diff --git a/libs/aarch64-linux-android/librln.a b/libs/aarch64-linux-android/librln.a
new file mode 100644
index 0000000..92e697c
Binary files /dev/null and b/libs/aarch64-linux-android/librln.a differ
diff --git a/libs/aarch64-unknown-linux-gnu/librln.a b/libs/aarch64-unknown-linux-gnu/librln.a
index 25f7af3..ad234a1 100644
Binary files a/libs/aarch64-unknown-linux-gnu/librln.a and b/libs/aarch64-unknown-linux-gnu/librln.a differ
diff --git a/libs/arm-unknown-linux-gnueabi/librln.a b/libs/arm-unknown-linux-gnueabi/librln.a
new file mode 100644
index 0000000..fd502c5
Binary files /dev/null and b/libs/arm-unknown-linux-gnueabi/librln.a differ
diff --git a/libs/arm-unknown-linux-gnueabihf/librln.a b/libs/arm-unknown-linux-gnueabihf/librln.a
new file mode 100644
index 0000000..2bb803b
Binary files /dev/null and b/libs/arm-unknown-linux-gnueabihf/librln.a differ
diff --git a/libs/armv7-linux-androideabi/librln.a b/libs/armv7-linux-androideabi/librln.a
index 5f8ec47..2499281 100644
Binary files a/libs/armv7-linux-androideabi/librln.a and b/libs/armv7-linux-androideabi/librln.a differ
diff --git a/rln/librln.h b/rln/librln.h
index b7c6a71..60e4545 100644
--- a/rln/librln.h
+++ b/rln/librln.h
@@ -45,6 +45,11 @@ bool set_leaves_from(struct RLN *ctx, uintptr_t index, const struct Buffer *inpu
 
 bool init_tree_with_leaves(struct RLN *ctx, const struct Buffer *input_buffer);
 
+bool atomic_operation(struct RLN *ctx,
+                      uintptr_t index,
+                      const struct Buffer *leaves_buffer,
+                      const struct Buffer *indices_buffer);
+
 bool get_root(const struct RLN *ctx, struct Buffer *output_buffer);
 
 bool get_proof(const struct RLN *ctx, uintptr_t index, struct Buffer *output_buffer);
diff --git a/rln/wrapper.go b/rln/wrapper.go
index 1a5e336..0d6c153 100644
--- a/rln/wrapper.go
+++ b/rln/wrapper.go
@@ -132,6 +132,12 @@ func (r *RLN) SetLeavesFrom(index uint, idcommitments []byte) bool {
 	return bool(C.set_leaves_from(r.ptr, C.uintptr_t(index), idCommBuffer))
 }
 
+func (r *RLN) AtomicOperation(index uint, leaves []byte, indices []byte) bool {
+	leavesBuffer := toCBufferPtr(leaves)
+	indicesBuffer := toCBufferPtr(indices)
+	return bool(C.atomic_operation(r.ptr, C.uintptr_t(index), leavesBuffer, indicesBuffer))
+}
+
 func (r *RLN) DeleteLeaf(index uint) bool {
 	return bool(C.delete_leaf(r.ptr, C.uintptr_t(index)))
 }
diff --git a/scripts/build.sh b/scripts/build.sh
index 02abf19..a2a2259 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -4,26 +4,26 @@ export RUSTFLAGS="-Ccodegen-units=1"
 
 rustup default stable
 
-cargo install cross --git https://github.com/cross-rs/cross --branch main
+cargo install cross
 
-pushd zerokit/rln
+platforms=(
+'aarch64-unknown-linux-gnu'
+'armv7-linux-androideabi'
+'arm-unknown-linux-gnueabi'
+'arm-unknown-linux-gnueabihf'
+'aarch64-linux-android'
+)
 
-cargo clean
-
-cross build --release --lib --target=aarch64-unknown-linux-gnu
-cross build --release --lib --target=armv7-linux-androideabi
-#cross build --release --lib --target=arm-unknown-linux-gnueabi
-#cross build --release --lib --target=arm-unknown-linux-gnueabihf
-#cross build --release --lib --target=aarch64-linux-android
-
-popd
-
-DIRECTORY=./libs
-TOOLS_DIR=`dirname $0`
-COMPILE_DIR=${TOOLS_DIR}/../zerokit/target
-for platform in `ls ${COMPILE_DIR} | grep -v release | grep -v debug | grep -v CACHEDIR.TAG`
+for platform in ${platforms[*]}
 do
-  PLATFORM_DIR=${DIRECTORY}/$platform
-  mkdir -p ${PLATFORM_DIR}
-  cp ${COMPILE_DIR}/$platform/release/librln.a ${PLATFORM_DIR}
+  mkdir -p ./libs/${platform}
+  pushd zerokit/rln
+  cargo clean
+  cross build --release --lib --target=${platform}
+  cp ../target/${platform}/release/librln.a ../../libs/${platform}/.
+  popd
 done
+
+
+
+
diff --git a/zerokit b/zerokit
index 2e868d6..c2d386c 160000
--- a/zerokit
+++ b/zerokit
@@ -1 +1 @@
-Subproject commit 2e868d6cbf68ee0f87975a89a25aa0333971d398
+Subproject commit c2d386cb749f551541bb34c4386a3849485356f9