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diff --git a/eclass/bitcoincore.eclass b/eclass/bitcoincore.eclass
new file mode 100644
index 0000000..3d39827
--- /dev/null
+++ b/eclass/bitcoincore.eclass
@@ -0,0 +1,431 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: $
+#
+# @ECLASS: bitcoincore.eclass
+# @MAINTAINER:
+# Luke Dashjr <luke_gentoo_bitcoin@dashjr.org>
+# @BLURB: common code for Bitcoin Core ebuilds
+# @DESCRIPTION:
+# This eclass is used in Bitcoin Core ebuilds (bitcoin-qt, bitcoind,
+# libbitcoinconsensus) to provide a single common place for the common ebuild
+# stuff.
+#
+# The eclass provides all common dependencies as well as common use flags.
+
+has "${EAPI:-0}" 5 || die "EAPI=${EAPI} not supported"
+
+if [[ ! ${_BITCOINCORE_ECLASS} ]]; then
+
+in_bcc_iuse() {
+	local liuse=( ${BITCOINCORE_IUSE} )
+	has "${1}" "${liuse[@]#[+-]}"
+}
+
+in_bcc_policy() {
+	local liuse=( ${BITCOINCORE_POLICY_PATCHES} )
+	has "${1}" "${liuse[@]#[+-]}"
+}
+
+DB_VER="4.8"
+inherit autotools db-use eutils
+
+if [ -z "$BITCOINCORE_COMMITHASH" ]; then
+	inherit git-2
+fi
+
+fi
+
+EXPORT_FUNCTIONS src_prepare src_test src_install
+
+if in_bcc_iuse ljr || in_bcc_iuse 1stclassmsg || in_bcc_iuse zeromq || [ -n "$BITCOINCORE_POLICY_PATCHES" ]; then
+	EXPORT_FUNCTIONS pkg_pretend
+fi
+
+if [[ ! ${_BITCOINCORE_ECLASS} ]]; then
+
+# @ECLASS-VARIABLE: BITCOINCORE_COMMITHASH
+# @DESCRIPTION:
+# Set this variable before the inherit line, to the upstream commit hash.
+
+# @ECLASS-VARIABLE: BITCOINCORE_IUSE
+# @DESCRIPTION:
+# Set this variable before the inherit line, to the USE flags supported.
+
+# @ECLASS-VARIABLE: BITCOINCORE_LJR_DATE
+# @DESCRIPTION:
+# Set this variable before the inherit line, to the datestamp of the ljr
+# patchset.
+
+# @ECLASS-VARIABLE: BITCOINCORE_POLICY_PATCHES
+# @DESCRIPTION:
+# Set this variable before the inherit line, to a space-delimited list of
+# supported policies.
+
+MyPV="${PV/_/}"
+MyPN="bitcoin"
+MyP="${MyPN}-${MyPV}"
+
+# These are expected to change in future versions
+DOCS="${DOCS} doc/README.md doc/release-notes.md"
+OPENSSL_DEPEND="dev-libs/openssl:0[-bindist]"
+WALLET_DEPEND="sys-libs/db:$(db_ver_to_slot "${DB_VER}")[cxx]"
+LIBEVENT_DEPEND=""
+UNIVALUE_DEPEND=""
+BITCOINCORE_LJR_NAME=ljr
+[ -n "${BITCOINCORE_LJR_PV}" ] || BITCOINCORE_LJR_PV="${PV}"
+
+case "${PV}" in
+0.10*)
+	BITCOINCORE_MINOR=10
+	LIBSECP256K1_DEPEND="=dev-libs/libsecp256k1-0.0.0_pre20141212"
+	case "${PVR}" in
+	0.10.2)
+		BITCOINCORE_RBF_DIFF="16f45600c8c372a738ffef544292864256382601...a23678edc70204599299459a206709a00e039db7"
+		BITCOINCORE_RBF_PATCHFILE="${MyPN}-rbf-v0.10.2.patch"
+		;;
+	*)
+		BITCOINCORE_RBF_DIFF="16f45600c8c372a738ffef544292864256382601...4890416cde655559eba09d3fd6f79db7d0d6314a"
+		BITCOINCORE_RBF_PATCHFILE="${MyPN}-rbf-v0.10.2-r1.patch"
+		;;
+	esac
+	BITCOINCORE_XT_DIFF="047a89831760ff124740fe9f58411d57ee087078...d4084b62c42c38bfe302d712b98909ab26ecce2f"
+	;;
+0.11*)
+	BITCOINCORE_MINOR=11
+	LIBSECP256K1_DEPEND="=dev-libs/libsecp256k1-0.0.0_pre20150423"
+	# RBF is bundled with ljr patchset since 0.11.1
+	if [ "${PVR}" = "0.11.0" ]; then
+		BITCOINCORE_RBF_DIFF="5f032c75eefb0fe8ff79ed9595da1112c05f5c4a...660b96d24916b8ef4e0677e5d6162e24e2db447e"
+		BITCOINCORE_RBF_PATCHFILE="${MyPN}-rbf-v0.11.0rc3.patch"
+	fi
+	;;
+0.12*)
+	BITCOINCORE_MINOR=12
+	IUSE="${IUSE} libressl"
+	OPENSSL_DEPEND="!libressl? ( dev-libs/openssl:0[-bindist] ) libressl? ( dev-libs/libressl )"
+	if in_bcc_iuse libevent; then
+		LIBEVENT_DEPEND="libevent? ( dev-libs/libevent )"
+	else
+		LIBEVENT_DEPEND="dev-libs/libevent"
+	fi
+	LIBSECP256K1_DEPEND="=dev-libs/libsecp256k1-0.0.0_pre20151118[recovery]"
+	UNIVALUE_DEPEND="dev-libs/univalue"
+	BITCOINCORE_LJR_NAME=knots
+	if in_bcc_policy spamfilter; then
+		REQUIRED_USE="${REQUIRED_USE} bitcoin_policy_spamfilter? ( ljr )"
+	fi
+	;;
+9999*)
+	BITCOINCORE_MINOR=9999
+	BITCOINCORE_SERIES="9999"
+	LIBEVENT_DEPEND="dev-libs/libevent"
+	LIBSECP256K1_DEPEND=">dev-libs/libsecp256k1-0.0.0_pre20150422"
+	UNIVALUE_DEPEND="dev-libs/univalue"
+	;;
+*)
+	die "Unrecognised version"
+	;;
+esac
+
+[ -n "${BITCOINCORE_SERIES}" ] || BITCOINCORE_SERIES="0.${BITCOINCORE_MINOR}.x"
+
+LJR_PV() {
+	local testsfx=
+	if [ -n "${BITCOINCORE_LJR_PREV}" ]; then
+		if [ "$1" = "dir" ]; then
+			testsfx="/test/${BITCOINCORE_LJR_PREV}"
+		else
+			testsfx=".${BITCOINCORE_LJR_PREV}"
+		fi
+	fi
+	echo "${BITCOINCORE_LJR_PV}.${BITCOINCORE_LJR_NAME}${BITCOINCORE_LJR_DATE}${testsfx}"
+}
+LJR_PATCHDIR="${MyPN}-$(LJR_PV ljr).patches"
+LJR_PATCH() { echo "${WORKDIR}/${LJR_PATCHDIR}/${MyPN}-$(LJR_PV ljr).$@.patch"; }
+LJR_PATCH_DESC="http://luke.dashjr.org/programs/${MyPN}/files/${MyPN}d/luke-jr/${BITCOINCORE_SERIES}/$(LJR_PV ljr)/${MyPN}-$(LJR_PV ljr).desc.txt"
+if [ "$BITCOINCORE_MINOR" -ge 12 ]; then
+	LJR_PATCH_DESC="http://bitcoinknots.org/files/${BITCOINCORE_SERIES}/$(LJR_PV dir)/${MyPN}-$(LJR_PV).desc.txt"
+fi
+
+HOMEPAGE="http://bitcoincore.org/"
+
+if [ -z "$BITCOINCORE_COMMITHASH" ]; then
+	EGIT_PROJECT='bitcoin'
+	EGIT_REPO_URI="git://github.com/bitcoin/bitcoin.git https://github.com/bitcoin/bitcoin.git"
+else
+	SRC_URI="https://github.com/${MyPN}/${MyPN}/archive/${BITCOINCORE_COMMITHASH}.tar.gz -> ${MyPN}-v${PV}${BITCOINCORE_SRC_SUFFIX}.tgz"
+	if [ -z "${BITCOINCORE_NO_SYSLIBS}" ]; then
+		SRC_URI="${SRC_URI} http://bitcoinknots.org/files/${BITCOINCORE_SERIES}/$(LJR_PV dir)/${LJR_PATCHDIR}.txz -> ${LJR_PATCHDIR}.tar.xz"
+	fi
+	if in_bcc_iuse addrindex; then
+		SRC_URI="${SRC_URI} addrindex? ( https://github.com/btcdrak/bitcoin/compare/${BITCOINCORE_ADDRINDEX_DIFF}.diff -> ${BITCOINCORE_ADDRINDEX_PATCHFILE} )"
+	fi
+	if in_bcc_iuse xt; then
+		BITCOINXT_PATCHFILE="${MyPN}xt-v${PV}.patch"
+		SRC_URI="${SRC_URI} xt? ( https://github.com/bitcoinxt/bitcoinxt/compare/${BITCOINCORE_XT_DIFF}.diff -> ${BITCOINXT_PATCHFILE} )"
+	fi
+	if in_bcc_policy rbf && [ -n "${BITCOINCORE_RBF_DIFF}" ]; then
+		SRC_URI="${SRC_URI} bitcoin_policy_rbf? ( https://github.com/petertodd/bitcoin/compare/${BITCOINCORE_RBF_DIFF}.diff -> ${BITCOINCORE_RBF_PATCHFILE} )"
+	fi
+	S="${WORKDIR}/${MyPN}-${BITCOINCORE_COMMITHASH}"
+fi
+
+bitcoincore_policy_iuse() {
+	local mypolicy iuse_def new_BITCOINCORE_IUSE=
+	for mypolicy in ${BITCOINCORE_POLICY_PATCHES}; do
+		if [[ "${mypolicy:0:1}" =~ ^[+-] ]]; then
+			iuse_def=${mypolicy:0:1}
+			mypolicy="${mypolicy:1}"
+		else
+			iuse_def=
+		fi
+		new_BITCOINCORE_IUSE="$new_BITCOINCORE_IUSE ${iuse_def}bitcoin_policy_${mypolicy}"
+	done
+	echo $new_BITCOINCORE_IUSE
+}
+IUSE="$IUSE $BITCOINCORE_IUSE $(bitcoincore_policy_iuse)"
+if in_bcc_policy rbf && in_bcc_iuse xt; then
+	REQUIRED_USE="${REQUIRED_USE} bitcoin_policy_rbf? ( !xt )"
+fi
+
+BITCOINCORE_COMMON_DEPEND="
+	${OPENSSL_DEPEND}
+"
+if ! has libevent ${BITCOINCORE_NO_DEPEND}; then
+	BITCOINCORE_COMMON_DEPEND="${BITCOINCORE_COMMON_DEPEND} ${LIBEVENT_DEPEND}"
+fi
+if [ "${BITCOINCORE_NEED_LIBSECP256K1}" = "1" ]; then
+	BITCOINCORE_COMMON_DEPEND="${BITCOINCORE_COMMON_DEPEND} $LIBSECP256K1_DEPEND"
+fi
+if [ "${PN}" != "libbitcoinconsensus" ] && ! use_if_iuse test; then
+	BITCOINCORE_COMMON_DEPEND="${BITCOINCORE_COMMON_DEPEND}
+		${UNIVALUE_DEPEND}
+		>=dev-libs/boost-1.52.0[threads(+)]
+	"
+fi
+bitcoincore_common_depend_use() {
+	in_bcc_iuse "$1" || return
+	BITCOINCORE_COMMON_DEPEND="${BITCOINCORE_COMMON_DEPEND} $1? ( $2 )"
+}
+bitcoincore_common_depend_use upnp '>net-libs/miniupnpc-1.9.20150915'
+bitcoincore_common_depend_use wallet "${WALLET_DEPEND}"
+bitcoincore_common_depend_use zeromq net-libs/zeromq
+RDEPEND="${RDEPEND} ${BITCOINCORE_COMMON_DEPEND}"
+DEPEND="${DEPEND} ${BITCOINCORE_COMMON_DEPEND}
+	>=app-shells/bash-4.1
+	sys-apps/sed
+"
+if [ "${BITCOINCORE_NEED_LEVELDB}" = "1" ]; then
+	RDEPEND="${RDEPEND} virtual/bitcoin-leveldb"
+fi
+if in_bcc_iuse ljr; then
+	if [ "$BITCOINCORE_SERIES" = "0.10.x" ]; then
+		DEPEND="${DEPEND} ljr? ( dev-vcs/git )"
+	elif [ "${BITCOINCORE_LJR_NAME}" = "knots" ]; then
+		DEPEND="${DEPEND} ljr? ( dev-lang/perl )"
+	fi
+fi
+
+bitcoincore_policymsg() {
+	local USEFlag="bitcoin_policy_$1"
+	in_iuse "${USEFlag}" || return
+	if use "${USEFlag}"; then
+		[ -n "$2" ] && einfo "$2"
+	else
+		[ -n "$3" ] && einfo "$3"
+	fi
+	bitcoincore_policymsg_flag=true
+}
+
+bitcoincore_pkg_pretend() {
+	bitcoincore_policymsg_flag=false
+	if use_if_iuse ljr || use_if_iuse 1stclassmsg || use_if_iuse addrindex || use_if_iuse xt || { use_if_iuse zeromq && [ "${BITCOINCORE_MINOR}" -lt 12 ]; }; then
+		einfo "Extra functionality improvements to Bitcoin Core are enabled."
+		bitcoincore_policymsg_flag=true
+		if use_if_iuse addrindex addrindex; then
+			einfo "Please be aware that the addrindex functionality is known to be unreliable."
+		fi
+	fi
+	bitcoincore_policymsg cltv \
+		"CLTV policy is enabled: Your node will recognise and assist OP_CHECKLOCKTIMEVERIFY (BIP65) transactions." \
+		"CLTV policy is disabled: Your node will not recognise OP_CHECKLOCKTIMEVERIFY (BIP65) transactions."
+	bitcoincore_policymsg cpfp \
+		"CPFP policy is enabled: If you mine, you will give consideration to child transaction fees to pay for their parents." \
+		"CPFP policy is disabled: If you mine, you will ignore transactions unless they have sufficient fee themselves, even if child transactions offer a fee to cover their cost."
+	bitcoincore_policymsg dcmp \
+		"Data Carrier Multi-Push policy is enabled: Your node will assist transactions with at most a single multiple-'push' data carrier output." \
+		"Data Carrier Multi-Push policy is disabled: Your node will assist transactions with at most a single data carrier output with only a single 'push'."
+	bitcoincore_policymsg rbf \
+		"Replace By Fee policy is enabled: Your node will preferentially mine and relay transactions paying the highest fee, regardless of receive order." \
+		"Replace By Fee policy is disabled: Your node will only accept the first transaction seen consuming a conflicting input, regardless of fee offered by later ones."
+	bitcoincore_policymsg spamfilter \
+		"Enhanced spam filter policy is enabled: Your node will identify notorious spam scripts and avoid assisting them. This may impact your ability to use some services (see link for a list)." \
+		"Enhanced spam filter policy is disabled: Your node will not be checking for notorious spam scripts, and may assist them."
+	$bitcoincore_policymsg_flag && einfo "For more information on any of the above, see ${LJR_PATCH_DESC}"
+}
+
+bitcoincore_git_apply() {
+	local patchfile="$1"
+	einfo "Applying ${patchfile##*/} ..."
+	git apply --whitespace=nowarn "${patchfile}" || die
+}
+
+bitcoincore_predelete_patch() {
+	local patchfile="$1"
+	mkdir -p "${WORKDIR}/pdp"
+	local tmpfile="${WORKDIR}/pdp/${patchfile##*/}"
+	perl -ne '
+		newline:
+		if (m[(^diff .* b/(.*)$)]) {
+			$a = "$1\n";
+			$f = $2;
+			$_ = <>;
+			if (m[^deleted file]) {
+				unlink($f) || die;
+				while (!m[^diff ]) {
+					$_ = <>
+				}
+				goto newline
+			} else {
+				print($a)
+			}
+		}
+		print
+	' <"${patchfile}" >"${tmpfile}" || die
+	epatch "${tmpfile}"
+}
+
+bitcoincore_prepare() {
+	local mypolicy
+	if [ -n "${BITCOINCORE_NO_SYSLIBS}" ]; then
+		true
+	elif [ "${PV}" = "9999" ]; then
+		epatch "${FILESDIR}/${PV}-syslibs.patch"
+	else
+		epatch "$(LJR_PATCH syslibs)"
+	fi
+	if use_if_iuse ljr; then
+		if [ "${BITCOINCORE_LJR_NAME}" = "knots" ]; then
+			epatch "$(LJR_PATCH f)"
+			bitcoincore_predelete_patch "$(LJR_PATCH branding)"
+			epatch "$(LJR_PATCH ts)"
+		elif [ "${BITCOINCORE_SERIES}" = "0.10.x" ]; then
+			# Regular epatch won't work with binary files
+			bitcoincore_git_apply "$(LJR_PATCH ljrF)"
+		else
+			epatch "$(LJR_PATCH ljrF)"
+		fi
+	fi
+	if use_if_iuse 1stclassmsg; then
+		epatch "$(LJR_PATCH 1stclassmsg)"
+	fi
+	if use_if_iuse addrindex; then
+		epatch "${DISTDIR}/${BITCOINCORE_ADDRINDEX_PATCHFILE}"
+	fi
+	if use_if_iuse xt; then
+		epatch "${DISTDIR}/${BITCOINXT_PATCHFILE}"
+	fi
+	{ use_if_iuse zeromq && [ "${BITCOINCORE_MINOR}" -lt 12 ]; } && epatch "$(LJR_PATCH zeromq)"
+	for mypolicy in ${BITCOINCORE_POLICY_PATCHES}; do
+		mypolicy="${mypolicy#[-+]}"
+
+		if [ "${BITCOINCORE_MINOR}" -ge 12 ]; then
+			case "${mypolicy}" in
+			rbf)
+				use bitcoin_policy_rbf || sed -i 's/\(DEFAULT_ENABLE_REPLACEMENT = \)true/\1false/' src/main.h
+				;;
+			spamfilter)
+				use bitcoin_policy_spamfilter || sed -i 's/\(DEFAULT_SPAMFILTER = \)true/\1false/' src/main.h
+				;;
+			*)
+				die "Unknown policy ${mypolicy}"
+			esac
+			continue
+		fi
+
+		use bitcoin_policy_${mypolicy} || continue
+		case "${mypolicy}" in
+		rbf)
+			if [ -n "${BITCOINCORE_RBF_PATCHFILE}" ]; then
+				epatch "${DISTDIR}/${BITCOINCORE_RBF_PATCHFILE}"
+			else
+				epatch "$(LJR_PATCH ${mypolicy})"
+			fi
+			;;
+		*)
+			epatch "$(LJR_PATCH ${mypolicy})"
+			;;
+		esac
+	done
+}
+
+bitcoincore_autoreconf() {
+	eautoreconf
+	rm -r src/leveldb || die
+	rm -r src/secp256k1 || die
+}
+
+bitcoincore_src_prepare() {
+	 bitcoincore_prepare
+	 bitcoincore_autoreconf
+}
+
+bitcoincore_conf() {
+	local my_econf=
+	if use_if_iuse upnp; then
+		my_econf="${my_econf} --with-miniupnpc --enable-upnp-default"
+	else
+		my_econf="${my_econf} --without-miniupnpc --disable-upnp-default"
+	fi
+	if use_if_iuse test; then
+		my_econf="${my_econf} --enable-tests"
+	else
+		my_econf="${my_econf} --disable-tests"
+	fi
+	if use_if_iuse wallet; then
+		my_econf="${my_econf} --enable-wallet"
+	else
+		my_econf="${my_econf} --disable-wallet"
+	fi
+	if ! use_if_iuse zeromq; then
+		# NOTE: Older (pre-0.12) patches would disable ZMQ if --enable-zmq was passed
+		my_econf="${my_econf} --disable-zmq"
+	fi
+	if [ -z "${BITCOINCORE_NO_SYSLIBS}" ]; then
+		my_econf="${my_econf} --disable-util-cli --disable-util-tx"
+	else
+		my_econf="${my_econf} --without-utils"
+	fi
+	# Knots 0.12.0 errors if --with-libevent used for bitcoin{d,-cli}, so only disable it when not wanted
+	if has libevent ${BITCOINCORE_NO_DEPEND} || { in_bcc_iuse libevent && ! use libevent; }; then
+		my_econf="${my_econf} --without-libevent"
+	fi
+	if [ "${BITCOINCORE_NEED_LEVELDB}" = "1" ]; then
+		# Passing --with-system-leveldb fails if leveldb is not installed, so only use it for targets that use LevelDB
+		my_econf="${my_econf} --with-system-leveldb"
+	fi
+	econf \
+		--disable-bench  \
+		--disable-ccache \
+		--disable-static \
+		--with-system-libsecp256k1  \
+		--with-system-univalue  \
+		--without-libs    \
+		--without-daemon  \
+		--without-gui     \
+		${my_econf}  \
+		"$@"
+}
+
+bitcoincore_src_test() {
+	emake check
+}
+
+bitcoincore_src_install() {
+	default
+	[ "${PN}" = "libbitcoinconsensus" ] || rm "${D}/usr/bin/test_bitcoin"
+}
+
+_BITCOINCORE_ECLASS=1
+fi