diff --git a/.circleci/config.yml b/.circleci/config.yml
index 44db59e69..31c3c7dab 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,7 +2,7 @@ version: 2
 jobs:
   orangepi-plus2:
     docker:
-      - image: docker:18.06.0-ce-git
+      - image: circleci/golang:1.12
     working_directory: $GOPATH/src/github.com/skycoin/libskycoin
     environment:
       QEMU_PLATFORM: orangepi-plus2
@@ -12,11 +12,12 @@ jobs:
       - checkout
       - setup_remote_docker:
           version: 18.06.0-ce
+          docker_layer_caching: true
       - run: docker build  --build-arg QEMU_PLATFORM --build-arg QEMU_OS=debian --file $GOPATH/src/github.com/skycoin/libskycoin/docker/images/test-arm/Dockerfile  $GOPATH/src/github.com/skycoin/libskycoin -t skydev-test
 
   raspberrypi3:
     docker:
-      - image: docker:18.06.0-ce-git
+      - image: circleci/golang:1.12
     working_directory: $GOPATH/src/github.com/skycoin/libskycoin
     environment:
       QEMU_PLATFORM: raspberrypi3
@@ -26,11 +27,12 @@ jobs:
       - checkout
       - setup_remote_docker:
           version: 18.06.0-ce
+          docker_layer_caching: true
       - run: docker build  --build-arg QEMU_PLATFORM --build-arg QEMU_OS=debian --file $GOPATH/src/github.com/skycoin/libskycoin/docker/images/test-arm/Dockerfile  $GOPATH/src/github.com/skycoin/libskycoin -t skydev-test
 
   raspberrypi2:
     docker:
-      - image: docker:18.06.0-ce-git
+      - image: circleci/golang:1.12
     working_directory: $GOPATH/src/github.com/skycoin/libskycoin
     environment:
       QEMU_PLATFORM: raspberry-pi2
@@ -40,11 +42,12 @@ jobs:
       - checkout
       - setup_remote_docker:
           version: 18.06.0-ce
+          docker_layer_caching: true
       - run: docker build  --build-arg QEMU_PLATFORM --build-arg QEMU_OS=debian --file $GOPATH/src/github.com/skycoin/libskycoin/docker/images/test-arm/Dockerfile  $GOPATH/src/github.com/skycoin/libskycoin -t skydev-test
 
   bananapi_m1_plus:
     docker:
-      - image: docker:18.06.0-ce-git
+      - image: circleci/golang:1.12
     working_directory: $GOPATH/src/github.com/skycoin/libskycoin
     environment:
       QEMU_PLATFORM: bananapi-m1-plus
@@ -54,18 +57,20 @@ jobs:
       - checkout
       - setup_remote_docker:
           version: 18.06.0-ce
+          docker_layer_caching: true
       - run: docker build  --build-arg QEMU_PLATFORM --build-arg QEMU_OS=debian --file $GOPATH/src/github.com/skycoin/libskycoin/docker/images/test-arm/Dockerfile  $GOPATH/src/github.com/skycoin/libskycoin -t skydev-test
 
   publish-github-release_32:
     docker:
-      - image: docker:18.06.0-ce-git
+      - image: circleci/golang:1.12
+    working_directory: $GOPATH/src/github.com/skycoin/libskycoin
     steps:
       - run: mkdir -p $GOPATH/src/github.com/ $GOPATH/src/github.com/skycoin
       - checkout
       - setup_remote_docker:
           version: 18.06.0-ce
-      - run: if [[ $CIRCLE_TAG ]]; then   docker build  --build-arg SHA1=$CIRCLE_SHA1 --build-arg GITHUB_OAUTH_TOKEN --build-arg PROJECT_USERNAME=$CIRCLE_PROJECT_USERNAME --build-arg PROJECT_REPONAME=$CIRCLE_PROJECT_REPONAME --build-arg QEMU_PLATFORM=raspberrypi3 --build-arg VERSION  --file $GOPATH/src/github.com/skycoin/libskycoin/docker/images/deploy-arm/Dockerfile  $GOPATH/src/github.com/skycoin/libskycoin -t skydev-deploy ; fi
-          
+          docker_layer_caching: true
+      - run: cd $GOPATH/src/github.com/skycoin/libskycoin/ci-scripts &&  bash deploy-arm.sh
 
 workflows:
   version: 2
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 177ae866d..5f2a662d3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -37,6 +37,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Added
 
+- Be able to set a build type for lib curl.
 - Export functions in Skycoin 0.25.1 core API's
 - `skyapi` C client for Skycoin node REST at `lib/curl`.
 - Support for building `libskycoin` on ARM and 32 / 64 bits.
diff --git a/Makefile b/Makefile
index f0b29c2fe..9b27a45a7 100644
--- a/Makefile
+++ b/Makefile
@@ -26,6 +26,7 @@ BUILDLIB_DIR = $(BUILD_DIR)/libskycoin
 BUILDLIBSKYAPI_DIR = $(BUILD_DIR)/libskyapi
 LIBNAME_Linux = libskyapi.so
 LIBNAME_Darwin = libskyapi.dylib
+LIBNAME_Static = libskyapiStatic.a
 LIB_DIR = lib
 BIN_DIR = bin
 DOC_DIR = docs
@@ -103,6 +104,7 @@ build-skyapi: ## Build skyapi(libcurl based) library
 	(cd lib/curl && bash ./install_lib_curl.sh)
 	mkdir -p ./build/libskyapi
 	cp lib/curl/build/$(LIBNAME_$(UNAME_S)) ./build/libskyapi
+	cp lib/curl/build/$(LIBNAME_Static) ./build/libskyapi
 
 build: build-libc build-skyapi ## Build libraries
 
diff --git a/README.md b/README.md
index cbef32f16..d60d95103 100644
--- a/README.md
+++ b/README.md
@@ -88,7 +88,7 @@ $ make test-libc
 0. Make a PR merging the release branch into `master`
 0. Review the PR and merge it
 0. Tag the `master` branch with the version number. Version tags start with `v`, e.g. `v0.20.0`. Sign the tag. If you have your GPG key in github, creating a release on the Github website will automatically tag the release. It can be tagged from the command line with `git tag -as v0.20.0 $COMMIT_ID`, but Github will not recognize it as a "release".
-0. Release builds are created and uploaded by travis. To do it manually, checkout the master branch and follow the [create release builds instructions](#creating-release-builds).
+0. Release builds are created and uploaded by travis. To do it manually, checkout the master branch and make release.
 0. Merge changes in `master` back into `develop` branch to start working towards next stable version.
 
 #### Pre-release testing
@@ -98,6 +98,43 @@ Perform these actions before releasing:
 ```sh
 make check
 ```
+#### Release signing
+
+Releases are signed with this PGP key:
+
+`0x5801631BD27C7874`
+
+The fingerprint for this key is:
+
+```
+pub   ed25519 2017-09-01 [SC] [expires: 2023-03-18]
+      10A7 22B7 6F2F FE7B D238  0222 5801 631B D27C 7874
+uid                      GZ-C SKYCOIN <token@protonmail.com>
+sub   cv25519 2017-09-01 [E] [expires: 2023-03-18]
+```
+
+Keybase.io account: https://keybase.io/gzc 
+
+##### Alternative signing keys:
+
+Keybase.io account: https://keybase.io/olemis
+
+The fingerprint for this key is:
+
+```
+pub   rsa4096 2019-01-17 [SC] [expires: 2024-01-16]
+uid           Olemis Lang <olemis@simelo.tech>
+sub   rsa4096 2019-01-17 [E] [expires: 2024-01-16]
+```
+
+Follow the [Tor Project's instructions for verifying signatures](https://www.torproject.org/docs/verifying-signatures.html.en).
+
+If you can't or don't want to import the keys from a keyserver, the signing key is available in the repo: [gz-c.asc](gz-c.asc).
+
+Releases and their signatures can be found on the [releases page](https://github.com/skycoin/skycoin/releases).
+
+Instructions for generating a PGP key, publishing it, signing the tags and binaries:
+https://gist.github.com/gz-c/de3f9c43343b2f1a27c640fe529b067c
 
 ## Development
 
diff --git a/ci-scripts/deploy-arm.sh b/ci-scripts/deploy-arm.sh
new file mode 100644
index 000000000..40d9e74a3
--- /dev/null
+++ b/ci-scripts/deploy-arm.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -x
+
+git --version
+
+export VERSION="$(git describe --tags --exact-match HEAD)"
+
+if [[ "$VERSION" ]]; then
+	docker build  --build-arg SHA1=$CIRCLE_SHA1 --build-arg GITHUB_OAUTH_TOKEN --build-arg PROJECT_USERNAME=$CIRCLE_PROJECT_USERNAME --build-arg PROJECT_REPONAME=$CIRCLE_PROJECT_REPONAME --build-arg QEMU_PLATFORM=armv7hf --build-arg VERSION  --file $GOPATH/src/github.com/skycoin/libskycoin/docker/images/deploy-arm/Dockerfile  $GOPATH/src/github.com/skycoin/libskycoin -t skydev-deploy
+	docker build  --build-arg SHA1=$CIRCLE_SHA1 --build-arg GITHUB_OAUTH_TOKEN --build-arg PROJECT_USERNAME=$CIRCLE_PROJECT_USERNAME --build-arg PROJECT_REPONAME=$CIRCLE_PROJECT_REPONAME --build-arg QEMU_PLATFORM=aarch64 --build-arg VERSION  --file $GOPATH/src/github.com/skycoin/libskycoin/docker/images/deploy-arm/Dockerfile  $GOPATH/src/github.com/skycoin/libskycoin -t skydev-deploy
+fi
\ No newline at end of file
diff --git a/ci-scripts/docker_install_debian.sh b/ci-scripts/docker_install_debian.sh
index 5d0a3d8d1..36ac99972 100644
--- a/ci-scripts/docker_install_debian.sh
+++ b/ci-scripts/docker_install_debian.sh
@@ -1,8 +1,12 @@
 #!/usr/bin/env bash
 
 apt-get update
-apt-get install gcc-6 g++-6 curl wget -y
+apt-get install gcc-6 g++-6 wget cmake libcurl3-gnutls -y
 
 wget -c https://github.com/libcheck/check/releases/download/0.12.0/check-0.12.0.tar.gz
 tar -xzf check-0.12.0.tar.gz
-cd check-0.12.0 && ./configure --prefix=/usr --disable-static && make && sudo make install
\ No newline at end of file
+cd check-0.12.0 && ./configure --prefix=/usr --disable-static && make && sudo make install
+
+wget -c http://curl.haxx.se/download/curl-7.58.0.tar.gz
+tar -xvf curl-7.58.0.tar.gz
+cd curl-7.58.0/ && make && sudo make install
\ No newline at end of file
diff --git a/ci-scripts/docker_install_ubuntu.sh b/ci-scripts/docker_install_ubuntu.sh
index 5d0a3d8d1..7cb7dcc59 100644
--- a/ci-scripts/docker_install_ubuntu.sh
+++ b/ci-scripts/docker_install_ubuntu.sh
@@ -1,7 +1,11 @@
 #!/usr/bin/env bash
 
 apt-get update
-apt-get install gcc-6 g++-6 curl wget -y
+apt-get install gcc-6 g++-6 curl wget cmake libcurl3-gnutls -y
+
+sudo apt-get remove curl -y
+(cd deps && wget http://curl.haxx.se/download/curl-7.58.0.tar.gz && tar -xvf curl-7.58.0.tar.gz && cd curl-7.58.0/ && ./configure && make && sudo make install)
+(cd deps && git clone https://github.com/uncrustify/uncrustify.git && cd uncrustify && mkdir build && cd build && cmake .. && make && sudo make install)
 
 wget -c https://github.com/libcheck/check/releases/download/0.12.0/check-0.12.0.tar.gz
 tar -xzf check-0.12.0.tar.gz
diff --git a/docker/images/deploy-arm/Dockerfile b/docker/images/deploy-arm/Dockerfile
index 3c446de9c..6efa7580e 100644
--- a/docker/images/deploy-arm/Dockerfile
+++ b/docker/images/deploy-arm/Dockerfile
@@ -1,10 +1,11 @@
 ARG QEMU_PLATFORM
 FROM balenalib/${QEMU_PLATFORM}-debian-golang
-
+ARG QEMU_PLATFORM
 ARG GITHUB_OAUTH_TOKEN
 ARG PROJECT_USERNAME
 ARG PROJECT_REPONAME
 ARG SHA1
+ARG VERSION
 ADD . $GOPATH/src/github.com/skycoin/libskycoin/
 
 RUN [ "cross-build-start" ]
@@ -15,12 +16,11 @@ RUN make -C $GOPATH/src/github.com/skycoin/libskycoin dep
 RUN go get github.com/gz-c/gox
 RUN go get -t ./...
 ENV CGO_ENABLED=1
-RUN export VERSION="$(git describe --tags --exact-match HEAD 2> /dev/null)"
-RUN export ARCH="$(uname -m)"
-RUN export OS="$(uname -s)"
+ENV ARCH=${QEMU_PLATFORM}
+ENV OS="Linux"
 RUN make -C $GOPATH/src/github.com/skycoin/libskycoin build
-RUN tar -c -z -f libskycoin-${VERSION}-${OS}-${ARCH}.tar.gz -C $GOPATH/src/github.com/skycoin/libskycoin/build $GOPATH/src/github.com/skycoin/libskycoin/build/*
+RUN tar -czf libskycoin-${VERSION}-${OS}-${ARCH}.tar.gz -C $GOPATH/src/github.com/skycoin/libskycoin/build $GOPATH/src/github.com/skycoin/libskycoin/build/*
 RUN go get github.com/tcnksm/ghr
 RUN ghr -t ${GITHUB_OAUTH_TOKEN} -u ${PROJECT_USERNAME} -r ${PROJECT_REPONAME} -c ${SHA1} -delete ${VERSION} libskycoin-${VERSION}-${OS}-${ARCH}.tar.gz
 
-RUN [ "cross-build-end" ]
+RUN [ "cross-build-end" ]
\ No newline at end of file
diff --git a/docker/images/test-arm/Dockerfile b/docker/images/test-arm/Dockerfile
index d9bfa0690..804a63730 100644
--- a/docker/images/test-arm/Dockerfile
+++ b/docker/images/test-arm/Dockerfile
@@ -21,4 +21,4 @@ RUN make -C $GOPATH/src/github.com/skycoin/libskycoin test-libc
 RUN [ "cross-build-end" ]
 
 WORKDIR $GOPATH/src/github.com/skycoin
-VOLUME $GOPATH/src/
+VOLUME $GOPATH/src/
\ No newline at end of file
diff --git a/lib/cgo/tests/testutils/libsky_assert.c b/lib/cgo/tests/testutils/libsky_assert.c
index ca1e146aa..d36e20283 100644
--- a/lib/cgo/tests/testutils/libsky_assert.c
+++ b/lib/cgo/tests/testutils/libsky_assert.c
@@ -63,13 +63,14 @@ GoInt_ isSigEq(cipher__Sig *sig1, cipher__Sig *sig2) {
   return memcmp((void *)sig1, (void *)sig2, sizeof(cipher__Sig)) == 0;
 }
 
-GoInt_ isU8Eq(unsigned char p1[], unsigned char p2[], size_t len) {
-
-  if (strncmp(p1, p2, len) == 0) {
-    
+GoInt_ isU8Eq(unsigned char p1[], unsigned char p2[], size_t len)
+{
+    for (GoInt i = 0; i < len; i++) {
+        if (p1[i] != p2[i]) {
+            return 0;
+        }
+    }
     return 1;
-  }
-  return 0;
 }
 
 GoInt_ isSHA256Eq(cipher__SHA256 *sh1, cipher__SHA256 *sh2) {
diff --git a/lib/curl/CMakeLists.txt b/lib/curl/CMakeLists.txt
index ad3766d19..6f4dfd59f 100644
--- a/lib/curl/CMakeLists.txt
+++ b/lib/curl/CMakeLists.txt
@@ -6,7 +6,7 @@ project(CGenerator)
 #set(CMAKE_C_VISIBILITY_PRESET default)
 #set(CMAKE_CXX_VISIBILITY_PRESET default)
 #set(CMAKE_VISIBILITY_INLINES_HIDDEN OFF)
-set(CMAKE_BUILD_TYPE Debug)
+set(CMAKE_BUILD_TYPE Release)
 
 set(pkgName "skyapi")
 
@@ -116,11 +116,14 @@ set(HDRS
 include_directories(${CURL_INCLUDE_DIR})
 # Add library with project file with projectname as library name
 add_library(${pkgName} SHARED ${SRCS} ${HDRS})
+add_library(${pkgName}Static STATIC ${SRCS} ${HDRS})
 # Link dependent libraries
 target_link_libraries(${pkgName} ${CURL_LIBRARIES})
 #install library to destination
 install(TARGETS ${pkgName} DESTINATION ${CMAKE_INSTALL_PREFIX})
 
+unset(CMAKE_BUILD_TYPE CACHE)
+
 # Setting file variables to null
 #set(SRCS "")
 #set(HDRS "")
diff --git a/lib/curl/install_lib_curl.sh b/lib/curl/install_lib_curl.sh
index 6842eb5b7..fff2965f9 100755
--- a/lib/curl/install_lib_curl.sh
+++ b/lib/curl/install_lib_curl.sh
@@ -7,7 +7,7 @@ cd build
 #echo "brew ls --verbose curl"
 #brew ls --verbose curl
 # for normal install use following command
-cmake -DCMAKE_VERBOSE_MAKEFILE=ON ..
+cmake -DCMAKE_BUILD_TYPE=Release ..
 grep -R object_convertToJSON ../../
 make
 sudo make install
diff --git a/lib/swig/dynamic/mem.i b/lib/swig/dynamic/mem.i
index 382cee1f8..03c68d100 100644
--- a/lib/swig/dynamic/mem.i
+++ b/lib/swig/dynamic/mem.i
@@ -11,12 +11,12 @@
 
 /* Handle out typemap. */
 %typemap(argout) Handle* {
-	%append_output( SWIG_From_long(*$1) );
+	%append_output( SWIG_From_long_SS_long(*$1) );
 }
 
 /* Handle not as pointer is input. */
 %typemap(in) Handle {
-	SWIG_AsVal_long($input, (long*)&$1);
+	SWIG_AsVal_long_SS_long($input, (long*)&$1);
 }
 
 
diff --git a/lib/swig/dynamic/typemaps.i b/lib/swig/dynamic/typemaps.i
index 998c30226..3334228e9 100644
--- a/lib/swig/dynamic/typemaps.i
+++ b/lib/swig/dynamic/typemaps.i
@@ -1,6 +1,11 @@
 /*GoInt64* as function return typemap*/
 %typemap(argout) GoInt64* {
-	%append_output( SWIG_From_long( *$1 ) );
+	%append_output( SWIG_From_long_SS_long( *$1 ) );
+}
+
+/*GoUint64* as function return typemap*/
+%typemap(argout) GoUint64* {
+	%append_output( SWIG_From_unsigned_SS_long_SS_long( *$1 ) );
 }
 
 /*