From 684b6d78ea5b19aeec8c1916256c9f2c55b1996f Mon Sep 17 00:00:00 2001
From: Infendro <infendro@noreply.infendro.com>
Date: Sun, 18 Jan 2026 22:15:25 +0100
Subject: [PATCH] implement Base56 and Base58

---
 .../com/infendro/encoding/numeric/Base56.kt   |  5 +++
 .../com/infendro/encoding/numeric/Base58.kt   |  5 +++
 .../com/infendro/encoding/numeric/Base56.kt   | 37 +++++++++++++++++++
 .../com/infendro/encoding/numeric/Base58.kt   | 37 +++++++++++++++++++
 4 files changed, 84 insertions(+)
 create mode 100644 src/commonMain/kotlin/com/infendro/encoding/numeric/Base56.kt
 create mode 100644 src/commonMain/kotlin/com/infendro/encoding/numeric/Base58.kt
 create mode 100644 src/commonTest/kotlin/com/infendro/encoding/numeric/Base56.kt
 create mode 100644 src/commonTest/kotlin/com/infendro/encoding/numeric/Base58.kt

diff --git a/src/commonMain/kotlin/com/infendro/encoding/numeric/Base56.kt b/src/commonMain/kotlin/com/infendro/encoding/numeric/Base56.kt
new file mode 100644
index 0000000..141d002
--- /dev/null
+++ b/src/commonMain/kotlin/com/infendro/encoding/numeric/Base56.kt
@@ -0,0 +1,5 @@
+package com.infendro.encoding.numeric
+
+private val alphabet = "23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnpqrstuvwxyz".encodeToByteArray()
+
+object Base56 : NumericEncoding(alphabet)
diff --git a/src/commonMain/kotlin/com/infendro/encoding/numeric/Base58.kt b/src/commonMain/kotlin/com/infendro/encoding/numeric/Base58.kt
new file mode 100644
index 0000000..471a293
--- /dev/null
+++ b/src/commonMain/kotlin/com/infendro/encoding/numeric/Base58.kt
@@ -0,0 +1,5 @@
+package com.infendro.encoding.numeric
+
+private val alphabet = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz".encodeToByteArray()
+
+object Base58 : NumericEncoding(alphabet)
diff --git a/src/commonTest/kotlin/com/infendro/encoding/numeric/Base56.kt b/src/commonTest/kotlin/com/infendro/encoding/numeric/Base56.kt
new file mode 100644
index 0000000..8f460a7
--- /dev/null
+++ b/src/commonTest/kotlin/com/infendro/encoding/numeric/Base56.kt
@@ -0,0 +1,37 @@
+package com.infendro.encoding.numeric
+
+import com.infendro.encoding.Encoding
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+
+class `Base56 Test` {
+    val encoding: Encoding
+        get() = Base56
+
+    val original = "Hello World!".encodeToByteArray()
+    val encoded = "4q9snPvV4iRDWVKjK".encodeToByteArray()
+
+    @Test
+    fun `encode empty`() {
+        val actual = encoding.encode(byteArrayOf())
+        assertContentEquals(byteArrayOf(), actual)
+    }
+
+    @Test
+    fun `decode empty`() {
+        val actual = encoding.decode(byteArrayOf())
+        assertContentEquals(byteArrayOf(), actual)
+    }
+
+    @Test
+    fun encode() {
+        val actual = encoding.encode(original).also { println(it.decodeToString()) }
+        assertContentEquals(encoded, actual)
+    }
+
+    @Test
+    fun decode() {
+        val actual = encoding.decode(encoded)
+        assertContentEquals(original, actual)
+    }
+}
diff --git a/src/commonTest/kotlin/com/infendro/encoding/numeric/Base58.kt b/src/commonTest/kotlin/com/infendro/encoding/numeric/Base58.kt
new file mode 100644
index 0000000..5da5d2a
--- /dev/null
+++ b/src/commonTest/kotlin/com/infendro/encoding/numeric/Base58.kt
@@ -0,0 +1,37 @@
+package com.infendro.encoding.numeric
+
+import com.infendro.encoding.Encoding
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+
+class `Base58 Test` {
+    val encoding: Encoding
+        get() = Base58
+
+    val original = "Hello World!".encodeToByteArray()
+    val encoded = "2NEpo7TZRRrLZSi2U".encodeToByteArray()
+
+    @Test
+    fun `encode empty`() {
+        val actual = encoding.encode(byteArrayOf())
+        assertContentEquals(byteArrayOf(), actual)
+    }
+
+    @Test
+    fun `decode empty`() {
+        val actual = encoding.decode(byteArrayOf())
+        assertContentEquals(byteArrayOf(), actual)
+    }
+
+    @Test
+    fun encode() {
+        val actual = encoding.encode(original)
+        assertContentEquals(encoded, actual)
+    }
+
+    @Test
+    fun decode() {
+        val actual = encoding.decode(encoded)
+        assertContentEquals(original, actual)
+    }
+}