diff --git a/include/basen/base58.hpp b/include/basen/base58.hpp
index 1fe6600..8d8fa06 100644
--- a/include/basen/base58.hpp
+++ b/include/basen/base58.hpp
@@ -17,34 +17,35 @@ namespace base58
     bool isValid(std::string_view str) noexcept;
 
     /**
-     * @throw std::overflow_error if if there is an overflow
+     * @throw basen::Exception(OVERFLOW) if there is an overflow
      */
-    size_t sizeEncoded(std::span<const uint8_t> data) noexcept;
+    size_t sizeEncoded(std::span<const uint8_t> data);
     size_t sizeDecoded(std::string_view str) noexcept;
 
     /**
      * @return number of leading chars, which should be trimmed
      * @warning contain leading zeros, returns count of them
      */
-    size_t encode(const uint8_t *data, size_t data_size, char *str, size_t str_size) noexcept;
-    std::string encode(std::span<const uint8_t> data) noexcept;
+    size_t encode(const uint8_t *data, size_t data_size, char *str, size_t str_size);
+    std::string encode(std::span<const uint8_t> data);
 
     /**
      * @return number of leading chars, which should be trimmed
      * @warning contain leading zeros, returns count of them
      */
-    size_t decode(const char *str, size_t str_size, uint8_t *data, size_t data_size) noexcept;
-    std::vector<uint8_t> decode(std::string_view str) noexcept;
+    size_t decode(const char *str, size_t str_size, uint8_t *data, size_t data_size);
+    std::vector<uint8_t> decode(std::string_view str);
 
     /**
      * @param data vector or span of data which you want to encode
      * @return encoded string + 4 first bytes of double sha256
      */
-    std::string encodeCheck(std::span<const uint8_t> data) noexcept;
+    std::string encodeCheck(std::span<const uint8_t> data);
     /**
      * @param str string or string_view which you want to decode
      * @return decoded data without 4 first bytes of double sha256
-     * @throw std::logic_error checksum incorrect
+     * @throw basen::Exception(PADDING) if str size < 4
+     * @throw basen::Exception(CHECKSUM) checksum incorrect
      */
     std::vector<uint8_t> decodeCheck(std::string_view str);
 }
\ No newline at end of file
diff --git a/include/basen/base64.hpp b/include/basen/base64.hpp
index 8c953d4..ac57815 100644
--- a/include/basen/base64.hpp
+++ b/include/basen/base64.hpp
@@ -14,7 +14,7 @@ namespace base64
     bool isValid(std::string_view str) noexcept;
 
     /**
-     * @throw basen::Exception(OVERFLOW) if if there is an overflow
+     * @throw basen::Exception(OVERFLOW) if there is an overflow
      */
     size_t sizeEncoded(std::span<const uint8_t> data);
     size_t sizeDecoded(std::string_view str) noexcept;
diff --git a/include/basen/hex.hpp b/include/basen/hex.hpp
index 3dc2412..e3b231e 100644
--- a/include/basen/hex.hpp
+++ b/include/basen/hex.hpp
@@ -14,7 +14,7 @@ namespace hex
     bool isValid(std::string_view str) noexcept;
 
     /**
-     * @throw basen::Exception(OVERFLOW) if if there is an overflow
+     * @throw basen::Exception(OVERFLOW) if there is an overflow
      */
     size_t sizeEncoded(std::span<const uint8_t> data);
     size_t sizeDecoded(std::string_view str) noexcept;
diff --git a/src/base58.cpp b/src/base58.cpp
index edcf0b8..b94f38c 100644
--- a/src/base58.cpp
+++ b/src/base58.cpp
@@ -2,6 +2,7 @@
 
 #include <basen/base58.hpp>
 #include <basen/baseN.hpp>
+#include <basen/Exception.hpp>
 #include <basen/hash/sha256.hpp>
 
 namespace base58
@@ -35,7 +36,7 @@ namespace base58
     {
         return baseN::isValid(str, map);
     }
-    size_t sizeEncoded(std::span<const uint8_t> data) noexcept
+    size_t sizeEncoded(std::span<const uint8_t> data)
     {
         return baseN::sizeEncoded(data, 58);
     }
@@ -43,23 +44,23 @@ namespace base58
     {
         return baseN::sizeDecoded(str, 58, digits);
     }
-    size_t encode(const uint8_t *data, size_t data_size, char *str, size_t str_size) noexcept
+    size_t encode(const uint8_t *data, size_t data_size, char *str, size_t str_size)
     {
         return baseN::encode(data, data_size, str, str_size, 58, digits);
     }
-    std::string encode(std::span<const uint8_t> data) noexcept
+    std::string encode(std::span<const uint8_t> data)
     {
         return baseN::encode(data, 58, digits);
     }
-    size_t decode(const char *str, size_t str_size, uint8_t *data, size_t data_size) noexcept
+    size_t decode(const char *str, size_t str_size, uint8_t *data, size_t data_size)
     {
         return baseN::decode(str, str_size, data, data_size, 58, digits, map);
     }
-    std::vector<uint8_t> decode(std::string_view str) noexcept
+    std::vector<uint8_t> decode(std::string_view str)
     {
         return baseN::decode(str, 58, digits, map);
     }
-    std::string encodeCheck(std::span<const uint8_t> data) noexcept
+    std::string encodeCheck(std::span<const uint8_t> data)
     {
         std::vector<uint8_t> buff(data.begin(), data.end()), dhash;
         dhash = hash::sha256(hash::sha256(data));
@@ -71,13 +72,13 @@ namespace base58
         std::vector<uint8_t> buff(base58::decode(str));
         if (buff.size() < 4)
         {
-            throw std::logic_error("base58::decodeCheck: incorrect padding");
+            throw basen::Exception(basen::Exception::Code::PADDING);
         }
         std::span<uint8_t> data(buff.begin(), buff.end() - 4);
         std::span<uint8_t> dhash(buff.end() - 4, buff.end());
         if (!std::equal(dhash.begin(), dhash.end(), hash::sha256(hash::sha256(data)).begin()))
         {
-            throw std::logic_error("base58::decodeCheck: checksum incorrect");
+            throw basen::Exception(basen::Exception::Code::CHECKSUM);
         }
         return std::vector<uint8_t>(data.begin(), data.end());
     }
diff --git a/test/test-base58.cpp b/test/test-base58.cpp
index 3b2785f..ad7202b 100644
--- a/test/test-base58.cpp
+++ b/test/test-base58.cpp
@@ -1,6 +1,7 @@
 #include <utility>
 
 #include <basen/base58.hpp>
+#include <basen/Exception.hpp>
 #include <basen/hex.hpp>
 #include <gtest/gtest.h>
 
@@ -18,14 +19,7 @@ TEST(base58, encodeCheck)
 TEST(base58, decodeCheck)
 {
     EXPECT_EQ(test.first, hex::encode(decodeCheck(test.second)));
-    try
-    {
-        decodeCheck("incorrect");
-    }
-    catch (const std::exception &e)
-    {
-        EXPECT_STREQ(e.what(), "base58::decodeCheck: checksum incorrect");
-    }
+    EXPECT_THROW(decodeCheck("incorrect"), basen::Exception);
 }
 
 int main(int argc, char **argv)