diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..57872d0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/vendor/
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..fb3699f
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,12 @@
+{
+    "name": "kvazar/crypto",
+    "description": "Crypto Tools for PHP 8",
+    "type": "library",
+    "license": "MIT",
+    "autoload": {
+        "psr-4": {
+            "Kvazar\\Crypto\\": "src/"
+        }
+    },
+    "require": {}
+}
diff --git a/src/Base58.php b/src/Base58.php
new file mode 100644
index 0000000..d015fd7
--- /dev/null
+++ b/src/Base58.php
@@ -0,0 +1,123 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kvazar\Crypto;
+
+use Kvazar\Crypto\Hash;
+use Kvazar\Crypto\Tool;
+
+class Base58
+{
+    private const AVAILABLE_CHARS = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
+
+    public static function encode(
+        string $value,
+        ?int   $prefix = 128,
+        ?bool  $compressed = true
+    ): string
+    {
+        $value = hex2bin(
+            $value
+        );
+
+        if ($prefix)
+        {
+            $value = chr(
+                $prefix
+            ) . $value;
+        }
+
+        if ($compressed)
+        {
+            $value .= chr(
+                0x01
+            );
+        }
+
+        $value = $value . substr(
+            Hash::sha256(
+                Hash::sha256(
+                    $value
+                )
+            ), 0, 4
+        );
+
+        $base58 = self::_encode(
+            Tool::bin2bc(
+                $value
+            )
+        );
+
+        for ($i = 0; $i < strlen($value); $i++)
+        {
+
+            if ($value[$i] != '\x00')
+            {
+                break;
+            }
+
+            $base58 = '1' . $base58;
+        }
+
+        return $base58;
+    }
+
+    public static function decode(
+        string $value,
+        ?int $removeLeadingBytes  = 1,
+        ?int $removeTrailingBytes = 4,
+        ?bool $removeCompression  = true
+    )
+    {
+        $value = bin2hex(
+            Tool::bc2bin(
+                self::_decode(
+                    $value
+                )
+            )
+        );
+
+        if ($removeLeadingBytes)
+        {
+            $value = substr(
+                $value,
+                $removeLeadingBytes * 2
+            );
+        }
+
+        if ($removeTrailingBytes)
+        {
+            $value = substr(
+                $value, 0, -($removeTrailingBytes * 2)
+            );
+        }
+
+        if ($removeCompression)
+        {
+            $value = substr(
+                $value, 0, -2
+            );
+        }
+
+        return $value;
+    }
+
+    private static function _encode($num, $length = 58): string
+    {
+        return Tool::dec2base(
+            $num,
+            $length,
+            self::AVAILABLE_CHARS
+        );
+    }
+
+    private static function _decode(string $value, int $length = 58): string
+    {
+        return Tool::base2dec(
+            $value,
+            $length,
+            self::AVAILABLE_CHARS
+        );
+    }
+}
\ No newline at end of file
diff --git a/src/Hash.php b/src/Hash.php
new file mode 100644
index 0000000..9ca8c5a
--- /dev/null
+++ b/src/Hash.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kvazar\Crypto;
+
+class Hash
+{
+    public static function sha256(string $data, $raw = true): string
+    {
+        return hash(
+            'sha256',
+            $data,
+            $raw
+        );
+    }
+
+    public static function sha256d(string $data): string
+    {
+        return hash(
+            'sha256',
+            hash(
+                'sha256',
+                $data,
+                true
+            ),
+            true
+        );
+    }
+
+    public static function ripemd160(string $data, $raw = true): string
+    {
+        return hash(
+            'ripemd160',
+            $data,
+            $raw
+        );
+    }
+}
\ No newline at end of file
diff --git a/src/Tool.php b/src/Tool.php
new file mode 100644
index 0000000..4249bcf
--- /dev/null
+++ b/src/Tool.php
@@ -0,0 +1,142 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kvazar\Crypto;
+
+class Tool
+{
+    public static function bc2bin($num)
+    {
+        return self::dec2base(
+            $num,
+            256
+        );
+    }
+
+    public static function dec2base($dec, $base, $digits = false): ?string
+    {
+        if ($base < 2 || $base > 256)
+        {
+            return null;
+        }
+
+        bcscale(0);
+
+        $value = '';
+
+        if (!$digits)
+        {
+            $digits = self::digits(
+                $base
+            );
+        }
+
+        while ($dec > $base - 1)
+        {
+            $rest  = bcmod(
+                $dec,
+                $base
+            );
+
+            $dec   = bcdiv(
+                $dec,
+                $base
+            );
+
+            $value = $digits[$rest] . $value;
+        }
+
+        $value = $digits[intval($dec)] . $value;
+
+        return (string) $value;
+    }
+
+    public static function base2dec($value, $base, $digits = false): ?string
+    {
+        if ($base < 2 || $base > 256)
+        {
+            return null;
+        }
+
+        bcscale(0);
+
+        if ($base < 37)
+        {
+            $value = strtolower(
+                $value
+            );
+        }
+
+        if (!$digits)
+        {
+            $digits = self::digits(
+                $base
+            );
+        }
+
+        $size = strlen(
+            $value
+        );
+
+        $dec = '0';
+
+        for ($loop = 0; $loop < $size; $loop++)
+        {
+            $element = strpos(
+                $digits,
+                $value[$loop]
+            );
+
+            $power = bcpow(
+                $base,
+                $size - $loop - 1
+            );
+
+            $dec = bcadd(
+                $dec,
+                bcmul(
+                    $element,
+                    $power
+                )
+            );
+        }
+
+        return (string) $dec;
+    }
+
+    public static function digits($base): string
+    {
+        if ($base > 64)
+        {
+            $digits = '';
+
+            for ($loop = 0; $loop < 256; $loop++)
+            {
+                $digits .= chr(
+                    $loop
+                );
+            }
+        }
+
+        else
+        {
+            $digits = '0123456789abcdefghijklmnopqrstuvwxyz';
+            $digits .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ-_';
+        }
+
+        $digits = substr(
+            $digits, 0, $base
+        );
+
+        return (string) $digits;
+    }
+
+    public static function bin2bc($num)
+    {
+        return self::base2dec(
+            $num,
+            256
+        );
+    }
+}
\ No newline at end of file