diff --git a/app/CMakeLists.txt b/app/CMakeLists.txt
index 80e07f7..b0a67ef 100644
--- a/app/CMakeLists.txt
+++ b/app/CMakeLists.txt
@@ -68,108 +68,108 @@ set_target_properties(boost_wserialization PROPERTIES IMPORTED_LOCATION
     ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/libboost_wserialization.a)
 
 #############
-# Monero
+# Wownero
 #############
 
 add_library(wallet_api STATIC IMPORTED)
 set_target_properties(wallet_api PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libwallet_api.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libwallet_api.a)
 
 add_library(wallet STATIC IMPORTED)
 set_target_properties(wallet PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libwallet.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libwallet.a)
 
 add_library(cryptonote_core STATIC IMPORTED)
 set_target_properties(cryptonote_core PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libcryptonote_core.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libcryptonote_core.a)
 
 add_library(cryptonote_basic STATIC IMPORTED)
 set_target_properties(cryptonote_basic PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libcryptonote_basic.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libcryptonote_basic.a)
 
 add_library(mnemonics STATIC IMPORTED)
 set_target_properties(mnemonics PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libmnemonics.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libmnemonics.a)
 
 add_library(common STATIC IMPORTED)
 set_target_properties(common PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libcommon.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libcommon.a)
 
 add_library(cncrypto STATIC IMPORTED)
 set_target_properties(cncrypto PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libcncrypto.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libcncrypto.a)
 
 add_library(ringct STATIC IMPORTED)
 set_target_properties(ringct PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libringct.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libringct.a)
 
 add_library(ringct_basic STATIC IMPORTED)
 set_target_properties(ringct_basic PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libringct_basic.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libringct_basic.a)
 
 add_library(blockchain_db STATIC IMPORTED)
 set_target_properties(blockchain_db PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libblockchain_db.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libblockchain_db.a)
 
 add_library(lmdb STATIC IMPORTED)
 set_target_properties(lmdb PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/liblmdb.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/liblmdb.a)
 
 add_library(easylogging STATIC IMPORTED)
 set_target_properties(easylogging PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libeasylogging.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libeasylogging.a)
 
 add_library(unbound STATIC IMPORTED)
 set_target_properties(unbound PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libunbound.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libunbound.a)
 
 add_library(epee STATIC IMPORTED)
 set_target_properties(epee PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libepee.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libepee.a)
 
 add_library(blocks STATIC IMPORTED)
 set_target_properties(blocks PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libblocks.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libblocks.a)
 
 add_library(checkpoints STATIC IMPORTED)
 set_target_properties(checkpoints PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libcheckpoints.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libcheckpoints.a)
 
 add_library(device STATIC IMPORTED)
 set_target_properties(device PROPERTIES IMPORTED_LOCATION
-        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libdevice.a)
+        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libdevice.a)
 
 add_library(device_trezor STATIC IMPORTED)
 set_target_properties(device_trezor PROPERTIES IMPORTED_LOCATION
-        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libdevice_trezor.a)
+        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libdevice_trezor.a)
 
 add_library(multisig STATIC IMPORTED)
 set_target_properties(multisig PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libmultisig.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libmultisig.a)
 
 add_library(version STATIC IMPORTED)
 set_target_properties(version PROPERTIES IMPORTED_LOCATION
-    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libversion.a)
+    ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libversion.a)
 
 add_library(net STATIC IMPORTED)
 set_target_properties(net PROPERTIES IMPORTED_LOCATION
-        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libnet.a)
+        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libnet.a)
 
 add_library(hardforks STATIC IMPORTED)
 set_target_properties(hardforks PROPERTIES IMPORTED_LOCATION
-        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libhardforks.a)
+        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libhardforks.a)
 
 add_library(randomx STATIC IMPORTED)
 set_target_properties(randomx PROPERTIES IMPORTED_LOCATION
-        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/librandomx.a)
+        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/librandomx.a)
 
 add_library(rpc_base STATIC IMPORTED)
 set_target_properties(rpc_base PROPERTIES IMPORTED_LOCATION
-        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/librpc_base.a)
+        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/librpc_base.a)
 
 add_library(wallet-crypto STATIC IMPORTED)
 set_target_properties(wallet-crypto PROPERTIES IMPORTED_LOCATION
-        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/monero/libwallet-crypto.a)
+        ${EXTERNAL_LIBS_DIR}/${ANDROID_ABI}/wownero/libwallet-crypto.a)
 
 #############
 # System
diff --git a/app/build.gradle b/app/build.gradle
index 33ef933..93ee8ca 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -3,6 +3,7 @@ apply plugin: 'com.android.application'
 android {
     compileSdkVersion 30
     buildToolsVersion '29.0.3'
+    ndkVersion '17.2.4988734'
     defaultConfig {
         applicationId "com.m2049r.wowwallet"
         minSdkVersion 21
diff --git a/external-libs/.gitignore b/external-libs/.gitignore
index 4cc6b6d..2dbd21a 100644
--- a/external-libs/.gitignore
+++ b/external-libs/.gitignore
@@ -1,4 +1,4 @@
-/monero
+/wownero
 /arm64-v8a
 /armeabi-v7a
 /x86
diff --git a/external-libs/Makefile b/external-libs/Makefile
index 62f6af2..67f29d0 100644
--- a/external-libs/Makefile
+++ b/external-libs/Makefile
@@ -1,45 +1,45 @@
-# ln -s /opt/monero monero
+FLAVOUR=wownero
 
 all: arm64-v8a x86_64 include VERSION
 
-arm64-v8a: monero
+arm64-v8a: $(FLAVOUR)
 	-rm -rf arm64-v8a
-	-docker container rm monero-android-arm64 -f
-	docker build -f android64.Dockerfile -t monero-android-arm64 monero
-	docker create -it --name monero-android-arm64 monero-android-arm64 bash
-	docker cp monero-android-arm64:/opt/android/prefix/lib/. arm64-v8a/
-	docker cp monero-android-arm64:/src/build/release/lib/. arm64-v8a//monero
+	-docker container rm $(FLAVOUR)-android-arm64 -f
+	docker build -f android64.Dockerfile -t $(FLAVOUR)-android-arm64 $(FLAVOUR)
+	docker create -it --name $(FLAVOUR)-android-arm64 $(FLAVOUR)-android-arm64 bash
+	docker cp $(FLAVOUR)-android-arm64:/opt/android/prefix/lib/. arm64-v8a/
+	docker cp $(FLAVOUR)-android-arm64:/src/build/release/lib/. arm64-v8a//$(FLAVOUR)
 
-armeabi-v7a: monero
+armeabi-v7a: $(FLAVOUR)
 	-rm -rf armeabi-v7a
-	-docker container rm monero-android-arm32 -f
-	docker build -f android32.Dockerfile -t monero-android-arm32 monero
-	docker create -it --name monero-android-arm32 monero-android-arm32 bash
-	docker cp monero-android-arm32:/opt/android/prefix/lib/. armeabi-v7a
-	docker cp monero-android-arm32:/src/build/release/lib/. armeabi-v7a/monero
+	-docker container rm $(FLAVOUR)-android-arm32 -f
+	docker build -f android32.Dockerfile -t $(FLAVOUR)-android-arm32 $(FLAVOUR)
+	docker create -it --name $(FLAVOUR)-android-arm32 $(FLAVOUR)-android-arm32 bash
+	docker cp $(FLAVOUR)-android-arm32:/opt/android/prefix/lib/. armeabi-v7a
+	docker cp $(FLAVOUR)-android-arm32:/src/build/release/lib/. armeabi-v7a/$(FLAVOUR)
 
-x86_64: monero
+x86_64: $(FLAVOUR)
 	-rm -rf x86_64
-	-docker container rm monero-android-x86_64 -f
-	docker build -f android64_x86.Dockerfile -t monero-android-x86_64 monero
-	docker create -it --name monero-android-x86_64 monero-android-x86_64 bash
-	docker cp monero-android-x86_64:/opt/android/prefix/lib/. x86_64
-	docker cp monero-android-x86_64:/src/build/release/lib/. x86_64/monero
+	-docker container rm $(FLAVOUR)-android-x86_64 -f
+	docker build -f android64_x86.Dockerfile -t $(FLAVOUR)-android-x86_64 $(FLAVOUR)
+	docker create -it --name $(FLAVOUR)-android-x86_64 $(FLAVOUR)-android-x86_64 bash
+	docker cp $(FLAVOUR)-android-x86_64:/opt/android/prefix/lib/. x86_64
+	docker cp $(FLAVOUR)-android-x86_64:/src/build/release/lib/. x86_64/$(FLAVOUR)
 
-x86: monero
+x86: $(FLAVOUR)
 	-rm -rf x86
-	-docker container rm monero-android-x86 -f
-	docker build -f android32_x86.Dockerfile -t monero-android-x86 monero
-	docker create -it --name monero-android-x86 monero-android-x86 bash
-	docker cp monero-android-x86:/opt/android/prefix/lib/. x86
-	docker cp monero-android-x86:/src/build/release/lib/. x86/monero
+	-docker container rm $(FLAVOUR)-android-x86 -f
+	docker build -f android32_x86.Dockerfile -t $(FLAVOUR)-android-x86 $(FLAVOUR)
+	docker create -it --name $(FLAVOUR)-android-x86 $(FLAVOUR)-android-x86 bash
+	docker cp $(FLAVOUR)-android-x86:/opt/android/prefix/lib/. x86
+	docker cp $(FLAVOUR)-android-x86:/src/build/release/lib/. x86/$(FLAVOUR)
 
-include: monero
+include: $(FLAVOUR)
 	-mkdir include
-	cp monero/src/wallet/api/wallet2_api.h include/
+	cp $(FLAVOUR)/src/wallet/api/wallet2_api.h include/
 
 VERSION:
-	echo MONERUJO_WOW `git -C . branch | grep "^\*" | sed 's/^..//'` with WOWMONERO `git -C monero branch | grep "^\*" | sed 's/^..//'` > VERSION
+	echo MONERUJO_WOW `git -C . branch | grep "^\*" | sed 's/^..//'` with $(FLAVOUR) `git -C $(FLAVOUR) branch | grep "^\*" | sed 's/^..//'` > VERSION
 
 clean:
 	-rm -rf arm64-v8a
@@ -50,17 +50,17 @@ clean:
 	-rm -f VERSION
 
 distclean: clean
-	-docker container rm monero-android-arm64 -f
-	-docker container rm monero-android-arm32 -f
-	-docker container rm monero-android-x86_64 -f
-	-docker container rm monero-android-x86 -f
-	-docker image rm monero-android-arm64 -f
-	-docker image rm monero-android-arm32 -f
-	-docker image rm monero-android-x86_64 -f
-	-docker image rm monero-android-x86 -f
-	-rm monero
+	-docker container rm $(FLAVOUR)-android-arm64 -f
+	-docker container rm $(FLAVOUR)-android-arm32 -f
+	-docker container rm $(FLAVOUR)-android-x86_64 -f
+	-docker container rm $(FLAVOUR)-android-x86 -f
+	-docker image rm $(FLAVOUR)-android-arm64 -f
+	-docker image rm $(FLAVOUR)-android-arm32 -f
+	-docker image rm $(FLAVOUR)-android-x86_64 -f
+	-docker image rm $(FLAVOUR)-android-x86 -f
+	-rm $(FLAVOUR)
 
-monero:
-	$(error Please ln -s monero)
+$(FLAVOUR):
+	$(error Please ln -s $(FLAVOUR))
 
-.PHONY: all clean distclean include
+.PHONY: all clean distclean
diff --git a/external-libs/VERSION b/external-libs/VERSION
index 10dba95..af9d8e2 100644
--- a/external-libs/VERSION
+++ b/external-libs/VERSION
@@ -1 +1 @@
-MONERUJO_WOW master with WOWMONERO (HEAD detached at v0.9.3.3)
+MONERUJO_WOW feature_updatebuild with wownero (HEAD detached at v0.9.3.3)
diff --git a/external-libs/android32.Dockerfile b/external-libs/android32.Dockerfile
index c0c9c33..908e96f 100644
--- a/external-libs/android32.Dockerfile
+++ b/external-libs/android32.Dockerfile
@@ -1,20 +1,22 @@
 FROM debian:stable
 
-RUN apt-get update && apt-get install -y unzip automake build-essential curl file pkg-config git python libtool libtinfo5
+RUN set -x && apt-get update && apt-get install -y unzip automake build-essential curl file pkg-config git python libtool libtinfo5
 
 WORKDIR /opt/android
 ## INSTALL ANDROID SDK
 ENV ANDROID_SDK_REVISION 4333796
 ENV ANDROID_SDK_HASH 92ffee5a1d98d856634e8b71132e8a95d96c83a63fde1099be3d86df3106def9
-RUN curl -s -O https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_REVISION}.zip \
+RUN set -x \
+    && curl -s -O https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_REVISION}.zip \
     && echo "${ANDROID_SDK_HASH}  sdk-tools-linux-${ANDROID_SDK_REVISION}.zip" | sha256sum -c \
     && unzip sdk-tools-linux-${ANDROID_SDK_REVISION}.zip \
     && rm -f sdk-tools-linux-${ANDROID_SDK_REVISION}.zip
 
 ## INSTALL ANDROID NDK
-ENV ANDROID_NDK_REVISION 17b
-ENV ANDROID_NDK_HASH 5dfbbdc2d3ba859fed90d0e978af87c71a91a5be1f6e1c40ba697503d48ccecd
-RUN curl -s -O https://dl.google.com/android/repository/android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip \
+ENV ANDROID_NDK_REVISION 17c
+ENV ANDROID_NDK_HASH 3f541adbd0330a9205ba12697f6d04ec90752c53d6b622101a2a8a856e816589
+RUN set -x \
+    && curl -s -O https://dl.google.com/android/repository/android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip \
     && echo "${ANDROID_NDK_HASH}  android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip" | sha256sum -c \
     && unzip android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip \
     && rm -f android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip
@@ -25,25 +27,29 @@ ENV ANDROID_NDK_ROOT ${WORKDIR}/android-ndk-r${ANDROID_NDK_REVISION}
 ENV PREFIX /opt/android/prefix
 
 ENV TOOLCHAIN_DIR ${WORKDIR}/toolchain-arm
-RUN ${ANDROID_NDK_ROOT}/build/tools/make_standalone_toolchain.py \
+RUN set -x \
+    && ${ANDROID_NDK_ROOT}/build/tools/make_standalone_toolchain.py \
          --arch arm \
          --api 21 \
          --install-dir ${TOOLCHAIN_DIR} \
          --stl=libc++
 
 #INSTALL cmake
-ENV CMAKE_VERSION 3.12.1
-RUN cd /usr \
-    && curl -s -O https://cmake.org/files/v3.12/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
+ARG CMAKE_VERSION=3.14.6
+ARG CMAKE_HASH=82e08e50ba921035efa82b859c74c5fbe27d3e49a4003020e3c77618a4e912cd
+RUN set -x \
+    && cd /usr \
+    && curl -L -s -O https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
+    && echo "${CMAKE_HASH}  cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz" | sha256sum -c \
     && tar -xzf /usr/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
     && rm -f /usr/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz
 ENV PATH /usr/cmake-${CMAKE_VERSION}-Linux-x86_64/bin:$PATH
 
 ## Boost
-ARG BOOST_VERSION=1_68_0
-ARG BOOST_VERSION_DOT=1.68.0
-ARG BOOST_HASH=7f6130bc3cf65f56a618888ce9d5ea704fa10b462be126ad053e80e553d6d8b7
-RUN set -ex \
+ARG BOOST_VERSION=1_70_0
+ARG BOOST_VERSION_DOT=1.70.0
+ARG BOOST_HASH=430ae8354789de4fd19ee52f3b1f739e1fba576f0aded0897c3c2bc00fb38778
+RUN set -x \
     && curl -s -L -o  boost_${BOOST_VERSION}.tar.bz2 https://dl.bintray.com/boostorg/release/${BOOST_VERSION_DOT}/source/boost_${BOOST_VERSION}.tar.bz2 \
     && echo "${BOOST_HASH}  boost_${BOOST_VERSION}.tar.bz2" | sha256sum -c \
     && tar -xvf boost_${BOOST_VERSION}.tar.bz2 \
@@ -57,9 +63,10 @@ ENV PATH $TOOLCHAIN_DIR/arm-linux-androideabi/bin:$TOOLCHAIN_DIR/bin:$PATH
 ARG NPROC=1
 
 # Build iconv for lib boost locale
-ENV ICONV_VERSION 1.15
-ENV ICONV_HASH  ccf536620a45458d26ba83887a983b96827001e92a13847b45e4925cc8913178
-RUN curl -s -O http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${ICONV_VERSION}.tar.gz \
+ENV ICONV_VERSION 1.16
+ENV ICONV_HASH e6a1b1b589654277ee790cce3734f07876ac4ccfaecbee8afa0b649cf529cc04
+RUN set -x \
+    && curl -s -O http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${ICONV_VERSION}.tar.gz \
     && echo "${ICONV_HASH}  libiconv-${ICONV_VERSION}.tar.gz" | sha256sum -c \
     && tar -xzf libiconv-${ICONV_VERSION}.tar.gz \
     && rm -f libiconv-${ICONV_VERSION}.tar.gz \
@@ -68,7 +75,8 @@ RUN curl -s -O http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${ICONV_VERSION}.tar
     && make -j${NPROC} && make install
 
 ## Build BOOST
-RUN cd boost_${BOOST_VERSION} \
+RUN set -x \
+    && cd boost_${BOOST_VERSION} \
     && ./b2 --build-type=minimal link=static runtime-link=static --with-chrono --with-date_time --with-filesystem --with-program_options --with-regex --with-serialization --with-system --with-thread --with-locale --build-dir=android --stagedir=android toolset=clang threading=multi threadapi=pthread target-os=android -sICONV_PATH=${PREFIX} install -j${NPROC}
 
 #Note : we build openssl because the default lacks DSA1
@@ -76,7 +84,8 @@ RUN cd boost_${BOOST_VERSION} \
 # download, configure and make Zlib
 ENV ZLIB_VERSION 1.2.11
 ENV ZLIB_HASH c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1
-RUN curl -s -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz \
+RUN set -x \
+    && curl -s -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz \
     && echo "${ZLIB_HASH}  zlib-${ZLIB_VERSION}.tar.gz" | sha256sum -c \
     && tar -xzf zlib-${ZLIB_VERSION}.tar.gz \
     && rm zlib-${ZLIB_VERSION}.tar.gz \
@@ -87,7 +96,8 @@ RUN curl -s -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz \
 # open ssl
 ARG OPENSSL_VERSION=1.0.2p
 ARG OPENSSL_HASH=50a98e07b1a89eb8f6a99477f262df71c6fa7bef77df4dc83025a2845c827d00
-RUN curl -s -O https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz \
+RUN set -x \
+    && curl -s -O https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz \
     && echo "${OPENSSL_HASH}  openssl-${OPENSSL_VERSION}.tar.gz" | sha256sum -c \
     && tar -xzf openssl-${OPENSSL_VERSION}.tar.gz \
     && rm openssl-${OPENSSL_VERSION}.tar.gz \
@@ -103,9 +113,10 @@ RUN curl -s -O https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz
     && make install
 
 # ZMQ
-ARG ZMQ_VERSION=v4.2.5
-ARG ZMQ_HASH=d062edd8c142384792955796329baf1e5a3377cd
-RUN git clone https://github.com/zeromq/libzmq.git -b ${ZMQ_VERSION} \
+ARG ZMQ_VERSION=v4.3.2
+ARG ZMQ_HASH=a84ffa12b2eb3569ced199660bac5ad128bff1f0
+RUN set -x \
+    && git clone https://github.com/zeromq/libzmq.git -b ${ZMQ_VERSION} \
     && cd libzmq \
     && test `git rev-parse HEAD` = ${ZMQ_HASH} || exit 1 \
     && ./autogen.sh \
@@ -114,9 +125,9 @@ RUN git clone https://github.com/zeromq/libzmq.git -b ${ZMQ_VERSION} \
     && make install
 
 # Sodium
-ARG SODIUM_VERSION=1.0.16
-ARG SODIUM_HASH=675149b9b8b66ff44152553fb3ebf9858128363d
-RUN set -ex \
+ARG SODIUM_VERSION=1.0.18
+ARG SODIUM_HASH=4f5e89fa84ce1d178a6765b8b46f2b6f91216677
+RUN set -x \
     && git clone https://github.com/jedisct1/libsodium.git -b ${SODIUM_VERSION} \
     && cd libsodium \
     && test `git rev-parse HEAD` = ${SODIUM_HASH} || exit 1 \
@@ -127,7 +138,7 @@ RUN set -ex \
 
 COPY . /src
 ARG NPROC=4
-RUN set -ex \
+RUN set -x \
     && cd /src \
     && CMAKE_INCLUDE_PATH="${PREFIX}/include" \
        CMAKE_LIBRARY_PATH="${PREFIX}/lib" \
@@ -135,6 +146,6 @@ RUN set -ex \
        USE_SINGLE_BUILDDIR=1 \
        PATH=${HOST_PATH} make release-static-android-armv7-wallet_api -j${NPROC}
 
-RUN set -ex \
+RUN set -x \
     && cd /src/build/release \
     && find . -path ./lib -prune -o -name '*.a' -exec cp '{}' lib \;
diff --git a/external-libs/android32_x86.Dockerfile b/external-libs/android32_x86.Dockerfile
index 3cded27..7ba7bcf 100644
--- a/external-libs/android32_x86.Dockerfile
+++ b/external-libs/android32_x86.Dockerfile
@@ -1,20 +1,22 @@
 FROM debian:stable
 
-RUN apt-get update && apt-get install -y unzip automake build-essential curl file pkg-config git python libtool libtinfo5
+RUN set -x && apt-get update && apt-get install -y unzip automake build-essential curl file pkg-config git python libtool libtinfo5
 
 WORKDIR /opt/android
 ## INSTALL ANDROID SDK
 ENV ANDROID_SDK_REVISION 4333796
 ENV ANDROID_SDK_HASH 92ffee5a1d98d856634e8b71132e8a95d96c83a63fde1099be3d86df3106def9
-RUN curl -s -O https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_REVISION}.zip \
+RUN set -x \
+    && curl -s -O https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_REVISION}.zip \
     && echo "${ANDROID_SDK_HASH}  sdk-tools-linux-${ANDROID_SDK_REVISION}.zip" | sha256sum -c \
     && unzip sdk-tools-linux-${ANDROID_SDK_REVISION}.zip \
     && rm -f sdk-tools-linux-${ANDROID_SDK_REVISION}.zip
 
 ## INSTALL ANDROID NDK
-ENV ANDROID_NDK_REVISION 17b
-ENV ANDROID_NDK_HASH 5dfbbdc2d3ba859fed90d0e978af87c71a91a5be1f6e1c40ba697503d48ccecd
-RUN curl -s -O https://dl.google.com/android/repository/android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip \
+ENV ANDROID_NDK_REVISION 17c
+ENV ANDROID_NDK_HASH 3f541adbd0330a9205ba12697f6d04ec90752c53d6b622101a2a8a856e816589
+RUN set -x \
+    && curl -s -O https://dl.google.com/android/repository/android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip \
     && echo "${ANDROID_NDK_HASH}  android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip" | sha256sum -c \
     && unzip android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip \
     && rm -f android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip
@@ -25,25 +27,29 @@ ENV ANDROID_NDK_ROOT ${WORKDIR}/android-ndk-r${ANDROID_NDK_REVISION}
 ENV PREFIX /opt/android/prefix
 
 ENV TOOLCHAIN_DIR ${WORKDIR}/toolchain
-RUN ${ANDROID_NDK_ROOT}/build/tools/make_standalone_toolchain.py \
+RUN set -x \
+    && ${ANDROID_NDK_ROOT}/build/tools/make_standalone_toolchain.py \
          --arch x86 \
          --api 21 \
          --install-dir ${TOOLCHAIN_DIR} \
          --stl=libc++
 
 #INSTALL cmake
-ENV CMAKE_VERSION 3.12.1
-RUN cd /usr \
-    && curl -s -O https://cmake.org/files/v3.12/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
+ARG CMAKE_VERSION=3.14.6
+ARG CMAKE_HASH=82e08e50ba921035efa82b859c74c5fbe27d3e49a4003020e3c77618a4e912cd
+RUN set -x \
+    && cd /usr \
+    && curl -L -s -O https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
+    && echo "${CMAKE_HASH}  cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz" | sha256sum -c \
     && tar -xzf /usr/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
     && rm -f /usr/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz
 ENV PATH /usr/cmake-${CMAKE_VERSION}-Linux-x86_64/bin:$PATH
 
 ## Boost
-ARG BOOST_VERSION=1_68_0
-ARG BOOST_VERSION_DOT=1.68.0
-ARG BOOST_HASH=7f6130bc3cf65f56a618888ce9d5ea704fa10b462be126ad053e80e553d6d8b7
-RUN set -ex \
+ARG BOOST_VERSION=1_70_0
+ARG BOOST_VERSION_DOT=1.70.0
+ARG BOOST_HASH=430ae8354789de4fd19ee52f3b1f739e1fba576f0aded0897c3c2bc00fb38778
+RUN set -x \
     && curl -s -L -o  boost_${BOOST_VERSION}.tar.bz2 https://dl.bintray.com/boostorg/release/${BOOST_VERSION_DOT}/source/boost_${BOOST_VERSION}.tar.bz2 \
     && echo "${BOOST_HASH}  boost_${BOOST_VERSION}.tar.bz2" | sha256sum -c \
     && tar -xvf boost_${BOOST_VERSION}.tar.bz2 \
@@ -57,9 +63,10 @@ ENV PATH $TOOLCHAIN_DIR/i686-linux-android/bin:$TOOLCHAIN_DIR/bin:$PATH
 ARG NPROC=1
 
 # Build iconv for lib boost locale
-ENV ICONV_VERSION 1.15
-ENV ICONV_HASH  ccf536620a45458d26ba83887a983b96827001e92a13847b45e4925cc8913178
-RUN curl -s -O http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${ICONV_VERSION}.tar.gz \
+ENV ICONV_VERSION 1.16
+ENV ICONV_HASH e6a1b1b589654277ee790cce3734f07876ac4ccfaecbee8afa0b649cf529cc04
+RUN set -x \
+    && curl -s -O http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${ICONV_VERSION}.tar.gz \
     && echo "${ICONV_HASH}  libiconv-${ICONV_VERSION}.tar.gz" | sha256sum -c \
     && tar -xzf libiconv-${ICONV_VERSION}.tar.gz \
     && rm -f libiconv-${ICONV_VERSION}.tar.gz \
@@ -68,7 +75,8 @@ RUN curl -s -O http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${ICONV_VERSION}.tar
     && make -j${NPROC} && make install
 
 ## Build BOOST
-RUN cd boost_${BOOST_VERSION} \
+RUN set -x \
+    && cd boost_${BOOST_VERSION} \
     && ./b2 --build-type=minimal link=static runtime-link=static --with-chrono --with-date_time --with-filesystem --with-program_options --with-regex --with-serialization --with-system --with-thread --with-locale --build-dir=android --stagedir=android toolset=clang threading=multi threadapi=pthread target-os=android -sICONV_PATH=${PREFIX} install -j${NPROC}
 
 #Note : we build openssl because the default lacks DSA1
@@ -76,7 +84,8 @@ RUN cd boost_${BOOST_VERSION} \
 # download, configure and make Zlib
 ENV ZLIB_VERSION 1.2.11
 ENV ZLIB_HASH c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1
-RUN curl -s -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz \
+RUN set -x \
+    && curl -s -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz \
     && echo "${ZLIB_HASH}  zlib-${ZLIB_VERSION}.tar.gz" | sha256sum -c \
     && tar -xzf zlib-${ZLIB_VERSION}.tar.gz \
     && rm zlib-${ZLIB_VERSION}.tar.gz \
@@ -87,7 +96,8 @@ RUN curl -s -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz \
 # open ssl
 ARG OPENSSL_VERSION=1.0.2p
 ARG OPENSSL_HASH=50a98e07b1a89eb8f6a99477f262df71c6fa7bef77df4dc83025a2845c827d00
-RUN curl -s -O https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz \
+RUN set -x \
+    && curl -s -O https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz \
     && echo "${OPENSSL_HASH}  openssl-${OPENSSL_VERSION}.tar.gz" | sha256sum -c \
     && tar -xzf openssl-${OPENSSL_VERSION}.tar.gz \
     && rm openssl-${OPENSSL_VERSION}.tar.gz \
@@ -103,20 +113,21 @@ RUN curl -s -O https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz
     && make install
 
 # ZMQ
-ARG ZMQ_VERSION=master
-ARG ZMQ_HASH=501d0815bf2b0abb93be8214fc66519918ef6c40
-RUN git clone https://github.com/zeromq/libzmq.git -b ${ZMQ_VERSION} \
+ARG ZMQ_VERSION=v4.3.2
+ARG ZMQ_HASH=a84ffa12b2eb3569ced199660bac5ad128bff1f0
+RUN set -x \
+    && git clone https://github.com/zeromq/libzmq.git -b ${ZMQ_VERSION} \
     && cd libzmq \
-    && git checkout ${ZMQ_HASH} \
+    && test `git rev-parse HEAD` = ${ZMQ_HASH} || exit 1 \
     && ./autogen.sh \
     && CC=clang CXX=clang++ ./configure --prefix=${PREFIX} --host=x86-linux-android --enable-static --disable-shared \
     && make -j${NPROC} \
     && make install
 
 # Sodium
-ARG SODIUM_VERSION=1.0.16
-ARG SODIUM_HASH=675149b9b8b66ff44152553fb3ebf9858128363d
-RUN set -ex \
+ARG SODIUM_VERSION=1.0.18
+ARG SODIUM_HASH=4f5e89fa84ce1d178a6765b8b46f2b6f91216677
+RUN set -x \
     && git clone https://github.com/jedisct1/libsodium.git -b ${SODIUM_VERSION} \
     && cd libsodium \
     && test `git rev-parse HEAD` = ${SODIUM_HASH} || exit 1 \
@@ -127,7 +138,7 @@ RUN set -ex \
 
 COPY . /src
 ARG NPROC=4
-RUN set -ex \
+RUN set -x \
     && cd /src \
     && CMAKE_INCLUDE_PATH="${PREFIX}/include" \
        CMAKE_LIBRARY_PATH="${PREFIX}/lib" \
@@ -135,6 +146,6 @@ RUN set -ex \
        USE_SINGLE_BUILDDIR=1 \
        PATH=${HOST_PATH} make release-static-android-x86-wallet_api -j${NPROC}
 
-RUN set -ex \
+RUN set -x \
     && cd /src/build/release \
     && find . -path ./lib -prune -o -name '*.a' -exec cp '{}' lib \;
diff --git a/external-libs/android64.Dockerfile b/external-libs/android64.Dockerfile
index e80b4d7..00a90ff 100644
--- a/external-libs/android64.Dockerfile
+++ b/external-libs/android64.Dockerfile
@@ -1,20 +1,22 @@
 FROM debian:stable
 
-RUN apt-get update && apt-get install -y unzip automake build-essential curl file pkg-config git python libtool libtinfo5
+RUN set -x && apt-get update && apt-get install -y unzip automake build-essential curl file pkg-config git python libtool libtinfo5
 
 WORKDIR /opt/android
 ## INSTALL ANDROID SDK
 ENV ANDROID_SDK_REVISION 4333796
 ENV ANDROID_SDK_HASH 92ffee5a1d98d856634e8b71132e8a95d96c83a63fde1099be3d86df3106def9
-RUN curl -s -O https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_REVISION}.zip \
+RUN set -x \
+    && curl -s -O https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_REVISION}.zip \
     && echo "${ANDROID_SDK_HASH}  sdk-tools-linux-${ANDROID_SDK_REVISION}.zip" | sha256sum -c \
     && unzip sdk-tools-linux-${ANDROID_SDK_REVISION}.zip \
     && rm -f sdk-tools-linux-${ANDROID_SDK_REVISION}.zip
 
 ## INSTALL ANDROID NDK
-ENV ANDROID_NDK_REVISION 17b
-ENV ANDROID_NDK_HASH 5dfbbdc2d3ba859fed90d0e978af87c71a91a5be1f6e1c40ba697503d48ccecd
-RUN curl -s -O https://dl.google.com/android/repository/android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip \
+ENV ANDROID_NDK_REVISION 17c
+ENV ANDROID_NDK_HASH 3f541adbd0330a9205ba12697f6d04ec90752c53d6b622101a2a8a856e816589
+RUN set -x \
+    && curl -s -O https://dl.google.com/android/repository/android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip \
     && echo "${ANDROID_NDK_HASH}  android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip" | sha256sum -c \
     && unzip android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip \
     && rm -f android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip
@@ -25,25 +27,29 @@ ENV ANDROID_NDK_ROOT ${WORKDIR}/android-ndk-r${ANDROID_NDK_REVISION}
 ENV PREFIX /opt/android/prefix
 
 ENV TOOLCHAIN_DIR ${WORKDIR}/toolchain-arm
-RUN ${ANDROID_NDK_ROOT}/build/tools/make_standalone_toolchain.py \
+RUN set -x \
+    && ${ANDROID_NDK_ROOT}/build/tools/make_standalone_toolchain.py \
          --arch arm64 \
          --api 21 \
          --install-dir ${TOOLCHAIN_DIR} \
          --stl=libc++
 
 #INSTALL cmake
-ENV CMAKE_VERSION 3.12.1
-RUN cd /usr \
-    && curl -s -O https://cmake.org/files/v3.12/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
+ARG CMAKE_VERSION=3.14.6
+ARG CMAKE_HASH=82e08e50ba921035efa82b859c74c5fbe27d3e49a4003020e3c77618a4e912cd
+RUN set -x \
+    && cd /usr \
+    && curl -L -s -O https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
+    && echo "${CMAKE_HASH}  cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz" | sha256sum -c \
     && tar -xzf /usr/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
     && rm -f /usr/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz
 ENV PATH /usr/cmake-${CMAKE_VERSION}-Linux-x86_64/bin:$PATH
 
 ## Boost
-ARG BOOST_VERSION=1_68_0
-ARG BOOST_VERSION_DOT=1.68.0
-ARG BOOST_HASH=7f6130bc3cf65f56a618888ce9d5ea704fa10b462be126ad053e80e553d6d8b7
-RUN set -ex \
+ARG BOOST_VERSION=1_70_0
+ARG BOOST_VERSION_DOT=1.70.0
+ARG BOOST_HASH=430ae8354789de4fd19ee52f3b1f739e1fba576f0aded0897c3c2bc00fb38778
+RUN set -x \
     && curl -s -L -o  boost_${BOOST_VERSION}.tar.bz2 https://dl.bintray.com/boostorg/release/${BOOST_VERSION_DOT}/source/boost_${BOOST_VERSION}.tar.bz2 \
     && echo "${BOOST_HASH}  boost_${BOOST_VERSION}.tar.bz2" | sha256sum -c \
     && tar -xvf boost_${BOOST_VERSION}.tar.bz2 \
@@ -57,9 +63,10 @@ ENV PATH $TOOLCHAIN_DIR/aarch64-linux-android/bin:$TOOLCHAIN_DIR/bin:$PATH
 ARG NPROC=1
 
 # Build iconv for lib boost locale
-ENV ICONV_VERSION 1.15
-ENV ICONV_HASH  ccf536620a45458d26ba83887a983b96827001e92a13847b45e4925cc8913178
-RUN curl -s -O http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${ICONV_VERSION}.tar.gz \
+ENV ICONV_VERSION 1.16
+ENV ICONV_HASH e6a1b1b589654277ee790cce3734f07876ac4ccfaecbee8afa0b649cf529cc04
+RUN set -x \
+    && curl -s -O http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${ICONV_VERSION}.tar.gz \
     && echo "${ICONV_HASH}  libiconv-${ICONV_VERSION}.tar.gz" | sha256sum -c \
     && tar -xzf libiconv-${ICONV_VERSION}.tar.gz \
     && rm -f libiconv-${ICONV_VERSION}.tar.gz \
@@ -68,7 +75,8 @@ RUN curl -s -O http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${ICONV_VERSION}.tar
     && make -j${NPROC} && make install
 
 ## Build BOOST
-RUN cd boost_${BOOST_VERSION} \
+RUN set -x \
+    && cd boost_${BOOST_VERSION} \
     && ./b2 --build-type=minimal link=static runtime-link=static --with-chrono --with-date_time --with-filesystem --with-program_options --with-regex --with-serialization --with-system --with-thread --with-locale --build-dir=android --stagedir=android toolset=clang threading=multi threadapi=pthread target-os=android -sICONV_PATH=${PREFIX} install -j${NPROC}
 
 #Note : we build openssl because the default lacks DSA1
@@ -76,7 +84,8 @@ RUN cd boost_${BOOST_VERSION} \
 # download, configure and make Zlib
 ENV ZLIB_VERSION 1.2.11
 ENV ZLIB_HASH c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1
-RUN curl -s -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz \
+RUN set -x \
+    && curl -s -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz \
     && echo "${ZLIB_HASH}  zlib-${ZLIB_VERSION}.tar.gz" | sha256sum -c \
     && tar -xzf zlib-${ZLIB_VERSION}.tar.gz \
     && rm zlib-${ZLIB_VERSION}.tar.gz \
@@ -87,7 +96,8 @@ RUN curl -s -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz \
 # open ssl
 ARG OPENSSL_VERSION=1.0.2p
 ARG OPENSSL_HASH=50a98e07b1a89eb8f6a99477f262df71c6fa7bef77df4dc83025a2845c827d00
-RUN curl -s -O https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz \
+RUN set -x \
+    && curl -s -O https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz \
     && echo "${OPENSSL_HASH}  openssl-${OPENSSL_VERSION}.tar.gz" | sha256sum -c \
     && tar -xzf openssl-${OPENSSL_VERSION}.tar.gz \
     && rm openssl-${OPENSSL_VERSION}.tar.gz \
@@ -103,20 +113,21 @@ RUN curl -s -O https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz
     && make install
 
 # ZMQ
-ARG ZMQ_VERSION=master
-ARG ZMQ_HASH=501d0815bf2b0abb93be8214fc66519918ef6c40
-RUN git clone https://github.com/zeromq/libzmq.git -b ${ZMQ_VERSION} \
+ARG ZMQ_VERSION=v4.3.2
+ARG ZMQ_HASH=a84ffa12b2eb3569ced199660bac5ad128bff1f0
+RUN set -x \
+    && git clone https://github.com/zeromq/libzmq.git -b ${ZMQ_VERSION} \
     && cd libzmq \
-    && git checkout ${ZMQ_HASH} \
+    && test `git rev-parse HEAD` = ${ZMQ_HASH} || exit 1 \
     && ./autogen.sh \
     && CC=clang CXX=clang++ ./configure --prefix=${PREFIX} --host=aarch64-linux-android --enable-static --disable-shared \
     && make -j${NPROC} \
     && make install
 
 # Sodium
-ARG SODIUM_VERSION=1.0.16
-ARG SODIUM_HASH=675149b9b8b66ff44152553fb3ebf9858128363d
-RUN set -ex \
+ARG SODIUM_VERSION=1.0.18
+ARG SODIUM_HASH=4f5e89fa84ce1d178a6765b8b46f2b6f91216677
+RUN set -x \
     && git clone https://github.com/jedisct1/libsodium.git -b ${SODIUM_VERSION} \
     && cd libsodium \
     && test `git rev-parse HEAD` = ${SODIUM_HASH} || exit 1 \
@@ -127,7 +138,7 @@ RUN set -ex \
 
 COPY . /src
 ARG NPROC=4
-RUN set -ex \
+RUN set -x \
     && cd /src \
     && CMAKE_INCLUDE_PATH="${PREFIX}/include" \
        CMAKE_LIBRARY_PATH="${PREFIX}/lib" \
@@ -135,6 +146,6 @@ RUN set -ex \
        USE_SINGLE_BUILDDIR=1 \
        PATH=${HOST_PATH} make release-static-android-armv8-wallet_api -j${NPROC}
 
-RUN set -ex \
+RUN set -x \
     && cd /src/build/release \
     && find . -path ./lib -prune -o -name '*.a' -exec cp '{}' lib \;
diff --git a/external-libs/android64_x86.Dockerfile b/external-libs/android64_x86.Dockerfile
index 15441d5..0bd6d55 100644
--- a/external-libs/android64_x86.Dockerfile
+++ b/external-libs/android64_x86.Dockerfile
@@ -1,20 +1,22 @@
 FROM debian:stable
 
-RUN apt-get update && apt-get install -y unzip automake build-essential curl file pkg-config git python libtool libtinfo5
+RUN set -x && apt-get update && apt-get install -y unzip automake build-essential curl file pkg-config git python libtool libtinfo5
 
 WORKDIR /opt/android
 ## INSTALL ANDROID SDK
 ENV ANDROID_SDK_REVISION 4333796
 ENV ANDROID_SDK_HASH 92ffee5a1d98d856634e8b71132e8a95d96c83a63fde1099be3d86df3106def9
-RUN curl -s -O https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_REVISION}.zip \
+RUN set -x \
+    && curl -s -O https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_REVISION}.zip \
     && echo "${ANDROID_SDK_HASH}  sdk-tools-linux-${ANDROID_SDK_REVISION}.zip" | sha256sum -c \
     && unzip sdk-tools-linux-${ANDROID_SDK_REVISION}.zip \
     && rm -f sdk-tools-linux-${ANDROID_SDK_REVISION}.zip
 
 ## INSTALL ANDROID NDK
-ENV ANDROID_NDK_REVISION 17b
-ENV ANDROID_NDK_HASH 5dfbbdc2d3ba859fed90d0e978af87c71a91a5be1f6e1c40ba697503d48ccecd
-RUN curl -s -O https://dl.google.com/android/repository/android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip \
+ENV ANDROID_NDK_REVISION 17c
+ENV ANDROID_NDK_HASH 3f541adbd0330a9205ba12697f6d04ec90752c53d6b622101a2a8a856e816589
+RUN set -x \
+    && curl -s -O https://dl.google.com/android/repository/android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip \
     && echo "${ANDROID_NDK_HASH}  android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip" | sha256sum -c \
     && unzip android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip \
     && rm -f android-ndk-r${ANDROID_NDK_REVISION}-linux-x86_64.zip
@@ -25,25 +27,29 @@ ENV ANDROID_NDK_ROOT ${WORKDIR}/android-ndk-r${ANDROID_NDK_REVISION}
 ENV PREFIX /opt/android/prefix
 
 ENV TOOLCHAIN_DIR ${WORKDIR}/toolchain
-RUN ${ANDROID_NDK_ROOT}/build/tools/make_standalone_toolchain.py \
+RUN set -x \
+    && ${ANDROID_NDK_ROOT}/build/tools/make_standalone_toolchain.py \
          --arch x86_64 \
          --api 21 \
          --install-dir ${TOOLCHAIN_DIR} \
          --stl=libc++
 
 #INSTALL cmake
-ENV CMAKE_VERSION 3.12.1
-RUN cd /usr \
-    && curl -s -O https://cmake.org/files/v3.12/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
+ARG CMAKE_VERSION=3.14.6
+ARG CMAKE_HASH=82e08e50ba921035efa82b859c74c5fbe27d3e49a4003020e3c77618a4e912cd
+RUN set -x \
+    && cd /usr \
+    && curl -L -s -O https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
+    && echo "${CMAKE_HASH}  cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz" | sha256sum -c \
     && tar -xzf /usr/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
     && rm -f /usr/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz
 ENV PATH /usr/cmake-${CMAKE_VERSION}-Linux-x86_64/bin:$PATH
 
 ## Boost
-ARG BOOST_VERSION=1_68_0
-ARG BOOST_VERSION_DOT=1.68.0
-ARG BOOST_HASH=7f6130bc3cf65f56a618888ce9d5ea704fa10b462be126ad053e80e553d6d8b7
-RUN set -ex \
+ARG BOOST_VERSION=1_70_0
+ARG BOOST_VERSION_DOT=1.70.0
+ARG BOOST_HASH=430ae8354789de4fd19ee52f3b1f739e1fba576f0aded0897c3c2bc00fb38778
+RUN set -x \
     && curl -s -L -o  boost_${BOOST_VERSION}.tar.bz2 https://dl.bintray.com/boostorg/release/${BOOST_VERSION_DOT}/source/boost_${BOOST_VERSION}.tar.bz2 \
     && echo "${BOOST_HASH}  boost_${BOOST_VERSION}.tar.bz2" | sha256sum -c \
     && tar -xvf boost_${BOOST_VERSION}.tar.bz2 \
@@ -57,9 +63,10 @@ ENV PATH $TOOLCHAIN_DIR/x86_64-linux-android/bin:$TOOLCHAIN_DIR/bin:$PATH
 ARG NPROC=1
 
 # Build iconv for lib boost locale
-ENV ICONV_VERSION 1.15
-ENV ICONV_HASH  ccf536620a45458d26ba83887a983b96827001e92a13847b45e4925cc8913178
-RUN curl -s -O http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${ICONV_VERSION}.tar.gz \
+ENV ICONV_VERSION 1.16
+ENV ICONV_HASH e6a1b1b589654277ee790cce3734f07876ac4ccfaecbee8afa0b649cf529cc04
+RUN set -x \
+    && curl -s -O http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${ICONV_VERSION}.tar.gz \
     && echo "${ICONV_HASH}  libiconv-${ICONV_VERSION}.tar.gz" | sha256sum -c \
     && tar -xzf libiconv-${ICONV_VERSION}.tar.gz \
     && rm -f libiconv-${ICONV_VERSION}.tar.gz \
@@ -68,7 +75,8 @@ RUN curl -s -O http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${ICONV_VERSION}.tar
     && make -j${NPROC} && make install
 
 ## Build BOOST
-RUN cd boost_${BOOST_VERSION} \
+RUN set -x \
+    && cd boost_${BOOST_VERSION} \
     && ./b2 --build-type=minimal link=static runtime-link=static --with-chrono --with-date_time --with-filesystem --with-program_options --with-regex --with-serialization --with-system --with-thread --with-locale --build-dir=android --stagedir=android toolset=clang threading=multi threadapi=pthread target-os=android -sICONV_PATH=${PREFIX} install -j${NPROC}
 
 #Note : we build openssl because the default lacks DSA1
@@ -76,7 +84,8 @@ RUN cd boost_${BOOST_VERSION} \
 # download, configure and make Zlib
 ENV ZLIB_VERSION 1.2.11
 ENV ZLIB_HASH c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1
-RUN curl -s -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz \
+RUN set -x \
+    && curl -s -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz \
     && echo "${ZLIB_HASH}  zlib-${ZLIB_VERSION}.tar.gz" | sha256sum -c \
     && tar -xzf zlib-${ZLIB_VERSION}.tar.gz \
     && rm zlib-${ZLIB_VERSION}.tar.gz \
@@ -87,7 +96,8 @@ RUN curl -s -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz \
 # open ssl
 ARG OPENSSL_VERSION=1.0.2p
 ARG OPENSSL_HASH=50a98e07b1a89eb8f6a99477f262df71c6fa7bef77df4dc83025a2845c827d00
-RUN curl -s -O https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz \
+RUN set -x \
+    && curl -s -O https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz \
     && echo "${OPENSSL_HASH}  openssl-${OPENSSL_VERSION}.tar.gz" | sha256sum -c \
     && tar -xzf openssl-${OPENSSL_VERSION}.tar.gz \
     && rm openssl-${OPENSSL_VERSION}.tar.gz \
@@ -103,20 +113,21 @@ RUN curl -s -O https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz
     && make install
 
 # ZMQ
-ARG ZMQ_VERSION=master
-ARG ZMQ_HASH=501d0815bf2b0abb93be8214fc66519918ef6c40
-RUN git clone https://github.com/zeromq/libzmq.git -b ${ZMQ_VERSION} \
+ARG ZMQ_VERSION=v4.3.2
+ARG ZMQ_HASH=a84ffa12b2eb3569ced199660bac5ad128bff1f0
+RUN set -x \
+    && git clone https://github.com/zeromq/libzmq.git -b ${ZMQ_VERSION} \
     && cd libzmq \
-    && git checkout ${ZMQ_HASH} \
+    && test `git rev-parse HEAD` = ${ZMQ_HASH} || exit 1 \
     && ./autogen.sh \
     && CC=clang CXX=clang++ ./configure --prefix=${PREFIX} --host=x86_64-linux-android --enable-static --disable-shared \
     && make -j${NPROC} \
     && make install
 
 # Sodium
-ARG SODIUM_VERSION=1.0.16
-ARG SODIUM_HASH=675149b9b8b66ff44152553fb3ebf9858128363d
-RUN set -ex \
+ARG SODIUM_VERSION=1.0.18
+ARG SODIUM_HASH=4f5e89fa84ce1d178a6765b8b46f2b6f91216677
+RUN set -x \
     && git clone https://github.com/jedisct1/libsodium.git -b ${SODIUM_VERSION} \
     && cd libsodium \
     && test `git rev-parse HEAD` = ${SODIUM_HASH} || exit 1 \
@@ -127,7 +138,7 @@ RUN set -ex \
 
 COPY . /src
 ARG NPROC=4
-RUN set -ex \
+RUN set -x \
     && cd /src \
     && CMAKE_INCLUDE_PATH="${PREFIX}/include" \
        CMAKE_LIBRARY_PATH="${PREFIX}/lib" \
@@ -135,6 +146,6 @@ RUN set -ex \
        USE_SINGLE_BUILDDIR=1 \
        PATH=${HOST_PATH} make release-static-android-x86_64-wallet_api -j${NPROC}
 
-RUN set -ex \
+RUN set -x \
     && cd /src/build/release \
     && find . -path ./lib -prune -o -name '*.a' -exec cp '{}' lib \;