diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 00000000000000..e9f648b0a37e2e
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,252 @@
+# Copyright (c) 2020 The Wagerr developers
+version: 2.1
+jobs:
+  lint_all:
+    docker:
+      - image: circleci/buildpack-deps:18.04
+        user: root
+    parallelism: 4
+    environment:
+      HOST: x86_64-linux-gnu
+      JOBS: 4
+    steps:
+    - run:
+        command: |
+            apt-get -y update
+            apt-get -y install python-pip
+            git clone --depth 1 https://github.com/wagerr/wagerr .
+            source .circleci/lint_04_install.sh
+            source .ciricleci/lint_05_before_script.sh
+            # LevelDB
+            git remote add -f leveldb https://github.com/bitcoin-core/leveldb.git
+            # secp256k1
+            git remote add -f secp256k1 https://github.com/bitcoin-core/secp256k1.git
+            # ctaes
+            git remote add -f ctaes https://github.com/bitcoin-core/ctaes
+            # univalue
+            git remote add -f univalue https://github.com/jgarzik/univalue
+            git rm -rf src/leveldb
+            git rm -rf src/secp256k1
+            git rm -rf src/crypto/ctaes
+            git rm -rf src/univalue
+            git add .
+            git config --global user.email "lint@dev.null"
+            git config --global user.name "Lint Check"
+            git commit -m "Set up for subtrees"
+            # leveldb
+            git subtree add --prefix src/leveldb leveldb bitcoin-fork --squash
+            # secp256k1
+            git subtree add --prefix src/secp256k1 secp256k1 master --squash
+            # ctaes
+            git subtree add --prefix src/crypto/ctaes ctaes master --squash
+            # univalue
+            git subtree add --prefix src/univalue univalue 9f0b9975925b202ab130714e5422f8dd8bf40ac3 --squash
+            # snap
+            source .circleci/lint_06_script.sh
+  x86_64_bionic:
+    docker:
+      - image: circleci/buildpack-deps:18.04
+        user: root
+    environment:
+      HOST: x86_64-linux-gnu
+      JOBS: 4
+    steps:
+      - checkout
+      - run:
+          command: |
+            git submodule update --init --recursive
+            apt-get -y update
+            apt-get -y install pkg-config autoconf libtool automake bsdmainutils ca-certificates python3 cmake libxkbcommon0 gcc-8 g++-8 libpython3.6-dev python3-distutils
+            update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 100
+            update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 100
+            update-alternatives --install /usr/bin/${HOST}-gcc ${HOST}-gcc /usr/bin/${HOST}-gcc-8 100
+            update-alternatives --install /usr/bin/${HOST}-g++ ${HOST}-g++ /usr/bin/${HOST}-g++-8 100
+            make -j${JOBS} -C depends HOST=${HOST}
+            ./autogen.sh
+            ./configure --host=${HOST} --prefix=`pwd`/depends/${HOST} --enable-zmq --enable-glibc-back-compat --enable-reduce-exports LDFLAGS=-static-libstdc++
+            make -j${JOBS}
+            git clone http://github.com/wagerr/wagerr_hash
+            cd wagerr_hash
+            python3 setup.py install
+            cd -
+            test/functional/test_runner.py
+  x86_64_focal:
+    docker:
+      - image: circleci/buildpack-deps:focal
+        user: root
+    environment:
+      HOST: x86_64-linux-gnu
+      JOBS: 4
+    steps:
+      - checkout
+      - run:
+          command: |
+            git submodule update --init --recursive
+            apt-get -y update
+            apt-get -y install pkg-config autoconf libtool automake bsdmainutils ca-certificates python3 cmake libxkbcommon0 gcc-8 g++-8 libpython3.9-dev python3-distutils
+            update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 100
+            update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 100
+            update-alternatives --install /usr/bin/${HOST}-gcc ${HOST}-gcc /usr/bin/${HOST}-gcc-8 100
+            update-alternatives --install /usr/bin/${HOST}-g++ ${HOST}-g++ /usr/bin/${HOST}-g++-8 100
+            make -j${JOBS} -C depends HOST=${HOST}
+            ./autogen.sh
+            ./configure --host=${HOST} --prefix=`pwd`/depends/${HOST} --enable-zmq --enable-glibc-back-compat --enable-reduce-exports LDFLAGS=-static-libstdc++
+            make -j${JOBS}
+  i686_bionic:
+    docker:
+      - image: circleci/buildpack-deps:18.04
+        user: root
+    environment:
+      HOST: i686-linux-gnu
+      JOBS: 4
+    steps:
+      - checkout
+      - run:
+          command: |
+            git submodule update --init --recursive
+            apt-get -y update
+            apt-get -y install pkg-config autoconf libtool automake bsdmainutils ca-certificates python3 cmake libxkbcommon0 g++-8-multilib gcc-8-multilib gcc-8 g++-8
+            update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 100
+            update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 100
+            make -j${JOBS} -C depends HOST=${HOST}
+            ./autogen.sh
+            ./configure --host=${HOST} --prefix=`pwd`/depends/${HOST} --enable-zmq --enable-glibc-back-compat --enable-reduce-exports LDFLAGS=-static-libstdc++
+            make -j${JOBS}
+  arm32_bionic:
+    docker:
+      - image: ioncoin/gitian:latest
+        user: root
+    environment:
+      HOST: arm-linux-gnueabihf
+      JOBS: 4
+      HOST_LDFLAGS: "-static-libstdc++"
+    steps:
+      - checkout
+      - run:
+          command: |
+            git submodule update --init --recursive
+            apt-get -y update
+            apt-get -y install pkg-config autoconf libtool automake bsdmainutils ca-certificates python3 cmake libxkbcommon0 gcc-8 g++-8 g++-8-arm-linux-gnueabihf gcc-8-arm-linux-gnueabihf binutils-arm-linux-gnueabihf g++-8-multilib gcc-8-multilib
+            update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 100
+            update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 100
+            update-alternatives --install /usr/bin/${HOST}-gcc ${HOST}-gcc /usr/bin/${HOST}-gcc-8 100
+            update-alternatives --install /usr/bin/${HOST}-g++ ${HOST}-g++ /usr/bin/${HOST}-g++-8 100
+            make -j${JOBS} -C depends HOST=${HOST}
+            ./autogen.sh
+            ./configure --host=${HOST} --prefix=`pwd`/depends//${HOST} --enable-glibc-back-compat --enable-reduce-exports --disable-ccache --disable-maintainer-mode --disable-dependency-tracking CFLAGS="${HOST_CFLAGS}" CXXFLAGS="${HOST_CXXFLAGS}" LDFLAGS="${HOST_LDFLAGS}"
+            make -j${JOBS}
+  arm64_bionic:
+    docker:
+      - image: circleci/buildpack-deps:18.04
+        user: root
+    environment:
+      HOST: aarch64-linux-gnu
+      JOBS: 4
+    steps:
+      - checkout
+      - run:
+          command: |
+            git submodule update --init --recursive
+            apt-get -y update
+            apt-get -y install pkg-config autoconf libtool automake bsdmainutils ca-certificates python3 cmake libxkbcommon0 gcc-8 g++-8 g++-8-aarch64-linux-gnu gcc-8-aarch64-linux-gnu binutils-aarch64-linux-gnu g++-8-multilib gcc-8-multilib
+            update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 100
+            update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 100
+            update-alternatives --install /usr/bin/${HOST}-gcc ${HOST}-gcc /usr/bin/${HOST}-gcc-8 100
+            update-alternatives --install /usr/bin/${HOST}-g++ ${HOST}-g++ /usr/bin/${HOST}-g++-8 100
+            make -j${JOBS} -C depends HOST=${HOST}
+            ./autogen.sh
+            ./configure --host=${HOST} --prefix=`pwd`/depends/${HOST} --enable-glibc-back-compat --enable-reduce-exports
+            make -j${JOBS}
+  win32_bionic:
+    docker:
+      - image: circleci/buildpack-deps:18.04
+        user: root
+    environment:
+      HOST: i686-w64-mingw32
+      JOBS: 4
+    steps:
+      - checkout
+      - run:
+          command: |
+            git submodule update --init --recursive
+            apt-get -y update
+            apt-get -y install pkg-config autoconf libtool automake bsdmainutils ca-certificates python3 cmake libxkbcommon0 mingw-w64 g++-mingw-w64 g++-multilib gcc-multilib
+            update-alternatives --install /usr/bin/i686-w64-mingw32-gcc i686-w64-mingw32-gcc /usr/bin/i686-w64-mingw32-gcc-posix 100
+            update-alternatives --install /usr/bin/i686-w64-mingw32-g++ i686-w64-mingw32-g++ /usr/bin/i686-w64-mingw32-g++-posix 100
+            make -j${JOBS} -C depends HOST=${HOST}
+            ./autogen.sh
+            ./configure --host=${HOST} --prefix=`pwd`/depends/${HOST} --enable-reduce-exports
+            make -j${JOBS}
+  win64_bionic:
+    docker:
+      - image: circleci/buildpack-deps:18.04
+        user: root
+    environment:
+      HOST: x86_64-w64-mingw32
+      JOBS: 4
+    steps:
+      - checkout
+      - run:
+          command: |
+            git submodule update --init --recursive
+            apt-get -y update
+            apt-get -y install pkg-config autoconf libtool automake bsdmainutils ca-certificates python3 cmake libxkbcommon0 mingw-w64 g++-mingw-w64 g++-multilib gcc-multilib
+            update-alternatives --install /usr/bin/x86_64-w64-mingw32-gcc x86_64-w64-mingw32-gcc /usr/bin/x86_64-w64-mingw32-gcc-posix 100
+            update-alternatives --install /usr/bin/x86_64-w64-mingw32-g++ x86_64-w64-mingw32-g++ /usr/bin/x86_64-w64-mingw32-g++-posix 100
+            make -j${JOBS} -C depends HOST=${HOST}
+            ./autogen.sh
+            ./configure --host=${HOST} --prefix=`pwd`/depends/${HOST} --enable-reduce-exports
+            make -j${JOBS}
+  mac_bionic:
+    docker:
+      - image: circleci/buildpack-deps:18.04
+        user: root
+    environment:
+      HOST: x86_64-apple-darwin16
+      JOBS: 4
+      OSX_SDK: 10.11
+    steps:
+      - checkout
+      - run:
+          command: |
+            git submodule update --init --recursive
+            apt-get -y update
+            apt-get -y install pkg-config autoconf libtool automake bsdmainutils ca-certificates python3 cmake libxkbcommon0 librsvg2-bin libtiff-tools imagemagick libcap-dev libz-dev libbz2-dev python3-dev python3-setuptools fonts-tuffy g++-8-multilib gcc-8-multilib
+            wget https://github.com/gitianuser/MacOSX-SDKs/releases/download/MacOSX10.11.sdk/MacOSX10.11.sdk.tar.xz
+            mkdir -p `pwd`/depends/SDKs
+            echo "Extracting Mac SDK"
+            tar -C `pwd`/depends/SDKs -xJf ./MacOSX10.11.sdk.tar.xz
+            make -j${JOBS} -C depends HOST=${HOST}
+            ./autogen.sh
+            ./configure --host=${HOST} --prefix=`pwd`/depends/${HOST} --enable-reduce-exports --enable-werror --disable-ccache --disable-maintainer-mode --disable-dependency-tracking --disable-bench --disable-gui-tests
+
+            make -j${JOBS}
+workflows:
+  version: 2.1
+  FullCheck:
+    jobs:
+      - lint_all
+      - x86_64_bionic:
+          requires:
+            - lint_all
+      - i686_bionic:
+          requires:
+            - lint_all
+      - x86_64_focal:
+          requires:
+            - lint_all
+      - arm32_bionic:
+          requires:
+            - lint_all
+      - arm64_bionic:
+          requires:
+            - lint_all
+      - win32_bionic:
+          requires:
+            - lint_all
+      - win64_bionic:
+          requires:
+            - lint_all
+      - mac_bionic:
+          requires:
+            - lint_all
\ No newline at end of file
diff --git a/.circleci/lint_04_install.sh b/.circleci/lint_04_install.sh
new file mode 100755
index 00000000000000..2f7d7ff19f91cb
--- /dev/null
+++ b/.circleci/lint_04_install.sh
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+#
+# 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.
+
+export LC_ALL=C
+
+pip2 install codespell==1.13.0
+pip2 install flake8==3.5.0
+pip2 install vulture==0.29
+
+SHELLCHECK_VERSION=v0.6.0
+curl -s "https://storage.googleapis.com/shellcheck/shellcheck-${SHELLCHECK_VERSION}.linux.x86_64.tar.xz" | tar --xz -xf - --directory /tmp/
+export PATH="/tmp/shellcheck-${SHELLCHECK_VERSION}:${PATH}"
diff --git a/.circleci/lint_05_before_script.sh b/.circleci/lint_05_before_script.sh
new file mode 100755
index 00000000000000..28bcbb47f74898
--- /dev/null
+++ b/.circleci/lint_05_before_script.sh
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+#
+# 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.
+
+export LC_ALL=C
+
+git fetch --unshallow
diff --git a/.circleci/lint_06_script.sh b/.circleci/lint_06_script.sh
new file mode 100755
index 00000000000000..066cb041555ed5
--- /dev/null
+++ b/.circleci/lint_06_script.sh
@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+#
+# 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.
+
+export LC_ALL=C
+
+contrib/devtools/git-subtree-check.sh src/leveldb
+contrib/devtools/git-subtree-check.sh src/secp256k1
+contrib/devtools/git-subtree-check.sh src/crypto/ctaes
+contrib/devtools/git-subtree-check.sh src/univalue
+contrib/devtools/lint-whitespace.sh
\ No newline at end of file