diff --git a/Makefile b/Makefile
index 25f730f..55b6a17 100644
--- a/Makefile
+++ b/Makefile
@@ -15,7 +15,7 @@ OBJS =\
 	base64\
 	hash/sha256\
 
-TOOLS =\
+TOOLS = ${LIB}
 
 TESTS =\
 	test-hex\
diff --git a/src/basen.cpp b/src/basen.cpp
index 08ace15..e51308e 100644
--- a/src/basen.cpp
+++ b/src/basen.cpp
@@ -1,19 +1,83 @@
+#include <functional>
 #include <iostream>
+#include <unordered_map>
 
 #include <argparse/argparse.hpp>
 
 #include <basen.hpp>
 
+#ifdef _WIN32
+#include <io.h>
+#include <fcntl.h>
+#else
+#include <unistd.h>
+#endif
+
+namespace basen
+{
+    typedef std::string (*encoder_t)(std::span<const uint8_t>);
+    typedef std::vector<uint8_t> (*decoder_t)(std::string_view);
+
+    const std::unordered_map<std::string, encoder_t> encoders = {
+        {"base58", base58::encode},
+        {"base58check", base58::encodeCheck},
+        {"base64", base64::encode},
+        {"hex", hex::encode},
+    };
+    const std::unordered_map<std::string, decoder_t> decoders = {
+        {"base58", base58::decode},
+        {"base58check", base58::decodeCheck},
+        {"base64", base64::decode},
+        {"hex", hex::decode},
+    };
+
+    std::string getPipe()
+    {
+        std::string str;
+        str.reserve(1024 * 1024);
+#ifdef _WIN32
+        if (_isatty(_fileno(stdin)))
+#else
+        if (isatty(fileno(stdin)))
+#endif
+        {
+            throw std::logic_error("basen::getPipe: should use pipe syntax");
+        }
+        else
+        {
+            char temp[4096];
+            while (std::cin.read(temp, sizeof(temp)))
+            {
+                str.insert(str.end(), temp, temp + std::cin.gcount());
+            }
+            str.insert(str.end(), temp, temp + std::cin.gcount());
+        }
+        if (!str.empty() && str.back() == '\n')
+        {
+            str.erase(str.size() - 1);
+        }
+        return str;
+    }
+    uint8_t error(const std::string &str, argparse::ArgumentParser &program) noexcept
+    {
+        std::cerr << str << '\n';
+        std::cerr << program << '\n';
+        return 1;
+    }
+}
+
 int main(int argc, char *argv[])
 {
     argparse::ArgumentParser program("basen", "1.1.0");
     program.add_argument("-t", "--type")
         .help("encoding type")
         .metavar("STRING")
-        .choices("base58", "base64", "hex")
-        .default_value("hex");
+        .choices("base58", "base58check", "base64", "hex");
+    program.add_argument("-a", "--alphabet")
+        .help("specify alphabet")
+        .metavar("STRING");
     program.add_argument("-d", "--decode")
-        .help("is decode")
+        .help("decode flag")
         .flag();
     try
     {
@@ -21,9 +85,65 @@ int main(int argc, char *argv[])
     }
     catch (const std::exception &err)
     {
-        std::cerr << err.what() << '\n';
-        std::cerr << program;
-        return 1;
+        return basen::error(err.what(), program);
+    }
+    if (!program.is_used("-t") && !program.is_used("-a"))
+    {
+        return basen::error("either -t or -a should be provided", program);
+    }
+    if (program.is_used("-t") && program.is_used("-a"))
+    {
+        return basen::error("-t and -a cannot be used together", program);
+    }
+    std::string str;
+    try
+    {
+        str = basen::getPipe();
+    }
+    catch (const std::exception &e)
+    {
+        return basen::error("should use pipe syntax ( | or < )", program);
+    }
+    if (program.is_used("-t"))
+    {
+        auto type = program.get<std::string>("-t");
+        if (program.is_used("-d"))
+        {
+            auto data = (*basen::decoders.at(type))(str);
+            std::for_each(data.begin(), data.end(), [](uint8_t item)
+                          { std::cout << (char)item; });
+            std::cout << '\n';
+        }
+        else
+        {
+            std::span<uint8_t> dv((uint8_t *)str.data(), str.size());
+            std::cout << (*basen::encoders.at(type))(dv) << '\n';
+        }
+    }
+    if (program.is_used("-a"))
+    {
+        auto alphabet = program.get<std::string>("-a");
+        int8_t map[256];
+        try
+        {
+            baseN::digitsMap(alphabet.data(), alphabet.size(), map);
+        }
+        catch (const std::exception &e)
+        {
+            return basen::error("alphabet contains same characters", program);
+        }
+        if (program.is_used("-d"))
+        {
+            auto data = baseN::decode(str, alphabet.size(), alphabet.data(), map);
+            std::for_each(data.begin(), data.end(), [](uint8_t item)
+                          { std::cout << (char)item; });
+            std::cout << '\n';
+        }
+        else
+        {
+            std::span<uint8_t> dv((uint8_t *)str.data(), str.size());
+            std::cout << baseN::encode(dv, alphabet.size(), alphabet.data()) << '\n';
+        }
     }
     return 0;
 }
\ No newline at end of file