diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 63477f20f1..2bdd7bebe8 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,646 +1,647 @@
 # Copyright (c) 2017 The Bitcoin developers
 
 project(bitcoind)
 
 set(CMAKE_CXX_STANDARD 14)
 
 # Default visibility is hidden on all targets.
 set(CMAKE_C_VISIBILITY_PRESET hidden)
 set(CMAKE_CXX_VISIBILITY_PRESET hidden)
 
 option(BUILD_BITCOIN_WALLET "Activate the wallet functionality" ON)
 option(BUILD_BITCOIN_ZMQ "Activate the ZeroMQ functionalities" ON)
 option(BUILD_BITCOIN_CLI "Build bitcoin-cli" ON)
 option(BUILD_BITCOIN_TX "Build bitcoin-tx" ON)
 option(BUILD_BITCOIN_QT "Build bitcoin-qt" ON)
 option(BUILD_BITCOIN_SEEDER "Build bitcoin-seeder" ON)
 option(BUILD_LIBBITCOINCONSENSUS "Build the bitcoinconsenus shared library" ON)
 option(ENABLE_BIP70 "Enable BIP70 (payment protocol) support in GUI" ON)
 option(ENABLE_HARDENING "Harden the executables" ON)
 option(ENABLE_REDUCE_EXPORTS "Reduce the amount of exported symbols" OFF)
 option(ENABLE_STATIC_LIBSTDCXX "Statically link libstdc++" OFF)
 option(ENABLE_GLIBC_BACK_COMPAT "Enable Glibc compatibility features" OFF)
 option(ENABLE_QRCODE "Enable QR code display" ON)
 option(ENABLE_UPNP "Enable UPnP support" ON)
 option(ENABLE_WERROR "Promote some compiler warnings to errors" OFF)
 option(START_WITH_UPNP "Make UPnP the default to map ports" OFF)
 option(ENABLE_CLANG_TIDY "Enable clang-tidy checks for Bitcoin ABC" OFF)
 option(ENABLE_PROFILING "Select the profiling tool to use" OFF)
 option(USE_LD_GOLD "Try to use gold as a linker if available" ON)
 
 if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
 	set(DEFAULT_ENABLE_DBUS_NOTIFICATIONS ON)
 endif()
 option(ENABLE_DBUS_NOTIFICATIONS "Enable DBus desktop notifications. Linux only." ${DEFAULT_ENABLE_DBUS_NOTIFICATIONS})
 
 # If ccache is available, then use it.
 find_program(CCACHE ccache)
 if(CCACHE)
 	message(STATUS "Using ccache: ${CCACHE}")
 	set(CMAKE_C_COMPILER_LAUNCHER ${CCACHE})
 	set(CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE})
 endif(CCACHE)
 
 # Disable what we do not need for the native build.
 include(NativeExecutable)
 native_add_cmake_flags(
 	"-DBUILD_BITCOIN_WALLET=OFF"
 	"-DBUILD_BITCOIN_QT=OFF"
 	"-DBUILD_BITCOIN_ZMQ=OFF"
 	"-DENABLE_QRCODE=OFF"
 	"-DENABLE_UPNP=OFF"
 	# Forward the current setting for clang-tidy
 	"-DENABLE_CLANG_TIDY=${ENABLE_CLANG_TIDY}"
 )
 
 if(ENABLE_CLANG_TIDY)
 	include(ClangTidy)
 endif()
 
 if(ENABLE_SANITIZERS)
 	include(Sanitizers)
 	enable_sanitizers(${ENABLE_SANITIZERS})
 endif()
 
 include(AddCompilerFlags)
 
 if(USE_LD_GOLD)
 	add_linker_flags(-fuse-ld=gold)
 endif()
 
 # Prefer -g3, defaults to -g if unavailable
 foreach(LANGUAGE C CXX)
 	set(COMPILER_DEBUG_LEVEL -g)
 	check_compiler_flag(G3_IS_SUPPORTED ${LANGUAGE} -g3)
 	if(${G3_IS_SUPPORTED})
 		set(COMPILER_DEBUG_LEVEL -g3)
 	endif()
 	add_compile_options_to_configuration_for_language(Debug ${LANGUAGE} ${COMPILER_DEBUG_LEVEL})
 endforeach()
 
 # Define the debugging symbols DEBUG and DEBUG_LOCKORDER when the Debug build
 # type is selected.
 add_compile_definitions_to_configuration(Debug DEBUG DEBUG_LOCKORDER)
 
 # Add -ftrapv when building in Debug
 add_compile_options_to_configuration(Debug -ftrapv)
 
 # All versions of gcc that we commonly use for building are subject to bug
 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90348. To work around that, set
 # -fstack-reuse=none for all gcc builds. (Only gcc understands this flag)
 if(NOT ENABLE_CLANG_TIDY)
 	add_compiler_flags(-fstack-reuse=none)
 endif()
 
 # Ensure that WINDRES_PREPROC is enabled when using windres.
 if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
 	# Ensure that WINDRES_PREPROC is enabled when using windres.
 	list(APPEND CMAKE_RC_FLAGS "-DWINDRES_PREPROC")
 
 	# Build all static so there is no dll file to distribute.
 	add_linker_flags(-static)
 endif()
 
 if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
 	add_compile_definitions(MAC_OSX OBJC_OLD_DISPATCH_PROTOTYPES=0)
 	add_linker_flags(-Wl,-dead_strip_dylibs)
 endif()
 
 if(ENABLE_REDUCE_EXPORTS)
 	# Default visibility is set by CMAKE_<LANG>_VISIBILITY_PRESET, but this
 	# doesn't tell if the visibility set is effective.
 	# Check if the flag -fvisibility=hidden is supported, as using the hidden
 	# visibility is a requirement to reduce exports.
 	check_compiler_flag(HAS_CXX_FVISIBILITY CXX -fvisibility=hidden)
 	if(NOT HAS_CXX_FVISIBILITY)
 		message(FATAL_ERROR "Cannot set default symbol visibility. Use -DENABLE_REDUCE_EXPORTS=OFF.")
 	endif()
 
 	# Also hide symbols from static libraries
 	add_linker_flags(-Wl,--exclude-libs,ALL)
 endif()
 
 # Enable statically linking libstdc++
 if(ENABLE_STATIC_LIBSTDCXX)
 	add_linker_flags(-static-libstdc++)
 endif()
 
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
 if(ENABLE_HARDENING)
 	# Enable stack protection
 	add_cxx_compiler_flags(-fstack-protector-all -Wstack-protector)
 
 	# Enable some buffer overflow checking
 	add_compiler_flags(-U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2)
 
 	# Enable ASLR (these flags are primarily targeting MinGw)
 	add_linker_flags(-Wl,--dynamicbase -Wl,--nxcompat -Wl,--high-entropy-va)
 
 	# Make the relocated sections read-only
 	add_linker_flags(-Wl,-z,relro -Wl,-z,now)
 
 	# CMake provides the POSITION_INDEPENDENT_CODE property to set PIC/PIE.
 	# Unfortunately setting the -pie linker flag this way require CMake >= 3.14,
 	# which is not widely distributed at the time of writing.
 	# FIXME: remove the fallback case when cmake >= 3.14 get enforced.
 	if(POLICY CMP0083)
 		cmake_policy(SET CMP0083 NEW)
 		include(CheckPIESupported)
 		check_pie_supported()
 	elseif(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
 		add_linker_flags(-pie)
 	endif()
 
 	if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
 		# MinGw provides its own libssp for stack smashing protection
 		link_libraries(ssp)
 	endif()
 endif()
 
 if(ENABLE_PROFILING MATCHES "gprof")
 	message(STATUS "Enable profiling with gprof")
 
 	# -pg is incompatible with -pie. Since hardening and profiling together
 	# doesn't make sense, we simply make them mutually exclusive here.
 	# Additionally, hardened toolchains may force -pie by default, in which
 	# case it needs to be turned off with -no-pie.
 	if(ENABLE_HARDENING)
 		message(FATAL_ERROR "Profiling with gprof requires disabling hardening with -DENABLE_HARDENING=OFF.")
 	endif()
 	add_linker_flags(-no-pie)
 
 	add_compiler_flags(-pg)
 	add_linker_flags(-pg)
 endif()
 
 # Enable warning
 add_c_compiler_flags(-Wnested-externs -Wstrict-prototypes)
 add_compiler_flags(
 	-Wall
 	-Wextra
 	-Wformat
 	-Wvla
 	-Wformat-security
 	-Wcast-align
 	-Wunused-parameter
 	-Wmissing-braces
 	-Wthread-safety-analysis
 	-Wshadow
 	-Wrange-loop-analysis
 	-Wredundant-decls
 	-Wredundant-move
 )
 
 option(EXTRA_WARNINGS "Enable extra warnings" OFF)
 if(EXTRA_WARNINGS)
 	add_cxx_compiler_flags(-Wsuggest-override)
 else()
 	add_compiler_flags(-Wno-unused-parameter)
 	add_compiler_flags(-Wno-implicit-fallthrough)
 endif()
 
 if(ENABLE_WERROR)
 	add_compiler_flags(
 		-Werror=vla
 		-Werror=thread-safety-analysis
 	)
 endif()
 
 # Create a target for OpenSSL
 include(BrewHelper)
 find_brew_prefix(OPENSSL_ROOT_DIR openssl)
 find_package(OpenSSL REQUIRED)
 
 # libtool style configure
 add_subdirectory(config)
 
 # Enable LFS (Large File Support) on targets that don't have it natively.
 # This should be defined before the libraries are included as leveldb need the
 # definition to be set.
 if(NOT HAVE_LARGE_FILE_SUPPORT)
 	add_compile_definitions(_FILE_OFFSET_BITS=64)
 	add_linker_flags(-Wl,--large-address-aware)
 endif()
 
 if(ENABLE_GLIBC_BACK_COMPAT)
 	# Wrap some glibc functions with ours
 	add_linker_flags(-Wl,--wrap=__divmoddi4)
 	add_linker_flags(-Wl,--wrap=log2f)
 
 	if(NOT HAVE_LARGE_FILE_SUPPORT)
 		add_linker_flags(-Wl,--wrap=fcntl -Wl,--wrap=fcntl64)
 	endif()
 endif()
 
 
 # Make sure that all the global compiler and linker flags are set BEFORE
 # including the libraries so they apply as needed.
 
 
 # libraries
 add_subdirectory(crypto)
 add_subdirectory(leveldb)
 add_subdirectory(secp256k1)
 add_subdirectory(univalue)
 
 # Find the git root, and returns the full path to the .git/logs/HEAD file if
 # it exists.
 function(find_git_head_logs_file RESULT)
 	find_package(Git)
 	if(GIT_FOUND)
 		execute_process(
 			COMMAND "${GIT_EXECUTABLE}" "rev-parse" "--show-toplevel"
 			WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
 			OUTPUT_VARIABLE GIT_ROOT
 			RESULT_VARIABLE GIT_RESULT
 			OUTPUT_STRIP_TRAILING_WHITESPACE
 			ERROR_QUIET
 		)
 
 		if(GIT_RESULT EQUAL 0)
 			set(GIT_LOGS_DIR "${GIT_ROOT}/.git/logs")
 			set(GIT_HEAD_LOGS_FILE "${GIT_LOGS_DIR}/HEAD")
 			# If the .git/logs/HEAD does not exist, create it
 			if(NOT EXISTS "${GIT_HEAD_LOGS_FILE}")
 				file(MAKE_DIRECTORY "${GIT_LOGS_DIR}")
 				file(TOUCH "${GIT_HEAD_LOGS_FILE}")
 			endif()
 			set(${RESULT} "${GIT_HEAD_LOGS_FILE}" PARENT_SCOPE)
 		endif()
 	endif()
 endfunction()
 
 find_git_head_logs_file(GIT_HEAD_LOGS_FILE)
 
 set(OBJ_DIR "${CMAKE_CURRENT_BINARY_DIR}/obj")
 file(MAKE_DIRECTORY "${OBJ_DIR}")
 set(BUILD_HEADER "${OBJ_DIR}/build.h")
 set(BUILD_HEADER_TMP "${BUILD_HEADER}.tmp")
 
 add_custom_command(
 	DEPENDS
 		"${GIT_HEAD_LOGS_FILE}"
 		"${CMAKE_SOURCE_DIR}/share/genbuild.sh"
 	OUTPUT
 		"${BUILD_HEADER}"
 	COMMAND
 		"${CMAKE_SOURCE_DIR}/share/genbuild.sh"
 		"${BUILD_HEADER_TMP}"
 		"${CMAKE_SOURCE_DIR}"
 	COMMAND
 		${CMAKE_COMMAND} -E copy_if_different "${BUILD_HEADER_TMP}" "${BUILD_HEADER}"
 	COMMAND
 		${CMAKE_COMMAND} -E remove "${BUILD_HEADER_TMP}"
 )
 
 # Because the Bitcoin ABc source code is disorganised, we
 # end up with a bunch of libraries without any apparent
 # cohesive structure. This is inherited from Bitcoin Core
 # and reflecting this.
 # TODO: Improve the structure once cmake is rocking.
 
 # Various completely unrelated features shared by all executables.
 add_library(util
 	chainparamsbase.cpp
 	clientversion.cpp
 	compat/glibc_sanity.cpp
 	compat/glibcxx_sanity.cpp
 	compat/strnlen.cpp
 	fs.cpp
 	logging.cpp
 	random.cpp
 	rcu.cpp
 	rpc/protocol.cpp
 	rpc/util.cpp
 	support/cleanse.cpp
 	support/lockedpool.cpp
 	sync.cpp
 	threadinterrupt.cpp
 	uint256.cpp
 	util/bytevectorhash.cpp
 	util/moneystr.cpp
 	util/settings.cpp
 	util/strencodings.cpp
 	util/system.cpp
 	util/threadnames.cpp
 	util/time.cpp
 
 	# obj/build.h
 	"${BUILD_HEADER}"
 )
 
 target_compile_definitions(util PUBLIC HAVE_CONFIG_H HAVE_BUILD_INFO)
 target_include_directories(util
 	PUBLIC
 		.
 		# To access the config/ and obj/ directories
 		${CMAKE_CURRENT_BINARY_DIR}
 )
 
 if(ENABLE_GLIBC_BACK_COMPAT)
 	target_sources(util PRIVATE compat/glibc_compat.cpp)
 endif()
 
 # Target specific configs
 if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
 	set(Boost_USE_STATIC_LIBS ON)
 	set(Boost_USE_STATIC_RUNTIME ON)
 	set(Boost_THREADAPI win32)
 
 	find_package(SHLWAPI REQUIRED)
 	# We cannot use the imported target here, because cmake will introduce an
 	# -isystem compilation directive and cause the build to fail with MinGw.
 	# This comes from a couple cmake bugs:
 	#  - https://gitlab.kitware.com/cmake/cmake/issues/16291
 	#  - https://gitlab.kitware.com/cmake/cmake/issues/19095
 	# These issues are solved from cmake 3.14.1. Once this version is enforced,
 	# the following can be used:
 	# target_link_libraries(util SHLWAPI::shlwapi)
 	target_link_libraries(util ${SHLWAPI_LIBRARIES})
 	target_include_directories(util PUBLIC ${SHLWAPI_INCLUDE_DIRS})
 
 	find_library(WS2_32_LIBRARY NAMES ws2_32)
 	target_link_libraries(util ${WS2_32_LIBRARY})
 
 	target_compile_definitions(util PUBLIC BOOST_THREAD_USE_LIB)
 endif()
 
 # Boost packages
 set(BOOST_PACKAGES_REQUIRED chrono filesystem thread)
 
 function(prepend var prefix)
 	set(listVar "")
 	foreach(f ${ARGN})
 		list(APPEND listVar "${prefix}${f}")
 	endforeach(f)
 	set(${var} "${listVar}" PARENT_SCOPE)
 endfunction(prepend)
 
 prepend(BOOST_LIBRARIES "Boost::" ${BOOST_PACKAGES_REQUIRED})
 
 find_package(Boost 1.58 REQUIRED ${BOOST_PACKAGES_REQUIRED})
 target_link_libraries(util univalue crypto ${BOOST_LIBRARIES})
 
 # Make sure boost uses std::atomic (it doesn't before 1.63)
 target_compile_definitions(util PUBLIC BOOST_SP_USE_STD_ATOMIC BOOST_AC_USE_STD_ATOMIC)
 
 # More completely unrelated features shared by all executables.
 # Because nothing says this is different from util than "common"
 add_library(common
 	amount.cpp
 	base58.cpp
 	cashaddr.cpp
 	cashaddrenc.cpp
 	chainparams.cpp
 	config.cpp
 	consensus/merkle.cpp
 	coins.cpp
 	compressor.cpp
 	eventloop.cpp
 	feerate.cpp
 	globals.cpp
 	core_read.cpp
 	core_write.cpp
 	key.cpp
 	key_io.cpp
 	keystore.cpp
 	netaddress.cpp
 	netbase.cpp
 	primitives/block.cpp
 	protocol.cpp
 	psbt.cpp
 	scheduler.cpp
 	versionbitsinfo.cpp
 	warnings.cpp
 )
 
 target_link_libraries(common util secp256k1)
 
 # script library
 add_library(script
 	script/bitfield.cpp
 	script/descriptor.cpp
 	script/interpreter.cpp
 	script/ismine.cpp
 	script/script.cpp
 	script/script_error.cpp
 	script/sigencoding.cpp
 	script/sign.cpp
 	script/standard.cpp
 )
 
 target_link_libraries(script common)
 
 # libbitcoinconsensus
 add_library(bitcoinconsensus
 	arith_uint256.cpp
 	hash.cpp
 	primitives/transaction.cpp
 	pubkey.cpp
 	uint256.cpp
 	util/strencodings.cpp
 )
 
 target_link_libraries(bitcoinconsensus script)
 
 include(InstallationHelper)
 if(BUILD_LIBBITCOINCONSENSUS)
 	target_compile_definitions(bitcoinconsensus
 		PUBLIC
 			BUILD_BITCOIN_INTERNAL
 			HAVE_CONSENSUS_LIB
 	)
 
 	install_shared_library(bitcoinconsensus
 		script/bitcoinconsensus.cpp
 		PUBLIC_HEADER script/bitcoinconsensus.h
 	)
 endif()
 
 # Bitcoin server facilities
 add_library(server
 	addrdb.cpp
 	addrman.cpp
 	avalanche.cpp
 	banman.cpp
 	bloom.cpp
 	blockencodings.cpp
 	blockfilter.cpp
 	chain.cpp
 	checkpoints.cpp
 	config.cpp
 	consensus/activation.cpp
 	consensus/tx_verify.cpp
 	dbwrapper.cpp
 	flatfile.cpp
 	globals.cpp
 	httprpc.cpp
 	httpserver.cpp
 	index/base.cpp
 	index/txindex.cpp
 	init.cpp
 	interfaces/chain.cpp
 	interfaces/handler.cpp
 	interfaces/node.cpp
 	merkleblock.cpp
 	miner.cpp
 	minerfund.cpp
 	net.cpp
 	net_processing.cpp
+	node/coin.cpp
 	node/transaction.cpp
 	noui.cpp
 	outputtype.cpp
 	policy/fees.cpp
 	policy/mempool.cpp
 	policy/policy.cpp
 	pow.cpp
 	rest.cpp
 	rpc/abc.cpp
 	rpc/avalanche.cpp
 	rpc/blockchain.cpp
 	rpc/command.cpp
 	rpc/jsonrpcrequest.cpp
 	rpc/mining.cpp
 	rpc/misc.cpp
 	rpc/net.cpp
 	rpc/rawtransaction.cpp
 	rpc/server.cpp
 	script/scriptcache.cpp
 	script/sigcache.cpp
 	shutdown.cpp
 	timedata.cpp
 	torcontrol.cpp
 	txdb.cpp
 	txmempool.cpp
 	ui_interface.cpp
 	validation.cpp
 	validationinterface.cpp
 	versionbits.cpp
 )
 
 target_include_directories(server PRIVATE leveldb/helpers/memenv)
 
 # This require libevent
 set(EVENT_MIN_VERSION 2.0.22)
 find_package(Event ${EVENT_MIN_VERSION} REQUIRED COMPONENTS event)
 
 target_link_libraries(server
 	Event::event
 	bitcoinconsensus
 	leveldb
 	memenv
 )
 
 if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
 	find_package(Event ${EVENT_MIN_VERSION} REQUIRED COMPONENTS pthreads)
 	target_link_libraries(server Event::pthreads)
 endif()
 
 if(ENABLE_UPNP)
 	find_package(MiniUPnPc 1.5 REQUIRED)
 	target_link_libraries(server MiniUPnPc::miniupnpc)
 
 	if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
 		# TODO: check if we are really using a static library. Assume this is
 		# the one from the depends for now since the native windows build is not
 		# supported.
 		target_compile_definitions(server
 			PUBLIC -DSTATICLIB
 			PUBLIC -DMINIUPNP_STATICLIB
 		)
 	endif()
 endif()
 
 # Test suite.
 add_subdirectory(test)
 
 # Benchmark suite.
 add_subdirectory(bench)
 
 include(BinaryTest)
 
 # Wallet
 if(BUILD_BITCOIN_WALLET)
 	add_subdirectory(wallet)
 	target_link_libraries(server wallet)
 	# There is a circular dependency between wallet and server, see:
 	# https://github.com/bitcoin/bitcoin/pull/14437#discussion_r226237048
 	target_link_libraries(wallet server)
 
 	# bitcoin-wallet
 	add_executable(bitcoin-wallet bitcoin-wallet.cpp)
 	if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
 		target_sources(bitcoin-wallet PRIVATE bitcoin-wallet-res.rc)
 	endif()
 
 	target_link_libraries(bitcoin-wallet wallet-tool server common util)
 
 	add_to_symbols_check(bitcoin-wallet)
 	add_to_security_check(bitcoin-wallet)
 
 	install_target(bitcoin-wallet)
 else()
 	target_sources(server PRIVATE dummywallet.cpp)
 endif()
 
 # ZeroMQ
 if(BUILD_BITCOIN_ZMQ)
 	add_subdirectory(zmq)
 	target_link_libraries(server zmq)
 endif()
 
 # RPC client support
 add_library(rpcclient rpc/client.cpp)
 target_link_libraries(rpcclient univalue util)
 
 # bitcoin-seeder
 if(BUILD_BITCOIN_SEEDER)
 	add_subdirectory(seeder)
 endif()
 
 # bitcoin-cli
 if(BUILD_BITCOIN_CLI)
 	add_executable(bitcoin-cli bitcoin-cli.cpp)
 	if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
 		target_sources(bitcoin-cli PRIVATE bitcoin-cli-res.rc)
 	endif()
 
 	target_link_libraries(bitcoin-cli common rpcclient Event::event)
 
 	add_to_symbols_check(bitcoin-cli)
 	add_to_security_check(bitcoin-cli)
 
 	install_target(bitcoin-cli)
 endif()
 
 # bitcoin-tx
 if(BUILD_BITCOIN_TX)
 	add_executable(bitcoin-tx bitcoin-tx.cpp)
 	if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
 		target_sources(bitcoin-tx PRIVATE bitcoin-tx-res.rc)
 	endif()
 
 	target_link_libraries(bitcoin-tx bitcoinconsensus)
 
 	add_to_symbols_check(bitcoin-tx)
 	add_to_security_check(bitcoin-tx)
 
 	install_target(bitcoin-tx)
 endif()
 
 # bitcoind
 add_executable(bitcoind bitcoind.cpp)
 target_link_libraries(bitcoind server)
 if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
 	target_sources(bitcoind PRIVATE bitcoind-res.rc)
 endif()
 add_to_symbols_check(bitcoind)
 add_to_security_check(bitcoind)
 
 install_target(bitcoind)
 
 # Bitcoin-qt
 if(BUILD_BITCOIN_QT)
 	add_subdirectory(qt)
 endif()
diff --git a/src/Makefile.am b/src/Makefile.am
index 93fa0f954d..821fb647f7 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,773 +1,775 @@
 # Copyright (c) 2013-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 DIST_SUBDIRS = secp256k1 univalue
 
 AM_LDFLAGS = $(PTHREAD_CFLAGS) $(LIBTOOL_LDFLAGS) $(HARDENED_LDFLAGS) $(GPROF_LDFLAGS) $(SANITIZER_LDFLAGS)
 AM_CXXFLAGS = $(DEBUG_CXXFLAGS) $(HARDENED_CXXFLAGS) $(WARN_CXXFLAGS) $(NOWARN_CXXFLAGS) $(ERROR_CXXFLAGS) $(GPROF_CXXFLAGS) $(SANITIZER_CXXFLAGS)
 AM_CPPFLAGS = $(DEBUG_CPPFLAGS) $(HARDENED_CPPFLAGS)
 AM_LIBTOOLFLAGS = --preserve-dup-deps
 EXTRA_LIBRARIES =
 
 if EMBEDDED_UNIVALUE
 LIBUNIVALUE = univalue/libunivalue.la
 
 $(LIBUNIVALUE): $(wildcard univalue/lib/*) $(wildcard univalue/include/*)
 	$(AM_V_at)$(MAKE) $(AM_MAKEFLAGS) -C $(@D) $(@F)
 else
 LIBUNIVALUE = $(UNIVALUE_LIBS)
 endif
 
 BITCOIN_INCLUDES=-I$(builddir) $(BDB_CPPFLAGS) $(BOOST_CPPFLAGS) $(LEVELDB_CPPFLAGS) $(CRYPTO_CFLAGS) $(SSL_CFLAGS)
 
 BITCOIN_INCLUDES += -I$(srcdir)/secp256k1/include
 BITCOIN_INCLUDES += $(UNIVALUE_CFLAGS)
 
 BITCOIN_SEEDER_INCLUDES = -I$(srcdir)/seeder
 BITCOIN_SEEDER_INCLUDES += $(BITCOIN_INCLUDES)
 
 LIBBITCOIN_SERVER=libbitcoin_server.a
 LIBBITCOIN_COMMON=libbitcoin_common.a
 LIBBITCOIN_CONSENSUS=libbitcoin_consensus.a
 LIBBITCOIN_CLI=libbitcoin_cli.a
 LIBBITCOIN_UTIL=libbitcoin_util.a
 LIBBITCOIN_CRYPTO_BASE=crypto/libbitcoin_crypto_base.a
 LIBBITCOINQT=qt/libbitcoinqt.a
 LIBSECP256K1=secp256k1/libsecp256k1.la
 
 if ENABLE_ZMQ
 LIBBITCOIN_ZMQ=libbitcoin_zmq.a
 endif
 if BUILD_BITCOIN_LIBS
 LIBBITCOINCONSENSUS=libbitcoinconsensus.la
 endif
 if BUILD_BITCOIN_SEEDER
 LIBBITCOIN_SEEDER=libbitcoin_seeder.a
 endif
 if ENABLE_WALLET
 LIBBITCOIN_WALLET=libbitcoin_wallet.a
 LIBBITCOIN_WALLET_TOOL=libbitcoin_wallet_tool.a
 endif
 
 LIBBITCOIN_CRYPTO= $(LIBBITCOIN_CRYPTO_BASE)
 if ENABLE_SSE41
 LIBBITCOIN_CRYPTO_SSE41 = crypto/libbitcoin_crypto_sse41.a
 LIBBITCOIN_CRYPTO += $(LIBBITCOIN_CRYPTO_SSE41)
 endif
 if ENABLE_AVX2
 LIBBITCOIN_CRYPTO_AVX2 = crypto/libbitcoin_crypto_avx2.a
 LIBBITCOIN_CRYPTO += $(LIBBITCOIN_CRYPTO_AVX2)
 endif
 if ENABLE_SHANI
 LIBBITCOIN_CRYPTO_SHANI = crypto/libbitcoin_crypto_shani.a
 LIBBITCOIN_CRYPTO += $(LIBBITCOIN_CRYPTO_SHANI)
 endif
 
 $(LIBSECP256K1): $(wildcard secp256k1/src/*) $(wildcard secp256k1/include/*)
 	$(AM_V_at)$(MAKE) $(AM_MAKEFLAGS) -C $(@D) $(@F)
 
 # Make is not made aware of per-object dependencies to avoid limiting building parallelization
 # But to build the less dependent modules first, we manually select their order here:
 EXTRA_LIBRARIES += \
   $(LIBBITCOIN_CRYPTO) \
   $(LIBBITCOIN_UTIL) \
   $(LIBBITCOIN_COMMON) \
   $(LIBBITCOIN_CONSENSUS) \
   $(LIBBITCOIN_SERVER) \
   $(LIBBITCOIN_CLI) \
   $(LIBBITCOIN_SEEDER) \
   $(LIBBITCOIN_WALLET) \
   $(LIBBITCOIN_WALLET_TOOL) \
   $(LIBBITCOIN_ZMQ)
 
 lib_LTLIBRARIES = $(LIBBITCOINCONSENSUS)
 
 bin_PROGRAMS =
 noinst_PROGRAMS =
 TESTS =
 BENCHMARKS =
 
 if BUILD_BITCOIND
   bin_PROGRAMS += bitcoind
 endif
 
 if BUILD_BITCOIN_SEEDER
   bin_PROGRAMS += bitcoin-seeder
 endif
 
 if BUILD_BITCOIN_CLI
   bin_PROGRAMS += bitcoin-cli
 endif
 if BUILD_BITCOIN_TX
   bin_PROGRAMS += bitcoin-tx
 endif
 if ENABLE_WALLET
 if BUILD_BITCOIN_WALLET
   bin_PROGRAMS += bitcoin-wallet
 endif
 endif
 
 .PHONY: FORCE check-symbols check-security
 # bitcoin core #
 BITCOIN_CORE_H = \
   addrdb.h \
   addrman.h \
   attributes.h \
   avalanche.h \
   banman.h \
   base58.h \
   bloom.h \
   blockencodings.h \
   blockfileinfo.h \
   blockfilter.h \
   blockindexworkcomparator.h \
   blockstatus.h \
   blockvalidity.h \
   cashaddr.h \
   cashaddrenc.h \
   chain.h \
   chainparams.h \
   chainparamsbase.h \
   chainparamsconstants.h \
   chainparamsseeds.h \
   checkpoints.h \
   checkqueue.h \
   clientversion.h \
   coins.h \
   compat.h \
   compat/assumptions.h \
   compat/byteswap.h \
   compat/endian.h \
   compat/sanity.h \
   compat/setenv.h \
   compressor.h \
   config.h \
   consensus/activation.h \
   consensus/consensus.h \
   consensus/tx_verify.h \
   core_io.h \
   core_memusage.h \
   cuckoocache.h \
   eventloop.h \
   flatfile.h \
   fs.h \
   globals.h \
   httprpc.h \
   httpserver.h \
   index/base.h \
   index/txindex.h \
   indirectmap.h \
   init.h \
   interfaces/chain.h \
   interfaces/handler.h \
   interfaces/node.h \
   interfaces/wallet.h \
   key.h \
   key_io.h \
   keystore.h \
   dbwrapper.h \
   limitedmap.h \
   logging.h \
   memusage.h \
   merkleblock.h \
   miner.h \
   minerfund.h \
   net.h \
   net_processing.h \
   netaddress.h \
   netbase.h \
   netmessagemaker.h \
+  node/coin.h \
   node/transaction.h \
   noui.h \
   optional.h \
   outputtype.h \
   policy/fees.h \
   policy/mempool.h \
   policy/policy.h \
   pow.h \
   protocol.h \
   psbt.h \
   radix.h \
   random.h \
   rcu.h \
   reverse_iterator.h \
   reverselock.h \
   rpc/blockchain.h \
   rpc/client.h \
   rpc/command.h \
   rpc/jsonrpcrequest.h \
   rpc/mining.h \
   rpc/protocol.h \
   rpc/rawtransaction.h \
   rpc/server.h \
   rpc/register.h \
   rpc/util.h \
   rwcollection.h \
   scheduler.h \
   script/descriptor.h \
   script/ismine.h \
   script/scriptcache.h \
   script/sigcache.h \
   script/sign.h \
   script/standard.h \
   shutdown.h \
   streams.h \
   support/allocators/secure.h \
   support/allocators/zeroafterfree.h \
   support/cleanse.h \
   support/events.h \
   support/lockedpool.h \
   sync.h \
   threadsafety.h \
   threadinterrupt.h \
   timedata.h \
   torcontrol.h \
   txdb.h \
   txmempool.h \
   ui_interface.h \
   undo.h \
   util/bitmanip.h \
   util/bytevectorhash.h \
   util/check.h \
   util/macros.h \
   util/moneystr.h \
   util/system.h \
   util/settings.h \
   util/threadnames.h \
   util/time.h \
   validation.h \
   validationinterface.h \
   versionbits.h \
   versionbitsinfo.h \
   walletinitinterface.h \
   wallet/coincontrol.h \
   wallet/coinselection.h \
   wallet/crypter.h \
   wallet/db.h \
   wallet/rpcdump.h \
   wallet/fees.h \
   wallet/psbtwallet.h \
   wallet/rpcwallet.h \
   wallet/wallet.h \
   wallet/walletdb.h \
   wallet/wallettool.h \
   wallet/walletutil.h \
   warnings.h \
   zmq/zmqabstractnotifier.h \
   zmq/zmqconfig.h\
   zmq/zmqnotificationinterface.h \
   zmq/zmqpublishnotifier.h \
   zmq/zmqrpc.h
 
 
 obj/build.h: FORCE
 	@$(MKDIR_P) "$(builddir)/obj"
 	@$(top_srcdir)/share/genbuild.sh "$(abs_top_builddir)/src/obj/build.h" \
 	  "$(abs_top_srcdir)"
 libbitcoin_util_a-clientversion.$(OBJEXT): obj/build.h
 
 # server: shared between bitcoind and bitcoin-qt
 libbitcoin_server_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) $(MINIUPNPC_CPPFLAGS) $(EVENT_CFLAGS) $(EVENT_PTHREADS_CFLAGS)
 libbitcoin_server_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 libbitcoin_server_a_SOURCES = \
   addrdb.cpp \
   addrman.cpp \
   avalanche.cpp \
   banman.cpp \
   bloom.cpp \
   blockencodings.cpp \
   blockfilter.cpp \
   chain.cpp \
   checkpoints.cpp \
   config.cpp \
   consensus/activation.cpp \
   consensus/tx_verify.cpp \
   flatfile.cpp \
   globals.cpp \
   httprpc.cpp \
   httpserver.cpp \
   index/base.cpp \
   index/txindex.cpp \
   init.cpp \
   interfaces/chain.cpp \
   interfaces/handler.cpp \
   interfaces/node.cpp \
   dbwrapper.cpp \
   merkleblock.cpp \
   miner.cpp \
   minerfund.cpp \
   net.cpp \
   net_processing.cpp \
+  node/coin.cpp \
   node/transaction.cpp \
   noui.cpp \
   outputtype.cpp \
   policy/fees.cpp \
   policy/mempool.cpp \
   policy/policy.cpp \
   pow.cpp \
   rest.cpp \
   rpc/abc.cpp \
   rpc/avalanche.cpp \
   rpc/blockchain.cpp \
   rpc/command.cpp \
   rpc/jsonrpcrequest.cpp \
   rpc/mining.cpp \
   rpc/misc.cpp \
   rpc/net.cpp \
   rpc/rawtransaction.cpp \
   rpc/server.cpp \
   script/scriptcache.cpp \
   script/sigcache.cpp \
   shutdown.cpp \
   timedata.cpp \
   torcontrol.cpp \
   txdb.cpp \
   txmempool.cpp \
   ui_interface.cpp \
   validation.cpp \
   validationinterface.cpp \
   versionbits.cpp \
   $(BITCOIN_CORE_H)
 
 if !ENABLE_WALLET
 libbitcoin_server_a_SOURCES += dummywallet.cpp
 endif
 
 if ENABLE_ZMQ
 libbitcoin_zmq_a_CPPFLAGS = $(BITCOIN_INCLUDES) $(ZMQ_CFLAGS)
 libbitcoin_zmq_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 libbitcoin_zmq_a_SOURCES = \
   zmq/zmqabstractnotifier.cpp \
   zmq/zmqnotificationinterface.cpp \
   zmq/zmqpublishnotifier.cpp \
   zmq/zmqrpc.cpp
 endif
 
 
 # wallet: shared between bitcoind and bitcoin-qt, but only linked
 # when wallet enabled
 libbitcoin_wallet_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
 libbitcoin_wallet_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 libbitcoin_wallet_a_SOURCES = \
   interfaces/wallet.cpp \
   wallet/coincontrol.cpp \
   wallet/crypter.cpp \
   wallet/coinselection.cpp \
   wallet/db.cpp \
   wallet/fees.cpp \
   wallet/init.cpp \
   wallet/psbtwallet.cpp \
   wallet/rpcdump.cpp \
   wallet/rpcwallet.cpp \
   wallet/wallet.cpp \
   wallet/walletdb.cpp \
   wallet/walletutil.cpp \
   $(BITCOIN_CORE_H)
 
 libbitcoin_wallet_tool_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
 libbitcoin_wallet_tool_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 libbitcoin_wallet_tool_a_SOURCES = \
   wallet/wallettool.cpp \
   $(BITCOIN_CORE_H)
 
 # crypto primitives library
 crypto_libbitcoin_crypto_base_a_CPPFLAGS = $(AM_CPPFLAGS)
 crypto_libbitcoin_crypto_base_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 crypto_libbitcoin_crypto_base_a_SOURCES = \
   crypto/aes.cpp \
   crypto/aes.h \
   crypto/chacha20.h \
   crypto/chacha20.cpp \
   crypto/common.h \
   crypto/hmac_sha256.cpp \
   crypto/hmac_sha256.h \
   crypto/hmac_sha512.cpp \
   crypto/hmac_sha512.h \
   crypto/ripemd160.cpp \
   crypto/ripemd160.h \
   crypto/sha1.cpp \
   crypto/sha1.h \
   crypto/sha256.cpp \
   crypto/sha256.h \
   crypto/sha512.cpp \
   crypto/sha512.h \
   crypto/siphash.cpp \
   crypto/siphash.h
 
 if USE_ASM
 crypto_libbitcoin_crypto_base_a_SOURCES += crypto/sha256_sse4.cpp
 endif
 
 crypto_libbitcoin_crypto_sse41_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 crypto_libbitcoin_crypto_sse41_a_CPPFLAGS = $(AM_CPPFLAGS)
 crypto_libbitcoin_crypto_sse41_a_CXXFLAGS += $(SSE41_CXXFLAGS)
 crypto_libbitcoin_crypto_sse41_a_CPPFLAGS += -DENABLE_SSE41
 crypto_libbitcoin_crypto_sse41_a_SOURCES = crypto/sha256_sse41.cpp
 
 crypto_libbitcoin_crypto_avx2_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 crypto_libbitcoin_crypto_avx2_a_CPPFLAGS = $(AM_CPPFLAGS)
 crypto_libbitcoin_crypto_avx2_a_CXXFLAGS += $(AVX2_CXXFLAGS)
 crypto_libbitcoin_crypto_avx2_a_CPPFLAGS += -DENABLE_AVX2
 crypto_libbitcoin_crypto_avx2_a_SOURCES = crypto/sha256_avx2.cpp
 
 crypto_libbitcoin_crypto_shani_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 crypto_libbitcoin_crypto_shani_a_CPPFLAGS = $(AM_CPPFLAGS)
 crypto_libbitcoin_crypto_shani_a_CXXFLAGS += $(SHANI_CXXFLAGS)
 crypto_libbitcoin_crypto_shani_a_CPPFLAGS += -DENABLE_SHANI
 crypto_libbitcoin_crypto_shani_a_SOURCES = crypto/sha256_shani.cpp
 
 # consensus: shared between all executables that validate any consensus rules.
 libbitcoin_consensus_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
 libbitcoin_consensus_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 libbitcoin_consensus_a_SOURCES = \
   amount.h \
   arith_uint256.cpp \
   arith_uint256.h \
   consensus/merkle.cpp \
   consensus/merkle.h \
   consensus/params.h \
   consensus/validation.h \
   feerate.h \
   hash.cpp \
   hash.h \
   prevector.h \
   primitives/block.cpp \
   primitives/block.h \
   primitives/transaction.cpp \
   primitives/transaction.h \
   primitives/txid.h \
   pubkey.cpp \
   pubkey.h \
   script/bitcoinconsensus.cpp \
   script/bitfield.cpp \
   script/bitfield.h \
   script/sighashtype.h \
   script/interpreter.cpp \
   script/interpreter.h \
   script/script.cpp \
   script/script.h \
   script/script_error.cpp \
   script/script_error.h \
   script/script_flags.h \
   script/script_metrics.h \
   script/sigencoding.cpp \
   script/sigencoding.h \
   serialize.h \
   span.h \
   tinyformat.h \
   uint256.cpp \
   uint256.h \
   util/strencodings.cpp \
   util/strencodings.h \
   version.h
 
 # common: shared between bitcoind, and bitcoin-qt and non-server tools
 libbitcoin_common_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
 libbitcoin_common_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 libbitcoin_common_a_SOURCES = \
   amount.cpp \
   base58.cpp \
   cashaddr.cpp \
   cashaddrenc.cpp \
   chainparams.cpp \
   config.cpp \
   coins.cpp \
   compressor.cpp \
   eventloop.cpp \
   feerate.cpp \
   globals.cpp \
   core_read.cpp \
   core_write.cpp \
   key.cpp \
   key_io.cpp \
   keystore.cpp \
   netaddress.cpp \
   netbase.cpp \
   protocol.cpp \
   psbt.cpp \
   scheduler.cpp \
   script/descriptor.cpp \
   script/ismine.cpp \
   script/sign.cpp \
   script/standard.cpp \
   versionbitsinfo.cpp \
   warnings.cpp \
   $(BITCOIN_CORE_H)
 
 # util: shared between all executables.
 # This library *must* be included to make sure that the glibc
 # backward-compatibility objects and their sanity checks are linked.
 libbitcoin_util_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
 libbitcoin_util_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 libbitcoin_util_a_SOURCES = \
   support/lockedpool.cpp \
   chainparamsbase.cpp \
   clientversion.cpp \
   compat/glibc_sanity.cpp \
   compat/glibcxx_sanity.cpp \
   compat/strnlen.cpp \
   fs.cpp \
   logging.cpp \
   random.cpp \
   rcu.cpp \
   rpc/protocol.cpp \
   rpc/util.cpp \
   support/cleanse.cpp \
   sync.cpp \
   threadinterrupt.cpp \
   uint256.cpp \
   uint256.h \
   util/system.cpp \
   util/moneystr.cpp \
   util/settings.cpp \
   util/strencodings.cpp \
   util/threadnames.cpp \
   util/time.cpp \
   util/bytevectorhash.cpp \
   $(BITCOIN_CORE_H)
 
 if GLIBC_BACK_COMPAT
 libbitcoin_util_a_SOURCES += compat/glibc_compat.cpp
 AM_LDFLAGS += $(COMPAT_LDFLAGS)
 endif
 
 # cli: shared between bitcoin-cli and bitcoin-qt
 libbitcoin_cli_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
 libbitcoin_cli_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 libbitcoin_cli_a_SOURCES = \
   rpc/client.cpp \
   $(BITCOIN_CORE_H)
 
 # seeder library
 libbitcoin_seeder_a_CPPFLAGS = $(AM_CPPFLAGS) $(PIE_FLAGS) $(BITCOIN_SEEDER_INCLUDES)
 libbitcoin_seeder_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 libbitcoin_seeder_a_SOURCES = \
   seeder/bitcoin.cpp \
   seeder/bitcoin.h \
   seeder/db.cpp \
   seeder/db.h \
   seeder/dns.cpp \
   seeder/dns.h \
   seeder/util.h
 
 nodist_libbitcoin_util_a_SOURCES = $(srcdir)/obj/build.h
 #
 
 # bitcoind binary #
 bitcoind_SOURCES = bitcoind.cpp
 bitcoind_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
 bitcoind_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 bitcoind_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
 
 if TARGET_WINDOWS
 bitcoind_SOURCES += bitcoind-res.rc
 endif
 
 bitcoind_LDADD = \
   $(LIBBITCOIN_SERVER) \
   $(LIBBITCOIN_WALLET) \
   $(LIBBITCOIN_SERVER) \
   $(LIBBITCOIN_COMMON) \
   $(LIBUNIVALUE) \
   $(LIBBITCOIN_UTIL) \
   $(LIBBITCOIN_ZMQ) \
   $(LIBBITCOIN_CONSENSUS) \
   $(LIBBITCOIN_CRYPTO) \
   $(LIBLEVELDB) \
   $(LIBLEVELDB_SSE42) \
   $(LIBMEMENV) \
   $(LIBSECP256K1)
 
 bitcoind_LDADD += $(BOOST_LIBS) $(BDB_LIBS) $(SSL_LIBS) $(CRYPTO_LIBS) $(MINIUPNPC_LIBS) $(EVENT_PTHREADS_LIBS) $(EVENT_LIBS) $(ZMQ_LIBS)
 
 # bitcoin-cli binary #
 bitcoin_cli_SOURCES = bitcoin-cli.cpp
 bitcoin_cli_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) $(EVENT_CFLAGS)
 bitcoin_cli_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 bitcoin_cli_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
 
 if TARGET_WINDOWS
 bitcoin_cli_SOURCES += bitcoin-cli-res.rc
 endif
 
 bitcoin_cli_LDADD = \
   $(LIBBITCOIN_CLI) \
   $(LIBUNIVALUE) \
   $(LIBBITCOIN_UTIL) \
   $(LIBBITCOIN_CRYPTO)
 
 bitcoin_cli_LDADD += $(BOOST_LIBS) $(SSL_LIBS) $(CRYPTO_LIBS) $(EVENT_LIBS)
 #
 
 # bitcoin-seeder binary #
 bitcoin_seeder_SOURCES = seeder/main.cpp
 bitcoin_seeder_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_SEEDER_INCLUDES)
 bitcoin_seeder_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 bitcoin_seeder_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
 
 bitcoin_seeder_LDADD = \
   $(LIBBITCOIN_SEEDER) \
   $(LIBBITCOIN_COMMON) \
   $(LIBBITCOIN_UTIL) \
   $(LIBUNIVALUE) \
   $(LIBBITCOIN_CRYPTO) \
   $(LIBBITCOIN_CONSENSUS)
 
 bitcoin_seeder_LDADD += $(BOOST_LIBS) $(CRYPTO_LIBS)
 #
 
 # bitcoin-tx binary #
 bitcoin_tx_SOURCES = bitcoin-tx.cpp
 bitcoin_tx_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
 bitcoin_tx_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 bitcoin_tx_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
 
 if TARGET_WINDOWS
 bitcoin_tx_SOURCES += bitcoin-tx-res.rc
 endif
 
 bitcoin_tx_LDADD = \
   $(LIBUNIVALUE) \
   $(LIBBITCOIN_COMMON) \
   $(LIBBITCOIN_UTIL) \
   $(LIBBITCOIN_CONSENSUS) \
   $(LIBBITCOIN_CRYPTO) \
   $(LIBSECP256K1)
 
 bitcoin_tx_LDADD += $(BOOST_LIBS) $(CRYPTO_LIBS)
 #
 
 # bitcoin-wallet binary #
 bitcoin_wallet_SOURCES = bitcoin-wallet.cpp
 bitcoin_wallet_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
 bitcoin_wallet_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 bitcoin_wallet_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
 
 if TARGET_WINDOWS
 bitcoin_wallet_SOURCES += bitcoin-wallet-res.rc
 endif
 
 bitcoin_wallet_LDADD = \
   $(LIBBITCOIN_WALLET_TOOL) \
   $(LIBBITCOIN_WALLET) \
   $(LIBBITCOIN_SERVER) \
   $(LIBBITCOIN_COMMON) \
   $(LIBBITCOIN_CONSENSUS) \
   $(LIBBITCOIN_UTIL) \
   $(LIBBITCOIN_CRYPTO) \
   $(LIBBITCOIN_ZMQ) \
   $(LIBLEVELDB) \
   $(LIBLEVELDB_SSE42) \
   $(LIBMEMENV) \
   $(LIBSECP256K1) \
   $(LIBUNIVALUE)
 
 bitcoin_wallet_LDADD += $(BOOST_LIBS) $(BDB_LIBS) $(CRYPTO_LIBS) $(EVENT_PTHREADS_LIBS) $(EVENT_LIBS) $(MINIUPNPC_LIBS) $(ZMQ_LIBS)
 #
 
 # bitcoinconsensus library #
 if BUILD_BITCOIN_LIBS
 include_HEADERS = script/bitcoinconsensus.h
 libbitcoinconsensus_la_SOURCES = $(crypto_libbitcoin_crypto_base_a_SOURCES) $(libbitcoin_consensus_a_SOURCES)
 
 if GLIBC_BACK_COMPAT
   libbitcoinconsensus_la_SOURCES += compat/glibc_compat.cpp
 endif
 
 libbitcoinconsensus_la_LDFLAGS = $(AM_LDFLAGS) -no-undefined $(RELDFLAGS)
 libbitcoinconsensus_la_LIBADD = $(LIBSECP256K1)
 libbitcoinconsensus_la_CPPFLAGS = $(AM_CPPFLAGS) -I$(builddir)/obj -I$(srcdir)/secp256k1/include -DBUILD_BITCOIN_INTERNAL
 libbitcoinconsensus_la_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 
 endif
 #
 
 CTAES_DIST =  crypto/ctaes/bench.c
 CTAES_DIST += crypto/ctaes/ctaes.c
 CTAES_DIST += crypto/ctaes/ctaes.h
 CTAES_DIST += crypto/ctaes/README.md
 CTAES_DIST += crypto/ctaes/test.c
 
 CLEANFILES = $(EXTRA_LIBRARIES)
 
 CLEANFILES += *.gcda *.gcno
 CLEANFILES += compat/*.gcda compat/*.gcno
 CLEANFILES += consensus/*.gcda consensus/*.gcno
 CLEANFILES += crypto/*.gcda crypto/*.gcno
 CLEANFILES += policy/*.gcda policy/*.gcno
 CLEANFILES += primitives/*.gcda primitives/*.gcno
 CLEANFILES += script/*.gcda script/*.gcno
 CLEANFILES += support/*.gcda support/*.gcno
 CLEANFILES += univalue/*.gcda univalue/*.gcno
 CLEANFILES += wallet/*.gcda wallet/*.gcno
 CLEANFILES += wallet/test/*.gcda wallet/test/*.gcno
 CLEANFILES += zmq/*.gcda zmq/*.gcno
 CLEANFILES += obj/build.h
 
 EXTRA_DIST = $(CTAES_DIST)
 
 
 config/bitcoin-config.h: config/stamp-h1
 	@$(MAKE) -C $(top_builddir) $(subdir)/$(@)
 config/stamp-h1: $(top_srcdir)/$(subdir)/config/bitcoin-config.h.in $(top_builddir)/config.status
 	$(AM_V_at)$(MAKE) -C $(top_builddir) $(subdir)/$(@)
 $(top_srcdir)/$(subdir)/config/bitcoin-config.h.in:  $(am__configure_deps)
 	$(AM_V_at)$(MAKE) -C $(top_srcdir) $(subdir)/config/bitcoin-config.h.in
 
 clean-local:
 	-$(MAKE) -C secp256k1 clean
 	-$(MAKE) -C univalue clean
 	-rm -f leveldb/*/*.gcda leveldb/*/*.gcno leveldb/helpers/memenv/*.gcda leveldb/helpers/memenv/*.gcno
 	-rm -rf test/__pycache__
 
 .rc.o:
 	@test -f $(WINDRES)
 	## FIXME: How to get the appropriate modulename_CPPFLAGS in here?
 	$(AM_V_GEN) $(WINDRES) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(CPPFLAGS) -DWINDRES_PREPROC -i $< -o $@
 
 .mm.o:
 	$(AM_V_CXX) $(OBJCXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
 	  $(CPPFLAGS) $(AM_CXXFLAGS) $(QT_INCLUDES) $(AM_CXXFLAGS) $(PIE_FLAGS) $(CXXFLAGS) -c -o $@ $<
 
 check-symbols: $(bin_PROGRAMS)
 if GLIBC_BACK_COMPAT
 	@echo "Checking glibc back compat..."
 	$(AM_V_at) READELF=$(READELF) CPPFILT=$(CPPFILT) $(PYTHON) $(top_srcdir)/contrib/devtools/symbol-check.py < $(bin_PROGRAMS)
 endif
 
 check-security: $(bin_PROGRAMS)
 if HARDEN
 	@echo "Checking binary security..."
 	$(AM_V_at) READELF=$(READELF) OBJDUMP=$(OBJDUMP) $(PYTHON) $(top_srcdir)/contrib/devtools/security-check.py < $(bin_PROGRAMS)
 endif
 
 if ENABLE_BIP70
 %.pb.cc %.pb.h: %.proto
 	@test -f $(PROTOC)
 	$(AM_V_GEN) $(PROTOC) --cpp_out=$(@D) --proto_path=$(<D) $<
 endif
 
 if EMBEDDED_LEVELDB
 include Makefile.leveldb.include
 endif
 
 if ENABLE_TESTS
 include Makefile.test.include
 endif
 
 if ENABLE_BENCH
 include Makefile.bench.include
 endif
 
 if ENABLE_QT
 include Makefile.qt.include
 endif
 
 if ENABLE_QT_TESTS
 include Makefile.qttest.include
 endif
 
 if ENABLE_SEEDER_TESTS
 include Makefile.seedertest.include
 endif
diff --git a/src/interfaces/chain.cpp b/src/interfaces/chain.cpp
index 95952350f0..bb7c17df80 100644
--- a/src/interfaces/chain.cpp
+++ b/src/interfaces/chain.cpp
@@ -1,379 +1,383 @@
 // Copyright (c) 2018 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <interfaces/chain.h>
 
 #include <chain.h>
 #include <chainparams.h>
 #include <interfaces/handler.h>
 #include <interfaces/wallet.h>
 #include <net.h>
+#include <node/coin.h>
 #include <policy/mempool.h>
 #include <primitives/block.h>
 #include <primitives/blockhash.h>
 #include <primitives/transaction.h>
 #include <protocol.h>
 #include <rpc/protocol.h>
 #include <rpc/server.h>
 #include <sync.h>
 #include <threadsafety.h>
 #include <timedata.h>
 #include <txmempool.h>
 #include <ui_interface.h>
 #include <univalue.h>
 #include <util/system.h>
 #include <validation.h>
 #include <validationinterface.h>
 
 #include <memory>
 #include <utility>
 
 namespace interfaces {
 namespace {
 
     class LockImpl : public Chain::Lock {
         Optional<int> getHeight() override {
             int height = ::ChainActive().Height();
             if (height >= 0) {
                 return height;
             }
             return nullopt;
         }
         Optional<int> getBlockHeight(const BlockHash &hash) override {
             CBlockIndex *block = LookupBlockIndex(hash);
             if (block && ::ChainActive().Contains(block)) {
                 return block->nHeight;
             }
             return nullopt;
         }
         int getBlockDepth(const BlockHash &hash) override {
             const Optional<int> tip_height = getHeight();
             const Optional<int> height = getBlockHeight(hash);
             return tip_height && height ? *tip_height - *height + 1 : 0;
         }
         BlockHash getBlockHash(int height) override {
             CBlockIndex *block = ::ChainActive()[height];
             assert(block != nullptr);
             return block->GetBlockHash();
         }
         int64_t getBlockTime(int height) override {
             CBlockIndex *block = ::ChainActive()[height];
             assert(block != nullptr);
             return block->GetBlockTime();
         }
         int64_t getBlockMedianTimePast(int height) override {
             CBlockIndex *block = ::ChainActive()[height];
             assert(block != nullptr);
             return block->GetMedianTimePast();
         }
         bool haveBlockOnDisk(int height) override {
             CBlockIndex *block = ::ChainActive()[height];
             return block && (block->nStatus.hasData() != 0) && block->nTx > 0;
         }
         Optional<int> findFirstBlockWithTime(int64_t time,
                                              BlockHash *hash) override {
             CBlockIndex *block = ::ChainActive().FindEarliestAtLeast(time);
             if (block) {
                 if (hash) {
                     *hash = block->GetBlockHash();
                 }
                 return block->nHeight;
             }
             return nullopt;
         }
         Optional<int> findFirstBlockWithTimeAndHeight(int64_t time,
                                                       int height) override {
             // TODO: Could update CChain::FindEarliestAtLeast() to take a height
             // parameter and use it with std::lower_bound() to make this
             // implementation more efficient and allow combining
             // findFirstBlockWithTime and findFirstBlockWithTimeAndHeight into
             // one method.
             for (CBlockIndex *block = ::ChainActive()[height]; block;
                  block = ::ChainActive().Next(block)) {
                 if (block->GetBlockTime() >= time) {
                     return block->nHeight;
                 }
             }
             return nullopt;
         }
         Optional<int> findPruned(int start_height,
                                  Optional<int> stop_height) override {
             if (::fPruneMode) {
                 CBlockIndex *block = stop_height ? ::ChainActive()[*stop_height]
                                                  : ::ChainActive().Tip();
                 while (block && block->nHeight >= start_height) {
                     if (block->nStatus.hasData() == 0) {
                         return block->nHeight;
                     }
                     block = block->pprev;
                 }
             }
             return nullopt;
         }
         Optional<int> findFork(const BlockHash &hash,
                                Optional<int> *height) override {
             const CBlockIndex *block = LookupBlockIndex(hash);
             const CBlockIndex *fork =
                 block ? ::ChainActive().FindFork(block) : nullptr;
             if (height) {
                 if (block) {
                     *height = block->nHeight;
                 } else {
                     height->reset();
                 }
             }
             if (fork) {
                 return fork->nHeight;
             }
             return nullopt;
         }
         bool isPotentialTip(const BlockHash &hash) override {
             if (::ChainActive().Tip()->GetBlockHash() == hash) {
                 return true;
             }
             CBlockIndex *block = LookupBlockIndex(hash);
             return block && block->GetAncestor(::ChainActive().Height()) ==
                                 ::ChainActive().Tip();
         }
         CBlockLocator getLocator() override {
             return ::ChainActive().GetLocator();
         }
         Optional<int> findLocatorFork(const CBlockLocator &locator) override {
             LockAnnotation lock(::cs_main);
             if (CBlockIndex *fork =
                     FindForkInGlobalIndex(::ChainActive(), locator)) {
                 return fork->nHeight;
             }
             return nullopt;
         }
         bool contextualCheckTransactionForCurrentBlock(
             const Consensus::Params &params, const CTransaction &tx,
             CValidationState &state) override {
             LockAnnotation lock(::cs_main);
             return ContextualCheckTransactionForCurrentBlock(params, tx, state);
         }
         bool submitToMemoryPool(const Config &config, CTransactionRef tx,
                                 Amount absurd_fee,
                                 CValidationState &state) override {
             LockAnnotation lock(::cs_main);
             return AcceptToMemoryPool(config, ::g_mempool, state, tx,
                                       nullptr /* missing inputs */,
                                       false /* bypass limits */, absurd_fee);
         }
     };
 
     class LockingStateImpl : public LockImpl,
                              public UniqueLock<RecursiveMutex> {
         using UniqueLock::UniqueLock;
     };
 
     class NotificationsHandlerImpl : public Handler, CValidationInterface {
     public:
         explicit NotificationsHandlerImpl(Chain &chain,
                                           Chain::Notifications &notifications)
             : m_chain(chain), m_notifications(&notifications) {
             RegisterValidationInterface(this);
         }
         ~NotificationsHandlerImpl() override { disconnect(); }
         void disconnect() override {
             if (m_notifications) {
                 m_notifications = nullptr;
                 UnregisterValidationInterface(this);
             }
         }
         void TransactionAddedToMempool(const CTransactionRef &tx) override {
             m_notifications->TransactionAddedToMempool(tx);
         }
         void TransactionRemovedFromMempool(const CTransactionRef &tx) override {
             m_notifications->TransactionRemovedFromMempool(tx);
         }
         void BlockConnected(
             const std::shared_ptr<const CBlock> &block,
             const CBlockIndex *index,
             const std::vector<CTransactionRef> &tx_conflicted) override {
             m_notifications->BlockConnected(*block, tx_conflicted);
         }
         void
         BlockDisconnected(const std::shared_ptr<const CBlock> &block) override {
             m_notifications->BlockDisconnected(*block);
         }
         void ChainStateFlushed(const CBlockLocator &locator) override {
             m_notifications->ChainStateFlushed(locator);
         }
         void ResendWalletTransactions(int64_t best_block_time,
                                       CConnman *) override {
             // `cs_main` is always held when this method is called, so it is
             // safe to call `assumeLocked`. This is awkward, and the
             // `assumeLocked` method should be able to be removed entirely if
             // `ResendWalletTransactions` is replaced by a wallet timer as
             // suggested in https://github.com/bitcoin/bitcoin/issues/15619
             auto locked_chain = m_chain.assumeLocked();
             m_notifications->ResendWalletTransactions(*locked_chain,
                                                       best_block_time);
         }
         Chain &m_chain;
         Chain::Notifications *m_notifications;
     };
 
     class RpcHandlerImpl : public Handler {
     public:
         RpcHandlerImpl(const CRPCCommand &command)
             : m_command(command), m_wrapped_command(&command) {
             m_command.actor = [this](Config &config,
                                      const JSONRPCRequest &request,
                                      UniValue &result, bool last_handler) {
                 if (!m_wrapped_command) {
                     return false;
                 }
                 try {
                     return m_wrapped_command->actor(config, request, result,
                                                     last_handler);
                 } catch (const UniValue &e) {
                     // If this is not the last handler and a wallet not found
                     // exception was thrown, return false so the next handler
                     // can try to handle the request. Otherwise, reraise the
                     // exception.
                     if (!last_handler) {
                         const UniValue &code = e["code"];
                         if (code.isNum() &&
                             code.get_int() == RPC_WALLET_NOT_FOUND) {
                             return false;
                         }
                     }
                     throw;
                 }
             };
             ::tableRPC.appendCommand(m_command.name, &m_command);
         }
 
         void disconnect() override final {
             if (m_wrapped_command) {
                 m_wrapped_command = nullptr;
                 ::tableRPC.removeCommand(m_command.name, &m_command);
             }
         }
 
         ~RpcHandlerImpl() override { disconnect(); }
 
         CRPCCommand m_command;
         const CRPCCommand *m_wrapped_command;
     };
 
     class ChainImpl : public Chain {
     public:
         std::unique_ptr<Chain::Lock> lock(bool try_lock) override {
             auto result = std::make_unique<LockingStateImpl>(
                 ::cs_main, "cs_main", __FILE__, __LINE__, try_lock);
             if (try_lock && result && !*result) {
                 return {};
             }
             return result;
         }
         std::unique_ptr<Chain::Lock> assumeLocked() override {
             return std::make_unique<LockImpl>();
         }
         bool findBlock(const BlockHash &hash, CBlock *block, int64_t *time,
                        int64_t *time_max) override {
             CBlockIndex *index;
             {
                 LOCK(cs_main);
                 index = LookupBlockIndex(hash);
                 if (!index) {
                     return false;
                 }
                 if (time) {
                     *time = index->GetBlockTime();
                 }
                 if (time_max) {
                     *time_max = index->GetBlockTimeMax();
                 }
             }
             if (block &&
                 !ReadBlockFromDisk(*block, index, Params().GetConsensus())) {
                 block->SetNull();
             }
             return true;
         }
+        void findCoins(std::map<COutPoint, Coin> &coins) override {
+            return FindCoins(coins);
+        }
         double guessVerificationProgress(const BlockHash &block_hash) override {
             LOCK(cs_main);
             return GuessVerificationProgress(Params().TxData(),
                                              LookupBlockIndex(block_hash));
         }
         bool hasDescendantsInMempool(const TxId &txid) override {
             LOCK(::g_mempool.cs);
             auto it = ::g_mempool.GetIter(txid);
             return it && (*it)->GetCountWithDescendants() > 1;
         }
         void relayTransaction(const TxId &txid) override {
             CInv inv(MSG_TX, txid);
             g_connman->ForEachNode(
                 [&inv](CNode *node) { node->PushInventory(inv); });
         }
         void getTransactionAncestry(const TxId &txid, size_t &ancestors,
                                     size_t &descendants) override {
             ::g_mempool.GetTransactionAncestry(txid, ancestors, descendants);
         }
         bool checkChainLimits(const CTransactionRef &tx) override {
             LockPoints lp;
             CTxMemPoolEntry entry(tx, Amount(), 0, 0, false, 0, lp);
             CTxMemPool::setEntries ancestors;
             auto limit_ancestor_count =
                 gArgs.GetArg("-limitancestorcount", DEFAULT_ANCESTOR_LIMIT);
             auto limit_ancestor_size =
                 gArgs.GetArg("-limitancestorsize",
                              DEFAULT_ANCESTOR_SIZE_LIMIT) *
                 1000;
             auto limit_descendant_count =
                 gArgs.GetArg("-limitdescendantcount", DEFAULT_DESCENDANT_LIMIT);
             auto limit_descendant_size =
                 gArgs.GetArg("-limitdescendantsize",
                              DEFAULT_DESCENDANT_SIZE_LIMIT) *
                 1000;
             std::string unused_error_string;
             LOCK(::g_mempool.cs);
             return ::g_mempool.CalculateMemPoolAncestors(
                 entry, ancestors, limit_ancestor_count, limit_ancestor_size,
                 limit_descendant_count, limit_descendant_size,
                 unused_error_string);
         }
         Amount maxTxFee() override { return ::maxTxFee; }
         bool getPruneMode() override { return ::fPruneMode; }
         bool p2pEnabled() override { return g_connman != nullptr; }
         bool isInitialBlockDownload() override {
             return IsInitialBlockDownload();
         }
         int64_t getAdjustedTime() override { return GetAdjustedTime(); }
         void initMessage(const std::string &message) override {
             ::uiInterface.InitMessage(message);
         }
         void initWarning(const std::string &message) override {
             InitWarning(message);
         }
         void initError(const std::string &message) override {
             InitError(message);
         }
         void loadWallet(std::unique_ptr<Wallet> wallet) override {
             ::uiInterface.LoadWallet(wallet);
         }
         std::unique_ptr<Handler>
         handleNotifications(Notifications &notifications) override {
             return std::make_unique<NotificationsHandlerImpl>(*this,
                                                               notifications);
         }
         void waitForNotifications() override {
             SyncWithValidationInterfaceQueue();
         }
         std::unique_ptr<Handler>
         handleRpc(const CRPCCommand &command) override {
             return std::make_unique<RpcHandlerImpl>(command);
         }
     };
 
 } // namespace
 
 std::unique_ptr<Chain> MakeChain() {
     return std::make_unique<ChainImpl>();
 }
 
 } // namespace interfaces
diff --git a/src/interfaces/chain.h b/src/interfaces/chain.h
index 1592740e44..61dc08db15 100644
--- a/src/interfaces/chain.h
+++ b/src/interfaces/chain.h
@@ -1,296 +1,302 @@
 // Copyright (c) 2018 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_INTERFACES_CHAIN_H
 #define BITCOIN_INTERFACES_CHAIN_H
 
 #include <optional.h>
 #include <primitives/transaction.h>
 #include <primitives/txid.h>
 
 #include <cstddef>
 #include <cstdint>
 #include <memory>
 #include <string>
 #include <vector>
 
 struct BlockHash;
 class CBlock;
 struct CBlockLocator;
 class CChainParams;
+class Coin;
 class Config;
 class CRPCCommand;
 class CScheduler;
 class CValidationState;
 namespace Consensus {
 struct Params;
 }
 
 namespace interfaces {
 
 class Handler;
 class Wallet;
 
 //! Interface giving clients (wallet processes, maybe other analysis tools in
 //! the future) ability to access to the chain state, receive notifications,
 //! estimate fees, and submit transactions.
 //!
 //! TODO: Current chain methods are too low level, exposing too much of the
 //! internal workings of the bitcoin node, and not being very convenient to use.
 //! Chain methods should be cleaned up and simplified over time. Examples:
 //!
 //! * The Chain::lock() method, which lets clients delay chain tip updates
 //!   should be removed when clients are able to respond to updates
 //!   asynchronously
 //!   (https://github.com/bitcoin/bitcoin/pull/10973#issuecomment-380101269).
 //!
 //! * The isPotentialTip() and waitForNotifications() methods are too low-level
 //!   and should be replaced with a higher level
 //!   waitForNotificationsUpTo(block_hash) method that the wallet can call
 //!   instead
 //!   (https://github.com/bitcoin/bitcoin/pull/10973#discussion_r266995234).
 //!
 //! * The relayTransactions() and submitToMemoryPool() methods could be replaced
 //!   with a higher-level broadcastTransaction method
 //!   (https://github.com/bitcoin/bitcoin/pull/14978#issuecomment-459373984).
 //!
 //! * The initMessages() and loadWallet() methods which the wallet uses to send
 //!   notifications to the GUI should go away when GUI and wallet can directly
 //!   communicate with each other without going through the node
 //!   (https://github.com/bitcoin/bitcoin/pull/15288#discussion_r253321096).
 class Chain {
 public:
     virtual ~Chain() {}
 
     //! Interface for querying locked chain state, used by legacy code that
     //! assumes state won't change between calls. New code should avoid using
     //! the Lock interface and instead call higher-level Chain methods
     //! that return more information so the chain doesn't need to stay locked
     //! between calls.
     class Lock {
     public:
         virtual ~Lock() {}
 
         //! Get current chain height, not including genesis block (returns 0 if
         //! chain only contains genesis block, nullopt if chain does not contain
         //! any blocks).
         virtual Optional<int> getHeight() = 0;
 
         //! Get block height above genesis block. Returns 0 for genesis block,
         //! 1 for following block, and so on. Returns nullopt for a block not
         //! included in the current chain.
         virtual Optional<int> getBlockHeight(const BlockHash &hash) = 0;
 
         //! Get block depth. Returns 1 for chain tip, 2 for preceding block, and
         //! so on. Returns 0 for a block not included in the current chain.
         virtual int getBlockDepth(const BlockHash &hash) = 0;
 
         //! Get block hash. Height must be valid or this function will abort.
         virtual BlockHash getBlockHash(int height) = 0;
 
         //! Get block time. Height must be valid or this function will abort.
         virtual int64_t getBlockTime(int height) = 0;
 
         //! Get block median time past. Height must be valid or this function
         //! will abort.
         virtual int64_t getBlockMedianTimePast(int height) = 0;
 
         //! Check that the block is available on disk (i.e. has not been
         //! pruned), and contains transactions.
         virtual bool haveBlockOnDisk(int height) = 0;
 
         //! Return height of the first block in the chain with timestamp equal
         //! or greater than the given time, or nullopt if there is no block with
         //! a high enough timestamp. Also return the block hash as an optional
         //! output parameter (to avoid the cost of a second lookup in case this
         //! information is needed.)
         virtual Optional<int> findFirstBlockWithTime(int64_t time,
                                                      BlockHash *hash) = 0;
 
         //! Return height of the first block in the chain with timestamp equal
         //! or greater than the given time and height equal or greater than the
         //! given height, or nullopt if there is no such block.
         //!
         //! Calling this with height 0 is equivalent to calling
         //! findFirstBlockWithTime, but less efficient because it requires a
         //! linear instead of a binary search.
         virtual Optional<int> findFirstBlockWithTimeAndHeight(int64_t time,
                                                               int height) = 0;
 
         //! Return height of last block in the specified range which is pruned,
         //! or nullopt if no block in the range is pruned. Range is inclusive.
         virtual Optional<int>
         findPruned(int start_height = 0,
                    Optional<int> stop_height = nullopt) = 0;
 
         //! Return height of the highest block on the chain that is an ancestor
         //! of the specified block, or nullopt if no common ancestor is found.
         //! Also return the height of the specified block as an optional output
         //! parameter (to avoid the cost of a second hash lookup in case this
         //! information is desired).
         virtual Optional<int> findFork(const BlockHash &hash,
                                        Optional<int> *height) = 0;
 
         //! Return true if block hash points to the current chain tip, or to a
         //! possible descendant of the current chain tip that isn't currently
         //! connected.
         virtual bool isPotentialTip(const BlockHash &hash) = 0;
 
         //! Get locator for the current chain tip.
         virtual CBlockLocator getLocator() = 0;
 
         //! Return height of the latest block common to locator and chain, which
         //! is guaranteed to be an ancestor of the block used to create the
         //! locator.
         virtual Optional<int> findLocatorFork(const CBlockLocator &locator) = 0;
 
         //! Check if transaction will be final given chain height current time.
         virtual bool contextualCheckTransactionForCurrentBlock(
             const Consensus::Params &params, const CTransaction &tx,
             CValidationState &state) = 0;
 
         //! Add transaction to memory pool if the transaction fee is below the
         //! amount specified by absurd_fee (as a safeguard). */
         virtual bool submitToMemoryPool(const Config &config,
                                         CTransactionRef tx, Amount absurd_fee,
                                         CValidationState &state) = 0;
     };
 
     //! Return Lock interface. Chain is locked when this is called, and
     //! unlocked when the returned interface is freed.
     virtual std::unique_ptr<Lock> lock(bool try_lock = false) = 0;
 
     //! Return Lock interface assuming chain is already locked. This
     //! method is temporary and is only used in a few places to avoid changing
     //! behavior while code is transitioned to use the Chain::Lock interface.
     virtual std::unique_ptr<Lock> assumeLocked() = 0;
 
     //! Return whether node has the block and optionally return block metadata
     //! or contents.
     //!
     //! If a block pointer is provided to retrieve the block contents, and the
     //! block exists but doesn't have data (for example due to pruning), the
     //! block will be empty and all fields set to null.
     virtual bool findBlock(const BlockHash &hash, CBlock *block = nullptr,
                            int64_t *time = nullptr,
                            int64_t *max_time = nullptr) = 0;
 
+    //! Look up unspent output information. Returns coins in the mempool and in
+    //! the current chain UTXO set. Iterates through all the keys in the map and
+    //! populates the values.
+    virtual void findCoins(std::map<COutPoint, Coin> &coins) = 0;
+
     //! Estimate fraction of total transactions verified if blocks up to
     //! the specified block hash are verified.
     virtual double guessVerificationProgress(const BlockHash &block_hash) = 0;
 
     //! Check if transaction has descendants in mempool.
     virtual bool hasDescendantsInMempool(const TxId &txid) = 0;
 
     //! Calculate mempool ancestor and descendant counts for the given
     //! transaction.
     virtual void getTransactionAncestry(const TxId &txid, size_t &ancestors,
                                         size_t &descendants) = 0;
 
     //! Relay transaction.
     virtual void relayTransaction(const TxId &txid) = 0;
 
     //! Check if transaction will pass the mempool's chain limits.
     virtual bool checkChainLimits(const CTransactionRef &tx) = 0;
 
     //! Get node max tx fee setting (-maxtxfee).
     //! This could be replaced by a per-wallet max fee, as proposed at
     //! https://github.com/bitcoin/bitcoin/issues/15355
     //! But for the time being, wallets call this to access the node setting.
     virtual Amount maxTxFee() = 0;
 
     //! Check if pruning is enabled.
     virtual bool getPruneMode() = 0;
 
     //! Check if p2p enabled.
     virtual bool p2pEnabled() = 0;
 
     // Check if in IBD.
     virtual bool isInitialBlockDownload() = 0;
 
     //! Get adjusted time.
     virtual int64_t getAdjustedTime() = 0;
 
     //! Send init message.
     virtual void initMessage(const std::string &message) = 0;
 
     //! Send init warning.
     virtual void initWarning(const std::string &message) = 0;
 
     //! Send init error.
     virtual void initError(const std::string &message) = 0;
 
     //! Send wallet load notification to the GUI.
     virtual void loadWallet(std::unique_ptr<Wallet> wallet) = 0;
 
     //! Chain notifications.
     class Notifications {
     public:
         virtual ~Notifications() {}
         virtual void TransactionAddedToMempool(const CTransactionRef &tx) {}
         virtual void TransactionRemovedFromMempool(const CTransactionRef &ptx) {
         }
         virtual void
         BlockConnected(const CBlock &block,
                        const std::vector<CTransactionRef> &tx_conflicted) {}
         virtual void BlockDisconnected(const CBlock &block) {}
         virtual void ChainStateFlushed(const CBlockLocator &locator) {}
         virtual void ResendWalletTransactions(Lock &locked_chain,
                                               int64_t best_block_time) {}
     };
 
     //! Register handler for notifications.
     virtual std::unique_ptr<Handler>
     handleNotifications(Notifications &notifications) = 0;
 
     //! Wait for pending notifications to be handled.
     virtual void waitForNotifications() = 0;
 
     //! Register handler for RPC. Command is not copied, so reference
     //! needs to remain valid until Handler is disconnected.
     virtual std::unique_ptr<Handler> handleRpc(const CRPCCommand &command) = 0;
 };
 
 //! Interface to let node manage chain clients (wallets, or maybe tools for
 //! monitoring and analysis in the future).
 class ChainClient {
 public:
     virtual ~ChainClient() {}
 
     //! Register rpcs.
     virtual void registerRpcs() = 0;
 
     //! Check for errors before loading.
     virtual bool verify(const CChainParams &chainParams) = 0;
 
     //! Load saved state.
     virtual bool load(const CChainParams &chainParams) = 0;
 
     //! Start client execution and provide a scheduler.
     virtual void start(CScheduler &scheduler) = 0;
 
     //! Save state to disk.
     virtual void flush() = 0;
 
     //! Shut down client.
     virtual void stop() = 0;
 };
 
 //! Return implementation of Chain interface.
 std::unique_ptr<Chain> MakeChain();
 
 //! Return implementation of ChainClient interface for a wallet client. This
 //! function will be undefined in builds where ENABLE_WALLET is false.
 //!
 //! Currently, wallets are the only chain clients. But in the future, other
 //! types of chain clients could be added, such as tools for monitoring,
 //! analysis, or fee estimation. These clients need to expose their own
 //! MakeXXXClient functions returning their implementations of the ChainClient
 //! interface.
 std::unique_ptr<ChainClient>
 MakeWalletClient(Chain &chain, std::vector<std::string> wallet_filenames);
 
 } // namespace interfaces
 
 #endif // BITCOIN_INTERFACES_CHAIN_H
diff --git a/src/node/coin.cpp b/src/node/coin.cpp
new file mode 100644
index 0000000000..c7ed35436b
--- /dev/null
+++ b/src/node/coin.cpp
@@ -0,0 +1,22 @@
+// Copyright (c) 2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <node/coin.h>
+
+#include <txmempool.h>
+#include <validation.h>
+
+void FindCoins(std::map<COutPoint, Coin> &coins) {
+    LOCK2(cs_main, ::g_mempool.cs);
+    assert(pcoinsTip);
+    CCoinsViewCache &chain_view = *::pcoinsTip;
+    CCoinsViewMemPool mempool_view(&chain_view, ::g_mempool);
+    for (auto &coin : coins) {
+        if (!mempool_view.GetCoin(coin.first, coin.second)) {
+            // Either the coin is not in the CCoinsViewCache or is spent. Clear
+            // it.
+            coin.second.Clear();
+        }
+    }
+}
diff --git a/src/node/coin.h b/src/node/coin.h
new file mode 100644
index 0000000000..f574535790
--- /dev/null
+++ b/src/node/coin.h
@@ -0,0 +1,22 @@
+// Copyright (c) 2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_NODE_COIN_H
+#define BITCOIN_NODE_COIN_H
+
+#include <map>
+
+class COutPoint;
+class Coin;
+
+/**
+ * Look up unspent output information. Returns coins in the mempool and in the
+ * current chain UTXO set. Iterates through all the keys in the map and
+ * populates the values.
+ *
+ * @param[in,out] coins map to fill
+ */
+void FindCoins(std::map<COutPoint, Coin> &coins);
+
+#endif // BITCOIN_NODE_COIN_H
diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
index 937d312256..b3943ebefd 100644
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -1,2047 +1,2043 @@
 // Copyright (c) 2010 Satoshi Nakamoto
 // Copyright (c) 2009-2016 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <chain.h>
 #include <chainparams.h>
 #include <coins.h>
 #include <compat/byteswap.h>
 #include <config.h>
 #include <consensus/validation.h>
 #include <core_io.h>
 #include <index/txindex.h>
 #include <init.h>
+#include <interfaces/chain.h>
 #include <key_io.h>
 #include <keystore.h>
 #include <merkleblock.h>
 #include <node/transaction.h>
 #include <policy/policy.h>
 #include <primitives/transaction.h>
 #include <psbt.h>
 #include <rpc/rawtransaction.h>
 #include <rpc/server.h>
 #include <rpc/util.h>
 #include <script/script.h>
 #include <script/script_error.h>
 #include <script/sign.h>
 #include <script/standard.h>
 #include <txmempool.h>
 #include <uint256.h>
 #include <util/strencodings.h>
 #include <validation.h>
 #include <validationinterface.h>
 
 #include <cstdint>
 
 #include <univalue.h>
 
 static void TxToJSON(const CTransaction &tx, const BlockHash &hashBlock,
                      UniValue &entry) {
     // Call into TxToUniv() in bitcoin-common to decode the transaction hex.
     //
     // Blockchain contextual information (confirmations and blocktime) is not
     // available to code in bitcoin-common, so we query them here and push the
     // data into the returned UniValue.
     TxToUniv(tx, uint256(), entry, true, RPCSerializationFlags());
 
     if (!hashBlock.IsNull()) {
         LOCK(cs_main);
 
         entry.pushKV("blockhash", hashBlock.GetHex());
         CBlockIndex *pindex = LookupBlockIndex(hashBlock);
         if (pindex) {
             if (::ChainActive().Contains(pindex)) {
                 entry.pushKV("confirmations",
                              1 + ::ChainActive().Height() - pindex->nHeight);
                 entry.pushKV("time", pindex->GetBlockTime());
                 entry.pushKV("blocktime", pindex->GetBlockTime());
             } else {
                 entry.pushKV("confirmations", 0);
             }
         }
     }
 }
 
 static UniValue getrawtransaction(const Config &config,
                                   const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 3) {
         throw std::runtime_error(RPCHelpMan{
             "getrawtransaction",
             "\nNOTE: By default this function only works for "
             "mempool transactions. If the -txindex option is\n"
             "enabled, it also works for blockchain transactions. If "
             "the block which contains the transaction\n"
             "is known, its hash can be provided even for nodes "
             "without -txindex. Note that if a blockhash is\n"
             "provided, only that block will be searched and if the "
             "transaction is in the mempool or other\n"
             "blocks, or if this node does not have the given block "
             "available, the transaction will not be found.\n"
             "DEPRECATED: for now, it also works for transactions with "
             "unspent outputs.\n"
 
             "\nReturn the raw transaction data.\n"
             "\nIf verbose is 'true', returns an Object with information "
             "about 'txid'.\n"
             "If verbose is 'false' or omitted, returns a string that is "
             "serialized, hex-encoded data for 'txid'.\n",
             {
                 {"txid", RPCArg::Type::STR_HEX, /* opt */ false,
                  /* default_val */ "", "The transaction id"},
                 {"verbose", RPCArg::Type::BOOL, /* opt */ true,
                  /* default_val */ "false",
                  "If false, return a string, otherwise return a json "
                  "object"},
                 {"blockhash", RPCArg::Type::STR_HEX, /* opt */ true,
                  /* default_val */ "",
                  "The block in which to look for the transaction"},
             },
             {
                 RPCResult{"if verbose is not set or set to false",
                           "\"data\"      (string) The serialized, hex-encoded "
                           "data for 'txid'\n"},
                 RPCResult{
                     "if verbose is set to true",
                     "{\n"
                     "  \"in_active_chain\": b, (bool) Whether specified block "
                     "is in "
                     "the active chain or not (only present with explicit "
                     "\"blockhash\" "
                     "argument)\n"
                     "  \"hex\" : \"data\",       (string) The serialized, "
                     "hex-encoded "
                     "data for 'txid'\n"
                     "  \"txid\" : \"id\",        (string) The transaction id "
                     "(same as "
                     "provided)\n"
                     "  \"hash\" : \"id\",        (string) The transaction hash "
                     "(differs from txid for witness transactions)\n"
                     "  \"size\" : n,             (numeric) The serialized "
                     "transaction "
                     "size\n"
                     "  \"version\" : n,          (numeric) The version\n"
                     "  \"locktime\" : ttt,       (numeric) The lock time\n"
                     "  \"vin\" : [               (array of json objects)\n"
                     "     {\n"
                     "       \"txid\": \"id\",    (string) The transaction id\n"
                     "       \"vout\": n,         (numeric) \n"
                     "       \"scriptSig\": {     (json object) The script\n"
                     "         \"asm\": \"asm\",  (string) asm\n"
                     "         \"hex\": \"hex\"   (string) hex\n"
                     "       },\n"
                     "       \"sequence\": n      (numeric) The script sequence "
                     "number\n"
                     "     }\n"
                     "     ,...\n"
                     "  ],\n"
                     "  \"vout\" : [              (array of json objects)\n"
                     "     {\n"
                     "       \"value\" : x.xxx,            (numeric) The value "
                     "in " +
                         CURRENCY_UNIT +
                         "\n"
                         "       \"n\" : n,                    (numeric) index\n"
                         "       \"scriptPubKey\" : {          (json object)\n"
                         "         \"asm\" : \"asm\",          (string) the "
                         "asm\n"
                         "         \"hex\" : \"hex\",          (string) the "
                         "hex\n"
                         "         \"reqSigs\" : n,            (numeric) The "
                         "required sigs\n"
                         "         \"type\" : \"pubkeyhash\",  (string) The "
                         "type, eg "
                         "'pubkeyhash'\n"
                         "         \"addresses\" : [           (json array of "
                         "string)\n"
                         "           \"address\"        (string) bitcoin "
                         "address\n"
                         "           ,...\n"
                         "         ]\n"
                         "       }\n"
                         "     }\n"
                         "     ,...\n"
                         "  ],\n"
                         "  \"blockhash\" : \"hash\",   (string) the block "
                         "hash\n"
                         "  \"confirmations\" : n,      (numeric) The "
                         "confirmations\n"
                         "  \"time\" : ttt,             (numeric) The "
                         "transaction time in "
                         "seconds since epoch (Jan 1 1970 GMT)\n"
                         "  \"blocktime\" : ttt         (numeric) The block "
                         "time in seconds "
                         "since epoch (Jan 1 1970 GMT)\n"
                         "}\n"},
             },
             RPCExamples{
                 HelpExampleCli("getrawtransaction", "\"mytxid\"") +
                 HelpExampleCli("getrawtransaction", "\"mytxid\" true") +
                 HelpExampleRpc("getrawtransaction", "\"mytxid\", true") +
                 HelpExampleCli("getrawtransaction",
                                "\"mytxid\" false \"myblockhash\"") +
                 HelpExampleCli("getrawtransaction",
                                "\"mytxid\" true \"myblockhash\"")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     bool in_active_chain = true;
     TxId txid = TxId(ParseHashV(request.params[0], "parameter 1"));
     CBlockIndex *blockindex = nullptr;
 
     const CChainParams &params = config.GetChainParams();
     if (txid == params.GenesisBlock().hashMerkleRoot) {
         // Special exception for the genesis block coinbase transaction
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                            "The genesis block coinbase is not considered an "
                            "ordinary transaction and cannot be retrieved");
     }
 
     // Accept either a bool (true) or a num (>=1) to indicate verbose output.
     bool fVerbose = false;
     if (!request.params[1].isNull()) {
         fVerbose = request.params[1].isNum()
                        ? (request.params[1].get_int() != 0)
                        : request.params[1].get_bool();
     }
 
     if (!request.params[2].isNull()) {
         LOCK(cs_main);
 
         BlockHash blockhash(ParseHashV(request.params[2], "parameter 3"));
         blockindex = LookupBlockIndex(blockhash);
         if (!blockindex) {
             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                "Block hash not found");
         }
         in_active_chain = ::ChainActive().Contains(blockindex);
     }
 
     bool f_txindex_ready = false;
     if (g_txindex && !blockindex) {
         f_txindex_ready = g_txindex->BlockUntilSyncedToCurrentChain();
     }
 
     CTransactionRef tx;
     BlockHash hash_block;
     if (!GetTransaction(txid, tx, params.GetConsensus(), hash_block, true,
                         blockindex)) {
         std::string errmsg;
         if (blockindex) {
             if (!blockindex->nStatus.hasData()) {
                 throw JSONRPCError(RPC_MISC_ERROR, "Block not available");
             }
             errmsg = "No such transaction found in the provided block";
         } else if (!g_txindex) {
             errmsg = "No such mempool transaction. Use -txindex to enable "
                      "blockchain transaction queries";
         } else if (!f_txindex_ready) {
             errmsg = "No such mempool transaction. Blockchain transactions are "
                      "still in the process of being indexed";
         } else {
             errmsg = "No such mempool or blockchain transaction";
         }
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                            errmsg +
                                ". Use gettransaction for wallet transactions.");
     }
 
     if (!fVerbose) {
         return EncodeHexTx(*tx, RPCSerializationFlags());
     }
 
     UniValue result(UniValue::VOBJ);
     if (blockindex) {
         result.pushKV("in_active_chain", in_active_chain);
     }
     TxToJSON(*tx, hash_block, result);
     return result;
 }
 
 static UniValue gettxoutproof(const Config &config,
                               const JSONRPCRequest &request) {
     if (request.fHelp ||
         (request.params.size() != 1 && request.params.size() != 2)) {
         throw std::runtime_error(RPCHelpMan{
             "gettxoutproof",
             "\nReturns a hex-encoded proof that \"txid\" was "
             "included in a block.\n"
             "\nNOTE: By default this function only works sometimes. "
             "This is when there is an\n"
             "unspent output in the utxo for this transaction. To "
             "make it always work,\n"
             "you need to maintain a transaction index, using the "
             "-txindex command line option or\n"
             "specify the block in which the transaction is included "
             "manually (by blockhash).\n",
             {
                 {
                     "txids",
                     RPCArg::Type::ARR,
                     /* opt */ false,
                     /* default_val */ "",
                     "A json array of txids to filter",
                     {
                         {"txid", RPCArg::Type::STR_HEX, /* opt */ false,
                          /* default_val */ "", "A transaction hash"},
                     },
                 },
                 {"blockhash", RPCArg::Type::STR_HEX, /* opt */ true,
                  /* default_val */ "",
                  "If specified, looks for txid in the block with this "
                  "hash"},
             },
             RPCResult{"\"data\"           (string) A string that is a "
                       "serialized, hex-encoded data for the proof.\n"},
             RPCExamples{""},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     std::set<TxId> setTxIds;
     TxId oneTxId;
     UniValue txids = request.params[0].get_array();
     for (unsigned int idx = 0; idx < txids.size(); idx++) {
         const UniValue &utxid = txids[idx];
         TxId txid(ParseHashV(utxid, "txid"));
         if (setTxIds.count(txid)) {
             throw JSONRPCError(
                 RPC_INVALID_PARAMETER,
                 std::string("Invalid parameter, duplicated txid: ") +
                     utxid.get_str());
         }
 
         setTxIds.insert(txid);
         oneTxId = txid;
     }
 
     CBlockIndex *pblockindex = nullptr;
 
     BlockHash hashBlock;
     if (!request.params[1].isNull()) {
         LOCK(cs_main);
         hashBlock = BlockHash(ParseHashV(request.params[1], "blockhash"));
         pblockindex = LookupBlockIndex(hashBlock);
         if (!pblockindex) {
             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
         }
     } else {
         LOCK(cs_main);
         // Loop through txids and try to find which block they're in. Exit loop
         // once a block is found.
         for (const auto &txid : setTxIds) {
             const Coin &coin = AccessByTxid(*pcoinsTip, txid);
             if (!coin.IsSpent()) {
                 pblockindex = ::ChainActive()[coin.GetHeight()];
                 break;
             }
         }
     }
 
     // Allow txindex to catch up if we need to query it and before we acquire
     // cs_main.
     if (g_txindex && !pblockindex) {
         g_txindex->BlockUntilSyncedToCurrentChain();
     }
 
     const Consensus::Params &params = config.GetChainParams().GetConsensus();
 
     LOCK(cs_main);
 
     if (pblockindex == nullptr) {
         CTransactionRef tx;
         if (!GetTransaction(oneTxId, tx, params, hashBlock, false) ||
             hashBlock.IsNull()) {
             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                "Transaction not yet in block");
         }
 
         pblockindex = LookupBlockIndex(hashBlock);
         if (!pblockindex) {
             throw JSONRPCError(RPC_INTERNAL_ERROR, "Transaction index corrupt");
         }
     }
 
     CBlock block;
     if (!ReadBlockFromDisk(block, pblockindex, params)) {
         throw JSONRPCError(RPC_INTERNAL_ERROR, "Can't read block from disk");
     }
 
     unsigned int ntxFound = 0;
     for (const auto &tx : block.vtx) {
         if (setTxIds.count(tx->GetId())) {
             ntxFound++;
         }
     }
 
     if (ntxFound != setTxIds.size()) {
         throw JSONRPCError(
             RPC_INVALID_ADDRESS_OR_KEY,
             "Not all transactions found in specified or retrieved block");
     }
 
     CDataStream ssMB(SER_NETWORK, PROTOCOL_VERSION);
     CMerkleBlock mb(block, setTxIds);
     ssMB << mb;
     std::string strHex = HexStr(ssMB.begin(), ssMB.end());
     return strHex;
 }
 
 static UniValue verifytxoutproof(const Config &config,
                                  const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() != 1) {
         throw std::runtime_error(RPCHelpMan{
             "verifytxoutproof",
             "\nVerifies that a proof points to a transaction in a "
             "block, returning the transaction it commits to\n"
             "and throwing an RPC error if the block is not in our "
             "best chain\n",
             {
                 {"proof", RPCArg::Type::STR_HEX, /* opt */ false,
                  /* default_val */ "",
                  "The hex-encoded proof generated by gettxoutproof"},
             },
             RPCResult{"[\"txid\"]      (array, strings) The txid(s) which the "
                       "proof commits to, or empty array if the proof can not "
                       "be validated.\n"},
             RPCExamples{""},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     CDataStream ssMB(ParseHexV(request.params[0], "proof"), SER_NETWORK,
                      PROTOCOL_VERSION);
     CMerkleBlock merkleBlock;
     ssMB >> merkleBlock;
 
     UniValue res(UniValue::VARR);
 
     std::vector<uint256> vMatch;
     std::vector<size_t> vIndex;
     if (merkleBlock.txn.ExtractMatches(vMatch, vIndex) !=
         merkleBlock.header.hashMerkleRoot) {
         return res;
     }
 
     LOCK(cs_main);
 
     const CBlockIndex *pindex = LookupBlockIndex(merkleBlock.header.GetHash());
     if (!pindex || !::ChainActive().Contains(pindex) || pindex->nTx == 0) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                            "Block not found in chain");
     }
 
     // Check if proof is valid, only add results if so
     if (pindex->nTx == merkleBlock.txn.GetNumTransactions()) {
         for (const uint256 &hash : vMatch) {
             res.push_back(hash.GetHex());
         }
     }
 
     return res;
 }
 
 CMutableTransaction ConstructTransaction(const CChainParams &params,
                                          const UniValue &inputs_in,
                                          const UniValue &outputs_in,
                                          const UniValue &locktime) {
     if (inputs_in.isNull() || outputs_in.isNull()) {
         throw JSONRPCError(
             RPC_INVALID_PARAMETER,
             "Invalid parameter, arguments 1 and 2 must be non-null");
     }
 
     UniValue inputs = inputs_in.get_array();
     const bool outputs_is_obj = outputs_in.isObject();
     UniValue outputs =
         outputs_is_obj ? outputs_in.get_obj() : outputs_in.get_array();
 
     CMutableTransaction rawTx;
 
     if (!locktime.isNull()) {
         int64_t nLockTime = locktime.get_int64();
         if (nLockTime < 0 || nLockTime > std::numeric_limits<uint32_t>::max()) {
             throw JSONRPCError(RPC_INVALID_PARAMETER,
                                "Invalid parameter, locktime out of range");
         }
 
         rawTx.nLockTime = nLockTime;
     }
 
     for (size_t idx = 0; idx < inputs.size(); idx++) {
         const UniValue &input = inputs[idx];
         const UniValue &o = input.get_obj();
 
         TxId txid(ParseHashO(o, "txid"));
 
         const UniValue &vout_v = find_value(o, "vout");
         if (vout_v.isNull()) {
             throw JSONRPCError(RPC_INVALID_PARAMETER,
                                "Invalid parameter, missing vout key");
         }
 
         if (!vout_v.isNum()) {
             throw JSONRPCError(RPC_INVALID_PARAMETER,
                                "Invalid parameter, vout must be a number");
         }
 
         int nOutput = vout_v.get_int();
         if (nOutput < 0) {
             throw JSONRPCError(RPC_INVALID_PARAMETER,
                                "Invalid parameter, vout must be positive");
         }
 
         uint32_t nSequence =
             (rawTx.nLockTime ? std::numeric_limits<uint32_t>::max() - 1
                              : std::numeric_limits<uint32_t>::max());
 
         // Set the sequence number if passed in the parameters object.
         const UniValue &sequenceObj = find_value(o, "sequence");
         if (sequenceObj.isNum()) {
             int64_t seqNr64 = sequenceObj.get_int64();
             if (seqNr64 < 0 || seqNr64 > std::numeric_limits<uint32_t>::max()) {
                 throw JSONRPCError(
                     RPC_INVALID_PARAMETER,
                     "Invalid parameter, sequence number is out of range");
             }
 
             nSequence = uint32_t(seqNr64);
         }
 
         CTxIn in(COutPoint(txid, nOutput), CScript(), nSequence);
         rawTx.vin.push_back(in);
     }
 
     std::set<CTxDestination> destinations;
     if (!outputs_is_obj) {
         // Translate array of key-value pairs into dict
         UniValue outputs_dict = UniValue(UniValue::VOBJ);
         for (size_t i = 0; i < outputs.size(); ++i) {
             const UniValue &output = outputs[i];
             if (!output.isObject()) {
                 throw JSONRPCError(RPC_INVALID_PARAMETER,
                                    "Invalid parameter, key-value pair not an "
                                    "object as expected");
             }
             if (output.size() != 1) {
                 throw JSONRPCError(RPC_INVALID_PARAMETER,
                                    "Invalid parameter, key-value pair must "
                                    "contain exactly one key");
             }
             outputs_dict.pushKVs(output);
         }
         outputs = std::move(outputs_dict);
     }
     for (const std::string &name_ : outputs.getKeys()) {
         if (name_ == "data") {
             std::vector<uint8_t> data =
                 ParseHexV(outputs[name_].getValStr(), "Data");
 
             CTxOut out(Amount::zero(), CScript() << OP_RETURN << data);
             rawTx.vout.push_back(out);
         } else {
             CTxDestination destination = DecodeDestination(name_, params);
             if (!IsValidDestination(destination)) {
                 throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                    std::string("Invalid Bitcoin address: ") +
                                        name_);
             }
 
             if (!destinations.insert(destination).second) {
                 throw JSONRPCError(
                     RPC_INVALID_PARAMETER,
                     std::string("Invalid parameter, duplicated address: ") +
                         name_);
             }
 
             CScript scriptPubKey = GetScriptForDestination(destination);
             Amount nAmount = AmountFromValue(outputs[name_]);
 
             CTxOut out(nAmount, scriptPubKey);
             rawTx.vout.push_back(out);
         }
     }
 
     return rawTx;
 }
 
 static UniValue createrawtransaction(const Config &config,
                                      const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() < 2 ||
         request.params.size() > 3) {
         throw std::runtime_error(RPCHelpMan{
             "createrawtransaction",
             "\nCreate a transaction spending the given inputs and creating "
             "new outputs.\n"
             "Outputs can be addresses or data.\n"
             "Returns hex-encoded raw transaction.\n"
             "Note that the transaction's inputs are not signed, and\n"
             "it is not stored in the wallet or transmitted to the "
             "network.\n",
             {
                 {
                     "inputs",
                     RPCArg::Type::ARR,
                     /* opt */ false,
                     /* default_val */ "",
                     "A json array of json objects",
                     {
                         {
                             "",
                             RPCArg::Type::OBJ,
                             /* opt */ false,
                             /* default_val */ "",
                             "",
                             {
                                 {"txid", RPCArg::Type::STR_HEX,
                                  /* opt */ false, /* default_val */ "",
                                  "The transaction id"},
                                 {"vout", RPCArg::Type::NUM, /* opt */ false,
                                  /* default_val */ "", "The output number"},
                                 {"sequence", RPCArg::Type::NUM,
                                  /* opt */ true, /* default_val */ "",
                                  "The sequence number"},
                             },
                         },
                     },
                 },
                 {
                     "outputs",
                     RPCArg::Type::ARR,
                     /* opt */ false,
                     /* default_val */ "",
                     "a json array with outputs (key-value pairs).\n"
                     "For compatibility reasons, a dictionary, which holds "
                     "the key-value pairs directly, is also\n"
                     "                             accepted as second "
                     "parameter.",
                     {
                         {
                             "",
                             RPCArg::Type::OBJ,
                             /* opt */ true,
                             /* default_val */ "",
                             "",
                             {
                                 {"address", RPCArg::Type::AMOUNT,
                                  /* opt */ false, /* default_val */ "",
                                  "A key-value pair. The key (string) is "
                                  "the bitcoin address, the value (float or "
                                  "string) is the amount in " +
                                      CURRENCY_UNIT},
                             },
                         },
                         {
                             "",
                             RPCArg::Type::OBJ,
                             /* opt */ true,
                             /* default_val */ "",
                             "",
                             {
                                 {"data", RPCArg::Type::STR_HEX,
                                  /* opt */ false, /* default_val */ "",
                                  "A key-value pair. The key must be "
                                  "\"data\", the value is hex-encoded data"},
                             },
                         },
                     },
                 },
                 {"locktime", RPCArg::Type::NUM, /* opt */ true,
                  /* default_val */ "0",
                  "Raw locktime. Non-0 value also locktime-activates "
                  "inputs"},
             },
             RPCResult{"\"transaction\"              (string) hex string of the "
                       "transaction\n"},
             RPCExamples{
                 HelpExampleCli("createrawtransaction",
                                "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]"
                                "\" \"[{\\\"address\\\":0.01}]\"") +
                 HelpExampleCli("createrawtransaction",
                                "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]"
                                "\" \"[{\\\"data\\\":\\\"00010203\\\"}]\"") +
                 HelpExampleRpc("createrawtransaction",
                                "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]"
                                "\", \"[{\\\"address\\\":0.01}]\"") +
                 HelpExampleRpc("createrawtransaction",
                                "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]"
                                "\", \"[{\\\"data\\\":\\\"00010203\\\"}]\"")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     RPCTypeCheck(request.params,
                  {UniValue::VARR,
                   UniValueType(), // ARR or OBJ, checked later
                   UniValue::VNUM},
                  true);
 
     CMutableTransaction rawTx =
         ConstructTransaction(config.GetChainParams(), request.params[0],
                              request.params[1], request.params[2]);
 
     return EncodeHexTx(CTransaction(rawTx));
 }
 
 static UniValue decoderawtransaction(const Config &config,
                                      const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() != 1) {
         throw std::runtime_error(RPCHelpMan{
             "decoderawtransaction",
             "\nReturn a JSON object representing the serialized, "
             "hex-encoded transaction.\n",
             {
                 {"hexstring", RPCArg::Type::STR_HEX, /* opt */ false,
                  /* default_val */ "", "The transaction hex string"},
             },
             RPCResult{
                 "{\n"
                 "  \"txid\" : \"id\",        (string) The transaction id\n"
                 "  \"hash\" : \"id\",        (string) The transaction hash "
                 "(differs from txid for witness transactions)\n"
                 "  \"size\" : n,             (numeric) The transaction size\n"
                 "  \"version\" : n,          (numeric) The version\n"
                 "  \"locktime\" : ttt,       (numeric) The lock time\n"
                 "  \"vin\" : [               (array of json objects)\n"
                 "     {\n"
                 "       \"txid\": \"id\",    (string) The transaction id\n"
                 "       \"vout\": n,         (numeric) The output number\n"
                 "       \"scriptSig\": {     (json object) The script\n"
                 "         \"asm\": \"asm\",  (string) asm\n"
                 "         \"hex\": \"hex\"   (string) hex\n"
                 "       },\n"
                 "       \"sequence\": n     (numeric) The script sequence "
                 "number\n"
                 "     }\n"
                 "     ,...\n"
                 "  ],\n"
                 "  \"vout\" : [             (array of json objects)\n"
                 "     {\n"
                 "       \"value\" : x.xxx,            (numeric) The value in " +
                 CURRENCY_UNIT +
                 "\n"
                 "       \"n\" : n,                    (numeric) index\n"
                 "       \"scriptPubKey\" : {          (json object)\n"
                 "         \"asm\" : \"asm\",          (string) the asm\n"
                 "         \"hex\" : \"hex\",          (string) the hex\n"
                 "         \"reqSigs\" : n,            (numeric) The required "
                 "sigs\n"
                 "         \"type\" : \"pubkeyhash\",  (string) The type, eg "
                 "'pubkeyhash'\n"
                 "         \"addresses\" : [           (json array of string)\n"
                 "           \"12tvKAXCxZjSmdNbao16dKXC8tRWfcF5oc\"   (string) "
                 "bitcoin address\n"
                 "           ,...\n"
                 "         ]\n"
                 "       }\n"
                 "     }\n"
                 "     ,...\n"
                 "  ],\n"
                 "}\n"},
             RPCExamples{
                 HelpExampleCli("decoderawtransaction", "\"hexstring\"") +
                 HelpExampleRpc("decoderawtransaction", "\"hexstring\"")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     RPCTypeCheck(request.params, {UniValue::VSTR});
 
     CMutableTransaction mtx;
 
     if (!DecodeHexTx(mtx, request.params[0].get_str())) {
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
     }
 
     UniValue result(UniValue::VOBJ);
     TxToUniv(CTransaction(std::move(mtx)), uint256(), result, false);
 
     return result;
 }
 
 static UniValue decodescript(const Config &config,
                              const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() != 1) {
         throw std::runtime_error(RPCHelpMan{
             "decodescript",
             "\nDecode a hex-encoded script.\n",
             {
                 {"hexstring", RPCArg::Type::STR_HEX, /* opt */ false,
                  /* default_val */ "", "the hex-encoded script"},
             },
             RPCResult{
                 "{\n"
                 "  \"asm\":\"asm\",   (string) Script public key\n"
                 "  \"hex\":\"hex\",   (string) hex-encoded public key\n"
                 "  \"type\":\"type\", (string) The output type\n"
                 "  \"reqSigs\": n,    (numeric) The required signatures\n"
                 "  \"addresses\": [   (json array of string)\n"
                 "     \"address\"     (string) bitcoin address\n"
                 "     ,...\n"
                 "  ],\n"
                 "  \"p2sh\",\"address\" (string) address of P2SH script "
                 "wrapping "
                 "this redeem script (not returned if the script is already a "
                 "P2SH).\n"
                 "}\n"},
             RPCExamples{HelpExampleCli("decodescript", "\"hexstring\"") +
                         HelpExampleRpc("decodescript", "\"hexstring\"")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     RPCTypeCheck(request.params, {UniValue::VSTR});
 
     UniValue r(UniValue::VOBJ);
     CScript script;
     if (request.params[0].get_str().size() > 0) {
         std::vector<uint8_t> scriptData(
             ParseHexV(request.params[0], "argument"));
         script = CScript(scriptData.begin(), scriptData.end());
     } else {
         // Empty scripts are valid.
     }
 
     ScriptPubKeyToUniv(script, r, false);
 
     UniValue type;
     type = find_value(r, "type");
 
     if (type.isStr() && type.get_str() != "scripthash") {
         // P2SH cannot be wrapped in a P2SH. If this script is already a P2SH,
         // don't return the address for a P2SH of the P2SH.
         r.pushKV("p2sh", EncodeDestination(CScriptID(script), config));
     }
 
     return r;
 }
 
 /**
  * Pushes a JSON object for script verification or signing errors to vErrorsRet.
  */
 static void TxInErrorToJSON(const CTxIn &txin, UniValue &vErrorsRet,
                             const std::string &strMessage) {
     UniValue entry(UniValue::VOBJ);
     entry.pushKV("txid", txin.prevout.GetTxId().ToString());
     entry.pushKV("vout", uint64_t(txin.prevout.GetN()));
     entry.pushKV("scriptSig",
                  HexStr(txin.scriptSig.begin(), txin.scriptSig.end()));
     entry.pushKV("sequence", uint64_t(txin.nSequence));
     entry.pushKV("error", strMessage);
     vErrorsRet.push_back(entry);
 }
 
 static UniValue combinerawtransaction(const Config &config,
                                       const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() != 1) {
         throw std::runtime_error(RPCHelpMan{
             "combinerawtransaction",
             "\nCombine multiple partially signed transactions into "
             "one transaction.\n"
             "The combined transaction may be another partially "
             "signed transaction or a \n"
             "fully signed transaction.",
             {
                 {
                     "txs",
                     RPCArg::Type::ARR,
                     /* opt */ false,
                     /* default_val */ "",
                     "A json array of hex strings of partially "
                     "signed transactions",
                     {
                         {"hexstring", RPCArg::Type::STR_HEX,
                          /* opt */ false, /* default_val */ "",
                          "A transaction hash"},
                     },
                 },
             },
             RPCResult{"\"hex\"            (string) The hex-encoded raw "
                       "transaction with signature(s)\n"},
             RPCExamples{HelpExampleCli("combinerawtransaction",
                                        "[\"myhex1\", \"myhex2\", \"myhex3\"]")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     UniValue txs = request.params[0].get_array();
     std::vector<CMutableTransaction> txVariants(txs.size());
 
     for (unsigned int idx = 0; idx < txs.size(); idx++) {
         if (!DecodeHexTx(txVariants[idx], txs[idx].get_str())) {
             throw JSONRPCError(RPC_DESERIALIZATION_ERROR,
                                strprintf("TX decode failed for tx %d", idx));
         }
     }
 
     if (txVariants.empty()) {
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Missing transactions");
     }
 
     // mergedTx will end up with all the signatures; it
     // starts as a clone of the rawtx:
     CMutableTransaction mergedTx(txVariants[0]);
 
     // Fetch previous transactions (inputs):
     CCoinsView viewDummy;
     CCoinsViewCache view(&viewDummy);
     {
         LOCK(cs_main);
         LOCK(g_mempool.cs);
         CCoinsViewCache &viewChain = *pcoinsTip;
         CCoinsViewMemPool viewMempool(&viewChain, g_mempool);
         // temporarily switch cache backend to db+mempool view
         view.SetBackend(viewMempool);
 
         for (const CTxIn &txin : mergedTx.vin) {
             // Load entries from viewChain into view; can fail.
             view.AccessCoin(txin.prevout);
         }
 
         // switch back to avoid locking mempool for too long
         view.SetBackend(viewDummy);
     }
 
     // Use CTransaction for the constant parts of the
     // transaction to avoid rehashing.
     const CTransaction txConst(mergedTx);
     // Sign what we can:
     for (size_t i = 0; i < mergedTx.vin.size(); i++) {
         CTxIn &txin = mergedTx.vin[i];
         const Coin &coin = view.AccessCoin(txin.prevout);
         if (coin.IsSpent()) {
             throw JSONRPCError(RPC_VERIFY_ERROR,
                                "Input not found or already spent");
         }
         SignatureData sigdata;
 
         const CTxOut &txout = coin.GetTxOut();
 
         // ... and merge in other signatures:
         for (const CMutableTransaction &txv : txVariants) {
             if (txv.vin.size() > i) {
                 sigdata.MergeSignatureData(DataFromTransaction(txv, i, txout));
             }
         }
         ProduceSignature(
             DUMMY_SIGNING_PROVIDER,
             MutableTransactionSignatureCreator(&mergedTx, i, txout.nValue),
             txout.scriptPubKey, sigdata);
 
         UpdateInput(txin, sigdata);
     }
 
     return EncodeHexTx(CTransaction(mergedTx));
 }
 
+// TODO(https://github.com/bitcoin/bitcoin/pull/10973#discussion_r267084237):
+// This function is called from both wallet and node rpcs
+// (signrawtransactionwithwallet and signrawtransactionwithkey). It should be
+// moved to a util file so wallet code doesn't need to link against node code.
+// Also the dependency on interfaces::Chain should be removed, so
+// signrawtransactionwithkey doesn't need access to a Chain instance.
 UniValue SignTransaction(interfaces::Chain &chain, CMutableTransaction &mtx,
                          const UniValue &prevTxsUnival,
                          CBasicKeyStore *keystore, bool is_temp_keystore,
                          const UniValue &hashType) {
     // Fetch previous transactions (inputs):
-    CCoinsView viewDummy;
-    CCoinsViewCache view(&viewDummy);
-    {
-        LOCK2(cs_main, g_mempool.cs);
-        CCoinsViewCache &viewChain = *pcoinsTip;
-        CCoinsViewMemPool viewMempool(&viewChain, g_mempool);
-        // Temporarily switch cache backend to db+mempool view.
-        view.SetBackend(viewMempool);
-
-        for (const CTxIn &txin : mtx.vin) {
-            // Load entries from viewChain into view; can fail.
-            view.AccessCoin(txin.prevout);
-        }
-
-        // Switch back to avoid locking mempool for too long.
-        view.SetBackend(viewDummy);
+    std::map<COutPoint, Coin> coins;
+    for (const CTxIn &txin : mtx.vin) {
+        coins[txin.prevout]; // Create empty map entry keyed by prevout.
     }
+    chain.findCoins(coins);
 
     // Add previous txouts given in the RPC call:
     if (!prevTxsUnival.isNull()) {
         UniValue prevTxs = prevTxsUnival.get_array();
         for (size_t idx = 0; idx < prevTxs.size(); ++idx) {
             const UniValue &p = prevTxs[idx];
             if (!p.isObject()) {
                 throw JSONRPCError(RPC_DESERIALIZATION_ERROR,
                                    "expected object with "
                                    "{\"txid'\",\"vout\",\"scriptPubKey\"}");
             }
 
             UniValue prevOut = p.get_obj();
 
             RPCTypeCheckObj(prevOut,
                             {
                                 {"txid", UniValueType(UniValue::VSTR)},
                                 {"vout", UniValueType(UniValue::VNUM)},
                                 {"scriptPubKey", UniValueType(UniValue::VSTR)},
                                 // "amount" is also required but check is done
                                 // below due to UniValue::VNUM erroneously
                                 // not accepting quoted numerics
                                 // (which are valid JSON)
                             });
 
             TxId txid(ParseHashO(prevOut, "txid"));
 
             int nOut = find_value(prevOut, "vout").get_int();
             if (nOut < 0) {
                 throw JSONRPCError(RPC_DESERIALIZATION_ERROR,
                                    "vout must be positive");
             }
 
             COutPoint out(txid, nOut);
             std::vector<uint8_t> pkData(ParseHexO(prevOut, "scriptPubKey"));
             CScript scriptPubKey(pkData.begin(), pkData.end());
 
             {
-                const Coin &coin = view.AccessCoin(out);
-                if (!coin.IsSpent() &&
-                    coin.GetTxOut().scriptPubKey != scriptPubKey) {
+                auto coin = coins.find(out);
+                if (coin != coins.end() && !coin->second.IsSpent() &&
+                    coin->second.GetTxOut().scriptPubKey != scriptPubKey) {
                     std::string err("Previous output scriptPubKey mismatch:\n");
-                    err = err + ScriptToAsmStr(coin.GetTxOut().scriptPubKey) +
+                    err = err +
+                          ScriptToAsmStr(coin->second.GetTxOut().scriptPubKey) +
                           "\nvs:\n" + ScriptToAsmStr(scriptPubKey);
                     throw JSONRPCError(RPC_DESERIALIZATION_ERROR, err);
                 }
 
                 CTxOut txout;
                 txout.scriptPubKey = scriptPubKey;
                 txout.nValue = Amount::zero();
                 if (prevOut.exists("amount")) {
                     txout.nValue =
                         AmountFromValue(find_value(prevOut, "amount"));
                 } else {
                     // amount param is required in replay-protected txs.
                     // Note that we must check for its presence here rather
                     // than use RPCTypeCheckObj() above, since UniValue::VNUM
                     // parser incorrectly parses numerics with quotes, eg
                     // "3.12" as a string when JSON allows it to also parse
                     // as numeric. And we have to accept numerics with quotes
                     // because our own dogfood (our rpc results) always
                     // produces decimal numbers that are quoted
                     // eg getbalance returns "3.14152" rather than 3.14152
                     throw JSONRPCError(RPC_INVALID_PARAMETER, "Missing amount");
                 }
-
-                view.AddCoin(out, Coin(txout, 1, false), true);
+                coins[out] = Coin(txout, 1, false);
             }
 
             // If redeemScript and private keys were given, add redeemScript to
             // the keystore so it can be signed
             if (is_temp_keystore && scriptPubKey.IsPayToScriptHash()) {
                 RPCTypeCheckObj(
                     prevOut, {
                                  {"redeemScript", UniValueType(UniValue::VSTR)},
                              });
                 UniValue v = find_value(prevOut, "redeemScript");
                 if (!v.isNull()) {
                     std::vector<uint8_t> rsData(ParseHexV(v, "redeemScript"));
                     CScript redeemScript(rsData.begin(), rsData.end());
                     keystore->AddCScript(redeemScript);
                 }
             }
         }
     }
 
     SigHashType sigHashType = ParseSighashString(hashType);
     if (!sigHashType.hasForkId()) {
         throw JSONRPCError(RPC_INVALID_PARAMETER,
                            "Signature must use SIGHASH_FORKID");
     }
 
     // Script verification errors.
     UniValue vErrors(UniValue::VARR);
 
     // Use CTransaction for the constant parts of the transaction to avoid
     // rehashing.
     const CTransaction txConst(mtx);
     // Sign what we can:
     for (size_t i = 0; i < mtx.vin.size(); i++) {
         CTxIn &txin = mtx.vin[i];
-        const Coin &coin = view.AccessCoin(txin.prevout);
-        if (coin.IsSpent()) {
+        auto coin = coins.find(txin.prevout);
+        if (coin == coins.end() || coin->second.IsSpent()) {
             TxInErrorToJSON(txin, vErrors, "Input not found or already spent");
             continue;
         }
 
-        const CScript &prevPubKey = coin.GetTxOut().scriptPubKey;
-        const Amount amount = coin.GetTxOut().nValue;
+        const CScript &prevPubKey = coin->second.GetTxOut().scriptPubKey;
+        const Amount amount = coin->second.GetTxOut().nValue;
 
-        SignatureData sigdata = DataFromTransaction(mtx, i, coin.GetTxOut());
+        SignatureData sigdata =
+            DataFromTransaction(mtx, i, coin->second.GetTxOut());
         // Only sign SIGHASH_SINGLE if there's a corresponding output:
         if ((sigHashType.getBaseType() != BaseSigHashType::SINGLE) ||
             (i < mtx.vout.size())) {
             ProduceSignature(*keystore,
                              MutableTransactionSignatureCreator(&mtx, i, amount,
                                                                 sigHashType),
                              prevPubKey, sigdata);
         }
 
         UpdateInput(txin, sigdata);
 
         ScriptError serror = ScriptError::OK;
         if (!VerifyScript(
                 txin.scriptSig, prevPubKey, STANDARD_SCRIPT_VERIFY_FLAGS,
                 TransactionSignatureChecker(&txConst, i, amount), &serror)) {
             if (serror == ScriptError::INVALID_STACK_OPERATION) {
                 // Unable to sign input and verification failed (possible
                 // attempt to partially sign).
                 TxInErrorToJSON(txin, vErrors,
                                 "Unable to sign input, invalid stack size "
                                 "(possibly missing key)");
             } else {
                 TxInErrorToJSON(txin, vErrors, ScriptErrorString(serror));
             }
         }
     }
 
     bool fComplete = vErrors.empty();
 
     UniValue result(UniValue::VOBJ);
     result.pushKV("hex", EncodeHexTx(CTransaction(mtx)));
     result.pushKV("complete", fComplete);
     if (!vErrors.empty()) {
         result.pushKV("errors", vErrors);
     }
 
     return result;
 }
 
 static UniValue signrawtransactionwithkey(const Config &config,
                                           const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() < 2 ||
         request.params.size() > 4) {
         throw std::runtime_error(RPCHelpMan{
             "signrawtransactionwithkey",
             "\nSign inputs for raw transaction (serialized, hex-encoded).\n"
             "The second argument is an array of base58-encoded private\n"
             "keys that will be the only keys used to sign the "
             "transaction.\n"
             "The third optional argument (may be null) is an array of "
             "previous transaction outputs that\n"
             "this transaction depends on but may not yet be in the block "
             "chain.\n",
             {
                 {"hexstring", RPCArg::Type::STR_HEX, /* opt */ false,
                  /* default_val */ "", "The transaction hex string"},
                 {
                     "privkeys",
                     RPCArg::Type::ARR,
                     /* opt */ false,
                     /* default_val */ "",
                     "A json array of base58-encoded private keys for "
                     "signing",
                     {
                         {"privatekey", RPCArg::Type::STR,
                          /* opt */ false, /* default_val */ "",
                          "private key in base58-encoding"},
                     },
                 },
                 {
                     "prevtxs",
                     RPCArg::Type::ARR,
                     /* opt */ true,
                     /* default_val */ "",
                     "A json array of previous dependent transaction "
                     "outputs",
                     {
                         {
                             "",
                             RPCArg::Type::OBJ,
                             /* opt */ true,
                             /* default_val */ "",
                             "",
                             {
                                 {"txid", RPCArg::Type::STR_HEX,
                                  /* opt */ false, /* default_val */ "",
                                  "The transaction id"},
                                 {"vout", RPCArg::Type::NUM, /* opt */ false,
                                  /* default_val */ "", "The output number"},
                                 {"scriptPubKey", RPCArg::Type::STR_HEX,
                                  /* opt */ false, /* default_val */ "",
                                  "script key"},
                                 {"redeemScript", RPCArg::Type::STR_HEX,
                                  /* opt */ true, /* default_val */ "",
                                  "(required for P2SH) redeem script"},
                                 {"amount", RPCArg::Type::AMOUNT,
                                  /* opt */ false, /* default_val */ "",
                                  "The amount spent"},
                             },
                         },
                     },
                 },
                 {"sighashtype", RPCArg::Type::STR, /* opt */ true,
                  /* default_val */ "ALL|FORKID",
                  "The signature hash type. Must be one of:\n"
                  "       \"ALL|FORKID\"\n"
                  "       \"NONE|FORKID\"\n"
                  "       \"SINGLE|FORKID\"\n"
                  "       \"ALL|FORKID|ANYONECANPAY\"\n"
                  "       \"NONE|FORKID|ANYONECANPAY\"\n"
                  "       \"SINGLE|FORKID|ANYONECANPAY\""},
             },
             RPCResult{"{\n"
                       "  \"hex\" : \"value\",                  (string) The "
                       "hex-encoded raw transaction with signature(s)\n"
                       "  \"complete\" : true|false,          (boolean) If the "
                       "transaction has a complete set of signatures\n"
                       "  \"errors\" : [                      (json array of "
                       "objects) Script verification errors (if there are any)\n"
                       "    {\n"
                       "      \"txid\" : \"hash\",              (string) The "
                       "hash of the referenced, previous transaction\n"
                       "      \"vout\" : n,                   (numeric) The "
                       "index of the output to spent and used as input\n"
                       "      \"scriptSig\" : \"hex\",          (string) The "
                       "hex-encoded signature script\n"
                       "      \"sequence\" : n,               (numeric) Script "
                       "sequence number\n"
                       "      \"error\" : \"text\"              (string) "
                       "Verification or signing error related to the input\n"
                       "    }\n"
                       "    ,...\n"
                       "  ]\n"
                       "}\n"},
             RPCExamples{
                 HelpExampleCli("signrawtransactionwithkey", "\"myhex\"") +
                 HelpExampleRpc("signrawtransactionwithkey", "\"myhex\"")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     RPCTypeCheck(
         request.params,
         {UniValue::VSTR, UniValue::VARR, UniValue::VARR, UniValue::VSTR}, true);
 
     CMutableTransaction mtx;
     if (!DecodeHexTx(mtx, request.params[0].get_str())) {
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
     }
 
     CBasicKeyStore keystore;
     const UniValue &keys = request.params[1].get_array();
     for (size_t idx = 0; idx < keys.size(); ++idx) {
         UniValue k = keys[idx];
         CKey key = DecodeSecret(k.get_str());
         if (!key.IsValid()) {
             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                "Invalid private key");
         }
         keystore.AddKey(key);
     }
 
     return SignTransaction(*g_rpc_interfaces->chain, mtx, request.params[2],
                            &keystore, true, request.params[3]);
 }
 
 static UniValue sendrawtransaction(const Config &config,
                                    const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 2) {
         throw std::runtime_error(RPCHelpMan{
             "sendrawtransaction",
             "\nSubmits raw transaction (serialized, hex-encoded) to "
             "local node and network.\n"
             "\nAlso see createrawtransaction and "
             "signrawtransactionwithkey calls.\n",
             {
                 {"hexstring", RPCArg::Type::STR_HEX, /* opt */ false,
                  /* default_val */ "", "The hex string of the raw transaction"},
                 {"allowhighfees", RPCArg::Type::BOOL, /* opt */ true,
                  /* default_val */ "false", "Allow high fees"},
             },
             RPCResult{
                 "\"hex\"             (string) The transaction hash in hex\n"},
             RPCExamples{
                 "\nCreate a transaction\n" +
                 HelpExampleCli(
                     "createrawtransaction",
                     "\"[{\\\"txid\\\" : \\\"mytxid\\\",\\\"vout\\\":0}]\" "
                     "\"{\\\"myaddress\\\":0.01}\"") +
                 "Sign the transaction, and get back the hex\n" +
                 HelpExampleCli("signrawtransactionwithwallet", "\"myhex\"") +
                 "\nSend the transaction (signed hex)\n" +
                 HelpExampleCli("sendrawtransaction", "\"signedhex\"") +
                 "\nAs a JSON-RPC call\n" +
                 HelpExampleRpc("sendrawtransaction", "\"signedhex\"")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     RPCTypeCheck(request.params, {UniValue::VSTR, UniValue::VBOOL});
 
     // parse hex string from parameter
     CMutableTransaction mtx;
     if (!DecodeHexTx(mtx, request.params[0].get_str())) {
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
     }
 
     CTransactionRef tx(MakeTransactionRef(std::move(mtx)));
 
     bool allowhighfees = false;
     if (!request.params[1].isNull()) {
         allowhighfees = request.params[1].get_bool();
     }
 
     TxId txid;
     TransactionError err;
     std::string err_string;
     if (!BroadcastTransaction(config, tx, txid, err, err_string,
                               allowhighfees)) {
         throw JSONRPCTransactionError(err, err_string);
     }
 
     return txid.GetHex();
 }
 
 static UniValue testmempoolaccept(const Config &config,
                                   const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 2) {
         throw std::runtime_error(RPCHelpMan{
             "testmempoolaccept",
             "\nReturns if raw transaction (serialized, hex-encoded) "
             "would be accepted by mempool.\n"
             "\nThis checks if the transaction violates the "
             "consensus or policy rules.\n"
             "\nSee sendrawtransaction call.\n",
             {
                 {
                     "rawtxs",
                     RPCArg::Type::ARR,
                     /* opt */ false,
                     /* default_val */ "",
                     "An array of hex strings of raw transactions.\n"
                     "                                        Length "
                     "must be one for now.",
                     {
                         {"rawtx", RPCArg::Type::STR_HEX,
                          /* opt */ false, /* default_val */ "", ""},
                     },
                 },
                 {"allowhighfees", RPCArg::Type::BOOL, /* opt */ true,
                  /* default_val */ "false", "Allow high fees"},
             },
             RPCResult{
                 "[                   (array) The result of the mempool "
                 "acceptance test for each raw transaction in the input array.\n"
                 "                            Length is exactly one for now.\n"
                 " {\n"
                 "  \"txid\"           (string) The transaction hash in hex\n"
                 "  \"allowed\"        (boolean) If the mempool allows this tx "
                 "to be inserted\n"
                 "  \"reject-reason\"  (string) Rejection string (only present "
                 "when 'allowed' is false)\n"
                 " }\n"
                 "]\n"},
             RPCExamples{
                 "\nCreate a transaction\n" +
                 HelpExampleCli(
                     "createrawtransaction",
                     "\"[{\\\"txid\\\" : \\\"mytxid\\\",\\\"vout\\\":0}]\" "
                     "\"{\\\"myaddress\\\":0.01}\"") +
                 "Sign the transaction, and get back the hex\n" +
                 HelpExampleCli("signrawtransactionwithwallet", "\"myhex\"") +
                 "\nTest acceptance of the transaction (signed hex)\n" +
                 HelpExampleCli("testmempoolaccept", "[\"signedhex\"]") +
                 "\nAs a JSON-RPC call\n" +
                 HelpExampleRpc("testmempoolaccept", "[\"signedhex\"]")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     RPCTypeCheck(request.params, {UniValue::VARR, UniValue::VBOOL});
     if (request.params[0].get_array().size() != 1) {
         throw JSONRPCError(
             RPC_INVALID_PARAMETER,
             "Array must contain exactly one raw transaction for now");
     }
 
     CMutableTransaction mtx;
     if (!DecodeHexTx(mtx, request.params[0].get_array()[0].get_str())) {
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
     }
     CTransactionRef tx(MakeTransactionRef(std::move(mtx)));
     const uint256 &txid = tx->GetId();
 
     Amount max_raw_tx_fee = maxTxFee;
     if (!request.params[1].isNull() && request.params[1].get_bool()) {
         max_raw_tx_fee = Amount::zero();
     }
 
     UniValue result(UniValue::VARR);
     UniValue result_0(UniValue::VOBJ);
     result_0.pushKV("txid", txid.GetHex());
 
     CValidationState state;
     bool missing_inputs;
     bool test_accept_res;
     {
         LOCK(cs_main);
         test_accept_res = AcceptToMemoryPool(
             config, g_mempool, state, std::move(tx), &missing_inputs,
             false /* bypass_limits */, max_raw_tx_fee, true /* test_accept */);
     }
     result_0.pushKV("allowed", test_accept_res);
     if (!test_accept_res) {
         if (state.IsInvalid()) {
             result_0.pushKV("reject-reason",
                             strprintf("%i: %s", state.GetRejectCode(),
                                       state.GetRejectReason()));
         } else if (missing_inputs) {
             result_0.pushKV("reject-reason", "missing-inputs");
         } else {
             result_0.pushKV("reject-reason", state.GetRejectReason());
         }
     }
 
     result.push_back(std::move(result_0));
     return result;
 }
 
 static std::string WriteHDKeypath(std::vector<uint32_t> &keypath) {
     std::string keypath_str = "m";
     for (uint32_t num : keypath) {
         keypath_str += "/";
         bool hardened = false;
         if (num & 0x80000000) {
             hardened = true;
             num &= ~0x80000000;
         }
 
         keypath_str += std::to_string(num);
         if (hardened) {
             keypath_str += "'";
         }
     }
     return keypath_str;
 }
 
 static UniValue decodepsbt(const Config &config,
                            const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() != 1) {
         throw std::runtime_error(RPCHelpMan{
             "decodepsbt",
             "\nReturn a JSON object representing the serialized, "
             "base64-encoded partially signed Bitcoin transaction.\n",
             {
                 {"psbt", RPCArg::Type::STR, /* opt */ false,
                  /* default_val */ "", "The PSBT base64 string"},
             },
             RPCResult{
                 "{\n"
                 "  \"tx\" : {                   (json object) The decoded "
                 "network-serialized unsigned transaction.\n"
                 "    ...                                      The layout is "
                 "the same as the output of decoderawtransaction.\n"
                 "  },\n"
                 "  \"unknown\" : {                (json object) The unknown "
                 "global fields\n"
                 "    \"key\" : \"value\"            (key-value pair) An "
                 "unknown key-value pair\n"
                 "     ...\n"
                 "  },\n"
                 "  \"inputs\" : [                 (array of json objects)\n"
                 "    {\n"
                 "      \"utxo\" : {            (json object, optional) "
                 "Transaction output for UTXOs\n"
                 "        \"amount\" : x.xxx,           (numeric) The value "
                 "in " +
                 CURRENCY_UNIT +
                 "\n"
                 "        \"scriptPubKey\" : {          (json object)\n"
                 "          \"asm\" : \"asm\",            (string) The asm\n"
                 "          \"hex\" : \"hex\",            (string) The hex\n"
                 "          \"type\" : \"pubkeyhash\",    (string) The type, eg "
                 "'pubkeyhash'\n"
                 "          \"address\" : \"address\"     (string) Bitcoin "
                 "address if there is one\n"
                 "        }\n"
                 "      },\n"
                 "      \"partial_signatures\" : {             (json object, "
                 "optional)\n"
                 "        \"pubkey\" : \"signature\",           (string) The "
                 "public key and signature that corresponds to it.\n"
                 "        ,...\n"
                 "      }\n"
                 "      \"sighash\" : \"type\",                  (string, "
                 "optional) The sighash type to be used\n"
                 "      \"redeem_script\" : {       (json object, optional)\n"
                 "          \"asm\" : \"asm\",            (string) The asm\n"
                 "          \"hex\" : \"hex\",            (string) The hex\n"
                 "          \"type\" : \"pubkeyhash\",    (string) The type, eg "
                 "'pubkeyhash'\n"
                 "        }\n"
                 "      \"bip32_derivs\" : {          (json object, optional)\n"
                 "        \"pubkey\" : {                     (json object, "
                 "optional) The public key with the derivation path as the "
                 "value.\n"
                 "          \"master_fingerprint\" : \"fingerprint\"     "
                 "(string) The fingerprint of the master key\n"
                 "          \"path\" : \"path\",                         "
                 "(string) The path\n"
                 "        }\n"
                 "        ,...\n"
                 "      }\n"
                 "      \"final_scriptsig\" : {       (json object, optional)\n"
                 "          \"asm\" : \"asm\",            (string) The asm\n"
                 "          \"hex\" : \"hex\",            (string) The hex\n"
                 "        }\n"
                 "      \"unknown\" : {                (json object) The "
                 "unknown global fields\n"
                 "        \"key\" : \"value\"            (key-value pair) An "
                 "unknown key-value pair\n"
                 "         ...\n"
                 "      },\n"
                 "    }\n"
                 "    ,...\n"
                 "  ]\n"
                 "  \"outputs\" : [                 (array of json objects)\n"
                 "    {\n"
                 "      \"redeem_script\" : {       (json object, optional)\n"
                 "          \"asm\" : \"asm\",            (string) The asm\n"
                 "          \"hex\" : \"hex\",            (string) The hex\n"
                 "          \"type\" : \"pubkeyhash\",    (string) The type, eg "
                 "'pubkeyhash'\n"
                 "        }\n"
                 "      \"bip32_derivs\" : [          (array of json objects, "
                 "optional)\n"
                 "        {\n"
                 "          \"pubkey\" : \"pubkey\",                     "
                 "(string) The public key this path corresponds to\n"
                 "          \"master_fingerprint\" : \"fingerprint\"     "
                 "(string) The fingerprint of the master key\n"
                 "          \"path\" : \"path\",                         "
                 "(string) The path\n"
                 "          }\n"
                 "        }\n"
                 "        ,...\n"
                 "      ],\n"
                 "      \"unknown\" : {                (json object) The "
                 "unknown global fields\n"
                 "        \"key\" : \"value\"            (key-value pair) An "
                 "unknown key-value pair\n"
                 "         ...\n"
                 "      },\n"
                 "    }\n"
                 "    ,...\n"
                 "  ]\n"
                 "  \"fee\" : fee                      (numeric, optional) The "
                 "transaction fee paid if all UTXOs slots in the PSBT have been "
                 "filled.\n"
                 "}\n"},
             RPCExamples{HelpExampleCli("decodepsbt", "\"psbt\"")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     RPCTypeCheck(request.params, {UniValue::VSTR});
 
     // Unserialize the transactions
     PartiallySignedTransaction psbtx;
     std::string error;
     if (!DecodeBase64PSBT(psbtx, request.params[0].get_str(), error)) {
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR,
                            strprintf("TX decode failed %s", error));
     }
 
     UniValue result(UniValue::VOBJ);
 
     // Add the decoded tx
     UniValue tx_univ(UniValue::VOBJ);
     TxToUniv(CTransaction(*psbtx.tx), uint256(), tx_univ, false);
     result.pushKV("tx", tx_univ);
 
     // Unknown data
     if (psbtx.unknown.size() > 0) {
         UniValue unknowns(UniValue::VOBJ);
         for (auto entry : psbtx.unknown) {
             unknowns.pushKV(HexStr(entry.first), HexStr(entry.second));
         }
         result.pushKV("unknown", unknowns);
     }
 
     // inputs
     Amount total_in = Amount::zero();
     bool have_all_utxos = true;
     UniValue inputs(UniValue::VARR);
     for (size_t i = 0; i < psbtx.inputs.size(); ++i) {
         const PSBTInput &input = psbtx.inputs[i];
         UniValue in(UniValue::VOBJ);
         // UTXOs
         if (!input.utxo.IsNull()) {
             const CTxOut &txout = input.utxo;
 
             UniValue out(UniValue::VOBJ);
 
             out.pushKV("amount", ValueFromAmount(txout.nValue));
             total_in += txout.nValue;
 
             UniValue o(UniValue::VOBJ);
             ScriptToUniv(txout.scriptPubKey, o, true);
             out.pushKV("scriptPubKey", o);
             in.pushKV("utxo", out);
         } else {
             have_all_utxos = false;
         }
 
         // Partial sigs
         if (!input.partial_sigs.empty()) {
             UniValue partial_sigs(UniValue::VOBJ);
             for (const auto &sig : input.partial_sigs) {
                 partial_sigs.pushKV(HexStr(sig.second.first),
                                     HexStr(sig.second.second));
             }
             in.pushKV("partial_signatures", partial_sigs);
         }
 
         // Sighash
         uint8_t sighashbyte = input.sighash_type.getRawSigHashType() & 0xff;
         if (sighashbyte > 0) {
             in.pushKV("sighash", SighashToStr(sighashbyte));
         }
 
         // Redeem script
         if (!input.redeem_script.empty()) {
             UniValue r(UniValue::VOBJ);
             ScriptToUniv(input.redeem_script, r, false);
             in.pushKV("redeem_script", r);
         }
 
         // keypaths
         if (!input.hd_keypaths.empty()) {
             UniValue keypaths(UniValue::VARR);
             for (auto entry : input.hd_keypaths) {
                 UniValue keypath(UniValue::VOBJ);
                 keypath.pushKV("pubkey", HexStr(entry.first));
 
                 keypath.pushKV(
                     "master_fingerprint",
                     strprintf("%08x", ReadBE32(entry.second.fingerprint)));
                 keypath.pushKV("path", WriteHDKeypath(entry.second.path));
                 keypaths.push_back(keypath);
             }
             in.pushKV("bip32_derivs", keypaths);
         }
 
         // Final scriptSig
         if (!input.final_script_sig.empty()) {
             UniValue scriptsig(UniValue::VOBJ);
             scriptsig.pushKV("asm",
                              ScriptToAsmStr(input.final_script_sig, true));
             scriptsig.pushKV("hex", HexStr(input.final_script_sig));
             in.pushKV("final_scriptSig", scriptsig);
         }
 
         // Unknown data
         if (input.unknown.size() > 0) {
             UniValue unknowns(UniValue::VOBJ);
             for (auto entry : input.unknown) {
                 unknowns.pushKV(HexStr(entry.first), HexStr(entry.second));
             }
             in.pushKV("unknown", unknowns);
         }
 
         inputs.push_back(in);
     }
     result.pushKV("inputs", inputs);
 
     // outputs
     Amount output_value = Amount::zero();
     UniValue outputs(UniValue::VARR);
     for (size_t i = 0; i < psbtx.outputs.size(); ++i) {
         const PSBTOutput &output = psbtx.outputs[i];
         UniValue out(UniValue::VOBJ);
         // Redeem script
         if (!output.redeem_script.empty()) {
             UniValue r(UniValue::VOBJ);
             ScriptToUniv(output.redeem_script, r, false);
             out.pushKV("redeem_script", r);
         }
 
         // keypaths
         if (!output.hd_keypaths.empty()) {
             UniValue keypaths(UniValue::VARR);
             for (auto entry : output.hd_keypaths) {
                 UniValue keypath(UniValue::VOBJ);
                 keypath.pushKV("pubkey", HexStr(entry.first));
                 keypath.pushKV(
                     "master_fingerprint",
                     strprintf("%08x", ReadBE32(entry.second.fingerprint)));
                 keypath.pushKV("path", WriteHDKeypath(entry.second.path));
                 keypaths.push_back(keypath);
             }
             out.pushKV("bip32_derivs", keypaths);
         }
 
         // Unknown data
         if (output.unknown.size() > 0) {
             UniValue unknowns(UniValue::VOBJ);
             for (auto entry : output.unknown) {
                 unknowns.pushKV(HexStr(entry.first), HexStr(entry.second));
             }
             out.pushKV("unknown", unknowns);
         }
 
         outputs.push_back(out);
 
         // Fee calculation
         output_value += psbtx.tx->vout[i].nValue;
     }
     result.pushKV("outputs", outputs);
     if (have_all_utxos) {
         result.pushKV("fee", ValueFromAmount(total_in - output_value));
     }
 
     return result;
 }
 
 static UniValue combinepsbt(const Config &config,
                             const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() != 1) {
         throw std::runtime_error(RPCHelpMan{
             "combinepsbt",
             "\nCombine multiple partially signed Bitcoin transactions into "
             "one transaction.\n"
             "Implements the Combiner role.\n",
             {
                 {
                     "txs",
                     RPCArg::Type::ARR,
                     /* opt */ false,
                     /* default_val */ "",
                     "A json array of base64 strings of partially signed "
                     "transactions",
                     {
                         {"psbt", RPCArg::Type::STR, /* opt */ false,
                          /* default_val */ "", "A base64 string of a PSBT"},
                     },
                 },
             },
             RPCResult{"  \"psbt\"          (string) The base64-encoded "
                       "partially signed transaction\n"},
             RPCExamples{HelpExampleCli(
                 "combinepsbt",
                 "[\"mybase64_1\", \"mybase64_2\", \"mybase64_3\"]")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     RPCTypeCheck(request.params, {UniValue::VARR}, true);
 
     // Unserialize the transactions
     std::vector<PartiallySignedTransaction> psbtxs;
     UniValue txs = request.params[0].get_array();
     for (size_t i = 0; i < txs.size(); ++i) {
         PartiallySignedTransaction psbtx;
         std::string error;
         if (!DecodeBase64PSBT(psbtx, txs[i].get_str(), error)) {
             throw JSONRPCError(RPC_DESERIALIZATION_ERROR,
                                strprintf("TX decode failed %s", error));
         }
         psbtxs.push_back(psbtx);
     }
 
     PartiallySignedTransaction merged_psbt;
     TransactionError error;
     if (!CombinePSBTs(merged_psbt, error, psbtxs)) {
         throw JSONRPCTransactionError(error);
     }
 
     UniValue result(UniValue::VOBJ);
     CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
     ssTx << merged_psbt;
     return EncodeBase64((uint8_t *)ssTx.data(), ssTx.size());
 }
 
 static UniValue finalizepsbt(const Config &config,
                              const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 2) {
         throw std::runtime_error(RPCHelpMan{
             "finalizepsbt",
             "Finalize the inputs of a PSBT. If the transaction is "
             "fully signed, it will produce a\n"
             "network serialized transaction which can be broadcast "
             "with sendrawtransaction. Otherwise a PSBT will be\n"
             "created which has the final_scriptSigfields filled for "
             "inputs that are complete.\n"
             "Implements the Finalizer and Extractor roles.\n",
             {
                 {"psbt", RPCArg::Type::STR, /* opt */ false,
                  /* default_val */ "", "A base64 string of a PSBT"},
                 {"extract", RPCArg::Type::BOOL, /* opt */ true,
                  /* default_val */ "true",
                  "If true and the transaction is complete,\n"
                  "                             extract and return "
                  "the complete transaction in normal network "
                  "serialization instead of the PSBT."},
             },
             RPCResult{
                 "{\n"
                 "  \"psbt\" : \"value\",          (string) The base64-encoded "
                 "partially signed transaction if not extracted\n"
                 "  \"hex\" : \"value\",           (string) The hex-encoded "
                 "network transaction if extracted\n"
                 "  \"complete\" : true|false,   (boolean) If the transaction "
                 "has a complete set of signatures\n"
                 "  ]\n"
                 "}\n"},
             RPCExamples{HelpExampleCli("finalizepsbt", "\"psbt\"")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     RPCTypeCheck(request.params, {UniValue::VSTR, UniValue::VBOOL}, true);
 
     // Unserialize the transactions
     PartiallySignedTransaction psbtx;
     std::string error;
     if (!DecodeBase64PSBT(psbtx, request.params[0].get_str(), error)) {
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR,
                            strprintf("TX decode failed %s", error));
     }
 
     bool extract = request.params[1].isNull() || (!request.params[1].isNull() &&
                                                   request.params[1].get_bool());
 
     CMutableTransaction mtx;
     bool complete = FinalizeAndExtractPSBT(psbtx, mtx);
 
     UniValue result(UniValue::VOBJ);
     CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
     std::string result_str;
 
     if (complete && extract) {
         ssTx << mtx;
         result_str = HexStr(ssTx.str());
         result.pushKV("hex", result_str);
     } else {
         ssTx << psbtx;
         result_str = EncodeBase64(ssTx.str());
         result.pushKV("psbt", result_str);
     }
     result.pushKV("complete", complete);
 
     return result;
 }
 
 static UniValue createpsbt(const Config &config,
                            const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() < 2 ||
         request.params.size() > 3) {
         throw std::runtime_error(RPCHelpMan{
             "createpsbt",
             "\nCreates a transaction in the Partially Signed "
             "Transaction format.\n"
             "Implements the Creator role.\n",
             {
                 {
                     "inputs",
                     RPCArg::Type::ARR,
                     /* opt */ false,
                     /* default_val */ "",
                     "A json array of json objects",
                     {
                         {
                             "",
                             RPCArg::Type::OBJ,
                             /* opt */ false,
                             /* default_val */ "",
                             "",
                             {
                                 {"txid", RPCArg::Type::STR_HEX,
                                  /* opt */ false, /* default_val */ "",
                                  "The transaction id"},
                                 {"vout", RPCArg::Type::NUM, /* opt */ false,
                                  /* default_val */ "", "The output number"},
                                 {"sequence", RPCArg::Type::NUM,
                                  /* opt */ true, /* default_val */ "",
                                  "The sequence number"},
                             },
                         },
                     },
                 },
                 {
                     "outputs",
                     RPCArg::Type::ARR,
                     /* opt */ false,
                     /* default_val */ "",
                     "a json array with outputs (key-value pairs).\n"
                     "For compatibility reasons, a dictionary, which holds "
                     "the key-value pairs directly, is also\n"
                     "                             accepted as second "
                     "parameter.",
                     {
                         {
                             "",
                             RPCArg::Type::OBJ,
                             /* opt */ true,
                             /* default_val */ "",
                             "",
                             {
                                 {"address", RPCArg::Type::AMOUNT,
                                  /* opt */ false, /* default_val */ "",
                                  "A key-value pair. The key (string) is "
                                  "the bitcoin address, the value (float or "
                                  "string) is the amount in " +
                                      CURRENCY_UNIT},
                             },
                         },
                         {
                             "",
                             RPCArg::Type::OBJ,
                             /* opt */ true,
                             /* default_val */ "",
                             "",
                             {
                                 {"data", RPCArg::Type::STR_HEX,
                                  /* opt */ false, /* default_val */ "",
                                  "A key-value pair. The key must be "
                                  "\"data\", the value is hex-encoded data"},
                             },
                         },
                     },
                 },
                 {"locktime", RPCArg::Type::NUM, /* opt */ true,
                  /* default_val */ "0",
                  "Raw locktime. Non-0 value also locktime-activates "
                  "inputs"},
             },
             RPCResult{"  \"psbt\"        (string)  The resulting raw "
                       "transaction (base64-encoded string)\n"},
             RPCExamples{HelpExampleCli(
                 "createpsbt", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]"
                               "\" \"[{\\\"data\\\":\\\"00010203\\\"}]\"")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     RPCTypeCheck(request.params,
                  {
                      UniValue::VARR,
                      UniValueType(), // ARR or OBJ, checked later
                      UniValue::VNUM,
                  },
                  true);
 
     CMutableTransaction rawTx =
         ConstructTransaction(config.GetChainParams(), request.params[0],
                              request.params[1], request.params[2]);
 
     // Make a blank psbt
     PartiallySignedTransaction psbtx;
     psbtx.tx = rawTx;
     for (size_t i = 0; i < rawTx.vin.size(); ++i) {
         psbtx.inputs.push_back(PSBTInput());
     }
     for (size_t i = 0; i < rawTx.vout.size(); ++i) {
         psbtx.outputs.push_back(PSBTOutput());
     }
 
     // Serialize the PSBT
     CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
     ssTx << psbtx;
 
     return EncodeBase64((uint8_t *)ssTx.data(), ssTx.size());
 }
 
 static UniValue converttopsbt(const Config &config,
                               const JSONRPCRequest &request) {
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 2) {
         throw std::runtime_error(RPCHelpMan{
             "converttopsbt",
             "\nConverts a network serialized transaction to a PSBT. "
             "This should be used only with createrawtransaction and "
             "fundrawtransaction\n"
             "createpsbt and walletcreatefundedpsbt should be used "
             "for new applications.\n",
             {
                 {"hexstring", RPCArg::Type::STR_HEX, /* opt */ false,
                  /* default_val */ "", "The hex string of a raw transaction"},
                 {"permitsigdata", RPCArg::Type::BOOL, /* opt */ true,
                  /* default_val */ "false",
                  "If true, any signatures in the input will be discarded "
                  "and conversion.\n"
                  "                              will continue. If false, "
                  "RPC will fail if any signatures are present."},
             },
             RPCResult{"  \"psbt\"        (string)  The resulting raw "
                       "transaction (base64-encoded string)\n"},
             RPCExamples{
                 "\nCreate a transaction\n" +
                 HelpExampleCli("createrawtransaction",
                                "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]"
                                "\" \"[{\\\"data\\\":\\\"00010203\\\"}]\"") +
                 "\nConvert the transaction to a PSBT\n" +
                 HelpExampleCli("converttopsbt", "\"rawtransaction\"")},
         }
                                      .ToStringWithResultsAndExamples());
     }
 
     RPCTypeCheck(request.params, {UniValue::VSTR, UniValue::VBOOL}, true);
 
     // parse hex string from parameter
     CMutableTransaction tx;
     if (!DecodeHexTx(tx, request.params[0].get_str())) {
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
     }
 
     // Remove all scriptSigs from inputs
     for (CTxIn &input : tx.vin) {
         if (!input.scriptSig.empty() &&
             (request.params[1].isNull() ||
              (!request.params[1].isNull() && request.params[1].get_bool()))) {
             throw JSONRPCError(RPC_DESERIALIZATION_ERROR,
                                "Inputs must not have scriptSigs");
         }
         input.scriptSig.clear();
     }
 
     // Make a blank psbt
     PartiallySignedTransaction psbtx;
     psbtx.tx = tx;
     for (size_t i = 0; i < tx.vin.size(); ++i) {
         psbtx.inputs.push_back(PSBTInput());
     }
     for (size_t i = 0; i < tx.vout.size(); ++i) {
         psbtx.outputs.push_back(PSBTOutput());
     }
 
     // Serialize the PSBT
     CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
     ssTx << psbtx;
 
     return EncodeBase64((uint8_t *)ssTx.data(), ssTx.size());
 }
 
 // clang-format off
 static const CRPCCommand commands[] = {
     //  category            name                         actor (function)           argNames
     //  ------------------- ------------------------     ----------------------     ----------
     { "rawtransactions",    "getrawtransaction",         getrawtransaction,         {"txid","verbose","blockhash"} },
     { "rawtransactions",    "createrawtransaction",      createrawtransaction,      {"inputs","outputs","locktime"} },
     { "rawtransactions",    "decoderawtransaction",      decoderawtransaction,      {"hexstring"} },
     { "rawtransactions",    "decodescript",              decodescript,              {"hexstring"} },
     { "rawtransactions",    "sendrawtransaction",        sendrawtransaction,        {"hexstring","allowhighfees"} },
     { "rawtransactions",    "combinerawtransaction",     combinerawtransaction,     {"txs"} },
     { "rawtransactions",    "signrawtransactionwithkey", signrawtransactionwithkey, {"hexstring","privkeys","prevtxs","sighashtype"} },
     { "rawtransactions",    "testmempoolaccept",         testmempoolaccept,         {"rawtxs","allowhighfees"} },
     { "rawtransactions",    "decodepsbt",                decodepsbt,                {"psbt"} },
     { "rawtransactions",    "combinepsbt",               combinepsbt,               {"txs"} },
     { "rawtransactions",    "finalizepsbt",              finalizepsbt,              {"psbt", "extract"} },
     { "rawtransactions",    "createpsbt",                createpsbt,                {"inputs","outputs","locktime"} },
     { "rawtransactions",    "converttopsbt",             converttopsbt,             {"hexstring","permitsigdata"} },
 
     { "blockchain",         "gettxoutproof",             gettxoutproof,             {"txids", "blockhash"} },
     { "blockchain",         "verifytxoutproof",          verifytxoutproof,          {"proof"} },
 };
 // clang-format on
 
 void RegisterRawTransactionRPCCommands(CRPCTable &t) {
     for (unsigned int vcidx = 0; vcidx < ARRAYLEN(commands); vcidx++) {
         t.appendCommand(commands[vcidx].name, &commands[vcidx]);
     }
 }