diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2396237..d0195d1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -19,7 +19,6 @@ set (PROGRAM_EXE ${CMAKE_PROJECT_NAME})
 set (PROGRAM_SOURCE
 	src/string.cpp
 	src/base58.cpp
-	src/checksum.cpp
 	src/WIF.cpp
 	src/key_search.cpp
 	src/key_search_helpers.cpp
diff --git a/src/checksum.cpp b/src/checksum.cpp
deleted file mode 100644
index 9f46b0e..0000000
--- a/src/checksum.cpp
+++ /dev/null
@@ -1,51 +0,0 @@
-/**
- * MIT License
- *
- * Copyright (c) 2019-2020 EOS Sw/eden
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-#include <cstring>
-#include "crypto/hash.h"
-#include "checksum.h"
-
-namespace eoskeygen {
-
-inline void sha256d(const unsigned char *data, std::size_t len, sha256_t *out) {
-	sha256(data, len, out);
-	sha256(out->data, 32, out);
-}
-
-#define checksum_impl(func, type) \
-	checksum_t checksum_##func(const unsigned char *data, std::size_t len) { 	\
-																				\
-		checksum_t crc;															\
-		type hash;																\
-																				\
-		func(data, len, &hash);													\
-																				\
-		std::memcpy(crc.data(), &hash, crc.size());								\
-		return crc;																\
-	}
-
-
-checksum_impl(sha256d, sha256_t)
-checksum_impl(ripemd160, ripemd160_t)
-
-} // namespace eosio-keygen
diff --git a/src/checksum.h b/src/checksum.h
index b48f783..a67a42b 100644
--- a/src/checksum.h
+++ b/src/checksum.h
@@ -25,7 +25,9 @@
 #define EOSIOKEYGEN_CHECKSUM_H
 
 #include <cstddef>
+#include <cstring>
 #include <array>
+#include "crypto/hash.h"
 
 namespace eoskeygen {
 
@@ -33,9 +35,19 @@ namespace eoskeygen {
 
 typedef std::array<unsigned char, CHECKSUM_SIZE> checksum_t;
 
-checksum_t checksum_sha256d(const unsigned char *data, std::size_t len);
+template <typename T, T* (*F)(const unsigned char *, std::size_t, T*)>
+inline checksum_t checksum(const unsigned char* data, std::size_t len) {
+	checksum_t crc;
+	T hash;
 
-checksum_t checksum_ripemd160(const unsigned char *data, std::size_t len);
+	F(data, len, &hash);
+	std::memcpy(crc.data(), &hash, crc.size());
+	return crc;
+}
+
+#define checksum_sha256 checksum<sha256_t, sha256>
+#define checksum_sha256d checksum<sha256_t, sha256d>
+#define checksum_ripemd160 checksum<ripemd160_t, ripemd160>
 
 } // namespace eoskeygen