codepoint >> 6)));
+                        valStr.push_back((char)(0x80 | (codepoint & 0x3F)));
+                    } else if (codepoint <= 0xFFFF) {
+                        valStr.push_back((char)(0xE0 | (codepoint >> 12)));
+                        valStr.push_back((char)(0x80 | ((codepoint >> 6) & 0x3F)));
+                        valStr.push_back((char)(0x80 | (codepoint & 0x3F)));
+                    }
+
+                    raw += 4;
+                    break;
+                    }
+                default:
+                    return JTOK_ERR;
+
+                }
+
+                raw++;                        // skip esc'd char
+            }
+
+            else if (*raw == '"') {
+                raw++;                        // skip "
+                break;                        // stop scanning
+            }
+
+            else {
+                valStr += *raw;
+                raw++;
+            }
+        }
+
+        tokenVal = valStr;
+        consumed = (raw - rawStart);
+        return JTOK_STRING;
+        }
+
+    default:
+        return JTOK_ERR;
+    }
+}
+
+bool UniValue::read(const char *raw)
+{
+    clear();
+
+    bool expectName = false;
+    bool expectColon = false;
+    vector<UniValue*> stack;
+
+    string tokenVal;
+    unsigned int consumed;
+    enum jtokentype tok = JTOK_NONE;
+    enum jtokentype last_tok = JTOK_NONE;
+    do {
+        last_tok = tok;
+
+        tok = getJsonToken(tokenVal, consumed, raw);
+        if (tok == JTOK_NONE || tok == JTOK_ERR)
+            return false;
+        raw += consumed;
+
+        switch (tok) {
+
+        case JTOK_OBJ_OPEN:
+        case JTOK_ARR_OPEN: {
+            VType utyp = (tok == JTOK_OBJ_OPEN ? VOBJ : VARR);
+            if (!stack.size()) {
+                if (utyp == VOBJ)
+                    setObject();
+                else
+                    setArray();
+                stack.push_back(this);
+            } else {
+                UniValue tmpVal(utyp);
+                UniValue *top = stack.back();
+                top->values.push_back(tmpVal);
+
+                UniValue *newTop = &(top->values.back());
+                stack.push_back(newTop);
+            }
+
+            if (utyp == VOBJ)
+                expectName = true;
+            break;
+            }
+
+        case JTOK_OBJ_CLOSE:
+        case JTOK_ARR_CLOSE: {
+            if (!stack.size() || expectColon || (last_tok == JTOK_COMMA))
+                return false;
+
+            VType utyp = (tok == JTOK_OBJ_CLOSE ? VOBJ : VARR);
+            UniValue *top = stack.back();
+            if (utyp != top->getType())
+                return false;
+
+            stack.pop_back();
+            expectName = false;
+            break;
+            }
+
+        case JTOK_COLON: {
+            if (!stack.size() || expectName || !expectColon)
+                return false;
+
+            UniValue *top = stack.back();
+            if (top->getType() != VOBJ)
+                return false;
+
+            expectColon = false;
+            break;
+            }
+
+        case JTOK_COMMA: {
+            if (!stack.size() || expectName || expectColon ||
+                (last_tok == JTOK_COMMA) || (last_tok == JTOK_ARR_OPEN))
+                return false;
+
+            UniValue *top = stack.back();
+            if (top->getType() == VOBJ)
+                expectName = true;
+            break;
+            }
+
+        case JTOK_KW_NULL:
+        case JTOK_KW_TRUE:
+        case JTOK_KW_FALSE: {
+            if (!stack.size() || expectName || expectColon)
+                return false;
+
+            UniValue tmpVal;
+            switch (tok) {
+            case JTOK_KW_NULL:
+                // do nothing more
+                break;
+            case JTOK_KW_TRUE:
+                tmpVal.setBool(true);
+                break;
+            case JTOK_KW_FALSE:
+                tmpVal.setBool(false);
+                break;
+            default: /* impossible */ break;
+            }
+
+            UniValue *top = stack.back();
+            top->values.push_back(tmpVal);
+
+            break;
+            }
+
+        case JTOK_NUMBER: {
+            if (!stack.size() || expectName || expectColon)
+                return false;
+
+            UniValue tmpVal(VNUM, tokenVal);
+            UniValue *top = stack.back();
+            top->values.push_back(tmpVal);
+
+            break;
+            }
+
+        case JTOK_STRING: {
+            if (!stack.size())
+                return false;
+
+            UniValue *top = stack.back();
+
+            if (expectName) {
+                top->keys.push_back(tokenVal);
+                expectName = false;
+                expectColon = true;
+            } else {
+                UniValue tmpVal(VSTR, tokenVal);
+                top->values.push_back(tmpVal);
+            }
+
+            break;
+            }
+
+        default:
+            return false;
+        }
+    } while (!stack.empty ());
+
+    /* Check that nothing follows the initial construct (parsed above).  */
+    tok = getJsonToken(tokenVal, consumed, raw);
+    if (tok != JTOK_NONE)
+        return false;
+
+    return true;
+}
+
diff --git a/src/univalue/lib/univalue_write.cpp b/src/univalue/lib/univalue_write.cpp
new file mode 100644
index 000000000..bce3997af
--- /dev/null
+++ b/src/univalue/lib/univalue_write.cpp
@@ -0,0 +1,127 @@
+// Copyright 2014 BitPay Inc.
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <ctype.h>
+#include <iomanip>
+#include <sstream>
+#include <stdio.h>
+#include "univalue.h"
+#include "univalue_escapes.h"
+
+// TODO: Using UTF8
+
+using namespace std;
+
+static string json_escape(const string& inS)
+{
+    string outS;
+    outS.reserve(inS.size() * 2);
+
+    for (unsigned int i = 0; i < inS.size(); i++) {
+        unsigned char ch = inS[i];
+        const char *escStr = escapes[ch];
+
+        if (escStr)
+            outS += escStr;
+
+        else if (isprint(ch))
+            outS += ch;
+
+        else {
+            char tmpesc[16];
+            sprintf(tmpesc, "\\u%04x", ch);
+            outS += tmpesc;
+        }
+    }
+
+    return outS;
+}
+
+string UniValue::write(unsigned int prettyIndent,
+                       unsigned int indentLevel) const
+{
+    string s;
+    s.reserve(1024);
+
+    unsigned int modIndent = indentLevel;
+    if (modIndent == 0)
+        modIndent = 1;
+
+    switch (typ) {
+    case VNULL:
+        s += "null";
+        break;
+    case VOBJ:
+        writeObject(prettyIndent, modIndent, s);
+        break;
+    case VARR:
+        writeArray(prettyIndent, modIndent, s);
+        break;
+    case VSTR:
+        s += "\"" + json_escape(val) + "\"";
+        break;
+    case VNUM:
+        s += val;
+        break;
+    case VBOOL:
+        s += (val == "1" ? "true" : "false");
+        break;
+    }
+
+    return s;
+}
+
+static void indentStr(unsigned int prettyIndent, unsigned int indentLevel, string& s)
+{
+    s.append(prettyIndent * indentLevel, ' ');
+}
+
+void UniValue::writeArray(unsigned int prettyIndent, unsigned int indentLevel, string& s) const
+{
+    s += "[";
+    if (prettyIndent)
+        s += "\n";
+
+    for (unsigned int i = 0; i < values.size(); i++) {
+        if (prettyIndent)
+            indentStr(prettyIndent, indentLevel, s);
+        s += values[i].write(prettyIndent, indentLevel + 1);
+        if (i != (values.size() - 1)) {
+            s += ",";
+            if (prettyIndent)
+                s += " ";
+        }
+        if (prettyIndent)
+            s += "\n";
+    }
+
+    if (prettyIndent)
+        indentStr(prettyIndent, indentLevel - 1, s);
+    s += "]";
+}
+
+void UniValue::writeObject(unsigned int prettyIndent, unsigned int indentLevel, string& s) const
+{
+    s += "{";
+    if (prettyIndent)
+        s += "\n";
+
+    for (unsigned int i = 0; i < keys.size(); i++) {
+        if (prettyIndent)
+            indentStr(prettyIndent, indentLevel, s);
+        s += "\"" + json_escape(keys[i]) + "\":";
+        if (prettyIndent)
+            s += " ";
+        s += values[i].write(prettyIndent, indentLevel + 1);
+        if (i != (values.size() - 1))
+            s += ",";
+        if (prettyIndent)
+            s += "\n";
+    }
+
+    if (prettyIndent)
+        indentStr(prettyIndent, indentLevel - 1, s);
+    s += "}";
+}
+
diff --git a/src/univalue/pc/libunivalue-uninstalled.pc.in b/src/univalue/pc/libunivalue-uninstalled.pc.in
new file mode 100644
index 000000000..b7f53e875
--- /dev/null
+++ b/src/univalue/pc/libunivalue-uninstalled.pc.in
@@ -0,0 +1,9 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libunivalue
+Description: libunivalue, C++ universal value object and JSON library
+Version: @VERSION@
+Libs: ${pc_top_builddir}/${pcfiledir}/libunivalue.la
diff --git a/src/univalue/pc/libunivalue.pc.in b/src/univalue/pc/libunivalue.pc.in
new file mode 100644
index 000000000..358a2d5f7
--- /dev/null
+++ b/src/univalue/pc/libunivalue.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libunivalue
+Description: libunivalue, C++ universal value object and JSON library
+Version: @VERSION@
+Libs: -L${libdir} -lunivalue
+Cflags: -I${includedir}
diff --git a/src/univalue/test/.gitignore b/src/univalue/test/.gitignore
new file mode 100644
index 000000000..e4dea0df7
--- /dev/null
+++ b/src/univalue/test/.gitignore
@@ -0,0 +1,7 @@
+
+unitester
+
+*.log
+*.trs
+
+.libs
diff --git a/src/univalue/test/fail1.json b/src/univalue/test/fail1.json
new file mode 100644
index 000000000..6216b865f
--- /dev/null
+++ b/src/univalue/test/fail1.json
@@ -0,0 +1 @@
+"A JSON payload should be an object or array, not a string."
\ No newline at end of file
diff --git a/src/univalue/test/fail10.json b/src/univalue/test/fail10.json
new file mode 100644
index 000000000..5d8c0047b
--- /dev/null
+++ b/src/univalue/test/fail10.json
@@ -0,0 +1 @@
+{"Extra value after close": true} "misplaced quoted value"
\ No newline at end of file
diff --git a/src/univalue/test/fail11.json b/src/univalue/test/fail11.json
new file mode 100644
index 000000000..76eb95b45
--- /dev/null
+++ b/src/univalue/test/fail11.json
@@ -0,0 +1 @@
+{"Illegal expression": 1 + 2}
\ No newline at end of file
diff --git a/src/univalue/test/fail12.json b/src/univalue/test/fail12.json
new file mode 100644
index 000000000..77580a452
--- /dev/null
+++ b/src/univalue/test/fail12.json
@@ -0,0 +1 @@
+{"Illegal invocation": alert()}
\ No newline at end of file
diff --git a/src/univalue/test/fail13.json b/src/univalue/test/fail13.json
new file mode 100644
index 000000000..379406b59
--- /dev/null
+++ b/src/univalue/test/fail13.json
@@ -0,0 +1 @@
+{"Numbers cannot have leading zeroes": 013}
\ No newline at end of file
diff --git a/src/univalue/test/fail14.json b/src/univalue/test/fail14.json
new file mode 100644
index 000000000..0ed366b38
--- /dev/null
+++ b/src/univalue/test/fail14.json
@@ -0,0 +1 @@
+{"Numbers cannot be hex": 0x14}
\ No newline at end of file
diff --git a/src/univalue/test/fail15.json b/src/univalue/test/fail15.json
new file mode 100644
index 000000000..fc8376b60
--- /dev/null
+++ b/src/univalue/test/fail15.json
@@ -0,0 +1 @@
+["Illegal backslash escape: \x15"]
\ No newline at end of file
diff --git a/src/univalue/test/fail16.json b/src/univalue/test/fail16.json
new file mode 100644
index 000000000..3fe21d4b5
--- /dev/null
+++ b/src/univalue/test/fail16.json
@@ -0,0 +1 @@
+[\naked]
\ No newline at end of file
diff --git a/src/univalue/test/fail17.json b/src/univalue/test/fail17.json
new file mode 100644
index 000000000..62b9214ae
--- /dev/null
+++ b/src/univalue/test/fail17.json
@@ -0,0 +1 @@
+["Illegal backslash escape: \017"]
\ No newline at end of file
diff --git a/src/univalue/test/fail18.json b/src/univalue/test/fail18.json
new file mode 100644
index 000000000..edac92716
--- /dev/null
+++ b/src/univalue/test/fail18.json
@@ -0,0 +1 @@
+[[[[[[[[[[[[[[[[[[[["Too deep"]]]]]]]]]]]]]]]]]]]]
\ No newline at end of file
diff --git a/src/univalue/test/fail19.json b/src/univalue/test/fail19.json
new file mode 100644
index 000000000..3b9c46fa9
--- /dev/null
+++ b/src/univalue/test/fail19.json
@@ -0,0 +1 @@
+{"Missing colon" null}
\ No newline at end of file
diff --git a/src/univalue/test/fail2.json b/src/univalue/test/fail2.json
new file mode 100644
index 000000000..6b7c11e5a
--- /dev/null
+++ b/src/univalue/test/fail2.json
@@ -0,0 +1 @@
+["Unclosed array"
\ No newline at end of file
diff --git a/src/univalue/test/fail20.json b/src/univalue/test/fail20.json
new file mode 100644
index 000000000..27c1af3e7
--- /dev/null
+++ b/src/univalue/test/fail20.json
@@ -0,0 +1 @@
+{"Double colon":: null}
\ No newline at end of file
diff --git a/src/univalue/test/fail21.json b/src/univalue/test/fail21.json
new file mode 100644
index 000000000..62474573b
--- /dev/null
+++ b/src/univalue/test/fail21.json
@@ -0,0 +1 @@
+{"Comma instead of colon", null}
\ No newline at end of file
diff --git a/src/univalue/test/fail22.json b/src/univalue/test/fail22.json
new file mode 100644
index 000000000..a7752581b
--- /dev/null
+++ b/src/univalue/test/fail22.json
@@ -0,0 +1 @@
+["Colon instead of comma": false]
\ No newline at end of file
diff --git a/src/univalue/test/fail23.json b/src/univalue/test/fail23.json
new file mode 100644
index 000000000..494add1ca
--- /dev/null
+++ b/src/univalue/test/fail23.json
@@ -0,0 +1 @@
+["Bad value", truth]
\ No newline at end of file
diff --git a/src/univalue/test/fail24.json b/src/univalue/test/fail24.json
new file mode 100644
index 000000000..caff239bf
--- /dev/null
+++ b/src/univalue/test/fail24.json
@@ -0,0 +1 @@
+['single quote']
\ No newline at end of file
diff --git a/src/univalue/test/fail25.json b/src/univalue/test/fail25.json
new file mode 100644
index 000000000..8b7ad23e0
--- /dev/null
+++ b/src/univalue/test/fail25.json
@@ -0,0 +1 @@
+["	tab	character	in	string	"]
\ No newline at end of file
diff --git a/src/univalue/test/fail26.json b/src/univalue/test/fail26.json
new file mode 100644
index 000000000..845d26a6a
--- /dev/null
+++ b/src/univalue/test/fail26.json
@@ -0,0 +1 @@
+["tab\   character\   in\  string\  "]
\ No newline at end of file
diff --git a/src/univalue/test/fail27.json b/src/univalue/test/fail27.json
new file mode 100644
index 000000000..6b01a2ca4
--- /dev/null
+++ b/src/univalue/test/fail27.json
@@ -0,0 +1,2 @@
+["line
+break"]
\ No newline at end of file
diff --git a/src/univalue/test/fail28.json b/src/univalue/test/fail28.json
new file mode 100644
index 000000000..621a0101c
--- /dev/null
+++ b/src/univalue/test/fail28.json
@@ -0,0 +1,2 @@
+["line\
+break"]
\ No newline at end of file
diff --git a/src/univalue/test/fail29.json b/src/univalue/test/fail29.json
new file mode 100644
index 000000000..47ec421bb
--- /dev/null
+++ b/src/univalue/test/fail29.json
@@ -0,0 +1 @@
+[0e]
\ No newline at end of file
diff --git a/src/univalue/test/fail3.json b/src/univalue/test/fail3.json
new file mode 100644
index 000000000..168c81eb7
--- /dev/null
+++ b/src/univalue/test/fail3.json
@@ -0,0 +1 @@
+{unquoted_key: "keys must be quoted"}
\ No newline at end of file
diff --git a/src/univalue/test/fail30.json b/src/univalue/test/fail30.json
new file mode 100644
index 000000000..8ab0bc4b8
--- /dev/null
+++ b/src/univalue/test/fail30.json
@@ -0,0 +1 @@
+[0e+]
\ No newline at end of file
diff --git a/src/univalue/test/fail31.json b/src/univalue/test/fail31.json
new file mode 100644
index 000000000..1cce602b5
--- /dev/null
+++ b/src/univalue/test/fail31.json
@@ -0,0 +1 @@
+[0e+-1]
\ No newline at end of file
diff --git a/src/univalue/test/fail32.json b/src/univalue/test/fail32.json
new file mode 100644
index 000000000..45cba7396
--- /dev/null
+++ b/src/univalue/test/fail32.json
@@ -0,0 +1 @@
+{"Comma instead if closing brace": true,
\ No newline at end of file
diff --git a/src/univalue/test/fail33.json b/src/univalue/test/fail33.json
new file mode 100644
index 000000000..ca5eb19dc
--- /dev/null
+++ b/src/univalue/test/fail33.json
@@ -0,0 +1 @@
+["mismatch"}
\ No newline at end of file
diff --git a/src/univalue/test/fail34.json b/src/univalue/test/fail34.json
new file mode 100644
index 000000000..3f8be1728
--- /dev/null
+++ b/src/univalue/test/fail34.json
@@ -0,0 +1 @@
+{} garbage
\ No newline at end of file
diff --git a/src/univalue/test/fail4.json b/src/univalue/test/fail4.json
new file mode 100644
index 000000000..9de168bf3
--- /dev/null
+++ b/src/univalue/test/fail4.json
@@ -0,0 +1 @@
+["extra comma",]
\ No newline at end of file
diff --git a/src/univalue/test/fail5.json b/src/univalue/test/fail5.json
new file mode 100644
index 000000000..ddf3ce3d2
--- /dev/null
+++ b/src/univalue/test/fail5.json
@@ -0,0 +1 @@
+["double extra comma",,]
\ No newline at end of file
diff --git a/src/univalue/test/fail6.json b/src/univalue/test/fail6.json
new file mode 100644
index 000000000..ed91580e1
--- /dev/null
+++ b/src/univalue/test/fail6.json
@@ -0,0 +1 @@
+[   , "<-- missing value"]
\ No newline at end of file
diff --git a/src/univalue/test/fail7.json b/src/univalue/test/fail7.json
new file mode 100644
index 000000000..8a96af3e4
--- /dev/null
+++ b/src/univalue/test/fail7.json
@@ -0,0 +1 @@
+["Comma after the close"],
\ No newline at end of file
diff --git a/src/univalue/test/fail8.json b/src/univalue/test/fail8.json
new file mode 100644
index 000000000..b28479c6e
--- /dev/null
+++ b/src/univalue/test/fail8.json
@@ -0,0 +1 @@
+["Extra close"]]
\ No newline at end of file
diff --git a/src/univalue/test/fail9.json b/src/univalue/test/fail9.json
new file mode 100644
index 000000000..5815574f3
--- /dev/null
+++ b/src/univalue/test/fail9.json
@@ -0,0 +1 @@
+{"Extra comma": true,}
\ No newline at end of file
diff --git a/src/univalue/test/pass1.json b/src/univalue/test/pass1.json
new file mode 100644
index 000000000..70e268543
--- /dev/null
+++ b/src/univalue/test/pass1.json
@@ -0,0 +1,58 @@
+[
+    "JSON Test Pattern pass1",
+    {"object with 1 member":["array with 1 element"]},
+    {},
+    [],
+    -42,
+    true,
+    false,
+    null,
+    {
+        "integer": 1234567890,
+        "real": -9876.543210,
+        "e": 0.123456789e-12,
+        "E": 1.234567890E+34,
+        "":  23456789012E66,
+        "zero": 0,
+        "one": 1,
+        "space": " ",
+        "quote": "\"",
+        "backslash": "\\",
+        "controls": "\b\f\n\r\t",
+        "slash": "/ & \/",
+        "alpha": "abcdefghijklmnopqrstuvwyz",
+        "ALPHA": "ABCDEFGHIJKLMNOPQRSTUVWYZ",
+        "digit": "0123456789",
+        "0123456789": "digit",
+        "special": "`1~!@#$%^&*()_+-={':[,]}|;.</>?",
+        "hex": "\u0123\u4567\u89AB\uCDEF\uabcd\uef4A",
+        "true": true,
+        "false": false,
+        "null": null,
+        "array":[  ],
+        "object":{  },
+        "address": "50 St. James Street",
+        "url": "http://www.JSON.org/",
+        "comment": "// /* <!-- --",
+        "# -- --> */": " ",
+        " s p a c e d " :[1,2 , 3
+
+,
+
+4 , 5        ,          6           ,7        ],"compact":[1,2,3,4,5,6,7],
+        "jsontext": "{\"object with 1 member\":[\"array with 1 element\"]}",
+        "quotes": "&#34; \u0022 %22 0x22 034 &#x22;",
+        "\/\\\"\uCAFE\uBABE\uAB98\uFCDE\ubcda\uef4A\b\f\n\r\t`1~!@#$%^&*()_+-=[]{}|;:',./<>?"
+: "A key can be any string"
+    },
+    0.5 ,98.6
+,
+99.44
+,
+
+1066,
+1e1,
+0.1e1,
+1e-1,
+1e00,2e+00,2e-00
+,"rosebud"]
\ No newline at end of file
diff --git a/src/univalue/test/pass2.json b/src/univalue/test/pass2.json
new file mode 100644
index 000000000..d3c63c7ad
--- /dev/null
+++ b/src/univalue/test/pass2.json
@@ -0,0 +1 @@
+[[[[[[[[[[[[[[[[[[["Not too deep"]]]]]]]]]]]]]]]]]]]
\ No newline at end of file
diff --git a/src/univalue/test/pass3.json b/src/univalue/test/pass3.json
new file mode 100644
index 000000000..4528d51f1
--- /dev/null
+++ b/src/univalue/test/pass3.json
@@ -0,0 +1,6 @@
+{
+    "JSON Test Pattern pass3": {
+        "The outermost value": "must be an object or array.",
+        "In this test": "It is an object."
+    }
+}
diff --git a/src/univalue/test/unitester.cpp b/src/univalue/test/unitester.cpp
new file mode 100644
index 000000000..835556e03
--- /dev/null
+++ b/src/univalue/test/unitester.cpp
@@ -0,0 +1,115 @@
+// Copyright 2014 BitPay Inc.
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <cassert>
+#include <string>
+#include "univalue.h"
+
+#ifndef JSON_TEST_SRC
+#error JSON_TEST_SRC must point to test source directory
+#endif
+
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+#endif
+
+using namespace std;
+string srcdir(JSON_TEST_SRC);
+
+static void runtest(string filename, const string& jdata)
+{
+        fprintf(stderr, "test %s\n", filename.c_str());
+
+        string prefix = filename.substr(0, 4);
+
+        bool wantPass = (prefix == "pass");
+        bool wantFail = (prefix == "fail");
+        assert(wantPass || wantFail);
+
+        UniValue val;
+        bool testResult = val.read(jdata);
+
+        if (wantPass) {
+            assert(testResult == true);
+        } else {
+            assert(testResult == false);
+        }
+}
+
+static void runtest_file(const char *filename_)
+{
+        string basename(filename_);
+        string filename = srcdir + "/" + basename;
+        FILE *f = fopen(filename.c_str(), "r");
+        assert(f != NULL);
+
+        string jdata;
+
+        char buf[4096];
+        while (!feof(f)) {
+                int bread = fread(buf, 1, sizeof(buf), f);
+                assert(!ferror(f));
+
+                string s(buf, bread);
+                jdata += s;
+        }
+
+        assert(!ferror(f));
+        fclose(f);
+
+        runtest(basename, jdata);
+}
+
+static const char *filenames[] = {
+        "fail10.json",
+        "fail11.json",
+        "fail12.json",
+        "fail13.json",
+        "fail14.json",
+        "fail15.json",
+        "fail16.json",
+        "fail17.json",
+        //"fail18.json",             // investigate
+        "fail19.json",
+        "fail1.json",
+        "fail20.json",
+        "fail21.json",
+        "fail22.json",
+        "fail23.json",
+        "fail24.json",
+        "fail25.json",
+        "fail26.json",
+        "fail27.json",
+        "fail28.json",
+        "fail29.json",
+        "fail2.json",
+        "fail30.json",
+        "fail31.json",
+        "fail32.json",
+        "fail33.json",
+        "fail34.json",
+        "fail3.json",
+        "fail4.json",                // extra comma
+        "fail5.json",
+        "fail6.json",
+        "fail7.json",
+        "fail8.json",
+        "fail9.json",               // extra comma
+        "pass1.json",
+        "pass2.json",
+        "pass3.json",
+};
+
+int main (int argc, char *argv[])
+{
+    for (unsigned int fidx = 0; fidx < ARRAY_SIZE(filenames); fidx++) {
+        runtest_file(filenames[fidx]);
+    }
+
+    return 0;
+}
+