diff --git a/projects/bls-signatures/Dockerfile b/projects/bls-signatures/Dockerfile
index aeaaf43cbeaa..c5ed1cf2ee87 100644
--- a/projects/bls-signatures/Dockerfile
+++ b/projects/bls-signatures/Dockerfile
@@ -18,13 +18,13 @@ FROM gcr.io/oss-fuzz-base/base-builder-rust
 RUN apt-get update && apt-get install -y make autoconf automake libtool wget python lzip libgmp-dev
 RUN git clone --depth 1 https://github.com/guidovranken/cryptofuzz
 RUN git clone --depth 1 https://github.com/supranational/blst
-RUN git clone --depth 1 https://github.com/Chia-Network/bls-signatures.git
 RUN git clone --depth 1 https://github.com/herumi/mcl.git
 RUN git clone --depth 1 https://github.com/randombit/botan.git
-RUN wget https://boostorg.jfrog.io/artifactory/main/release/1.74.0/source/boost_1_74_0.tar.bz2
-RUN wget --no-check-certificate https://gmplib.org/download/gmp/gmp-6.2.1.tar.lz
-RUN test "$(sha256sum gmp-6.2.1.tar.lz)" = "2c7f4f0d370801b2849c48c9ef3f59553b5f1d3791d070cffb04599f9fc67b41  gmp-6.2.1.tar.lz"
-RUN wget https://download.libsodium.org/libsodium/releases/libsodium-1.0.18-stable.tar.gz
+RUN git clone --depth 1 https://github.com/mratsim/constantine
+RUN wget -q https://boostorg.jfrog.io/artifactory/main/release/1.74.0/source/boost_1_74_0.tar.bz2
+RUN wget -q https://ftp.gnu.org/gnu/gmp/gmp-6.2.1.tar.lz
+RUN wget -q https://nim-lang.org/download/nim-1.6.12-linux_x64.tar.xz
+RUN wget -q https://nim-lang.org/download/nim-1.6.12-linux_x32.tar.xz
 COPY build.sh $SRC/
 # This is to fix Fuzz Introspector build by using LLVM old pass manager
 # re https://github.com/ossf/fuzz-introspector/issues/305
diff --git a/projects/bls-signatures/build.sh b/projects/bls-signatures/build.sh
index 45992d20a8bf..d0ea5d97557e 100755
--- a/projects/bls-signatures/build.sh
+++ b/projects/bls-signatures/build.sh
@@ -91,6 +91,31 @@ then
     export CXXFLAGS="$CXXFLAGS -DCRYPTOFUZZ_ARKWORKS_ALGEBRA"
 fi
 
+# Build Constantine
+if [[ "$SANITIZER" != "memory" ]]
+then
+    cd $SRC/
+    if [[ $CFLAGS != *-m32* ]]
+    then
+        tar Jxf nim-1.6.12-linux_x64.tar.xz
+    else
+        tar Jxf nim-1.6.12-linux_x32.tar.xz
+    fi
+    export NIM_PATH=$(realpath nim-1.6.12)
+
+    export CONSTANTINE_PATH=$SRC/constantine/
+
+    cd $SRC/cryptofuzz/modules/constantine/
+    if [[ $CFLAGS != *-m32* ]]
+    then
+        make
+    else
+        make -f Makefile-i386
+    fi
+
+    export CXXFLAGS="$CXXFLAGS -DCRYPTOFUZZ_CONSTANTINE"
+fi
+
 if [[ $CFLAGS = *-m32* ]]
 then
     # Build and install libgmp
@@ -128,42 +153,6 @@ cp -R $SRC/blst/ $SRC/blst_normal/
 cd $SRC/blst_normal/
 build_blst
 
-# Build Chia
-if [[ $CFLAGS != *sanitize=memory* && $CFLAGS != *-m32* ]]
-then
-    # Build and install libsodium
-    cd $SRC/
-    mkdir $SRC/libsodium-install
-    tar zxf libsodium-1.0.18-stable.tar.gz
-    cd $SRC/libsodium-stable/
-    autoreconf -ivf
-    ./configure --prefix="$SRC/libsodium-install/"
-    make -j$(nproc)
-    make install
-    export CXXFLAGS="$CXXFLAGS -I $SRC/libsodium-install/include/"
-    export LINK_FLAGS="$LINK_FLAGS $SRC/libsodium-install/lib/libsodium.a"
-
-    cd $SRC/bls-signatures/
-    mkdir build/
-    cd build/
-    if [[ $CFLAGS = *-m32* ]]
-    then
-        export CHIA_ARCH="X86"
-    else
-        export CHIA_ARCH="X64"
-    fi
-    cmake .. -DBUILD_BLS_PYTHON_BINDINGS=0 -DBUILD_BLS_TESTS=0 -DBUILD_BLS_BENCHMARKS=0 -DARCH=$CHIA_ARCH
-    make -j$(nproc)
-    export CHIA_BLS_LIBBLS_A_PATH=$(realpath src/libbls.a)
-    export CHIA_BLS_LIBRELIC_S_A_PATH=$(realpath _deps/relic-build/lib/librelic_s.a)
-    export CHIA_BLS_LIBSODIUM_A_PATH=$(realpath _deps/sodium-build/libsodium.a)
-    export CHIA_BLS_INCLUDE_PATH=$(realpath ../src/)
-    export CHIA_BLS_RELIC_INCLUDE_PATH_1=$(realpath _deps/relic-build/include/)
-    export CHIA_BLS_RELIC_INCLUDE_PATH_2=$(realpath _deps/relic-src/include/)
-    export LINK_FLAGS="$LINK_FLAGS -lgmp"
-    export CXXFLAGS="$CXXFLAGS -DCRYPTOFUZZ_CHIA_BLS"
-fi
-
 # Build mcl
 if [[ "$SANITIZER" != "memory" && $CFLAGS != *-m32* ]]
 then
@@ -222,12 +211,6 @@ make -B
 cd $SRC/cryptofuzz/modules/blst/
 make -B
 
-if [[ $CFLAGS != *sanitize=memory* && $CFLAGS != *-m32* ]]
-then
-    cd $SRC/cryptofuzz/modules/chia_bls/
-    make -B
-fi
-
 if [[ $CFLAGS != *sanitize=memory* && $CFLAGS != *-m32* ]]
 then
     cd $SRC/cryptofuzz/modules/mcl/