diff --git a/src/util/checksum.rs b/src/util/checksum.rs
deleted file mode 100644
index 213d3b4..0000000
--- a/src/util/checksum.rs
+++ /dev/null
@@ -1,64 +0,0 @@
-use serde::bytes::ByteBuf;
-
-use blake2::blake2b::Blake2b;
-
-#[derive(Clone, Debug, Copy)]
-#[allow(non_camel_case_types)]
-pub enum ChecksumType {
-    Blake2_256
-}
-serde_impl!(ChecksumType(u64) {
-    Blake2_256 => 1
-});
-
-impl ChecksumType {
-    #[inline]
-    pub fn from(name: &str) -> Result<Self, &'static str> {
-        match name {
-            "blake2_256" => Ok(ChecksumType::Blake2_256),
-            _ => Err("Unsupported checksum type")
-        }
-    }
-
-    #[inline]
-    pub fn name(&self) -> &'static str {
-        match *self {
-            ChecksumType::Blake2_256 => "blake2_256",
-        }
-    }
-}
-
-
-pub type Checksum = (ChecksumType, ByteBuf);
-
-#[allow(non_camel_case_types, unknown_lints, large_enum_variant)]
-pub enum ChecksumCreator {
-    Blake2_256(Blake2b)
-}
-
-impl ChecksumCreator {
-    #[inline]
-    pub fn new(type_: ChecksumType) -> Self {
-        match type_ {
-            ChecksumType::Blake2_256 => ChecksumCreator::Blake2_256(Blake2b::new(32))
-        }
-    }
-
-    #[inline]
-    pub fn update(&mut self, data: &[u8]) {
-        match *self {
-            ChecksumCreator::Blake2_256(ref mut state) => state.update(data)
-        }
-    }
-
-    #[inline]
-    pub fn finish(self) -> Checksum {
-        match self {
-            ChecksumCreator::Blake2_256(state) => {
-                let mut buf = Vec::with_capacity(32);
-                buf.extend_from_slice(state.finalize().as_bytes());
-                (ChecksumType::Blake2_256, buf.into())
-            }
-        }
-    }
-}
diff --git a/src/util/mod.rs b/src/util/mod.rs
index c162fe5..0e26fc1 100644
--- a/src/util/mod.rs
+++ b/src/util/mod.rs
@@ -1,4 +1,3 @@
-//mod checksum; not used
 mod compression;
 mod encryption;
 mod hash;